Sciatic Nerve Block Using the Subgluteal Space Approach: A Comparison With the Infragluteal Approach

"Sciatic Nerve Block Infragluteal group: Ultrasound scanning will be used to identify and mark the greater trochanter laterally and the ischial tuberosity medially. The midpoint between these two structures is a rough non-binding estimate of the approximate location of the sciatic nerve. The sciatic nerve is usually found anterior (deep) to the gluteus maximus muscle and lateral to the origin of the biceps femoris muscle at the ischial tuberosity as well as medial to the greater trochanter.~The end point of nerve block in this group is obtaining a circumferential local anesthetic spread around the sciatic nerve."

Subgluteal space group: The operator will identify the gluteus maximus and biceps femoris muscles at the level of the greater trochanter and ischial tuberosity and the infragluteal space.