31 results on '"Smeets M"'
Search Results
2. Automatic 3D dense phenotyping provides reliable and accurate shape quantification of the human mandible.
- Author
-
Verhelst, Pieter-Jan, Matthews, H., Verstraete, L., Van der Cruyssen, F., Mulier, D., Croonenborghs, T. M., Da Costa, O., Smeets, M., Fieuws, S., Shaheen, E., Jacobs, R., Claes, P., Politis, C., and Peeters, H.
- Subjects
PHENOTYPES ,MANDIBLE injuries ,STANDARD deviations ,EUCLIDEAN distance ,INTRACLASS correlation - Abstract
Automatic craniomaxillofacial (CMF) three dimensional (3D) dense phenotyping promises quantification of the complete CMF shape compared to the limiting use of sparse landmarks in classical phenotyping. This study assesses the accuracy and reliability of this new approach on the human mandible. Classic and automatic phenotyping techniques were applied on 30 unaltered and 20 operated human mandibles. Seven observers indicated 26 anatomical landmarks on each mandible three times. All mandibles were subjected to three rounds of automatic phenotyping using Meshmonk. The toolbox performed non-rigid surface registration of a template mandibular mesh consisting of 17,415 quasi landmarks on each target mandible and the quasi landmarks corresponding to the 26 anatomical locations of interest were identified. Repeated-measures reliability was assessed using root mean square (RMS) distances of repeated landmark indications to their centroid. Automatic phenotyping showed very low RMS distances confirming excellent repeated-measures reliability. The average Euclidean distance between manual and corresponding automatic landmarks was 1.40 mm for the unaltered and 1.76 mm for the operated sample. Centroid sizes from the automatic and manual shape configurations were highly similar with intraclass correlation coefficients (ICC) of > 0.99. Reproducibility coefficients for centroid size were < 2 mm, accounting for < 1% of the total variability of the centroid size of the mandibles in this sample. ICC's for the multivariate set of 325 interlandmark distances were all > 0.90 indicating again high similarity between shapes quantified by classic or automatic phenotyping. Combined, these findings established high accuracy and repeated-measures reliability of the automatic approach. 3D dense CMF phenotyping of the human mandible using the Meshmonk toolbox introduces a novel improvement in quantifying CMF shape. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
3. EQUSUM: Endometriosis QUality and grading instrument for SUrgical performance: proof of concept study for automatic digital registration and classification scoring for r-ASRM, EFI and Enzian.
- Author
-
Metzemaekers, J, Haazebroek, P, Smeets, M J G H, English, J, Blikkendaal, M D, Twijnstra, A R H, Adamson, G D, Keckstein, J, and Jansen, F W
- Subjects
ENDOMETRIOSIS ,METHODOLOGY - Abstract
STUDY QUESTION Is electronic digital classification/staging of endometriosis by the EQUSUM application more accurate in calculating the scores/stages and is it easier to use compared to non-digital classification? SUMMARY ANSWER We developed the first digital visual classification system in endometriosis (EQUSUM). This merges the three currently most frequently used separate endometriosis classification/scoring systems (i.e. revised American Society for Reproductive Medicine (rASRM), Enzian and Endometriosis Fertility Index (EFI)) to allow uniform and adequate classification and registration, which is easy to use. The EQUSUM showed significant improvement in correctly classifying/scoring endometriosis and is more user-friendly compared to non-digital classification. WHAT IS KNOWN ALREADY Endometriosis classification is complex and until better classification systems are developed and validated, ideally all women with endometriosis undergoing surgery should have a correct rASRM score and stage, while women with deep endometriosis (DE) should have an Enzian classification and if there is a fertility wish, the EFI score should be calculated. STUDY DESIGN, SIZE, DURATION A prospective endometriosis classification proof of concept study under experts in deep endometriosis was conducted. A comparison was made between currently used non-digital classification formats for endometriosis versus a newly developed digital classification application (EQUSUM). PARTICIPANTS/MATERIALS, SETTING, METHODS A hypothetical operative endometriosis case was created and summarized in both non-digital and digital form. During European endometriosis expert meetings, 45 DE experts were randomly assigned to the classic group versus the digital group to provide a proper classification of this DE case. Each expert was asked to provide the rASRM score and stage, Enzian and EFI score. Twenty classic forms and 20 digital forms were analysed. Questions about the user-friendliness (system usability scale (SUS) and subjective mental effort questionnaire (SMEQ)) of both systems were collected. MAIN RESULTS AND THE ROLE OF CHANCE The rASRM stage was scored completely correctly by 10% of the experts in the classic group compared to 75% in the EQUSUM group (P < 0. 01). The rASRM numerical score was calculated correctly by none of the experts in the classic group compared with 70% in the EQUSUM group (P < 0.01). The Enzian score was correct in 60% of the classic group compared to 90% in the EQUSUM group (P = 0.03). EFI scores were calculated correctly in 25% of the classic group versus 85% in the EQUSUM group (P < 0.01). Finally, the usability measured with the SUS was significantly better in the EQUSUM group compared to the classic group: 80.8 ± 11.4 and 61.3 ± 20.5 (P < 0.01). Also the mental effort measured with the SMEQ was significant lower in the EQUSUM group compared to the classic group: 52.1 ± 18.7 and 71.0 ± 29.1 (P = 0.04). Future research should further develop and confirm these initial findings by conducting similar studies with larger study groups, to limit the possible role of chance. LIMITATIONS, REASONS FOR CAUTION These first results are promising, however it is important to note that this is a preliminary result of experts in DE and needs further testing in daily practice with different types (complex and easy) of endometriosis cases and less experienced gynaecologists in endometriosis surgery. WIDER IMPLICATIONS OF THE FINDINGS This is the first time that the rASRM, Enzian and EFI are combined in one web-based application to simplify correct and automatic endometriosis classification/scoring and surgical registration through infographics. Collection of standardized data with the EQUSUM could improve endometriosis reporting and increase the uniformity of scientific output. However, this requires a broad implementation. STUDY FUNDING/COMPETING INTEREST(S) To launch the EQUSUM application, a one-time financial support was provided by Medtronic to cover the implementation cost. No competing interests were declared. TRIAL REGISTRATION NUMBER N/A. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF
