An arteriovenous (AV) fistula is a surgical connection between an artery and a vein, usually at the wrist or the elbow, that turns an ordinary vein into one strong enough to be needled three times a week for haemodialysis. It is not a minor procedure with a one-off result: for someone on dialysis it is a lifeline that has to keep working for years, and most of what determines that happens before the operation and in daily care afterwards. Created and managed by Prof. Dr. Yusuf Kalko in Istanbul, Turkey.

In short: a fistula made from your own vessels lasts longer and gets infected far less often than a graft or a catheter. It needs around six weeks or more to mature before it can be used, and the single most useful thing that can be done beforehand needs no equipment at all: protect the forearm veins — no drips, no blood samples and no blood-pressure cuffs on the arm that may carry the fistula.

Why a fistula rather than a graft or a catheter

Access type	Made from	Typical trade-off
AV fistula	Your own artery and vein	Longest working life and the lowest infection risk, but needs weeks to mature and does not succeed in everyone
AV graft	A synthetic tube joining artery to vein	Usable sooner and an option when the veins are unsuitable, but narrows and clots more often
Central venous catheter	A tube in a large chest vein	Usable immediately, which is why it is often the starting point — but carries the highest infection risk and can damage the central veins, limiting future options

The order of preference is not a matter of taste; it follows from how long each one tends to keep working and how often it causes problems.

Before the operation: protect the veins

This is the part patients are almost never told, and it is the one where they have the most influence. The veins of the forearm are the raw material for a future fistula. Every drip, every blood sample and every cannula placed in them leaves scarring that can make them unusable later.

Tell every nurse and doctor that your forearm veins are being preserved for dialysis access — before they take blood, not after,
Ask for the back of the hand for routine blood samples and cannulas where possible,
No blood-pressure cuff on the arm being preserved,
Raise it early — vein protection matters from the point kidney failure is progressing, not from the week dialysis starts.

Before surgery the arm is mapped with colour Doppler ultrasound to measure vein diameter and quality and check the arterial inflow, so the site is chosen on evidence rather than on appearance.

How it is created

Mapping and planning — which vein, which artery, which arm. The non-dominant arm is preferred where suitable.
Site selection, starting as far down the arm as possible — usually the wrist first. This is deliberate: a fistula made at the wrist leaves the elbow available for a future one, whereas starting at the elbow closes off the options below it.
Anaesthesia — local or regional in most cases; general anaesthesia is rarely needed.
The connection — the vein is joined to the artery through a small incision, so arterial pressure begins to flow through it.
Checking the result — a thrill (a continuous buzzing felt under the fingers) and a bruit (a continuous sound) confirm flow before the incision is closed.
Home the same day in most cases.

Maturation: why the wait

The fistula cannot be used immediately. Under arterial pressure the vein wall thickens and the vein widens — a process that typically takes around six weeks or more. Needling it too early risks damage that can end its working life before it has started. Hand exercises such as squeezing a soft ball are often advised to encourage the process.

If it is not developing as expected, that is checked rather than waited out: a Doppler study looks for a narrowing at the junction or along the vein, or for a side branch diverting flow. Many non-maturing fistulas can be corrected — by catheter in some cases, surgically in others — and salvaging one is usually better than abandoning it and starting again higher up the arm.

Daily care once it is working

Feel the thrill every day, ideally at the same time — morning and evening. Its disappearance is the one sign that must never be left until the next session,
Nothing constricting on that arm: no blood-pressure cuff, no blood samples, no drips, no tight sleeves, no watch or bracelet,
Do not sleep on it or rest your head on it,
Keep the skin clean and wash the area before dialysis; infection usually enters through the needling sites,
Rotate the needling sites — repeatedly puncturing the same two points weakens the wall and leads to bulging over time,
Report prolonged bleeding after the needles come out, or increasing difficulty needling — both often mean a narrowing is developing,
Normal activity is fine, including ordinary lifting; the restriction is on constriction and trauma, not on using the arm.

Contact your unit or seek urgent assessment if: the thrill or buzzing stops or becomes much weaker; bleeding from a needle site does not stop with pressure; the arm, hand or face becomes swollen; there is redness, heat, discharge or fever around the access; the hand becomes cold, pale, painful, numb or weak. A fistula that has clotted can sometimes be rescued within hours — the same event discovered days later usually cannot.

Problems and what is done about them

Problem	What you may notice	Usual approach
Narrowing (stenosis)	Harder needling, prolonged bleeding afterwards, falling dialysis flow, a changed sound	Doppler assessment, then balloon dilatation in many cases
Clotting (thrombosis)	The thrill disappears	Urgent — the chance of salvage falls with every hour
Steal syndrome	Cold, pale, painful or weak hand, worse during dialysis	Assessment of how much flow is diverted; procedures exist to correct it
Aneurysmal dilatation	Marked bulging at repeatedly needled points, thinning skin	Site rotation; surgical repair when the skin is at risk
Infection	Redness, heat, discharge, fever	Prompt treatment; more common with grafts and catheters than with fistulas
Arm or facial swelling	Persistent swelling on that side	Suggests a central vein narrowing, often from previous catheters — needs imaging

Most of these are treatable when caught early, which is what daily checking and routine surveillance are for.

Why Choose Turkey (Istanbul)?

Experienced vascular surgery with open, catheter-based and hybrid techniques in one centre,
Non-invasive assessment first — pulse examination, ankle–brachial index and Doppler before any decision,
English-language correspondence for international patients,
Pre-travel remote review of your reports, then an examination on arrival in Istanbul.

How to Start From Abroad (Remote Consultation)

Send your medical reports and imaging for an initial review before travelling. If the question is about an existing access, include your unit’s flow records and any previous imaging. The practical sequence — what to send, what can and cannot be decided remotely, and what determines the length of stay — is set out on the contact page.

Frequently Asked Questions

How long before my fistula can be used?

Usually around six weeks or more, and sometimes longer. The vein has to thicken and widen under arterial pressure before it can withstand repeated needling. Using it too early risks damaging it permanently, which is why the wait is not simply caution.

What should I do if I cannot feel the buzzing?

Treat it as urgent and contact your dialysis unit straight away rather than waiting for your next session. A clotted fistula can sometimes be rescued within hours, while the same problem found days later usually cannot be. This is the reason for checking it every day.

Why the wrist first rather than the elbow?

Because a fistula at the wrist preserves the elbow as a future option, while one at the elbow removes everything below it from consideration. Access is planned over years, not for a single operation, so the usual approach is to start as far down the arm as the vessels allow.

Can I lift things or exercise with that arm?

Normal use is encouraged, and hand exercises are often advised during maturation. What is avoided is constriction and trauma: blood-pressure cuffs, tight sleeves, watches, sleeping on the arm and repeated knocks. Ordinary daily activity is not the problem.

My hand feels cold and painful during dialysis. Is that normal?

It is not something to accept. It can mean too much blood is being diverted through the fistula away from the hand. This is assessable and treatable, and it should be reported rather than tolerated, particularly if the hand is becoming weak or numb.

Why do they say I should not have blood taken from that arm?

Because every puncture and cannula scars the vein, and scarred veins make poorer fistulas — and if the fistula is already working, the same applies to protecting it. It is worth telling staff before they take blood rather than afterwards.

I live abroad and already have a fistula with problems. What should I send?

Your dialysis unit’s records of flow rates and needling difficulty, any previous Doppler or fistulography reports with the images, details of previous access procedures and catheters, and when the problem started. The contact page explains the rest.

References

This content is for information purposes only and does not replace a medical consultation. Diagnosis and treatment require an in-person examination.