• Rui Min Lee, John Boon Lim Tey, and Nicholas Hai Liang Chua.
• Department of Anesthesiology, Intensive Care and Pain Medicine, Tan Tock Seng Hospital, Singapore.
• Anesth Pain Med. 2012 Jan 1;1(4):239-42.

BackgroundPain after total knee arthroplasty is severe and impacts functional recovery.ObjectivesWe performed a retrospective study, comparing conventional patient control analgesia (PCA) modalities versus continuous femoral nerve blockade (CFNB) for 1582 post-TKA (total knee arthroplasty) patients.Patients And MethodsUsing our electronic acute pain service (APS) database, we reviewed the data of 579 patients who had received CFNBs compared with 1003 patients with intravenous PCA over 4 years.ResultsOur results show that the incidence of a severe pain episode was higher in the PCA compared with the CFNB group. Lower pain scores were observed in the CFNB group compared with the PCA group from postoperative day (POD) 1 to 3, primarily due to lower rest pain scores in the CFNB group.ConclusionsOur study shows that there is improvement in pain scores, at rest and on movement, as well as a reduction in incidence of severe pain, in patients who receive CFNB versus those who receive intravenous PCA.

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