Comparative effectiveness of neuraxial versus general anesthesia in total joint replacement surgery: an updated retrospective analysis using more recent data.

Introduction: Over a decade ago, our study group showed improved outcomes among total hip/knee arthroplasty (THA/TKA) patients given neuraxial versus general anesthesia. As the use of neuraxial anesthesia has increased and anesthesia practices evolve, updated analyses are critical to ensure if previously found differences still persist.

Methods: This retrospective cohort study included elective THA/TKAs from 2006 to 2021 as recorded in the all-payor Premier Healthcare Database. Multivariable regression models measured the association between anesthesia type (neuraxial, general, combined) and several adverse outcomes (pulmonary embolism, cerebrovascular events, pulmonary compromise, cardiac complications, acute myocardial infarction, pneumonia, all infections, acute renal failure, gastrointestinal complications, postoperative mechanical ventilation, intensive care unit admissions, and blood transfusions); models were run separately by period (2006-2015 and 2016-2021) and THA/TKA.

Results: We identified 587,919 and 499,484 THAs for 2006-2015 and 2016-2021, respectively; this was 1,186,483 and 803,324 for TKAs. Among THAs, neuraxial anesthesia use increased from 10.7% in 2006 to 25.7% in 2021; during both time periods, specifically neuraxial versus general anesthesia was associated with lower odds for most adverse outcomes, with sometimes stronger (protective) effect estimates observed for 2016-2021 versus 2006-2015 (eg, acute renal failure OR 0.72 CI 0.65 to 0.80 vs OR 0.56 CI 0.50 to 0.63 and blood transfusion OR 0.91 CI 0.89 to 0.94 vs OR 0.44 CI 0.41 to 0.47, respectively; all p<0.001). Similar patterns existed for TKAs.

Conclusion: These findings re-confirm our study group's decade-old study using more recent data and offer additional evidence toward the sustained benefit of neuraxial anesthesia in major orthopedic surgery.