Ulnar Artery
- Ulnar pulse assessment usually done just proximal and slightly radial to the pisiform
- The Allen test can be used to assess the patency of the radial and ulnar arteries.
- A Doppler exam can be used to check the ulnar artery patency.
Diagrams & Photos
-
Decreased capillary refill after exsanguination and compression of the ulnar and radial arteries in the Allen test. -
Return of capillary refill after releasing pressure from the intact ulnar artery. -
Ulnar artery Doppler exam -
Ulnar artery thrombosis
Key Points
- Hypothenar hammer syndrome is caused by thrombosis of the ulnar artery in Guyon's canal.
- Aneurysms of the ulnar artery occur in Guyon's canal.
- The ulnar artery is at risk for injury during carpal tunnel surgery.