At what angle should the head be positioned during rescue breaths?

The proper positioning of the head during rescue breaths is crucial for ensuring that the airway is effectively opened. When the head is slightly tilted back, it helps to align the airway in a straight line, allowing air to flow more freely into the lungs. This angle is critical because it reduces the risk of airway obstruction caused by the tongue or other anatomical structures.

The other options are less effective for this purpose. Positioning the head flat against the back does not facilitate the opening of the airway, which is necessary for adequate ventilation. A fully upright position could potentially compress the chest and restrict airflow, making it difficult to deliver effective breaths. Turning the head to the side is not beneficial for rescue breaths, as it could obstruct the airway, increasing the risk of ineffective ventilation and potential choking. Thus, the slight tilt back is the recommended technique to ensure a clear and open airway for rescue breaths.