Invasive ventilation is a medical procedure used to assist or replace spontaneous breathing in patients who cannot breathe adequately on their own. This method involves placing a tube, called an endotracheal tube, into the patient's windpipe through the mouth or nose. The tube is connected to a ventilator, which delivers oxygen and removes carbon dioxide from the lungs. This technique is commonly used in critical care settings, such as intensive care units (ICUs), for patients with severe respiratory failure, trauma, or during major surgeries. Invasive ventilation helps maintain proper oxygen levels and supports the patient's overall respiratory function until they can breathe independently again.