What is the primary purpose of Cozen's Test?

Cozen's Test is primarily utilized to confirm the presence of lateral epicondylitis, commonly known as tennis elbow. This test specifically assesses pain and discomfort in the region of the lateral epicondyle when the patient performs wrist extension against resistance. When the common extensor tendons, primarily the extensor carpi radialis brevis, become inflamed or degenerate, it leads to lateral elbow pain, which is what Cozen's Test aims to elicit.

During the test, if the patient experiences pain localized to the lateral epicondyle while resisting wrist extension, it strongly suggests lateral epicondylitis. This makes Cozen's Test a vital component of the assessment for this condition, as it directly targets the mechanics and musculature associated with the lateral elbow. The clarity of the test in indicating lateral epicondylitis is why it is fundamental in the evaluation process for this specific type of upper extremity tendonitis.