patients will receive rhomboid intercostal block under ultrasound guidance.

Patients will received the conventional intravenous analgesia

Following endotracheal intubation, patients allotted to the RIB group were positioned in the lateral decubitus position with the chest on the operating side lying superiorly. The ipsilateral arm was abducted from the chest to move the scapula laterally. The RIB was performed as described previously [8]. A high-frequency (6-12 MHz) linear ultrasound probe (LOGIQ e ultrasonic system, Deutschland GmbH & Co. KG, Solingen, Germany) was placed medial to the medial border of the scapula in the oblique sagittal plane. The landmarks, i.e., the trapezius muscle, rhomboid muscle, intercostal muscles, pleura, and lung, were identified in the ultrasound. Under aseptic conditions, an 80-mm 21-gauge needle was inserted at the level of T6-7 in the ultrasound view. A single dose of 30 ml 0.25% bupivacaine will be injected in the interfascial plane between the rhomboid major and intercostal muscles. The spread of the local anesthetic solution under the rhomboid muscle was visualized by ultrasonography.

Postoperative morphine consumption

The time from stopping anaesthetic agent until extubation

Pain evaluation using the visual analog scale score,, 0= pain , 10= sever pain