During nitrous oxide/oxygen sedation, what must the dental nurse ensure?

• A. Equipment is functioning and calibrated.
• B. Ignore vitals if the patient looks comfortable.
• C. Administer the gas at maximum concentration.
• D. Discontinue documentation.

Answer: (A)

Ensuring the delivery system is functioning and calibrated is essential because it directly safeguards the patient and the team by guaranteeing accurate and safe gas delivery. A quick pre-use check confirms that the gas cylinders, regulators, and flow meters are delivering the intended nitrous oxide and oxygen mix, and that the scavenging system is removing excess gas to protect staff. When the equipment is validated, the clinician can titrate the dose correctly, maintain adequate oxygenation, and respond promptly if any alarm or pressure issue arises. This is far safer than relying on appearance to judge sedation depth, which can be misleading; never push the gas to maximum concentration, as that risks oversedation or hypoxia; and ongoing documentation is a standard part of safe practice, not something to discontinue.