Ventilator Basics: Key concepts

A ventilator is a medical device used to support or replace a person's breathing when they are unable to do so effectively on their own. Ventilators deliver a mixture of oxygen and air to the patient's lungs, either through a tube inserted into the windpipe or through a mask placed over the nose...

• In normal breathing, inspiration involves creating negative pressure within the chest to draw air in. Positive pressure ventilation, conversely, forces air into the lungs using positive pressure, requiring a mechanical ventilator. Ventilation, distinct from oxygenation, refers to the exchange of carbon dioxide in the lungs and the assistance provided to both inspiration and expiration.