AORN Anesthesia Basics 3

Question 1

What is the mechanism of action of neuromuscular blocking agents (NMBAs) classified as non-depolarizing?

Accepted Answer

They competitively block acetylcholine at the neuromuscular junction without causing depolarization

Answer

Non-depolarizing NMBAs competitively antagonize acetylcholine at nicotinic receptors, preventing muscle contraction without causing initial fasciculations.

Question 2

The ASA Physical Status Classification System is used to:

Accepted Answer

Assess perioperative risk and communicate patient health status

Answer

The ASA-PS classification (I–VI) standardizes communication about a patient's physical health status and correlates with perioperative morbidity and mortality risk.

Question 3

Which of the following is the correct treatment for opioid-induced respiratory depression in the PACU?

Accepted Answer

Naloxone 0.04–0.4 mg IV titrated to effect

Answer

Naloxone, an opioid antagonist, is titrated in small doses IV to reverse respiratory depression while minimizing abrupt reversal of analgesia.

Question 4

Which nerve block provides anesthesia for the entire upper extremity below the shoulder?

Accepted Answer

Brachial plexus block

Answer

A brachial plexus block anesthetizes the C5–T1 nerve roots that supply the arm, forearm, and hand, making it ideal for upper extremity surgery.

Question 5

What is the significance of a 'cannot intubate, cannot oxygenate' (CICO) emergency?

Accepted Answer

It requires immediate cricothyrotomy as a rescue airway technique

Answer

A CICO emergency is life-threatening and mandates emergency front-of-neck airway access (cricothyrotomy) as the definitive rescue maneuver.

(AORN) Association of PeriOperative Registered Nurses Practice Test

(AORN) Association of PeriOperative Registered Nurses Practice Test

AORN Anesthesia Basics 3