Understanding Situational Awareness in EMS
Situational awareness (SA) is the ability to perceive what is happening around you, comprehend its meaning, and predict what is likely to happen next. In EMS, strong situational awareness helps you identify scene hazards, recognize deteriorating patients, anticipate equipment needs, and make better clinical decisions under pressure.
The Three Levels of Situational Awareness
Endsley's model of situational awareness describes three levels that build on each other:
- Level 1: Perception: Gathering information through your senses. What do you see, hear, smell, and feel? On an EMS scene, this means noticing environmental hazards, observing the patient's appearance, hearing abnormal breath sounds, and smelling unusual odors.
- Level 2: Comprehension: Understanding what the information means. A patient who is pale, diaphoretic, and tachycardic is not just exhibiting individual signs; these findings together suggest shock. Comprehension is where clinical knowledge transforms raw data into clinical meaning.
- Level 3: Projection: Predicting what will happen next based on your understanding. If this patient is in compensated shock, you should anticipate decompensation, prepare for aggressive fluid resuscitation, and plan for rapid transport to a trauma center.
Threats to Situational Awareness
Several factors degrade your situational awareness during emergency calls. Fatigue reduces your ability to perceive subtle cues. Task fixation (focusing entirely on one task like starting an IV while ignoring changes in the patient's condition) narrows your perception. Stress hormones impair comprehension and prediction. And complacency on routine calls causes you to miss important findings because you assume the outcome before completing your assessment.
Building Better Situational Awareness
Improve your SA with these practices:
- Perform a deliberate 360-degree scene survey before approaching the patient
- Verbalize your observations to your partner ("The room smells like gas" or "This patient's work of breathing is increasing")
- Set mental triggers for reassessment: after every intervention, after every 5 minutes, after any change in the patient's presentation
- Practice thinking one step ahead: "If this treatment does not work, what will I do next?"
- During debriefs, discuss what you noticed and what you missed, and identify patterns in your awareness gaps