75 results on '"Tsering D"'
Search Results
2. Remediation of lead toxicity with waste-bio materials from aqueous solutions in fixed-bed column using response surface methodology
- Author
-
Aanisa Manzoor Shah, Inayat Mustafa Khan, Zhenjie Du, Rehana Rasool, Raihana Habib Kant, Shakeel Mir, Tahir A. Sheikh, Fehim Jeelani Wani, M. Ayoub Bhat, Javid A. Bhat, M.H. Chesti, Mumtaz A. Ganie, Yasir Hanif Mir, Tsering Dolker, Sulaiman Ali Alharbi, Tahani Awad Alahmadi, and Shafeeq Ur Rahman
- Subjects
Waste biomaterials ,Human hair ,Fixed-bed column ,Lead adsorption ,Box-behnken design ,RSM ,Science (General) ,Q1-390 ,Social sciences (General) ,H1-99 - Abstract
Heavy metal ions pose significant risks to human health, pelagic, and several other life forms due to perniciousness, tendency to accumulate, and resistance to biodegradation. Waste bio-materials extend a budding alternative as low-cost adsorbent to address the removal of noxious pollutants from wastewater on account of being cost-effective and exhibiting exceptional adsorption capacities. The current exploration was accomplished to gauge the performance of raw and modified human hair concerning lead scavenging in a down-flow fixed bed column. The appraisal of column performance under varying operational parameters encompassing bed height (15–45 cm), influent metal ion concentration (60–140 mg L−1), and a solution flow rate (20–40 mL min−1) was performed by breakthrough curve analysis. The consequences acquired were evaluated using the Yoon Nelson, Thomas, Adam-Bohart, and Bed Depth Service Time (BDST) model. Among these employed models, Bed Depth Service Time (BDST) and Thomas models exhibited the highest R-squared value compared to the Yoon Nelson and Adam-Bohart's model for most cases. In addition, the optimization of lead adsorption was followed using the Box-Behnken design of response surface methodology (RSM). The optimal conditions (desirability-1.00) for achieving a goal of maximum percent removal of lead ions were marked to be a bed height of 42.79 cm, solution flow rate of 20.92 mL min−1, and an initial metal concentration of 139.51 mg L−1. Under these optimized conditions, the percent amputation of lead in a fixed bed was observed to be 82.31 %, while the results of the experiment performed approximately under these optimized conditions revealed a percent removal of 85.05 %, reflecting a reasonable conformity with values acquired through Box-Behnken design.
- Published
- 2024
- Full Text
- View/download PDF
3. S4A-16 SESSION 4A
- Author
-
Tsering, D., primary, Alexander, H., additional, Ayers, O., additional, Myseros, J. S., additional, Magge, S. N., additional, Oluigbo, C. O., additional, Boyajian, M. J., additional, Oh, A. K., additional, Rogers, G. F., additional, and Keating, R. F., additional
- Published
- 2019
- Full Text
- View/download PDF
4. S16-01 SESSION 16
- Author
-
Porras, A. R., primary, Tu, L., additional, Tsering, D., additional, Buck, G., additional, Mantilla-Rivas, E., additional, Keating, R., additional, Rogers, G., additional, and Linguraru, M. G., additional
- Published
- 2019
- Full Text
- View/download PDF
5. Correlates of cervical cancer screening among underserved women
- Author
-
Chankapa, Y., Pal, R., and Tsering, D.
- Subjects
Cancer -- Diagnosis ,Cervical cancer -- Diagnosis -- Demographic aspects ,Health - Abstract
Byline: Y. Chankapa, R. Pal, D. Tsering Background and Objectives: Substantial subgroups of Indian women, specifically those of ethnic minorities, had not been screened for cervical cancer or are not [...]
- Published
- 2011
6. An Investigation Into the Advisability of Translating Names of Tibetan Medicine Into Other Languages
- Author
-
Tsering D. Gonkatsang and Gawai Dorje
- Subjects
medicine.medical_specialty ,Complementary and alternative medicine ,Arts and Humanities (miscellaneous) ,Traditional medicine ,business.industry ,Alternative medicine ,medicine ,Medicine (miscellaneous) ,Research article ,Tibetan medicine ,business ,Linguistics ,Asian studies - Abstract
This research article primarily focuses on the author’s personal views on the history of translating names of Tibetan medicine into Chinese; the merits of translating (such terms) into other languages like Chinese; issues of improper translation in certain cases; considerations on the advisability of translating names of Tibetan medicine into Chinese and other languages; and the ways and means to resolve this issue.
- Published
- 2009
7. Materia Medica of Tibetan Medicine: Identification, Quality Check and Protection Measures
- Author
-
Tsering D. Gonkatsang and Dawa
- Subjects
Medical education ,medicine.medical_specialty ,Traditional medicine ,business.industry ,media_common.quotation_subject ,Materia medica ,Alternative medicine ,Medicine (miscellaneous) ,Subject (documents) ,Tibetan medicine ,Identification (information) ,Complementary and alternative medicine ,Arts and Humanities (miscellaneous) ,Medicine ,Discernment ,Quality check ,Quality (business) ,business ,media_common - Abstract
This paper discusses the relationship between Tibetan medical theory and practice with respect to the classification of Materia Medica and the discernment of quality and potency. Based on more than thirty years of experience as a Tibetan medical practitioner, the author describes a number of specific Materia Medica in detail, with an emphasis on how to determine fake from authentic ingredients. The author also offers recommendations and guidance on proper cultivation techniques and conservation methods, in line with Tibetan textual sources on the subject, in combination with empirical knowledge.
- Published
- 2009
8. Thoughts on the Precarious State of Medicinal Herbs and Plants in the Tibet Autonomous Region and Ideas About Their Protection
- Author
-
Kalden Nyima and Tsering D. Gonkatsang
- Subjects
Traditional medicine ,media_common.quotation_subject ,Endangered species ,Medicine (miscellaneous) ,Traditional Tibetan Medicine ,Environmental ethics ,Tibetan medicine ,Asian studies ,Geography ,Complementary and alternative medicine ,Arts and Humanities (miscellaneous) ,State (polity) ,Medicinal herbs ,China ,media_common - Abstract
This paper, translated from the Tibetan original, presents the author’s viewpoint on the current situation regarding the protection of medicinal herbs and vegetation—the sources of Tibetan medicine—and makes recommendations on measures that should be taken for their protection in the future. The article also includes an appendix listing species names of plants that are A) particularly rare or endangered, and B) the subjects of conservation efforts and/or cultivation trials through the Project to Strengthen Traditional Tibetan Medicine (PSTTM), which is based in Lhasa, Tibet Autonomous Region (TAR), China.
- Published
- 2009
9. Comparison of Drip‐and‐Ship Versus Mothership Delivery Models of Mechanical Thrombectomy Delivery
- Author
-
Lucio D'Anna, Tsering Dolkar, Orsolya Vittay, Luke Dixon, Matteo Foschi, Michele Russo, Viva Levee, Paul Bentley, Zoe Brown, Charles Hall, Omid Halse, Sohaa Jamil, Harri Jenkins, Dheeraj Kalladka, Joseph Kwan, Abid Malik, Maneesh Patel, Neil Rane, Dylan Roi, Abhinav Singh, Marius Venter, Eleanor Taylor, Kyriakos Lobotesis, and Soma Banerjee
- Subjects
drip‐and‐ship ,ischemic stroke ,large vessel occlusion ,mechanical thrombectomy ,mothership ,Neurology. Diseases of the nervous system ,RC346-429 ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Background It remains uncertain whether the drip‐and‐ship (DS) strategy (transport to the nearest primary stroke centers) or the mothership (MS) model (direct transportation to the comprehensive stroke center) is the organizational stroke model associated with the best functional outcome in acute stroke patients with large vessel occlusion. In this study, we compared the periprocedural complications and outcomes at 90 days of acute stroke patients with large vessel occlusion of the anterior circulation directly admitted to our comprehensive stroke center compared to those referred from primary stroke centers treated with mechanical thrombectomy. Methods This is a single‐center prospective observational study where patients with DS and MS were compared regarding the disability at 90 days, as assessed by applying the modified Rankin scale, the rate of successful reperfusion, and the rate of immediate complications postprocedure. Results Of 579 patients, 216 (37.30%) were MS, and 363 (62.7%) were DS. There was no difference regarding the modified Rankin scale at 3 months between the MS (36.4%) and DS (39.3%) groups of patients treated with mechanical thrombectomy (P=0.362). There was no significant difference regarding the National Institutes of Health Stroke Scale at 24 hours, mortality at 90 days, and rate of successful recanalization postprocedure between the 2 groups. DS was associated with an increased risk of hemorrhagic transformation and symptomatic intracranial hemorrhage (odds ratio, 5.414 [95% CI, 1.572–18.644]; P=0.007). Conclusion Our single‐center study showed no difference in terms of functional independence between the DS and MS organizational paradigm. DS was associated with an increased risk of hemorrhagic transformation and symptomatic intracranial hemorrhage.
- Published
- 2023
- Full Text
- View/download PDF
10. Foreign Body in Recto-Sigmoid colon: A Rare case report and its management
- Author
-
Samir Deolekar, Sulay Shah, Manish Khobragade, Virendra Deshmukh, Pallavi Kulkarni, Abhay Dalvi, and Tsering Dirkhipa
- Subjects
foreign body ,recto-sigmoid ,trans-anally ,Medicine - Abstract
Rectal foreign bodies are an increasingly common presentation to the Emergency department. It is essential for the surgeon to know how to deal with this presentation and the various approaches for retrieval. We present a rare case of a rectal foreign body without peritonitis which was successfully retrieved transanally. Post removal course was uneventful.