4. Flexible thin film solar cells on cellulose substrates with improved light management.
- Author
-
Smeets, M., Wilken, K., Bittkau, K., Aguas, H., Pereira, L., Fortunato, E., Martins, R., and Smirnov, V.
- Subjects
SOLAR cells ,CELLULOSE ,SURFACE texture ,CRYSTAL optics ,CURRENT density (Electromagnetism) ,ELECTRIC power conversion - Abstract
Cellulose substrates for PV applications present a fibrous surface texture that is not suitable for the uniform deposition of thin-film solar cells causing poor device performance. However, uniform thin-film deposition and efficient light management for solar cells can be achieved on cellulose substrates by transferring well-known surface textures that provide an adequate surface for thin film solar cell deposition and also, provide light scattering properties into the cellulose surface. In this work, we study the properties of crater-like textures transferred onto cellulose substrates by nanoimprint lithography and the corresponding effect on the J-V and EQE characteristics of amorphous silicon thin-film solar cells. The prototype solar cells are deposited on cellulose substrates and the results are compared with the results of such solar cells deposited on flat glass substrates. The results show that the J-V characteristics of solar cells deposited on planar as well as textured glass substrates are well reproduced. Due to the process routine, the solar cells on the cellulose substrate with nanoimprinted textures show an increase in the short circuit current density and power conversion efficiency over previous results in our laboratory. [ABSTRACT FROM AUTHOR]
- Published
- 2017
- Full Text
- View/download PDF
5. Post passivation light trapping back contacts for silicon heterojunction solar cells.
- Author
-
Smeets, M., Bittkau, K., Lentz, F., Richter, A., Ding, K., Carius, R., Rau, U., and Paetzold, U. W.
- Published
- 2016
- Full Text
- View/download PDF
6. Idarubicin DNA intercalation is reduced by MRP1 and not Pgp.
- Author
-
Smeets, M E P, Raymakers, R A P, Vierwinden, G, Pennings, A H M, Boezeman, J, Minderman, H, de Witte, T M, Smeets, M E, Raymakers, R A, and Pennings, A H
- Subjects
DRUG resistance ,GLYCOPROTEINS ,ANTINEOPLASTIC antibiotics ,CARRIER proteins ,CHEMICAL reagents ,COMPARATIVE studies ,DAUNOMYCIN ,ENERGY transfer ,FLOW cytometry ,FLUORESCENCE spectroscopy ,HETEROCYCLIC compounds ,RESEARCH methodology ,MEDICAL cooperation ,GENETIC mutation ,RESEARCH ,DNA-binding proteins ,EVALUATION research ,IDARUBICIN ,FLUORESCENT dyes ,CANCER cell culture ,PHARMACODYNAMICS - Abstract
Currently available data regarding the substrate specificity of the multi-drug resistance (MDR) mechanisms P-glycoprotein (Pgp) and MDR-associated protein (MRP1) for idarubicin are inconclusive. A multiparameter flow cytometry method was developed which allows simultaneous quantitative measurement of total cellular fluorescence and the amount of anthracyclines intercalated into the DNA. Anthracycline DNA intercalation was measured by fluorescence resonance energy transfer (FRET) between Hoechst 33342 and anthracyclines. Daunorubicin and idarubicin accumulation were studied and compared in established cell lines expressing Pgp and MRP1. The data demonstrate that daunorubicin DNA intercalation is affected by both Pgp and MRP1 whereas idarubicin DNA intercalation is affected only by MRP1. MRP1 and Pgp function could be blocked completely by 5 microM PAK 104P, while higher concentrations of verapamil, PSC 833 and cyclosporin A were necessary to attain complete blocking of MRP1 compared to Pgp. Daunorubicin DNA intercalation correlates better with cell survival and is more sensitive at physiological MDR expression as observed in hematopoietic progenitors than daunorubicin levels measured by total cellular fluorescence. In conclusion, idarubicin DNA intercalation is reduced by MRP1 but not by Pgp. PAK-104P is an effective modulator for both Pgp and MRP1 and may further improve idarubicin efficacy. [ABSTRACT FROM AUTHOR]
- Published
- 1999
- Full Text
- View/download PDF
7. Long-term treatment of transfusional iron overload with the oral iron chelator deferiprone (L1): a Dutch multicenter trial.
