"Quadriblock Versus IPACK + Femoral Triangle Block + Obturator Nerve Block in Total Knee Arthroplasty"

25 milliliters of ropivacaine 0.3% will be injected between popliteal artery and femur.

25 milliliters of ropivacaine 0.3% will be injected on the lateral side of the femoral artery at the distal part of the femoral triangle.

20 milliliters of ropivacaine 0.3% will be injected between the adductor magnus and adductor brevis muscles and between the adductor brevis muscle the pectineus.

20 milliliters of ropivacaine 0.3% will be injected in supine position under the fascia iliaca lateral to the femoral artery.

25 milliliters of ropivacaine 0.3% will be injected in prone position in the subgluteal space by lateral approach.

5 milliliters of ropivacaine 0.3% will be injected laterally to the sartorius muscle.