This is a very narrow use case. Theranos was trying to be an all purpose replacement for blood sample. The problem with Theranos is that a pin prick sample is t

This is a very narrow use case. Theranos was trying to be an all purpose replacement for blood sample. The problem with Theranos is that a pin prick sample is too small to account for the heterogeneity in blood for many use cases. Only a larger draw gives you a large enough sample. It should be fairly simple to determine how much heterogeneity is present for this use case. With Sequoia behind this I'd be pretty confident that they consulted the necessary experts.