What is the purpose of arterial anastomosis around the elbow?

It ensures collateral circulation between the brachial artery and the upper ends of the radial and ulnar arteries. This maintains blood supply during elbow flexion, which can compress the main arteries.

Which arteries contribute to the elbow anastomosis?

Branches from three main arteries form the anastomosis: Brachial artery (profunda brachii, superior and inferior ulnar collateral arteries), radial artery (radial recurrent artery), and ulnar artery (anterior and posterior ulnar recurrent arteries, common interosseous artery).

What are the key anastomotic regions around the elbow?

There are five main regions: in front of the medial epicondyle, behind the medial epicondyle, in front of the lateral epicondyle, behind the lateral epicondyle, and above the olecranon fossa. Each involves specific artery branches connecting to maintain blood flow.

How does the anastomosis protect blood flow during elbow movement?

During elbow flexion, the main arteries may be compressed. The anastomotic network provides alternative pathways, ensuring continuous blood supply through collateral connections around the joint.

What arteries anastomose in front of the lateral epicondyle?

In this region, the radial collateral artery (a branch of the profunda brachii) connects with the radial recurrent artery from the radial artery.

Why is the elbow anastomosis clinically important?

It provides a safety net for blood circulation. If the brachial artery is blocked or injured, these collateral routes can help prevent ischemia in the forearm and hand.

Elbow Arterial Anastomosis – Collateral Circulation Explained