- Author
-
Kersten, M. J., Lange, R., Smeets, M. E. P., Vreugdenhil, G., Roozendaal, K. J., Lameijer, W., Goudsmit, R., and Smeets, M E
- Abstract
We performed an open, nonrandomized, multicenter phase-II trial to evaluate the efficacy and toxicity of 1 year of treatment with the oral iron chelator deferiprone in 38 mainly nonthalassemic patients with transfusional iron overload. Initial serum ferritin varied between 996 and 11.644 micrograms/l. Patients were treated with 3-6 g of deferiprone daily. Mean urinary iron excretion (UIE) in 36 evaluable patients was 21.0 mg/24 h and was significantly higher in the patients with thalassemia than in those with myelodysplasia. Negative iron balance was achieved in 20 patients (56%). The median duration of treatment was 10 months; due to side effects and other causes only 20 patients completed 1 year of treatment. Mean serum ferritin levels decreased from 3563 micrograms/l at the start of the trial to 2767 micrograms/l at 6 months (26 patients, p < 0.004) and to 2186 micrograms/l at 12 months (20 patients, p < 0.005). Serum ferritin levels normalized in two patients who were no longer transfusion dependent. Deferiprone was clearly not effective in three patients (two with myelofibrosis, one with myelodysplasia). One patient with myelodysplasia developed agranulocytosis after 12 months of treatment; this was rapidly reversible after stopping deferiprone. Three patients had a mild and transient decrease in white blood cell count. Other side effects leading to withdrawal from the trial consisted mainly of nausea (3 patients), arthralgia (2), and skin rash (1). No clinical signs of zinc deficiency were seen, although zinc excretion was increased in three patients. No changes were seen in liver enzymes, creatinine, antinuclear factor, T-cell subsets, cardiac function, visual acuity, and audiogram. Although our results confirm deferiprone as an effective iron chelator in patients with thalassemia and in some patients with other forms of iron overload, there is still some concern about the safety of this drug, which therefore, at this time, should be used exclusively in well-controlled clinical trials. [ABSTRACT FROM AUTHOR]
- Published
- 1996
- Full Text
- View/download PDF
8. The low cycling status of mobilized peripheral blood CD34+ cells is not restricted to the more primitive subfraction.
- Author
-
Croockewit, A J, Raymakers, R A P, Smeets, M E P, Bosch, G vd, Pennings, A H M, de Witte, T J M, Raymakers, R A, Smeets, M E, vd Bosch, G, Pennings, A H, and de Witte, T J
- Subjects
HEMATOPOIETIC stem cell transplantation ,CELL cycle ,IMMUNOPHENOTYPING - Abstract
Mobilized peripheral blood progenitor cells (PBPC) have been shown to differ qualitatively from bone marrow (BM) progenitors. The released progenitor cells are predominantly in G0/G1 and show a relatively high percentage of rhodamine dull cells. Within the BM these last two features are characteristic of the more primitive progenitors. Although the mobilized PB cells can give rise to long-term repopulation and thus contain stem cells, the frequency of stem cells is not much higher if long-term initiating cell (LTC-IC) assays are used. To determine whether quiescent stem cells are selectively released or the low-cycle status of PB progenitors is related to the release from the BM microenvironment, the cell cycle status and rhodamine content in the PB and BM during mobilization were studied and compared with steady-state BM. More differentiated and more primitive progenitors were separated based on differentiation markers and cloned in single cell assay. In mobilized PB 54% of the CD34+ cells (n=5) were rhodamine dull compared to 22% in steady-state BM (P=0.014) [n=6]. The percentage of CD34+ cells in the S/G2M phases of the cell cycle was 2.1% in the mobilized PB (n=11), and 18% in steady-state BM (n=11) [P=0.002]. During mobilization the fraction of cells in the S/G2M phase of the cell cycle was 16% in BM (n=7), similar to steady-state BM (P=0.34). The released progenitors represented a selection of BM progenitors, with significantly more primitive progenitors (CD34+/13+/33dim) and less lymphoid precursors (CD34+/19+). Within the more differentiated CD34+113+/33bright, myelomonocytic precursors, both in PB as well as in BM, the percentage S/G2M was relatively higher than in the CD34+/13+/33dim subfraction: in normal BM: median 18% vs 8% (P=0.006) [n=8]; in mobilized PB 3% vs 2% (P=0.03) [n=10]; and in BM during mobilization 24% vs 7% (P=0.01) [n=6]. The cycle status of mobilized PB progenitors was low both in the primitive and more differentiated subfractions. During the mobilization period the BM progenitors are cycling as in steady-state BM. The low-cycle status of the mobilized PB progenitors may be related to the loss of contact with the micro-environment. [ABSTRACT FROM AUTHOR]
- Published
- 1998
- Full Text
- View/download PDF
9. Contact resistance measurement for Au bumped IC to ITO on glass for LCD's.
- Author
-
Beckers, L., Schiepers, E., Raes, M., Smeets, M., and van der Lugt, A.
