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Fingerstick
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
. After a droplet has formed,
venous blood
is captured in a
capillary tube
(usually relying on
surface tension
).
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