Which of the following would be an acceptable sample?

a. CBC collected in a green top
b. Coagulation tests on a hemolyzed sample
c. CBC drawn on a nonfasting patient
d. CBC drawn above an intravenous access site

ANS: C
Fasting is not required to obtain a valid specimen for a CBC. Heparin is not the appropriate anticoagulant agent for a CBC. Coagulation tests should not be performed on a hemolyzed sample. The fluid in the intravenous line will contaminate a CBC drawn above an intravenous line, and all blood cell counts will be diluted and thus invalidly decreased.