- Published
- 2005
- Full Text
- View/download PDF
10. A novel measuring method of testing ITO protective coatings for use in mobile phone LCD's.
- Author
-
Raes, M.H.W. and Smeets, M.
- Published
- 2005
- Full Text
- View/download PDF
11. Disorder improves nanophotonic light trapping in thin-film solar cells.
- Author
-
Paetzold, U. W., Smeets, M., Meier, M., Bittkau, K., Merdzhanova, T., Smirnov, V., Michaelis, D., Waechter, C., Carius, R., and Rau, U.
- Subjects
HYDROGENATED amorphous silicon ,NANOPHOTONICS ,SOLAR cells ,GLASS ,THIN film devices - Abstract
The article presents a systematic experimental study on the impact of disorder in advanced nanophotonic light-trapping concepts of thin-film solar cells, and mentions that, for the study, thin-film solar cells made of hydrogenated amorphous silicon were prepared on imprint-textured glass superstrates. As mentioned, the result of the study is ideal for the large field of research on nanophotonic light trapping in thin-film solar cells.
- Published
- 2014
- Full Text
- View/download PDF
12. Danger Signals in the Initiation of the Inflammatory Response after Myocardial Infarction.
- Author
-
de Haan, J. J., Smeets, M. B., Pasterkamp, G., and Arslan, F.
- Subjects
INFLAMMATION ,MYOCARDIAL infarction ,IMMUNE system ,LEUCOCYTES ,CELLULAR signal transduction ,MITOCHONDRIAL DNA - Abstract
During myocardial infarction, sterile inflammation occurs. The danger model is a solid theoretic framework that explains this inflammation as danger associated molecular patterns activate the immune system. The innate immune system can sense danger signals through different pathogen recognition receptors (PRR) such as toll-like receptors, nod-like receptors and receptors for advanced glycation endproducts. Activation of a PRR results in the production of cytokines and the recruitment of leukocytes to the site of injury. Due to tissue damage and necrosis of cardiac cells, danger signals such as extracellular matrix (ECM) breakdown products, mitochondrial DNA, heat shock proteins and high mobility box 1 are released. Matricellular proteins are non-structural proteins expressed in the ECM and are upregulated upon injury. Some members of the matricellular protein family (like tenascin-C, osteopontin, CCN1 and the galectins) have been implicated in the inflammatory and reparative responses following myocardial infarction and may function as danger signals. In a clinical setting, danger signals can function as prognostic and/or diagnostic biomarkers and for drug targeting. In this review we will provide an overview of the established knowledge on the role of danger signals in myocardial infarction and we will discuss areas of interest for future research. [ABSTRACT FROM AUTHOR]
- Published
- 2013
- Full Text
- View/download PDF
13. Vaginal cuff dehiscence in laparoscopic hysterectomy: influence of various suturing methods of the vaginal vault.
- Author
-
Blikkendaal, M., Twijnstra, A., Pacquee, S., Rhemrev, J., Smeets, M., Kroon, C., and Jansen, F.
- Abstract
Vaginal cuff dehiscence (VCD) is a severe adverse event and occurs more frequently after total laparoscopic hysterectomy (TLH) compared with abdominal and vaginal hysterectomy. The aim of this study is to compare the incidence of VCD after various suturing methods to close the vaginal vault. We conducted a retrospective cohort study. Patients who underwent TLH between January 2004 and May 2011 were enrolled. We compared the incidence of VCD after closure with transvaginal interrupted sutures versus laparoscopic interrupted sutures versus a laparoscopic single-layer running suture. The latter was either bidirectional barbed or a running vicryl suture with clips placed at each end commonly used in transanal endoscopic microsurgery. Three hundred thirty-one TLHs were included. In 75 (22.7 %), the vaginal vault was closed by transvaginal approach; in 90 (27.2 %), by laparoscopic interrupted sutures; and in 166 (50.2 %), by a laparoscopic running suture. Eight VCDs occurred: one (1.3 %) after transvaginal interrupted closure, three (3.3 %) after laparoscopic interrupted suturing and four (2.4 %) after a laparoscopic running suture was used ( p = .707). With regard to the incidence of VCD, based on our data, neither a superiority of single-layer laparoscopic closure of the vaginal cuff with an unknotted running suture nor of the transvaginal and the laparoscopic interrupted suturing techniques could be demonstrated. We hypothesise that besides the suturing technique, other causes, such as the type and amount of coagulation used for colpotomy, may play a role in the increased risk of VCD after TLH. [ABSTRACT FROM AUTHOR]
- Published
- 2012
- Full Text
- View/download PDF
14. Twenty-first century laparoscopic hysterectomy: should we not leave the vaginal step out?
- Author
-
Twijnstra, A., Kianmanesh Rad, N., Smeets, M., Admiraal, J., and Jansen, F.
