At TED2012, TED fellow Myshkin Ingawale gave a talk on how he helped to develop a prick-free blood hemoglobin measurement device. His technology, conceived after 32 tries, seems to focus specifically on the developing world where cost and access are serious problems.
Though interesting in itself, it should be noted that Masimo has developed its own highly effective pulse oximeter for fast hemoglobin spot checking.
Here's video of Myshkin Ingawale at TED:
This post also appears on medGadget, an Atlantic partner site.
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