Postoperative Pain Between ACB and FNB After ACLR

adductor canal block: single injection, 0.5% levobupivacaine 15 ml with adrenaline 5 µg/ml, ultrasound guidance with nerve stimulator

femoral nerve block: single injection, 0.25% levobupivacaine 30 ml with adrenaline 5 µg/ml, ultrasound guidance with nerve stimulator

30 mL of normal saline injected into absorbing cloth through stump needle at the inguinal area but not penetrating skin, ultrasound guidance and nerve stimulator with percutaneous electronic guidance to create quadriceps contraction before injection

30 mL of normal saline injected into absorbing cloth through stump needle at the midfemoral area but not penetrating skin, ultrasound guidance and nerve stimulator with percutaneous electronic guidance without muscle contraction