It looks like folks wary of needles now have yet another
piece of technology to look forward to, with this so-called Venus device promising to measure tissue oxygen and pH levels without the need to draw any blood at all. To do that, the system makes use of a relatively small sensor that's placed directly on the skin, which uses near infrared light to measure to measure the blood and analyze both the tissue oxygen and pH, as well as the the metabolic rate. As a bonus, the lack of needles also reduces the the risk of infection, and it's relatively portable nature makes it ideal for use outside of strictly medical situations, such as monitoring athletes -- or astronauts, as it was originally developed for. As you might expect, however, the device is still just in prototype form, and there doesn't appear to be any indication as to when it might move beyond the lab.