The effect of pre-incisional infiltration of local anaesthetic on post- operative pain relief in patients undergoing lower abdominal surgeries under spinal anaesthesia: a comparative study
Keywords:
Bupivacaine, Local anaesthetic, Pre-emptive analgesia, Preincisional infiltrationAbstract
Introduction: Pain is the most undesirable experience for surgical patients. This study aims to determine the efficacy of preemptive bupivacaine infiltration on postoperative pain relief.
Material and Methods: This prospective randomised double blind study was carried out in fifty patients of either sex, age ranging from twenty to fifty years, undergoing lower abdominal surgeries under spinal anaesthesia. Patients were randomly assigned to receive either 30 ml of normal saline or 30 ml of 0.25% bupivacaine with adrenaline 5 ug/ml, 10 minutes before incision infiltrated along the line of proposed skin incision. We compared the postoperative analgesia as described by visual analog scale, and compared the duration of pain relief and also assessed the requirement of rescue analgesics in the first 24 hours.
Result: Study groups were comparable for age, weight, sex, operative time, and length of incision. We observed that severity of pain was much less in the intervention group than in the control group as per VAS compared at different time intervals (p<0.001). The mean duration of analgesia was 8.56 ± 0.3 hours in the intervention group and was almost four times (2.36 ± 0.2) that of the control group (p<0.001). The participants in the control group required almost double the amount of rescue analgesic than that in the intervention group (p<0.001).
Conclusion: Preincisional infiltration of bupivacaine is an easy and effective method of preemptive analgesia. It can lead to a smooth transition into the postoperative period.
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