Patient–machine interactions of intravenous patient-controlled analgesia in bilateral versus unilateral total knee arthroplasty: A retrospective study

摘要

Background: Continuous passive motion after a major knee surgery optimizes functional prognosis, but causes severe pain. In this study, we assessed the effect of intravenous patient-controlled analgesia (IVPCA) on postoperative pain management in unilateral and bilateral total knee arthroplasty (TKA). Methods: Data were collected retrospectively from a single medical center from March 2003 to October 2007. All patients who had undergone TKA were given general anesthesia, and the type of surgery that each patient received was planned according to individual needs. A total of 223 patients qualified for this study, with 174 patients in the unilateral TKA group. Data on patient demography, pain scores, and side effect scores were collected. Total dose consumption, demand, delivery doses, demand-to-delivery ratio, and infusion rate were collected from PCA machines and analyzed. Results: The patient pain score and patient satisfaction showed no significant difference between the unilateral and bilateral TKA groups. The incidence of sedation (p?