What is the first step in the BLS assessment?

The first step in the Basic Life Support (BLS) assessment is to check for responsiveness. This involves assessing whether the individual is awake and able to respond to verbal or physical stimuli. The rationale behind this step is to determine the patient's level of consciousness and to establish if they require immediate medical attention. It is a crucial part of the assessment because if the person is unresponsive, it indicates a serious medical emergency that requires urgent action, including activating emergency response and providing necessary interventions.

Checking for responsiveness helps to quickly identify if the patient needs further assessment of their airway, breathing, or circulation, which are the subsequent steps in BLS. If they are responsive, the rescuer can then proceed with addressing any immediate concerns and ensuring the patient's safety. If they are unresponsive, it prompts the rescuer to ensure an open airway and to call for emergency help, making this initial assessment vital for determining the necessary actions that follow in a life-threatening situation.