Exam 21: Fundamentals for the Administration of N2O-Oxygen Sedation

What is the percentage of N₂O a patient receives when 2 liters of N₂O are delivered per minute with a total flow rate of 6 liters per minute?

Excessive exposure to N₂O may occur as a result of leaks from the anesthetic delivery system during administration.

John Smith is a 64-year-old patient appointed for extraction of #14. He is very anxious but does not want to take any oral sedatives because he has to drive home after the procedure. He mentions that his son had N_{2,/sub>O-O2 sedation when his wisdom teeth were removed and he thinks he would like to try it. His health history is significant for heavy smoking over the last 40 years, advanced COPD, hypertension, and diabetes. He walks to the operatory slowly, breathing with great difficulty. -What medical condition(s) would contraindicate the use of N2O-O2 sedation?}

N₂O tanks maintain a constant pressure of approximately 1100 psi until all the liquid has evaporated, making residual volume difficult to determine.

Which is the correct initial percentage and time interval to begin N₂O-O₂ sedation?

At least one clinician must remain in a treatment room to monitor a patient during N₂O sedation, and at least one additional, appropriately trained professional should be nearby and within view.

Which of the following contraindicates the use of N₂O sedation?

Which of the following is not a result of N₂O-O₂ sedation?

The volume of each breath is known as the:

John Smith is a 64-year-old patient appointed for extraction of #14. He is very anxious but does not want to take any oral sedatives because he has to drive home after the procedure. He mentions that his son had N_{2,/sub>O-O2 sedation when his wisdom teeth were removed and he thinks he would like to try it. His health history is significant for heavy smoking over the last 40 years, advanced COPD, hypertension, and diabetes. He walks to the operatory slowly, breathing with great difficulty. -What is the most likely complication of N2O-O2 sedation for Mr. Smith?}

Which of the following conditions contraindicates the use of N₂O-O₂ sedation?

What would the gauge read on a half full cylinder of oxygen?

The incremental induction of N₂O should never exceed 5% per three minutes.

Which is the correct calculation to determine the percentage of oxygen delivered to a patient per minute?

In the United States oxygen is stored in blue cylinders, and it is odorless, colorless and tasteless.

Which of the following is not an indication for use of N₂O-O sedation in dentistry?

Which of the following should you do first when a patient at the 50% level of N₂O-O₂ sedation tells you they are not feeling much?

Breathing N₂O directly from pressurized tanks can cause frostbite to noses, lips, and intraoral tissues.

Pin index safety systems are used only for portable equipment.

Which of the following reduces gas pressures from the tanks before any gas is delivered into the tubing and pipes?