What is a critical initial step when responding to an injured team member during a rescue?

In the context of rescue operations, the critical initial step when responding to an injured team member is to stop the operation and provide first aid. This action is paramount because the health and safety of the injured individual must take precedence over continuing the rescue effort. By halting the operation, rescuers can assess the condition of the injured team member and provide necessary medical interventions to stabilize their situation.

Additionally, providing first aid can prevent further harm and mitigate the risk of complications from the injury, which is essential in maintaining the safety of both the injured individual and the team. The focus on immediate care supports the principle that a rescuer's responsibility includes ensuring the welfare of their team, which is crucial in maintaining morale and effectiveness during a rescue. This step aligns with the protocols of prioritizing life-saving measures in an emergency response framework.