Which of the following is a correct example of pure medical gases?

The selection of the answer highlighting a variety of gases such as Oxygen (O₂), Nitrous Oxide (N₂O), Carbon Dioxide (CO₂), Helium (He), Nitric Oxide (NO), Medical Air, and Nitrogen (N₂) as pure medical gases is correct as it accurately reflects the classification of gases commonly used in medical settings. Pure medical gases are those that can be administered for therapeutic or diagnostic purposes without the presence of contaminants.

In the context of this question, each of the gases mentioned in the correct choice serves specific roles in medical practice:

• Oxygen (O₂) is essential for patient respiration.

• Nitrous Oxide (N₂O) is used as an anesthetic and analgesic agent.

• Carbon Dioxide (CO₂) is sometimes utilized in medical procedures, such as insufflation during laparoscopic surgery.

• Helium (He) is notable for its use in treating conditions like severe asthma due to its low density, aiding in easier airflow.

• Nitric Oxide (NO) is employed for its vasodilatory properties, particularly in pulmonary hypertension treatments.

• Medical Air is a blend that supports respiration when pure oxygen may not be necessary.

• Nitrogen (N