Fracture of the Radius and Ulna in Dogs
By: Dr. David Diamond
Section: Information In-depth
Radius and ulna fractures are common and motor vehicle trauma is the most frequent cause. These injured animals tend to be young, non-neutered males who roam away from home and get hit by a car. Animals of both sexes and of any age are susceptible to this type of trauma if not kept restrained. Small dogs (e.g. Italian greyhound) tend to be especially susceptible to these types of fractures with relatively minor trauma, like jumping off a bed
Animals can develop non-traumatic fractures of the radius or ulna when certain disease conditions exist. These fractures, also known as "pathologic fractures,"can occur if the animal is malnourished, has a systemic illness such as kidney disease, has an endocrine disorder such as hyperparathyroidism, has a bone infection (osteomyelitis) or has cancer of the bone.
Immature bones have growth plates (physes) that are still "open" and growing.
These regions of the young bone are susceptible to damage caused by the trauma that can result in premature "closure." Due to the interrelationship between the two bones of the forearm during growth, premature closure of one growth plate before maturity can cause abnormal curvature of the bones and joint incongruities. This can result in future
pain
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Depending on the location and amount of
energy
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Fractures of the diaphysis of the radius and ulna can be classified as "open" or "closed" depending on whether the skin surface has been damaged during the injury. Open fractures have a greater chance of getting infected and may have more complications than closed fractures.
As with all fractures, fractures of the radius and ulna can also be classified as "simple" if each bone breaks into two pieces or "comminuted" if there are multiple pieces.
Each case of antebrachial fracture needs to be evaluated in its entirety (age of animal, severity of the fracture, experience of the surgeon and financial concerns of the owner) to determine the most appropriate and best form of treatment.
Inappropriate case management, inadequate surgical stabilization or poor aftercare can lead to complications, such as non-unions (fractures that will not heal), malunions (fractures that heal in an abnormal direction or orientation), osteomyelitis (bone infection), arthritis or a non-functional leg.
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