You are providing care to an adult who is unresponsive and not breathing as a result of drowning. You give your first ventilation before performing CPR and notice that the chest does not rise. Which of the following should you do next?

A. Change the position of the mask and then look for chest movement.
B. Blow into the mask more forcefully and then look for the chest to rise.
C. Re-tilt the victim's head and then attempt another ventilation.
D. Give 5 back blows and then check the victim's mouth.

If the chest doesn't rise after the first ventilation on an unresponsive and not breathing adult who drowned, the next step is to re-tilt the victim's head and attempt another ventilation. Ensure a proper airtight seal and continue ventilation attempts.

Explanation:

When giving the first ventilation to an unresponsive and not breathing adult who drowned, if the chest does not rise, the next step is to re-tilt the victim's head and attempt another ventilation. Tilt the head back slightly and lift the chin to open the airway. Ensure that the victim's mouth is sealed around the mask or mouth-to-mouth contact point to create an airtight seal. Continue with the ventilation attempts until the chest rises.

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