Which of the following statements is true regarding nitrous oxide effects on patients?

Nitrous oxide is known for its relatively minimal cardiovascular effects, making it a popular choice in various clinical settings, especially in dentistry and for sedation purposes. The use of nitrous oxide can lead to a mild increase in heart rate or blood pressure in some patients, but these changes are generally minor compared to other sedation agents. Its ability to maintain cardiovascular stability is a key reason why nitrous oxide is often preferred for patients with cardiovascular concerns or those requiring sedation for procedures.

In contrast, other statements are not accurate reflections of nitrous oxide's effects. While it can cause mild respiratory changes, particularly in some patients with pre-existing respiratory conditions, it does not universally cause respiratory depression across all patients. Moreover, nitrous oxide does not guarantee complete pain relief; it helps reduce discomfort and anxiety, but patients may still experience varying levels of pain. Lastly, nitrous oxide is administered through inhalation, not intravenously, which makes it convenient and reduces the need for invasive procedures. These characteristics underscore its selective use in sedation and pain management protocols.