Peroneal Mononeuropathy Resulting From Soft Knee Immobilizer Use After Arterial Embolization

Soft knee-immobilizing devices are commonly used after radiologic procedures that require femoral access. They are used for patients who are deemed to be at a higher risk for complications (specifically, hematoma) because of an inability to keep their knee extended and their leg still after arteriography. We report a case of a 68-year-old female who presented with a pathologic subtrochanteric left hip fracture resulting from a highly vascularized lytic lesion necessitating transarterial embolization before surgical repair could be undertaken. Postprocedurally, the patient developed right peroneal neuropathy and right foot drop potentially as a result of a soft knee-immobilizing device placed on the right knee after the embolization procedure.