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The page below is a sample from the LabCE course Pre-analytical Challenges Encountered with Capillary Blood Collection and Testing. Access the complete course and earn ASCLS P.A.C.E.-approved continuing education credits by subscribing online.

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Typical Sites for Capillary Blood Collection

The typical puncture site can be the finger or heel (for infant patients). The earlobe, which was used as a puncture site in the past, has been determined not to be the most optimal site, due to inadequate blood flow when compared to the finger or the heel and should be avoided. The only reason for using the earlobe as a collection site is only if there is no other site available.