The page below is a sample from the MediaLab course, Phlebotomy
Learn about Compliance & CE courses available for clinical laboratories
and individual medical technologists
- Insufficient blood volume (short draws) within a collection tube containing anticoagulant will result in an incorrect ratio of blood to anticoagulant, and yield incorrect test results.
- Short draws can be caused by:
- A vein collapsing during phlebotomy.
- The needle coming out of the vein before the collection tube is full.
- Loss of collection tube vacuum before the tube is full. (Always keep extra tubes on hand.)