- Abstract
The objective of this study was to compare surgical outcomes for laparoscopically assisted vaginal hysterectomy (LAVH) with total laparoscopic hysterectomy (TLH) in three teaching hospitals in the Netherlands. This study is a multicenter cohort retrospective analysis of consecutive cases (Canadian Task Force classification II-2). One hundred and four women underwent a laparoscopic hysterectomy between March 1995 and March 2005 at one of three teaching hospitals. This included 37 women who underwent LAVH and 67 who underwent TLH. Blood loss, operating time, and intraoperative complications such as bladder or ureteric injury as well as conversion to an open procedure were recorded. In the TLH group, average age was statistically significant lower, as well as the mean parity, whereas estimated uterus size was statistically significant larger, compared to the LAVH group. Main indication in both groups was dysfunctional uterine bleeding. In the TLH group, mean blood loss (173 mL) was significant lower compared to the LAVH group (457 mL), whereas length of surgery, uterus weight, and complication rates were comparable between the two groups. The method of choice at the start of the study period was LAVH, and by the end of the study period, it had been superceded by TLH. LAVH should not be regarded as the novice’s laparoscopic hysterectomy. Moreover, with regard blood loss, TLH shows advantages above LAVH. This might be due to the influence of the altered anatomy in the vaginal stage of the LAVH procedure. Therefore, when a vaginal hysterectomy is contraindicated, TLH is the procedure of choice. LAVH remains indicated in case of vaginal hysterectomy with accompanying adnexal surgery. [ABSTRACT FROM AUTHOR]
- Published
- 2009
- Full Text
- View/download PDF
15. The clinical relevance of hysteroscopic polypectomy in premenopausal women with abnormal uterine bleeding.
- Author
-
Van Dongen, H., Janssen, C. A. H., Smeets, M. J. G. H., Emanuel, M. H., and Jansen, F. W.
- Subjects
UTERUS ,HYSTERECTOMY ,PERIMENOPAUSE ,DISEASES in women ,PATIENT satisfaction ,WOUNDS & injuries - Abstract
This study assessed the efficacy of hysteroscopic polyp removal in the management of abnormal uterine bleeding (AUB) of premenopausal patients. The monthly menstrual blood loss, measured semi-objectively by the pictorial blood loss assessment chart (PBAC) and patients satisfaction were recorded prospectively preoperatively and postoperatively. Twenty-one patients were included. Median monthly PBAC-score before treatment was 288 (range 142–670) and 6 months after polyp removal 155 (range 39–560). It was concluded that hysteroscopic polyp removal in premenopausal women with AUB reduces the monthly blood loss significantly and has a high satisfaction rate on the short term. [ABSTRACT FROM AUTHOR]
- Published
- 2009
- Full Text
- View/download PDF
16. The mannose cap of mycobacterial lipoarabinomannan does not dominate the Mycobacterium–host interaction.
- Author
-
Appelmelk, B. J., Den Dunnen, J., Driessen, N. N., Ummels, R., Pak, M., Nigou, J., Larrouy-Maumus, G., Gurcha, S. S., Movahedzadeh, F., Geurtsen, J., Brown, E. J., Smeets, M. M. Eysink, Besra, G. S., Willemsen, P. T. J., Lowary, T. L., Van Kooyk, Y., Maaskant, J. J., Stoker, N. G., Van Der Ley, P., and Puzo, G.
- Subjects
MANNOSE ,MONOSACCHARIDES ,MYCOBACTERIUM ,GLYCOLIPIDS ,GLYCOCONJUGATES ,MYCOBACTERIA ,LUNG diseases ,CYTOKINES ,DENDRITIC cells - Abstract
Pathogenic mycobacteria have the ability to persist in phagocytic cells and to suppress the immune system. The glycolipid lipoarabinomannan (LAM), in particular its mannose cap, has been shown to inhibit phagolysosome fusion and to induce immunosuppressive IL−10 production via interaction with the mannose receptor or DC-SIGN. Hence, the current paradigm is that the mannose cap of LAM is a crucial factor in mycobacterial virulence. However, the above studies were performed with purified LAM, never with live bacteria. Here we evaluate the biological properties of capless mutants of Mycobacterium marinum and M. bovis BCG, made by inactivating homologues of Rv1635c. We show that its gene product is an undecaprenyl phosphomannose-dependent mannosyltransferase. Compared with parent strain, capless M. marinum induced slightly less uptake by and slightly more phagolysosome fusion in infected macrophages but this did not lead to decreased survival of the bacteria in vitro, nor in vivo in zebra fish. Loss of caps in M. bovis BCG resulted in a sometimes decreased binding to human dendritic cells or DC-SIGN-transfected Raji cells, but no differences in IL-10 induction were observed. In mice, capless M. bovis BCG did not survive less well in lung, spleen or liver and induced a similar cytokine profile. Our data contradict the current paradigm and demonstrate that mannose-capped LAM does not dominate the Mycobacterium–host interaction. [ABSTRACT FROM AUTHOR]
