Dialysis Access Creation in Singapore

Creating dialysis access gives haemodialysis a route to take blood to the machine and return it safely to the body. The main options are an arteriovenous fistula, an arteriovenous graft and a catheter in a large vein. Choosing access is a shared decision with you and your kidney-care team, based on your vessels, health, likely treatment course and when dialysis is needed.

Why is an individual access plan important?

A good plan looks beyond the next operation. It considers the likelihood that an access will become usable, how it will fit daily life and which options should be preserved for the future. Previous access procedures, catheters, pacemakers, hand symptoms and heart problems may affect the choice. The dialysis access condition guide explains the overall pathway.

The nephrology team also reviews the wider kidney-treatment plan. Peritoneal dialysis, transplantation or conservative kidney care have different requirements. An AV access operation is not automatically needed simply because kidney function is reduced. Timing should anticipate need without assuming every person will follow the same course.

What does vessel mapping show?

Examination and, when appropriate, ultrasound vessel mapping assess arteries and veins for access planning. Vein size and depth, arterial flow, previous damage and possible outflow problems all matter. Additional imaging may be considered if major-vein obstruction is suspected. Mapping supports a decision; it cannot guarantee that an access will mature or remain open.

Tell the team about previous arm, chest and neck procedures and bring existing scan reports. Ask which arm should be protected from unnecessary blood tests, intravenous lines and tight pressure. The duplex ultrasound video article introduces the principles of the scan.

How do the access types differ?

What is an AV fistula?

An operation joins an artery to a vein, usually in the arm. The extra flow encourages the vein to enlarge so it can be needled for dialysis. A suitable functioning fistula can provide durable access with relatively low infection risk. However, some fistulas develop slowly, need an additional procedure or never become usable. The team assesses readiness rather than relying only on the operation date.

When might an AV graft be chosen?

A graft uses a manufactured tube to connect an artery and vein. It may be appropriate if native veins are unsuitable or other factors favour it. Some grafts can be used sooner than fistulas, but timing depends on the device and healing. Grafts can develop infection, narrowing and clotting, so they also need careful use and follow-up.

What is a tunnelled dialysis catheter?

A catheter reaches a large vein and provides dialysis connections outside the body. A tunnelled catheter passes under the skin before entering the vein. It may bridge a period before an AV access is ready or provide longer-term access when other choices are unsuitable. Infection, poor flow and narrowing of major veins remain concerns. “Tunnelled” does not mean complication-free or permanently suitable.

What should I discuss before a procedure?

Ask about the proposed access site, anaesthesia, medicines, wound care and how dialysis will continue while the access heals. Follow individual instructions about fasting and medication; do not stop prescribed blood thinners yourself. The safer vascular care article can help you prepare questions.

Possible complications include bleeding, infection, clotting, arm swelling and inadequate access flow. AV access can sometimes reduce circulation to the hand or place an extra strain on the heart. Catheter placement can also cause injury to a nearby vessel, disturbance of heart rhythm or, with neck or chest access, a collapsed lung. Air entering the circulation is another serious possible catheter complication. Further treatment or a different access may be needed; no option is the best choice for every patient.

How is the new access checked?

The team monitors the wound, circulation and access function, then gives instructions about activity and needling. Learn the usual vibration, or thrill, in your fistula or graft. Keep catheter dressings protected and do not open, flush or manipulate the catheter yourself. Report changes promptly. If development or function is poor, access assessment and salvage options may be discussed.

Which changes need urgent help?

For heavy, spurting or uncontrolled access bleeding, call 995 in Singapore and apply firm direct pressure to the bleeding point with clean gauze or cloth while following the dispatcher's instructions. A disappearing thrill, fever, discharge, increasing swelling or a damaged catheter needs urgent contact with the dialysis team. Do not wait for the next dialysis session. If the team cannot be reached promptly, attend an emergency department. A suddenly cold, painful, numb or weak hand also needs urgent assessment.

How do I arrange a planned access discussion?

Contact Dr Andrew Choong's clinic at Mount Elizabeth Novena Specialist Centre, Singapore, for a non-emergency review. Bring your nephrologist's information, treatment timetable, medicines and previous access records so that surgical planning can be coordinated with kidney care.