6 Questions
What is carryover or cross-contamination in the context of blood collection?
The contamination of additive tubes with previous blood samples, affecting test results
Which additive in tubes has been identified as the source of more carryover problems than any other additive?
EDTA
Why does heparin cause the least interference in tests other than coagulation tests?
Because it occurs naturally in blood
What strategy eliminates confusion and presents a sequence of blood collection that results in the least amount of interference from carryover?
Order of draw
How can the chance of carryover be minimized during blood collection?
By making certain that specimen tubes fill from the bottom up and preventing contact with the back end of the needle within the tube holder
According to CLSI, what may contaminate specimens for trace element tests?
Additives in blood collection tubes
Learn about carryover and cross-contamination in blood collection, the transfer of additives between tubes, and the impact on test results. Understand the key point of EDTA in tubes to prevent contamination.
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