the phlebotomist traveled to the home of 85 year old Mrs.Harrison to collect blood for PT, PTT, and potassium. Even though the blood collection was performed by using a winged infusion set on her fragile veins, the light blue top tube was undefiled. However, the phlebotomist was able to fill the SST tube. Which of the following will most likely occur?
A. the potassium will be falsely elevated
B. the PT and PTT will be falsely prolonged
C. the potassium will be falsely decreased
D. the PT and PTT will not be affected
Answer: B. the PT and PTT will be falsely prolonged
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