The global blood supply - going vein-to-vein from donor to warehouse to hospital to patient - is tough to track. And tracking problems are part of the reason that thousands of bags of critically needed blood are thrown out every day.

Researchers at the University of Wisconsin-Madison are hoping to use radio frequency identification (RFID) technology to create a way to better track blood supplies around the world. That, according to Alfonso Gutierrez, RFID lab director at the university, could lead to better handling and fewer instances of patients receiving the wrong blood.

The UW-Madison RFID Lab, which is based in the College of Engineering, has partnered with three national blood centers to develop prototypes for using RFID to manage the entire supply chain in blood transfusion medicine. Gutierrez said the team already has completed studies about the safety and economic benefits and now is testing a prototype RFID system to identify, track and monitor the condition of blood products.

Gutierrez noted that the research team just finished testing the technology to prove to the U.S. Food and Drug Administration (FDA) that the radiation emitted by the RFID readers would not harm the blood. "Radio frequency is, in itself, radiation," he explained. "It's basically waves. Any waves, in principle, is radiation. We're used to thinking of high-frequency radiation like x-rays or microwaves. The frequency we are using is much lower. No matter how low, the FDA requires proof of its safety."

The project us funded by a small grant from the National Institutes of Health and by companies in various segments of the blood industry, such as blood bag manufacturers.

A 2005 U.S. Department of Health and Human Services study of 1,322 national medical treatment centers found that more than 32,000 reports of transfusion-related adverse reactions in 2004. There are an estimated 25 million transfusions performed in the United States each year.

"What we're creating is a layer of safety redundancy," Gutierrez told Computerworld. "RFID, in coordination with the bar codes that are used today, is going to increase safety and increase efficiency. And by doing a better job of tracking the blood, we're increasing quality. When a product is not well managed, it ends up being discarded. If it outlasts its shelf life, it needs to be discarded and that happens many, many thousands of times a day."

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