What is the best test to perform if a patient's PTT does not rise after the typical heparin dose?
a. Immunoassay for anticardiolipin antibody
b. Lipoprotein(a) assay
c. Chromogenic antithrombin
d. Mixing studies
ANS: C
When a patient has a deficiency of antithrombin, heparin may be administered in therapeutic or even higher dosages, but it will not exert an anticoagulant effect in vivo, nor will it be detected by the PTT. This is called heparin resistance.
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Which of the following BEST describes a design limitation of structural fire fighting personal protective equipment (PPE)?
A. Keeps coat sleeves from riding up B. Provides protection from hot water C. Prevents heat transfer away from body D. Covers all portions of skin when moving
You have been summoned to a residence for a child who ingested a liquid pesticide. On scene, the worried parents inform you that their 4-year-old son and some friends were playing in the garage and apparently found some pesticide, which their son says he tasted. Assessment indicates that he is alert, oriented, and crying and has some white powder around his mouth. After performing the initial assessment and finding no life-threatening conditions, it is imperative that the EMT make which question or statement:
A) "Do you think this was an intentional act?" B) "I need to see the other children." C) "Are all of his shots up-to-date?" D) "These chemicals need to be put out of reach."
Where is messenger RNA formed?
a. Mitochondria b. Golgi organelle c. Ribosomes d. Nucleus
Continued exposure to radiation over prolonged periods may result in each of the following except one. Which one is the exception?
A) May alter the ability of genetic cells to reproduce normally. B) May affect the ability of genetic cells to repair damage. C) May produce offspring with increased resistance to radiation exposure. D) May result in cumulative chromosome damage.