Dialysis Access Surgery

The aim is a durable, high-flow connection between the circulation and the dialysis machine that can be needled repeatedly for years. Good access planning also protects future options: veins are a finite resource, and each access is created with the next one in mind. The work is done for patients with advanced kidney disease who need, or are expected to need, haemodialysis.

• Patients approaching the need for haemodialysis, ideally referred early so a fistula can mature in time
• Patients already dialysing through a catheter who need permanent access
• Patients whose existing access is failing and needs revision

Vessel quality on ultrasound, previous lines and surgery, cardiac function and the dominant hand all shape the recommendation, made jointly with the treating nephrologist.

Preparation is coordinated with nephrology and includes examination of both arms, duplex vein mapping and review of pacemakers or previous central lines. Potential access veins should be protected in advance: where possible, avoid blood tests and cannulas in the planned arm. Routine medication, allergy and anticoagulant review completes the work-up.

Vein mapping

Ultrasound measures arteries and veins and checks their continuity. Previous catheters, pacemakers, surgery and dominant hand are considered.

Why create the fistula months before I need dialysis?

A fistula must enlarge and develop adequate flow before it can be needled, which takes weeks to months. Early creation avoids starting dialysis through a catheter.

Arteriovenous fistula

A fistula joins the patient's own artery and vein, usually in the arm. The increased flow enlarges and strengthens the vein for repeated needling. Fistulas generally give the best long-term performance when suitable vessels are available.

Arteriovenous graft

A graft uses a synthetic tube to connect artery and vein when the patient's veins are too small or unsuitable. Grafts can often be used sooner but have higher rates of infection and narrowing.

Dialysis catheter

A central venous catheter provides immediate access but carries greater risks of infection and central vein narrowing. It is generally a bridge while permanent access matures, or a fallback when other options are unavailable.

Fistula or graft creation is usually day surgery under local or regional anaesthesia, sometimes with sedation or general anaesthesia. The artery and vein are joined, or the graft tunnelled between them, and the access is checked for a thrill (a palpable buzz of flow) before closure. The exact configuration is finalised against the vein mapping and the findings at operation.

The incision heals over several weeks while the fistula matures, enlarging and building flow before it can be needled. Exercises may help maturation, and ultrasound assesses any access that is slow to develop. Patients are taught to feel for the thrill daily, keep blood pressure cuffs, blood tests and cannulas off the access arm, and report any change in the thrill, swelling or hand symptoms immediately.

• Failure of the fistula to mature
• Narrowing (stenosis) and thrombosis
• Bleeding and infection
• Aneurysmal enlargement over time
• Hand ischaemia (steal)
• Arm swelling
• High-output cardiac strain
• Need for revision surgery

Regular dialysis-unit monitoring and surveillance pick up most problems early, when they can be fixed with a straightforward procedure.

The choice between an arteriovenous fistula, synthetic graft and dialysis catheter depends on the urgency of dialysis, vessel quality, previous access procedures and the expected duration of kidney replacement therapy. Whenever possible, planning begins before dialysis is needed so there is time for a fistula to mature.

Not every anatomically possible fistula will become suitable for dialysis. Preoperative ultrasound maps the arteries and veins, while follow-up assesses maturation, flow and depth. Patients should understand where the access will be created, how long maturation may take and what options remain if it does not develop adequately.

Protecting the access is a shared long-term responsibility. Blood pressure cuffs, needles and blood tests should generally be avoided in the access arm unless the renal team advises otherwise. A change in the usual vibration, increasing swelling, prolonged bleeding, hand pain or signs of infection require prompt review because early treatment may preserve the access.

Yarra Vascular Surgeons provides fistula creation, graft procedures, revision and complex access surgery, working closely with nephrologists including Dr Tim Pianta and with dialysis teams to support access maturation, function and long-term preservation.

Reliable dialysis access depends on early planning around vessel quality, future options and the patient's broader health. Nephrologists and GPs can refer patients for access planning at any stage of kidney disease.