Analgesia and respiratory function after laparoscopic cholecystectomy in patients receiving ultrasound-guided bilateral oblique subcostal transversus abdominis plane block: a randomized double-blind study.

Background: Transversus abdominis plane (TAP) block has been shown to ameliorate postoperative pain after abdominal surgery. Postoperative pain-associated respiratory compromise has been the subject of several studies. Herein, we evaluate the effect of oblique subcostal TAP (OSTAP) block on postoperative pain and respiratory functions during the first 24 postoperative hours.