Indications: hip fracture, femur fracture, thigh abscess, etc.

The saphenous nerve is a distal branch of the femoral nerve (not labeled here) and travels on the medial aspect of the leg.

Common errors include placing the probe too low in the leg (after the common femoral artery has bifurcated) or not parallel to the inguinal ligament.

The key for this block is to get fluid underneath the fascia iliaca. I commonly hydrodissect with normal saline to open the space and then add the anesthetic.