1. Ulna Fracture
What is an ulna fracture?
The ulna is one of two bones of the forearm. The two bones of the forearm, the
radius and the ulna, both span the distance from the elbow to the wrist joints.
How does an ulna fracture occur?
An isolated ulna fracture most commonly occurs by the forearm being struck by an
object (or a forearm striking an object). The common eponym for an isolated ulna
fracture is a "nightstick fracture," although there are many other common
mechanisms of this injury including falls, car accidents, and others.
What are the symptoms of an ulna fracture?
By far the most common symptom of an ulna fracture is pain. Other common
symptoms include swelling and deformity of the forearm. When you suspect a
forearm fracture, you should be seen by a physician and obtain x-rays to determine
if there is an ulna fracture present, and if there are any associated injuries.
In addition, the elbow must also be carefully examined to determine if there is a
dislocation within the elbow causing an injury pattern.
What is the treatment of an ulna fracture?
Isolated ulna fractures can most often be treated with a cast or fracture brace.
Usually a period of immobilization will allow the bone to heal adequately.
If there is a significant amount of displacement of the ulna fracture, the fracture is
considered 'unstable.' In these cases, the patient may benefit from surgical
stabilization of the fracture. The usual treatment is to use a plate and screws to
secure the fractured bone.
What are the complications of surgical treatment of ulna fractures?
The most common complications include:
o Painful Implants
Occasionally, the metal plate and screws can be tender and painful and
require removal. This is usually done at least a year after surgery.
Refracture of the bone is possible after plate removal.
o Infection
Infection is an unusual complication, but possible after any surgical
procedure. If infection is a problem, the metal implant will likely have
to be removed.
o Non-Healing Fracture
Non-healing, called a nonunion, occurs in about 5% of patients with
ulna fractures. These patients may require another surgical procedure
for bone grafting to obtain healing of the ulna fracture.