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The role of post-reduction radiographs after shoulder dislocation
Joseph H Kahn1, Supriya D Mehta
1Department of Emergency Medicine, Boston Medical Center, Boston University School of Medicine, Boston, Massachusetts, USA.
The Journal of Emergency Medicine
|August 19, 2007
Summary
Post-reduction X-rays reveal additional fractures in shoulder dislocations not seen on pre-reduction films. However, these newly identified fractures rarely alter emergency department patient management.
Area of Science:
- Orthopedic Surgery
- Emergency Medicine
- Radiology
Background:
- Anterior shoulder dislocations are common emergency department presentations.
- Radiographic assessment is crucial for diagnosing associated fractures and confirming reduction.
Purpose of the Study:
- To evaluate the clinical significance of post-reduction radiographs in patients with anterior shoulder dislocations.
- To determine if post-reduction X-rays provide additional information beyond pre-reduction imaging.
Main Methods:
- Prospective observational study involving 55 patients with shoulder dislocations.
- Clinicians recorded preliminary readings of pre- and post-reduction X-rays.
- Blinded attending radiologist reviewed all films for fracture detection and reduction confirmation.
Main Results:
- One of eight fractures (1.8%) identified on preliminary post-reduction X-ray readings was missed on pre-reduction films.
- A blinded radiologist identified 16 fractures on post-reduction X-rays, with 6 (15.0%) not visible on pre-reduction films.
- All post-reduction X-rays confirmed successful shoulder relocation, with no persistent dislocations.
Conclusions:
- While most fractures associated with shoulder dislocations are visible on pre-reduction radiographs, a significant proportion may only be apparent post-reduction.
- The additional fractures identified on post-reduction X-rays did not alter patient management in the emergency department.
- Post-reduction radiographs are valuable for confirming successful reduction and detecting subtle fractures in shoulder dislocations.
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