Download - Neck Trauma
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Neck Trauma
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Objectives At the conclusion of this presentation the
participant will be able to:• Examine the spectrum of neck trauma, the
mechanisms of injury and associated injury patterns • Define the three zones of the neck used as
classifications of injury• Identify the appropriate diagnostic modalities used to
evaluate patients with neck trauma • Explain the therapeutic interventions in the
management of neck trauma• Identify nursing interventions important in caring for patients with neck trauma
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Epidemiology
• 3500 deaths per year• Mortality rate 2-6%• Blunt mechanism accounts for 5%• Penetrating trauma accounts for most• Zone I injuries are the most lethal
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Epidemiology
• Commonly injured vessels • Internal jugular vein• Internal carotid artery
• Laryngeal and tracheal more common than pharyngeal and esophageal injuries
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Blunt Mechanism of Injury
• Steering wheel• Assault• Strangulation/Hanging• “Clothes line” injuries• Other (sports,
industrial, etc.)
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Penetrating Mechanism of Injury
• Missile injury (bullet, knife, or other)
• Stabbing or lacerations
• Impalement• Animal bites
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Anatomical Review Fascia
Deep cervical fasciaSuperficial fascia
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Structures at Risk
Musculoskeletal• Vertebral bodies• Cervical muscles
and tendons• Clavicles, 1st and
2nd ribs• Hyoid bone
Glandular • Thyroid• Parathyroid• Submandibular • Parotid glands
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Anatomical Review
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Structures at Risk
Visceral structures• Thoracic duct• Esophagus• Pharynx• Larynx • Trachea
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Structures at Risk
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Structures at Risk
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Zones of the Neck
• Zone III - Clavicles and sternal notch to cricoid cartilage
• Zone II – Cricoid cartilage to the angle of mandible
• Zone I – Angle of mandible to base of skull
IIIII
I
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Zones of the Neck
Zone I
Zone II
Zone III
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Zone I
• Subclavian vessels• Brachiocephalic veins• Common carotid
arteries• Aortic arch• Jugular veins• Esophagus• Lung apices• C- spine/cord• Cranial nerve roots
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Zone II
• Carotid and vertebral arteries
• Jugular veins• Pharynx• Larynx• Trachea• Esophagus• C-spine/cord
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Zone III
• Salivary and parotid glands
• Esophagus• Trachea• Vertebral bodies• Carotid arteries• Jugular veins• Cranial Nerves IX-XII
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History and Physical
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History and Physical
• Gun • Caliper, distance
• Knife• Length, angle
• Amount of blood loss• Baseline mental status• Baseline motor status• Drug or alcohol use
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Key Findings
Hard signs• Airway obstruction• Pulsatile bleeding• Expanding
hematoma• Unresponsive to
resuscitation• Extensive
subcutaneous emphysema
Soft signs • Voice change• Wide mediastinum• Hemoptysis• Hematemesis• Dysphonia/dysphagia
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Management - Primary Survey
• ABCs• Ensure airway is patent• Ensure patient is adequately
oxygenating• Control any obvious hemorrhaging• IV access
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Airway Considerations
Who requires immediate intubation?• Apneic • Comatose• Respiratory compromise• Expanding neck hematoma• Massive subcutaneous emphysema • Massive bleeding in airway
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Airway Considerations
• “Wait and See”• Avoid excessive bag-valve-mask• Exercise caution with paralytics and
sedation• Surgical airway last resort• Cricothyrotomy vs. tracheostomy
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Control Bleeding
• Local pressure only• No tourniquets• No pressure dressings• No probing or blind
clamp placement
http://chestofbooks.com
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Physical Exam
• Violation of the platysma muscle
• CNS exam• Obvious hematoma,
bleeding
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Physical exam
• Contusions, lacerations, abrasions to the neck, etc.
