Specimen Problems

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Last updated 6:54 AM on 8/4/26
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5 Terms

1
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Hemolysis

Red blood cells break apart; caused by shaking the tube, using a small needle, forcing blood, or not letting alcohol dry.

2
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Hemoconcentration

Blood becomes too concentrated; caused by leaving the tourniquet on too long or repeated fist pumping.

3
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Short draw

Tube is underfilled, causing the wrong blood-to-additive ratio.

4
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EDTA carryover

EDTA contaminates the next tube; may cause falsely high potassium and falsely low calcium.

5
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Specimen contamination

Caused by the wrong order of draw, touching the cleaned site, drawing near an IV, or using the wrong tube.