Bupivacaine Liposome Plus Bupivacaine or Ropivacaine for Pericapsular Nerve Group Block in Hip Arthroplasty (PENG)

Liposomal bupivacaine is a prolonged-release formulation of the local anesthetic bupivacaine. This intervention involves the administration of liposomal bupivacaine plus bupivacaine as a local anesthetic for the pericapsular nerve group (PENG) block under ultrasound guidance. Liposomal bupivacaine is being investigated for its analgesic effect in postoperative pain management following hip replacement surgery. This formulation is designed to provide extended pain relief as compared to conventional bupivacaine formulations.

Ropivacaine is a commonly used local anesthetic in clinical practice, and it serves as the active comparator intervention in this study. Participants in the comparator arm will receive ropivacaine as a local anesthetic for the PENG block under ultrasound guidance.