If you feel a thump against your fingers but do not see the chest rise or fall, what should you do?

In the scenario where you feel a thump against your fingers but do not observe any chest rise or fall, the situation likely indicates that the victim may not be breathing adequately or at all, despite a potential pulse being present. This lack of visible chest movement suggests that their airway might be obstructed or they are having a significant difficulty breathing.

Starting rescue breathing is critical in this context. Rescue breathing helps to provide oxygen to the victim's lungs when they are unable to do so on their own. It is essential to deliver breaths at a proper ratio and volume to ensure that the victim receives the necessary oxygen to support their body until further help can arrive or until they regain the ability to breathe.

Immediate provisions of rescue breaths can be life-saving and could prevent further deterioration of the victim's condition. Therefore, focusing on ensuring that the airflow reaches the lungs is the appropriate course of action in this situation.