Definition: Ventilators, also known as ventilator units or ventilator machines, are medical devices that use mechanical ventilation to remove excess air from a patient's body. These machines help to improve the airflow in the lungs, which can be beneficial for patients with lung diseases such as pneumonia and chronic obstructive pulmonary disease (COPD). The process involves placing a mask over the nose and mouth of the patient, which helps to allow more air into their lungs. Ventilators also provide oxygen to the