Clavicle Fracture Surgery: What Surgeons Need to Know

Introduction to Clavicle Fractures

Clavicle fractures are among the most common fractures in the human body, accounting for approximately 2.6% of all fractures. The clavicle, or collarbone, plays a crucial role in shoulder function, acting as a strut between the sternum and the scapula. Given its subcutaneous position and S-shaped anatomy, the clavicle is susceptible to injury, particularly from direct trauma such as falls, sports injuries, or vehicular accidents.

Indications for Clavicle Fracture Fixation

While many clavicle fractures can be treated non-operatively, certain cases necessitate surgical intervention. The primary indications for clavicle fracture fixation include:

1. Displaced Midshaft Fractures: Fractures with significant displacement or shortening of more than 2 cm often benefit from surgical fixation to ensure proper alignment and function.
2. Open Fractures: Any fracture with a breach in the skin requires surgical intervention to reduce the risk of infection and to stabilize the fracture.
3. Neurovascular Compromise: Fractures associated with vascular injury or brachial plexus involvement necessitate urgent surgical management.
4. Comminuted Fractures: Multiple fracture fragments, particularly in the midshaft, often require fixation to restore the normal anatomy and prevent malunion.
5. Floating Shoulder: A condition where both the clavicle and scapula are fractured, leading to instability of the shoulder girdle, typically requires surgical stabilization.

Preoperative Evaluation

A thorough preoperative evaluation is crucial for successful clavicle fracture fixation. This includes:

1. Patient History and Physical Examination: Assessing the mechanism of injury, associated symptoms, and any pre-existing conditions is essential. A focused examination of the shoulder, neurovascular status, and skin condition should be conducted.
2. Radiographic Assessment: Standard AP and 30-degree cephalic tilt views of the clavicle are necessary to evaluate the fracture pattern. A CT scan may be indicated in complex fractures or when there is a suspicion of intra-articular extension.
3. Patient Counseling: Discuss the risks, benefits, and potential outcomes of the surgery with the patient. It's essential to set realistic expectations and to ensure the patient understands the rehabilitation process.

Contraindications for Surgery

Although clavicle fracture fixation is generally safe, there are contraindications that must be considered:

1. Severe Osteoporosis: In patients with significant bone thinning, the risk of fixation failure is high.
2. Infection: Active infection at the surgical site or systemic sepsis is a contraindication until the infection is resolved.
3. Patient Non-Compliance: If a patient is unlikely to comply with postoperative instructions, including physical therapy, non-operative management may be preferable.
4. Medical Comorbidities: Patients with severe cardiovascular or pulmonary disease may not tolerate surgery well and should be carefully evaluated.

Surgical Techniques and Steps

Several surgical techniques are available for clavicle fracture fixation, with the choice of method depending on the fracture type and surgeon preference. The two most commonly used techniques are plating and intramedullary nailing.

1. Plate Fixation

Indications: Displaced midshaft fractures, comminuted fractures, and fractures with shortening.

Steps:

• Incision: A horizontal or oblique incision is made directly over the clavicle, centered over the fracture site.
• Fracture Exposure: The fracture is exposed by carefully elevating the periosteum, taking care to preserve soft tissue attachments.
• Reduction: The fracture is reduced using clamps or manual manipulation. Achieving anatomic alignment is critical.
• Plate Selection and Placement: A pre-contoured plate is selected based on the fracture pattern. The plate is positioned superiorly or anteriorly, and screws are inserted to fix the plate to the clavicle.
• Wound Closure: The wound is irrigated, and the incision is closed in layers, taking care to minimize tension on the skin.

Advantages: Provides rigid fixation and allows for early mobilization.

Disadvantages: Risks include hardware irritation, nonunion, and infection.

2. Intramedullary Nailing

Indications: Simple transverse fractures, minimally comminuted fractures, and cases where minimal soft tissue dissection is desired.

Steps:

• Incision: A small incision is made near the sternal or acromial end of the clavicle.
• Entry Point Preparation: An entry point is created at the appropriate end of the clavicle using a drill or awl.
• Nail Insertion: An intramedullary nail is inserted through the entry point and advanced across the fracture site.
• Fracture Reduction: The fracture is reduced either closed or with minimal open reduction techniques, ensuring alignment before advancing the nail fully.
• Securing the Nail: The nail is locked in place with screws to prevent rotation and shortening.
• Wound Closure: The incision is closed, and sterile dressing is applied.

