Vacuum blood tubes come in all of the following sizes, EXCEPT ________.

You cannot obtain a reading on the pulse oximeter after applying the sensor to the patient's finger. Which one of the following would be the most likely reason for this?

A) The patient's pulse is faster than 100 beats per minute. B) The patient's hands are cold. C) The patient is hypertensive. D) The patient's oxygen saturation is below 90%.

Which of the following types of fire doors are available with ratings of 3 hours to 20 minutes and are commonly used in stairwell enclosures?

A. Swinging B. Rolling steel C. Horizontal sliding D. Horizontal folding