Which statement is true concerning thermal flowmeters?
a. Gas flow can be measured bidirectionally.
b. Gas velocity affects the amount of cool-ing.
c. Cooling increases the resistance of a heated wire.
d. Cooling decreases the resistance of a thermistor bead.
ANS: B
Gas flow is calculated by the amount of power needed to maintain the temperature of the heating element. A high gas velocity will cool the heating element, requiring more power to maintain the temperature of the thermistor.
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Which of the following is the term that describes fractured bones grating or rubbing together?
A) Deformity B) Popping C) Crepitus D) Exposed bones
Your patient is a 12-year-old boy who was struck in the right temporal area of the head with a baseball. He had a brief loss of consciousness and is alert on your arrival. You note that he is becoming drowsy and has a strong radial pulse of 60, a blood pressure of 140/70, and a respiratory rate of 12. Which of the following best describes this patient's condition?
A) He is stable, and he most likely has a subarachnoid hemorrhage with no increase in intracranial pressure. B) He is critical, and he most likely has an epidural hematoma with rapidly increasing intracranial pressure. C) He is stable, and he most likely has a mild diffuse axonal injury with no increase in intracranial pressure. D) He is serious, and he most likely has a subdural hematoma with an increase in intracranial pressure.