A comparative study between continuous epidural analgesia, ultrasound guided continuous femoral nerve block (CFNB), and ultrasound guided continuous adductor canal block (ACB) for post-operative pain management after total knee replacement (TKR)

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Abstract

Background
Total knee replacement (TKR) is considered a prevailing cause of severe postoperative pain and discomfort among orthopedic surgeries, limiting postoperative ambulation that is important for regaining joint function. Despite being the gold standard, epidural analgesia can be accompanied by diverse complications delaying postoperative ambulation and discharge from hospital. Continuous femoral nerve block (CFNB) and continuous adductor canal block (ACB) are reliable and efficacious regional anaesthesia techniques allowing better control of postoperative pain. This study purposed to compare epidural analgesia, continuous femoral nerve block & continuous adductor canal block regarding postoperative analgesia & incidence of postoperative complications.
Results
Epidural analgesia was superior to CFNB and ACB regarding postoperative pain control using visual analogue scale and postoperative pain control. CFNB and ACB are superior to epidural analgesia regarding postoperative ambulation and postoperative complications.
Conclusions
Continuous epidural analgesia provides superior analgesia following total knee replacement than femoral nerve block and adductor canal block, with relatively more adverse effects like pruritus, post operative nausea, and vomiting (PONV). Both CFNB and ADB are good alternatives with fewer systemic side effects.
Trial registration
ClinicalTrials.gov Identifier: NCT 05249478.

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