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In medicine, some blood tests are conducted on venous blood obtained by fingerstick (or fingerprick) (or, for neonates, by an analogous heelprick). The site, free of surface arterial flow, where the blood is to be collected is sterilized with a topical germicide, and the skin pierced with a sterile lancet.[citation needed] After a droplet[vague] has formed, venous blood is captured in a capillary tube (usually relying on surface tension).[citation needed]

Tests commonly conducted on the capillary blood collected are:

Fingersticks are routine for hardy[citation needed] adults, but are generally performed on children and the elderly only if a small amount of blood (less than 500 μg) suffices for needed tests. Neonates are given heelpricks instead, as this is less likely to cause permanent damage.


  1. ^ Ansell, J.; Holden, A.; Knapic, N. (November 1989). "Patient Self-Management of Oral Anticoagulation Guided by Capillary (Fingerstick) Whole Blood Prothrombin Time". Arch Intern Med (American Medical Association) 149 (11): 2509–2511. doi:10.1001/archinte.1989.00390110085018. 

External links[edit]

  • Heelpricks, section "Blood collection on babies"