By Red Heart Association / April 1, 2021 Mouth-to-Nose Ventilations If you are unable to create a complete seal around the patient’s mouth. Mouth-to-nose may be used. Ensure the patient’s head is tilted back and lift the chin upwards to close the mouth. Create a seal around the patient’s nose and breathe into the nose. Ensure the patient’s mouth is open between ventilations for the air to escape. Mouth-to-Mouth Ventilations Automated External Defibrillators Back to: Healthcare Providers Basic Life Support