- Published
- 2021
- Full Text
- View/download PDF
11. Ketamine infusion as a sedative-analgesic in severe ARDS (KISS)
- Author
-
Ramakanth Pata, Pagali Sandeep, Htun Min Aung, Meet J Patel, Tsering Dolkar, Nway Nway, Kosuru Bhanu, Abolfazl Ahmady, Roudabeh Kiani, Ramaiah Swaroop, Frances Schmidt, and Danilo Enriquez
- Subjects
controlled substances ,covid-19 ,hypnotics and sedatives ,anesthetics ,Internal medicine ,RC31-1245 - Abstract
Rationale Ketamine has been used as a sedative analgesic in trauma setting, but data regarding its efficacy and safety is lacking in severe ARDS. This retrospective study aims to determine if Ketamine is safer as a sedative agent in mechanically ventilated patients. During the COVID pandemic, as there was a shortage of sedative agents, Ketamine was used. Objectives The primary objective was to compare the safety of ketamine to other sedatives. The secondary objective was to compare the effect of ketamine to other sedatives regarding the need for vasopressor, incidence of delirium, infectious complications, acute kidney injury, hospital length of stay, and length of ventilator days. Methods A retrospective, observational cohort study was conducted. Measurements and Main Results One hundred and twenty-four patients (63 men and 61 women) were included. Thirty-four patients received ketamine, while 90 patients received other traditionally used sedatives such as propofol and midazolam. The patients’ median age was 64 years in the ketamine group and 68 years in the non-ketamine group. Seventeen patients in the ketamine group (50%) and 65 patients (72%) in the non-ketamine group had mortality (p
- Published
- 2021
- Full Text
- View/download PDF
12. Enamel multidien biological timing and body size variability among individuals of Chinese Han and Tibetan origins
- Author
-
Hakan Karaaslan, Jeffrey Seckinger, Amel Almabrok, Bin Hu, Hui Dong, Dengsheng Xia, Tsering Dekyi, Russell T. Hogg, Jian Zhou, and Timothy G. Bromage
- Subjects
enamel ,striae of retzius periodicity ,multidien rhythm ,Biology (General) ,QH301-705.5 ,Human anatomy ,QM1-695 ,Physiology ,QP1-981 - Abstract
Aims To measure the number of days of enamel formation between periodic striae of Retzius growth lines, the Retzius periodicity (RP), and to compare this multi-day, or multidien rhythm, to body height and weight among people from Beijing, China and Lhasa, Tibet/China. Subjects and methods Subjects requiring dental extractions from clinics in Beijing, China (N = 338) and Lhasa, Tibet/China (N = 227) provided a tooth and body size information. Multiple observers examined histological sections of the teeth and recorded RP. RP values were statistically compared to body height and weight. Results In Beijing and Lhasa samples, respectively, average height was 166.38 and 165.70 cm, average weight was 59.53 and 66.53 kg, and average RP was 7.47 and 7.69 d. Statistically significant differences were found between Beijing and Lhasa weight and RP means. Correlations for height and weight against RP were significant, but only comparatively strong for height. Conclusions Supporting the negative correlation presented in previous studies, RP is negatively associated with height and weight among a large intraspecific sample of people from Beijing and Lhasa. RP represents a metabolic-mediated multidien biological timing mechanism responsible for the rate of cell proliferation and maintenance of the body.
- Published
- 2021
- Full Text
- View/download PDF
13. Correlates of cervical cancer screening among underserved women
- Author
-
Pal, R, primary, Tsering, D, additional, and Chankapa, YD, additional
- Published
- 2011
- Full Text
- View/download PDF
14. An Investigation Into the Advisability of Translating Names of Tibetan Medicine Into Other Languages
- Author
-
Dorje, Gawai, primary and Gonkatsang, Tsering D., additional
- Published
- 2009
- Full Text
- View/download PDF
15. Thoughts on the Precarious State of Medicinal Herbs and Plants in the Tibet Autonomous Region and Ideas About Their Protection
- Author
-
Gonkatsang, Tsering D., primary and Nyima, Kalden, additional
- Published
- 2009
- Full Text
- View/download PDF
16. Materia Medica of Tibetan Medicine: Identification, Quality Check and Protection Measures
- Author
-
Dawa, Dr, primary and Gonkatsang, Tsering D., additional
- Published
- 2009
- Full Text
- View/download PDF
17. Risk of developing active tuberculosis following tuberculosis screening and preventive therapy for Tibetan refugee children and adolescents in India: An impact assessment.
- Author
-
Kunchok Dorjee, Sonam Topgyal, Tenzin Tsewang, Tenzin Tsundue, Tenzin Namdon, Elizabeth Bonomo, Caroline Kensler, Dekyi Lhadon, Tsering Choetso, Tenzin Nangsel, Tsering Dolkar, Thupten Tsekyi, Chungdak Dorjee, Dawa Phunkyi, Tsetan D Sadutshang, Zorba Paster, and Richard E Chaisson
- Subjects
Medicine - Abstract
BackgroundTuberculosis (TB) rates among Tibetan refugee children and adolescents attending boarding schools in India are extremely high. We undertook a comprehensive case finding and TB preventive treatment (TPT) program in 7 schools in the Zero TB Kids project. We aimed to measure the TB infection and disease burden and investigate the risk of TB disease in children and adults who did and did not receive TPT in the schools.Methods and findingsA mobile team annually screened children and staff for TB at the 7 boarding schools in Himachal Pradesh, India, using symptom criteria, radiography, molecular diagnostics, and tuberculin skin tests. TB infection (TBI) was treated with short-course regimens of isoniazid and rifampin or rifampin. TB disease was treated according to Tibetan and Indian guidelines. Between April 2017 and December 2019, 6,582 schoolchildren (median age 14 [IQR 11-16] years) and 807 staff (median age 40 [IQR 33-48] years) were enrolled. Fifty-one percent of the students and 58% of the staff were females. Over 13,161 person-years of follow-up in schoolchildren (median follow-up 2.3 years) and 1,800 person-years of follow-up in staff (median follow-up 2.5 years), 69 TB episodes occurred in schoolchildren and 4 TB episodes occurred in staff, yielding annual incidence rates of 524/100,000 (95% CI 414-663/100,000) person-years and 256/100,000 (95% CI 96-683/100,000) person-years, respectively. Of 1,412 schoolchildren diagnosed with TBI, 1,192 received TPT. Schoolchildren who received TPT had 79% lower risk of TB disease (adjusted hazard ratio [aHR] 0.21; 95% CI 0.07-0.69; p = 0.010) compared to non-recipients, the primary study outcome. Protection was greater in recent contacts (aHR 0.07; 95% CI 0.01-0.42; p = 0.004), the secondary study outcome. The prevalence of recent contacts was 28% (1,843/6,582). Two different TPT regimens were used (3HR and 4R), and both were apparently effective. No staff receiving TPT developed TB. Overall, between 2017 and 2019, TB disease incidence decreased by 87%, from 837/100,000 (95% CI 604-1,129/100,000) person-years to 110/100,000 (95% CI 36-255/100,000) person-years (p < 0.001), and TBI prevalence decreased by 42% from 19% (95% CI 18%-20%) to 11% (95% CI 10%-12%) (p < 0.001). A limitation of our study is that TB incidence could be influenced by secular trends during the study period.ConclusionsIn this study, following implementation of a school-wide TB screening and preventive treatment program, we observed a significant reduction in the burden of TB disease and TBI in children and adolescents. The benefit of TPT was particularly marked for recent TB contacts. This initiative may serve as a model for TB detection and prevention in children and adolescents in other communities affected by TB.
- Published
- 2021
- Full Text
- View/download PDF
18. Letters to the Editor
- Author
-
Hoadley D, Tsering D, and Kissinger P
- Subjects
Gerontology ,medicine.medical_specialty ,education.field_of_study ,business.industry ,Transmission (medicine) ,Refugee ,media_common.quotation_subject ,Public health ,Population ,Public Health, Environmental and Occupational Health ,Dermatology ,medicine.disease ,Infectious Diseases ,Denial ,Acquired immunodeficiency syndrome (AIDS) ,Family medicine ,Health care ,medicine ,Pharmacology (medical) ,Misinformation ,education ,business ,media_common - Abstract
An estimated 1.7 million people in India are infected with HIV. More than 20000 exiled Tibetans currently live in 19 refugee settlements in the Indian state of Himachal Pradesh. Seasonal migration to areas of high HIV prevalence tourism into the settlements and denial and hesitancy to promote safer sex practices are factors which may place these refugees at risk of contracting and transmitting HIV. The Tibetan Delek Hospital in Dharmsala India began HIV/AIDS training courses in July 1995 for health professionals who work in the Tibetan community. Findings are reported from a study conducted in April 1996 to assess course participants mid-training attitudes about HIV/AIDS and their training needs. 22 health workers completed a self-administered questionnaire. 86% were women mean age was 31 years 57% were nurses 24% were community health workers 14% were public health educators 1 participant was a dental therapist and all perceived religion to be important. 62% were care providers and 38% were administrators. AIDS was cited as the most important health problem by 14% of respondents. Respondents identified their primary sources of HIV/AIDS information as the television (86%) health clinics (82%) and newspapers (73%). 64% had discussed HIV/AIDS with friends 50% with patients or students 41% with family and relatives and 32% with a sex partner. 60% believed that giving away condoms promotes sexual activity and 43% believed that people with AIDS should be isolated. Despite some misinformation about transmission routes the overall level of HIV-related knowledge was adequate. Sexual conservatism in the Tibetan community is a potential barrier to HIV/AIDS education.
- Published
- 1998
19. What Makes a Hot-Spring Habitat 'Hot' for the Hot-Spring Snake: Distributional Data and Niche Modelling for the Genus Thermophis (Serpentes, Colubridae)
- Author
-
Sylvia Hofmann, Peter Fritzsche, Tsering Dorge, Georg Miehe, and Michael Nothnagel
- Subjects
hot-spring keel-back ,distribution ,habitat suitability ,Hengduan Mountains ,Qinghai-Tibet-Plateau ,Biology (General) ,QH301-705.5 - Abstract
Knowledge about species’ distributions is central to diverse applications in ecology, biogeography, and conservation science. Hot-spring snakes of the genus Thermophis share a distribution restricted to geothermal sites at the Tibetan Plateau (T. baileyi) and in the Hengduan Mountains (T. zhaoermii, T. shangrila). Although the suture zones of these regions are widely covered with hot springs, Thermophis populations are restricted to only a few of these habitats. Here, we use bioclimatic, topographic, and land cover data to model the potential distribution of the genus. Moreover, using logistic regression on field survey data of T. zhaoermii, we test whether hot-spring water parameters and landscape features correlate with the species’ presence or absence. Hot springs with temperatures between 45 and 100 °C and winter precipitation showed the most predictive power. At small scale, our data support the relevance of the hot-spring temperature on the species’ occurrence and indicate that also the along-valley distance from the hot-spring site to the major river might influence the distribution of Thermophis species. Our findings contribute to better understand factors shaping the current distribution of the genus and will aid in setting priorities in applied conservation biology for the hot-spring snakes.
