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Humerus Shaft Fracture

Medical term: Humeral Diaphyseal Fracture

Overview

A humerus shaft fracture is a break in the middle portion of the upper arm bone, between the shoulder and the elbow. These fractures can result from a direct blow, a fall, or a twisting injury and are seen across all age groups. One important consideration with this injury is the proximity of the radial nerve, which can be stretched or bruised at the time of fracture, potentially causing temporary weakness or numbness in the hand.

At our San Diego orthopedic practice, we carefully assess each humerus shaft fracture for associated nerve injury and overall fracture alignment. Many of these fractures are effectively treated with a functional brace that allows controlled motion while the bone heals. When surgery is indicated, options include plate fixation or intramedullary nailing, both of which provide reliable stabilization and allow earlier rehabilitation.

Frequently Asked Questions

Can a humerus shaft fracture damage nerves?
Yes. The radial nerve runs along the humerus shaft and can be injured during the fracture. Symptoms of radial nerve involvement include wrist drop or numbness on the back of the hand. Most nerve injuries recover on their own, but they are monitored closely.
Is surgery always needed for a humerus shaft fracture?
No. Many humerus shaft fractures heal successfully with a functional brace. Surgery with a plate and screws or an intramedullary nail is recommended when the fracture is significantly displaced, fails to heal with bracing, or is associated with nerve or vascular injury.
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