General vs Spinal Anesthesia for Revision Total Knee Arthroplasty: Do Complication Rates Differ?

Area of Science:

• Orthopedic Surgery
• Anesthesiology
• Health Services Research

Background:

• The incidence of primary and revision total knee arthroplasty (TKA) is rising globally.
• Previous studies indicate spinal anesthesia may reduce risks in primary TKA compared to general anesthesia.
• The comparative safety of anesthesia types in revision TKA has not been extensively studied.

Purpose of the Study:

• To investigate the association between anesthesia type and postoperative outcomes in revision TKA.
• To compare complication rates, operative time, length of stay, and readmission between spinal and general anesthesia for revision TKA.

Main Methods:

• Retrospective cohort study utilizing the American College of Surgeons-National Surgical Quality Improvement database.
• Identified patients undergoing revision TKA, matched cohorts based on anesthesia type (spinal vs. general).
• Performed multivariate analysis to assess differences in outcomes, controlling for patient and operative factors.

Main Results:

• General anesthesia was linked to significantly higher rates of unplanned readmission, nonhome discharge, and transfusion.
• Increased risks of deep surgical site infection and extended length of stay were observed with general anesthesia.
• General anesthesia also correlated with longer operative times in revision TKA patients.

Conclusions:

• General anesthesia is associated with a greater risk of multiple postoperative complications following revision TKA.
• While causality is not definitively established due to the retrospective nature, findings suggest spinal anesthesia may be preferable for revision TKA.
• Further research is warranted to confirm these findings and guide anesthetic choices in revision TKA.