94 results on '"Dagum AB"'
Search Results
2. Abstract 112
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Danovich, Svetlana, primary, Phillips, B, additional, Verma, R, additional, Bishawi, M, additional, Dagum, AB, additional, Bui, DT, additional, and Khan, SU, additional
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- 2013
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3. Abstract 38P
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Rodman, AJ, primary, Conkling, N, additional, Bhatnagar, D, additional, Phillips, BT, additional, Rafailovich, M, additional, Bui, DT, additional, Khan, SU, additional, and Dagum, AB, additional
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- 2012
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4. Abstract 45
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Phillips, BT, primary, Fourman, MS, additional, Dagum, AB, additional, Ganz, JC, additional, Khan, SU, additional, and Bui, DT, additional
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- 2012
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5. Abstract 10
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Fourman, MS, primary, Phillips, BT, additional, Rivara, A, additional, Gersch, R, additional, Rosengart, TK, additional, and Dagum, AB, additional
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- 2012
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6. 33: DIGITAL IMAGE SPECKLE CORRELATION (DISC) ANALYSIS AS A PROSPECTIVE QUANTITATIVE CLINICAL OUTCOMES METRIC FOR COSMETIC TREATMENT WITH BOTULINUM TOXIN TYPE A
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Conkling, N, primary, Phillips, BT, additional, Bhatnagar, D, additional, Rafailovich, M, additional, Wang, ED, additional, Melendez, MM, additional, Khan, SU, additional, Bui, DT, additional, and Dagum, AB, additional
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- 2011
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7. 115: CAN INTRAOPERATIVE PERFUSION TECHNIQUES ACCURATELY PREDICT MASTECTOMY SKIN FLAP NECROSIS?
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Phillips, BT, primary, Lanier, ST, additional, Conkling, N, additional, Wang, ED, additional, Dagum, AB, additional, Ganz, JC, additional, Khan, SU, additional, and Bui, DT, additional
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- 2011
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8. 88C: HOW LONG DO WE NEED POSTOPERATIVE ANTIBIOTIC PROPHYLAXIS FOR IMMEDIATE BREAST RECONSTRUCTION?
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Phillips, BT, primary, Wang, ED, additional, Lanier, ST, additional, Khan, SU, additional, Dagum, AB, additional, and Bui, DT, additional
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- 2010
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9. 95C: THE ASSOCIATION BETWEEN CLOSED SUCTION DRAINAGE DURATION AND COMPLICATION RATES IN TISSUE EXPANDER/IMPLANT BREAST RECONSTRUCTION WITH ANTIBIOTIC PROPHYLAXIS
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Lanier, ST, primary, Wang, ED, additional, Phillips, BT, additional, Khan, SU, additional, Dagum, AB, additional, and Bui, DT, additional
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- 2010
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10. 29: RISKS AND REWARDS OF ACELLULAR DERMAL MATRIX IN TISSUE EXPANDER/IMPLANT BREAST RECONSTRUCTION
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Wang, ED, primary, Lanier, ST, additional, Phillips, BT, additional, Arora, BP, additional, Katz, SM, additional, Khan, SU, additional, Dagum, AB, additional, and Bui, DT, additional
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- 2010
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11. Porcine wound healing in full thickness skin defects using IntegraTM with and without fibrin glue with keratinocytes
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Melendez, MM, primary, Martinez, RR, additional, Dagum, AB, additional, and McClain, SA, additional
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- 2008
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12. Current management of acute cutaneous wounds.
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Singer AJ and Dagum AB
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- 2008
13. Severe multiple mononeuropathy in patients with major thermal burns.
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Dagum AB, Peters WJ, Neligan PC, and Douglas LG
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- 1993
14. False aneurysm of the superficial palmar arch causing acute carpal tunnel syndrome.
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Slesarenko YA, Dagum AB, Hurst LC, Slesarenko, Yury A, Dagum, Alexander B, and Hurst, Lawrence C
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- 2007
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15. Management of acute cutaneous wounds.
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Trautinger F, Guyot A, Lucet J, Descamps V, Kaufman JL, Singer AJ, and Dagum AB
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- 2008
16. A Novel Rat Model to Simulate Positive Margins in the Wound Bed of a Resected Sarcoma.
- Author
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Singh G, Kaymakcalan O, Hays TR, Abbas A, Sridevan S, Kaur J, Rathi S, Marquez J, Ghazizadeh S, Tavernier F, Boyce BF, Khan SU, Khan FA, Bui DT, and Dagum AB
- Abstract
Background: One reason for local recurrence is the presence of positive surgical margins after tumor resection. An animal model accurately representing the microtumor burden will improve our understanding of these surgical margins. Using a rat model, we report a new methodology for creating microscopic tumors., Methods: Four different cell densities (1000, 10,000, 100,000, and 500,000 cells) of virus-induced Rous sarcoma XC cells (ATCC CCL-165) were topically added to 1.0 cm × 1.0 cm full-thickness wounds of male Rowett nude rats. Both Tegaderm and Tensoplast were then used to dress the wounds. After 9 days, the wound beds were excised, stained with hematoxylin and eosin, and analyzed using National Institutes of Health Image J software., Results: Better healing of the wound beds was observed for the smaller 2 cell densities (1000 and 10,000) as opposed to the higher 2 densities (100,000 and 500,000). The 2 higher cell density groups had gross identifiable tumors that extended deep through the dermis. On the other hand, the smaller cell density groups had microscopic tumor masses. Inflammation was present in all groups irrespective of the initial tumor cell densities, whereas hemorrhage was present only in the 2 higher cell density groups., Conclusions: This methodology can create a clinically relevant scenario of positive surgical margins after tumor resection. This induction method is simple, reasonably quick to use, and requires minimal surgical expertise. This approach could also develop microscopically positive margins for a much more comprehensive array of cancers., Competing Interests: The authors have no financial interest to declare in relation to the content of this article. This project received funding from Targeted Research Opportunities Clinical Research Awards, Stony Brook School of Medicine., (Copyright © 2024 The Authors. Published by Wolters Kluwer Health, Inc. on behalf of The American Society of Plastic Surgeons.)
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- 2024
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17. The Small Finger Reverse Ulnar Digital Artery Hypothenar Palmar Perforator Flap: An Anatomical Study With Clinical Examples.
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Kunda N, Cai SB, and Dagum AB
- Abstract
Background: Local flaps are commonly used for reconstruction of digital soft-tissue defects. There remains a paucity of options available for small finger volar and dorsal soft-tissue defects distal to the proximal interphalangeal joint. The purpose of this study was to analyze perforators along the hypothenar palmar region arising from the artery of the ulnar side of the small finger as it comes off the superficial palmar arch for consistency and potential to be used for perforator-based flap reconstruction of soft-tissue defects and joint coverage of the small finger., Methods: Four cadaveric upper extremities were injected with Microfil silicone injection compound. Dissection was performed from the superficial palmar arch to the ulnar digital artery of the small finger, and perforators were identified and analyzed for consistency and utility. Flap elevation was performed based on these perforators in a small finger reverse ulnar digital artery fashion., Results: All cadaveric dissections showed a suitable perforator pattern along the hypothenar palmar region with a minimum of 5 perforators available from which to base a flap to address dorsal and volar defects of the small finger. Two clinical examples are presented confirming the viability and utility of this flap., Conclusions: A detailed anatomic study with 2 clinical examples of this retrograde pedicle island flap is presented. The small finger reverse ulnar digital artery hypothenar palmar-based perforator flaps are a viable option with a reliable perforator pattern, providing a functional solution for reconstruction of soft-tissue defects and joint coverage of the small finger., Competing Interests: The authors have no financial interest to declare in relation to the content of this article. Funding for the study was provided by the Department of Orthopedic Surgery at Stony Brook University., (Copyright © 2024 The Authors. Published by Wolters Kluwer Health, Inc. on behalf of The American Society of Plastic Surgeons.)
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- 2024
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18. Autologous Skin Grafts, versus Tissue-engineered Skin Constructs: A Systematic Review and Meta-analysis.
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Kianian S, Zhao K, Kaur J, Lu KW, Rathi S, Ghosh K, Rogoff H, Hays TR, Park J, Rafailovich M, Simon M, Bui DT, Khan SU, Dagum AB, and Singh G
- Abstract
For over 100 years, autologous skin grafts have remained the gold standard for the reconstruction of wounds but are limited in availability. Acellular tissue-engineered skin constructs (acellular TCs) and cellular tissue-engineered skin constructs (cellular TCs) may address these limitations. This systematic review and meta-analysis compare outcomes between them., Methods: A systematic review was conducted using PRISMA guidelines, querying MEDLINE, Embase, Web of Science, and Cochrane to assess graft incorporation, failure, and wound healing. Case reports/series, reviews, in vitro/in vivo work, non-English articles or articles without full text were excluded., Results: Sixty-six articles encompassing 4076 patients were included. No significant differences were found between graft failure rates (P = 0.07) and mean difference of percent reepithelialization (p = 0.92) when split-thickness skin grafts were applied alone versus co-grafted with acellular TCs. Similar mean Vancouver Scar Scale was found for these two groups (p = 0.09). Twenty-one studies used at least one cellular TC. Weighted averages from pooled results did not reveal statistically significant differences in mean reepithelialization or failure rates for epidermal cellular TCs compared with split-thickness skin grafts (p = 0.55)., Conclusions: This systematic review is the first to illustrate comparable functional and wound healing outcomes between split-thickness skin grafts alone and those co-grafted with acellular TCs. The use of cellular TCs seems promising from preliminary findings. However, these results are limited in clinical applicability due to the heterogeneity of study data, and further level 1 evidence is required to determine the safety and efficacy of these constructs., Competing Interests: The authors have no financial interest to declare in relation to the content of this article. This study was supported by Feldstein Medical Foundation (FMF). Disclosure statements are at the end of this article, following the correspondence information., (Copyright © 2023 The Authors. Published by Wolters Kluwer Health, Inc. on behalf of The American Society of Plastic Surgeons.)
