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:

During minimal sedation, patients are able to independently and continually maintain airways; however they respond slowly to tactile stimulation and verbal commands.

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