There are two main types of ventilators: invasive and non-invasive. Invasive ventilation involves delivering oxygen through an endotracheal or tracheostomy tube, while non-invasive ventilation delivers oxygen without intubation, such as through CPAP or BiPAP. A ventilator is a medical device that provides mechanical ventilation by moving breathable air in and out of the lungs. There are several modes of ventilation including CMV, SIMV, and spontaneous modes, which differ in how breaths are delivered and parameters that can be adjusted. Ventilators are used when a patient is physically unable to breathe or is breathing insufficiently, as indicated by factors like low GCS, abnormal blood gases, labs, or cardiac