Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 70 for “"patency"”.
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Long-term patency of nitinol stent placement in dysfunctional hemodialysis
Purpose: To evaluate the long-term patency of stents placement on dysfunctional hemodialysis shunt after failed balloon angioplasty and analysis the factors affecting the patency of nitinol stent. Materials and methods: Eighty-three patients with dysfunctional dialysis shunts underwent bail-out …
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Ultrasonography Evaluation of Patency of Implanted Infra-Renal Vascular Grafts in the Rat Model.
… and invasive monitoring of experimental graft patency may contribute to pain, suffering, higher cost and earlier sacrifice. Non-invasive ultrasonographic evaluation of vascular implants during the conduction of animal studies allows for chronic follow-up with multiple assessments. This study …
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Market application of a novel stent-based patency monitor to the management of ischemic vascular disease
… approach for real-time monitoring of vessel patency at the site of coronary stents is proposed, will provide a measure of efficacy of stenting and of the pharmacologic regiment to mitigate the risk of vessel stenosis and narrowing due to the underlying. The purpose of this thesis is to …
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Effects of the Lubo cervical collar on airway patency in awake adults – A magnetic resonance imaging study
… as an airway adjuvant maintaining upper airway patency, reducing provider task loading. The limited research on the device efficacy and safety requires further investigation. Methods: A randomized , crossover, interventional study was performed to compare mean differences in airway patency at …
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In vitro endothelialization of vascular prostheses: a possible means to improve the early patency of small diameter vascular grafts
… pooled cells. After 16 days of implantation the patency rate of grafts of the endothelialized group was similar to that of the control group (55.5 vrs 61.1 %; p> 0.1). Scanning electron microscopy revealed that 44.4% of experimental grafts were completely free of endothelium, while the remaining …
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Cyclic stretch-mediated release of vascular endothelial growth factor by vascular smooth muscle cells : a role in improved vascular graft patency
In the light of studies which show the upregulation of VEGF in contractile cells subjected to cyclic stretch and the profound effects which cyclic stretch has been shown to have on the release of other cytokines by SMC, this study investigates the role which cyclic stretch might play in VEGF …
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The use of brachio-basilic arterio-venous fistulae for haemodialysis – a single centre descriptive study
… primary aim of the study was to report on access patency, including primary, assisted-primary and secondary patency at 30 days, 1 year and 3 years. The secondary aims were to report on complications and functional outcomes with this technique. Methods: This is a retrospective, descriptive study of …
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Determining ideal staple size for small intestinal surgery in cats
… pressures to determine percentage of vascular patency past the staple lines. Vascular patency was compared not only from pre-and post-staple segments of the same intestinal sample, but also EndoGIA vascular patency was evaluated against TA vascular patency. Results: Two cats met study criteria. …
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Retreatability of root canals obturated using a bioceramic sealer and gutta percha
… of achieving working length and apical patency when obturation is done with the master GP placed at working length and when it is short by 3mm. The time it took to achieve these parameters when it was possible to achieve them was also determined. The role of XP Endo Finisher R, a …
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Pattern and distribution of peripheral arterial disease in diabetic patients with critical limb ischemia (Rutherford Clinical Category 4-6)
… calculated minimum sample size of 63 limbs [756 patency levels (63x12)] was needed to achieve a power of 86% to detect a difference of 0.1900 (19%) with a target significance level of 0.05 (using PASS 11 software). The equality of distribution of categories was analyzed using the One sample …
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Ο ΕΛΕΓΧΟΣ ΤΗΣ ΚΥΚΛΟΦΟΡΙΑΣ ΤΩΝ ΚΑΤΩ ΑΚΡΩΝ ΠΡΟ ΚΑΙ ΜΕΤΑ ΤΑΣ ΑΡΤΗΡΙΟΠΛΑΣΤΙΚΑΣ ΕΠΕΜΒΑΣΕΙΣ ΔΙ' ΑΝΑΙΜΑΚΤΩΝ ΔΙΑΓΝΩΣΤΙΚΩΝ ΜΕΘΟΔΩΝ
… FLOW IN THE LOWER EXTREMITIES AS WELL AS THE PATENCY OR NON-PATENCY OF THE PROSTHESIS AND THE VIABILITY AND FUNCTIONAL CAPACITY OF THE PATIENTS LIMBS AFTER THE ARTERIOPLASTIC PROCEDURES.
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Stabilised decellularised vascular grafts in an ovine carotid model
… available synthetic grafts have unacceptably low patency rates, while autologous saphenous vein grafts are not feasible in one third of patients. Decellularised vascular grafts have been investigated as alternative conduits, but this chemical treatment results in degradation of the extracellular …
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Repeated full dose thrombolysis in patients hospitalised with myocardial infarction : safety and efficacy
… uniformly effective in securing or maintaining patency of the infarct-related artery.
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Advantages of MesoRex shunt compared with distal splenorenal shunt for extrahepatic portal vein occlusion in children
… the shunt success rate, defined as longterm patency at 24 months of the MesoRex shunt and distal splenorenal shunt, the factors that could have influenced the patency of the Rex vein and the effect of these procedures on the long-term synthetic liver function. Methods: This study followed a …
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Pre-operative Risk Factors for Arteriovenous Fistula Failure in the Haemodialysis Population
… ferritin and phosphate in 137 patients. AVF patency rates were also examined in this cohort. Decreased pre-operative levels of ferritin and increased phosphate were markers of interest due to association with AVF failure at 1-year. Known risk-factors such as gender and age showed no effect on …
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Η διασωλήνωση της δακρυϊκής οδού στους ενήλικες
… irrigation of the duct showed a decrease of the patency; however these 8 patients reported a subjective improvement of their epiphora. According to these results patency was achieved in 73% of the cases. If the cases with an obstruction of the nasolacrimal duct but without suppuration of the …
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The use of SurgiSIS, an acellular collagen matrix, in endoscopic urethroplasty
… assessed. The long term maintenance of urethral patency following this treatment from is assessed.
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Clinical Aspects on Chimney Stent Graft Technique in Endovascular Repair of the Aorta.
… diseases with high technical success and patency rate without major adverse effect. The treated patients with thoracic aortic lesions had 14% 30-day mortality, 21% type I endoleak, 7% CG-related mortality, 98% secondary patency and 68% of the aortic lesions shrank significantly. Visceral …
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