Rescue breathing types
Mouth-to-mouth Airway is opened by the head-tilt/jaw-lift maneuver, nose is pinched by R1 who takes 2 deep breaths, seals his/her lips around R2's mouth and gives 2 full breaths–1 to 1.5 seconds/breath, allows good chest expansion, average volume 800 mL
Mouth-to-nose Used when there is major trauma to the face, trismus, or a tight mouth seal cannot be formed; airway is opened by the head-tilt/jaw-lift maneuver, mouth is closed by R1 who takes 2 deep breaths, seals his/her lips around R2's nose and gives 2 full breaths as above
Mouth-to-stoma Used in Pts who have undergone laryngectomy; R1 who takes 2 deep breaths, seals his/her lips around R2's stoma and breathes as above