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Engineering team invents lab-on-a-chip for fast, inexpensive blood tests
Date:1/10/2011

KINGSTON, R.I. January 10, 2011 -- While most blood tests require shipping a vial of blood to a laboratory for analysis and waiting several days for the results, a new device invented by a team of engineers and students at the University of Rhode Island uses just a pinprick of blood in a portable device that provides results in less than 30 minutes.

"This development is a big step in point-of-care diagnostics, where testing can be performed in a clinic, in a doctor's office, or right at home," said Mohammad Faghri, URI professor of mechanical engineering and the lead researcher on the project. "No longer will patients have to wait anxiously for several days for their test results. They can have their blood tested when they walk into the doctor's office and the results will be ready before they leave."

With the new lab-on-a-chip technology, a drop of blood is placed on a plastic polymer cartridge smaller than a credit card and inserted into a shoebox-sized biosensor containing a miniature spectrometer and piezoelectric micro-pump. The blood travels through the cartridge in tiny channels 500 microns wide to a detection site where it reacts with preloaded reagents enabling the sensor to detect certain biomarkers of disease.

Several patents are pending on the invention.

Compared to similar devices in development elsewhere, the URI system is much smaller, more portable, requires a smaller blood sample, and is less expensive. While the sensor costs about $3,200, each test costs just $1.50, which is the cost for the plastic cartridge and reagents.

The first cartridges the researchers developed focus on the detection of C-reactive proteins (CRP) in the blood, a preferred method for helping doctors assess the risk of cardiovascular and peripheral vascular diseases. From 2002 to 2004 (the only years for which data are available), the number of CRP tests paid for by Medicare tripled from 145,000 to 454,000, and it
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Contact: Todd McLeish
tmcleish@uri.edu
401-874-7892
University of Rhode Island
Source:Eurekalert

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