DAANCE Airway Management and Oxygen Therapy 3

Question 1

What is the maximum recommended oxygen flow rate for a nasal cannula before higher flow rates become ineffective and uncomfortable?

Accepted Answer

6 L/min

Answer

4 L/min

Answer

10 L/min

Answer

15 L/min

Question 2

In complete laryngospasm, positive-pressure bag-mask ventilation is ineffective primarily because:

Accepted Answer

The vocal cords are tightly adducted, blocking air entry

Answer

The patient is breathing too rapidly

Answer

The bronchioles are severely constricted

Answer

The patient's tidal volume is excessive

Question 3

Succinylcholine is the drug of choice for complete laryngospasm that does not resolve with positive-pressure oxygen because it:

Accepted Answer

Causes rapid neuromuscular blockade to relax laryngeal muscles

Answer

Dilates the bronchioles

Answer

Provides analgesia to reduce airway spasm

Answer

Stimulates respiratory drive

Question 4

Which monitoring device continuously and non-invasively measures arterial oxygen saturation during sedation?

Accepted Answer

Pulse oximeter

Answer

Capnograph

Answer

Electrocardiograph (ECG)

Answer

Sphygmomanometer

Question 5

End-tidal CO2 (EtCO2) monitoring is particularly valuable during sedation because it can detect:

Accepted Answer

Apnea or hypoventilation earlier than pulse oximetry

Answer

Blood pressure changes before the cuff inflates

Answer

Medication adverse reactions via ECG changes

Answer

Cardiac arrhythmias independent of heart rate

Question 6

If a patient becomes apneic during dental sedation, the FIRST action the dental anesthesia assistant should take is:

Accepted Answer

Attempt ventilation with a bag-valve-mask and 100% oxygen

Answer

Call 911 and wait for EMS

Answer

Administer epinephrine intramuscularly

Answer

Begin chest compressions immediately

Question 7

During dental sedation, the recommended patient chair position that best supports airway patency is:

Accepted Answer

Semi-reclined with the head slightly extended

Answer

Fully supine (flat)

Answer

Trendelenburg (head lower than feet)

Answer

Fully upright at 90 degrees