Infrapopliteal Bypass In Patients On Dialysis: Patency And Survival
DOI:
https://doi.org/10.48729/pjctvs.421Keywords:
Chronic Limb Threatening Ischemia, End-Stage Renal Disease, DialysisAbstract
Introduction
Portugal has one of the highest prevalence of patients on a regular dialysis program.
This population has a higher incidence of peripheral arterial disease with higher rates of postoperative morbidity and mortality.
Our goal was to compare outcomes between dialysis and non-dialysis patients with chronic limb threatening ischemia (CLTI) submitted to infrapopliteal bypass.
Materials and Methods
A retrospective single-center study of infrapopliteal bypass for CLTI was performed between 2012 and 2019. Patients were divided in two groups based on dialysis status (group 1 incorporated patients on dialysis). Primary end point was 1-year freedom from CLTI. Secondary end points were limb-salvage, survival and primary (PP) and tertiary patency (TP) rates at 3 years of follow-up.
Results
A total of 352 infrapopliteal bypasses were performed in 310 patients with CLTI. Fourteen percent of the revascularizations were performed on dialysis patients (48/352). Median age was 73 years (interquartile range - IQR 15) and 74% (259/352) were male. Median follow-up was 26 months (IQR 42). Overall, 92% (325/352) had tissue loss and 44% (154/352) had some degree of infection.
The majority of revascularization procedures were performed with vein grafts (61%, 214/352).
The 30-day mortality was 4% (11/310), with no difference between groups (p = 0.627). Kaplan-Meier analysis showed no difference between groups regarding freedom from CLTI (76% vs. 79%; HR 0.96, CI 0.65–1.44, p=0.857), limb-salvage (70% vs. 82%; HR 1.40, CI 0.71–2.78, p=0.327) and survival (62% vs. 64%; HR 1.08, CI 0.60–1.94, p=0.799). PP rates were 39% in group 1 and 64% in group 2 (HR 1.71, CI 1.05–2.79, p=0.030). TP rates were not different between groups (57% and 78%; HR 1.79, CI 0.92–3.47, p=0.082).
Conclusion
Infrapopliteal bypass for CLTI, on dialysis patients, resulted in lower PP rates. No differences were observed in freedom from CLTI, TP, limb salvage and survival.
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