RADIOLOGY: VASCULAR: Case# 33519: ULTRASOUND SPINE AV FISTULA. The patient is a 71 year old female with progressive paraplegia. Intraoperative assistance provided at multiple stages during complicated spinal surgery with localization of AVM, localization of feeding vessel, confirmation of dramatic decrease in blood flow after ligation of feeding vessel, and localization and confirmation of incision of intramedullary lesion thought most likely to represent organized hematoma.