- Published
- 2023
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19. An Anatomical Feasibility Study on the Use of the Hypoglossal and Hemihypoglossal Nerve as a Donor Motor Nerve for Free Functioning Muscle Transfer in Upper Extremity Reconstruction.
- Author
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Liao CD, Lu YH, Guillen PT, and Dagum AB
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- Male, Female, Humans, Feasibility Studies, Elbow, Cadaver, Brachial Plexus surgery, Brachial Plexus injuries, Brachial Plexus Neuropathies surgery, Gracilis Muscle transplantation, Nerve Transfer
- Abstract
Purpose: Brachial plexus injuries (BPI) with complete root avulsions remains a clinical challenge due to a paucity of nerves available for nerve transfer and innervation of free functioning muscle transfers (FFMT). The hypoglossal and hemihypoglossal nerve has not been studied as a donor nerve option for FFMTs in brachial plexus reconstruction, despite successful outcomes of hypoglossal nerve transfers in facial reanimation surgery. We hypothesized that the hypoglossal nerve could be an appropriate candidate for surgical repair of BPI using FFMT., Methods: A cadaveric study was performed to determine the anatomic feasibility of using the hypoglossal and hemihypoglossal nerves as donor nerves to neurotize the gracilis or latissimus dorsi muscle in an FFMT to restore elbow flexion. Twelve cadavers (6 males and 6 females) were studied. The hypoglossal nerve, thoracodorsal nerve, and obturator nerve branches to the gracilis muscle were dissected, measured, and analyzed., Results: The average length of the hypoglossal nerve was 6.3 ± 0.5 cm in both sexes. The average distance between the lowest point of the hypoglossal nerve and the lateral clavicle was 8.4 ± 1.3 cm in males and 7.7 ± 0.8 cm in females. When the hypoglossal nerve was transected distally, the average distance to the clavicle was 4.5 ± 1.6 cm in males and 3.8 ± 1.5 cm in females., Conclusions: The maximum theoretical length of the donor nerve required to perform an adequate FFMT using the hypoglossal nerve was 8.9 ± 1.2 cm, which was well exceeded by the lengths of the thoracodorsal nerve (14.5 ± 1.3 cm) and nerve to the gracilis muscle (12.7 ± 1.7 cm)., Clinical Relevance: This cadaveric study demonstrated that the hypoglossal or hemihypoglossal nerves may be used as potential motor donor nerves to innervate a free gracilis or latissimus dorsi muscle transfer for the restoration of elbow flexion via a direct nerve transfer without the need for nerve grafting., (Copyright © 2023 American Society for Surgery of the Hand. Published by Elsevier Inc. All rights reserved.)
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- 2023
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20. Six-year Burden of Care for Nonsyndromic Unilateral Cleft Lip and Palate Patients: A Comparison Between Cleft Centers and Noncleft Centers.
- Author
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Janssen PL, Ghosh K, Klein GM, Hou W, Bellber CS, and Dagum AB
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- Humans, Infant, New York, Cost of Illness, Cleft Lip surgery, Cleft Palate surgery
- Abstract
Objective: To determine differences in burden of care between nonsyndromic patients with unilateral cleft lip and palate undergoing treatment at American Cleft Palate-Craniofacial Association (ACPA)-accredited centers and nonaccredited centers in New York State., Design: A retrospective review of the New York Statewide Planning and Research Cooperative System database from January 2001 to December 2014 was performed using ICD-9 and CPT coding., Patients, Participants: This study included patients with unilateral cleft lip and palate who underwent both lip and palate repairs during their first 6 years of life. Exclusion criteria included orofacial cleft syndromes, follow-up under 6 years, and one-stage combined cleft lip and palate repairs., Results: Eighty-eight patients were treated at cleft centers, and 29 patients at nonaccredited centers ( n = 117). Age at primary palatoplasty (13.0 months vs 18.1 months; p = .019), total number of cleft operations (2.3 vs 2.7; p = .012), and total number of primary cleft-specific procedures (2.2 vs 2.5; p = .0049) were significantly lower for patients treated in cleft centers. Age at primary cheiloplasty (4.8 months vs 4.6 months; p = .865), post-cheiloplasty length of stay (1.2 days vs 1.2 days; p = .673), post-palatoplasty length of stay (1.5 days vs 1.9 days; p = .211), average hospital admissions (2.2 vs 2.3; p = 0.161), and total complication rates (34.1% vs 21.1%; p = 0.517) did not differ significantly between cleft centers and noncenters., Conclusions: This data demonstrates some significant differences in overall 6 year burden of care for nonsyndromic patients with unilateral cleft lip and palate treated at ACPA-accredited cleft centers versus nonaccredited centers.
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- 2023
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21. Negative-Pressure Wound Therapy versus Standard Surgical Dressings after Malignant Tumor Resection: A Systematic Review and Meta-Analysis.
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Hays TR, Singh G, Saragossi J, Park J, Shekar S, Marquez JE, Dagum AB, Khan SU, Khan FA, and Bui DT
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- Bandages, Humans, Prospective Studies, Retrospective Studies, Surgical Wound Infection epidemiology, Surgical Wound Infection etiology, Surgical Wound Infection prevention & control, Negative-Pressure Wound Therapy
- Abstract
Background: Negative-pressure wound therapy offers many advantages over standard surgical dressings in the treatment of open wounds, including accelerated wound healing, cost savings, and reduced complication rates. Although contraindicated by device manufacturers in malignancy-resected wounds because of hypothesized risk of tumor recurrence, negative-pressure wound therapy is still applied postoperatively because of limited clinical support. The authors performed a systematic review with meta-analysis to compare negative-pressure wound therapy outcomes with those of standard surgical dressings on open wounds, with their null hypothesis stating there would be no outcome differences., Methods: A systematic review of the literature on negative-pressure wound therapy and standard surgical dressings on malignancy-resected wounds was conducted following Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines using PubMed, Embase, CINAHL, and Cochrane Central databases. Meta-analysis compared group outcomes, including malignancy recurrence, wound complication, and surgical site infection rates, with a random effects model., Results: A total of 1634 studies were identified and 27 met eligibility criteria, including four randomized controlled trials, four prospective cohort studies, and 19 retrospective reviews. Eighty-one percent of articles ( n = 22) recommended negative-pressure wound therapy in malignancy-resected wounds. Meta-analysis determined that the treatment yielded significantly lower overall surgical site infection ( p = 0.004) and wound complication ( p = 0.01) rates than standard surgical dressings; however, there were no statistically significant differences found for other outcomes between the two groups., Conclusions: This review demonstrates favorable outcomes of negative-pressure wound therapy over standard surgical dressings for malignancy-resected wounds without an increased risk of malignancy recurrence. However, because limited randomized controlled trials (detailing only incisional wounds for limited malignancies and anatomic regions) are available, additional high-power randomized controlled trials are recommended., (Copyright © 2022 by the American Society of Plastic Surgeons.)
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- 2022
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22. Efficacy of leupeptin in treating ischemia in a rat hind limb model.
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Gurevich M, Iocolano K, Martin IN, Singh G, Khan SU, Bui DT, Dagum AB, and Komatsu DE
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- Animals, Hindlimb blood supply, Leupeptins pharmacology, Muscle, Skeletal, Rats, Rats, Sprague-Dawley, Calpain, Ischemia drug therapy
- Abstract
Prolonged tourniquet use can lead to tissue ischemia and can cause progressive muscle and nerve injuries. Such injuries are accompanied by calpain activation and subsequent Wallerian-like degeneration. Several known inhibitors, including leupeptin, are known to impede the activity of calpain and associated tissue damage. We hypothesize that employment of leupeptin in a rat model of prolonged hind limb ischemia can mitigate muscle and nerve injuries. Sprague-Dawley rats (n = 10) weighing between 300-400 g were employed in this study. Their left hind limbs were subjected to blood flow occlusion for a period of 2-h using a neonatal blood pressure cuff. Five rats were given twice weekly intramuscular leupeptin injections, while the other five received saline. After 2 weeks, the animals were euthanized, their sciatic nerves and gastrocnemius muscles were harvested, fixed, stained, and analyzed using NIH Image J software. The administration of leupeptin resulted in larger gastrocnemius muscle fiber cross-sectional areas for the right (non-tourniquet applied) hindlimb as compared to that treated with the saline (p = 0.0110). However, no statistically significant differences were found between these two groups for the injured left hindlimb (p = 0.1440). With regards to the sciatic nerve cross-sectional areas and sciatic functional index, no differences were detected between the leupeptin and control treated groups for both the healthy and injured hindlimbs. This research provides new insights on how to employ leupeptin to inhibit the degenerative effects of calpain and preserve tissues following ischemia resulting from orthopedic or plastic surgery procedures., (© 2022 The Authors. Physiological Reports published by Wiley Periodicals LLC on behalf of The Physiological Society and the American Physiological Society.)
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- 2022
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23. Engineering functional skin constructs: A quantitative comparison of three-dimensional bioprinting with traditional methods.
