How do I know if my access is failing?

Warning signs include reduced blood flow rates during dialysis, difficulty placing needles, prolonged bleeding after needle removal, swelling of the arm, a change in the sound or feel of the access (it should have a strong, smooth thrill), and high venous pressures during dialysis sessions. Report any of these to your dialysis nurse and contact your vascular surgeon promptly.

How quickly can a clotted access be treated?

Thrombosis of a dialysis access should be treated urgently — ideally within 24 to 48 hours. The longer a clot sits, the more difficult it is to remove and the less likely the access is to be salvaged. If your dialysis center identifies a clotted access, contact us immediately.

How many angioplasty procedures can a fistula or graft tolerate?

There is no fixed limit to the number of angioplasty procedures an access can receive. Repeated dilation of a stenosis is common and can maintain access function for many years. However, rapidly recurrent stenosis despite multiple dilations may indicate that stenting or surgical revision would offer a more durable long-term result. Your vascular surgeon will help you evaluate when intervention is warranted versus when continued angioplasty remains the right approach.

What happens if my access cannot be saved?

If an access is irreparably damaged or repeatedly fails despite intervention, a new access will need to be created. This is planned in advance whenever possible to avoid dependence on a temporary catheter. Your vascular surgeon will evaluate your remaining options based on your anatomy.

Does VWI coordinate with my dialysis center?

Yes. We work closely with nephrologists and dialysis center staff to coordinate care, share surveillance data, and ensure rapid response when access problems arise. Our goal is to keep you on schedule for dialysis without unnecessary interruption.

Endovascular / Catheter-Based

Medically Reviewed By:

Dr. Kristian A. Ulloa

2026-07-26

Dialysis Access Maintenance

Dialysis access maintenance keeps an AV fistula or graft working: balloon angioplasty opens narrowed segments, thrombectomy clears a clotted access — ideally within 24 to 48 hours — and surgical revision corrects problems a balloon cannot fix. Vascular Wellness Institute coordinates directly with nephrologists and dialysis centers in Sarasota and Bradenton so dialysis is not interrupted.

Dialysis Access Maintenance in Sarasota & Bradenton

Your Access Needs to Work Every Time. We Make Sure It Does.

An AV fistula or graft is your lifeline for hemodialysis — and keeping it functioning is an ongoing commitment that requires both vigilant monitoring and, when problems arise, prompt intervention. Over time, dialysis access can develop narrowing (stenosis), blood clots (thrombosis), or other complications that reduce flow and threaten access function.

At Vascular Wellness Institute, our surgeons provide comprehensive dialysis access maintenance — from surveillance imaging to urgent thrombectomy and revision procedures — to keep your access working reliably so your dialysis is never interrupted.

Common Access Problems

Stenosis — narrowing within the fistula, graft, or outflow vein that reduces blood flow
Thrombosis — clotting within the access that causes it to stop functioning
Aneurysm or pseudoaneurysm — localized bulging of the access from repeated needle punctures
Infection — more common with grafts than fistulas
Access steal syndrome — when the access diverts too much blood from the hand, causing pain or numbness

Maintenance Procedures

Angioplasty (Balloon Dilation)

When stenosis is identified on surveillance imaging or clinical assessment, balloon angioplasty is used to open the narrowed segment. A catheter with a balloon tip is advanced to the stenosis and inflated, restoring diameter and flow. This is performed through a small needle puncture in the access and does not require an incision.

Thrombectomy

When a clot causes the access to stop functioning, thrombectomy — clot removal — is performed urgently to restore access function. Surgical thrombectomy involves making a small incision and physically removing the clot. Pharmacomechanical thrombolysis uses catheters and clot-dissolving medication. Prompt treatment — ideally within hours of clot detection — significantly improves the likelihood of salvaging the access.

Surgical Revision

When angioplasty alone is not sufficient or when anatomical problems require correction, open surgical revision may be needed. This may involve patching or replacing a segment of the access, moving the access to a different location, or converting from a graft to a fistula.

Surveillance: The Key to Longevity

Regular monitoring of dialysis access is essential to extending its functional life. Physical examination of the access at every dialysis session is standard practice and the most consistent form of ongoing surveillance. Duplex ultrasound can identify stenosis that may not yet be apparent on clinical exam, but imaging is most useful when prompted by clinical indicators — changes in flow rates, pressures, or physical findings — rather than performed on a fixed schedule alone. KDOQI guidelines emphasize that a stenosis identified on imaging should be treated only when it is also clinically significant, not on the basis of imaging findings alone. Surveillance intervals are individualized based on access type, history, and dialysis-center monitoring protocols.

Anesthesia Type

Local, Conscious Sedation

Typical Duration

45–90 min

Performed At

Outpatient Surgery Center, Hospital

Recovery Time

Same day — dialysis resumes per the care team schedule

Frequently Asked Questions

How do I know if my access is failing? +

Warning signs include reduced blood flow rates during dialysis, difficulty placing needles, prolonged bleeding after needle removal, swelling of the arm, a change in the sound or feel of the access (it should have a strong, smooth thrill), and high venous pressures during dialysis sessions. Report any of these to your dialysis nurse and contact your vascular surgeon promptly.
How quickly can a clotted access be treated? +

Thrombosis of a dialysis access should be treated urgently — ideally within 24 to 48 hours. The longer a clot sits, the more difficult it is to remove and the less likely the access is to be salvaged. If your dialysis center identifies a clotted access, contact us immediately.
How many angioplasty procedures can a fistula or graft tolerate? +

There is no fixed limit to the number of angioplasty procedures an access can receive. Repeated dilation of a stenosis is common and can maintain access function for many years. However, rapidly recurrent stenosis despite multiple dilations may indicate that stenting or surgical revision would offer a more durable long-term result. Your vascular surgeon will help you evaluate when intervention is warranted versus when continued angioplasty remains the right approach.
What happens if my access cannot be saved? +

If an access is irreparably damaged or repeatedly fails despite intervention, a new access will need to be created. This is planned in advance whenever possible to avoid dependence on a temporary catheter. Your vascular surgeon will evaluate your remaining options based on your anatomy.
Does VWI coordinate with my dialysis center? +

Yes. We work closely with nephrologists and dialysis center staff to coordinate care, share surveillance data, and ensure rapid response when access problems arise. Our goal is to keep you on schedule for dialysis without unnecessary interruption.