Figure 2.

Peripheral nerve electrolocation technique for the femoral nerve location and block using the dorsal approach. The anatomic landmarks were the spinous processes of the sixth (L6) and seventh (L7) lumbar vertebrae. A dotted line was drawn connecting them. Then, a second dotted line was traced at mid-distance between these points and perpendicular to the spine to the limits of the lateral abdominal wall. The second line was divided into thirds. At the first third, another line was traced parallel to the spine line. The crossing point between the second and the third lines was considered the puncture site. IL = iliac crest