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Which is not a characteristic on nitrous oxide? A. It reduces or eliminates anxiety B. It raises a patient’s pain threshold C. It is capable of producing profound surgical anesthesia D. It can reduce a patient’s gag reflex 2. Nitrous oxide is: A. Heavier than air B. The same weight as air C. Lighter than air D. Its weight cannot be differentiated from the other components of air 3. To obtain the same effect at the extreme altitudes (above 10,000 feet) the concentration of nitrous oxide must be: A. Reduced by 5% B. Reduced by 10% C. Increased by 5% D. Increased by 10% 4. An objective of nitrous oxide/oxygen administration is: A. Reduce or eliminate anxiety B. Enhance patient communication and cooperation C. Raise the patient’s pain threshold D. All of the above. 5. Nitrous oxide is not indicated for a: A. Fearful or anxious, yet cooperative patient B. A patient with a strong gag reflex C. A 12 month child that is not cooperating D. A mentally/physically disabled patient A dentalcare.com 6. Nitrous oxide may be administered to a patient: A. With a common cold B. With an asthmatic condition C. Taking bleomycin sulfate D. In the first trimester of pregnancy 7. While being administered nitrous oxide a tear rolls down the patient’s cheek. This is a sign to the dentist that: A. The patient is in the active alert consciousness stage B. The patient is in the altered state of consciousness stage C. The patient is entering the loss of consciousness stage D. The patient is still frightened of the dental procedure to be performed 8. During nitrous oxide administration the patient’s muscles take on a stiffened appearance. This is a sign to the dentist that: A. The patient is in the active alert consciousness stage B. The patient is in the altered state of consciousness stage C. The patient is entering the loss of consciousness stage D. The patient has recently undergone botox treatment 9. The ideal stage to render treatment to a patient receiving nitrous oxide is: A. Active alert consciousness B. Altered state of consciousness C. Loss of consciousness D. The second stage of anesthesia 10. Tidal volume is: A. The volume of gas that remains in the lungs after complete expiration B. The volume of gas inspired and expired with each normal breath C. The volume of gas breathed after heavy exercise D. The maximum volume of gas that can be inspired a dentalcare.com 11. Which category of patient has the largest tidal volume? A. Infant B. Child C. Adult D. They are all the same 12. Which category of patient has the greatest respiratory rate? A. Infant B. Child C. Adult D. They are all the same 13. A patient’s minute respiratory volume: A. Determines the concentration of nitrous oxide/oxygen administered to a patient B. Determines the amount of gas administered to a patient C. Is calculated by dividing the tidal volume by the patient’s respiratory rate D. Determines the smallest amount of gas needed to inflate the reservoir bag 14. Nitrous oxide should never be administered during the: A. The first trimester of pregnancy B. The second trimester of pregnancy C. The third trimester of pregnancy D. All three trimesters of pregnancy 15. Nitrous oxide is recommended for the following situations: A. A child exhibiting a temper tantrum B. A 14 month old presenting for extractions C. A child sobbing quietly, yet cooperating, prior to the extraction of an abscessed tooth D. All of the above. 16. Which is not a contraindication for nitrous oxide? A. Common cold dentalcare.com 16. Which is not a contraindication for nitrous oxide? A. Common cold B. Patients undergoing psychiatric treatment C. Emphysema D. Sickle cell anemia 17. The suggested guidelines for clinical monitoring of the patient receiving greater than a 50% nitrous oxide/oxygen concentration includes: A. Observation of the patient’s response to commands, musculo-skeletal changes, respiratory rate and behavior B. Use of a pulse oximeter C. Use of an EKG monitor D. A and B 18. The first step when administering nitrous oxide/oxygen to a patient is? A. Relax the patient by explaining the involved equipment and the sensations the patient may feel during the procedure B. Begin the flow of oxygen and adjust the nasal hood C. Place the nasal hood and begin the flow of oxygen D. Adjust the nasal hood and titrate the patient to the correct nitrous/oxide concentration 19. The correct order of steps when completing a nitrous oxide/oxygen administration to a patient is: A. Oxygenate the patient with 100% oxygen for 5 minutes, discontinue the oxygen flow from the delivery unit, remove the nasal hood B. Oxygenate the patient with 100% oxygen for 5 minutes, remove the nasal hood, discontinue the oxygen flow from the delivery unit C. Flush the reservoir bag with oxygen, oxygenate the patient for 5 minutes with 100% oxygen for 5 minutes, discontinue the oxygen flow from the delivery unit and remove the nasal hood D. Any of the above techniques is valid 20. Diffusion hypoxia can result in:
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