Hopefully, a later model will be more in the size range of an older wireless telephone. The AOTF is to be replaced by two laser diodes, as they become available from the communications industry. In the meantime, the size and cost of the instrument make it difficult to use as a home device for diabetes patients. The concept of biological baseline subtraction is the one new idea employed in this second device. As spectroscopic devices and chemometrics improve, we should see more devices on the horizon being applied to all sorts of blood chemistries.
Blood glucose is only one analyte that can be monitored noninvasively.
Medical diagnostics will be an arena worth watching in the near future. I, for one, am excited about the prospect. Emil W. Ciurczak is a contributing editor of Spectroscopy and a research fellow at Purdue Pharma in Ardsley, New York.