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From experience, a blood sample which has been milked out of a finger is quite different to a venous blood sample. (I am an anaestheologist and often perform o
by anon4this1 11y ago
From experience, a blood sample which has been milked out of a finger is quite different to a venous blood sample.
(I am an anaestheologist and often perform or ask nurses to perform post-op point of care pinprick blood counts to look for anaemia in patients who have had big surgeries. We do 2 readings to check for error, and I often find that samples which have been squeezed out have a haemoglobin value 10-20% different to those which are drawn from a vein due to expression of tissue fluid.)
- srunni 11y agoIt seems that this isn't an issue for Theranos's FDA-approved HSV-1 assay. See Table 16 and Figure 1: http://www.accessdata.fda.gov/cdrh_docs/reviews/K143236.pdf http://www.accessdata.fda.gov/cdrh_docs/reviews/K143236.pdf However, the skill level of whoever performed the fingerpricks for that data may be significantly higher than the average technician at Theranos's wellness centers. And of course we have no idea about the hundreds of other tests. There seems to be some other correlation data on Theranos's site (https://www.theranos.com/our-lab https://www.theranos.com/our-lab - scroll down to 'Representative Clinical Correlations'), but there's no captions or text to provide context.