DAANCE - Dental Anesthesia Assistant National Certification Examination Emergency Drugs and ACLS Questions and Answers 1

Question 1

A patient under sedation develops symptomatic bradycardia with a heart rate of 35 bpm and becomes hypotensive. According to ACLS guidelines, which medication should be administered first?

Accepted Answer

Atropine

Answer

According to the ACLS algorithm for bradycardia, atropine is the first-line drug for treating symptomatic bradycardia. It works by blocking the vagus nerve's effect on the heart, which typically increases the heart rate. Epinephrine is considered a second-line treatment if atropine is ineffective. Lidocaine is an antiarrhythmic for ventricular arrhythmias, and naloxone is for opioid reversal.

Question 2

A patient is having a severe allergic reaction (anaphylaxis) with bronchospasm and hypotension. What is the correct concentration of epinephrine for initial intramuscular administration?

Accepted Answer

1:1,000

Answer

The standard concentration of epinephrine for intramuscular (IM) injection to treat anaphylaxis is 1:1,000. The 1:10,000 concentration is typically reserved for intravenous (IV) administration during cardiac arrest. The other concentrations are too dilute for this purpose.

Question 3

Which of the following drugs is a specific reversal agent for the sedative and respiratory depressant effects of benzodiazepines like midazolam and diazepam?

Accepted Answer

Flumazenil

Answer

Flumazenil is a specific benzodiazepine receptor antagonist that competitively inhibits the activity at the benzodiazepine recognition site on the GABA/benzodiazepine receptor complex, thereby reversing the effects of benzodiazepines. Naloxone reverses opioids, atropine treats bradycardia, and amiodarone is an antiarrhythmic.

Question 4

During a procedure, a 68-year-old patient with a history of stable angina complains of sudden, crushing chest pain. The team has already administered oxygen. What is the most appropriate first-line medication to administer from the emergency kit?

Accepted Answer

Nitroglycerin

Answer

For acute anginal pain, sublingual nitroglycerin is the first-line and fastest-acting medication. It is a potent vasodilator that increases blood flow to the heart muscle, relieving ischemic pain. While aspirin is crucial in a suspected myocardial infarction, nitroglycerin provides the most immediate symptom relief for angina.

Question 5

A patient goes into cardiac arrest, and the monitor shows ventricular fibrillation. An initial shock has been delivered without success. According to the ACLS pulseless arrest algorithm, what is the first drug that should be administered?

Accepted Answer

Epinephrine

Answer

In the ACLS cardiac arrest algorithm for shockable rhythms like ventricular fibrillation (VF) or pulseless ventricular tachycardia (pVT), epinephrine is the first drug to be administered after the initial shock(s). It is given to increase vasoconstriction and improve coronary and cerebral perfusion during CPR. Amiodarone or lidocaine are antiarrhythmics considered after epinephrine if VF/pVT persists.

DAANCE - Dental Anesthesia Assistant National Certification Examination Practice Test

DAANCE - Dental Anesthesia Assistant National Certification Examination Practice Test

DAANCE - Dental Anesthesia Assistant National Certification Examination Emergency Drugs and ACLS Questions and Answers 1