Dialysis Access Salvage in Singapore

Dialysis access salvage means trying to restore useful function to a fistula or graft that is failing. A narrowing, clot, infection or other problem can interrupt dialysis or make needling difficult. Treatment might involve balloon angioplasty, clot removal or surgery, but first the team must identify the cause and plan how dialysis will continue. Not every access can or should be salvaged.

Which access problems cannot wait?

Heavy, spurting or uncontrolled bleeding is an emergency. Call 995 in Singapore. Apply firm direct pressure to the bleeding point with clean gauze or cloth while following the dispatcher's instructions. Do not wait for a clinic booking or online reply.

Contact the dialysis unit or treating team urgently if the usual vibration, or thrill, disappears or changes markedly, the access becomes painful or swollen, dialysis flow falls, or a catheter moves, leaks or is damaged. Fever, chills, redness or discharge can indicate infection. Do not wait until the next dialysis session. If prompt contact is impossible, attend an emergency department.

A cold, painful, numb or weak hand needs urgent assessment. Call 995 for severe sudden symptoms, chest pain, marked breathlessness or collapse. An access problem and missed dialysis may create risks beyond the arm itself.

How is a failing access assessed?

The team reviews dialysis performance, needle difficulties, bleeding after sessions, changes in the thrill and previous interventions. Examination may be combined with duplex ultrasound or an angiographic examination of the access, sometimes called a fistulogram. The ultrasound video article explains the basic imaging principles.

The important question is whether a narrowing is causing a clinical problem. A scan finding alone does not mean every access needs a procedure. The dialysis access guide covers routine monitoring and daily care.

What treatment options might be considered?

How does access angioplasty work?

A catheter-guided balloon widens a significant narrowing to improve flow. Some lesions need specialised balloons. The site and behaviour of the narrowing, previous treatment and overall access plan determine the technique. A technically opened segment does not guarantee that the whole access will function well indefinitely.

What happens when the access has clotted?

Clot may be removed with catheter devices, surgery or a combination; clot-dissolving medicine is considered in selected situations. The team also looks for the narrowing or other cause that led to thrombosis. Removing clot without addressing the underlying problem may allow it to recur. Infection, clot age, anatomy and bleeding risk affect whether salvage is appropriate.

Are stents routinely needed?

No. A stent or covered stent may be useful for selected recurrent or resistant lesions and certain graft outflow problems. Placement can affect future needling or access options, so it must fit the longer-term plan. Ask why a stent is being recommended and whether angioplasty or surgery offers a better alternative in your case.

When might surgical revision help?

Surgery can revise a connection, bypass a diseased segment or address an access that has developed other structural problems. Some situations need a hybrid surgical and catheter approach. Infection, skin damage, severe hand ischaemia or excessive flow may require a different strategy, including closing an unsafe access rather than simply increasing its flow.

What if saving this access is not the best option?

The team balances the likely usefulness of another intervention against its risks and the burden of repeated procedures. Monitoring can be appropriate for a finding without clinical dysfunction. Other circumstances require a new fistula, graft or catheter plan. If the current access cannot be used, the nephrology and access teams must agree how essential dialysis will be provided.

What are the risks and preparation needs?

Risks include bleeding, vessel injury, clot migration, infection, loss of access and contrast-related problems. Clot-dissolving treatment adds bleeding considerations. Surgery has wound and anaesthetic risks. Urgent treatment or another procedure may be needed if complications occur.

Bring your medicines, allergies, recent dialysis details and previous procedure reports. Follow the team's specific medication and fasting instructions. Do not stop anticoagulants or antiplatelets, squeeze a suspected clot or manipulate a catheter on your own.

When can dialysis resume after treatment?

Timing and suitable needle sites depend on what was done and how the access is functioning. The team should communicate the plan to your dialysis unit. Continued monitoring is important because narrowing and clotting can recur. Learn which changes to report between appointments; apparent success on the procedure day does not replace follow-up.

How can I arrange a planned access review?

For a non-emergency review of recurrent access problems, contact Dr Andrew Choong's clinic at Mount Elizabeth Novena Specialist Centre, Singapore. The patient safety article offers questions about options and follow-up. An urgent access problem should go directly to the dialysis team or emergency care.