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Li J, Fu S, Lu KW, Christie O, Gozelski MT, Cottone MC, Cottone P, Kianian S, Feng KC, Simon M, Rafailovich M, Dagum AB, and Singh G
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- Fibroblasts metabolism, Humans, Keratinocytes metabolism, Printing, Three-Dimensional, Skin pathology, Tissue Engineering methods, Bioprinting methods
- Abstract
Tissue engineering has been successful in reproducing human skin equivalents while incorporating new approaches such as three-dimensional (3D) bioprinting. The latter method offers a plethora of advantages including increased production scale, ability to incorporate multiple cell types and printing on demand. However, the quality of printed skin equivalents compared to those developed manually has never been assessed. To leverage the benefits of this method, it is imperative that 3D-printed skin should be structurally and functionally similar to real human skin. Here, we developed four bilayered human skin epidermal-dermal equivalents: non-printed dermis and epidermis (NN), printed dermis and epidermis (PP), printed epidermis and non-printed dermis (PN), and non-printed epidermis and printed dermis (NP). The effects of printing induced shear stress [0.025 kPa (epidermis); 0.049 kPa (dermis)] were characterized both at the cellular and at the tissue level. At cellular level, no statistically significant differences in keratinocyte colony-forming efficiency (CFE) (p = 0.1641) were observed. In the case of fibroblasts, no significant differences in the cell alignment index (p < 0.1717) and their ability to contract collagen gel (p = 0.851) were detected. At the tissue levels, all the four skin equivalents were characterized using histological and immunohistochemical analysis with no significant differences found in either epidermal basal cell count, thickness of viable epidermis, and relative intensity of filaggrin and claudin-1. Our results demonstrated that 3D printing can achieve the same high-quality skin constructs as have been developed traditionally, thus opening new avenues for numerous high-throughput industrial and clinical applications., (© 2021 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.)
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- 2022
- Full Text
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24. Postoperative Venous Thromboembolism Prophylaxis Utilizing Enoxaparin Does Not Increase Bleeding Complications After Abdominal Body Contouring Surgery.
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Vasilakis V, Klein GM, Trostler M, Mukit M, Marquez JE, Dagum AB, Pannucci CJ, and Khan SU
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- Aftercare, Anticoagulants adverse effects, Enoxaparin adverse effects, Humans, Patient Discharge, Postoperative Complications epidemiology, Postoperative Complications etiology, Postoperative Complications prevention & control, Body Contouring adverse effects, Venous Thromboembolism epidemiology, Venous Thromboembolism etiology, Venous Thromboembolism prevention & control
- Abstract
Background: Venous thromboembolism (VTE) chemoprophylaxis warrants an individualized, risk-stratified approach, and constitutes a relatively controversial topic in plastic surgery., Objectives: The aim of this study was to determine the safety of a 7-day postoperative enoxaparin regimen for VTE prophylaxis compared with a single preoperative dose of heparin in abdominal body contouring surgery., Methods: This single-institution pre-post study investigated the safety of a 7-day enoxaparin postoperative regimen in abdominal body contouring procedures performed by a single surgeon from 2007 to 2018. Four procedures were included: traditional panniculectomy, abdominoplasty, fleur-de-lis panniculectomy, and body contouring liposuction. Group I patients received a single dose of 5000 U subcutaneous heparin in the preoperative period, and no postoperative chemical prophylaxis was administered. Group II patients received 40 mg subcutaneous enoxaparin in the immediate preoperative period, then once daily for 7 days postoperatively., Results: A total of 195 patients were included in the study, 66 in Group I and 129 in Group II. The groups demonstrated statistically similar VTE risk profiles, based on the 2005 Caprini risk-assessment model. There were no statistically significant differences in the 2 primary outcomes: postoperative bleeding and VTE events. Group I patients had higher reoperation rates (22.7% vs 10.1%, P = 0.029), which was secondary to higher rates of revision procedures., Conclusions: A 7-day postoperative course of once-daily enoxaparin for VTE risk reduction in abdominal body contouring surgery does not significantly increase the risk of bleeding. Implementation of this regimen for postdischarge chemoprophylaxis, when indicated following individualized risk stratification, is appropriate., (© 2019 The Aesthetic Society. Reprints and permission: journals.permissions@oup.com.)
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- 2020
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25. Screening and Intervention for Skin Cancer in the Galapagos.
- Author
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Ayasse MT, Marquez JE, Lozeau DF, Slutsky JB, Kaufmann TL, Lee Y, Scriven RJ, and Dagum AB
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- Early Detection of Cancer, Eye Color, Humans, Prospective Studies, United States, Carcinoma, Basal Cell diagnosis, Carcinoma, Basal Cell surgery, Melanoma diagnosis, Skin Neoplasms diagnosis, Skin Neoplasms surgery
- Abstract
Objective: This study aimed to assess the general dermatological needs and correlation of tentative skin cancer screening diagnoses with histopathological confirmation in the highly sun-exposed locals of the Galapagos Islands., Methods: An institutional review board-approved prospective study was performed at Blanca's House, a nonprofit surgical volunteer organization, free clinics in the Galapagos. After consent, a 40-item modified SPOTme-inspired questionnaire was completed. Partial or total body skin examinations were conducted by board-certified dermatologists. Board-certified plastic and general surgeons performed excisional biopsies on suspicious lesions. Individuals younger than 18 years, and non-Spanish or non-English speakers were excluded., Results: A total of 273 patients were included in the study, of which 202 reported skin concerns. Benign nevi (n = 76), seborrheic keratosis (n = 42), melasma (n = 19), actinic keratosis (n = 16), acne (n = 15), eczema (n = 13), fungal infections (n = 12), seborrheic dermatitis (n = 5), and psoriasis (n = 5) were most commonly identified.Twelve patients (4.4%) had presumptive skin cancer after screening. Six of 8 biopsies confirmed cancer (group 1), 2 declined a biopsy and 2 were unresectable. Seven basal cell carcinomas and one squamous cell carcinoma were excised with clear margins. A right lower eyelid melanoma was diagnosed and subsequently treated in the United States where invasive melanoma with a Breslow thickness of 0.3 mm was found.Compared with the noncancer group (group 2: n = 265), group 1 had significantly higher likelihood of reporting having seen a dermatologist (P = 0.02), taking any medications (P = 0.0001), having blonde or red hair (P = 0.01), having blue or green eyes (P < 0.0001), and having used indoor tanning equipment (P < 0.0001). Group 1 was also more likely to report 4 or more blistering sunburns (P = 0.08), which approached significance. When evaluated by a dermatologist, group 1 was significantly more likely to be classified as "high risk" for developing cancerous lesions (P < 0.0001) compared with group 2., Conclusions: Skin concerns in the Galapagos included benign and malignant conditions. There is a need for dermatological care in this medically underserved population. This modified SPOTme-inspired skin cancer questionnaire, confirmed by histology, is a useful tool in identifying high-risk patients and detecting skin cancer in international communities that would have otherwise experienced delays in diagnosis or treatment.
- Published
- 2020
- Full Text
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26. Clinical Outcomes After Hematoma Development: A Study of 627 Tissue Expander Breast Reconstructions.
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Rogoff H, Marquez JE, Ghosh K, Jou C, McAuliffe P, Rathi S, Monroig K, Medrano C, Marmor WA, Ferrier A, Kapadia K, Klein G, Huston TL, Ganz J, Dagum AB, Khan S, and Bui D
- Subjects
- Hematoma epidemiology, Hematoma etiology, Humans, Mastectomy, Postoperative Complications epidemiology, Postoperative Complications etiology, Postoperative Complications surgery, Retrospective Studies, Tissue Expansion Devices, Breast Implantation adverse effects, Breast Implants adverse effects, Breast Neoplasms, Mammaplasty adverse effects
- Abstract
Background: Hematomas after tissue expander immediate breast reconstruction (TE-IBR) pose a significant challenge during the recovery period. In this study, we aim to evaluate whether hematoma formation leads to subsequent complications and how management can impact final reconstructive goals., Methods: A single-institution retrospective review of TE-IBRs from 2001 to 2018 was performed using an established breast reconstruction database. Demographics, medications, comorbidities, and complications were identified. Implant loss was defined as removal of the tissue expander/implant without immediate reimplantation during that operation. Hematoma size, management, transfusion requirement, reoperations, and final outcome were recorded. Reconstructive failure was defined as an implant loss that was not replaced with another implant or required secondary autologous reconstruction., Results: Six hundred twenty-seven TE-IBR patients were analyzed. Postoperative hematoma (group 1) occurred in 4.1% (n = 26) of TE-IBRs and did not develop in 95.9% (group 2: n = 601). Group 2 had a higher mean body mass index (24.5 vs 27.3 kg/m, P = 0.018); however, there were no significant differences in smoking status, preoperative/postoperative radiation/chemotherapy, or other comorbidities. Group 1 was found to have increased rates of implant loss (15.4% vs 3.7%, P = 0.0033) and reconstructive failure (11.5% vs 2.8%, P = 0.0133) compared with group 2.Eighteen hematomas (69.2%) underwent surgical intervention (group 1a) compared with 30.8% (n = 8) that were clinically managed (group 1b). Group 1a had statistically significant lower rates of subsequent complications (22.2% vs 62.5%, P = 0.046) and reoperations (5.6% vs 27.5%, P = 0.037) than did group 1b, respectively.Lastly, 23.1% (n = 6) of patients who developed a hematoma were on home antithrombotics (group 1c) compared with 76.9% (n = 20) of patients with no antithrombotics (group 1d). There were statistically significant differences in transfusion rates (50% vs 0%, P = 0.001) between groups 1c and 1d, respectively. Differences in hematoma volume (330 vs 169.3 mL, P = 0.078) and reconstructive failure (33.3% vs 5%, P = 0.057) approached significance between both groups., Conclusions: Hematoma after TE-IBR should be monitored closely, as it may play a role in jeopardizing reconstruction success. Patients on home antithrombotic medication may be at increased risk of larger-volume hematomas and reconstruction failure. Plastic surgeons should consider aggressive surgical evacuation of postoperative TE-IBR hematomas to reduce subsequent complications and reoperations, thus optimizing reconstructive outcomes.
