Assessment
EMT Scene Size-Up Steps Before Patient Contact
Scene size-up begins before patient contact and continues as conditions change. Its purpose is to keep responders, patients, and bystanders from becoming part of a larger emergency while gathering the information needed to plan a safe approach.
Key points
- Pause long enough to identify hazards before entering.
- Use PPE appropriate to the anticipated exposure.
- Identify the mechanism of injury or nature of illness.
- Confirm the number of patients and request resources early.
- Reassess safety whenever the scene changes.
Start with safety, not the patient
It is natural to focus immediately on the visible patient, but an unsafe approach can create additional victims and delay care. Look for traffic, unstable structures, environmental exposure, hazardous substances, weapons, aggressive people or animals, and rescue hazards.
If the scene is unsafe and cannot be made safe quickly within your role, remain at a safe location and request the specialized resources needed to control it.
The core scene size-up components
These observations work together. A mechanism may reveal hazards, the number of patients may change resource needs, and new information may require a different approach route.
- Personal protection: select PPE based on anticipated contact and exposure.
- Scene safety: identify current and potential hazards, including changes in traffic, weather, crowds, or behavior.
- Mechanism or nature: determine what happened or what type of medical complaint brought EMS to the scene.
- Patient count: identify whether this is a single-patient call or an incident requiring triage and additional units.
- Resources: request fire, law enforcement, rescue, animal control, additional ambulances, or other support before the need becomes critical.
- Approach plan: decide where to enter, where equipment should be staged, and how the patient can be removed.
Scene safety is dynamic
A scene that was safe on arrival may not remain safe. Traffic can begin moving, smoke can increase, a crowd can become agitated, or an animal can enter the approach path. Continue scanning even after patient contact.
Good scene management also protects the exit route. Avoid placing equipment where it can be struck, contaminated, or block patient movement.
Common study mistakes
- Treating scene size-up as words to say rather than observations to make.
- Approaching the patient before a visible hazard is controlled.
- Waiting too long to request resources.
- Forgetting to update the plan when conditions change.
- Allowing equipment placement to interfere with the safe approach or exit.
Sources
Clinical and examination information was checked against the following authoritative references.
Put the concept into practice