Group two (G2): distal FTB technique
The US probe was placed in a transverse orientation over the mid-thigh. The sartorius muscle was identified and followed to the point where its medial border intersected the adductor longus medial border. Once the proximal end of the AC was identified, the distance from this point to the inguinal ligament was divided in thirds. The femoral artery was followed to the point where the distal and medial third of the FT met. A lateral-to-medial in-plane approach was used to advance the needle and locate its tip in the lateral aspect of the femoral artery.