- Published
- 2008
- Full Text
- View/download PDF
17. Assessment of ocular and nasal irritation in asthmatics resulting from fragrance exposure.
- Author
-
Opiekun, R.E., Smeets, M., Sulewski, M., Rogers, R., Prasad, N., Vedula, U., and Dalton, P.
- Subjects
ASTHMATICS ,ALLERGIES - Abstract
Summary Background Many asthmatics report worsening of symptoms following exposure to odours and sensory irritants commonly found in household and cosmetic products. Despite this, little evidence exists to confirm the degree to which such subjective reports are correlated with localized, objective changes in the upper or lower airways following a fragranced product exposure. Objective Subjective symptom reports were compared to objective measures in mild asthmatics, moderate asthmatics and non-asthmatics following exposure to one of two fragranced household aerosol mixtures and a clean air control condition to determine if asthmatics reported greater subjective symptoms of nasal congestion or exhibited objective measures of elevated ocular irritation and nasal congestion following exposure than did healthy controls. Methods Measures of nasal mucosal swelling, using acoustic rhinometry, and photographic assessments of ocular hyperemia, using macro-photography, were taken before exposure, immediately after an initial 5-min exposure and again following a 30-min exposure to either of two, fragranced aerosol products and a clean air control. Self-reports of nasal patency at each time-point were also obtained. Results Although moderate asthmatics tended to report more nasal congestion following fragranced product exposure than did non-asthmatics, no exposure-related changes in ocular redness or nasal mucosal swelling were observed among the three groups. Spirometry readings also failed to show evidence of any exposure-related changes in pulmonary function. Conclusion Despite claims that exposure to fragranced products may trigger ocular and respiratory symptoms among asthmatics, we found no evidence that 30 min of exposure to one of two fragranced aerosols elicited objective adverse effects in the ocular or nasal mucosa of mild and moderate asthmatics. While physiological mechanisms of fragrance impact may yet be responsible for some of the adverse reports among asthmatics following fragrance exposure, such reports may also reflect a non-physiological locus of symptom perception triggered by other sensory cues. [ABSTRACT FROM AUTHOR]
- Published
- 2003
- Full Text
- View/download PDF
18. Cyclosporin increases cellular idarubicin and idarubicinol concentrations in relapsed or refractory AML mainly due to reduced systemic clearance.
- Author
-
Smeets, M, Raymakers, R, Muus, P, Vierwinden, G, Linssen, P, Masereeuw, R, and de Witte, T
- Subjects
GRANULOCYTE-colony stimulating factor ,MYELOID leukemia ,ANTINEOPLASTIC agents ,COMPARATIVE studies ,CYCLOSPORINE ,DAUNOMYCIN ,IMMUNOSUPPRESSIVE agents ,LONGITUDINAL method ,RESEARCH methodology ,MEDICAL cooperation ,RESEARCH ,DISEASE relapse ,PILOT projects ,EVALUATION research ,ACUTE diseases ,IDARUBICIN ,PHARMACODYNAMICS - Abstract
The feasibility of adding both the multidrug resistance modulator cyclosporin (CsA) and granulocyte colony-stimulating factor (G-CSF) to a standard salvage regimen of idarubicin (IDA) and cytarabine was evaluated in patients with resistant or relapsed acute myeloid leukemia and myelodysplastic syndrome. Three patients received IDA 12 mg/m2/day, the next four patients 9 mg/m2/day. The dose of CsA was 16 mg/kg/day. Six patients showed Pgp expression and none MRP1 expression. Grade III or IV toxicity (CTC-NCIC criteria) was registered in six patients for gastrointestinal, two patients for cardiovascular and one patient for neurological complications. Three patients died in hypoplasia and three patients showed leukemic regrowth. Three control patients were treated with IDA 12 mg/m2/day and cytarabine, but no CsA and G-CSF. The plasma IDA and idarubicinol (ida-ol) area under the curve's of patients treated with IDA 12 mg/m2 plus CsA were higher (P< 0.05) than in controls. Cellular IDA concentrations were almost similar, but cellular ida-ol concentrations were significantly higher (P < 0.05) in the presence of CsA than in controls. We conclude that the toxicity either with IDA 12 or 9 mg/m2/day was too high. The modulating effect of CsA was mainly based on changes in plasma kinetics of IDA and ida-ol, although ida-ol cellular clearance was delayed in the presence of CsA. [ABSTRACT FROM AUTHOR]
