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Flow dysfunction of hemodialysis vascular access: a randomized controlled trial on the effectiveness of surveillance of arteriovenous fistulas and grafts

Flow dysfunction of hemodialysis vascular access: a randomized controlled trial on the effectiveness of surveillance of arteriovenous fistulas and grafts - FLOW

Status
Active, not recruiting
Phases
Unknown
Study type
Observational
Source
NL-OMON
Registry ID
NL-OMON54091
Enrollment
375
Registered
2020-11-21
Start date
2021-11-01
Completion date
Unknown
Last updated
2026-01-27

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

Conditions

end-stage renal disease Vascular access renal dialysis

Interventions

Intervention group: Patients are referred for correction of the underlying stenosis when clinical signs of flow dysfunction are present. These include physical signs, problems during dialysis, or an

Sponsors

Maastricht Universitair Medisch Centrum +
Lead Sponsor

Eligibility

Age
18 Years to 64 Years

Inclusion criteria

Inclusion criteria: 1. Adult patients aged 18 years or older. 2. End-stage renal disease with unlikely recovery of kidney function according to the attending nephrologist. 3. Arteriovenous fistula or arteriovenous graft as hemodialysis vascular access that fulfills both of the following criteria at the time of trial enrollment: a. Vascular access flow volume of at least 500mL/min; and b. Functional vascular access: the vascular access was cannulated with 2 needles and achieved the prescribed access circuit flow in at least 6 dialysis sessions over the past 30 days. Patients who have single needle hemodialysis for reasons other than vascular access dysfunction (e.g. for nocturnal hemodialysis) but who can be cannulated with 2 needles for flow measurements and fulfill the other requirements for a functional vascular access can be enrolled as well. 4. Planning to remain in one of the participating dialysis centers for at least 1 year.

Exclusion criteria

Exclusion criteria: 1. Arteriovenous fistulas with multiple venous outflow paths upstream of the cannulation sites, that are not suitable for flow volume measurements using ultrasound dilution (e.g. Gracz fistulas and Ellipsys or WavelinQ endovascular fistulas). 2. Home hemodialysis. 3. Thrombosis of the current vascular access in the past year. 4. Planned access-related intervention. 5. Living donor kidney transplantation, switch to peritoneal dialysis, or switch to home hemodialysis planned within 6 months. 6. Life expectancy of less than 6 months, in the opinion of the attending nephrologist. 7. Unable to provide informed consent.

Design outcomes

Primary

MeasureTime frame
The primary outcome is the access-related intervention rate.

Secondary

MeasureTime frame
Secondary outcome measures are complications, medical and societal costs, patient-reported outcomes, and the quality of the surveillance program.

Countries

Netherlands

Contacts

Public ContactMGJ Snoeijs

Maastricht Universitair Medisch Centrum +

maarten.snoeijs@mumc.nl0433872727

Outcome results

None listed

Source: NL-OMON (via WHO ICTRP) · Data processed: Feb 3, 2026