What is the appropriate emergency department management for a proximal humerus surgical neck fracture?

Emergency Department Management for Humeral Surgical Neck Fracture

Begin with standard shoulder radiographs (AP views in internal and external rotation plus axillary or scapula-Y view), provide analgesia and immobilization with a sling, assess for neurovascular injury, and obtain CT without contrast if surgical management is being considered or if radiographs show complex fracture patterns. 1

Initial Assessment and Imaging

Radiographic Evaluation

• Obtain a minimum 3-view shoulder series immediately: AP in internal rotation, AP in external rotation, and axillary or scapula-Y view 1
• The axillary or scapula-Y view is critical—AP views alone can miss associated glenohumeral dislocations 1
• Radiographs establish fracture presence, displacement, and guide initial treatment decisions 1

When to Add CT Imaging

CT shoulder without IV contrast is usually appropriate as the next step after positive radiographs for proximal humerus fractures 1. The evidence strongly supports this:

• CT changes clinical management in up to 41% of proximal humeral fractures 1
• CT provides superior characterization of fracture morphology, especially in comminuted patterns 1
• Order CT if: surgical fixation is being considered, fracture pattern appears complex on radiographs, or you need better characterization of fragment displacement 1

Important caveat: MRI is inferior to CT for evaluating fracture planes in proximal humerus fractures 1. Only consider MRI if assessing rotator cuff injury in patients NOT planned for surgical fixation 1.

Immediate ED Management

Neurovascular Assessment

• Document axillary nerve function (deltoid motor, lateral shoulder sensation)
• Assess radial, median, and ulnar nerve function
• Check brachial artery pulse and distal perfusion
• Neurovascular injury warrants emergent orthopedic consultation 2

Pain Control and Immobilization

• Provide adequate analgesia (multimodal approach with opioids and NSAIDs as appropriate)
• Immobilize in a sling and swathe
• Ice application for comfort
• Keep patient NPO if surgical intervention is likely

Disposition Algorithm

Minimally Displaced or Undisplaced Fractures

• Most surgical neck fractures are minimally displaced and can be managed nonoperatively 2, 3
• Discharge with orthopedic follow-up in 5-7 days
• Sling immobilization
• Early pendulum exercises may begin after initial pain subsides

Significantly Displaced Fractures

The decision tree depends on patient age and fracture characteristics:

Young, healthy patients (age <65) with displaced fractures:

• Emergent orthopedic consultation for likely operative fixation 4
• Admit or arrange urgent outpatient surgical evaluation
• Keep NPO

Elderly patients (age >75) with significant comorbidities:

• Consensus supports nonoperative management in sicker, older patients even with displacement 4
• Can discharge with close orthopedic follow-up unless pain control inadequate
• Consider admission for pain management if needed

Fracture-Dislocations

• These are biomechanically unstable and require emergency surgical referral 5
• Do NOT attempt closed reduction in the ED without orthopedic consultation
• Admit for urgent operative management

Critical Pitfalls to Avoid

1. Missing the axillary/scapula-Y view: This is the most common imaging error—glenohumeral dislocations are frequently misclassified on AP views alone 1

2. Inadequate neurovascular documentation: Axillary nerve injury occurs in up to 40% of proximal humerus fractures; document this before any manipulation

3. Attempting reduction without orthopedic consultation: Surgical neck fractures with displacement may require operative fixation—closed reduction attempts can worsen soft tissue injury

4. Ordering MRI instead of CT: MRI is inferior for fracture characterization in proximal humerus fractures 1

5. Failing to address osteoporosis: These fractures are strongly associated with decreased bone mineral density and future fracture risk—ensure outpatient osteoporosis evaluation is arranged 2

Orthopedic Consultation Triggers

Obtain emergent consultation for:

• Fracture-dislocations
• Neurovascular compromise
• Open fractures
• Significantly displaced 3-part or 4-part fractures in younger patients

Arrange urgent outpatient consultation for:

• Minimally displaced fractures
• Displaced fractures in elderly patients with comorbidities where nonoperative management likely