Preemptive Analgesia by Intraperitoneal Instillation of Ropivacaine in Laparoscopic Cholecystectomy.

BACKGROUND

Preemptive analgesia has the potential to be more effective than a similar analgesic treatment initiated after surgery as it reduces immediate postoperative pain as well as chronic pain.

AIM

To study the efficacy of preemptive analgesia with intraperitoneal instillation of ropivacaine in laparoscopic cholecystectomy (LC).

MATERIALS AND METHODS

This prospective randomized double-blind study was conducted on patients undergoing LC. Hundred patients were randomly divided into two groups of fifty each. In Group A, patients received 3 mg/kg of ropivacaine intraperitoneal instillation in 100 ml normal saline (NS) before creation of pneumoperitoneum and in Group B patients received 3 mg/kg of ropivacaine intraperitoneal instillation in 100 ml NS after completion of surgery. Postoperative visual analog scale score for abdominal and shoulder tip pain alongwith requirement of rescue analgesic were recorded for 24 h.

RESULTS

Significantly lower visual analog scores for pain were observed in Group A versus Group B. Group A reported significantly lower pain at 0 h ( < 0.001), 1 h ( = 0.003), 3 h ( = 0.006), 6 h ( = 0.003), and 12 h ( = 0.001) postoperatively, but the difference was not statistically significant after 12 h. The mean time of first rescue analgesic was 472.8 ± 26.32 min in Group A, as compared with 189 ± 11.87 min in Group B. A significantly lower analgesic requirement was observed in Group A versus Group B throughout the entire study period ( < 0.05).

CONCLUSION

The preemptive analgesia with intraperitoneal instillation of ropivacaine before creation of pneumoperitoneum is much more effective for postoperative pain relief in comparison to intraperitoneal instillation of ropivacaine after completion of surgery.