• Expanding hematomas, obvious bleeding
• Hoarseness, stridor, • Subcutaneous emphysema• Hemoptysis, drooling• Dyspnea• Distortion of the normal
anatomic landmarks• Mandibular/midface
instability
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Diagnostic Studies
• Chest radiograph• CT and CT
angiogram• Laryngeal injury• Tracheal injury• Vessels• Blunt esophageal
injury
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Diagnostic Studies
CT Scan• Can aid in identifying weapon trajectory and
structures at risk• Should only be used in stable patients• Gracias et al (2001) found that use of CT scan in
stable patients • Saved patients from arteriogram indicated by older
protocols 50% of the time• Avoided esophagoscopy in 90% of patients who
might otherwise have undergone it
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Diagnostic Studies
• Laryngoscopy • Bronchoscopy• Esophagoscopy;
esophagram• Rigid vs. flexible
esophagoscopy• Color flow doppler,
duplex ultrasonography• MRA
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Diagnostic Studies
Arteriogram• Gold standard• Invasive• Complications• Availability varies• Expensive• Contrast load• Simultaneous
intervention
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Specific Injuries
• Vascular • Aerodigestive• Cranial nerves• Thoracic duct
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Vascular Injuries in the Neck
Physical Exam• External marks• Decreased LOC• Hemiparesis• Hematoma• Hypotension • Dyspnea • Thrill, bruit, pulse not
present
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Associated Injuries
• Le Fort II or III fractures• Basilar skull fracture
involving the carotid canal• Diffuse Axonal Injury with
GCS < 6• Cervical vertebral body
fracture• Near hanging with anoxic
brain injury• Seatbelt abrasion of anterior
neck with significant swelling/altered mental status
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Primary Diagnostics
• CT angiogram of the neck
• Chest x-ray indicated in Zone I injuries because of their proximity to the chest
• Complete blood count, basic metabolic panel, toxicology and blood alcohol content
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Primary Diagnostics
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Vascular Injury Management
• Common carotid: repair preferred over ligation in almost all cases
• Internal carotid: Shunting is usually necessary
• Vertebral: Angiographic embolization or proximal ligation can be used if the contralateral vertebral artery is intact
• Internal Jugular: Repair vs. ligation
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Carotid Intimal Flap
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Carotid Artery Interposition Repair
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Management Summary
Vascular Injury• Surgical exploration unstable and stable
Zone II • Angiography for Zone I and III• Selective, nonoperative management stable
Zone II• Embolization high carotid or vertebral artery• Endovascular stent (pseudoaneurysms)• Anticoagulation blunt carotid/vertebral artery
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Aerodigestive Injuries
• Airway structures • Trachea• Larynx• Thyroid cartilage
• Esophagus• If diagnosis < 24 hours • Poor outcome if diagnosed > 24 hours
• Pharyngeal
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Tracheal and Laryngeal Injuries
Signs of injury• Hoarseness and
dysphonia • Hemoptysis • Subcutaneous
emphysema in the neck and trunk
• Tenderness over the trachea
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Primary Diagnostics
Laryngotracheal Injury• Plain x-rays
• Soft tissue emphysema• Airway compression• Fracture of laryngeal
cartilages• CT scan
• 3D reconstruction • Endoscopy
• Flexible vs. rigid• Bronchoscopy/laryngoscopy
Teeth
Cervical Spine
SubQ air
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Management
Laryngotracheal Injury• Secure the airway• Early repair• Laryngeal fractures
• Thyroid fracture most common
• Delay of reduction makes it more difficult and return of normal function unlikely
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Esophageal Injury
Penetrating• Sharp weapon (knife)• High speed projectile
(bullet)• Iatrogenic laceration • Lumen outward
injury
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Esophageal Injury
Blunt•Barotrauma•Blast injuries•Crush injuries•Blow to the neck
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Esophageal Injury
Signs of Injury • Hematemesis• Odynophagia• Dysphagia• Drooling, hypersalivation• Tracheal deviation • Sucking neck wound• Subcutaneous emphysema• Pain with turning neck
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Esophageal Injury Diagnostics
Radiographic Findings• Plain films
• Air in soft tissue planes
• Pneumomediastinum• Leakage of fluid into
right pleural space • Contrast swallow
• Extravasation is diagnostic
• CT scan
Laboratory Findings• Markers of
inflammatory response• Leukocytosis with
left shift• Low oxygen
saturations• Acidosis on ABG
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Esophageal Injury Diagnostics
Helical CT • Expedites diagnosis• Trajectory of missile• Associated injuries
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Diagnostics Esophageal Injuries
Normal Thoracic Leak
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Esophageal Injury
Management Summary• Initial assessment complex• Goal is to minimize the bacterial
contamination and enzyme erosion• Gastric decompression• Antibiotic coverage• Drainage of wound• Surgical repair
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Pharyngeal/Oral Injury
Similar presentation as esophageal injury
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Practice Guidelines
• Few published practice guidelines for the management of neck injuries
• Eastern Association for the Surgery of Trauma (EAST) • Penetrating neck injuries only• Blunt cerebrovascular injury
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EAST Guidelines Key Points
• Selective operative management vs. mandatory exploration
• CT Angiography and duplex ultrasound can be used to identify Zone II arterial injuries
• Plain CT of the neck can be used to rule out a significant vascular injury
• Contrast esophagography or esophagoscopy can be used to evaluate for perforation.
• Serial physical examination is 95% sensitive for detecting arterial and aerodigestive tract injuries that need repair
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EAST Guidelines Summarized
• Selective management is common now in asymptomatic patients;
• CT angiography is a very good tool to rule out vascular injuries
• The role of physical exam, esophagography, and esophogoscopy remains controversial
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Do all patients have to lay flat?
• Position patient in manner that is most comfortable
• Patients with anterior neck trauma may want to lean forward or sit upright
• Patients with copious secretions can be rolled on their side
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Possible Complications
• Loss of airway• Swallowing problems with aspiration • Stroke in unrecognized vascular
injuries • Soft tissue necrotizing infections,
including mediastinitis due to delayed diagnosis of esophageal injuries
• Air embolism• Pneumothorax, tension pneumothorax
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Nursing Considerations
Be alert for:• Mental status changes and motor deficits• Changes in airway patency• Onset of stridor, drooling• Difficulty laying supine• Other injuries that are highly associated
with cerebral vascular injuries
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Nursing Assessment
• Frequent neurologic and motor checks• Frequent assessment for expanding
hematomas in the neck• Careful history documentation• Reassurance• Adequate pain assessment• Anxiety reduction
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Summary
• Penetrating and blunt neck trauma occurs in 5-10% of patients with serious injuries
• Maintenance of an adequate airway is paramount to survival
• Maintain a healthy respect for initially benign appearing injuries
• Unrecognized vascular or aerodigestive injuries have a high mortality