Which one of the following statements about croup is true?
A) The classic presentation of croup is the onset of a "seal bark" at night.
B) The child with croup mostly has wheezing while he is active or playing during the day.
C) Croup is a bacterial infection that causes swelling of the epiglottis.
D) It is not an emergency, although first-time parents can become very alarmed by it.
A
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An artery is a blood vessel that only:
A) carries blood away from the heart. B) carries deoxygenated blood. C) returns blood to the heart. D) carries oxygenated blood.
Which valve device is similar to a wye, but has an inlet and outlet of matching size combined with smaller outlets that take water from the main line?
A. Hydrant valve B. Siamese appliance C. Water thief appliance D. Large-diameter hose appliance
Which of the following will decrease oxygen's affinity for hemoglobin?
a. Increased CO2 c. Methemoglobin b. Acute alkalosis d. Hypothermia
Contrast medium can be any of the following except:
A) barium sulfate. B) a gas. C) water. D) iodine.