Practice Quiz

Phlebotomy Technician

Category - Procedures & Tubes

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Phil the New Phlebotomy Tech successfully completed his first draw. The order was for a PT and PTT. Phil had the right patient, the right test, the right tube, and the right time. He collected the sample in a light blue top tube- he filled the tube to the middle and gently rotated the tube 5-10 times, to mix the sample with the additive. What (if anything) did Phil do wrong?
  1. Phil is correct.
  2. Phil chose the wrong color top for the test.
  3. Phil did not fill the tube completely.
  4. Phil did not rotate the tube enough- the sample will clot.
Explanation
Answer: C - Phil forgot that a sample collected in a light blue top tube must completely fill the tube. Light blue top tubes contain the additive sodium citrate, in either 3.2% or 3.8% solution
(determined by laboratory policy); since the mixing ratio is nine parts blood to one part citrate, most clinical laboratories will reject light blue top tubes that are not completely filled.
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