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 14 of 14 for “"arteriovenous fistula"”.
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Pathology of uremic vascular diseases: calciphylaxis and arteriovenous fistula
… and the most effective approach is through arteriovenous fistula (AVF). AVF connects an artery and vein to increase the blood flow needed for hemodialysis treatment. However, complications, such as stenosis of AVF portends a bad prognosis for patients. This study focuses on the …
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Clinical Outcomes after Endovascular Management for Non-maturing Native Arteriovenous Fistula
목적: 미성숙 자가동정맥루에서 시행한 혈관 내 치료의 성공률과 개통률을 평가하고 개통률에 영향을 미치는 인자들을 알아보고자 한다. 대상과 방법: 2006년 1월부터 2011년 3월까지 불충분한 자가동정맥루 성숙으로 혈관 내치료를 시행 받은 141명을 대상으로 후향적으로 진행하였다. 혈관 내 치료 후 개통률은 Kaplan-Meier techinique을 통해 추정하였다. 환자의 연령, 성별, 동반이환 질환, 동정맥루 종류, 동정맥루 형성 기간, 협착부위의 개수, 협착 정도, 우회정맥 치료 여부에 따른 1차개통률의 차이를 …
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Pre-operative Risk Factors for Arteriovenous Fistula Failure in the Haemodialysis Population
The arteriovenous fistula (AVF) is a lifeline for patients requiring renal replacement therapy, allowing repeated access to the high blood flow needed for haemodialysis. However, failure rates for AVFs remain high, at around 30-40 % after one-year, typically occluding secondary to stenosis. Many …
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Patient-specific computational haemodynamics in the arteriovenous fistula and aorta of a chronic kidney disease cohort
… for an efficient and repeatable procedure. An arteriovenous fistula (AVF) is widely considered the ‘gold-standard’ vascular access. However, AVFs suffer from poor patency rates, and their non-maturation is a key issue in failing cases. Localised haemodynamics and flow patterns are hypothesised …
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Comparison of Local Anesthetic Ointment to Warm Pack therapy for Pain relief during arteriovenous fistula puncture in Hemodialysis patients
본 연구는 혈액투석 환자의 동․정맥루 천자 시 국소마취제 연고와 온요법의 통증완화 효과를 비교 확인하기 위한 유사실험 연구이다. 연구대상은 경기도 소재 C 대학병원 인공신장실에서 혈액투석 시 동․정맥루 천자를 시행하는 말기신부전 환자로 아래 선정기준에 합당한 40명을 연구대상으로 편의표출 하였다. 그중 타 병원으로의 전원 3명, 혈관폐쇄로 중심정맥도관 삽입한 2명이 중도 탈락하여 35명만을 최종 분석 대상으로 하였다. 자료수집기간은 2010년 5월 3일부터 6월 5일까지이며 중재 전 동․정맥루 천자 시 통증점수와 생리적 지표를 …
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Numerical modelling of the Oldroyd-B fluid
… of a complex problem of blood flow in an arteriovenous fistula, using geometry acquired from MRI data. A resistance boundary condition is used for the outlets. The flow profiles obtained from using both the Newtonian and Oldroyd-B fluids are validated against velocity encoded MRI and also …
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Flow velocity measurement in haemodialysis access using 4D MRI
… upper arm), as well as three grafts and five fistulae underwent phase contrast MR angiography of the right upper arm with a Siemens Magnetom Symphony 1.5T MRI Scanner. Images were then processed using Supertool in Matlab, and flow velocities at predetermined points on the brachial artery and …
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A study of the complications associated with haemodialysis vascular access in patients with renal failure
… tree. This can be provided by creation of an arteriovenous fistula, insertion of a synthetic vascular graft or insertion of a central venous catheter. Established haemodialysis vascular access is associated with a number of important complications which can impact significantly on both the …
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ASSOCIATION OF INCIDENT DIALYSIS MODALITY WITH PATIENT SURVIVAL: A SYSTEMATIC REVIEW AND META-ANALYSIS
… HD vascular access (central venous catheter vs. arteriovenous fistula; p<0.01, only one study included). Conclusions: This meta-analysis suggests that overall PD and incentre HD likely carry equivalent survival benefits. However, differences were detected among subgroups based on age, geographic …
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Bioinspired soft matter self-assembly and its use in biomedical applications
… neointial hyperplasia (VNH) that often occurs at arteriovenous fistula (AVF) of patients who are undergoing dialysis therapy (Chapter 6). Overall, the studies included herein will contribute broad knowledge to the fundamental science and applications of self-assembled systems for biomedical tools …
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Fluid-structure interaction modelling of a patient-specific arteriovenous access fistula
… of the haemodynamics and vascular mechanics in arteriovenous shunts that are required for haemodialysis treatments. A combination of new PCMRA imaging and computational modelling of in vivo blood flow aims to determine the haemodynamic conditions that may lead to the high failure rate of …
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Long-term patency of nitinol stent placement in dysfunctional hemodialysis
… forearm), type of the hemodialysis shunt (native arteriovenous fistula [AVF] or arteriovenous graft [AVG]), and presence of stent fracture, were compared by Kaplan-Meier log-rank test. Results: The stents were placed in 26 central veins (31.3%), 40 upper arm veins (48.2%), 11 cubital veins …
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A clinical role for fluid dynamics modelling of arteriovenous fistulae
… remodelling in response to changes in flow. In arteriovenous fistulae (AVFs), formed as a vascular access for hemodialysis, rates of stenoses are very high. This is understood to be due to the unusual geometric configuration, in combination with supraphysiological flowrates. Significant …
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Pulsioximetría de pacientes en hemodiálisis, de la unidad de terapia renal – fundación cardioinfantil, análisis para establecer recomendaciones
Introducción. En Colombia, el 80% de los pacientes con enfermedad renal crónica en hemodiálisis tienen fístula arteriovenosa periférica (FAV) que asegura el flujo de sangre durante la hemodiálisis (1), la variabilidad en el flujo de sangre en el brazo de la FAV hacia la parte distal, puede afectar …