DAANCE Anesthesia Equipment and Delivery 5

Question 1

Which action should be taken FIRST if a patient's reservoir bag becomes fully deflated during nitrous oxide administration?

Accepted Answer

Increase total gas flow rate

Answer

A deflated reservoir bag indicates the gas flow rate is insufficient to meet the patient's ventilatory demand; increasing total flow restores the bag volume.

Question 2

In a central piped gas supply system, what color are the nitrous oxide pipeline connections (DISS fittings) in the United States?

Accepted Answer

Blue

Answer

DISS (Diameter Index Safety System) fittings for nitrous oxide pipelines are blue, matching the cylinder color code, to prevent misconnection with oxygen (green).

Question 3

What does the term 'titration' mean in the context of nitrous oxide/oxygen sedation delivery?

Accepted Answer

Gradually increasing the concentration until the desired sedation level is achieved

Answer

Titration means incrementally increasing the nitrous oxide concentration in small steps while monitoring patient response to achieve the optimal sedation level safely.

Question 4

After completing a nitrous oxide sedation procedure, what is the recommended minimum duration for administering 100% oxygen before dismissing the patient?

Accepted Answer

3–5 minutes

Answer

A minimum of 3–5 minutes of 100% oxygen is recommended post-procedure to prevent diffusion hypoxia caused by rapid outgassing of nitrous oxide from the bloodstream.

Question 5

Which equipment item is used to measure the percentage of oxygen in a gas mixture delivered by a dental anesthesia machine?

Accepted Answer

Oxygen analyzer

Answer

An oxygen analyzer directly measures the fraction of oxygen in the gas mixture at the machine outlet to verify safe concentration before delivery.

DAANCE - Dental Anesthesia Assistant National Certification Examination Practice Test

DAANCE - Dental Anesthesia Assistant National Certification Examination Practice Test

DAANCE Anesthesia Equipment and Delivery 5