What is the first step in the BLS sequence?

In the BLS (Basic Life Support) sequence, the first step is to assess the scene for safety. This is crucial because ensuring the safety of both the rescuer and the victim is paramount before providing any assistance. By evaluating the environment, a rescuer can identify potential hazards that could pose a risk during the resuscitation efforts, such as traffic, fire, or electrical hazards. Once the scene is deemed safe, the rescuer can proceed with further actions, such as checking for responsiveness or calling for emergency assistance.

The other steps in the BLS sequence, including calling for emergency help, checking for breathing, and beginning chest compressions, all rely on having a secure environment in which to perform these potentially life-saving measures. If the scene is not safe, performing these steps could endanger the rescuer or the victim, which underscores the necessity of making safety the first priority.