Part of could be that it is easier to fuck up a finger prick blood draw and cause inaccurate results. Improper cleaning [1], not getting the blood out in the r

Part of could be that it is easier to fuck up a finger prick blood draw and cause inaccurate results. Improper cleaning [1], not getting the blood out in the right way, or even certain patient conditions. Less likely to mess up (in a way that causes test inaccuracy) when you drain a whole vial out of their arm. [1] http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1238762/pdf/brjgenprac00036-0046a.pdf http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1238762/pdf/brjg...