- Published
- 2020
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27. Acellular Dermal Matrix Sterility: Does It Affect Microbial and Clinical Outcomes Following Implantation?
- Author
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Klein GM, Singh G, Marquez J, Gebre M, Barry R, Huston TL, Ganz JC, Khan SU, Dagum AB, and Bui DT
- Abstract
The use of acellular dermal matrices (ADMs) in breast reconstruction is a controversial topic. Recent literature has investigated the effects of ADM sterilization on infectious complications, although with varying conclusions. Previous work by our group showed no difference between aseptic and sterilized products immediately out of the package. In this study, we investigate the microbiologic profiles of these agents after implantation., Methods: In this prospective study, we cultured samples of ADM previously implanted during the first stage of tissue expander-based immediate breast reconstruction. A 1 cm2 sample was excised during the stage II expander-implant exchange procedure, and samples were incubated for 48 hours in tryptic soy broth. Samples with growth were further cultured on tryptic soy broth and blood agar plates. Patient records were also analyzed, to determine if ADM sterilization and microbial growth were correlated with infectious complications., Results: In total, 51 samples of ADM were collected from 32 patients. Six samples were from aseptic ADM (AlloDerm), 27 samples were from ADM sterilized to 10-3 (AlloDerm Ready-to-Use), and 18 samples were from products sterilized to 10-6 (AlloMax). No samples demonstrated bacterial growth. Only 5 patients experienced postoperative complications, of whom only 1 patient was infectious in nature. We failed to demonstrate a statistically significant correlation between sterility and postoperative complications., Conclusions: Our findings showed no difference in microbial presence and clinical outcomes when comparing ADM sterility. Furthermore, no samples demonstrated growth in culture. Our study brings into question the necessity for terminal sterilization in these products., (Copyright © 2019 The Authors. Published by Wolters Kluwer Health, Inc. on behalf of The American Society of Plastic Surgeons.)
- Published
- 2019
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28. Digital Image Speckle Correlation to Optimize Botulinum Toxin Type A Injection: A Prospective, Randomized, Crossover Trial.
- Author
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Verma R, Klein G, Xu Y, Rafailovich M, Gilbert Fernandez JJ, Khan SU, Bui DT, and Dagum AB
- Subjects
- Aged, Cross-Over Studies, Diagnostic Imaging methods, Esthetics, Female, Humans, Injections, Subcutaneous, Middle Aged, Patient Satisfaction statistics & numerical data, Prospective Studies, Risk Assessment, Single-Blind Method, Treatment Outcome, Botulinum Toxins, Type A administration & dosage, Forehead diagnostic imaging, Image Interpretation, Computer-Assisted, Skin Aging drug effects
- Abstract
Background: Historically, physicians have relied on their subjective measures when determining the site and dosages for botulinum toxin type A injections. Digital image speckle correlation is a technology that tracks pore movement from rest to maximal exertion, allowing for the determination of the optimal sites of injection. In this prospective, randomized, crossover trial, the efficacy of using digital image speckle correlation was compared to physician assessment in choosing botulinum toxin type A injection sites., Methods: Ten female patients were analyzed in this blinded crossover study. Subjects were randomized to either injections based on digital image speckle correlation analysis or injections based on the 2004 facial aesthetics consensus recommendations. All patients received 20 U of botulinum toxin type A in the glabellar region and were crossed over and reinjected after 6 months. Follow-up was completed with the Facial Line Outcomes 11-item survey and repeated imaging with digital image speckle correlation, to measure patient satisfaction and degree of paralysis, respectively. Statistical comparison was completed by means of matched sample t test., Results: On average, the digital image speckle correlation analysis provided 4.8 injection sites, whereas the practitioner chose five injections sites. Patients receiving digital image-directed injections had higher rates of satisfaction on the Facial Line Outcomes instrument (p = 0.0003) and a larger degree of paralysis (p = 0.003). Furthermore, muscle function returned to normal later in patients injected with digital image speckle correlation (17.9 weeks versus 20 weeks; p = 0.03)., Conclusions: This study demonstrates the benefits of using digital image speckle correlation in determining optimal botulinum toxin type A injection location. Digital analysis allows practitioners to better treat facial rhytides by eliminating subjective decisions regarding dose and site of injection., Clinical Question/level of Evidence: Therapeutic, II.
- Published
- 2019
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29. Development of In Vitro Bioengineered Vascular Grafts for Microsurgery and Vascular Surgery Applications.
- Author
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Singh G, Cordero J, Wiles B, Tembelis MN, Liang KL, Rafailovich M, Simon M, Khan SU, Bui DT, and Dagum AB
- Abstract
Introduction: The use of vascular grafts is continuing to rise due to the increasing prevalence of coronary artery bypass grafting and microvascular flap-based tissue reconstructions. The current options of using native vessels (saphenous vein) or the synthetic grafts (Dacron) have been unable to manage current needs. In this study, we employed an original tissue engineering approach to develop a multi-layered vascular graft that has the potential to address some of the limitations of the existing grafts., Materials and Methods: Biomaterials, gelatin and fibrin, were used to develop a two-layered vascular graft. The graft was seeded with endothelial cells and imaged using confocal microscopy. The graft's architecture and its mechanical properties were also characterized using histology, Scanning Electron Microscopy and rheological studies., Results: Our methodology resulted in the development of a vascular graft with precise spatial localization of the two layers. The endothelial cells fully covered the lumen of the developed vascular graft, thus providing a non-thrombogenic surface. The elastic modulus of the biomaterials employed in this graft was found to be 5.186 KPa, paralleling that of internal mammary artery. The burst pressure of this graft was also measured and was found close to that of the saphenous vein (~2000 mm Hg)., Conclusions: We were successfully able to employ a unique method to synthesize a multi-layered vascularized graft having adequate biological and mechanical properties. Studies are ongoing involving implantation of this developed vascular graft in the rat femoral artery and characterization of parameters such as vascular remodeling and patency.
- Published
- 2019
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30. Collagenase Clostridium histolyticum for the Treatment of Distal Interphalangeal Joint Contractures in Dupuytren Disease.
- Author
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Fei TT, Chernoff E, Monacco NA, Komatsu DE, Muhlrad S, Sampson SP, Hurst LC, and Dagum AB
- Subjects
- Aged, Arthrometry, Articular, Female, Follow-Up Studies, Humans, Injections, Intra-Articular, Male, Retrospective Studies, Clostridium histolyticum, Dupuytren Contracture therapy, Finger Joint, Microbial Collagenase therapeutic use
- Abstract
Purpose: To explore the efficacy of injectable collagenase Clostridium histolyticum (CCH) in distal interphalangeal (DIP) joint contractures in Dupuytren disease., Methods: A retrospective review was conducted for patients with DIP joint contractures treated with CCH. Baseline contracture and posttreatment residual contracture were recorded. The primary end point was achievement of 0° to 5° of residual contracture 30 days postmanipulation. Recurrence and adverse events are also reported., Results: Twenty-one patients were treated with collagenase for DIP joint contractures and had a mean follow-up of 2.6 months. Seventeen of 21 patients reached the primary end point of less than 5° residual flexion contracture. Eleven of 21 patients experienced an adverse event, most commonly bruising and edema. No serious complications such as neurovascular injuries or tendon ruptures were recorded. Two patients had recurrence of disease., Conclusions: Injection with CCH is an option for the treatment of DIP joint contractures in Dupuytren disease., Type of Study/level of Evidence: Therapeutic IV., (Copyright © 2019 American Society for Surgery of the Hand. Published by Elsevier Inc. All rights reserved.)
- Published
- 2019
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31. Comparison of the Basal View and a Previously Standardized Cleft Lip Rating Scale.
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Klein GM, Dhawan A, Laskowski RA, Peredo AL, Kelly R, Gelfand MA, Khan SU, Bui DT, and Dagum AB
- Subjects
- Adolescent, Child, Child, Preschool, Cleft Lip ethnology, Female, Humans, Male, Photography, Reproducibility of Results, Treatment Outcome, Attitude of Health Personnel, Cleft Lip surgery, Esthetics, Outcome Assessment, Health Care
- Abstract
Objectives: Numerous scales assessing the aesthetics of cleft lip repair exist. Most, including the Asher-McDade scale, use frontal and lateral views, while neglecting a basal view. We believe this view is important for properly assessing the aesthetics of repair. In this study, we evaluate the basal view in comparison to the Asher-McDade scale., Methods: This scale was based on progressive columellar shortening and alar flaring/slumping. A panel of 4 plastic surgeons applied the basal and Asher-McDade scales to pictures of patients with repaired unilateral cleft lip in 56 multiethnic participants aged 5 years to 18 years; images were scored from 1 to 5 (best). Statistical analysis was done via Spearman correlation., Results: Scores from plastic surgeons correlated strongly for each view. There was moderate correlation for the basal view with both nasal form and deviation scores ( P < .05). As expected, there were no strong correlations between the basal view and vermillion border or profile., Discussion: The Asher-McDade scale has been used to evaluate cleft lift repairs but is limited due to its subjective nature. The basal view scale grades these repairs by using a scale of progressive columellar shortening and alar flaring/slumping, which provides an opportunity for quantification and standardization. Our results show that the basal view correlates with the Asher-McDade scale among raters, thus providing an objective and validated measure of cleft lip repair.
