The Effect of Ultrasound-Guided Erector Spinae Block on Respiratory Function After Laparoscopic Cholecystectomy

A linear ultrasound transducer will be place in a longitudinal parasagittal orientation about 3 cm lateral to spinous process. 40 ml bupivacaine/lidocaine mixture will be injected into the fascial plane on the deep aspect of erector spinae muscle. Standard perioperative and postoperative analgesia protocol will be given and postoperative pain levels will be determined by Numerical rating scale (NRS).

Standard perioperative and postoperative analgesia protocol will be given consisting of paracetamol 1 gr IV and tenoxicam 20 mg IV initiated after induction of anesthesia. At the end of the operation patients will receive meperidine 0.5 mg/kg IV before extubation. Postoperative pain levels will be determined by Numeric Rating Scale (NRS) system, 20 minutes intervals in the first hour and at 2th, 6th, 12th and 24 th hour. For the first hour in the postoperative care unit, tramadol 50 mg IV will be given for rescue analgesia with minimum 20 minutes between doses, in patients showing a NRS ≥ 4. Paracetamol 1 g / 12 hour will be given during ward follow-up. In the ward in patients showing a NRS ≥ 4 tramadol 50 mg IV will be given for analgesia.