Fingerstick

Uncommon card · No. 144150

In medicine, some blood tests are conducted on capillary blood obtained by fingerstick (or fingerprick). 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, capillary blood is captured in a capillary tube (usually relying on surface tension) or on a membrane. In very young children, blood may be taken by an analogous neonatal heel prick on the heel of the foot.

Read on Wikipedia · Image Alden Chadwick from Leeds, UK, CC BY 2.0