- Published
- 2018
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32. The Delay Phenomenon: Is One Surgical Delay Technique Superior?
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Gersch RP, Fourman MS, Dracea C, Bui DT, and Dagum AB
- Abstract
Background: Surgical delay remains a common method for improving flap survival. However, the optimal surgical technique has not been determined. In this article, we compare flap perfusion, viable surface area, and flap contraction of 2 surgical delay techniques., Methods: Male Sprague-Dawley rats were divided into 3 groups. In the incisional surgical delay group (n = 9), a 9 × 3 cm dorsal flap was incised on 3 sides without undermining, leaving a cranial pedicle. In the bipedicle surgical delay group (BSD, n = 9), a 9 × 3 cm dorsal flap was incised laterally and undermined, leaving cranial and caudal pedicles. Control group (n = 16) animals did not undergo a delay procedure. Ten days following surgical delay, all flaps for all groups were raised, leaving a cranial pedicle. A silicone sheet separated the flap and the wound bed. On postoperative day (POD) 7, viable surface area was determined clinically. Contraction compared to POD 0 was measured with ImageJ software. Perfusion was measured with Laser Doppler Imaging. The Kruskal-Wallis with Dunn's multiple comparisons test was performed for group comparisons., Results: BSD preserved significantly more viable surface area on POD 7 (13.7 ± 4.5 cm
2 ) than Control (8.7 ± 1.8 cm2 ; P = 0.01). BSD also showed significantly less contraction (21.0% ± 13.5%) than Control (45.9% ± 19.7%; P = 0.0045). BSD and incisional surgical delay showed significantly increased perfusion compared with Control on POD 0 ( P = 0.02 and 0.049, respectively), which persisted on POD 3. This trend resolved by POD 7., Conclusion: BSD showed improved early perfusion, increased viable surface area, and reduced contraction compared to control, suggesting that BSD is the superior flap design for preclinical modeling.- Published
- 2017
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33. Infectious Loss of Tissue Expanders in Breast Reconstruction: Are We Treating the Right Organisms?
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Klein GM, Phillips BT, Dagum AB, Bui DT, and Khan SU
- Subjects
- Adult, Aged, Aged, 80 and over, Breast Implantation methods, Device Removal, Female, Gram-Negative Bacterial Infections diagnosis, Gram-Negative Bacterial Infections epidemiology, Gram-Negative Bacterial Infections surgery, Gram-Positive Bacterial Infections diagnosis, Gram-Positive Bacterial Infections epidemiology, Gram-Positive Bacterial Infections surgery, Humans, Middle Aged, Prosthesis-Related Infections diagnosis, Prosthesis-Related Infections epidemiology, Prosthesis-Related Infections surgery, Retrospective Studies, Tissue Expansion methods, Breast Implantation instrumentation, Breast Implants adverse effects, Gram-Negative Bacterial Infections etiology, Gram-Positive Bacterial Infections etiology, Prosthesis-Related Infections microbiology, Tissue Expansion instrumentation, Tissue Expansion Devices adverse effects
- Abstract
Background: Postoperative infections following tissue expander-based breast reconstruction represent a significant threat to the reconstructive process. Studies have found the incidence to be as high as 29%. There has been abundant research into the risk factors associated with these infections, although very few studies have focused on the causative organisms. The purpose of this study was to investigate the bacterial flora associated with tissue expander infections after breast reconstruction., Methods: A retrospective analysis of all patients who underwent tissue expander-based breast reconstruction at our institution between February 2010 and April 2013 was conducted. The medical records were reviewed for demographic information, medical history, operative technique, postoperative course, and culture results. Descriptive data analysis was then performed., Results: A total of 56 tissue expander infections were identified in 49 patients during the study period. 41.1% of the cultures grew gram-positive organisms, whereas 28.6% grew gram-negative species. The 2 most common organisms were Staphylococcus aureus (17.9%) and Staphylococcus epidermidis (14.3%). Pseudomonas aeruginosa was the most frequent gram-negative species and was also the third most frequent organism cultured (10.9%)., Discussion: Due to the high rate of infection in breast reconstruction patients, adequate perioperative prophylaxis is necessary. The surgeon must also be prepared to treat patients who may return with infection postoperatively. Although the majority of our infections were secondary to normal skin flora, a significant proportion were caused by gram-negative species. Given these results, the empiric antibiotic of choice for postoperative infections should be reconsidered to cover for these various organisms.
- Published
- 2017
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34. Is Sterile Better Than Aseptic? Comparing the Microbiology of Acellular Dermal Matrices.
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Klein GM, Nasser AE, Phillips BT, Gersch RP, Fourman MS, Lilo SE, Fritz JR, Khan SU, Dagum AB, and Bui DT
- Abstract
Introduction: Postoperative infections are a major complication associated with tissue-expander-based breast reconstruction. The use of acellular dermal matrix (ADM) in this surgery has been identified as a potential reservoir of infection, prompting the development of sterile ADM. Although aseptic and sterile ADMs have been investigated, no study has focused on the occurrence and clinical outcome of bacterial colonization before implantation., Methods: Samples of aseptic AlloDerm, sterile Ready-To-Use AlloDerm, and AlloMax were taken before implantation. These samples were incubated in Tryptic soy broth overnight before being streaked on Trypticase soy agar, MacConkey agar, and 5% blood agar plates for culture and incubated for 48 hours. Culture results were cross-referenced with patient outcomes for 1 year postoperatively., Results: A total of 92 samples of ADM were collected from 63 patients. There were 15 cases of postoperative surgical site infection (16.3%). Only 1 sample of ADM (AlloMax) showed growth of Escherichia coli, which was likely a result of contamination. That patient did not develop any infectious sequelae. Patient outcomes showed no difference in the incidence of seroma or infection between sterile and aseptic ADMs., Conclusions: This study evaluates the microbiology of acellular dermal matrices before use in breast reconstruction. No difference was found in the preoperative bacterial load of either aseptic or sterile ADM. No significant difference was noted in infection or seroma formation. Given these results, we believe aseptic processing used on ADMs is equivalent to sterile processing in our patient cohort in terms of clinical infection and seroma occurrence postoperatively.
- Published
- 2016
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35. A prospective analysis of physical examination findings in the diagnosis of facial fractures: Determining predictive value.
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Timashpolsky A, Dagum AB, Sayeed SM, Romeiser JL, Rosenfeld EA, and Conkling N
- Abstract
Background: There are >150,000 patient visits per year to emergency rooms for facial trauma. The reliability of a computed tomography (CT) scan has made it the primary modality for diagnosing facial skeletal injury, with the physical examination playing more a cursory role. Knowing the predictive value of physical findings in facial skeletal injuries may enable more appropriate use of imaging and health care resources., Objective: A blinded prospective study was undertaken to assess the predictive value of physical examination findings in detecting maxillofacial fracture in trauma patients, and in determining whether a patient will require surgical intervention., Methods: Over a four-month period, the authors' team examined patients admitted with facial trauma to the emergency department of their hospital. The evaluating physician completed a standardized physical examination evaluation form indicating the physical findings. Corresponding CT scans and surgical records were then reviewed, and the results recorded by a plastic surgeon who was blinded to the results of the physical examination., Results: A total of 57 patients met the inclusion criteria; there were 44 male and 13 female patients. The sensitivity, specificity, positive predictive value and negative predictive value of grouped physical examination findings were determined in major areas. In further analysis, specific examination findings with n≥9 (15%) were also reported., Conclusions: The data demonstrated a high negative predictive value of at least 90% for orbital floor, zygomatic, mandibular and nasal bone fractures compared with CT scan. Furthermore, none of the patients who did not have a physical examination finding for a particular facial fracture required surgery for that fracture. Thus, the instrument performed well at ruling out fractures in these areas when there were none. Ultimately, these results may help reduce unnecessary radiation and costly imaging in patients with facial trauma without facial fractures.
- Published
- 2016
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36. Are Prophylactic Postoperative Antibiotics Necessary for Immediate Breast Reconstruction? Results of a Prospective Randomized Clinical Trial.
