Antiplatelets and native arteriovenous fistula dysfunction.

Background: We investigated the safety and efficacy of antiplatelet therapy in preventing native arteriovenous fistula (AVF) dysfunction. Patients and methods: A systematic review was conducted in accordance with the PRISMA 2020 guidelines. Randomized controlled trials (RCTs) evaluating the effects of antiplatelet therapy following native AVF creation were eligible for inclusion. The primary endpoint was AVF primary patency. Secondary endpoints included AVF maturation, abandonment, and overall bleeding. Results: Twelve RCTs, comprising 2,491 patients, were incorporated in the analysis. The included studies assessed aspirin, clopidogrel, ticlopidine, and dypiridamole across various dosing regimens. The postoperative administration of antiplatelets, regardless of the specific drug or dose, was associated with improved AVF primary patency compared to controls or placebo, odds ratio (OR) 2.28 (95% CI: 1.42-3.65). Subgroup analysis showed no significant differences for aspirin 100mg daily or clopidogrel 75mg daily compared to controls/placebo, with ORs of 1.08 (95% CI: 0.76-1.54) and 2.16 (95% CI: 0.95-4.91), respectively. In contrast, ticlopidine 250mg twice daily significantly improved patency, OR 3.48 (95% CI: 1.46-8.26). Additionally non-statistically significant differences were identified between the antiplatelet and control/placebo groups in terms of maturation, OR 1.58 (95% CI: 0.81-3.09), AVF abandonment, risk ratio (RR) 0.93 (95% CI: 0.58-1.50), or overall bleeding RR 1.18 (95% CI: 0.77-1.81). Finally, meta-regression analysis of the antiplatelet groups pooled estimates revealed a negative association between maturation and follow-up duration (β =-0.1235, p<.01), and treatment duration and abandonment outcomes (β =-0.065, p<.01). Conclusions: This review demonstrated the safety and efficacy of antiplatelet therapy in preserving AVF patency, with ticlopidine and clopidogrel emerging as the primary contributors to this outcome. These findings suggest the potentially beneficial role of adenosine diphosphate (ADP) receptor antagonists in maintaining AVF patency.