Google has filed a patent for a wearable device that can take a small sample of your blood without the use of needles. The system is designed for people who are required to frequently test their blood levels.
The patent reveals that the "Needle-Free Blood Draw" device sends an 'abrupt surge' of gas into a barrel with a microparticle that can penetrate the skin without the use of a needle. Once blood emerges from the skin, it will be extracted via a negative pressure barrel. This device is particularly useful to diabete patients who need to check their glucose levels many times a day. "Such an application might be used to draw a small amount of blood, for example, for a glucose test", as Google writes in the patent.
From the patent's diagram, the device is a little tube that's stored in the chunky watch-like device and is then removed and used when the patient's blood needs to be taken.
Google filed the patent back in May 28, 2014, and it has just been approved on Dec 3, 2015. Just last year, Google announced that it was developing 'smart contact lenses' that will be able to monitor blood glucose levels a diabetes patient’s tears.
According to the US Centres for Disease Control and Prevention (CDC) one third of US adults projected to have diabetes by 2050 if current trends continue. WHO also estimates that nine percent of adults aged 18 and above suffer from diabetes in 2014. These patents mark a movement of Google toward providing convenient and painless way to carry out blood tests for diabetes. Full detail of the application can be found at USPTO.