- Author
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Phillips BT, Fourman MS, Bishawi M, Zegers M, O'Hea BJ, Ganz JC, Huston TL, Dagum AB, Khan SU, and Bui DT
- Subjects
- Administration, Oral, Adolescent, Adult, Aged, Aged, 80 and over, Anti-Bacterial Agents therapeutic use, Cefazolin therapeutic use, Clindamycin therapeutic use, Drug Administration Schedule, Female, Humans, Infusions, Intravenous, Mastectomy, Middle Aged, Prospective Studies, Surgical Wound Infection diagnosis, Surgical Wound Infection epidemiology, Treatment Outcome, Young Adult, Anti-Bacterial Agents administration & dosage, Antibiotic Prophylaxis methods, Cefazolin administration & dosage, Clindamycin administration & dosage, Mammaplasty methods, Postoperative Care methods, Surgical Wound Infection prevention & control
- Abstract
Background: Closed-suction drains, implants, and acellular dermal matrix (ADM) are routinely used in tissue expander-based immediate breast reconstruction (TE-IBR). Each of these factors is thought to increase the potential for surgical site infection (SSI). Although CDC guidelines recommend only 24 hours of antibiotic prophylaxis after TE-IBR, current clinical practices vary significantly. This study evaluated the difference in SSI between 2 different prophylactic antibiotic durations., Study Design: A noninferiority randomized controlled trial was designed in which TE-IBR patients received antibiotics either 24 hours postoperatively or until drain removal. The primary outcome was SSI, as defined by CDC criteria. Operative and postoperative protocols were standardized. Secondary endpoints included clinical outcomes up to 1 year and all implant loss, or reoperation., Results: There were 112 TE-IBR patients (180 breasts) using ADM who were randomized into 2 study arms, with 62 patients in the 24-hour group and 50 in the extended group. Surgical site infection was diagnosed in 12 patients in the 24-hour group and 11 in the extended group (19.4% vs 22.0%, p = 0.82). The extended group had 7 patients who required IV antibiotics and an overall implant loss in 7 patients (14.0%). The 24-hour group had 4 patients who required IV antibiotics, with 3 requiring removal (4.8%). Patients with diabetes, postoperative seroma, or wound dehiscence were all more likely to develop SSI (p < 0.02)., Conclusions: In a randomized controlled noninferiority trial, 24 hours of antibiotics is equivalent to extended oral antibiotics for SSI in TE-IBR patients. Additional multicenter trials will further assess this important aspect of TE-IBR postoperative care., (Copyright © 2016 American College of Surgeons. Published by Elsevier Inc. All rights reserved.)
- Published
- 2016
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37. Utilizing Indocyanine Green Dye Angiography to Detect Simulated Flap Venous Congestion in a Novel Experimental Rat Model.
- Author
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Nasser A, Fourman MS, Gersch RP, Phillips BT, Hsi HK, Khan SU, Gelfand MA, Dagum AB, and Bui DT
- Subjects
- Animals, Disease Models, Animal, Femoral Vein diagnostic imaging, Graft Rejection diagnostic imaging, Hyperemia diagnostic imaging, Hyperemia physiopathology, Male, Random Allocation, Rats, Regional Blood Flow, Risk Assessment, Sensitivity and Specificity, Surgical Flaps blood supply, Angiography methods, Hindlimb blood supply, Indocyanine Green, Ischemia diagnostic imaging, Surgical Flaps adverse effects
- Abstract
Background: Venous congestion is a leading cause for free flap failure and still relies on clinical observation as the diagnostic gold standard. We sought to characterize blood flow in a variable venous congestion murine hind limb model using indocyanine green (ICG, SPY Pack, LifeCell, Branchburg, NJ) angiography., Methods: Male Sprague-Dawley rats (Charles River, Hudson, NY) underwent bilateral partial amputation at the inguinal ligament, leaving only the femoral vessels and femur intact. Complete unilateral venous occlusion was achieved via suture ligation, while partial occlusion was achieved by surrounding the femoral vein with a synthetic microtube to achieve 25, 75, 85, or 92% occlusion. Relative blood flow of occluded and control limbs was tracked with ICG angiography throughout a 90-minute time course., Results: ICG angiography detected statistically significant (p < 0.05) reductions in limb blood flow 1 and 2 minutes following ICG injection in the 100, 92, and 85% occluded limbs when compared with contralateral control limbs. Dynamic tracking using the slope of ICG inflow for 45 seconds postinjection reflected this same significant difference. No statistically significant change in limb blood flow or dye influx rate was observed in the 25 and 75% occlusion groups., Conclusions: ICG angiography can detect venous congestion in a rat lower extremity model reliably at occlusion rates ≥ 85%. This method may offer surgeons an intraoperative diagnostic tool to identify venous congestion at extremely early time points, allowing for immediate intervention. Further investigation and characterization is warranted in a larger animal model before clinical adaptation., (Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.)
- Published
- 2015
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38. AdVEGF-All6A+ Preconditioning of Murine Ischemic Skin Flaps Is Comparable to Surgical Delay.
- Author
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Gersch RP, Fourman MS, Phillips BT, Nasser A, McClain SA, Khan SU, Dagum AB, and Bui DT
- Abstract
Background: Surgical flap delay is commonly used in preconditioning reconstructive flaps to prevent necrosis. However, staged procedures are not ideal. Pharmacologic up-regulation of angiogenic and arteriogenic factors before flap elevation poses a nonsurgical approach to improve flap survival., Methods: Male Sprague Dawley rats were divided into control (n = 16), surgical delay (Delay), AdNull, AdEgr-1, and AdVEGF (n ≥ 9/group) groups. Delay rats had a 9 cm × 3 cm cranial based pedicle skin flap incised 10 days prior to elevation. Adenoviral groups received 28 intradermal injections (10(9) pu/animal total) throughout the distal two thirds of the flap 1 week prior to elevation. At postoperative day (POD) 0 flaps were elevated and silicone sheeting was placed between flap and wound bed. Perfusion analysis in arbitrary perfusion units of the ischemic middle third of the flap using laser Doppler imaging was conducted preoperatively and on POD 0, 3, and 7. Clinical and histopathologic assessments of the skin flaps were performed on POD 7., Results: AdVEGF (50.8 ± 10.9 APU) and AdEgr-1 (39.3 ± 10.6 APU) perfusion levels were significantly higher than controls (16.5 ± 4.2 APU) on POD 7. Delay models were equivalent to controls (25.9 ± 6.8 APU). AdVEGF and Delay animals showed significantly more viable surface area on POD 7 (14.4 ± 1.3 cm(2), P < 0.01 and 12.4 ± 1.2 cm(2), P < 0.05, respectively) compared with Controls (8.7 ± 0.7 cm(2))., Conclusions: AdVEGF preconditioning resulted in flap survival comparable to surgical delay. Adenoviral preconditioning maintained perfusion levels postoperatively while surgical delay did not.
- Published
- 2015
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39. ICG angiography predicts burn scarring within 48 h of injury in a porcine vertical progression burn model.
- Author
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Fourman MS, McKenna P, Phillips BT, Crawford L, Romanelli F, Lin F, McClain SA, Khan SU, Dagum AB, Singer AJ, and Clark RA
- Subjects
- Angiography, Animals, Burns complications, Cicatrix etiology, Disease Progression, Female, Laser-Doppler Flowmetry, Linear Models, Optical Imaging, Pilot Projects, Regional Blood Flow, Sus scrofa, Swine, Burns pathology, Cicatrix pathology, Coloring Agents, Indocyanine Green, Skin blood supply
- Abstract
The current standard of care in determining the need to excise and graft a burn remains with the burn surgeon, whose clinical judgment is often variable. Prior work suggests that minimally invasive perfusion technologies are useful in burn prognostication. Here we test the predictive capabilities of Laser Doppler Imaging (LDI) and indocyanine green dye (ICG) angiography in the prediction of burn scarring 28 days after injury using a previously validated porcine burn model that shows vertical progression injury. Twelve female Yorkshire swine were burned using a 2.5 × 2.5 cm metal bar at variable temperature and application times to create distinct burn depths. Six animals (48 injuries total) each were analyzed with LDI or ICG angiography at 1, 24, 48, and 72 h following injury. A linear regression was then performed correlating perfusion measurements against wound contraction at 28 days after injury. ICG angiography showed a peak linear correlate (r(2)) of .63 (95% CI .34 to .92) at 48 h after burn. This was significantly different from the LDI linear regression (p < .05), which was measured at r(2) of .20 (95% CI .02 to .39). ICG angiography linear regression was superior to LDI at all timepoints. Findings suggest that ICG angiography may have significant potential in the prediction of long-term burn outcomes., (Copyright © 2014 Elsevier Ltd and ISBI. All rights reserved.)
- Published
- 2015
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40. Comparison of Laser Doppler and Laser-Assisted Indocyanine Green Angiography Prediction of Flap Survival in a Novel Modification of the McFarlane Flap.
- Author
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Fourman MS, Gersch RP, Phillips BT, Nasser A, Rivara A, Verma R, Dagum AB, Rosengart TK, and Bui DT
- Subjects
- Animals, Graft Survival, Laser-Doppler Flowmetry, Lasers, Male, Prognosis, Rats, Rats, Sprague-Dawley, Silicones, Angiography methods, Coloring Agents, Indocyanine Green, Surgical Flaps blood supply
- Abstract
Background: The McFarlane rat ischemic dorsal skin flap model has been commonly used for clinical vector studies, as well as the testing of noninvasive diagnostics. However, variability of this model secondary to flap contact with the wound bed has led many to question its validity. Here we present a novel modification to the McFarlane skin flap using sterile silicone. We also use this model to test the prognostic efficacy of laser-assisted indocyanine green (ICG) angiography and laser Doppler imaging (LDI)., Methodology: A 3 × 9-cm dorsal skin flap with a cranially based pedicle was created, centered 1 cm distal to the scapulae. The flap was undermined, and in one of the 2 groups, a sterile silicone sheet was placed onto the wound bed. All flaps were then reapproximated with sutures 1-cm intervals. Clinical assessment and perfusion imaging was performed immediately postoperative, and at 24, 48, and 72 hours postsurgery. Postoperative day 7 clinical assessment was obtained before euthanasia., Results: A comparative study using silicone blocked versus unblocked models (n = 6 per group) showed that, clinically, both models had equivalent flap survival [8.5 (0.913) vs 9.5 (1.01) cm]. However, a statistically significant increase in perfusion in the mid-third of unblocked models was observed on POD3 [20.28% (2.7%) vs blocked 13.45% (2.5%), P < 0.05], with a similar increase in the distal third on POD7 [18.73% (2.064%) vs 10.91% (4.19%), P < 0.05]. A prognostic study comparing LDI and ICG angiography prediction of POD7 survival at early time points (n = 10) found that LDI underpredicted flap survival at early time points [84.2% (12.03%) on POD0, 87.35% (16.11%) on POD1]. In contrast, ICG was more proficient [100.1% (10.1%) on POD0]., Conclusions: We present a modification of the McFarlane skin flap model that results in similar clinical results, but with a noted reduction in perfusion inconsistencies noted in unblocked models. The ICG angiography is superior to LDI in predicting POD7 flap necrosis within the first 48 hours postinjury. Future work will focus on histologic validation of our model, and vector efficacy testing.
