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AVF Stenosis by Electronic Stethoscope

Detection and Prediction of the Stenosis of Arteriovenous Fistula in Hemodialysis Patients by an Electronic Stethoscope

Status
Completed
Phases
Unknown
Study type
Observational
Source
ClinicalTrials.gov
Registry ID
NCT07436559
Enrollment
30
Registered
2026-02-27
Start date
2023-03-17
Completion date
2023-09-30
Last updated
2026-08-04

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

End Stage Renal Disease (ESRD)

Keywords

Electronic stethostope, Arteriovenous fistula, Regression analysis, Hemodialysis

Brief summary

The prevalence rate of hemodialysis in Taiwan is the highest in the world, and the number of new cases of hemodialysis and the death rate are gradually increasing every year. Long-term hemodialysis patients must receive dialysis through the arteriovenous fistula. If the arteriovenous fistula is narrowed, the dialysis effect will be poor or the dialysis will not be possible due to blockage, resulting in complications and mortality. The detection of the arteriovenous fistula must rely on the assistance of professionals. \* Is it easier for clinicians to detect arteriovenous fistula stenosis by an electronic stethoscope? This study uses an electronic stethoscope to take the hemodialysis center of Douliu District, Yunlin Branch of National Taiwan University Hospital as the experimental site. Select 30 patients who need long-term dialysis, adults (20-99 years old) who have been on dialysis for more than 3 months and have arteriovenous fistula. The experiment period lasted for 3 months, and each person received 2-3 voices per week, about 1080 voices. The main purpose is to use the electronic stethoscope and the experience of traditional professionals, hoping to detect and predict the stenosis in advance. The important key factors of vascular access stenosis in hemodialysis patients were found through regression analysis of the Albumin value and clinical data obtained from routine treatment of patients of a fixed blood test in monthly hemodialysis center.

Interventions

DEVICEDetection and Prediction of the stenosis of arteriovenous fistula in hemodialysis patients by an electronic stethoscope

The detection of the arteriovenous fistula must rely on the assistance of professionals by palpation or a conventional stethoscope. This study will investigate the detection and prediction of arteriovenous fistula stenosis in hemodialysis patients by an electronic stethoscope.

Sponsors

National Taiwan University Hospital
Lead SponsorOTHER

Study design

Observational model
OTHER
Time perspective
PROSPECTIVE

Eligibility

Sex/Gender
ALL
Age
20 Years to 99 Years
Healthy volunteers
No

Inclusion criteria

* Age 20-99 years - Chronic hemodialysis ≥3 months - Functional arteriovenous fistula (AVF) - Ability to provide informed consent

Exclusion criteria

* Arteriovenous graft (AVG) - Central venous catheter (Permcath) - Vulnerable populations unable to consent

Design outcomes

Primary

MeasureTime frameDescription
AVF stenosisFrom enrollment to the end of study at 3 monthsClinical stenosis: Diagnosed by attending nephrologist based on physical examination abnormalities (high-pitched bruit, pulsatile flow, diminished thrill) - Confirmed by Doppler ultrasound showing \>50% diameter reduction - Intervention: Percutaneous transluminal angioplasty (PTA)

Secondary

MeasureTime frameDescription
Abnormal AVF sound thresholdFrom enrollment to the end of study at 3 monthsDefined using statistical analysis of post-PTA normal sounds

Countries

Taiwan

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Aug 5, 2026