Effect of Platelet Function Testing Guidance on Clinical Outcomes for Patients with Intracranial Aneurysms Undergoing Endovascular Treatment.

Background: Platelet function testing has been proposed to better adjust individualized antiplatelet treatment for patients undergoing endovascular treatment for intracranial aneurysms. Its clinical significance needs to be comprehensively evaluated.

Purpose: Our aim was to evaluate the impact of platelet function testing-guided versus standard antiplatelet treatment in patients receiving endovascular treatment for intracranial aneurysms.

Data Sources: PubMed, EMBASE, and the Cochrane Library of clinical trials were searched from inception until March 2023.

Study Selection: Eleven studies comprising 6199 patients were included.

Data Analysis: ORs with 95% CIs were calculated using random effects models.

Data Synthesis: The platelet function testing-guided group was associated with a decreased rate of symptomatic thromboembolic events (OR = 0.57; 95% CI, 0.42-0.76; I = 26%). No significant difference was found in asymptomatic thromboembolic events (OR = 1.07; 95% CI, 0.39-2.94; I = 48%), hemorrhagic events (OR = 0.71; 95% CI, 0.42-1.19; I = 34%), intracranial hemorrhagic events (OR = 0.61; 95% CI, 0.03-10.79; I = 62%), morbidity (OR = 0.53; 95% CI, 0.05-5.72; I = 86%), and mortality (OR = 1.96; 95% CI, 0.64-5.97; I = 0%) between the 2 groups. Subgroup analysis suggested that platelet function testing-guided therapy may contribute to fewer symptomatic thromboembolic events in patients who received stent-assisted coiling (OR = 0.43; 95% CI, 0.18-1.02; I = 43%) or a combination of stent-assisted and flow-diverter stent placement (OR = 0.61; 95% CI, 0.36-1.02; I = 0%) or who changed from clopidogrel to other thienopyridines (OR = 0.64; 95% CI, 0.40-1.02; I = 18%), though the difference did not reach statistical significance.

Limitations: Heterogeneous endovascular treatment methods and adjusted antiplatelet regimens were limitations.

Conclusions: Platelet function testing-guided antiplatelet strategy significantly reduced the incidence of symptomatic thromboembolic events without any increase in the hemorrhagic events for patients undergoing endovascular treatment for intracranial aneurysms.