Conservative Treatment with Sling Immobilization and Early Mobilization
For a nondisplaced transverse fracture of the surgical neck of the humerus, conservative (non-operative) treatment is the appropriate management approach, as this fracture pattern consistently achieves good to excellent functional outcomes in 80-90% of patients without surgery 1.
Initial Management
Begin with sling immobilization for approximately 3 weeks 2. This provides comfort and protects the fracture during the initial healing phase while preventing excessive displacement.
Rehabilitation Protocol
The rehabilitation should follow this algorithmic progression:
Week 1 (Days 1-7)
- Pendulum exercises starting at post-injury day 1 2
- Passive range of motion (ROM) exercises beginning at 2 days post-injury 2
- Continue sling use for comfort and protection
Weeks 2-3
- Continue passive ROM exercises
- Maintain sling immobilization
- Progress pendulum exercises as tolerated
Weeks 3-6
- Discontinue sling at 3 weeks 2
- Begin active-assisted ROM exercises at 3 weeks 2
- Progress to active ROM exercises at 3 weeks 2
Week 6 and Beyond
- Unlimited ROM typically permitted at 4-6 weeks 2
- Begin strengthening exercises at 6 weeks 2
- Remove all restrictions at 6 weeks 2
Rationale for Conservative Management
Nondisplaced or minimally displaced proximal humerus fractures lead to good outcomes in 80-90% of patients treated conservatively 1. The surgical neck fracture pattern you describe, when nondisplaced, falls into this favorable category. Surgery should be reserved for fractures with severe humeral head compromise, gross instability between shaft and head, or displacement that will lead to symptomatic malunion 1—none of which apply to your nondisplaced fracture.
Critical Monitoring Points
Assess for Neurovascular Injury
- Check axillary nerve function (deltoid sensation and motor function) 3
- Evaluate vascular status including pulses, capillary refill, pallor, and limb temperature 4
- Neurovascular injury occurs in 0.09-5% of proximal humerus fractures 4
Imaging Confirmation
- Standard orthogonal radiographs in three planes (AP internal rotation, AP external rotation, and axillary or scapula-Y view) 5
- The axillary or scapula-Y view is vital to confirm no glenohumeral dislocation 5
- CT without IV contrast is usually not necessary for truly nondisplaced fractures but may be appropriate if radiographs are indeterminate 5
Common Pitfalls to Avoid
Missing associated dislocation: Always obtain axillary or scapula-Y views, as AP views alone can miss glenohumeral dislocations 5
Premature aggressive mobilization: While early passive motion is beneficial, avoid active ROM before 3 weeks to prevent displacement
Inadequate neurovascular assessment: Axillary nerve injury is common and must be documented initially and monitored throughout treatment 3
Overlooking patient-specific factors: While the fracture pattern suggests conservative treatment, consider the patient's age, functional demands, and bone quality 6. However, for a truly nondisplaced fracture, these factors rarely change the initial conservative approach.