The Problem of Tunnel Vision in EMS
Tunnel vision in EMS refers to the narrowing of attention to a single task, patient finding, or injury while losing awareness of the broader clinical picture and scene environment. During high-stress calls, your sympathetic nervous system activates, causing physiological changes that literally narrow your field of vision and focus your attention on perceived threats. While this response helped our ancestors survive, it can be harmful in clinical settings where comprehensive assessment is critical.
When Tunnel Vision Occurs
Tunnel vision is most likely during:
- Cardiac arrest resuscitations where providers focus on CPR quality but miss scene hazards
- Major trauma where a dramatic injury (such as an open fracture) captures all attention while internal bleeding goes unrecognized
- Pediatric emergencies where emotional intensity narrows focus
- Multiple casualty incidents where providers become fixated on one patient
- Procedures like intubation attempts where the provider loses track of time and overall patient status
Recognizing Tunnel Vision in Yourself
Warning signs include: losing track of time, not hearing your partner's verbal cues, forgetting to reassess vital signs, becoming unaware of bystanders or scene changes, and an inability to recall details of the scene later. If you find yourself surprised by information your partner provides ("When did the patient's SpO2 drop to 82%?"), you may have been experiencing tunnel vision.
Prevention Strategies
Practice controlled breathing during high-stress calls. Take one deep breath before approaching the patient. This brief pause activates your parasympathetic nervous system and helps counteract the tunnel vision response. Use the "10 for 10" technique: invest 10 seconds to survey the entire scene and patient before starting hands-on care.
Assign roles during multi-provider responses. When one provider is performing a procedure, another should be monitoring the patient's overall status and maintaining scene awareness. Build periodic "step-back" moments into your resuscitation practice: every few minutes, physically step back, scan the entire scene and patient, and reassess your priorities.
After calls where you suspect tunnel vision occurred, debrief with your crew. Identify what captured your attention, what you missed, and how you can build better habits for maintaining broad awareness during future high-stress responses.