what are the three main methods of artificial ventilation?
Answers
Answer:
The early ventilators were negative-pressure ventilators. Negative pressure ventilation is very little in use now.
Iron lung: The first mechanical ventilator, a metal cylinder which enveloped the patient completely up to the neck.
Chest cuirass: A small shell which can be strapped to the patient’s chest to create the negative pressure.
Positive-pressure ventilation
Positive-pressure ventilators were developed in the early 1950s to treat polio patients with respiratory paralysis. These ventilators blow the air into the patient’s lungs through a tube. They may be invasive or noninvasive.
Invasive ventilation
Endotracheal intubation: the tube is inserted into the patient’s airway (trachea) through the mouth or nose.
Tracheostomy: the tube is inserted through a hole made into the airway.
Noninvasive ventilation
Noninvasive mechanical ventilators come with masks and can be used at home. The three kinds are
Continuous positive airway pressure (CPAP): delivers constant and steady air pressure.
Autotitrating (adjustable) positive airway pressure (APAP): changes air pressure according to the breathing pattern.
Bilevel positive airway pressure (BiPAP): delivers air with different pressures for inhalation and exhalation.