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1.
Blood drawn in EDTA
tubes (lavender top) must be thoroughly mixed (at least 10
times by inversion) prior to filling capillary tube;
capillaries must be filled at least ½ to ¾ full.
TRUE
FALSE
 
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2.
There are two types of
capillary tubes commercially available: Heparinized and Non-
heparinized. You must use the _____________ type for
fingerstick (capillary) samples.
Heparinized
(anticoagulated)
Non-Heparinized
(non-anticoagulated)
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3.
Non-heparinized
capillary tubes are only used when drawing
____________
capillary blood
because the heparin interferes with capillary blood
measurements
blood
in a purple top (EDTA)
venipuncture tube because it already contains anticoagulant
arterial blood
samples
hemolyzed blood
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4.
Acceptable storage for capillary tubes and clay sealer include
Refrigeration
Room temperature
Freezing
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5. Gross
hemolysis may result in a falsely low reading; therefore, it
is suggested the finger is not squeezed tightly when
collecting sample.
TRUE
FALSE
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6.
After centrifugation of
sample in capillary tube, the following layers will be
noticeable
red blood cells
leukocytes/ platelets
plasma
all of the above
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