Scenario 6: Lateral Epicondylitis

Scenario 6: Lateral Epicondylitis
A 17-year-old male presents to the clinic with a chief complaint of pain in his right elbow. He says the pain is sharp, especially with pronation and supination.  He noticed the pain several weeks ago after his tennis team went to a regional competition. When he rests, the pain seems to go away. The pain is alleviated when he takes Naprosyn. No history of trauma or infection in the elbow. Past medical and social history non contributary. He is a junior at the local high school and just started taking tennis lessons 2 months ago and his coach is working with him on his backhand serve. Focused physical exam revealed point tenderness over the lateral epicondyle which increases with pronation and supination. The APRN diagnoses him with lateral epicondylitis and orders a wrist splint to prevent wrist flexion.
Question:
Why did the APRN feel a wrist splint would be helpful? What patient characteristics lead to this diagnosis.  
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