Magnesium Sulphate in Oblique Subcostal TAP Block

"Unlike specific peripheral nerve blocks, TAP block is a non-dermatomal field block. Even with the same US-guided technique, the extent of spread of local anesthetics can be variable due to individual anatomical variations (18). In order to perform the blocks, abdominal skin will be prepared and covered with sterile drapes. The needle can be introduced by multiple punctures along the oblique subcostal line from the xiphoid process towards the anterior part of the iliac crest .Thus, LA will be injected in the TAP along this line provides both upper and lower abdominal wall analgesia. The OSCTAP block more consistently covers L1 dermatome. After negative aspiration, a test injection with 1 ml of 0.9% normal saline will be performed to confirm the needle location. If the intended sensation will not decreased in surgical dermatomes after 30 min, the patient will be regarded to have a failed block and will be excluded from the study."

Bupivacaine plus normal saline containing MgSO4