Clavicle Fractures

The clavicle, or collarbone, is a long, slender bone that connects the shoulder blade (scapula) to the breastbone (sternum). This bone plays a crucial role in the function and stability of the shoulder, acting as a strut to support shoulder movement while protecting underlying nerves and blood vessels.

A clavicle fracture occurs when this bone is subjected to a force that exceeds its strength, causing it to break. Clavicle fractures are common, particularly in physically active individuals, and they account for approximately 5% of all adult fractures. These fractures can range in severity from simple breaks, where the bone is cracked but aligned, to complex fractures, where the bone is shattered or displaced.

Clavicle fractures are often the result of direct trauma or excessive stress on the shoulder. Some of the most common causes include:

1. Falls: Falling onto an outstretched hand or directly onto the shoulder is one of the leading causes of clavicle fractures. This is particularly common in sports like cycling, skiing, or contact sports where falls are frequent.
2. Direct Impact: A direct blow to the collarbone, often seen in contact sports such as football or rugby, can result in a fracture. Motor vehicle accidents or high-energy impacts can also directly damage the clavicle.
3. Birth Injuries: In newborns, clavicle fractures can occur during a difficult delivery, particularly if there are complications such as shoulder dystocia.
4. Repetitive Stress: While less common, repetitive stress or overuse can lead to stress fractures in the clavicle. This is sometimes seen in athletes who perform repetitive upper-body movements, such as weightlifters or pitchers.

Certain factors can increase the likelihood of sustaining a clavicle fracture. These include:

1. Age: Clavicle fractures are most common in two age groups: children and young adults under 25, who are often involved in high-impact sports or activities, and older adults, whose bones may be more fragile due to conditions like osteoporosis.
2. Participation in Sports: Athletes participating in contact sports, such as football or hockey, or high-impact activities, like cycling or snowboarding, are at greater risk of clavicle fractures.
3. Bone Health: Conditions such as osteoporosis or osteopenia weaken bones, making them more susceptible to fractures from minor trauma.
4. Gender: Men are slightly more likely to sustain clavicle fractures than women, likely due to higher participation in riskier physical activities.
5. Previous Injuries: A history of fractures, especially in the shoulder area, can increase the likelihood of reinjury.

The symptoms of a clavicle fracture can vary, depending on the severity of the break. Common signs and symptoms include:

1. Pain – Severe pain at the site of the fracture is the most noticeable symptom. The pain often worsens with shoulder or arm movement.
2. Swelling and bruising – Swelling and bruising around the collarbone are typical and may spread to the surrounding chest and shoulder areas.
3. Deformity – In cases of displaced fractures, the broken ends of the clavicle may create a visible bump or cause the shoulder to droop downward.
4. Limited movement – Patients may experience difficulty moving the affected arm or shoulder, often cradling the arm to alleviate discomfort.
5. Grinding sensation – A noticeable grinding or clicking sensation (known as crepitus) may occur when attempting to move the arm or shoulder, indicating that the broken bone ends are rubbing against one another.
6. Numbness or tingling – In rare cases, nearby nerves may be affected, resulting in numbness, tingling, or changes in skin color in the arm or hand.

Dr. Ziegler emphasizes the importance of early and accurate diagnosis for clavicle fractures to ensure the best possible treatment outcome. During the evaluation, a thorough physical examination is conducted to assess pain, swelling, and deformity. Imaging tests, such as X-rays, are used to confirm the fracture and determine its type and severity.

X-rays typically provide clear images of the clavicle, allowing for detailed assessment of the fracture site. For more complex or multi-fragment fractures, or if soft tissue involvement is suspected, a CT scan may be recommended to obtain a more comprehensive view.