- Published
- 2001
- Full Text
- View/download PDF
19. NESTING OF THE VILLAGE WEAVER PLOCEUS CUCULLATUS.
- Author
-
CAMARA-SMEETS, M. DA
- Published
- 1982
- Full Text
- View/download PDF
20. MR imaging in retinoblastoma.
- Author
-
Barkhof, F., Smeets, M., Valk, P., Tan, K., Hoogenraad, F., Peeters, J., Valk, J., van der Valk, P, and Tan, K E
- Abstract
We studied the appearance of retinoblastoma on unenhanced and gadolinium-enhanced images and the accuracy of tumour staging with MR imaging. The MR images were obtained in 18 children with retinoblastoma and compared with histopathological findings after enucleation. The MR imaging included T1-weighted and dual-echo T2-weighted images before, and T1-weighted images after, gadopentetate dimeglumine injection. The contrast between tumour and ipsilateral vitreous strongly increased (57 %) after gadolinium on T1-weighted images (p = 0.004). Tumour was strongly hypointense as compared with ipsilateral vitreous in all patients using heavily T2-weighted (TE = 120 ms) images (p = 0.001). The estimated T2 of tumour (mean 96 + 14 ms) did not correlate with histological grading or degree of calcification. Unenhanced T1-weighted MR images rightfully excluded extrascleral growth in 16 of 16 cases, but its presence was confirmed after enucleation in only one of 2 abnormal MR scans. Invasion of the optic nerve behind the cribriform plate was confirmed in 2 of 3 abnormal gadolinium-enhanced MR scans, but also in 1 of the 15 cases in which MR images were normal. The T2-weighted images were useful in assessing retinal detachment. We conclude that heavily T2-weighted images, unenhanced T1-weighted images and gadolinium-enhanced T1-weighted MR images are complementary in characterizing and staging retinoblastoma. [ABSTRACT FROM AUTHOR]
- Published
- 1997
- Full Text
- View/download PDF
21. Iron Chelators May Enhance Erythropoiesis by Increasing Iron Delivery to Haematopoietic Tissue and Erythropoietin Response in Iron-Loading Anaemia.
- Author
-
Vreugdenhil, G., Smeets, M., Feelders, R.A., and van Eijk, H.G.
- Published
- 1993
- Full Text
- View/download PDF
22. Use of Fluorescence in Situ Hybridization to Measure Chromosome Aberrations as a Predictor of Radiosensitivity in Human Tumour Cells.
- Author
-
Coco-Martin, J. M., Smeets, M. F. M. A., Poggensee, M., Mooren, E., Hofland, I., Brug, M. van den, Ottenheim, C., Bartelink, H., and Begg, A. C.
- Published
- 1994
- Full Text
- View/download PDF
23. Radiation-induced DNA Damage and Repair in Radiosensitive and Radioresistant Human Tumour Cells Measured by Field Inversion Gel Electrophoresis.
- Author
-
Smeets, M. F. M. A., Mooren, E. H. M., and Begg, A. C.
- Published
- 1993
- Full Text
- View/download PDF
24. Distinct levels of relationships between tospovirus isolates.
- Author
-
Ávila, A., Haan, P., Smeets, M., Resende, R., Kormelink, R., Kitajima, E., Goldbach, R., and Peters, D.
- Abstract
The taxonomic relations of a number of tospovirus isolates, collected in different geographical areas and from different host plants, were studied. To delineate these isolates, properties such as susceptibility of a limited range of host plants, symptomatology, cytopathology, nucleocapsid composition, serology of their nucleocapsid proteins, and nucleotide sequence homology were compared. The results show that isolates which have previously been discriminated as members of three different serogroups, should in fact be regarded as representatives of at least three distinct virus species in the tospovirus genus. [ABSTRACT FROM AUTHOR]
- Published
- 1993
- Full Text
- View/download PDF
25. Cosmetic result of lower midline laparotomy wounds: polybutester and nylon skin suture in a randomized clinical trial.
- Author
-
Trimbos, J Baptist, Smeets, Maddie, Verdel, Marion, Hermans, Jo, Trimbos, J B, Smeets, M, Verdel, M, and Hermans, J
- Published
- 1993
26. The diagnostic and therapeutic approach of a primary bilateral leiomyoma of the ovaries: a case report and a literature review.
- Author
-
Esch, E., Wijngaarden, S., Schaafsma, H., Smeets, M., and Rhemrev, J.
