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Emergency and Acute Medicine – Neck Trauma, Penetrating, Anterior
Penetrating anterior neck trauma is a high-risk injury because of the density of vital vascular, aerodigestive, and neurologic structures within a small anatomic space. Wound severity is determined by violation of the platysma muscle; penetration beyond the platysma signifies a true penetrating neck injury and mandates further evaluation. For clinical assessment and management, the neck is anatomically divided into three zones. Zone I, extending from the clavicles to the cricoid cartilage, contains major vessels, lungs, trachea, esophagus, and thyroid, and injuries here carry the highest mortality due to potential thoracic involvement. Zone II, between the cricoid cartilage and the angle of the mandible, contains major vessels, trachea, esophagus, cervical spine, and spinal cord and is the most commonly injured zone due to its exposure. Zone III, from the angle of the mandible to the base of the skull, is difficult to access surgically and often requires specialized imaging. In children, the larynx is positioned higher and is relatively better protected by the mandible and hyoid bone.
The most common etiologies include gunshot wounds, stab wounds, and miscellaneous causes such as glass shards, metal fragments, or animal bites. Clinical manifestations depend on the structures involved. Vascular injury may present with active or persistent hemorrhage, expanding hematoma, pulse deficit, vascular bruit or thrill, Horner syndrome suggestive of carotid injury, or venous air embolism. Aerodigestive injury can cause respiratory distress, stridor, hemoptysis, tracheal deviation, subcutaneous emphysema, pneumothorax, hoarseness, aphonia, dysphonia, dysphagia, or odynophagia. Neurologic involvement may result in central or peripheral nervous system deficits. Historical features increasing concern include wounds crossing the midline, characteristics of the penetrating object, and whether a gunshot wound occurred at close range.
Physical examination must focus on airway patency and hemodynamic stability. Careful inspection is required to determine whether the platysma has been violated. Wounds should never be blindly probed, as this may precipitate catastrophic hemorrhage. If the platysma is not violated, local wound care and discharge may be appropriate. If platysma violation is present, management depends on patient stability and the involved zone. Unstable patients require immediate airway control and operative intervention. Stable patients undergo targeted diagnostic evaluation based on zone involvement.
Laboratory studies typically include type and cross-match, complete blood count, metabolic panel, and coagulation studies. Imaging begins with lateral neck and chest radiographs to identify foreign bodies, soft tissue injury, pneumothorax, or mediastinal air. In Zone I injuries, angiography remains the gold standard for vascular assessment, although CT angiography is frequently used due to speed and noninvasiveness, with the understanding that visualization of subclavian vessels may be limited. Esophageal injury evaluation requires a water-soluble contrast esophagram or dilute barium study, often combined with esophagoscopy, particularly when the wound approaches or crosses the midline or when subcutaneous air is present. Zone II injuries may be observed if asymptomatic, whereas symptomatic patients typically require surgical exploration. Zone III injuries generally require angiography or CT angiography if symptomatic. Bronchoscopy is useful for suspected tracheal injury. Surgical consultation is required for all penetrating neck wounds that violate the platysma, and immediate exploration is indicated for expanding or pulsatile hematoma, active bleeding, hemoptysis, bruit, subcutaneous emphysema, respiratory distress, air bubbling through the wound, Horner syndrome, or absent peripheral pulses.
Prehospital and early emergency department management prioritize airway protection and hemorrhage control. Frequent suctioning may be necessary to clear blood or secretions, and high-flow oxygen should be administered. Bag-valve-mask ventilation should be avoided if possible because it may force air through laryngotracheal injuries into surrounding tissues. Early orotracheal intubation is indicated for respiratory distress, stridor, air hunger, labored breathing, or expanding neck hematoma. Occlusive dressings should be applied over venous injuries to prevent air embolism. Routine cervical spine immobilization is not indicated in the absence of focal neurologic deficits, as it may obscure critical neck findings.
Definitive airway management typically involves rapid-sequence orotracheal intubation. Fiberoptic intubation is advantageous in stable patients because it allows direct visualization of airway injury. Blind nasotracheal intubation is contraindicated in the presence of airway distortion, apnea, or severe facial trauma. Percutaneous transtracheal ventilation may be considered when other methods fail but is contraindicated in upper airway obstruction. Cricothyroidotomy should be avoided if a hematoma overlies the cricothyroid membrane; tracheostomy is preferred in such cases. External hemorrhage should be controlled with direct pressure, and if unsuccessful, a Foley catheter balloon may be inserted into the wound to tamponade bleeding. Blind clamping of vessels is contraindicated. Uncontrolled bleeding or hemodynamic instability necessitates immediate transfer to the operating room. Prophylactic antibiotics and tetanus prophylaxis are recommended, and nasogastric tube placement should be avoided due to the risk of disrupting pharyngeal hematomas.
All patients with penetrating neck trauma require hospital admission and observation for at least 24 hours in a facility capable of definitive surgical care. Patients with suspected airway or vascular injury should be admitted to the intensive care unit. Asymptomatic patients with negative evaluations may be discharged after observation, while those with wounds superficial to the platysma may be discharged directly from the emergency department. Common pitfalls include failure to anticipate a difficult airway and failure to recognize impending airway compromise, both of which can lead to rapid deterioration if not addressed promptly.
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