Researchers use radio nodes to minitor blood bags

Recent developments in biopreservation science and technology.

Researchers use radio nodes to monitor blood bags.  German researchers have developed blood-bag monitors that use radio nodes to track blood temperature and interact with patients' nodes to warn about medical errors, such as if the wrong blood type is about to be used.  Noninterference with hospital medical devices and continuous broadcast are among the advantages of using radio nodes over radio frequency identification tags.

http://www.dailytech.com/Radio+Nodes+Used+to+Create+Smart+Blood+Bags/article17046c.htm