Under ideal conditions, electrochemical oxygen (O2) analyzers have approximately what degree of accuracy?
a. 1%
b. 2%
c. 3%
d. 4%
ANS: B
There are two common types of electrochemical oxygen analyzers: (1) the polarographic (Clark) electrode and (2) the galvanic fuel cell. Under ideal conditions of temperature, pressure, and rela-tive humidity, both types are accurate to within ±2% of the actual concentration.
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How many times should a medical assistant check the label on an irrigating solution to make sure it has the right name, expiration date, and concentration?
a. Once b. Twice c. Three times d. This is not the role of the medical assistant.
A spontaneously breathing post-CVA patient has developed right lower lobe infiltrates on chest x-ray and has coarse breath sounds. When the respiratory therapist attempts to suction the patient by the nasotracheal route, she notes a gag reflex is present but the patient does not cough. Watery secretions are aspirated through the suction catheter. The therapist should
A. insert an oral endotracheal tube. B. reposition the patient to a sniffing position. C. change to a larger suction catheter. D. insert an oropharyngeal airway.