Which of the following is a common method to deliver medical gases?

Nasal cannulas and face masks are among the most common methods used to deliver medical gases, especially oxygen. These devices are designed to provide a continuous flow of gas directly to the patient's respiratory system, ensuring efficient oxygenation. A nasal cannula consists of a lightweight tube with two prongs that fit into the nostrils, allowing the patient to breathe in oxygen while still being able to talk and move comfortably. Face masks, on the other hand, cover the nose and mouth, providing a higher concentration of oxygen, making them ideal for patients requiring more intensive oxygen therapy.

The use of nasal cannulas and face masks is advantageous because they can be easily adjusted to deliver varying levels of oxygen depending on the patient's specific needs. They are also versatile for different clinical scenarios, from emergency situations to long-term respiratory support. Their design allows for both variety in application and comfort for the patient during treatment.

Other delivery methods listed, like transdermal patches and inhalers, are used for different medications or conditions and are not typically associated with the delivery of medical gases in the same manner. Intravenous drips primarily deliver fluids and medications directly into the bloodstream rather than gases into the respiratory airway, which further distinguishes nasal cannulas and face masks as the correct