Anesthetic Strategy, Functional Outcomes, and Infectious Complications After Mechanical Thrombectomy for Acute Ischemic Stroke

Background/Objectives: The optimal anesthetic strategy during mechanical thrombectomy (MT) for acute ischemic stroke (AIS) remains debated. Although randomized trials suggest broadly comparable outcomes between general anesthesia (GA) and conscious sedation (CS), real-world data may be influenced by baseline severity, airway management, and postprocedural complications. We evaluated associations between anesthetic strategy, functional outcomes, mortality, and infectious and hemorrhagic complications after MT. Methods: This retrospective observational study included 257 consecutive adults with AIS treated with MT at a single comprehensive stroke center. Patients were managed under CS or GA according to clinical and procedural considerations. Outcomes, mortality, infectious and hemorrhagic complications were compared between groups. Multivariable logistic regression assessed associations with 90-day functional independence and mortality, adjusting for baseline and procedural factors. In an exploratory GA subgroup analysis, outcomes were compared according to extubation timing, defined as early (≤6 h) or delayed (>6 h). Results: Of 257 patients, 155 (60.3%) underwent MT under CS and 102 (39.7%) under GA. GA-treated patients had higher baseline NIHSS scores and worse unadjusted functional outcomes throughout follow-up. After adjustment, GA remained associated with higher 90-day mortality (OR 4.39, 95% CI 1.50–12.84; p = 0.007) and lower odds of 90-day functional independence (OR 0.29, 95% CI 0.10–0.82; p = 0.020). Pneumonia was more frequent with GA (49.0% vs. 26.5%; p < 0.001), although attenuated in adjusted analyses. Delayed extubation was associated with worse outcomes, higher pneumonia rates, and more frequent symptomatic intracranial hemorrhage. Conclusions: GA was associated with worse functional outcomes and higher mortality after MT, but residual confounding and differences in baseline stroke severity likely contributed to these associations. Pneumonia and hemorrhagic complications may identify patients at increased risk of poor outcome, especially when extubation is delayed. Findings require prospective confirmation.