What is mechanical ventilation?

Mechanical ventilation refers to the use of a machine to assist or replace spontaneous breathing by moving air into and out of the lungs. This intervention is crucial for patients who are unable to breathe adequately on their own due to various medical conditions, such as respiratory failure, neuromuscular disorders, or during sedation for surgical procedures.

The mechanical ventilator provides positive pressure to deliver a controlled volume of air and ensures adequate gas exchange while also allowing the healthcare team to manipulate settings based on the individual needs of the patient, such as adjusting oxygen levels and ventilation rates. This aligns closely with the definition of mechanical ventilation as specified in the answer, as it highlights the role of the machine and the mechanism by which it operates to support respiratory function.

The other options describe different concepts related to respiratory care but do not accurately define mechanical ventilation. For instance, using a machine may be appropriate for delivering medications or enhancing oxygen delivery, but it specifically describes a medication delivery system or supplemental oxygen scenario rather than the broader function of ventilation. Similarly, manual techniques can assist with breathing but do not involve the mechanical process of ventilation, which relies on a machine to automatically control and regulate airflow.