Anatomy & TerminologyQuestion 100 of 100
Which tube and test pairing is correct?
a.Lavender tube for a prothrombin time
b.Light blue tube for a complete blood count
c.Royal blue tube for trace element studies such as lead and zinc
d.Gray tube for a type and crossmatch
Explanation
Royal blue tubes are manufactured with low background metal contamination for trace element and toxicology testing. A CBC requires the lavender EDTA tube and a prothrombin time requires the light blue citrate tube, so those two pairings are reversed. Type and crossmatch is performed on a pink or red blood bank tube, never on a gray fluoride tube.
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