- Published
- 2021
- Full Text
- View/download PDF
20. Male behavior toward reproductive responsibilities in Sikkim
- Author
-
Chankapa Yalley, Pal Ranabir, and Tsering Dechenla
- Subjects
Contraceptive ,knowledge ,practice ,Public aspects of medicine ,RA1-1270 - Abstract
Background: Failure to assess the impact of men′s perceptions on reproductive health decisions has weakened reproductive health care programmes. Objectives: We evaluated husbands′ knowledge and practices with regard to the use of conventional contraceptives as manifested through reproductive health and sexual decisions. Materials and Methods: A population-based cross-sectional study was conducted in a rural setting of Sang PHC and Pakyong PHC area in Sikkim, India. Five hundred and ninety-six currently married men whose names were included in the eligible couple registers were selected by multistage random sampling. Information regarding knowledge and practice of contraceptive use was obtained from the participants by interview. Results: Out of the 596 male participants, the majority (55.87%) opined that they were in favor of using a contraceptive method after one child. Most participants (55.54%) said that their main source of information on contraceptive methods were the government health staff, while 24.84% acknowledged that most of their information came from the mass media. Eighty-two percent reported currently using some kind of the contraceptive method. Condom was used as a temporary method by only 16.27% of the responders, with the permanent method of vasectomy being opted for by only 4.87%. The method most widely used by their partners was the oral contraceptive pill (43.41%), followed by tubectomy (15.77%) and IUD (4.19%). Conclusions: This research found that awareness and prevalence of contraceptive use among married men in a rural community in the East District of Sikkim were quite high. Nevertheless, female contraceptive methods continue to be the dominant method used in the community. Researchers and health care providers often ignore the sociodemographic significance of men and their role in the acceptance of contraceptive practices in the community.
- Published
- 2010
21. Role of family and peers in initiation and continuation of substance use
- Author
-
Tsering Dechenla and Pal Ranabir
- Subjects
Initiation ,rural ,source ,substance use ,urban ,Psychiatry ,RC435-571 - Abstract
Aims: To assess the impact of family and peers on both initiation and continuation of substance use among eighth, ninth and tenth grade adolescent high school students. Design: Population based cross-sectional study. Setting: Two high schools of West Bengal, India. Participants: 416 students in class VIII, IX, and X in two schools. Interventions: None. Measurements: Substance use: initiation, sources, reasons for continuation. Then proportions and chi-square test was used for statistical analysis. Materials and Methods: This was a population based cross sectional study conducted among 416 students from class VII, IX and X in two high schools( urban and rural) of West Bengal, India selected by Multistage random sampling. A self administered anonymous pretested close ended questionnaire was used with the main outcome measures of initiation, sources, reasons for continuation of substance use based on WHO study team questionnaire. Results: Prevalence of substance use was found to be higher among the urban students (15.1%) than their rural counterparts (10.7%). The proportion of users was higher in the higher grades as compared to the lower grades. Among urban as well as rural students, 16 years and above were significantly more likely than their counterparts aged 15 years and below to report lifetime use. The mean age of initiation ranged from 12.6 to 13.9 years. Family members and friends were found to have a considerable influence not only on initiation but also important sources for money as well as the substance. Easy availability in the neighborhood was also an important correlate to continuation of substances. Conclusions: Family environment as well as peer groups has an important bearing on initiation and continuation of substance use. Experimentation of substance use motivated by peer groups is common among adolescents and starts early in life. Hence, it is necessary to provide health promotion programs directed toward students and their families which encourage attitude shaping among school children towards self-confidence and adequacy.
- Published
- 2009
22. Infectious disease markers in blood donors at central referral hospital, Gangtok, Sikkim
- Author
-
Adhikari Luna, Bhatta Dharmraj, Tsering Dechen, Sharma Dhruva, Pal Ranabir, and Gupta Amlan
- Subjects
Diseases of the blood and blood-forming organs ,RC633-647.5 - Published
- 2010
23. Tobacco use among high school students of West Bengal, India
- Author
-
Tsering Dechenla, Pal Ranabir, and Dasgupta Aparajita
- Subjects
Public aspects of medicine ,RA1-1270 - Published
- 2008
24. Microwave-Assisted Selective Nucleopalladation-Triggered Cascade Process: Synthesis of Highly Functionalized 3-Chloro-1 H -indenes.
- Author
-
Jandial T, Gupta A, Tsering D, Kapoor KK, and Sridharan V
- Abstract
A nucleopalladation-triggered cascade transformation of internal alkynes bearing an amino nucleophile and an electrophilic enone was investigated under unconventional microwave-assisted conditions. Among the three possible pathways, the chloropalladation-triggered domino process proceeded selectively to furnish 3-chloro-1 H -indenes in good to excellent yields. The reactions under microwave irradiation were completed in 30 min, and the conventional heating required 3-5 h for completion. The yields obtained under nonclassical heating using microwave irradiation are marginally higher (71-97%) than those of the conventional heating conditions (67-96%). The mechanism of this domino process involves chloropalladation of alkynes to deliver σ-vinylpalladium intermediates, intramolecular carbopalladation via Heck-type olefin insertion, and protodepalladation steps. The other two competitive intramolecular aminopalladation-initiated cascades via 7- endo-dig or 6- exo-dig cyclizations leading to oxazepine or benzoxazine scaffolds were not observed.
- Published
- 2024
- Full Text
- View/download PDF
25. Investigation of the Mechanism of Siweixizangmaoru Decoction in Improving CIA-Induced Arthritis in Rats Based on Network Pharmacology and Experimental Verification.
- Author
-
Niu Y, Yuan Y, Wang T, Yuan R, Zhang M, Wang S, Tsering D, Huang S, and Li B
- Abstract
Background: Rheumatoid Arthritis (RA) is a chronic autoimmune disease with a complex etiology. Siweixizangmaoru Decoction (SXD) has been used to treat RA in Tibet for a long history as a classic Tibetan medicine formula. However, the potential pharmacological mechanism has not been elucidated yet., Aims: The aim of this study was to evaluate the efficacy and mechanism of action of SXD in the treatment of RA using network pharmacology and molecular docking analysis., Method: Network pharmacology was employed to identify the potential bioactive components and key targets of SXD for the treatment of RA. Molecular docking of key targets and potential compounds was conducted. High-performance liquid chromatography was performed to validate the predicted active components of SXD. We established a rat model of RA and evaluated the histopathology of each group of rats. In addition, the levels of inflammatory factors in serum and the expression levels of PI3K/AKT and MAPK pathway-related proteins in synovial tissue were detected., Results: The results of network pharmacological analyses indicated that apigenin, rhamnolipids, kaempferol, quercetin, and naringenin are potential bioactive components of SXD for the treatment of rheumatoid arthritis and that their therapeutic effects may be related to the PI3K-Akt and MAPK pathways. The results of in vivo experiments show that SXD improved the arthritis index, significantly reduced joint swelling, and improved synovial inflammation and cartilage destruction., Conclusion: Network pharmacology, along with experimental validation, provided a useful approach for understanding the pharmacological mechanism of Siweixizangmaoru decoction in RA., (Copyright© Bentham Science Publishers; For any queries, please email at epub@benthamscience.net.)
- Published
- 2024
- Full Text
- View/download PDF
26. An Energetic and Topological Approach to Understanding the Interplay of Noncovalent Interactions in a Series of Crystalline Spiropyrrolizine Compounds.
- Author
-
Tsering D, Dey P, Kapoor KK, and Seth SK
- Abstract
Synthesis of quinoline-containing spiropyrrolizine was achieved via a 1,3-dipolar cycloaddition reaction of azomethine ylide (generated in situ from ninhydrin and l-proline) and ( E )-2-styrylquinoline. The synthesized compounds were characterized by
1 H NMR,13 C NMR, HRMS, and single-crystal XRD analysis. The XRD data revealed that the solid-state structures of the compounds belong to the monoclinic system of the space group P 21 / c and are stabilized through various weak noncovalent interactions such as C-H···O, C-H···π, and π···π interactions. The noncovalent interactions are characterized and quantified through Hirshfeld surface analysis. Moreover, the interaction energies of the intermolecular noncovalent interactions are calculated through PIXEL calculation. The PIXEL calculation provides precise interaction energy with an energy decomposition scheme. Energy Framework calculations have also been performed to delve deeper into understanding the intermolecular interactions. The intermolecular interactions are further characterized using Bader's theory of "atoms in molecules" (QTAIM) and the "noncovalent" (NCI) interaction plot index. The nature and strength of noncovalent interactions are analyzed from the topological parameters at (3, -1) bond critical points (BCPs)., Competing Interests: The authors declare no competing financial interest., (© 2024 The Authors. Published by American Chemical Society.)- Published
