• Clinical science

Humerus fracture

Summary

Humerus fractures can result from direct or indirect trauma. They are classified according to their location as proximal, humeral shaft, or distal fractures. Proximal humerus fractures commonly occur in the elderly, while distal supracondylar fractures are the most common type of fracture in the pediatric population. Patients may present with localized pain, swelling, and deformities. Conservative treatment (splinting, casting, and physical therapy) often suffices for nondisplaced, closed fractures. While arteriovenous complications and displaced or open fractures usually require surgical treatment.

Epidemiology

References:[1]

Epidemiological data refers to the US, unless otherwise specified.

Etiology

References:[1][2]

Classification

  1. Proximal humerus fracture (common in the elderly)
    • The proximal humerus has four major segments: the anatomical neck, the humeral shaft, the greater tuberosity, and the lesser tuberosity (the surgical neck is distal to the lesser and greater tuberosity)
    • Commonly used classification (Neer) is based on whether one or more of these four segments have been displaced
  2. Humeral shaft fracture
    • Classified according to location: proximal third, middle third (most common location), distal third[2]
    • Or according to comminution: type A (no comminution), type B (butterfly fragment), and type C (comminution is present)
  3. Distal humerus fracture

References:[1][3]

Clinical features

  • Severe local pain: exacerbated during palpation or movement at shoulder or elbow
  • Local swelling (edema or bleeding), deformity, or crepitus
  • Shortening of the arm (associated with displacement)
  • Neurovascular complications may be present
  • Also see signs of fracture

The radial nerve runs through the radial sulcus of the upper arm and is especially at risk in fractures of the middle third (midshaft) of the humerus!

References: [1]

Diagnostics

References:[1][2][4]

Treatment

Conservative therapy

  • Indication: nondisplaced, closed fractures
  • Procedures
    • Hanging-arm cast or coaptation splint and sling for approx. one to two weeks; subsequent follow‑up X‑ray and brace
    • Early physical therapy to restore function

Surgical treatment

Open fractures require irrigation and prophylactic antibiotic therapy!References: [1][2][4][3][5]

Complications

Humerus fracture nerve palsies
Nerve Clinical features
Axillary
  • Flat deltoid
  • ↓ Arm abduction at shoulder > 15 degrees
  • ↓ Sensation over deltoid and lateral arm
Radial
  • Wrist drop
  • ↓ Grip strength
  • ↓ Sensation over dorsal hand and posterior arm
Ulnar
Median

Injuries to the median nerve and brachial artery, which both cross the elbow, are common complications of supracondylar fractures!

References:[1][4][6]

We list the most important complications. The selection is not exhaustive.

last updated 12/06/2019
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