<i>&quot;...There aren&#x27;t any real benefits to a &quot;finger prick&quot; other than marketing spin...</i>&quot;<p><i>&quot;...regular draws but used the best trained phlebotomists who can find the vein on the first stick...&quot;</i><p><i>That&#x27;s</i> the advantage of a finger prick.  You don&#x27;t need to be a trained phlebotomist to do it.  The microfluidics drove the idea that you only needed &quot;a few drops&quot; to perform the tests (since drawing 100mL out of a finger would take forever).  Put those two together and you had the concept of a test that any semi-skilled person could perform in a drugstore.  That was the hook Theranos was banking on.