After every 30 compressions, open the airway and give two rescue breaths. If you can give breaths, you will help the victim even more.
To give breaths you must first open the airway and ensure there are no obstructions. The tongue is the most common obstruction. If you see any foreign object and it can be removed easily, remove it.
Perform the head-tilt chin-lift motion: Tilt the head and pinch the nose with the same hand. With the other hand lift the chin – this will open up the airway.