Management of Zone III Missile Injuries Involving the Carotid Artery and Cranial Nerves

Case report: Selective operative management of zone 3 carotid artery transection

INTRODUCTION

Penetrating carotid artery injury is rare and particularly uncommon in zone 3 of the vessel. Due to anatomical challenges to open operative management in zone 3, there are minimal treatment recommendations for this highly morbid condition. The urgency associated with understanding proper management of this traumatic injury is further supported by the nearly 100 % rate of fatality in untreated penetrating carotid artery injuries.

PRESENTATION OF CASE

A 17-year-old male presented with a bullet wound to the right temple. He was intubated for airway protection given left-sided tracheal deviation secondary to a right neck hematoma. His Glasgow Coma Scale (GCS) was 11 on initial presentation, E3V2M6. The patient remained hemodynamically stable and underwent a CT angiogram of the head and neck. Imaging revealed a complete transection of the cervical (zone III) right internal carotid artery (RICA), a large pseudoaneurysm of the RICA distal to carotid bifurcation, and comminuted mandibular fracture. Collateral blood flow was preserved to the right hemisphere. Multi-disciplinary discussions deemed risks of operative intervention outweighed the benefits in the immediate peri-trauma period as the increased risk of hemispheric stroke, exsanguination, and death was thought to be prohibitive. Therefore, treatment of delayed intervascular stenting of the RICA was performed as opposed to emergent open RICA ligation or repair.

DISCUSSION

Treatment decisions for zone 3 CAI rely on the patient's hemodynamic stability, with surgical ligation favored for immediate hemorrhage control in unstable cases, while stable patients may undergo observation or delayed endovascular intervention. Balancing the need for hemostasis to prevent further blood loss with the potential benefits of anticoagulation to maintain cerebral perfusion underscores the decision-making required in managing such cases.

CONCLUSION

The rarity and challenge of ICA injury at this anatomical location presents unique challenges. Our description of observation and delayed revascularization outlines the precarious, yet validated, treatment method for hemodynamically stable patients.

Current opinion in otolaryngology: update on vascular injuries in craniomaxillofacial fractures

PURPOSE OF REVIEW

The primary purpose of this chapter is to define current recommendations for vascular work-up of patients with craniomaxillofacial (CMF) trauma with emphasis on imaging to include intraoperative fluorescence, angiography, and surgical exploration. The second goal is to review current management recommendations for observation versus surgical exploration based on the neck zones of injury.

RECENT FINDINGS

Over the past two decades, endovascular techniques are increasingly utilized, particularly in zones I and III of the neck. Additionally, modern advances in radiographic technology have allowed for selective exploration of penetrating zone II injuries. A high suspicion for blunt cerebrovascular injury should be maintained for patients with high-speed deceleration mechanisms of injury, with a majority of patients managed with medical therapy or conservative monitoring over surgical intervention.

SUMMARY

CMF fractures are associated with vascular injuries to the intracranial carotid system, extracranial carotid system, or vertebral artery system. A thorough understanding of at risk patients, optimal work-up, and timely treatment algorithms is imperative given the devastating sequellae of stroke and death.

Role of ENT Surgeon in Managing Battle Trauma During Deployment

With technological improvements in body armour and increasing use of improvised explosive devices, it is the injuries to head, face and neck are the cause for maximum fatalities as military personnel are surviving wounds that would have otherwise been fatal. The priorities of battlefield surgical treatment are to save life, eyesight and limbs and then to give the best functional and aesthetic outcome for other wounds. Modern day battlefields pose unique demands on the deployed surgical teams and management of head and neck wounds demands multispecialty approach. Optimal result will depend on teamwork of head and neck trauma management team, which should also include otolaryngologist. Data collected by various deployed HFN surgical teams is studied and quoted in the article to give factual figures. Otorhinolaryngology becomes a crucial sub-speciality in the care of the injured and military otorhinolaryngologists need to be trained and deployed accordingly. The otolaryngologist's clinical knowledge base and surgical domain allows the ENT surgeon to uniquely contribute in response to mass casualty incident. Military planners need to recognize the felt need and respond by deploying teams of specialist head and neck surgeons which should also include otorhinolaryngologists.