2.5. USG guided Blocks:
All blocks were made by the same practitioner (SGK). The patients were
placed in the supine position, the knees were slightly flexed on the
side of surgery. A high frequency linear ultrasound transducer was
placed on the medial surface in the midline of the thigh in the
transverse plane. By moving the transducer in the transverse plane, the
femoral artery was detected in the adductor canal. The saphenous nerve
located just lateral to the femoral artery was determined, a 22-gauge
stimuplex needle was advanced from the lateral to medial direction using
the in-plane technique, and 15 ml of bupivacaine (0.16% or 0.25%) was
applied to encircle the saphenous nerve.