D. Skirt float correct answers A - The flow of gases delivered from the

NBCRNA Question of the Day with complete solutions Which rotameter flow indicator is read in the middle of the device?

• Ball float
• Bobbin
• H float
• Skirt float correct answers A - The flow of gases delivered from the

anesthesia machine is commonly shown by 5 types of rotameter indicators. Properly understanding their function is necessary for safe and proper use, as with all anesthesia equipment. Except ball floats, all rotameter flow indicators should be read at the upper rim. Ball floats should be read in the middle of the indicator.If the recurrent laryngeal nerves are damaged bilaterally during surgery, which respiratory manifestations will the patients MOST likely present with in the PACU? (Select 2)

• Aphonia
• Expiratory wheezing
• Hoarseness
• Stridor correct answers A & D- Unilateral damage to the recurrent

laryngeal nerve (RLN) manifests as hoarseness. Bilateral RLN damage presents symptoms such as aphonia, stridor, and respiratory distress.When administering succinylcholine (Anectine) to a patient with a lower motor injury, what would be the expected motor response?

• No response
• Reduced response
• Normal response
• Exaggerated response correct answers D- When a patient sustains a

lower motor neuron injury, there is often an increase in the number of nicotinic acetylcholine receptors in the neuromuscular junction. This would lead to an exaggerated response to succinylcholine. 1 / 2

What is an absolute contraindication for supraglottic airway?

• Increased gastric emptying
• Intestinal obstruction
• Morbid Obesity
• Reactive Airway Disease correct answers B- Contraindications

would include conditions promoting gastric content aspiration. Elective

supraglottic airway contraindications: full stomach, hiatal hernia with

significant gastroesophageal reflux, intestinal obstruction, delayed gastric emptying, poor history, poor lung compliance, high airway resistance, glottic or subglottic airway obstruction, and limited mouth opening (<1.5 cm).How is methemoglobinemia caused by the administration of Prilocaine (Citanest) best treated?

• Albumin 5%
• Fresh frozen plasma
• Methylene blue
• Selective beta-blockade correct answers C- Hepatic metabolism of

prilocaine generates o-toluidine, which oxidizes hemoglobin to methemoglobin. Methemoglobinemia, if severe can be treated with IV administration of methylene blue.Hypoxic guard systems will prevent hypoxic mixtures in which circumstance?

• Administration of a third gas such as helium
• Defective mechanics or pneumatics
• Incorrect gas in oxygen cylinder or pipeline
• Leaks upstream of the flow control valves correct answers D-

Hypoxic guard systems can allow hypoxic mixtures under certain

conditions: administration of an inert gas (helium), leaks downstream of

the flow control valves, incorrect gas in the cylinder or the pipeline, or defects in the pneumatics or the mechanics of the machine.

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