Surgical Anatomy: The acromio-clavicular articulation is arthrodial with two small facets. Violence often causes fractures rather than dislocation. Symptoms vary based on displacement extent and ligament rupture; pain increases with shoulder movement. Diagnosis made by prominence inspection, manipulation, and palpation to exclude fracture or false motion. Treatment involves upward traction for common luxations, retentive dressing, and sling immobilization. Operative treatment is rare but may be needed in exceptional cases. After-treatment includes monitoring for deformity recurrence and healing time of 3-4 weeks.
<Callout type="important" title="Critical Step">Ensure thorough palpation to distinguish between dislocation and fracture.</Callout>
Symptoms vary greatly; complete loss of function may occur, but some patients retain partial use despite pain. Deformity varies with luxation type: upward shows prominent clavicle end, downward causes shoulder lowering and prominence of sternal extremity.
<Callout type="warning" title="Risk">Downward dislocation can cause brachial plexus injury due to decreased space between the clavicle and first rib.</Callout>
Diagnosis is made by inspection, manipulation, and palpation. Careful examination excludes fractures of the outer end or acromion; ligament avulsion may occur instead of rupture.
Treatment includes upward traction for common luxations, retentive dressing to prevent recurrence, and sling immobilization. Downward dislocation requires outward traction and direct clavicle manipulation.
Key Takeaways
- Dislocations of the outer end of the clavicle are often due to direct violence or muscular action.
- Symptoms include pain, deformity, and restricted shoulder movement.
- Proper diagnosis involves careful palpation and manipulation.
Practical Tips
- Use upward traction for common luxations and retentive dressing to prevent recurrence.
- Monitor the clavicle for any signs of recurrence after treatment.
Warnings & Risks
- Downward dislocation can lead to brachial plexus injury due to decreased space between the clavicle and first rib.
- Ensure thorough palpation to distinguish between dislocation and fracture.
Modern Application
While this chapter's diagnostic methods are still relevant, modern imaging techniques like X-rays provide clearer identification of fractures or ligament damage. The treatment approach remains largely unchanged but can be supplemented with advanced pain management options for better patient comfort.
Frequently Asked Questions
Q: What is the most common type of dislocation at the outer end of the clavicle?
The most common type is an upward luxation, characterized by a distinct prominence at the outer end of the clavicle.
Q: How can one distinguish between complete and incomplete dislocations?
Complete dislocations are identified when the articular facets clear each other, while incomplete dislocations show less prominent displacement.
Q: What is the recommended treatment for downward luxations of the clavicle?
Downward luxations can be treated with outward traction on the shoulder and direct manipulation of the clavicle in its middle third.