Dexmeditomedine as an Adjuvant to Levobupivacaine in Transversus Thoracis Plane Block on the Management of Post-sternotomy Pain in Open-heart Surgeries

with the patient lying in the supine position. After skin disinfection, a high frequency linear ultrasound probe will be applied parallel to and between the 4th and 5th ribs connecting at the sternum. Then, different drugs according to the different groups will be injected between the transversus thoracic muscle and the internal intercosatal muscle.

the dexmeditomedine group shall undergo bilateral transversus thoracis plane block with 15 ml of 25% levobupivacaine, and 0.05 ug/kg dexmeditomedine on each side of the sternum

A local anesthetic that will be instilled in the transversus thoracic plane in a dose of 15 ml of a 25% concentration on both sides of the sternum in both groups