- ICH GCP
- 미국 임상 시험 레지스트리
- 임상시험 NCT01099189
Vein Histology in Arteriovenous Fistulas and Its Effect on Fistula Surgery Success
A Cohort Study of the Histopathological Changes Evident in Vein Wall at the Time of Arteriovenous Dialysis Access Fistulas and the Effects of Such Changes on Biomechanical Compliance and Patient's Clinical Outcomes in a University Teaching Hospital.
Patients whose kidneys have failed need to receive dialysis treatment, most commonly with a dialysis machine. In order to be connected to the machine an operation is often performed to join an artery to a vein in the arm. This forms what is known as an arteriovenous fistula. The fistula causes an increase in the flow of blood through the vein and the vein reacts to this by becoming bigger and thicker, making it easier to connect the patient to the machine.
The success rate for the operation is relatively low and only approximately 65 from every 100 operations is still working after a year. It is thought that one factor that may cause problems with the fistula is the ability of the vein to stretch in response to increased blood flow. Previous research has shown that veins in kidney failure patients look different to those of people whose kidneys are working when viewed under a microscope.
The investigators aim to study the structure of the vein that is used in making fistulas with a microscope and also to test it in an engineering laboratory to see how much it will stretch. The investigators hope that gaining information about the structure of the vein and its ability to stretch will help determine what it is about the vein that affects how well it works as part of a fistula. This information may help surgeons select the best possible vein in a given patient to give the best chance of a working fistula in the future.
연구 개요
연구 유형
등록 (실제)
연락처 및 위치
연구 장소
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Yorkshire
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Hull, Yorkshire, 영국, HU3 2JZ
- Academic Vascular Surgery Unit
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참여기준
자격 기준
공부할 수 있는 나이
건강한 자원 봉사자를 받아들입니다
연구 대상 성별
샘플링 방법
연구 인구
설명
Inclusion Criteria:
- Patients referred to vascular consultants for AV fistula formation for haemodialysis access.
- Ability to give informed written consent
- Aged over 18 at time of referral
Exclusion Criteria:
- Veins identified on preoperative ultrasound scanning to be of a calibre too small to allow sufficient material to be obtained for biomechanical testing (<3mm diameter).
- Inability to give informed written consent
- Aged under 18 at time of referral
- Inability to attend follow-up appointments
공부 계획
연구는 어떻게 설계됩니까?
디자인 세부사항
코호트 및 개입
그룹/코호트 |
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Observed cohort
All patients recruited.
Observed for clinical outcomes
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연구는 무엇을 측정합니까?
주요 결과 측정
결과 측정 |
측정값 설명 |
기간 |
---|---|---|
Primary failure of access - Immediate/early thrombosis or failure to mature.
기간: within 30 days of formation
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Failure to mature or thrombosis of fistula
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within 30 days of formation
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2차 결과 측정
결과 측정 |
기간 |
---|---|
Duplex findings of evidence of stenosis and correlation to compliance or histological findings
기간: 6 months
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6 months
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Correlation between biomechanical compliance and histological measures of pre existing venous pathology
기간: 6 months
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6 months
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Correlation between biomechanical compliance testing and clinical outcomes
기간: 6 months
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6 months
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Assisted primary and secondary patency rates at 3 and 6 months post fistula formation
기간: 6 months
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6 months
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Functional primary patency
기간: 6 months
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6 months
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공동 작업자 및 조사자
수사관
- 수석 연구원: Ian C Chetter, MBChB FRCS, University of Hull
간행물 및 유용한 링크
연구 기록 날짜
연구 주요 날짜
연구 시작
기본 완료 (실제)
연구 완료 (실제)
연구 등록 날짜
최초 제출
QC 기준을 충족하는 최초 제출
처음 게시됨 (추정)
연구 기록 업데이트
마지막 업데이트 게시됨 (실제)
QC 기준을 충족하는 마지막 업데이트 제출
마지막으로 확인됨
추가 정보
이 정보는 변경 없이 clinicaltrials.gov 웹사이트에서 직접 가져온 것입니다. 귀하의 연구 세부 정보를 변경, 제거 또는 업데이트하도록 요청하는 경우 register@clinicaltrials.gov. 문의하십시오. 변경 사항이 clinicaltrials.gov에 구현되는 즉시 저희 웹사이트에도 자동으로 업데이트됩니다. .
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