American Society of Anesthesiologists physical status classification predicts perianesthetic morbidity and mortality of companion pigs.

ASA physical status III-IV predicts increased perianesthetic morbidity and mortality in companion pigs.

This single-center cohort study analyzed 447 anesthetic events in 304 companion pigs from 2019-2023 to evaluate perianesthetic morbidity and mortality predictors. Intraprocedural complications occurred in 54.7% of procedural sedation cases and 79.4% of general anesthesia cases, with hypoxemia being the most common complication (40.4%). Logistic regression analysis demonstrated that American Society of Anesthesiologists (ASA) physical status III-IV was significantly associated with increased intraprocedural complications (OR 3.236, 95% CI 1.52-6.81) compared to ASA I-II status. Perianesthetic mortality occurred in 1.6% of cases (7/447), with ASA status III-IV conferring substantially increased 48-hour mortality risk (OR 25.40, 95% CI 7.25-89.93). The findings underscore the clinical importance of comprehensive preanesthetic assessment in porcine patients and recommend routine pulse oximetry with oxygen supplementation during the perianesthetic period to mitigate hypoxemia-related complications.

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