The reason for taking larger samples on many tests using "normal" methods is not that the instruments are not sensitive but that one needs to draw enough blood

The reason for taking larger samples on many tests using "normal" methods is not that the instruments are not sensitive but that one needs to draw enough blood to get a representative sample of what's actually inside your body. A little prick of blood that comes out is often not such a representative sample. I always wondered how Theranos was going to get around this fact of life. Now as things unfold it increasingly sounds like they can't... they just wanted us to think they could.