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Blood differential



Basophil (Close-up)
Basophil (Close-up)
Formed elements of blood
Formed elements of blood


Blood differential

Alternative Names:

Differential; White blood cell differential count
What the risks are:
  • Excessive bleeding
  • Fainting or feeling light-headed
  • Hematoma (blood accumulating under the skin)
  • Infection (a slight risk any time the skin is broken)
  • Multiple punctures to locate veins

Special considerations:

Veins and arteries vary in size from one patient to another, and from one side of the body to the other. Obtaining a blood sample from some people may be more difficult than from others.




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