In a first aid scenario involving a worker injured by a circular saw, what should you do first upon arriving at the scene?

Ensuring the scene is safe and taking standard precautions is the critical first step in any first aid scenario. Before rendering aid to an injured person, it's essential to assess the environment for any ongoing hazards that could pose a risk to both the rescuer and the victim. In the case of a worker injured by a circular saw, there could be dangerous machinery still operating, or other hazards present at the scene.

By prioritizing safety, you protect yourself from potential injury and allow yourself to assist the victim effectively. Once you've established that the scene is safe, you can then proceed to check for the injured person's condition and take further necessary actions, such as calling for emergency services or performing CPR if warranted. This foundational step is crucial to ensure that help can be provided without putting additional lives at risk.