Which of the following can cause laryngeal spasm, leading to upper airway obstruction?

Why is it necessary for a clinical laboratory professional to develop a strong understanding of statistics?

A) To comprehend data published in research papers and prepare data for possible publication B) To determine whether laboratory equipment is functioning properly C) To understand manufacturer instructions for testing methods and laboratory equipment D) All of the above

A patient in respiratory distress is exhibiting pursed lip breathing. You realize that he is doing this to:

A) exhale increased amounts of CO2. B) inhale additional amounts of oxygen. C) keep the small airways open. D) prevent the loss of vapor with exhalation.