Capillary samples are a horrible way to collect and test blood.
For whole blood testing like CBC/D you almost always get microclots in the EDTA sample which causes platelet aggregation and that lowers counts for platelets and wbcs and in general causes wonky results for all the other parameters.
For plasma testing for Chem, Lipid, T, E2,.......and so on, you almost always get a sample that is so small with fribrin clots that it causes the analyzer to short sample an already insufficient sample volume. Analyzers these days use very small sample volume, but you need to have a full sized sample (3+mls) to make sure there was sufficient anticoagulant coming in contact with the blood to prevent plasma clotting.
Elizabeth Holmes the gal that thought she could revolutionize the world with micro sample testing, was clueless that this simply can't be done with any accuracy. There is no substitute for someone sticking a needle in a vein and drawing off 4 ml Edta, Heparin, and a clot top or non-additive tube, this way you have plenty of sample to work with, you can ream out the sample for clots and if the analyzer has abnormal results you can run repeat abnormal tests. The only types of routine capillary testing is usually done on newborns for heel sticks to check blood type for RH testing and direct antiglobulin, PKU, Total bilirubin testing to check for jaundice caused by elevated bilirubin, capillary blood gases.