- Published
- 2015
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41. Comparing quantitative values of two generations of laser-assisted indocyanine green dye angiography systems: can we predict necrosis?
- Author
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Phillips BT, Fourman MS, Rivara A, Dagum AB, Huston TL, Ganz JC, Bui DT, and Khan SU
- Abstract
Objective: Several devices exist today to assist the intraoperative determination of skin flap perfusion. Laser-Assisted Indocyanine Green Dye Angiography (LAICGA) has been shown to accurately predict mastectomy skin flap necrosis using quantitative perfusion values. The laser properties of the latest LAICGA device (SPY Elite) differ significantly from its predecessor system (SPY 2001), preventing direct translation of previous published data. The purpose of this study was to establish a mathematical relationship of perfusion values between these 2 devices., Methods: Breast reconstruction patients were prospectively enrolled into a clinical trial where skin flap evaluation and excision was based on quantitative SPY Q values previously established in the literature. Initial study patients underwent mastectomy skin flap evaluation using both SPY systems simultaneously. Absolute perfusion unit (APU) values at identical locations on the breast were then compared graphically., Results: 210 data points were identified on the same patients (n = 4) using both SPY systems. A linear relationship (y = 2.9883x + 12.726) was identified with a high level or correlation (R(2) = 0.744). Previously published values using SPY 2001 (APU 3.7) provided a value of 23.8 APU on the SPY Elite. In addition, postoperative necrosis in these patients correlated to regions of skin identified with the SPY Elite with APU less than 23.8., Conclusion: Intraoperative comparison of LAICGA systems has provided direct correlation of perfusion values predictive of necrosis that were previously established in the literature. An APU value of 3.7 from the SPY 2001 correlates to a SPY Elite APU value of 23.8.
- Published
- 2014
42. Modeling fade patterns of nipple areola complex tattoos following breast reconstruction.
- Author
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Levites HA, Fourman MS, Phillips BT, Fromm IM, Khan SU, Dagum AB, and Bui DT
- Subjects
- Adult, Aged, Color, Female, Follow-Up Studies, Humans, Middle Aged, Models, Statistical, Outcome Assessment, Health Care, Photography, Retrospective Studies, Single-Blind Method, Time Factors, Mammaplasty, Nipples, Tattooing
- Abstract
Background: Nipple-areolar complex (NAC) tattoos are an effective cosmetic solution for creating a finished look following breast reconstruction procedures. NAC tattoos are prone to significant fading, leading patients to seek revisions. This study was designed to quantify changes in NAC tattoo appearance over time., Methods: A total of 71 images of 39 patients were analyzed for NAC tattoo color and shape by 5 blinded medical student graders using a customized scoring system. Subsequently, each image was analyzed using ColorPic software (Iconico, New York, NY). Red/green/blue and hue/saturation/value color parameters were collected. Color quantities were normalized to the individual patient's skin tone to control for variability in lighting. Spearman correlations and nonlinear regressions were calculated utilizing GraphPad Prism 6.0 (GraphPad, La Jolla, CA)., Results: The length of time after tattoo placement inversely correlated with color score (P < 0.0001) and shape score (P = 0.0007). The time following tattoo placement was also inversely correlated with all quantitative color parameters. Each color parameter fit a 1-phase exponential decay model., Conclusions: The decline in qualitative color and shape score agrees with clinical experience of tattoo quality declining over time. The color qualities of the tattoo approach those of the patient's skin over time, ultimately reaching a plateau. This can be modeled using a 1-phase decay equation. In practice, tattoo colors may be selected that compensate for the predictable changes that will occur. The results of this study will help optimize tattoo color and may alleviate the need for NAC tattoo revisions.
- Published
- 2014
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43. A systematic review of infection rates and associated antibiotic duration in acellular dermal matrix breast reconstruction.
- Author
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Phillips BT, Bishawi M, Dagum AB, Bui DT, and Khan SU
- Abstract
Introduction: Reported infection rates in breast reconstruction with acellular dermal matrix (ADM) can exceed 31%. Prophylactic antibiotics remain controversial due to the absence of evidence-based literature. The purpose of this study was to examine published antibiotic regimens and their associated infection rates in this population., Methods: Systematic electronic searches were performed in PubMed, OVID, and the Cochrane databases for studies that reported on prophylactic antibiotic use and infection in patients undergoing ADM breast reconstruction. Two independent authors reviewed studies between 1970 and 2012 for inclusion and data extraction., Results: A total of 863 studies were identified and abstracts reviewed. A total of 24 articles were included, with 2148 patients and 3189 ADM reconstructions. Mean infection rates varied between 0% and 31.25%, with a combined average of 11.59%. When comparing antibiotic protocols of less than 24 hours and more than 24 hours, the average infection rate was 2.48% and 13.21%, respectively., Conclusion: The current literature lacks consensus on the necessary duration for postoperative antibiotic prophylaxis following breast reconstruction. The potential increased risk of infection associated with ADM remains controversial. Because of the lack of supportive evidence, we do not recommend prolonged postoperative antibiotics in ADM breast reconstruction., Level of Evidence: Therapeutic level III evidence.
- Published
- 2014
44. Sternal wound reconstruction with falciform and omental flaps for chronic sternal osteomyelitis.
- Author
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Levites HA, Kaymakcalan OE, Phillips BT, Bilfinger TV, and Dagum AB
- Published
- 2014
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45. Laser-assisted indocyanine green dye angiography accurately predicts the split-thickness graft timing of integra artificial dermis.
- Author
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Fourman MS, Phillips BT, Fritz JR, Conkling N, McClain SA, Simon M, and Dagum AB
- Subjects
- Animals, Female, Neovascularization, Physiologic, Random Allocation, Skin diagnostic imaging, Skin injuries, Swine, Treatment Outcome, Ultrasonography, Doppler, Wound Healing, Chondroitin Sulfates, Collagen, Fluorescent Dyes, Indocyanine Green, Optical Imaging methods, Skin blood supply, Skin Transplantation methods, Skin, Artificial
- Abstract
Background: The use of an artificial dermal substitute such as Integra-a bilaminate combination of thin silicone and cross-linked bovine tendon collagen and chondroitin-6-sulfate-has become a popular method to address large surface area wounds or smaller, complex wounds devoid of a vascular bed. The incorporation of Integra depends on a vascular wound bed or periphery and can take 4 weeks or longer to occur. If the Integra has not fully incorporated at the time of placement of the split-thickness graft, complete graft loss may result. The availability of a minimally invasive method to assess the incorporation of Integra would be of great value., Methods: Two 5 × 10-cm paraspinal full-thickness wounds were created on 3 female swine. Wounds were randomly assigned full-thickness skin graft or Integra (Plainsboro, NJ) treatment. Both types of grafts were placed after the application of fibrin glue (Tisseel, Deerfield, Ill) to the wound bed. Laser Doppler imaging (LDI) (Moor), indocyanine green dye (ICG) angiography (LifeCell SPY), and clinical scoring were performed weekly for a period of 8 weeks after grafting. At 4 weeks, the silicone layer of the Integra was removed, and a culture of autologous keratinocytes was applied. A 4-mm punch biopsy sample of each graft was taken 1, 2, 4, 6, 7, and 8 weeks postoperatively for histologic analysis., Results: Both ICG angiography and LDI perfusion measurements noted an increase in perfusion at the Integra graft site that peaked 3 weeks after grafting, corresponding with the start of neovascularization and the optimal time for the application of a split-thickness skin graft. indocyanine green dye angiography measurements exhibit greater reproducibility between animals at late time points as compared with LDI. This decrease in LDI precision is directly related to increases in scar tissue thickness of greater than 5 mm as determined via histologic analysis and corresponds with the accepted maximum penetration depth of the LDI laser., Conclusions: Indocyanine green dye angiography may provide valuable information as to graft integrity and split-thickness skin graft timing at late time points. Range of LDI seems to be insufficient for split-thickness graft timing or late time point accuracy. Future exploration of ICG angiography potential will involve tracking Integra graft delay in porcine models.
- Published
- 2014
- Full Text
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46. Indocyanine green dye angiography accurately predicts survival in the zone of ischemia in a burn comb model.