- 2024
- Full Text
- View/download PDF
27. Multicenter comparison of Chiari malformation type I presentation in children versus adults.
- Author
-
Mortazavi A, Almeida ND, Hofmann K, Davidson L, Rotter J, Phan TN, Tsering D, Maxwell C, Karunakaran J, Veznedaroglu E, Caputy AJ, Heiss JD, Sandhu FA, Myseros JS, Oluigbo C, Magge SN, Shields DC, Rosner MK, Chatain GP, and Keating RF
- Subjects
- Humans, Female, Male, Child, Retrospective Studies, Adult, Adolescent, Young Adult, Middle Aged, Treatment Outcome, Syringomyelia surgery, Syringomyelia diagnostic imaging, Syringomyelia complications, Child, Preschool, Age Factors, Scoliosis surgery, Scoliosis diagnostic imaging, Arnold-Chiari Malformation surgery, Arnold-Chiari Malformation diagnostic imaging, Arnold-Chiari Malformation complications, Decompression, Surgical methods
- Abstract
Objective: Treatment for Chiari malformation type I (CM-I) often includes surgical intervention in both pediatric and adult patients. The authors sought to investigate fundamental differences between these populations by analyzing data from pediatric and adult patients who required CM-I decompression., Methods: To better understand the presentation and surgical outcomes of both groups of patients, retrospective data from 170 adults and 153 pediatric patients (2000-2019) at six institutions were analyzed., Results: The adult CM-I patient population requiring surgical intervention had a greater proportion of female patients than the pediatric population (p < 0.0001). Radiographic findings at initial clinical presentation showed a significantly greater incidence of syringomyelia (p < 0.0001) and scoliosis (p < 0.0001) in pediatric patients compared with adult patients with CM-I. However, presenting signs and symptoms such as headaches (p < 0.0001), ocular findings (p = 0.0147), and bulbar symptoms (p = 0.0057) were more common in the adult group. After suboccipital decompression procedures, 94.4% of pediatric patients reported symptomatic relief compared with 75% of adults with CM-I (p < 0.0001)., Conclusions: Here, the authors present the first retrospective evaluation comparing adult and pediatric patients who underwent CM-I decompression. Their analysis reveals that pediatric and adult patients significantly differ in terms of demographics, radiographic findings, presentation of symptoms, surgical indications, and outcomes. These findings may indicate different clinical conditions or a distinct progression of the natural history of this complex disease process within each population, which will require prospective studies to better elucidate.
- Published
- 2024
- Full Text
- View/download PDF
28. Analysis of bias in toxicology screening of patients in serious motor vehicle collisions.
- Author
-
Bedi NS, Tsering D, Raubenhold R, Allee L, Mahoney EJ, Wurcel A, and Byhoff E
- Subjects
- Humans, Risk Factors, Bias, Accidents, Traffic prevention & control, Motor Vehicles
- Published
- 2024
- Full Text
- View/download PDF
29. Siweixizangmaoru Decoction Ameliorated Type II Collagen-Induced Arthritis in Rats via Regulating JAK2-STAT3 and NF-κB Signaling Pathway.
- Author
-
Niu Y, Feng Q, Cui M, Fan C, Wang T, Yuan R, Tsering D, Huang S, and Li B
- Subjects
- Animals, RAW 264.7 Cells, Mice, Male, Rats, Rats, Sprague-Dawley, Collagen Type II metabolism, Lipopolysaccharides, Nitric Oxide metabolism, Arthritis, Rheumatoid drug therapy, Arthritis, Rheumatoid metabolism, Oxidative Stress drug effects, Medicine, Tibetan Traditional methods, Janus Kinase 2 metabolism, NF-kappa B metabolism, STAT3 Transcription Factor metabolism, Arthritis, Experimental drug therapy, Arthritis, Experimental pathology, Arthritis, Experimental metabolism, Drugs, Chinese Herbal pharmacology, Drugs, Chinese Herbal therapeutic use, Signal Transduction drug effects, Anti-Inflammatory Agents pharmacology, Anti-Inflammatory Agents therapeutic use
- Abstract
Siweixizangmaoru decoction (SXD) is widely used as an anti-rheumatoid arthritis (RA) in Tibet, however, the specific anti-inflammatory mechanism of SXD is still unclear. This research attempts to examine the efficacy and possible mechanisms of SXD in treating RA. The primary chemical components of SXD were identified using UHPLC-Q-Exactive Orbitrap MS. We established a lipopolysaccharide (LPS)-induced RAW264.7 macrophage inflammatory injury model to explore the anti-inflammatory mechanism of SXD and validated it through in vivo experiments. According to our research in vitro as well as in vivo, SXD exhibits anti-inflammatory qualities. SXD can suppress nitric oxide (NO) and pro-inflammatory factor production in RAW264.7 cells activated by LPS. The mechanism underlying this effect might be connected to the janus tyrosine kinase 2-signal transducer and activator of transcription 3 (JAK2/STAT3) and nuclear factor-κB (NF-κB) signaling pathways. In vivo, SXD alleviates joint swelling, decreases the generation of inflammatory factors in the serum, lowers oxidative stress, and improves joint damage. In short, SXD improves joint degeneration and lowers symptoms associated with RA by regulating inflammation via the suppression of NF-κB and JAK2/STAT3 signaling pathway activation.
- Published
- 2024
- Full Text
- View/download PDF
30. Isolated subependymal giant cell astrocytoma (SEGA) in the absence of clinical tuberous sclerosis: two case reports and literature review.
- Author
-
Cobourn KD, Chesney KM, Mueller K, Fayed I, Tsering D, and Keating RF
- Subjects
- Humans, Child, Retrospective Studies, Magnetic Resonance Imaging adverse effects, Tuberous Sclerosis complications, Tuberous Sclerosis diagnostic imaging, Tuberous Sclerosis genetics, Astrocytoma diagnostic imaging, Astrocytoma genetics, Astrocytoma therapy, Brain Neoplasms diagnostic imaging, Brain Neoplasms genetics, Brain Neoplasms therapy
- Abstract
Purpose: Subependymal giant cell astrocytoma (SEGA) is a WHO grade I pediatric glioma arising in 5-15% of patients with tuberous sclerosis (TSC). Rare cases of isolated SEGA without TSC have been described. The etiology, genetic mechanisms, natural history, and response to treatment of these lesions are currently unknown. We describe two such cases of isolated SEGA with follow-up., Methods: Retrospective review was performed at a single institution to describe the clinical course of pathology-confirmed SEGA in patients with germline testing negative for TSC mutations., Results: Two cases of isolated SEGA were identified. Genetic analysis of the tumor specimen was available for one, which revealed an 18 base pair deletion in TSC1. Both cases were managed with surgical resection, one with preoperative embolization. In spite of a gross total resection, one patient experienced recurrence after three years. Treatment with an mTOR inhibitor led to a significant interval reduction of the mass on follow-up MRI. The patient tolerated the medication well for 6 years and is now off of treatment for 2 years with a stable lesion., Conclusion: Cases of SEGA outside of the context of TSC are exceedingly rare, with only 48 cases previously described. The genetic mechanisms and treatment response of these lesions are poorly understood. To date, these lesions appear to respond well to mTOR inhibitors and may behave similarly to SEGAs associated with TSC. However, given that experience is extremely limited, these cases should be followed long term to better understand their natural history and treatment response., (© 2023. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
- Published
- 2024
- Full Text
- View/download PDF
31. Size and Shape Matter: Cell Viability of Preloaded Descemet Stripping Automated Endothelial Keratoplasty Grafts in Three Different Carriers.
- Author
-
Straiko MMW, Sawant OB, Hubbs R, Dye PK, Tsering D, Hicks N, Odell K, Ellison MS, Titus MS, Straiko MD, and Tran KD
- Subjects
- Humans, Cell Survival, Corneal Endothelial Cell Loss diagnosis, Corneal Endothelial Cell Loss surgery, Tissue and Organ Harvesting, Eye Banks methods, Endothelium, Corneal transplantation, Descemet Membrane surgery, Descemet Stripping Endothelial Keratoplasty methods
- Abstract
Purpose: The aim of this study was to examine endothelial cell loss (ECL) associated with preloaded Descemet stripping automated endothelial keratoplasty (DSAEK) grafts loaded into 3 carriers of different size and shape., Methods: Thirty-six donor corneas were prepared for DSAEK and loaded into an EndoGlide Ultrathin (control) (2.0 mm × 3.5 mm lumen, 4.5 mm/4.9 mm incision for scleral tunnel/clear corneal insertion), Descemet membrane endothelial keratoplasty EndoGlide (experimental) (1.1 mm × 1.7 mm lumen, 2.65 mm incision), or round glass Jones tube (experimental) (1.8 mm lumen, 3.0 mm incision). Control grafts were stored for 6 days in Optisol-GS and experimental grafts stored for 24 hours in Life4C before analysis using Calcein AM staining. Grafts were imaged and ECL was analyzed by FIJI segmentation. The statistical significance of ECL was determined using 1-way ANOVA and Tukey post hoc analysis., Results: There were no significant differences in donor characteristics for grafts in each cohort. ECL for grafts loaded into the EndoGlide Ultrathin was 10.3% ± 2.3% (graft thickness: 60-189 μm, n = 9). ECL for grafts loaded into the Descemet membrane endothelial keratoplasty EndoGlide was 22.2% ± 7.1% (graft thickness: 38-63 μm, n = 9). ECL for thin grafts (34-60 μm, n = 9) loaded into the Jones tube was 24.0% ± 5.0%. ECL for thick grafts (92-119 μm, n = 9) loaded into the Jones tube was 34.2% ± 6.1% ECL ( P < 0.001). Combined regression analysis revealed that graft thickness is directly correlated to ECL ( P < 0.01)., Conclusions: The size and shape of the carrier can influence the cell viability of preloaded DSAEK grafts. Compared with a larger carrier, smaller lumen carriers are associated with greater ECL. In smaller lumen carriers, ECL increases with increasing DSAEK graft thickness., Competing Interests: The authors have no funding or conflicts of interest to disclose., (Copyright © 2023 Wolters Kluwer Health, Inc. All rights reserved.)
- Published
- 2024
- Full Text
- View/download PDF
32. "More than just checking the box": community-based organizations on their role in Medicaid redesigns.
