RDA Assisting with Administration of Anesthesia and Sedation 4

Question 1

During nitrous oxide sedation, a patient suddenly becomes excited and uncooperative. What is the most likely cause?

Accepted Answer

The nitrous oxide concentration is too high

Answer

Excessive nitrous oxide concentration can cause paradoxical excitement, dysphoria, or uncooperative behavior in some patients.

Question 2

Which intraoral injection technique deposits anesthetic near the mental foramen to anesthetize mandibular premolars?

Accepted Answer

Mental nerve block

Answer

The mental nerve block targets the mental foramen, providing anesthesia to the mandibular premolars, anterior teeth, and adjacent soft tissue.

Question 3

A patient's oxygen saturation (SpO2) drops to 91% during moderate sedation. What is the first action the dental team should take?

Accepted Answer

Increase the oxygen flow rate

Answer

A drop in SpO2 should first be addressed by increasing supplemental oxygen delivery before escalating to more advanced interventions.

Question 4

Which of the following best describes the term 'vasoconstrictor' as used in local anesthetic solutions?

Accepted Answer

An agent that prolongs anesthetic duration and reduces systemic absorption

Answer

Vasoconstrictors such as epinephrine constrict blood vessels at the injection site, prolonging anesthetic effect and slowing systemic absorption.

Question 5

When assisting with IV sedation, the RDA notices the patient's IV site is swollen and the skin feels cool and tight. This most likely indicates:

Accepted Answer

Extravasation (infiltration)

Answer

Swelling, coolness, and tightness at an IV site are classic signs of extravasation, meaning the IV fluid has leaked into surrounding tissue.

(RDA) Registered Dental Assistant Practice Test