• Korgün Ökmen, Hande Gürbüz, and Hakan Özkan.
• Department of Anesthesiology and Reanimation , Bursa Yuksek Ihtisas Training and Research Hospital, University of Health Sciences , Bursa/TURKEY.
• Korean J Anesthesiol. 2021 Jul 20.

BackgroundInterfascial plane block applications can be used for postoperative pain after laparoscopic surgery. We aimed to investigate the effect of ultrasound-guided unilateral rhomboid intercostal and subserratus plane (RISS) block after laparoscopic cholecystectomy operations on the amount of analgesic use.Methods50 patients underwent laparoscopic cholecystectomy were included in the quasi-experimental study. Patients meeting the criteria were analyzed in two groups as experimental group (RISS block with 20 ml %0.25 bupivacaine+intravenous patient-controlled analgesia (IV-PCA) tramadol ; n = 25) and group Control (IV-PCA tramadol; n = 25).The primary outcome was the total amount of tramadol used over 24 hours.Secondary outcomes included the side effects, additional analgesic use and postoperative pain (during rest and activity) was at the 2nd, 6th, 12th, and 24th hours using the NRS scores .ResultsPostoperative tramadol consumption at the 24 hours was significantly lower in the Group RISS than the Group Control (p<0.001). The resting NRS scores at the 2nd and 6th hours were statistically significantly low in the Grup RISS. The NRS scores during movement in Grup RISS were significantly low at the postoperative 2nd, 6th, and 12th hours.There was no statistically significant difference in the rate of side effects and additional analgesic use between the groups (p>0.05).ConclusionsIn conclusion, unilateral RISS block is an effective method for pain management after laparoscopic cholecystectomy and can be used as a part of multimodal analgesia.

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