Complex regional pain syndrome and acute carpal tunnel syndrome following radial artery cannulation: a neurological perspective and review of the literature.

Complex regional pain syndrome (CRPS) associated with acute carpal tunnel syndrome (aCTS) developed in a 38-year-old right-handed man following radial artery cannulation (RAC) during the course of lumbar spine surgery. Inciting events and risk factors that might have led to these complications included: multiple arterial punctures and subsequent hematoma formation, radial artery spasm compounded by aggressive hemostasis, anatomical changes in the wrists related to repetitive manual activities in the workplace, and possible protracted hyperextension of the wrists during perioperative and operative procedure. Although CRPS is considered a rare complication of RAC, the condition is disabling and debilitating, especially when associated with aCTS.