Evaluation of Effectivity of Erector Spina Plane Block With Different Levels

ESP block is planned after the completion of surgery and before the extubation. Its application will be planned from the T7 level bilaterally when the patients are turned to the right lateral position. A linear ultrasound probe will be placed in the longitudinal parasagittal orientation 3 cm to lateral of T7 spinous process. After imaging of erector spina musceles and transvers process of 7 th trorocal vertebrae, an ultrasound-guided local anaesthetic mixture ( 0.5% bupivacaine 15 cc + 2% lidocaine 5 cc) will be applied to the region between spinae muscles and transverse process using a needle of 22 gauge \& 8cm directed from cranial to caudal. After application of the same procedure to the other side, the patients will be woken-up and patient-controlled analgesia consisting of intravenous morphine will be planned for all of them. Additionally, at postoperative 1.,4.,8.,12.,24. hours, NRS scales and morphine consumption will be recorded.

ESP block is planned after the completion of surgery and before the extubation. Its application will be planned from the T9 level bilaterally when the patients are turned to the right lateral position. A linear ultrasound probe will be placed in the longitudinal parasagittal orientation 3 cm to lateral of T9 spinous process. After imaging of erector spina musceles and transvers process of 9 th trorocal vertebrae, an ultrasound-guided local anaesthetic mixture ( 0.5% bupivacaine 15 cc + 2% lidocaine 5 cc) will be applied to the region between spinae muscles and transverse process using a needle of 22 gauge \& 8cm directed from cranial to caudal. After application of the same procedure to the other side, the patients will be woken-up and patient-controlled analgesia consisting of intravenous morphine will be planned for all of them. Additionally, at postoperative 1.,4.,8.,12.,24. hours, NRS scales and morphine consumption will be recorded.