There already exists what we call POC (Point of Care) testing. Think glucometers for checking blood sugars. And a device called an iStat can (in a hospital environment) run a couple dozen commonly ordered tests at the bedside. For example, in my former job in a Peds ICU- we used iStats extensively for blood gas monitoring, lactate, electrolytes, hemoglobin/ hematocrit - common things any critically ill child would need tested for frequently. These devices used a cartridge that took about 0.3mL of blood- and could be obtained by a finger or heel prick (you of course cleaned the skin with alcohol first!). ALL of these tests can be performed on whole blood (in other words- they did not need to be spun in a centrifuge and have components separated). To your clotting queston- there is an anticoagulant embedded in the testing cartridge of the iStat- it keeps the blood from clotting while the test is being run. Processing time is 1-2 minutes. So Theranos/ Holmes was claiming thousands of really sophisticated multi-step tests requiring component testing (serum/ plasma) could somehow magically be done on just a couple drops of blood. And to your previous post- I vote psychopath / liar.