- Author
-
Tsering D, Stauffer CM, Gittzus JA, Byhoff E, and Taylor LA
- Abstract
New York and Massachusetts 1115 Medicaid demonstration waivers aimed to prioritize social determinants of health and engage community-based organizations to improve health outcomes. This is an evaluation of community-based organizations' public comments regarding their participation in social services delivery within the 1115 waivers. Both states solicited public comments on waiver implementation to date and potential improvements. The research team extracted all publicly available comments ( n = 359) made by direct service providers between November 2016 and April 2019. The sample was then limited to only comments that discussed social service provision and health care-social service partnerships ( n = 58). Findings are presented in 2 stages: (1) concerns regarding delivery system reform incentive payments funding levels, timing, and flow and (2) perspectives on how states and Medicaid administrators could improve health care-community organization relationships. Resource-dependent, community-based organizations protested insufficient funding. Additional comments identified specific design, structure, and implementation aspects of the 1115 waiver that could improve partnerships. Despite 1115 waivers prioritizing social service integration, community-based organizations still feel underfunded and disenfranchised. Aligning with health care standards requires significant time and effort. Given resource constraints, the state must facilitate these investments. Community organizations' feedback can also offer guidance on waiver strategies in other states., Competing Interests: Conflicts of interest Please see ICMJE form(s) for author conflicts of interest. These have been provided as supplementary materials., (© The Author(s) 2023. Published by Oxford University Press on behalf of Project HOPE - The People-To-People Health Foundation, Inc.)
- Published
- 2023
- Full Text
- View/download PDF
33. Quinoxalinone substituted pyrrolizine (4h)-induced dual inhibition of AKT and ERK instigates apoptosis in breast and colorectal cancer by modulating mitochondrial membrane potential.
- Author
-
Amin T, Sharma RP, Mir KB, Slathia N, Chhabra S, Tsering D, Kotwal P, Bhagat M, Nandi U, Parkesh R, Kapoor KK, and Goswami A
- Subjects
- Animals, Mice, Apoptosis drug effects, Cell Line, Tumor, Cell Proliferation, Extracellular Signal-Regulated MAP Kinases antagonists & inhibitors, Membrane Potential, Mitochondrial drug effects, Mitogen-Activated Protein Kinase 3 metabolism, Proto-Oncogene Proteins c-akt antagonists & inhibitors, Pyrroles pharmacology, Quinoxalines pharmacology, Humans, Breast Neoplasms drug therapy, Colorectal Neoplasms drug therapy, Molecular Docking Simulation
- Abstract
AKT and ERK 1/2 play a pivotal role in cancer cell survival, proliferation, migration, and angiogenesis. Therefore, AKT and ERK 1/2 are considered crucial targets for cancer intervention. In this study, we envisaged the role of AKT and ERK signaling in apoptosis regulation in presence of compound 4h, a novel synthetic derivative of quinoxalinone substituted spiropyrrolizines exhibiting substantial antiproliferative activity in various cancer cell lines. Structurally 4h is a spiropyrrolizine derivative. Molecular docking analysis revealed that compound 4h shows strong binding affinity with AKT-1 (-9.5 kcal/mol) and ERK2 (-9.0 kcal/mol) via binding at allosteric sites of AKT and active site of ERK2. The implications of 4h binding with these two survival kinases resulted in the obstruction for ATP binding, hence, hampering their phosphorylation dependent activation. We demonstrate that 4h mediated apoptotic induction via disruption in the mitochondrial membrane potential of MCF-7 and HCT-116 cells and 4h-mediated inhibition of survival pathways occurred in a wild type PTEN background and is diminished in PTEN
-/- cells. In 4T1 mammary carcinoma model, 4h exhibited pronounced reduction in the tumor size and tumor volume at significantly low doses. Besides, 4h reached the highest plasma concentration of 5.8 μM within a period of 1 h in mice model intraperitoneally. Furthermore, 4h showed acceptable clearance with an adequate elimination half-life and satisfactory pharmacokinetic behaviour, thus proclaiming as a potential lead molecule against breast and colorectal cancer by specifically inhibiting simultaneously AKT and ERK1/2 kinases., Competing Interests: Declaration of competing interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2023 Elsevier B.V. All rights reserved.)- Published
- 2023
- Full Text
- View/download PDF
34. Right versus left fully robotic live donor nephrectomy and open kidney transplantation: Does the laterality of the donor kidney really matter?
- Author
-
Ruch B, Tsering D, Bhati C, Kumar D, Saeed M, Lee SD, Khan A, Imai D, Bruno D, Levy M, Cotterell A, and Sharma A
- Abstract
Objective: Robotic-assisted live donor nephrectomy (LDN) is being gradually adopted across transplant centers. The left donor kidney is preferred over right due to anatomical factors and ease of procurement. We aimed to study donor and recipient outcomes after robotic procurement and subsequent open implantation of right and left kidneys., Methods: All fully robotic LDNs and their corresponding open kidney transplants performed at our center between February 2016 and December 2021 were retrospectively analyzed., Results: Out of 196 robotic LDN (49 [right] vs. 147 [left]), 10 (5.1%) donors had intra-operative events (6.1% [right] vs. 4.8% [left], p =0.71). None of the LDN required conversion to open surgery. The operative times were comparable for the two groups. Nausea (13.3%) was the most common post-operative complication. There was no mortality in either LDN group. Herein, we report our outcomes on 156 recipients (39 right and 117 left allografts) excluding robotic implants, exports, and pediatric recipients. There were no significant differences between right and left kidney recipients with respect to 1-year post-transplant patient survival (100.0% vs. 98.1%, p =0.45) or graft survival (93.9% vs. 97.1%, p =0.11), or delayed graft function (7.7% vs. 5.1%, p =0.55)., Conclusion: Non-hand-assisted robotic live donor nephrectomies can be safely performed with excellent outcomes. Right LDN was not associated with higher incidence of complications compared to left LDN. Open implantation of robotically procured right renal allografts was not associated with higher risk of recipient complications., Competing Interests: The authors declare no conflict of interest., (© 2023 Editorial Office of Asian Journal of Urology. Production and hosting by Elsevier B.V.)
- Published
- 2023
- Full Text
- View/download PDF
35. Diversity-Oriented Synthesis of Benzo[ f ][1,4]oxazepine-, 2 H -Chromene-, and 1,2-Dihydroquinoline-Fused Polycyclic Nitrogen Heterocycles under Microwave-Assisted Conditions.
- Author
-
Rajput D, Tsering D, Karuppasamy M, Kapoor KK, Nagarajan S, Maheswari CU, Bhuvanesh N, and Sridharan V
- Subjects
- Molecular Structure, Microwaves, Nitrogen, Naphthyridines, Oxazepines, Quinolines
- Abstract
An efficient, diversity-oriented synthesis of oxazepino[5,4- b ]quinazolin-9-ones, 6 H -chromeno[4,3- b ]quinolines, and dibenzo[ b , h ][1,6]naphthyridines was established involving a substrate-based approach under microwave-assisted and conventional heating conditions in high yields (up to 88%). The CuBr
2 -catalyzed, chemoselective cascade annulation of O -propargylated 2-hydroxybenzaldehydes and 2-aminobenzamides delivered oxazepino[5,4- b ]quinazolin-9-ones involving a 6- exo - trig cyclization-air oxidation-1,3-proton shift-7- exo-dig cyclization sequence. This one-pot process showed excellent atom economy (-H2 O) and constructed two new heterocyclic rings (six- and seven-membered) and three new C-N bonds in a single synthetic operation. On the other side of diversification, the reaction between O / N -propargylated 2-hydroxy/aminobenzaldehydes and 2-aminobenzyl alcohols delivered 6 H -chromeno[4,3- b ]quinolines and dibenzo[ b , h ][1,6]naphthyridines involving sequential imine formation-[4 + 2] hetero-Diels-Alder reaction-aromatization steps. The influence of microwave assistance was superior to conventional heating, where the reactions were clean, rapid, and completed in 15 min, and the conventional heating required a longer reaction time at a relatively elevated temperature.- Published
- 2023
- Full Text
- View/download PDF
36. How effective are interventions in optimizing workplace mental health and well-being? A scoping review of reviews and evidence map.
- Author
-
Waddell A, Kunstler B, Lennox A, Pattuwage L, Grundy EAC, Tsering D, Olivier P, and Bragge P
- Subjects
- Humans, Mental Health, Quality of Life, Workplace psychology, Burnout, Professional, Mindfulness methods
- Abstract
Objectives: Mental well-being is critical to quality of life. Workplace mental well-being is crucial to ensure employee health, satisfaction, and performance. Mental ill-health is a global challenge, costing workplaces $17 billion per year. Workplaces have realized the need for investment in interventions to promote mental health and well-being in their workforce. However, given their limited resources, workplace personnel responsible for program implementation need evidence-based guidance on which interventions influence which outcomes., Methods: This study employed a scoping review methodology in order to produce an evidence map and includes reviews of workplace mental well-being interventions. The search strategy focused on peer-reviewed articles with the primary aim of investigating workplace mental health interventions. Reviews were assessed for quality using AMSTAR 2. The evidence map includes interventions (rows) and outcomes (columns), with the relative size of the reviews underpinning each intersection represented by circles and the direction of evidence represented by color., Results: Eighty reviews were deemed eligible from 4795 citations. The resulting evidence map includes 17 intervention types designed to influence 12 outcomes. Interventions with the highest quality evidence were mindfulness, education and information provision, and individual psychological therapies. The most common outcomes were burnout / stress reduction and mental well-being. Interventions tended to focus on individual level factors rather than organizational or system-level factors., Conclusion: The evidence-base for workplace mental health interventions is broad and extensive. There is an apparent knowledge-to-practice gap, presenting challenges to implementing workplace mental health programs (ie, what interventions have the highest quality evidence). This study aims to fill the gap by providing an interactive evidence-map. Future research should look to fill the gaps within the map including the lack of organization and system level factors and especially economic evaluations.
- Published
- 2023
- Full Text
- View/download PDF
37. Use of intraoperative topical antibiotics to reduce intrathecal baclofen pump surgical site infections: a single institution's experience over 24 years.
