Objective: To evaluate the efficacy of soft silicone drain in reducing shoulder tip pain after laparoscopic adrenalectomy.

Material and Method: A prospective randomized control trial was done on 38 patients undergoing laparoscopic adrenalectomy and randomized prospectively into two groups in King Chulalongkorn Memorial Hospital, Bangkok, Thailand. In our previous observational study, we collected data of pain scores from two patient groups after laparoscopic adrenalectomy. There were five cases with soft silicone drains and five cases without soft silicone drains. We found that those with drains had significantly decreased mean pain score. In this study, the patients were divided into two groups. Patients in group A (n = 19) underwent laparoscopic adrenalectomy with soft silicone drains and patients in group B (n = 19) underwent laparoscopic adrenalectomy without soft silicone drains. Shoulder-tip pain was recorded on a visual analogue scale (VAS) at 4, 8, 12, 24, and 48 hours after operation. The quantity of analgesics required by the patients were recorded on the first and second day postoperatively.

Results: Twelve patients in group A (63.2%) and 14 patients in group B (73.68%) complained of shoulder-tip pain. However, there was no significant difference in the frequency and intensity of shoulder-tip pain between groups A and B. The postoperative shoulder-tip pain scores were not significantly different between the groups. The quantity of analgesics required by the patients in the two groups were not significantly different. According to VAS, pain scores were found to be highest at the fourth and the eighth hours postoperatively. The trends were similar in both groups.

Conclusion: Although our previous observational studies found that drains help reducing shoulder tip pain, our present randomized control trial found that they could not significantly reduce shoulder tip pain. Further studies to reduce shoulder tip pain should be conducted.

Keywords: Shoulder tip pain, Soft silicone drain, Analgesic drug, Laparoscopy, Adrenalectomy