Tips for a Lateral Femoral Cutaneous Nerve Block

The lateral femoral cutaneous nerve (LFCN) block is indicated for analgesia for surgery on the anterolateral thigh (e.g., skin grafting), muscle biopsy, and meralgia paresthetica. The complex branching of the LFCN makes accurate landmark-based blocks difficult, but ultrasound guidance ensures precise needle placement, enhancing pain relief and outcomes.

Here are our 3 go-to tips for performing an LFCN block

1. Place the transducer in a transverse position just distal to the anterior superior iliac spine (ASIS) to identify the sartorius muscle.
2. Identify the LFCN as a hyperechoic structure moving superficially to the muscle toward a tiny space between the sartorius and tensor fascia latae muscles.
3. Insert the needle in-plane or out-of-plane deep to the fascia lata next to the nerve and inject 3-5 mL of local anesthetic. 

Watch the video below to get a better picture of the process and see how the NYSORA Nerve Blocks App brings these instructions to life: 

For more tips like these and the complete guide to the 60 most frequently used nerve blocks, download the Nerve Blocks App HERE. Don’t miss the chance to get the bestselling NYSORA Nerve Blocks App also in book format – the perfect study companion with the Nerve Blocks app!