RDA Assisting with Administration of Anesthesia and Sedation 5 — Questions and Answers
Question 1: What is the primary role of the RDA when the dentist is administering a local anesthetic injection?
- Withdraw the syringe if the patient moves
- Monitor the patient, retract tissue, and maintain a calm environment (Correct answer)
- Chart the injection technique selected by the dentist
- Prepare the reversal agent in case of overdose
Correct answer: Monitor the patient, retract tissue, and maintain a calm environment
The RDA supports the procedure by monitoring patient response, retracting tissue as needed, and helping maintain patient comfort and cooperation.
Question 2: A patient reports heart palpitations shortly after receiving a local anesthetic with epinephrine. The MOST likely explanation is:
- An allergic reaction to the amide anesthetic
- Intravascular injection of epinephrine (Correct answer)
- Methemoglobinemia from the local anesthetic
- Overdose of the sodium bisulfite preservative
Correct answer: Intravascular injection of epinephrine
Inadvertent intravascular injection of epinephrine causes rapid cardiovascular effects including palpitations, tachycardia, and elevated blood pressure.
Question 3: Which sedation level is characterized by a patient who responds purposefully to repeated or painful stimulation but cannot be easily aroused?
- Minimal sedation
- Moderate sedation
- Deep sedation (Correct answer)
- General anesthesia
Correct answer: Deep sedation
Deep sedation involves depressed consciousness where patients respond only to repeated or painful stimuli and may require airway support.
Question 4: Which topical anesthetic agent is most commonly used in dental offices prior to needle insertion?
- Lidocaine 2% with epinephrine
- Benzocaine 20% (Correct answer)
- Mepivacaine 3%
- Bupivacaine 0.5%
Correct answer: Benzocaine 20%
Benzocaine 20% gel is the most widely used topical anesthetic in dentistry for reducing discomfort prior to needle penetration.
Question 5: During enteral sedation monitoring, the RDA observes that the patient's respiratory rate has dropped to 6 breaths per minute. This finding requires:
- Documentation only, as this is within normal variation
- Stimulating the patient and immediately alerting the dentist (Correct answer)
- Administering supplemental oxygen and continuing the procedure
- Repositioning the patient to the Trendelenburg position
Correct answer: Stimulating the patient and immediately alerting the dentist
A respiratory rate of 6 breaths per minute indicates significant respiratory depression requiring immediate stimulation of the patient and dentist notification.
Question 6: Which anatomical landmark is used to guide the inferior alveolar nerve block (IANB) injection?
- The mental foramen
- The coronoid notch and pterygomandibular raphe (Correct answer)
- The incisive foramen
- The maxillary tuberosity
Correct answer: The coronoid notch and pterygomandibular raphe
The IANB uses the coronoid notch and pterygomandibular raphe as external landmarks to direct the needle toward the mandibular foramen.
Question 7: What does the acronym 'SAMPLE' stand for when taking a patient history prior to sedation?
- Symptoms, Allergies, Medications, Past history, Last oral intake, Events (Correct answer)
- Sedation, Anesthesia, Monitoring, Pulse, Liquids, Evaluation
- Signs, Analgesia, Medical history, Procedures, Labs, Emergencies
- Symptoms, Assessment, Medications, Patient age, Lifestyle, Exam
Correct answer: Symptoms, Allergies, Medications, Past history, Last oral intake, Events
SAMPLE (Symptoms, Allergies, Medications, Past medical history, Last oral intake, Events leading to visit) is a standardized history-taking tool used before sedation.
RDA Assisting with Administration of Anesthesia and Sedation 5
What is the primary role of the RDA when the dentist is administering a local anesthetic injection?