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Phlebotomy Certification Practice Test
Quality & Professional Issues
Phlebotomy Certification
Quality & Professional Issues
Practice Test
Question 1 of 3
91% Get this Question Right
Why do quality control procedures prohibit the use of outdated evacuated tubes?
A
specimens collected may yield incorrect results
B
the tubes may not fill completely
C
all of these are true
D
additives that prevent clotting may no longer work
The additives and vacuum integrity for evacuated tubes is guaranteed by the manufacturer but only if the tube is used before the expiration date. After the expiration date, the tube is outdated and the additives may break down and no longer work and the vacuum may be compromised resulting in incomplete filling. Both of these situations would cause collected specimens to yield incorrect or erroneous results.
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