Combination of Parasternal and Serratus Anterior Plane Block in Coronary Artery Bypass Graft Surgery

"The first PSB will be applied to the patients with 7.5 ml of 0.25% bupivacaine under real-time ultrasound guidance at the level of the second intercostal space.~The second PSB will be applied to the patients with 7.5 ml of 0.25% bupivacaine under real-time ultrasound guidance at the level of the fourth intercostal space.~The SAPB will be applied to the patients with 10 ml of 0.25% bupivacaine under real-time ultrasound guidance at the level of the sixth rib in the anterior axillary line.~The block applications will be applied bilaterally."