Executive Editor: Chris Colton

Authors: Dominik Heim, Shai Luria, Rami Mosheiff, Yoram Weil

Forearm shaft Transverse simple fracture of the radius

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The only adult forearm shaft fractures in which a satisfactory functional outcome can be expected after nonoperative treatment are minimally displaced, or stably reduced, isolated ulnar fractures with no compromise of either radioulnar joint.


In all other cases, if nonoperative treatment is necessary because of severe soft-tissue compromise or the patient being unfit for surgery, the functional outcome will inevitably be suboptimal.

General considerations enlarge

The basic principles of nonoperative treatment of adult forearm shaft fractures are:

  1. Both wrist and elbow joints must be included in the cast
    Note: Mackay et al. and Sarmiento & Latta suggest that in isolated ulnar fractures, above elbow splintage is not necessary.
  2. The cast should be well-padded and split along its whole length in any injury where progressive swelling is to be expected
  3. The general form of the forearm should be restored
  4. The elbow joint is immobilized in 90° flexion
  5. The cast should not extend beyond the proximal palmar flexor crease, in order to permit full flexion of the MCP joints of the fingers.
  6. The thumb should not be included in the cast

General considerations enlarge

Sarmiento and Latta (Closed Functional Treatment of Fractures, Springer Verlag, 1981, p.384) recommend that the cast be applied with the arm suspended from Chinese fingers traps and the elbow at a right angle. This results in a forearm posture of "relaxed supination": they combine this with careful moulding anteroposteriorly in such a manner as to separate the two bones and tension the interosseous membrane.

General considerations enlarge

Meticulous clinical observation for compartment syndrome must be undertaken. Watch out for increasing inappropriate pain, especially with passive stretching of the muscles of the affected compartment(s).

Additional authorities

v2.0 2013-07-09