CNOR Nursing MCQ 5

Question 1

Malignant hyperthermia (MH) is triggered by which anesthetic agents? Select the combination the perioperative nurse should recognize.

Accepted Answer

Succinylcholine and volatile inhalational agents

Answer

Malignant hyperthermia is triggered by succinylcholine (a depolarizing neuromuscular blocker) and volatile inhalational anesthetic agents such as halothane, sevoflurane, and desflurane.

Question 2

When a patient develops suspected MH intraoperatively, what is the PRIORITY nursing action?

Accepted Answer

Administer 100% oxygen and notify the attending anesthesiologist

Answer

The priority action is to notify anesthesia and provide 100% oxygen; dantrolene is then administered immediately, but it requires a physician order.

Question 3

Which preoperative skin antiseptic agent is CONTRAINDICATED near the eyes and ears?

Accepted Answer

Chlorhexidine gluconate (CHG)

Answer

Chlorhexidine gluconate is ototoxic and can cause corneal damage, making it contraindicated for skin preparation near the eyes and ears.

Question 4

During a thyroidectomy, the surgeon requests a nerve integrity monitor (NIM) endotracheal tube. The perioperative nurse understands this device is used to monitor which structure?

Accepted Answer

Recurrent laryngeal nerve

Answer

The NIM tube detects electromyographic signals from the vocalis muscle to monitor recurrent laryngeal nerve integrity during thyroid and parathyroid surgery.

Question 5

A patient receiving spinal anesthesia suddenly develops hypotension, bradycardia, and nausea. The perioperative nurse should recognize these as signs of:

Accepted Answer

High spinal block affecting sympathetic fibers

Answer

A high or total spinal block causes widespread sympathetic blockade resulting in hypotension, bradycardia, and nausea due to loss of vascular tone.

CNOR - Certification Exam Practice Test

CNOR - Certification Exam Practice Test

CNOR Nursing MCQ 5