A Randomised Controlled Study on Epidural Morphine and Bupivacaine for Post-Operative Analgesia After Transforaminal Lumbar Interbody Fusion

Abstract

Study design: Randomised control study. Objective: Different parenteral analgesics are used to alleviate post-operative pain after transforaminal lumbar interbody fusion (TLIF) but limited by their efficacy and side effects. We performed a RCT to evaluate the safety and efficacy of epidural Morphine-Bupivacaine on post-operative pain management after TLIF. Methods: Consecutive patients (n=100) of TLIF were divided randomly into study (SG) and control groups (CG). At the end of procedure, SG (n=50) received epidural instillation of morphine 5 mg and bupivacaine.25% - 2 mL, along with 6 mL of.25% bupivacaine infiltration in the deep fascia before wound closure. The functional outcomes were assessed at regular intervals (4, 8, 12, 24, 36, 48, 72, 96 hours) with VAS, nausea and vomiting scale, Ramsay sedation scale and breakthrough analgesia needed, time to ambulation and other complications. Results: The mean VAS score at 4 hours in SG was significantly less (1.16 ±.88) than the CG (3.32 ± 1.0) (P =.000). This significant difference was maintained at each time point during the first 48 hours (P