Smartwatches
already collect data about your heart rate, how much exercise you do
and your stress levels, but in the future they could take this a
considerable step further.
Google
has filed a patent for a 'needle-free blood draw' system that could be
built into a wearable attached to someone's wrist, or a hand-held
device.
The
filing describes a machine that sends a pulse of gas into a barrel
containing a 'micro-particle' capable of puncturing the skin and drawing
a small drop of blood.The new wearable from Google
could help diabetics easily monitor their blood glucose levels and come
with a range of other health-centric features. The Mountain View-based
company has filed a patent for a wearable that allows it to take samples
of your blood without the use of needles.

Google suggests the device could even replace glucose testers used by diabetics entirely.
The patent said: 'Such an application might be used to draw a small amount of blood, for example, for a glucose test.'
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