There were some fundamental issues with some of what Theranos was claiming to do. Mainly when detecting substances in blood with very low concentrations using v

There were some fundamental issues with some of what Theranos was claiming to do. Mainly when detecting substances in blood with very low concentrations using very small volumes, especially when the blood is taken from the finger. In those cases even if you could pick apart every atom in the sample perfectly you still would not be able to do what Theranos was claiming to do, because the substances would either not be in the sample or there would be so few molecules that the uncertainty in the real concentration would be too large. real-time monitoring is a dream which in principle does not suffer the same fundamental issues, but does require much larger jumps in technology compared to current means of running tests.