Which of the following are part of the safety mechanism of the nitrous oxide delivery system.  Choose all that apply.

Which injection deposits anesthetic just superior to the mandibular foramen?

Which of the following are routes of delivery of dental local anesthetic drugs?  Choose all that apply.

.  What is the percentage of N2O a patient receives when effect is felt at 4 liters of oxygen and 2 liters of N2O?

A _________________ aspiration can occur when a bevel is in contact with a vessel wall.  This is why some highly vascular areas require two aspirations.

For which injection is the deposition site at the interdental bone?

Which of the following is not a potential symptom of chronic N2O abuse?

Which of the following oxygen blood saturation values would be considered normal for a healthy individual?

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

Persons with significant liver disease are at an increased risk of reactions to local anesthetic because: