A ventilator (Ventilator) is a medical device used to support or replace a patient's voluntary breathing.CMV, on the other hand, refers to a specific mode of ventilation. In CMV mode, the ventilator fully controls and regulates all parameters during each breath of the patient by providing preset parameters. This includes tidalvolume, respiratoryrate, delivered pressure to the lungs, and other relevant settings, among others. When using the CMV mode, the patient does not need to actively participate in or trigger each breathing maneuver. Ventilation is performed automatically by the ventilator at a fixed time interval, providing the required support according to preset parameters.