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What Causes Midshaft Humerus Fractures in Adults?
Published: May 03, 2024
Midshaft humerus fractures are breaks in the long bone of the upper arm. These fractures can cause significant pain and require careful treatment to ensure proper healing.
Understanding the Anatomy
The humerus is the largest bone in the upper arm, connecting the shoulder and elbow. It serves as an attachment point for various muscles, such as the biceps and triceps, and is supplied by major arteries like the brachial artery. The radial nerve runs near the humeral shaft, making it vulnerable to injury in fractures.
Who Is at Risk?
Midshaft humeral fractures occur in about 2% of all fractures and are more common in two groups: young males involved in high-energy trauma and older females who experience low-velocity falls. Risk factors include age, osteoporosis, and trauma, often resulting from a direct blow or fall.
Mechanism of Injury
These fractures usually result from direct trauma to the arm or overuse causing a stress fracture. Activities like arm wrestling or throwing can lead to midshaft fractures due to intense muscle contractions or underlying stress fractures.
Frequently Asked Questions
It's a break in the long bone of the upper arm, often due to trauma.
Young males in high-energy activities and older females with low-velocity falls.
Usually from direct trauma or strong muscle contractions during activities.
Yes, the radial nerve can be affected, leading to wrist and finger weakness.
Severe arm pain, swelling, and possible nerve-related symptoms.
Key Takeaways
Midshaft humerus fractures can have significant impacts if not identified and treated properly.
References
- Ekholm R, Adami J, Tidermark J, et al. Fractures of the shaft of the humerus. J Bone Joint Surg Br 2006; 88:1469.
- Ogawa K, Yoshida A. Throwing fracture of the humeral shaft. Am J Sports Med 1998; 26:242.
This article has been reviewed for accuracy by one of the licensed medical doctors working for Doctronic. Always discuss health information with your healthcare provider.
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