Hanging / Near-Hanging: Emergency Management

Pathophysiology (Key Points)

1. Venous congestion → unconsciousness → tightening of noose → arterial occlusion → cerebral hypoxia (the dominant killer)
2. Vagal reflex from carotid body pressure → fatal dysrhythmias
3. Sympathetic surge from pericarodid sinus pressure
4. Airway compression is less significant than commonly assumed
5. Cervical fracture/cord transection occurs mainly in judicial ("long drop") hangings, not typical suicidal hangings

Clinical Features in Survivors

Diagnostic Workup

Management

Airway

• Secure the airway early — hypoxic injury is the primary driver of morbidity
• Intubate in comatose or obtunded patients
• Assess for laryngotracheal injury (stridor, subcutaneous emphysema, hoarseness)

Hypoxic Brain Injury

• Induced mild hypothermia has been evaluated in comatose survivors — case series show ~43% survival to discharge when used after cardiac arrest from hanging
• Insufficient evidence to make a definitive recommendation, but current practice supports hypothermia protocols consistent with post-cardiac arrest care
• Thrombolysis for carotid injury-related stroke: case reports exist, but no confirmatory data — cannot be routinely recommended

Vascular Injury (Blunt Cerebrovascular Injury — BCVI)

Pulmonary Edema

• Managed with standard supportive care
• Mechanical ventilation with lung-protective strategies if severe

Disposition

• All near-hanging survivors warrant admission, ideally to the ICU
• Those in cardiac arrest or coma: ICU with hypothermia protocol
• CTA confirmed BCVI without surgical indication: admit for antithrombotic therapy and monitoring
• Repeat CTA at 7 days to confirm diagnosis; at 3 months to confirm resolution
• If no injury on day-7 CTA: antithrombotic therapy can be stopped
• Psychiatric evaluation is mandatory given suicidal mechanism

Key Takeaway

Definitive guidelines for near-hanging management are lacking. The cornerstone of treatment is early airway control, neuroprotection (hypothermia post-arrest), and echocardiographic/neuroimaging workup. Vascular injury is managed by the Biffl grading system with antithrombotic therapy as the mainstay.

Steroids in Near-Hanging

For Hypoxic Brain Injury — Not Recommended

• Induced mild hypothermia (post-arrest comatose patients)
• Supportive ICU care

For Laryngotracheal (LT) Injury — Role is Adjunctive

analgesia, humidified air, head elevation, steroids, antibiotics, antireflux medications, voice rest, clear diet

For Neurogenic/Post-Obstructive Pulmonary Edema

⚠️ One important caveat from Rosen's: in inhalation/burn-related laryngeal edema, steroids are specifically not recommended. This principle is worth bearing in mind when the mechanism involves thermal or chemical injury alongside hanging.

Bottom Line

Steroid Choice & Dosing for Laryngotracheal Edema in Near-Hanging

Drug of Choice: Dexamethasone

• High anti-inflammatory potency
• Negligible mineralocorticoid effects
• Long duration of action (~36–72 hours)
• Can be given IV, IM, or PO

Alternative: Methylprednisolone

Practical Approach in Near-Hanging

1. Acute presentation with airway edema/stridor:
   • Dexamethasone 10 mg IV stat, then 4–8 mg IV q6–8h
   • Combine with nebulized racemic epinephrine (2.25%, 0.5 mL in 2.5 mL NS) for immediate vasoconstriction
2. Stable patient with Grade 1–2 LT injury on conservative management:
   • Dexamethasone 8–10 mg IV/PO once or twice daily × 2–3 days
   • Taper as edema resolves
3. Before extubation (if intubated and concern for sub/supraglottic edema):
   • Methylprednisolone 40 mg IV OR Dexamethasone 4 mg IV q6h, starting 4–12 hours before planned extubation

⚠️ Steroids treat the inflammatory/edematous component of LT injury — they do not replace surgical management for Grades 3–5 injury, and have no role in the hypoxic brain injury component of hanging.