- Author
-
Cobourn KD, Patel N, Tsering D, Jamshidi AM, Abousy M, Myseros JS, Oluigbo C, Magge SN, and Keating RF
- Subjects
- Humans, Baclofen therapeutic use, Surgical Wound Infection drug therapy, Surgical Wound Infection prevention & control, Anti-Bacterial Agents therapeutic use, Muscle Spasticity drug therapy, Muscle Spasticity etiology, Muscle Spasticity surgery, Retrospective Studies, Infusion Pumps, Implantable adverse effects, Injections, Spinal adverse effects, Injections, Spinal methods, Muscle Relaxants, Central therapeutic use, Cerebral Palsy drug therapy
- Abstract
Objective: Patients requiring intrathecal baclofen (ITB) therapy are at high risk for surgical site infections (SSIs) given their poor functional status. After years of a nominal infection rate, there was an inexplicable increase in ITB pump infections at the authors' institution and multiple investigations offered no solution. Use of intraoperative topical antibiotics is well-documented in the orthopedic literature and was considered for ITB pump insertion. In this study, the authors investigated whether intraoperative vancomycin and tobramycin powder at the ITB pump site could reduce SSIs., Methods: Operative and infection data were collected and analyzed retrospectively to determine the efficacy of this change. Patients were stratified into three cohorts (1998-2009, 2010-2012, and 2013-2021) to better understand the trends before and after implementation of intraoperative topical antibiotics. Each cohort had similar demographics., Results: One hundred fifty-four patients underwent 272 ITB pump procedures between 1998 and 2021 (131 in 1998-2009, 49 in 2010-2012, and 92 in 2013-2021) for cerebral palsy (69.5%), spastic quadriparesis due to traumatic brain injury (7.1%), anoxic brain injury (6.5%), and other causes (16.9%). Infection rates were reduced from a high of 32% in 2010-2011 to 3.8% over the last 2.5 years (p = 0.0094). There were no adverse effects from the use of topical antibiotics., Conclusions: In the setting of an intractable rise in ITB pump infections, the addition of intraoperative topical antibiotics significantly reduced postoperative infections in a high-risk population. One could appreciate a significant drop each year in the rate of infections after the institution of intraoperative topical antibiotics. The reduction in SSIs significantly improved the long-term outcomes for these patients.
- Published
- 2023
- Full Text
- View/download PDF
38. Magnetic resonance imaging-guided stereotactic laser ablation therapy for the treatment of pediatric epilepsy: a retrospective multiinstitutional study.
- Author
-
Arocho-Quinones EV, Lew SM, Handler MH, Tovar-Spinoza Z, Smyth MD, Bollo RJ, Donahue D, Perry MS, Levy M, Gonda D, Mangano FT, Kennedy BC, Storm PB, Price AV, Couture DE, Oluigbo C, Duhaime AC, Barnett GH, Muh CR, Sather MD, Fallah A, Wang AC, Bhatia S, Eastwood D, Tarima S, Graber S, Huckins S, Hafez D, Rumalla K, Bailey L, Shandley S, Roach A, Alexander E, Jenkins W, Tsering D, Price G, Meola A, Evanoff W, Thompson EM, and Brandmeir N
- Abstract
Objective: The authors of this study evaluated the safety and efficacy of stereotactic laser ablation (SLA) for the treatment of drug-resistant epilepsy (DRE) in children., Methods: Seventeen North American centers were enrolled in the study. Data for pediatric patients with DRE who had been treated with SLA between 2008 and 2018 were retrospectively reviewed., Results: A total of 225 patients, mean age 12.8 ± 5.8 years, were identified. Target-of-interest (TOI) locations included extratemporal (44.4%), temporal neocortical (8.4%), mesiotemporal (23.1%), hypothalamic (14.2%), and callosal (9.8%). Visualase and NeuroBlate SLA systems were used in 199 and 26 cases, respectively. Procedure goals included ablation (149 cases), disconnection (63), or both (13). The mean follow-up was 27 ± 20.4 months. Improvement in targeted seizure type (TST) was seen in 179 (84.0%) patients. Engel classification was reported for 167 (74.2%) patients; excluding the palliative cases, 74 (49.7%), 35 (23.5%), 10 (6.7%), and 30 (20.1%) patients had Engel class I, II, III, and IV outcomes, respectively. For patients with a follow-up ≥ 12 months, 25 (51.0%), 18 (36.7%), 3 (6.1%), and 3 (6.1%) had Engel class I, II, III, and IV outcomes, respectively. Patients with a history of pre-SLA surgery related to the TOI, a pathology of malformation of cortical development, and 2+ trajectories per TOI were more likely to experience no improvement in seizure frequency and/or to have an unfavorable outcome. A greater number of smaller thermal lesions was associated with greater improvement in TST. Thirty (13.3%) patients experienced 51 short-term complications including malpositioned catheter (3 cases), intracranial hemorrhage (2), transient neurological deficit (19), permanent neurological deficit (3), symptomatic perilesional edema (6), hydrocephalus (1), CSF leakage (1), wound infection (2), unplanned ICU stay (5), and unplanned 30-day readmission (9). The relative incidence of complications was higher in the hypothalamic target location. Target volume, number of laser trajectories, number or size of thermal lesions, or use of perioperative steroids did not have a significant effect on short-term complications., Conclusions: SLA appears to be an effective and well-tolerated treatment option for children with DRE. Large-volume prospective studies are needed to better understand the indications for treatment and demonstrate the long-term efficacy of SLA in this population.
- Published
- 2023
- Full Text
- View/download PDF
39. Malus toringoides (Rehd.) Hughes Ameliorates Nonalcoholic Fatty Liver Disease with Diabetes via Downregulation of SREBP-1c and the NF- κ B Pathway In Vivo and In Vitro .
- Author
-
Xie M, Gao L, Liu Z, Yuan R, Zhuoma D, Tsering D, Wang Y, Huang S, and Li B
- Subjects
- Humans, Rats, Animals, Sterol Regulatory Element Binding Protein 1 genetics, Sterol Regulatory Element Binding Protein 1 metabolism, NF-kappa B genetics, NF-kappa B metabolism, Down-Regulation, Liver metabolism, Lipid Metabolism, Non-alcoholic Fatty Liver Disease drug therapy, Non-alcoholic Fatty Liver Disease genetics, Non-alcoholic Fatty Liver Disease metabolism, Malus metabolism, Diabetes Mellitus, Type 2 complications, Diabetes Mellitus, Type 2 drug therapy, Diabetes Mellitus, Type 2 genetics
- Abstract
Diabetic patients are more prone to developing nonalcoholic fatty liver disease (NAFLD) compared with healthy people. As a plant homologous to both medicine and food, Malus toringoides (Rehd.) Hughes has been used as an intervention for both NAFLD and diabetes. However, the effect and mechanism of M. toringoides on NAFLD on type 2 diabetes mellitus (T2DM) is unclear. The current investigation was designed to evaluate the ameliorative effects and mechanism of M. toringoides ethanol extract (CBTM-E375) on T2DM, and to identify the compounds in these extracts. The effects of CBTM-E375 on T2DM were verified using a high-fat diet-/streptozotocin-induced diabetic rat and free fatty acid (0.5 mM)-induced human hepatocellular carcinoma cell (HepG2) models. The components of CBTM-E375 were identified by high performance liquid chromatography-mass spectrometry/mass spectrometry. Our results demonstrate that CBTM-E375 ameliorated lipid accumulation (total cholesterol, triglyceride), oxidative stress (superoxide dismutase, catalase, malondialdehyde, glutathione peroxidase), and inflammation (tumor necrosis factor-α [TNF- α ], interleukin [IL]-1 β , IL-6, C-reactive protein [CRP]) in vivo and in vitro , these effects were associated with a CBTM-E375-mediated downregulation of SREBP-1c (sterol regulatory element binding protein 1c) and the NF- κ B (nuclear factor κ B) signaling pathway. A total of 20 chemical compounds were identified in CBTM-E375, including phlorizin, isoquercitrin, chlorogenic acid, quercetin, naringenin, and trigonelline, which have been reported to have positive effects on diabetes or on NAFLD.
- Published
- 2022
- Full Text
- View/download PDF
40. Fluorescence "Turn-Off" and Colorimetric Sensor for Fe 2+ , Fe 3+ , and Cu 2+ Ions Based on a 2,5,7-Triarylimidazopyridine Scaffold.
- Author
-
Sasan S, Chopra T, Gupta A, Tsering D, Kapoor KK, and Parkesh R
- Abstract
Two cyanoimidazopyridine-based sensors (SS1 and SS2) were explored for the colorimetric and fluorometric detection of Fe
2+ , Fe3+ , and Cu2+ ions in the semi-aqueous medium. The "turn-off" fluorescence response of both sensors to these ions was due to the restriction in internal charge transfer. Job's plot and semi-empirical calculations revealed that SS1 and SS2 complexed with Cu2+ ions in a 1:1 ratio and Fe2+/3+ ions in a 2:1 ratio, respectively. The sensors were found to have high binding constant ( Ka ) values and low detection limit values. FMO analysis using the semi-empirical quantum mechanics method revealed the decrease in energy gap after complexation with metal ions. Sensor-coated filter paper strips were prepared and analyzed, where the color changes in the strips could be utilized for the real-time detection of Fe2+ , Fe3+ , and Cu2+ ions., Competing Interests: The authors declare no competing financial interest., (© 2022 The Authors. Published by American Chemical Society.)- Published
- 2022
- Full Text
- View/download PDF
41. Pediatric thalamic incidentalomas: an international retrospective multicenter study.
- Author
-
Kozyrev DA, Soleman J, Tsering D, Keating RF, Hersh DS, Boop FA, Spennato P, Cinalli G, Tamburrini G, Thomale UW, Bollo RJ, Chatterjee S, Lalgudi Srinivasan H, Constantini S, and Roth J
- Abstract
Objective: Widespread use of modern neuroimaging has led to a surge in diagnosing pediatric brain incidentalomas. Thalamic lesions have unique characteristics such as deep location, surgical complexity, and proximity to eloquent neuronal structures. Currently, the natural course of incidental thalamic lesions is unknown. Therefore, the authors present their experience in treating such lesions., Methods: A retrospective, international multicenter study was carried out in 8 tertiary pediatric centers from 5 countries. Patients were included if they had an incidental thalamic lesion suspected of being a tumor and were diagnosed before the age of 20 years. Treatment strategy, imaging characteristics, pathology, and the outcome of operated and unoperated cases were analyzed., Results: Overall, 58 children (23 females and 35 males) with a mean age of 10.8 ± 4.0 years were included. The two most common indications for imaging were nonspecific reasons (n = 19; e.g., research and developmental delay) and headache unrelated to small thalamic lesions (n = 14). Eleven patients (19%) underwent early surgery and 47 were followed, of whom 10 underwent surgery due to radiological changes at a mean of 11.4 ± 9.5 months after diagnosis. Of the 21 patients who underwent surgery, 9 patients underwent resection and 12 underwent biopsy. The two most frequent pathologies were pilocytic astrocytoma and WHO grade II astrocytoma (n = 6 and n = 5, respectively). Three lesions were high-grade gliomas., Conclusions: The results of this study indicate that pediatric incidental thalamic lesions include both low- and high-grade tumors. Close and long-term radiological follow-up is warranted in patients who do not undergo immediate surgery, as tumor progression may occur.
