Management of Infected Arteriovenous Fistulas in Dialysis Patients

Introduction to Infected AVF Management

The American Journal of Kidney Diseases recommends that a patient with an infected arteriovenous fistula (AVF) can continue dialysis through the infected access while receiving IV antibiotics, but cannulation must avoid the infected site itself 1, 2, 3

Infected AVFs should be treated as subacute bacterial endocarditis with 6 weeks of IV antibiotic therapy, according to the American Journal of Kidney Diseases 1, 2, 3
Initial empiric antibiotic coverage must include both Gram-negative and Gram-positive organisms, including Enterococcus, until culture results guide definitive therapy 1, 2
The infected AVF can remain in use for dialysis during antibiotic treatment, unlike infected grafts which often require surgical intervention 1, 2

Cannulation must cease at the specific infected site—needles should be placed in unaffected portions of the fistula away from any area showing signs of infection 4
Avoid cannulating through or near sites with erythema, warmth, tenderness, drainage, or compromised skin integrity 4, 5

Fistula takedown (surgical removal) is mandatory only in cases of septic emboli, as recommended by the American Journal of Kidney Diseases 1, 2, 3
Immediate AVF closure is also required for monomelic ischemic neuropathy or severe symptomatic ischemia with tissue necrosis 4

The American Journal of Kidney Diseases states that AVF (native fistula) infections can typically be salvaged with antibiotics alone (6-week course) 1, 2, 3
AVG (synthetic graft) infections require antibiotics PLUS incision/resection of the infected graft portion, or total graft resection for extensive infection 1, 2, 3

If the infected AVF cannot be safely cannulated due to extensive involvement, establish temporary alternative access (tunneled catheter, not PICC line) rather than abandoning the fistula, as recommended by the American Journal of Kidney Diseases 6, 7
Avoid PICC lines in dialysis patients as they are associated with 2.8-fold increased odds of AVF failure (OR 2.8, 95% CI 1.5-5.5) 7

Assess the access at every dialysis session for changes in thrill, bruit, or new signs of infection spread, according to Praxis Medical Insights 4
Monitor for systemic signs: persistent fever, chills, or bacteremia beyond 36 hours warrant reassessment of the treatment plan, as recommended by the American Journal of Kidney Diseases 1, 2
Blood cultures should be repeated periodically during and immediately after antibiotic therapy, according to the American Journal of Kidney Diseases 2

Do not delay evaluation or treatment—even minor signs of AVF infection require immediate initiation of the 6-week antibiotic protocol, as recommended by the American Journal of Kidney Diseases and Praxis Medical Insights 1, 2, 4
Do not attempt to cannulate through infected tissue, as this exacerbates the infection and risks access failure, according to Praxis Medical Insights 4, 5
Do not confuse AVF management with AVG management—infected grafts almost always require surgical intervention, while infected fistulas can usually be salvaged medically, as stated by the American Journal of Kidney Diseases 1, 2

Avoid PICC lines in dialysis patients with an arteriovenous fistula (AVF) infection because their use is associated with a 2.8‑fold increased odds of AVF failure (OR 2.8, 95 % CI 1.5–5.5)【8】.
Central venous catheters (including tunneled catheters) increase chronic inflammation, bloodstream infection risk, mortality, and overall cost when compared with a functioning AVF【8】.

Duplex ultrasound may be used as an adjunct to physical examination to define the extent of cellulitis involvement, identify pseudoaneurysm or abscess formation, and assist in management planning【9】.

If temporary access is required, place a tunneled catheter in the contralateral internal jugular vein rather than the ipsilateral side to preserve venous anatomy for future dialysis access【10】.