Surgeries performed on the wrong organ or limb, or even on the wrong person, are rare, but a Washington University School of Medicine physician thinks he has a solution to prevent them. Richard Chole's CheckSite System uses a patient wristband with a microchip, and two sensors near each operating room door. If the operating team does not mark the proper spot to operate on a patient and fails to place a sticker on the wristband to deactivate the microchip, the sensors sound an alarm.
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