Advantages: Minimally invasive, less soft tissue disruption, and a cosmetically favorable scar.

Disadvantages: Potential for rotational instability, difficulty in removing the nail, and irritation at the insertion site.

Postoperative Care

Postoperative care is vital for ensuring a good outcome following clavicle fracture fixation. Key aspects include:

1. Pain Management: Adequate analgesia, typically with a combination of NSAIDs and opioids, is essential in the immediate postoperative period.
2. Immobilization: The arm is typically immobilized in a sling for the first few weeks to protect the repair and minimize pain.
3. Physical Therapy: Early passive range of motion exercises are encouraged within the first two weeks to prevent stiffness. Gradual progression to active exercises and strengthening occurs over the next 6-12 weeks.
4. Wound Care: Incision sites should be monitored for signs of infection, and sutures or staples are typically removed within 10-14 days.
5. Follow-up: Regular follow-up appointments with radiographs to assess fracture healing and hardware position are necessary. Any signs of nonunion or hardware failure should prompt further investigation.

Possible Complications

Complications, while uncommon, can occur following clavicle fracture fixation. These include:

1. Nonunion or Delayed Union: Occurs in 5-10% of cases, often necessitating further surgical intervention.
2. Infection: Superficial or deep infections can occur, particularly with open fractures.
3. Hardware Irritation: Plates or nails can cause irritation, especially in thin patients, sometimes requiring hardware removal.
4. Neurovascular Injury: Though rare, injury to the brachial plexus or subclavian vessels can occur during surgery.
5. Scar Formation: Hypertrophic or keloid scars can be problematic, especially with large incisions.

Different Techniques in Clavicle Fracture Fixation

Several variations in technique can be employed depending on the surgeon’s experience and the specifics of the fracture:

• Pre-contoured Plates: These plates are designed to match the natural S-shape of the clavicle, allowing for better anatomical fixation.
• Anatomical Locking Plates: These plates provide multiple points of fixation and are particularly useful in comminuted fractures.
• Hybrid Fixation: Combines plating with intramedullary nailing, providing the advantages of both techniques.

Prognosis and Outcome

The prognosis for clavicle fractures treated with fixation is generally excellent, with most patients achieving full return to function within 3-6 months. Factors that influence outcome include:

• Fracture Type: Simple fractures tend to heal more predictably than comminuted or segmental fractures.
• Patient Compliance: Adherence to postoperative care and rehabilitation is critical for a successful outcome.
• Surgical Technique: Proper surgical technique, including adequate reduction and fixation, is essential to prevent complications.

Alternative Options

For patients who are not candidates for surgery or prefer non-operative management, alternatives include:

• Non-Operative Management: This involves immobilization in a sling for 4-6 weeks followed by gradual rehabilitation. This approach is suitable for non-displaced fractures or patients with significant medical comorbidities.
• Bone Stimulation: Low-intensity pulsed ultrasound or electromagnetic field therapy can be used to promote fracture healing in cases of delayed union.

Average Cost of Clavicle Fracture Fixation

The cost of clavicle fracture fixation varies depending on geographic location, the complexity of the surgery, and the type of fixation used. On average:

• Surgical Costs: The total cost, including surgeon fees, anesthesia, and hospital stay, can range from $6,000 to $20,000.
• Hardware Costs: Plates, screws, and nails can add an additional $1,000 to $5,000 to the total cost.

Recent Advances in Clavicle Fracture Fixation

Recent advances in clavicle fracture fixation focus on improving outcomes and reducing complications. These include:

• Biodegradable Implants: Research is ongoing into the use of biodegradable plates and screws, which would eliminate the need for hardware removal.
• Minimally Invasive Techniques: Advances in imaging and surgical tools have enabled more minimally invasive approaches, reducing recovery time and scarring.
• 3D Printing: Custom 3D-printed plates based on patient-specific anatomy are being explored to improve fit and function.

Conclusion

Clavicle fracture fixation remains a cornerstone of orthopedic trauma surgery, with a wide range of techniques available to address the various fracture patterns encountered. While non-operative management remains an option for certain cases, surgical fixation offers the best chance for optimal functional recovery in displaced, comminuted, or complex fractures. With ongoing advances in surgical techniques and technology, the outcomes for patients continue to improve, making clavicle fixation a reliable and effective treatment modality.