The Effect of Local Anesthetic Infiltration or Erector Spina Plan Block on Stress Hormone Response

: at the end of the operation; 0.5% bupivacaine (1mg/kg) was infiltrated into the fascia muscles and preperitoneal space in equal doses to the wound at the 4 trocar entry site.

Erector spina block was applied to the group, after the end of the operation, the patients were placed in the left lateral decubitus position and the spinous process of the 8th thoracic vertebra was marked under sterile conditions. After visualizing the spinous process with ultrasound (EsoateMyLab™30 Gold, 8-18 MHz, Genova, Italy), the linear probe (8-12 MHz) was shifted 3 cm laterally from the midline in the cranial-caudal direction. Trapezius, erector spinae muscles, transverse process and pleura were visualized, and 20ml of 0.25% bupivacaine was injected into the validated interval by directing the peripheral nerve block needle in the cranio-caudal direction.