Place the patient supine with the arm abducted and flexed 90 degrees at the elbow
Place the probe axially visualizing the ulnar nerve in cross-sectional view (see next page)
The ulnar nerve can be visualized in the ulnar sulcus and tracked proximally – it should not be blocked inside the sulcus due to risk of compression injury
Insert the needle from the lateral end of the probe and advance the needle in-plane
Inject local anaesthetic 3-5 mL perineurally
In-plane needle approach to block the ulnar nerve proximal to the elbow
