0.125% Bupivacaine HCL @ 4-5 ml/h

0.125% Bupivacaine HCL , Morphine sulphate 3 mg @ 3-5 ml/h

0.125% Bupivacaine, Fentanyl 100 mic @ 3-5 ml/h

• Pain will be assessed using the VAS ranging from "0" (no pain) to "10" (worst imaginable pain). Pain will be evaluated at rest, while coughing, and during mobilization. Maneuvers of particular clinical importance for postoperative mobilization (alone and with help) will be chosen: Turning in bed, standing in front of the bed and walking, and using the toilet without help. The time needed until the patient can first successfully perform these maneuvers will be documented.

verbal rating score will be used (4 = very satisfied, 3 = satisfied, 2 = neutral, 1 = dissatisfied, and 0 = very dissatisfied).

3 serum samples for beta-endorphin will be taken 1st one preoperative base line , 2nd at VAS more than 3 at rest ,3rd when VAS less than 2 at rest