- Author
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Fourman MS, Phillips BT, Crawford L, McClain SA, Lin F, Thode HC Jr, Dagum AB, Singer AJ, and Clark RA
- Subjects
- Angiography, Animals, Coloring Agents, Disease Models, Animal, Female, Indocyanine Green, Laser-Doppler Flowmetry, Skin diagnostic imaging, Skin injuries, Swine, Burns diagnosis, Ischemia diagnosis, Perfusion Imaging methods, Skin blood supply, Tissue Survival
- Abstract
Introduction: Surgical evaluation of burn depth is performed via clinical observation, with only moderate reliability. While perfusion analysis has been proposed to enhance accuracy, no perfusion study has attempted to predict burn extension into the area of ischemia surrounding the original insult. We examined whether laser Doppler imaging (LDI) and indocyanine green (ICG) angiography predicted survival in the zone of ischemia in a porcine hot comb burn model., Methodology: Six full-thickness wounds were created on 5 female Yorkshire swine using a validated porcine hot comb burn model. 4 full-thickness burns were created separated by 3 unburned interspaces that represent the zone of ischemia. The interspaces between each comb burn were monitored using LDI and ICG Angiography at 1, 4, 24, and 48 h after burn. Interspace survival was assessed via gross observation and blinded histological readings 7 days after injury., Results: ICG Angiographic assessments of burn perfusion were significantly different in viable vs. non-viable interspace perfusion at 1 h, 4 h, and 48 h. Temporal plotting of a trend-line derived from quantitative perfusion measurements rendered two distinct graphs, allowing for the derivation of a predictive algorithm to separate viable and non-viable interspaces. LDI revealed no such prognostic trend., Conclusion: Results from a validated porcine burn comb model suggest that ICG angiography has significant potential in the prediction of burn progression early after burn. However, the full potential of this technology cannot be determined until completion of clinical trials., (Copyright © 2013 Elsevier Ltd and ISBI. All rights reserved.)
- Published
- 2014
- Full Text
- View/download PDF
47. An in vivo analysis of the effect and duration of treatment with botulinum toxin type A using digital image speckle correlation.
- Author
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Bhatnagar D, Conkling N, Rafailovich M, Phillips BT, Bui DT, Khan SU, and Dagum AB
- Subjects
- Adult, Female, Humans, Image Interpretation, Computer-Assisted methods, Injections, Intramuscular, Middle Aged, Neuromuscular Agents administration & dosage, Reproducibility of Results, Sensitivity and Specificity, Signal Processing, Computer-Assisted, Statistics as Topic, Subtraction Technique, Treatment Outcome, Botulinum Toxins, Type A administration & dosage, Dermoscopy methods, Facial Muscles anatomy & histology, Facial Muscles drug effects, Skin anatomy & histology, Skin drug effects, Skin Aging drug effects
- Abstract
Background: Use of Botulinum toxin type A (BTX-A) for facial wrinkles is well-documented, but current methods of subjective evaluation by clinicians and patients fail to objectively quantify the magnitude and duration of facial muscle paralysis., Objective: (a) Determine the locus of facial muscular tension; (b) Quantify and monitor muscular paralysis and subsequent return; (c) Continuously correlate the appearance of wrinkles and muscular tension using non-invasive digital image speckle correlation (DISC) to measure treatment efficacy; (d) Corroborate objective data with existing rating scales (subject global assessment and facial lines outcome-11)., Methods: Two sequential images of slight facial motion (frowning, raising eyebrows) are taken with a camera for n = 6 patients pre- and post-treatment at different time points up to 24 weeks. DISC processes the images to produce a vector map of muscular displacement to obtain spatially resolved information regarding facial tension., Results: We observed maximum paralysis (≥70%) at 2 weeks, and the rate of recovery varied widely ranging from 2 to 5 months, with two patients continuing to exhibit reduced contraction at 24 weeks. Vector analysis of pre-treatment contraction correctly predicted injection site and illustrated lines of maximum tension., Conclusions: Digital image speckle correlation can precisely track the degree of contraction of different muscle groups following BTX-A injection. It can help predict injection site, quantify muscle paralysis, and monitor the recovery following BTX-A injection. Results were found to be reproducible across six patients., (© 2013 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.)
- Published
- 2013
- Full Text
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48. A systematic review of antibiotic use and infection in breast reconstruction: what is the evidence?
- Author
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Phillips BT, Bishawi M, Dagum AB, Khan SU, and Bui DT
- Subjects
- Clinical Protocols, Drug Administration Schedule, Female, Humans, Prosthesis-Related Infections epidemiology, Surgical Wound Infection epidemiology, United States, Antibiotic Prophylaxis methods, Breast Implants adverse effects, Mammaplasty instrumentation, Mammaplasty methods, Preoperative Care methods, Prosthesis-Related Infections prevention & control, Surgical Wound Infection prevention & control
- Abstract
Background: The literature reports overall complication rates in breast reconstruction to be as high as 60 percent. Infection rates can exceed 20 percent, much higher than anticipated in clean elective surgery. There is no consensus among surgeons regarding the necessary duration of antibiotic prophylaxis, although the Centers for Disease Control and Prevention guidelines suggest only 24 hours. This systematic review examines antibiotic regimens and associated infection rates in breast reconstruction., Methods: Systematic electronic searches were performed in the PubMed, Ovid, and Cochrane databases using Medical Subject Headings terms for studies reporting antibiotic use and infection in all forms of breast reconstruction. Studies between 1970 and 2011 were reviewed. Included publications were required to report an antibiotic protocol and infection rate., Results: A total of 834 abstracts were identified, 81 of which met inclusion criteria and were included in the review. The overall reported infection rates in the included studies varied between 0 and 29 percent (average, 5.8 percent). When comparing combined patient cohorts receiving no antibiotics, less than 24 hours, and greater than 24 hours, the average infection rates were 14.4, 5.8, and 5.8 percent, respectively., Conclusions: There is no consensus on the necessary duration of antibiotic prophylaxis following breast reconstruction. No benefit was found in patients who received more than 24 hours of postoperative antibiotics. Standardized definitions for antibiotic regimens, unit of analysis reporting, and a new breast reconstruction surgical-site infection grading system are offered to improve standardized outcome documentation. Randomized controlled trials are warranted to best determine an optimal antibiotic regimen., Clinical Question/level of Evidence: Therapeutic, III.
- Published
- 2013
- Full Text
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49. Waltzing a facial artery musculomucosal flap to salvage a recurrent palatal fistula.
- Author
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Khanna S and Dagum AB
- Subjects
- Child, Humans, Male, Recurrence, Reoperation, Salvage Therapy, Cleft Palate surgery, Oral Fistula surgery, Plastic Surgery Procedures methods, Surgical Flaps blood supply
- Abstract
Closure of a palatal fistula, especially after multiple recurrences, remains a complex reconstructive problem. Herein, salvage of a recurrent palatal fistula after a facial artery musculomucosal flap (FAMM) flap by use of the traditional waltzing (jumping, migration) principle of tubed pedicle flaps is presented and the principles are discussed.
- Published
- 2012
- Full Text
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50. Subjective rating of cosmetic treatment with botulinum toxin type A: do existing measures demonstrate interobserver validity?
- Author
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Conkling N, Bishawi M, Phillips BT, Bui DT, Khan SU, and Dagum AB
- Subjects
- Adult, Botulinum Toxins, Type A administration & dosage, Female, Humans, Injections, Subcutaneous, Middle Aged, Neuromuscular Agents administration & dosage, Observer Variation, Photography, Physicians, Reproducibility of Results, Students, Medical, Botulinum Toxins, Type A pharmacology, Cosmetic Techniques, Neuromuscular Agents pharmacology, Outcome Assessment, Health Care methods, Skin Aging drug effects
- Abstract
Background: Throughout the literature, investigators have assessed the cosmetic efficacy of botulinum toxin (BT) treatment by using various subjective, qualitative measures, including the Facial Wrinkle Scale (FWS) and Subject Global Assessment (SGA). The widely used FWS and SGA attempt to quantify both the magnitude and duration of cosmetic outcomes as assessed by physician and patient. We sought to determine the interobserver validity of these scales relative to the level of observer experience., Methods: Botulinum toxin injections were performed to cosmetic effect in 6 patients recruited as part of an institutional review board-approved investigation. Subjects were photographed at rest and during animation (raising eyebrows, frowning, and blinking) before treatment and at 1, 2, 4 weeks, and monthly with follow-up to 6 months. Standardized digital 8″×10″ prints were scored using the FWS by board-certified plastic surgeons (n=5), general surgery residents (n=3), and medical students (n=4). Photographs at each time point were then compared to baseline using the SGA. Statistical analysis of observer data was performed using SPSS v19. Cohen κ (FWS) and Spearman ρ (SGA) were calculated for each pairwise comparison of observer data, with a conservative α of 0.01., Results: The FWS observer scores for the upper face overall were generally in agreement, with no negative κ values. The distribution, even among members of a single group, was highly variable. Agreement among plastic surgeons was the greatest (κ, 0.194-0.609). Resident concordance was moderate, and medical students displayed the most variable agreement. Spearman ρ for SGA scores was much higher, with surgeons approaching excellent agreement (κ, 0.443-0.992). In comparisons between members of different groups, agreement was unpredictable for both the FWS and SGA. Comparisons using scores from individual areas of the face were least concordant., Conclusions: The FWS and SGA represent the current standard of cosmetic outcomes measures; however, when subjected to scrutiny they display relatively unpredictable agreement even among plastic surgeons. Compared to the FWS, the SGA has a more acceptable user concordance, especially among plastic surgeons accustomed to using such scales. The interobserver variability of FWS and SGA scoring underlines the need to explore objective, quantitative cosmetic outcomes measures.
- Published
- 2012
- Full Text
- View/download PDF
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