Ultrasound-guided radial nerve release at the arm under WALANT.

Radial nerve entrapment at the LIS is an aching pain in the distal, lateral upper arm and leads to weakness in wrist and thumb/index finger extension. Additionally, a positive scratch collapse test and localized pain on pressure at the entrapment site are observed. The described approach uses a minimally invasive percutaneous ultrasound-guided technique under local anesthesia.