- Published
- 2021
- Full Text
- View/download PDF
42. Quantitative outcomes of endoscopic strip craniectomy for metopic craniosynostosis in children with severe trigonocephaly.
- Author
-
Lajthia O, Rogers GF, Tsering D, Keating RF, and Magge SN
- Subjects
- Cephalometry, Child, Craniotomy, Female, Humans, Infant, Male, Retrospective Studies, Treatment Outcome, Craniosynostoses diagnostic imaging, Craniosynostoses surgery
- Abstract
Purpose: To assess intermediate-term (> 3 years) outcomes of endoscopic strip craniectomy with postoperative helmet therapy (ESC + HT) for the treatment of infants with severe trigonocephaly., Methods: This retrospective study examined cranial morphology of consecutive patients with severe trigonocephaly treated with minimally invasive ESC + HT. Preoperative and follow-up clinical parameters were collected from patient charts. Interfrontal divergence angle (IFDA), a validated and accurate measure of forehead narrowing, was measured on preoperative CT scans and on preoperative and postoperative 2D photographs., Results: Seven patients (4 male, 3 female) were included with a mean age at surgery of 2.76 months (range 1.8 to 4.1 months) and mean clinical follow-up of 3.71 years (photographic follow-up 2.73 years). The mean operative time was 91.4 min, with a mean estimated blood loss (EBL) of 57.1 ml and mean hospital length of stay of 1.14 days. IFDA improved from 118.8° to 135.9° (p < 0.01), with the mean final measurement falling within normal limits. The head circumference percentile was not significantly changed in follow-up. There was a statistically significant improvement in the inner-to-outer canthal distance ratio (p = 0.01) in follow-up, showing an improvement in hypotelorism. There were no dural tears, CSF leaks, infections, or other significant surgical morbidities, and there were no serious complications related to the use of helmet therapy. All patients achieved excellent aesthetic results judged by photographic comparison., Conclusion: This study demonstrated that patients treated with ESC + HT for metopic craniosynostosis showed measurable and significant improvement in forehead shape. This technique is a safe and effective alternative to more invasive surgical interventions.
- Published
- 2021
- Full Text
- View/download PDF
43. Cerebellar mutism syndrome: current approaches to minimize risk for CMS.
- Author
-
Cobourn K, Marayati F, Tsering D, Ayers O, Myseros JS, Magge SN, Oluigbo CO, and Keating RF
- Subjects
- Child, Humans, Postoperative Complications epidemiology, Postoperative Complications etiology, Postoperative Complications prevention & control, Retrospective Studies, Cerebellar Diseases diagnostic imaging, Cerebellar Diseases epidemiology, Cerebellar Diseases etiology, Cerebellar Neoplasms surgery, Medulloblastoma surgery, Mutism epidemiology, Mutism etiology, Mutism prevention & control
- Abstract
Purpose: Cerebellar mutism syndrome (CMS) is a serious source of morbidity following posterior fossa surgery in the pediatric population. However, methods for effectively decreasing its incidence and impact remain unclear. It is our aim to examine the impact of adjusting surgical factors, namely the use of a telovelar approach and avoidance of cavitronic ultrasonic aspirator, on the incidence of CMS in our population as well as outlining potential pre-, intra-, and postoperative factors that may contribute to its development., Methods: Retrospective review was performed to identify patients undergoing posterior fossa surgery for resection of a medulloblastoma. Demographic, surgical, and postoperative data were collected. These data were analyzed for possible correlations to the risk of developing CMS via univariate analysis. For factors found to be significant, a multivariate analysis was performed to assess their independence., Results: Seven of 65 patients (10.8%) developed CMS postoperatively. Factors found to be significantly associated with a higher risk of CMS were the degree of retraction utilized during the procedure (p = 0.0000) and incision of the vermis (p = 0.0294). Although they did not reach the threshold of statistical significance, tumor vascularity (p = 0.19), adoption of a transvermian approach (p = 0.19), and lack of intraoperative imaging (p = 0.17) exhibited strongly suggestive trends towards a correlation with CMS., Discussion: In an effort to reduce the incidence and severity of CMS in our population, our institution adopted surgical practices that minimize tissue trauma and mitigate postoperative edema. This included the use of a telovelar over a transvermian approach to obviate the need for vermian incision, avoidance of the CUSA, and minimization of heavy retraction during surgery. This was successful in reducing the incidence of CMS from 39% in our medulloblastoma patients to 10.8%. The development of CMS after posterior fossa surgery appears to be a "two-hit" phenomenon requiring a combination of existing predisposition, surgical injury, and postoperative exacerbation. Therefore, it is critical to identify the factors involved at each stage and investigate treatments to target them appropriately.
- Published
- 2020
- Full Text
- View/download PDF
44. Magnetic resonance-guided stereotactic laser ablation therapy for the treatment of pediatric brain tumors: a multiinstitutional retrospective study.
- Author
-
Arocho-Quinones EV, Lew SM, Handler MH, Tovar-Spinoza Z, Smyth M, Bollo R, Donahue D, Perry MS, Levy ML, Gonda D, Mangano FT, Storm PB, Price AV, Couture DE, Oluigbo C, Duhaime AC, Barnett GH, Muh CR, Sather MD, Fallah A, Wang AC, Bhatia S, Patel K, Tarima S, Graber S, Huckins S, Hafez DM, Rumalla K, Bailey L, Shandley S, Roach A, Alexander E, Jenkins W, Tsering D, Price G, Meola A, Evanoff W, Thompson EM, and Brandmeir N
- Abstract
Objective: This study aimed to assess the safety and efficacy of MR-guided stereotactic laser ablation (SLA) therapy in the treatment of pediatric brain tumors., Methods: Data from 17 North American centers were retrospectively reviewed. Clinical, technical, and radiographic data for pediatric patients treated with SLA for a diagnosis of brain tumor from 2008 to 2016 were collected and analyzed., Results: A total of 86 patients (mean age 12.2 ± 4.5 years) with 76 low-grade (I or II) and 10 high-grade (III or IV) tumors were included. Tumor location included lobar (38.4%), deep (45.3%), and cerebellar (16.3%) compartments. The mean follow-up time was 24 months (median 18 months, range 3-72 months). At the last follow-up, the volume of SLA-treated tumors had decreased in 80.6% of patients with follow-up data. Patients with high-grade tumors were more likely to have an unchanged or larger tumor size after SLA treatment than those with low-grade tumors (OR 7.49, p = 0.0364). Subsequent surgery and adjuvant treatment were not required after SLA treatment in 90.4% and 86.7% of patients, respectively. Patients with high-grade tumors were more likely to receive subsequent surgery (OR 2.25, p = 0.4957) and adjuvant treatment (OR 3.77, p = 0.1711) after SLA therapy, without reaching significance. A total of 29 acute complications in 23 patients were reported and included malpositioned catheters (n = 3), intracranial hemorrhages (n = 2), transient neurological deficits (n = 11), permanent neurological deficits (n = 5), symptomatic perilesional edema (n = 2), hydrocephalus (n = 4), and death (n = 2). On long-term follow-up, 3 patients were reported to have worsened neuropsychological test results. Pre-SLA tumor volume, tumor location, number of laser trajectories, and number of lesions created did not result in a significantly increased risk of complications; however, the odds of complications increased by 14% (OR 1.14, p = 0.0159) with every 1-cm3 increase in the volume of the lesion created., Conclusions: SLA is an effective, minimally invasive treatment option for pediatric brain tumors, although it is not without risks. Limiting the volume of the generated thermal lesion may help decrease the incidence of complications.
- Published
- 2020
- Full Text
- View/download PDF
45. Pediatric posterior fossa incidentalomas.
- Author
-
Kozyrev DA, Constantini S, Tsering D, Keating R, Basal S, and Roth J
- Subjects
- Adolescent, Adult, Child, Child, Preschool, Female, Humans, Retrospective Studies, Young Adult, Astrocytoma, Brain Neoplasms diagnostic imaging, Cerebellar Neoplasms, Medulloblastoma
- Abstract
Purpose: Pediatric brain incidentalomas are increasingly being diagnosed. As the posterior fossa (PF) is the location of most brain tumors in children, lesions of this region are of special interest. Currently, the natural history of incidental lesions in the PF is unknown. We present our experience treating such lesions., Methods: A retrospective study was carried out in two large tertiary pediatric centers. Patients were included if they had an incidental PF lesion suspected of being a tumor, and diagnosed before the age of 20 years. We analyzed treatment strategy, pathology, and outcome of operated and non-operated cases., Results: Seventy children (31 females) with a mean age of 8.4 ± 6.1 years were included. The three most common indications for imaging were headaches (16, assumed to be unrelated to the lesions), workup of unrelated conditions (14), and unspecified reasons (14). Twenty-seven patients (39%) were operated immediately, and 43 followed, of which 12 were eventually operated due to radiological changes, 28.9 ± 16.2 months after diagnosis. The most commonly found pathology was pilocytic astrocytomas (21 of 39 operated cases). Almost 10% were found to be malignant tumors including medulloblastomas (5) and ATRT (1)., Conclusion: Incidental PF lesions in children include both benign and malignant tumors. While certain lesions may be followed, others may require surgical treatment. Specific treatment decisions are based on initial radiological appearance, change in radiological characteristics over time, location, and evolving symptoms. The surgical risks must be balanced vis-à-vis the risk of missing a high-grade tumor and the very rare risk of malignant transformation.
