Mid-Transverse Process to Pleural (MTP) Block and Erector Spinal Plan (ESP) Block in Spinal Surgery

In the MTP Group, a high frequency HFL-50 15-6 MHz linear ultrasound probe will be placed vertically approximately 3 cm laterally from the midpoint of the incision line in the midline. Using the parasagital scan, the block needle (50 mm 22 Gauge) will be advanced from the caudal to the cervical target of the paravertebral space. When the needle tip reaches the midpoint between the transverse process and the pleura, 1 ml saline is performed. Once the needle tip has been confirmed, 20 ml of 0.25% bupivacaine will be given to the block. The same procedure will be applied 3 cm later than the incision line.

In the ESP group, a high-frequency 15-6 megahertz linear ultrasound probe will be placed vertically approximately 3 cm laterally from the midpoint of the incision line in the midline. Once the erector spinae muscle and transver projections have been identified, the peripheral nerve blockage needle (50 mm 22 Gauge) will be advanced from caudal to cranial between the fascia of the erector spina muscle and the transverse process. After 1 ml saline injection, this plane will open. Twenty milliliters of 0.25% bupivacaine will be given for the block. The same procedure will be applied from the other 3 cm lateral of the incision line.

No regional plan block will be applied to the control group. Conventional analgesic methods were applied.