In which situation would you perform mouth-to-mouth ventilation?

Performing mouth-to-mouth ventilation is indicated during CPR when you encounter a non-breathing and unresponsive adult. In this scenario, the individual is in need of immediate oxygenation due to their inability to breathe on their own, making it essential to provide ventilations to prevent brain damage from hypoxia. During CPR, when checking for breathing, if the victim is unresponsive and not breathing adequately, mouth-to-mouth is a crucial component of delivering rescue breaths to facilitate oxygen delivery to the lungs and, consequently, to vital organs.

In the other scenarios, the need for mouth-to-mouth ventilation does not arise. If a person is unconscious but still breathing, their airway may be at risk, but ventilation isn't needed. Instead, safeguarding the airway and monitoring their breathing is the priority. In cases where a person requests assistance with their breathing, they are still able to ventilate on their own and might require other forms of assistance or positioning rather than mouth-to-mouth. When someone is responsive but has a weak pulse, the focus would typically be on providing care to support circulation rather than delivering respiratory support through mouth-to-mouth, especially if they are still breathing.