- Published
- 2020
- Full Text
- View/download PDF
46. Quantification of Head Shape from Three-Dimensional Photography for Presurgical and Postsurgical Evaluation of Craniosynostosis.
- Author
-
Porras AR, Tu L, Tsering D, Mantilla E, Oh A, Enquobahrie A, Keating R, Rogers GF, and Linguraru MG
- Subjects
- Child, Child, Preschool, Craniosynostoses diagnostic imaging, Craniosynostoses pathology, Craniotomy methods, Female, Head diagnostic imaging, Humans, Imaging, Three-Dimensional, Infant, Infant, Newborn, Male, Photography, Preoperative Care methods, Retrospective Studies, Skull abnormalities, Skull diagnostic imaging, Craniosynostoses surgery, Head abnormalities
- Abstract
Background: Evaluation of surgical treatment for craniosynostosis is typically based on subjective visual assessment or simple clinical metrics of cranial shape that are prone to interobserver variability. Three-dimensional photography provides cheap and noninvasive information to assess surgical outcomes, but there are no clinical tools to analyze it. The authors aim to objectively and automatically quantify head shape from three-dimensional photography., Methods: The authors present an automatic method to quantify intuitive metrics of local head shape from three-dimensional photography using a normative statistical head shape model built from 201 subjects. The authors use these metrics together with a machine learning classifier to distinguish between patients with (n = 266) and without (n = 201) craniosynostosis (aged 0 to 6 years). The authors also use their algorithms to quantify objectively local surgical head shape improvements on 18 patients with presurgical and postsurgical three-dimensional photographs., Results: The authors' methods detected craniosynostosis automatically with 94.74 percent sensitivity and 96.02 percent specificity. Within the data set of patients with craniosynostosis, the authors identified correctly the fused sutures with 99.51 percent sensitivity and 99.13 percent specificity. When the authors compared quantitatively the presurgical and postsurgical head shapes of patients with craniosynostosis, they obtained a significant reduction of head shape abnormalities (p < 0.05), in agreement with the treatment approach and the clinical observations., Conclusions: Quantitative head shape analysis and three-dimensional photography provide an accurate and objective tool to screen for head shape abnormalities at low cost and avoiding imaging with radiation and/or sedation. The authors' automatic quantitative framework allows for the evaluation of surgical outcomes and has the potential to detect relapses., Clinical Question/level of Evidence: Diagnostic, I.
- Published
- 2019
- Full Text
- View/download PDF
47. Experimental Studies of Inter-Rater Agreement in Traditional Chinese Medicine: A Systematic Review.
- Author
-
Jacobson E, Conboy L, Tsering D, Shields M, McKnight P, Wayne PM, and Schnyer R
- Subjects
- Diagnosis, Differential, Humans, Reproducibility of Results, Clinical Trials as Topic standards, Medicine, Chinese Traditional, Observer Variation
- Abstract
Objectives: It has been recommended that clinical trials of Traditional Chinese Medicine (TCM) would be more ecologically valid if its characteristic mode of diagnostic reasoning were integrated into their design. In that context, however, it is also widely held that demonstrating a high level of agreement on initial TCM diagnoses is necessary for the replicability that the biomedical paradigm requires for the conclusions from such trials. Our aim was to review, summarize, and critique quantitative experimental studies of inter-rater agreement in TCM, and some of their underlying assumptions. Design: Systematic electronic searches were conducted for articles that reported a quantitative measure of inter-rater agreement across a number of rating choices based on examinations of human subjects in person by TCM practitioners, and published in English language peer-reviewed journals. Publications in languages other than English were not included, nor those appearing in other than peer-reviewed journals. Predefined categories of information were extracted from full texts by two investigators working independently. Each article was scored for methodological quality. Outcome measures: Design features across all studies and levels of inter-rater agreement across studies that reported the same type of outcome statistic were compared. Results: Twenty-one articles met inclusion criteria. Fourteen assessed inter-rater agreement on TCM diagnoses, two on diagnostic signs found upon traditional TCM examination, and five on novel rating schemes derived from TCM theory and practice. Raters were students of TCM colleges or graduates of TCM training programs with 3 or more years experience and licensure. Type of outcome statistic varied. Mean rates of pairwise agreement averaged 57% (median 65, range 19-96) across the 9 studies reporting them. Mean Cohen's kappa averaged 0.34 (median 0.34, range 0.07-0.59) across the seven studies reporting them. Meta-analysis was not possible due to variations in study design and outcome statistics. High risks of bias and confounding, and deficits in statistical reporting were common. Conclusions: With a few exceptions, the levels of agreement were low to moderate. Most studies had significant deficits of both methodology and reporting. Results overall suggest a few design features that might contribute to higher levels of agreement. These should be studied further with better experimental controls and more thorough reporting of outcomes. In addition, methods of complex systems analysis should be explored to more adequately model the relationship between clinical outcomes, and the series of diagnoses and treatments that are the norm in actual TCM practice.
- Published
- 2019
- Full Text
- View/download PDF
48. A comparison of endoscopic strip craniectomy and pi craniectomy for treatment of sagittal craniosynostosis.
- Author
-
Magge SN, Bartolozzi AR, Almeida ND, Tsering D, Myseros JS, Oluigbo CO, Rogers GF, and Keating RF
- Abstract
Objective: Sagittal craniosynostosis is managed with a wide variety of operative strategies. The current investigation compares the clinical outcomes of two widely performed techniques: pi craniectomy and minimally invasive endoscopic strip craniectomy (ESC) followed by helmet therapy., Methods: This IRB-approved retrospective study examined patients diagnosed with nonsyndromic, single-suture sagittal craniosynostosis treated with either pi craniectomy or ESC. Included patients had a minimum postoperative follow-up of 5 months., Results: Fifty-one patients met the inclusion criteria (pi 21 patients, ESC 30 patients). Compared to patients who underwent ESC, the pi patients were older at the time of surgery (mean age 5.06 vs 3.11 months). The mean follow-up time was 23.2 months for ESC patients and 31.4 months for pi patients. Initial cranial index (CI) was similar between the groups, but postoperatively the ESC patients experienced a 12.3% mean increase in CI (from 0.685 to 0.767) compared to a 5.34% increase for the pi patients (from 0.684 to 0.719), and this difference was statistically significant (p < 0.001). Median hospital length of stay (1 vs 2 days) and operative duration (69.5 vs 93.3 minutes) were significantly less for ESC (p < 0.001 for both). The ESC patients showed a trend toward better results when surgery was done at younger ages. Craniectomy width in ESC cases was positively associated with CI improvement (slope of linear regression = 0.69, p = 0.026)., Conclusions: While both techniques effectively treated sagittal craniosynostosis, ESC showed superior results compared to pi craniectomy. ESC showed a trend for better outcomes when done at younger ages, although the trend did not reach statistical significance. A wider craniectomy width (up to 2 cm) was associated with better outcomes than smaller craniectomy widths among the ESC patients.
- Published
- 2019
- Full Text
- View/download PDF
49. Quantitative evaluation of local head malformations from three-dimensional photography: application to craniosynostosis.
- Author
-
Tu L, Porras AR, Oh A, Lepore N, Buck GC, Tsering D, Enquobahrie A, Keating R, Rogers GF, and Linguraru MG
- Abstract
The evaluation of head malformations plays an essential role in the early diagnosis, the decision to perform surgery and the assessment of the surgical outcome of patients with craniosynostosis. Clinicians rely on two metrics to evaluate the head shape: head circumference (HC) and cephalic index (CI). However, they present a high inter-observer variability and they do not take into account the location of the head abnormalities. In this study, we present an automated framework to objectively quantify the head malformations, HC, and CI from three-dimensional (3D) photography, a radiation-free, fast and non-invasive imaging modality. Our method automatically extracts the head shape using a set of landmarks identified by registering the head surface of a patient to a reference template in which the position of the landmarks is known. Then, we quantify head malformations as the local distances between the patient's head and its closest normal from a normative statistical head shape multi-atlas. We calculated cranial malformations, HC, and CI for 28 patients with craniosynostosis, and we compared them with those computed from the normative population. Malformation differences between the two populations were statistically significant (p<0.05) at the head regions with abnormal development due to suture fusion. We also trained a support vector machine classifier using the malformations calculated and we obtained an improved accuracy of 91.03% in the detection of craniosynostosis, compared to 78.21% obtained with HC or CI. This method has the potential to assist in the longitudinal evaluation of cranial malformations after surgical treatment of craniosynostosis.
- Published
- 2019
- Full Text
- View/download PDF
50. Radiation-free quantification of head malformations in craniosynostosis patients from 3D photography.
- Author
-
Tu L, Porras AR, Oh A, Lepore N, Mastromanolis M, Tsering D, Paniagua B, Enquobahrie A, Keating R, Rogers GF, and Linguraru MG
- Abstract
The evaluation of cranial malformations plays an essential role both in the early diagnosis and in the decision to perform surgical treatment for craniosynostosis. In clinical practice, both cranial shape and suture fusion are evaluated using CT images, which involve the use of harmful radiation on children. Three-dimensional (3D) photography offers non-invasive, radiation-free, and anesthetic-free evaluation of craniofacial morphology. The aim of this study is to develop an automated framework to objectively quantify cranial malformations in patients with craniosynostosis from 3D photography. We propose a new method that automatically extracts the cranial shape by identifying a set of landmarks from a 3D photograph. Specifically, it registers the 3D photograph of a patient to a reference template in which the position of the landmarks is known. Then, the method finds the closest cranial shape to that of the patient from a normative statistical shape multi-atlas built from 3D photographs of healthy cases, and uses it to quantify objectively cranial malformations. We calculated the cranial malformations on 17 craniosynostosis patients and we compared them with the malformations of the normative population used to build the multi-atlas. The average malformations of the craniosynostosis cases were 2.68 ± 0.75 mm, which is significantly higher (p<0.001) than the average malformations of 1.70 ± 0.41 mm obtained from the normative cases. Our approach can support the quantitative assessment of surgical procedures for cranial vault reconstruction without exposing pediatric patients to harmful radiation.
- Published
- 2018
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.