- Subjects
OVARIAN tumors ,SMOOTH muscle tumors ,LAPAROSCOPY ,ABDOMINAL pain ,FROZEN tissue sections ,UTERINE fibroids ,ADNEXA uteri - Abstract
Introduction: A primary fibroid (leiomyoma) arising from both ovaries is rare and can be difficult to diagnose as a result of the low incidence and its indistinctive presentation. A literature review on the diagnostic and therapeutic approach of this rare benign tumour is presented. We describe a case of bilateral primary ovarian fibroid with an unusual presentation to illustrate our recommendations for treatment. Case presentation: A 37-year-old woman was admitted with symptoms of acute severe abdominal pain. She had a history of faint abdominal discomfort. Due to the acute deterioration of the abdominal pain a diagnostic laparoscopy was performed. A tumour arising from both ovaries was seen and a biopsy was taken in order to decide on further therapy. Histology showed a fibroid for which excision by a second laparoscopic intervention was planned. Due to excessive adhesions conversion to laparotomy was necessary. Conclusion: We recommend that in the case of an abnormal adnexal mass, particularly in women who want to preserve their fertility, frozen section histology be performed laparoscopically. A frozen section diagnostic procedure, instead of a regular biopsy, seems to be a useful tool during an elective diagnostic laparoscopic procedure in order to prevent potential morbidity as a result of possible future laparoscopy or even laparotomy. Previous laparoscopic procedures can cause massive adhesions that could impede a subsequent laparoscopic approach. [ABSTRACT FROM AUTHOR]
- Published
- 2011
- Full Text
- View/download PDF
27. Determinants of extended door-to-needle time in acute ischemic stroke and its influence on in-hospital mortality: results of a nationwide Dutch clinical audit.
- Author
-
Kuhrij, Laurien S., Marang-van de Mheen, Perla J., van den Berg-Vos, Renske M., de Leeuw, Frank-Erik, Nederkoorn, Paul J., on behalf of the Dutch Acute Stroke Audit consortium, Lingsma, H. F., de Borst, G. J., van Norden, A. G. W., Eysink Smeets, M. M., Aerden, L. A. M., Alblas, C. L., de Beer, F., Bienfait, H. P., Boon, A. E., Bor, S., Boreas, A. M. H. P., Bronner, I., Brouns, R., and Brouwers, P. J. A. M.
- Subjects
HOSPITAL mortality ,STROKE ,LOGISTIC regression analysis ,THROMBOLYTIC therapy - Abstract
Background: Intravenous thrombolysis (IVT) plays a prominent role in the treatment of acute ischemic stroke (AIS). The sooner IVT is administered, the higher the odds of a good outcome. Therefore, registering the in-hospital time to treatment with IVT, i.e. the door-to-needle time (DNT), is a powerful way to measure quality improvement. The aim of this study was to identify determinants that are associated with extended DNT.Methods: Patients receiving IVT in 2015 and 2016 registered in the Dutch Acute Stroke Audit were included. DNT and onset-to-door time (ODT) were dichotomized using the median (i.e. extended DNT) and the 90th percentile (i.e. severely extended DNT). Logistic regression was performed to identify determinants associated with (severely) extended DNT/ODT and its effect on in-hospital mortality. A linear model with natural spline was used to investigate the association between ODT and DNT.Results: Included were 9518 IVT treated patients from 75 hospitals. Median DNT was 26 min (IQR 20-37). Determinants associated with a higher likelihood of extended DNT were female sex (OR 1.17, 95% CI 1.05-1.31) and admission during off-hours (OR 1.12, 95% CI 1.01-1.25). Short ODT correlated with longer DNT, whereas longer ODT correlated with shorter DNT. Young age (OR 1.38, 95% CI 1.07-1.76) and admission to a comprehensive stroke center (OR 1.26, 1.10-1.45) were associated with severely extended DNT, which was associated with in-hospital mortality (OR 1.54, 95%CI 1.19-1.98).Conclusions: Even though DNT in the Netherlands is short compared to other countries, lowering the DNT may be achievable by focusing on specific subgroups. [ABSTRACT FROM AUTHOR]- Published
- 2019
- Full Text
- View/download PDF
28. EP26.04: MRI-ultrasound fusion imaging for diagnosis of deep infiltrating endometriosis: a critical appraisal.
- Author
-
Berger, J., Henneman, O., Rhemrev, J., Smeets, M., and Jansen, F.
- Subjects
DIAGNOSIS of endometriosis ,MAGNETIC resonance imaging - Published
- 2017
- Full Text
- View/download PDF
29. Yersinia enterocolitica associated diarrhoea in a neonate.
- Author
-
Jacobs, J., Smeets, M., Eggermont, E., and Vandepitte, J.
- Published
- 1989
- Full Text
- View/download PDF
30. Bilateral Hydronephrosis with Urosepsis due to Neglected Pessary.
- Author
-
Meinhardt, W., Schuitemaker, N. W. E., Smeets, M. J. G. H., and Venema, P. L.
- Published
- 1993
- Full Text
- View/download PDF
31. An evaluation of the efficiency of the combined sewer-wastewater treatment system under transient conditions
- Author
-
Vanrolleghem, P., Bauwens, W., and Smeets, M.
- Subjects
ACTIVATED sludge process ,PERFORMANCE evaluation - Published
- 1996
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.