tongueThe
The most common cause of airway occlusion (airway obstruction) is choking on foreign objects. This means swallowing an obstructive object or having something lodged in your trachea causing the airway to lose its patency.
A child's airway differs from that of an adult in that the child's tongue is proportionately larger in the oropharynx compered to that of an adult. Also, a child's airway is smaller and softer and more prone to foreign body obstruction. An infant's airway is smaller and softer still and the trachea is usually about the diameter of a pencil.
an adult is over 18 old, an infant is under 2 years
The average diameter of the adult windpipe (or trachea) is 2.5cm (1 inch).
After the compressions, look in the mouth and if you see the object, sweep it out. If not, attempt to ventilate again; if breaths don't go in, repeat: compressions, look, sweep if object seen, and attempt to ventilate.
Use the head tilt chin lift procedure to open the airway. See slide 13 of the related link for a picture.
The ring of cricoid cartilage
Common uses of continuous positive airway pressure include sleep apnea, respiratory distress syndrome in infants, and adult respiratory distress syndrome.
upside down and turned 180 degrees over the tongue
On average, there are approximately 1500 miles of airways in an adult human.
compressions and ventilations ata constant rate for two minutes