Efficacy of Erector Spinae Plane Block in Caridac Surgery

Group ESP (Arm 1)The probe was placed craniocaudally in the parasagittal plane approximately 3 cm lateral to the T5 spinous process. The T5 transverse process is detected .When the block needle (Stimuplex B. Braun R, Melsungen, Germany) touched the transverse process, 0.5-1 mL of the 0.9% NaCl test dose was administered between the erector spinae muscle fascia and the vertebral transverse process, and the needle location was confirmed.Then, 20 ml of 0.25% bupivacaine was administered to this area, Group Control (Arm 2) :No intervention