What is the most common problem faced by rescuers when using a rescue mask?

Maintaining a seal is the most common problem faced by rescuers when using a rescue mask. A proper seal is crucial for effective ventilation, as it ensures that the air delivered through the mask enters the victim's lungs rather than escaping into the environment. If the mask does not maintain a tight seal on the victim's face, it can lead to ineffective breaths and inadequate oxygenation.

In practice, several factors can contribute to difficulties in maintaining a seal, such as the victim’s facial structure, the presence of water or excess moisture, and the rescuer's positioning. Incorrect positioning of the mask or the victim can also hinder the seal, making it even more challenging to effectively deliver breaths.

While other issues, such as positioning the guest, administering chest compressions, and timing the breaths, are certainly relevant in a rescue scenario, they do not directly impact the mechanical effectiveness of the rescue mask like maintaining a proper seal does. Therefore, understanding and practicing how to achieve and maintain a good seal is essential for any rescuer using a rescue mask.