Dialysis Access Salvage
A dialysis fistula or graft is a lifeline, and every new one uses up a limited number of possible sites. When an access starts to fail — poor flow, high venous pressures, prolonged bleeding after needling — the narrowing responsible can usually be found and stretched open with a balloon through a pinhole, preserving the access rather than replacing it.
Dr. Mohamed El Ghobashy · Consultant Interventional Radiologist
What it treats
- •Falling flow rates or inadequate clearance on dialysis
- •High venous pressure alarms during a dialysis session
- •Prolonged bleeding from needle sites after dialysis
- •A fistula that has clotted off (thrombosed access)
- •A swollen arm from central vein narrowing on the access side
- •A fistula that has never matured enough to be needled
Who is a candidate?
- Dialysis patients whose access is underperforming on the unit's monitoring
- Patients with a recently clotted fistula or graft — the sooner the better
- Patients with a fistula that has failed to mature
- Patients needing a tunnelled dialysis catheter while access is created or repaired
How the procedure works
- 1
Fistulogram
Contrast is injected into the access under local anaesthetic to map the whole circuit from the artery to the central veins and find the narrowing.
- 2
Angioplasty
A balloon is passed across the stenosis and inflated to stretch it open. High-pressure or drug-coated balloons are used where the narrowing is resistant.
- 3
Declotting
If the access has thrombosed, the clot is cleared mechanically or pharmacologically first, and then the underlying stenosis that caused it is treated.
- 4
Confirmation
A completion fistulogram shows restored flow, and a thrill is checked before the patient leaves.
Recovery
This is a day-case procedure and the access can usually be needled for dialysis very soon afterwards — often at the next scheduled session. Bruising at the puncture is common. Narrowings do tend to recur, so accesses are monitored and repeat angioplasty is a normal part of keeping a fistula alive for years rather than a sign of failure.
Discuss this procedure
Private consultations and procedures are at Andalusia Hospitals, Maadi. Kasr Al-Ainy is Dr. El Ghobashy's academic post at Cairo University and does not take private cases.
Frequently asked questions
Why not just create a new fistula?
Because sites are finite. Every patient has a limited number of veins suitable for access, and each new fistula also needs months to mature. Salvaging a working access preserves both the site and the time.
How quickly should a clotted fistula be treated?
Urgently — the sooner after clotting, the higher the chance of salvage. If your dialysis unit finds the access has stopped working, it should be referred the same day rather than waiting for a routine slot.
Will I need this done again?
Quite possibly. The narrowings that threaten dialysis access tend to return, so planned surveillance and repeat angioplasty are how a fistula is kept working long term. That is expected management, not a complication.
Other procedures
This page is general information, not medical advice for an individual. Whether a procedure suits you depends on your imaging, your history and an in-person assessment.