What is the first phase of the Patient Assessment System (PAS)?

The first phase of the Patient Assessment System (PAS) is the Scene Size Up. This initial step is crucial as it helps responders to ensure their own safety and the safety of others before providing care. During the Scene Size Up, responders assess the environment to identify hazards, determine the mechanism of injury, and evaluate the number of victims involved. This phase allows responders to quickly gather key information that will guide their subsequent actions and interventions.

Identifying hazards at the scene is essential to prevent additional injuries to both the patient and the rescuer. Ensuring the scene is safe is the priority before proceeding with patient assessment or providing any care. Additionally, this phase helps responders to implement necessary precautions such as calling for additional resources or specialized help if needed.

Following the Scene Size Up, responders then conduct the Primary Assessment, which involves evaluating the patient's airway, breathing, circulation, and any immediate life-threatening conditions. Understanding the sequence of these assessments is vital in providing effective emergency care.