Smith’s Fracture Diagnosis and Management

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A 15 yo male with a Smith’s Fracture.

The patient had fallen onto his flexed left wrist during a football match. There were no other injuries, however there was a history of a right sided wrist fracture in the recent past.

On examination, the wrist appeared deformed in a classic ‘garden spade shape’, however the patient was comfortable and the limb was neurovascularly intact. There was specific exclusion of any acute Median nerve deficits. This is the patient’s non-dominant hand.

X-rays were taken, as shown below:

There is a displaced fracture of the distal radial metaphysis with volar angulation of the distal fracture fragment. The fracture does not appear to extend into the articular surface. There is also a small avulsion fracture of the ulnar styloid process and a buckle fracture of the distal ulna. The carpal bones appear normal.

The diagnosis is a Smith’s Fracture of the left forearm named after Smith, who first described this in 1847(1)

A Smith’s Fracture, sometimes also known as a Goyrand Fracture is a distal radial fracture with volar angulation of the distal fracture fragments. It usually results from a fall onto a flexed wrist or from a direct blow to the dorsal forearm.

Types of Smith’s Fracture

  1. Type I: The most common type(85%) of Smith’s fracture is the extra-articular transverse fracture through the distal radius, as in this case. Thomas(2) first described this fracture type as also being associated with a fracture of the ulnar styloid(as seen here).
  2. Type II: Fractures may also be intra-articular. These usually cross into the dorsal articular surface. These type of fractures are also referred to as reverse Barton fractures.
  3. Type III: Fractures may also be juxta-articular, entering the radoiocarpal joint.

Smith’s vs Colles Fracture.

A Smith’s Fracture is considered the opposite of a Colles fracture.

In most cases Smith’s Fractures are unstable and will need internal fixation. Attemps at initial reduction can be achieved by the opposite positioning to that of a colles fracture. Supination can aid in reduction and plastering in the fully supinated position with the elbow flexed at 90 degrees can aid in keeping the fracture fragments from slipping. A followup X-ray needs to be performed several days after the plaster is applied to assess for slippage.

Complications

This is a difficult fracture to reduce and one that is prone to slippage of fracture fragments. Mal-union can result in significant deformity sometimes called a ‘garden spade deformity’. Due to the instability of the fracture, most will require internal fixation.

The fracture may also result in acute median nerve injury (refer to examination of the hand), or delayed carpal tunnel syndrome secondary to narrowing of the entry into the canal.

Post Reduction and Plastering

The patient underwent reduction of the fracture, under sedation and was placed in an above elbow cast, with the wrist extended. The results are shown below. The reduction is acceptable until referral for internal fixation can occur.

References

  1. Smith RW. A Treatise on Fractures in the Vicinity of Joints, and on Certain Forms of Accidental and Congenital Dislocations, pp. 129-175. Dublin: Hodges and Smith.
  2. Thomas FB. Reduction of Smith’s Fracture. J Bone and Joint Surgery. Vol 39B, No 3, August 1957 pp 463-470

Peter Kas

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Dr Peter Kas

Emergency Physician, Educator. Key Interests: Resuscitation, Airway, Emergency Cardiology, Clinical Examination. Creator resus.com.au.

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