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Radio frequency identification (RFID) systems such as security access cards and electronic toll units on car windshields have become increasingly common in everyday life. Now, they also are being used in medicine to do all sorts of things, such as tracking surgical sponges, preventing drug counterfeiting, and monitoring blood products. But, as with any new technology that develops rapidly, unintended consequences are bound to happen. RFID systems potentially can induce electromagnetic interference that affects the performance of electrical equipment. This is problematic in intensive care units, where many electronic medical devices are present, and patients are less likely to tolerate adverse consequences of electrical glitches.
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