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A tattoo to monitor health
The team is developing a sensor to inject into the top layer of the skin that falls off after seven days, like a non-permanent tattoo
A sensor to be injected into the skin just like a tattoo that measures sodium concentrations in the blood has been developed by US scientists. The sensor could be used to monitor diseases or warn against dangerously low sodium levels during exercise.
Heather Clark from Northeastern University, Boston, and coworkers made plastic nanobeads that fluoresce to different extents with changes in sodium levels. The beads are coated with a biocompatible polymer and are injected just under the skin to allow the fluorescence to be monitored easily. More...
http://www.rsc.org/Publishing/Journals/cb/Volume/2010/12/tattoo_monitor_health.asp
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