What may cause vomiting during rescue breaths?

Vomiting during rescue breaths can occur for several reasons, and all the options provided contribute to this issue. When rescue breaths are administered, it's crucial to maintain proper technique to avoid complications.

Blowing in too forcefully can increase the pressure in the person's lungs and stomach. This excessive force may cause air to escape into the esophagus rather than the trachea, which can lead to the person feeling nauseous and possibly vomiting.

Blowing in for too long can also create a similar problem. If the breaths are delivered over an extended period, the recipient may ingest air into their stomach, which can trigger a vomiting response.

Blowing in too fast is another potential risk factor. Rapid breaths may introduce air too quickly, overwhelming the airway and again increasing the chance of air entering the stomach instead of the lungs.

Since any of these actions can contribute to causing vomiting, the correct choice encompasses all possibilities, demonstrating the importance of proper technique during rescue breaths to ensure effective and safe assistance.