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Arteriovenous Fistula (Dialysis Access)
A surgically created connection between an artery and a vein, usually in the arm, to provide reliable access for kidney dialysis. It is the preferred long-term access.
Causes & risk factors
- Need for long-term haemodialysis in kidney failure
- Diabetes-related kidney disease
- High blood pressure-related kidney disease
- Other chronic kidney conditions
Common symptoms
- A buzzing/thrill felt over the fistula (normal)
- Arm swelling if it narrows
- Weak or absent thrill (possible blockage)
- Redness at the site (possible infection)
Tests & diagnosis
- Physical examination (feel for thrill)
- Duplex ultrasound of the fistula
- Kidney function
- Blood count
Treatment & management
- Surgical creation and a maturing period before use
- Care to protect the access arm (no BP cuffs or blood draws on it)
- Angioplasty to open a narrowed fistula
- Repeat surgery if it fails
- Prompt treatment of any infection
When to see a doctor urgently
- Seek urgent care if the thrill/buzz stops (possible blockage)
- See a doctor for redness, pain or swelling at the site
- Get urgent care for heavy bleeding from the fistula (apply pressure)
Not a diagnosis. MedDroid gives general educational information about arteriovenous fistula (dialysis access). It cannot examine you, diagnose or prescribe — always confirm with a qualified doctor.
Frequently asked questions
Why is a fistula preferred over a catheter?
Fistulas last longer and have fewer infections and complications than dialysis catheters.
How long before a new fistula can be used?
It usually needs several weeks to mature before it is strong enough for dialysis.
Explore more
Sources & further reading
- World Health Organization (WHO)
- MedlinePlus — U.S. National Library of Medicine
- Ministry of Health & Family Welfare, India
- Indian Council of Medical Research (ICMR)
Reviewed by Dr. Sanjay Anbu, MBBS. MedDroid is an AI medical assistant and can make mistakes. It provides general health information, not a diagnosis or medical advice — always consult a qualified clinician. In an emergency, contact your local emergency number immediately.