Elbow dislocation
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Elbow Dislocation. 3-6% of all elbow injuries Peak: 13-14 yrs after closure of physes High association with the following fractures Medial epicondyle Coronoid Radial head and neck. Modified hinge joint Very stable Joint congruity Opposing tension of triceps and flexors Ligaments

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Elbow Dislocation

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Elbow dislocation

Elbow Dislocation


Elbow dislocation

  • 3-6% of all elbow injuries

  • Peak: 13-14 yrs after closure of physes

  • High association with the following fractures

    • Medial epicondyle

    • Coronoid

    • Radial head and neck


Elbow dislocation

  • Modified hinge joint

  • Very stable

    • Joint congruity

    • Opposing tension of triceps and flexors

    • Ligaments

      • Most important: Medial Collateral Ligament


Mechanism of injury

Mechanism of Injury

  • Fall on an outstretched hand o elbow

    • Causes unlocking of the olceranon from the trochlea + translation of the articular surfaces

  • 2 types of dislocation

    • Posterior

    • Anterior


Malunion discussion

Malunion Discussion


Malunion

Malunion

  • Described to be a fractured bone that did not heal in an anatomic position

  • Bone may have:

    • Angulated

    • Rotated out of position

    • Overlapped with another bone


Elbow dislocation

  • Caused by:

    • Inadequate immobilization

    • Misalignment

    • Premature removal of an immobilizer


Non union

Non-union

  • A fracture that did not heal after a span of several months

  • Caused by:

    • Overdistraction

    • Excessive motion

    • Inadequate immobilization


Risk factors for poor fracture healing

Risk factors for poor fracture healing

  • Smoking

  • Excessive alcohol intake

  • Malnutrion

  • Diabetes

  • NSAID, corticosteroids

  • Anticonvulsants and Thyroid Hormone Replacement


Presentation

Presentation

  • History

    • A fracture that was not brought to a physician

    • Deformity

    • Pain, edema

    • Instability

  • PE

    • Deformity and tenderness


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