The Analgesic Efficacy of Ultrasound Guided Adductor Canal Block Versus 4 in 1 Block in Patients Undergoing Knee Surgeries: A Comparative Randomized Double Blinded Study .

patients will receive an injection of 30 ml of .25% of Bupivacaine including 4mg of dexamethasone at a point anterior to the femoral artery, deep to the sartorius muscle (adductor canal block).

patients will receive an injection of 30 ml of .25% of Bupivacaine including 4mg dexamethasone at the adductor hiatus where the descending genicular artery branches from superficial femoral artery (4 in one block).