According to the WSJ article, a former Theranos employee has claimed that the commercial Theranos lab routinely diluted fingerstick blood samples and tested the

According to the WSJ article, a former Theranos employee has claimed that the commercial Theranos lab routinely diluted fingerstick blood samples and tested them using conventional machines from other manufacturers. If true, this raises two questions in my mind: 1. Were the non-Theranos machines approved for testing diluted blood samples? The technology may be approved only for blood samples with normal concentration. 2. Were the non-Theranos machines qualified to test blood samples collected by any method? Some researchers think that capillary blood collected with a fingerstick may be too contaminated to produce accurate results. In other words, was Theranos negligent with respect to federal regulations for use of these machines? Someone with clinical lab experience may want to weigh in.