What is the appropriate evaluation and management of an anterior neck injury, including airway protection, imaging, antibiotics, and surgical intervention?

Anterior Neck Injury: Evaluation and Management

In hemodynamically stable patients with anterior neck injury, immediate airway assessment takes priority, followed by CT angiography (CTA) to guide selective management rather than mandatory surgical exploration, while unstable patients with hard signs require immediate operative intervention.

Initial Assessment and Airway Management

Immediate Airway Evaluation

The primary concern in anterior neck injury is airway compromise, which can deteriorate rapidly. Hard signs of injury mandate immediate action: active hemorrhage, expanding hematoma, air bubbling from the wound, massive hemoptysis/hematemesis, or airway compromise require urgent intervention 1, 2.

Airway Protection Strategy

When airway management is required in suspected cervical spine injury (which may coexist with anterior neck trauma):

• Use videolaryngoscopy as the preferred intubation technique (Grade A recommendation) to minimize cervical spine movement while securing the airway 1
• Employ jaw thrust rather than head tilt-chin lift for airway opening maneuvers to reduce cervical spine motion 1
• Remove the anterior portion of cervical collar during intubation attempts to facilitate visualization while maintaining manual in-line stabilization 1
• Consider adjuncts such as stylet or bougie when cervical spine is immobilized 1
• Prepare for emergency front-of-neck access (cricothyroidotomy) as penetrating neck trauma may distort anatomy and cause sudden deterioration 3

A recent case report demonstrated successful combined use of video laryngoscopy for primary airway control followed by fiberoptic bronchoscopy to confirm tube placement and exclude internal airway injury in penetrating neck trauma 3.

Hemodynamic Stratification

Unstable Patients

Patients with hemodynamic instability or hard signs require immediate operative exploration without preoperative imaging 1, 2, 4. Hard signs include:

• Active hemorrhage or pulsatile/expanding hematoma
• Bruit or thrill over the wound
• Unilateral pulse deficit
• Hemodynamic instability
• Airway compromise with stridor or air bubbling
• Massive hemoptysis or hematemesis 1, 2

Stable Patients

Hemodynamically stable patients without hard signs should undergo multidetector CT angiography (MDCTA) as first-line imaging 1, 2, 5, 6. This "no-zone" approach treats the neck as a single unit rather than using traditional anatomic zones, resulting in:

• Decreased unnecessary neck explorations 5
• Virtual elimination of negative explorations 5
• Sensitivity of 100% and specificity of 97.5% for detecting vascular and aerodigestive injury 1

Even 74% of patients with hard signs who are hemodynamically stable with stable airways can avoid surgical exploration based on CTA findings 1.

Imaging Protocol

MDCTA is the definitive first-line imaging modality for stable penetrating neck injuries 1, 2, 6, 4. The study should evaluate:

• Vascular structures (carotid and vertebral arteries, jugular veins)
• Aerodigestive tract (pharynx, esophagus, larynx, trachea)
• Neural structures
• Thyroid gland
• Trajectory of penetrating object 6

For patients with contrast allergy concerns, premedication per ACR recommendations should be considered 1.

Surgical Intervention

Indications for Immediate Exploration

• Hemodynamic instability
• Hard signs of vascular injury
• Hard signs of aerodigestive injury
• Expanding hematoma
• Active hemorrhage 2, 4

Selective Management Based on CTA

The selective approach based on clinical examination and CTA has resulted in minimal morbidity (10.7% complication rate) and mortality (3.0%) in civilian trauma centers 5. This represents superior outcomes compared to mandatory exploration 2.

Soft signs (non-expanding hematoma, venous oozing, dysphagia, dysphonia, subcutaneous emphysema) warrant imaging but not necessarily immediate surgery 1, 2.

Antibiotic Considerations

While the provided evidence does not specifically address antibiotic protocols for anterior neck injury, standard trauma principles apply: prophylactic antibiotics are indicated for penetrating trauma with potential contamination of deep structures, particularly when aerodigestive tract injury is suspected or confirmed.

Multidisciplinary Planning

Multidisciplinary planning and optimization of human factors should occur before airway management in complex neck injuries 1. This includes:

• Assembling appropriate surgical, anesthesia, and trauma teams
• Ensuring equipment availability (videolaryngoscope, fiberoptic bronchoscope, surgical airway kit)
• Cognitive aids and checklists for high-risk procedures 1

Key Pitfalls to Avoid

• Do not delay airway management in patients showing signs of respiratory compromise—deterioration can be sudden 3
• Do not perform mandatory exploration in stable patients without hard signs; CTA-guided selective management reduces unnecessary surgery 2, 5
• Do not use head tilt-chin lift if cervical spine injury is possible; use jaw thrust instead 1
• Do not assume external wound appearance predicts internal trajectory or severity of injury; imaging is essential 1, 4
• Do not forget to assess for delayed presentations of vascular or aerodigestive injury, which can occur hours after initial presentation 7