If there is a condition that makes it difficult for you to breathe or has enough oxygen in your blood, you may need to use a mechanical ventilator. This condition is called respiratory failure. A mechanical ventilator is a machine that moves air in and out of the lungs. There are many kinds of ventilators in medical field, it divided into non-invasive ventilator and invasive ventilators. We are mainly talk invasive ventilators here. Invasive ventilators are adopted by hospital to rescue patients.There are many types of this kind of ventilators.Such as basic ventilator, ventilator with air compressor, ventilators for adult, ventilator for pediatric and neonatal. Some anesthesia machine has ventilator inside too, if some hospitals without enough ventilators in special condition,they can use anesthesaia machine ventilator function instead too.Your respiratory therapist and doctor set up a ventilator to control how often it pushes air into your lungs and how much air you breathe. You might