What is the appropriate management for a minimally depressed radial head fracture?

Management of Slightly Depressed Radial Head Fracture

Minimally displaced radial head fractures should be treated non-operatively with early active mobilization, without the need for formal physical therapy. 1, 2, 3

Initial Management Algorithm

Immediate treatment consists of:

• Joint aspiration if significant effusion/hemarthrosis present 4
• Broad arm sling immobilization for 2 days only 4
• Early active range of motion exercises starting immediately after brief immobilization 1, 3

Key Decision Points

When Non-Operative Management is Appropriate:

• Displacement ≤2 mm 1
• No mechanical block to pronation/supination 1, 5
• No associated ligamentous injuries 2

Critical assessment at first follow-up (within 1 week):

• Test elbow collateral stability 4
• Assess for mechanical block to forearm rotation 1
• If stable: encourage active stretching beyond painful range 4

Red Flags Requiring Surgical Consideration:

• Mechanical block to pronation/supination 1
• Displacement >2 mm with associated injuries 1
• Comminution with loss of cortical contact 1
• Associated ligamentous injuries (Essex-Lopresti, terrible triad) 6, 2

Rehabilitation Approach

Home exercise program is superior to formal physical therapy for isolated minimally displaced fractures. A prospective randomized trial demonstrated that patients performing self-directed home exercises had significantly better DASH scores at 6 weeks compared to formal PT (p=0.021), with equivalent outcomes thereafter 3. This makes formal PT not cost-effective for this injury pattern 3.

Follow-Up Protocol

• First visit: 2-7 days post-injury for stability assessment 4
• Discharge criteria: Clinical improvement with functional range of motion 4
• Return instructions: Come back only if no improvement at 6 weeks 4
• Routine radiographic follow-up is unnecessary in most cases 4

Common Pitfalls to Avoid

1. Over-immobilization: Prolonged immobilization beyond 2 days leads to stiffness without benefit 4
2. Unnecessary PT referrals: Formal therapy provides no advantage over home exercises and increases costs 3
3. Missing associated injuries: Always assess for ligamentous instability, especially with any displacement, as this changes management entirely 1, 2
4. Routine imaging follow-up: Not indicated unless clinical improvement plateaus 4

The evidence strongly supports that slightly depressed (minimally displaced) radial head fractures represent a benign injury pattern when isolated, requiring only brief protection followed by patient-directed mobilization.