What Is AV Fistula Creation and Salvage?
An arteriovenous fistula connects an artery to a vein so the vein can enlarge and provide reliable access for haemodialysis. Good planning begins before dialysis whenever possible. Existing access may need assessment when it matures slowly, delivers poor dialysis flow, causes prolonged bleeding, becomes swollen or loses its thrill. Salvage may involve angioplasty, thrombectomy, surgical revision or a new access plan.
Who May Be Considered?
- Advanced kidney disease with expected long-term haemodialysis
- A fistula that is not maturing for needle use
- Low dialysis flow, prolonged bleeding or arm swelling
- A weak or absent thrill suggesting narrowing or thrombosis
Assessment and Tests
- Examination of pulses, veins and existing access
- Arterial and venous vessel mapping
- Access Doppler and dialysis-flow review
- Fistulogram or central-vein imaging when indicated
How Treatment May Be Performed
Choose a site that preserves future access options
Create the artery-to-vein connection surgically or by an appropriate technique
Treat access narrowing with angioplasty when suitable
Remove clot or revise the access when timely salvage is possible
How to Prepare
Coordinate timing with the nephrologist and dialysis unit. Bring access-flow records and details of every catheter, fistula, graft and central-line procedure. Medicine and fasting instructions depend on whether the plan is mapping, surgery, fistulogram or thrombectomy.
Comfort and Anaesthesia Planning
Fistula creation may use local, regional or general anaesthesia depending on the site and patient. Endovascular access procedures commonly use local anaesthesia with sedation when required.
What to Expect During Recovery
Protect the operated arm and follow incision instructions. Maturation takes time and should be checked before routine needle use. After salvage, the dialysis team confirms when and how access can resume. New hand coldness, severe pain, bleeding or loss of thrill needs urgent review.
Risks and Limitations
Possible complications include bleeding, infection, thrombosis, failure to mature, aneurysmal enlargement, venous hypertension, excessive flow and steal causing reduced hand circulation. No access lasts forever, so surveillance and timely reporting are important.
Alternatives to Consider
An AV graft or dialysis catheter may be used when a suitable fistula cannot be created or dialysis must start urgently. Peritoneal dialysis may be relevant for some kidney patients. Access choice is coordinated with the kidney-care plan.
Follow-Up After Treatment
Daily thrill checks, dialysis-flow trends and examination can identify dysfunction early. Avoid blood-pressure cuffs, blood draws and tight bands over the access arm when possible. Planned intervention is generally preferable to waiting for complete access loss.
