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Capillary sample
Phenylketonuria test
Phenylketonuria test
 
Overview   Risks   Results   

Capillary sample

Alternative names:

blood sample - capillary; fingerstick; heelstick

What the risks are:

  • excessive bleeding
  • fainting or feeling lightheaded
  • hematoma (blood accumulating under the skin)
  • infection (a slight risk any time the skin is broken)
  • multiple punctures to locate veins

Special considerations:

Blood tests are most commonly performed on blood from a vein (venipuncture). The results of capillary testing may be very accurate for some tests, but for other tests they may be less accurate.


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