Your Apple watch may monitor your heart rate and track your workouts, but there’s one thing it can’t do — monitor your blood sugar levels. Google‘s looking to change all that with a new smartwatch patent it just filed that for a “needle-free blood draw” device that could be implanted into a wearable. The patent also contains a potential hand-held version of the device.

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While the idea of watch sucking blood from your body may give some people the shivers, such a device could make it much easier for diabetics to keep track of their blood glucose levels. It would be less obtrusive than current blood glucose monitoring devices on the market, which tend to be cumbersome and can cause pain and scarring on the fingers. The system works by using gas pressure to pierce the skin with nanoparticles, along with negative pressure to suck a small amount of blood into the device.

It’s not immediately clear what Google plans to do with the patent. In an interview with The Verge, a company spokesperson said, “We hold patents on a variety of ideas — some of those ideas later mature into real products or services, some don’t. Prospective product announcements should not necessarily be inferred from our patents.”

Related: Implantable, Solar-Powered Chip Monitors Blood Sugar Levels

This isn’t Google’s first foray into new medical technologies. The company has already started work on two other options to help diabetics monitor their blood sugar levels: smart contact lenses that measure glucose in a wearer’s tears, and a bandage-sized sensor plugged directly into the cloud. It will be interesting to see which of these devices, if any, actually make it onto the market.

Via Gizmodo

Images via United States Patent and Trademark Office