Subcostal Transversus Abdominis Block Versus Erector Spinae Block in Open Cholecystectomy

"Subcostal Transversus Abdominis Plain block will be performed under ultrasound guidance using a 5-10 MHz linear transducer. The needle will be inserted perpendicular to the skin 2 fingers below the costal~margin, just lateral to the rectus abdominis muscle. After confirming the needle tip's location within the TAP, 20 mL of 0.25% bupivacaine will be injected on both sides in patients undergoing open cholicystectomy surgery."

Ultrasound-guided Erector Spinae block using 20 mL of 0.25% bupivacaine will be injected bilaterally at the T7- T8 vertebral level in patients undergoing open cholecystectomy The probe will be advanced 3 cm to the right lateral direction and rotated 90 degrees, and the transverse processes will be determined . Next, 5 mL of 2% lidocaine will be administered to the predicted needle entry point. A 22-gauge, peripheral nerve block needle will cephalocaudally advanced by the in-plane technique. The needle tip will be continuously advanced toward the transverse process to 1-2 mm before contact with the transverse process. After negative aspiration, 20 ml of 0.25% bupivacaine will be injected with intermittent negative aspirations into the fascia of the erector spinae muscle.

Each patients group will recieve a type of block by injecting 20 ml of 0.25% bupivacaine on each side in patients undergoing open cholecystectomy