Comparison Between Fentanyl and Dexmedetomidine As Adjuvant to Bupivacaine in Combined IPACK and Adductor Canal Block for Postoperative Analgesia After Knee Surgeries

The patient receive unilateral ultrasound guided combined IPACK and ACB with bupivacaine only. two syringes , one for each block , each one contains (20 mL of 0.25% bupivacaine and 1 ml saline)

The patient receive unilateral ultrasound guided combined IPACK and ACB with bupivacaine only. two syringes , one for each block , each one contains (20 mL of 0.25% bupivacaine and 50 mcg fentanyl)

The patient receive unilateral ultrasound guided combined IPACK and ACB with bupivacaine only. two syringes , one for each block , each one contains (20 mL of 0.25% bupivacaine and 1 ug/kg dexmedetomidine not exceeding 100 ug (to be completed to 1mL with normal saline if needed). )