What is the main difference between invasive and non-invasive ventilation?

The main distinction between invasive and non-invasive ventilation lies in the method of how air is delivered to the patient. Invasive ventilation involves the use of an artificial airway, typically through endotracheal intubation, which allows direct access to the trachea for the delivery of oxygen and positive pressure. This method is often employed in critical situations where the patient's airway might be compromised or when high levels of respiratory support are required.

On the other hand, non-invasive ventilation utilizes external devices such as masks or nasal cannulae to assist breathing without the need for intubation. It allows patients to maintain a more natural airway while still receiving the necessary respiratory support. Non-invasive techniques are often more comfortable for patients and can be used in various settings, including those that are not emergencies.

The other choices present misunderstandings about the implications of invasive and non-invasive ventilation. While invasive ventilation can be less comfortable and is often used in emergencies, these factors do not define the primary difference between the two methods. Additionally, the safety of each method can vary based on the clinical context and the patient's condition; it is not accurate to claim one is inherently safer than the other without considering these variables.