Two Approaches of Transversus Abdominis Block (TAP ) in Laparoscopic Cholecystectomy

After induction of general anesthesia, oblique subcostal TAP blocks will be done(14) under the guidance of Sonosite ,superficial probe ,14-15 MHz ultrasound transducer

After induction of general anesthesia, bilateral lateral TAP block will be performed (15) under ultrasonographic guidance with transportable ultrasound device ( Sonosite ,superficial probe ,14-15 MHz)

the analgesia will be maintained using a morphine patient-controlled analgesia (PCA) device set to give 1.5 mg bolus administration of morphine without a basic rate and 15 min lock-out time. The total amount of morphine administration will be recorded for the subsequent 24 h