How should an acute electrical injury be managed?

Management of Electric Shock

The immediate priority in managing electric shock is ensuring scene safety by turning off the power source before approaching the victim, followed by rapid assessment for cardiac arrest requiring CPR and defibrillation, with all victims requiring medical evaluation regardless of apparent injury severity. 1

Scene Safety - Critical First Step

Never touch a victim while power is still on - this is the most fundamental rule that supersedes all other interventions 1, 2:

• Low-voltage (household): Turn off power at the circuit breaker or fuse box
• High-voltage (power lines): Immediately call 911 or fire department - do NOT approach the victim or attempt wire removal with any object, even wooden ones, as all materials conduct electricity at sufficiently high voltage 1
• Wait for trained utility personnel to confirm power is off before entering the scene

Immediate Assessment and Resuscitation

Once the scene is safe, assess for life-threatening conditions immediately 3, 4:

Cardiac Arrest Management

• Cardiopulmonary arrest is the primary cause of immediate death from electrocution 1
• Expect ventricular fibrillation, asystole, or ventricular tachycardia 1
• Apply standard BLS/ACLS protocols without modification - begin high-quality CPR and prepare for defibrillation 3, 4
• Consider prolonged resuscitation efforts - case reports document survival with good neurologic outcomes after up to 70 minutes of CPR for electrical injuries 3
• Respiratory arrest may persist even after cardiac rhythm returns due to respiratory center injury or muscle paralysis - continue ventilatory support 4

Spinal Precautions

• Manually stabilize the head and neck to minimize movement if trauma is suspected (falls, being thrown) 1
• Approximately 15% of electrical injury victims sustain traumatic injuries from falls or being thrown 5
• Do NOT use immobilization devices unless specifically trained - they may cause harm 1

Secondary Assessment

Burn Evaluation

• Thermal burns occur at entry/exit points and along internal pathways 1
• Surface burns do NOT correlate with internal injury severity - extensive internal damage can exist with minimal skin findings 6, 5
• Cool thermal burns with cold tap water (15-25°C) until pain relieved - do NOT apply ice directly 1
• Cover burns loosely with sterile dressing; leave blisters intact 1

Cardiac Monitoring

• All victims require ECG monitoring - arrhythmias can be delayed 4, 7
• Normal ECG within 1 hour post-injury correlates with low risk of severe complications 7
• ECG abnormalities correlate with tetany and palpitations 7

Rhabdomyolysis Screening

• Check for myoglobin in urine (tea-colored urine) 4, 5
• Creatine kinase ≥253 IU/L predicts severe injury 7
• Aggressive fluid resuscitation required if myoglobinuria present - target urine output 1 mL/kg/h 8, 5
• Consider mannitol and urine alkalinization to prevent acute renal failure 8, 5

Mandatory Medical Evaluation

All victims of electric shock require medical assessment, even with minimal apparent injury 1, 2:

• Internal injuries may not be immediately apparent 1
• Delayed complications can occur up to 2 years post-injury 5
• Long-term sequelae include pain, neurological symptoms, cognitive impairment, and psychological disorders 9, 7

Common Pitfalls to Avoid

1. Assuming minimal external injury means minimal internal damage - voltage traverses deep tissues causing hidden injury 6, 5
2. Using standard burn resuscitation formulas - these underestimate fluid needs in high-voltage injuries due to deep tissue damage 8, 5
3. Premature discharge of asymptomatic patients - complications can be delayed 9, 7
4. Attempting rescue while power is on - this creates additional victims 1, 2
5. Applying ice directly to burns - causes tissue ischemia 1

Disposition

• Admit for monitoring: Any cardiac symptoms, abnormal ECG, high-voltage exposure, significant burns, or elevated creatine kinase
• Multidisciplinary burn center management recommended for complex injuries 10
• Follow-up required even for apparently minor injuries - 43.9% develop aesthetic sequelae, 25.3% psychological disorders 7