Dialysis Access Assessment

AV Fistula Mapping and Surveillance

Ultrasound assessment of arm arteries and veins before selected dialysis-access procedures, or evaluation of an existing fistula or graft when requested.

Before booking an access examination

If the usual access thrill is absent, the access stops working during dialysis, or sudden swelling or pain develops, contact the dialysis unit or vascular-access team the same day using their instructed clinical channel; do not use general WhatsApp. For heavy bleeding that will not stop, fainting, breathing difficulty, or a suddenly cold, pale, or severely painful hand, call 112 or go to the nearest emergency department immediately.

The booking option below is only for stable planning or surveillance; this information is not a self-diagnosis.

Expected duration

30-45 minutes

Preparation

Keep the arm comfortably warm

Report

Timing confirmed

Referral

When clinically requested

Who May Be Referred for This Examination?

People approaching dialysis when access planning is requested
Patients being assessed before fistula or graft creation
Dialysis patients with concern about access function
Patients referred for access surveillance or follow-up

Common Reasons for Referral

Planning for creation of dialysis access
Pre-operative mapping of arm arteries and veins
Concern that a new fistula is not maturing as expected
Difficulty with cannulation or dialysis flow
New swelling or discomfort near the access
Concern about narrowing, thrombosis, or another access complication

What to Expect During the Examination

1

You sit or lie comfortably with the relevant arm accessible

2

Ultrasound gel is applied along the arm

3

Selected arteries and veins are examined and mapped

4

Vessel diameter, depth, and blood-flow measurements are recorded

5

An existing access is assessed according to the referral question

Frequently Asked Questions