patient will be placed in a sitting position under complete aseptic condition and a cover sheath will be used for the ultrasound probe with an appropriate amount of lubricating gel applied on the probe, a high-frequency linear ultrasound transducer will be placed in a longitudinal orientation 3 cm lateral to the L3 spinous process. This should reveal three muscles superficial to the hyperechoic transverse process shadow as follows: trapezius, rhomboid major, and erector spinae.

Patient in group T will intravenously administrate dose of 1 mg/kg/8hr tramal ( opioid) to be increased upon patient needs up to 2mg/kg/6hr as rescue analgesic.

The patient will be placed in a sitting position under complete aseptic condition and a cover sheath will be used for the ultrasound probe with an appropriate amount of lubricating gel applied on the probe, a high-frequency linear ultrasound transducer will be placed in a longitudinal orientation 3 cm lateral to the L3 spinous process. This should reveal three muscles superficial to the hyperechoic transverse process shadow as follows: trapezius, rhomboid major, and erector spinae. then injecte bupivacaine hydrochloride

total amount of opioid consumption in the frist 48hours postoperative