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Open fracture of sternum — Clinical Guidelines

Overview

An open fracture of the sternum is a severe injury often associated with high-energy trauma, such as motor vehicle accidents or falls from significant heights. Unlike isolated rib fractures, sternum fractures can lead to significant chest wall instability, complicating respiratory function and increasing the risk of associated injuries to underlying structures like the lungs and intercostal vessels. The clinical management of these injuries requires a multidisciplinary approach, focusing on immediate stabilization, meticulous surgical techniques to minimize complications, and comprehensive rehabilitation to optimize long-term outcomes. This guideline aims to provide clinicians with a comprehensive framework for the diagnosis, management, and follow-up care of patients with open fractures of the sternum.

Clinical Presentation

Patients with an open fracture of the sternum typically present with acute, severe chest pain exacerbated by movement or respiration. The pain often radiates to the shoulders and back, reflecting the extensive innervation of the thoracic region. Multiple rib fractures frequently accompany sternum injuries, contributing to chest wall instability, a condition characterized by paradoxical chest wall movement—a hallmark sign of flail chest. This instability significantly impairs respiratory mechanics, leading to hypoventilation, impaired gas exchange, and potentially life-threatening hypoxemia and hypercapnia [PMID:38317185]. Additionally, patients may exhibit signs of shock due to significant blood loss or associated injuries. Clinical examination should meticulously assess for signs of chest wall instability, respiratory distress, and associated injuries such as hemothorax, pneumothorax, or pulmonary contusions. These findings are crucial for guiding immediate management and surgical planning.

Diagnosis

Diagnosing an open fracture of the sternum involves a combination of clinical assessment and advanced imaging techniques. Radiographic imaging, including chest X-rays and CT scans, is essential for visualizing the extent of bone injury, associated rib fractures, and any underlying complications such as hemothorax or pneumothorax. CT scans provide detailed images that can help identify the degree of chest wall instability and the involvement of intercostal muscles and vessels [PMID:38317185]. In clinical practice, recognizing complications such as hemopneumothorax is critical, as these conditions can rapidly deteriorate patient status. Laboratory tests, including complete blood count (CBC) and coagulation profiles, are also important to assess for signs of hemorrhage and to guide transfusion needs. Electrocardiography (ECG) and arterial blood gas (ABG) analysis help evaluate cardiac function and respiratory status, respectively, providing a comprehensive picture of the patient's physiological state.

Management

The management of open fractures of the sternum aims to stabilize the patient, address immediate life-threatening conditions, and subsequently perform definitive surgical interventions with minimal tissue damage. Initial management focuses on stabilizing the airway, breathing, and circulation (ABCs). This includes securing the airway, providing mechanical ventilation if necessary, and controlling hemorrhage through appropriate fluid resuscitation and, if needed, blood transfusions. Definitive surgical intervention often involves internal fixation to stabilize the chest wall and prevent further complications. Recent advancements highlight the benefits of minimally invasive techniques, such as single-port video-assisted thoracoscopic surgery (VATS). This approach minimizes injury to chest wall structures, potentially reducing postoperative complications such as infection, pain, and functional impairments [PMID:38317185]. During surgery, meticulous care is taken to avoid damage to intercostal muscles, blood vessels, and nerves, which are crucial for preserving respiratory function and preventing long-term morbidity. Post-operatively, patients require close monitoring in an intensive care unit (ICU) setting to manage pain, prevent deep vein thrombosis (DVT), and ensure adequate respiratory support until chest wall stability is restored.

Surgical Techniques

Minimally Invasive Approaches: Single-port VATS offers a less invasive alternative to traditional open surgery, reducing trauma to the chest wall and minimizing scarring. This technique involves the use of specialized instruments and cameras inserted through a single small incision, allowing for precise internal fixation of fractures with less disruption to surrounding tissues [PMID:38317185].

Open Surgical Techniques: In cases where extensive damage or complex anatomical issues necessitate a more direct approach, traditional open surgery may be required. However, this method carries a higher risk of complications such as infection, nerve damage, and prolonged recovery due to greater tissue manipulation [PMID:38317185].

Complications

Complications associated with open fractures of the sternum can be severe and multifaceted, often stemming from both the initial injury and the surgical interventions employed. Traditional open operative reduction and internal fixation methods, while effective in stabilizing fractures, can lead to significant collateral damage. Damage to chest wall muscles, blood vessels, and nerves increases the risk of postoperative complications such as:

Infection: High rates of surgical site infections are a notable concern, particularly in open fractures where contamination is more likely [PMID:38317185].

Pain: Severe postoperative pain can hinder recovery and necessitate prolonged analgesic use, potentially leading to complications like respiratory depression or gastrointestinal issues.

Functional Deficits: Long-term impairments in upper limb, shoulder, and back functions are common, impacting patients' quality of life and ability to perform daily activities [PMID:38317185].

These complications underscore the importance of adopting minimally invasive techniques to mitigate these risks and optimize patient outcomes.

Prognosis & Follow-up

The prognosis for patients with open fractures of the sternum significantly improves with advanced surgical techniques that minimize tissue damage and promote faster recovery. Studies suggest that minimally invasive approaches, such as single-port VATS, not only reduce immediate postoperative complications but also enhance long-term functional recovery [PMID:38317185]. Follow-up care is critical and should include regular assessments of respiratory function, pain management, and physical rehabilitation to restore chest wall mobility and strength. Rehabilitation programs tailored to individual patient needs, focusing on gradual strengthening exercises and respiratory therapy, are essential for mitigating long-term functional deficits. Monitoring for signs of delayed complications, such as chronic pain or recurrent respiratory issues, is also vital to ensure optimal long-term outcomes. Early intervention and comprehensive follow-up care are key to improving patient prognosis and quality of life post-injury.

Key Recommendations

Immediate Stabilization: Prioritize airway management, ventilation support, and hemodynamic stabilization in the acute phase.

Advanced Imaging: Utilize CT scans for detailed assessment of chest wall injuries and associated complications.

Minimally Invasive Surgery: Consider single-port VATS for internal fixation to reduce complications and promote faster recovery.

Comprehensive Postoperative Care: Monitor for and manage postoperative infections, pain, and respiratory complications closely.

Rehabilitation: Implement a structured rehabilitation program focusing on respiratory function and chest wall mobility to enhance long-term outcomes.

Regular Follow-up: Schedule periodic evaluations to assess recovery progress and address any delayed complications effectively.

References

1 Wang J, Sun Z, Liu Y, Gong W, Wang J, Deng J et al.. Clinical effect of the internal fixation for rib fracture with single utility port complete video-assisted thoracoscopic surgery. Journal of cardiothoracic surgery 2024. link

1 papers cited of 3 indexed.

Open fracture of sternum