Micro-invasive method for painless detection of analytes in...

Details Micro-invasive method for painless detection of analytes in... Micro-invasive method for painless detection of analytes in...

2005-04-13

2008-08-05

Winakur, Eric F (Department: 3768)

Surgery

Diagnostic testing

Measuring or detecting nonradioactive constituent of body...

Reexamination Certificate

active

07409238

ABSTRACT:
A method of detecting at least one analyte in extra-cellular spaces includes the step of inserting a microprobe through the stratum corneum toward the stratum basale of the skin of a subject into extra-cellular spaces containing interstitial fluid having at least one analyte to be detected, said microprobe having a diameter at its tip no larger than approximately 10-50 microns. The method further includes optically testing for a predetermined analyte in the extra-cellular space adjacent the distal end of the microprobe without drawing a sample of the interstitial fluid. Preferably the microprobe body includes a sensor layer covering the distal optical tip of the microprobe body, the sensor layer being adapted to interact with a predetermined analyte to be detected in the interstitial fluid, and an optical detector responsive to interaction of the sensor layer with the predetermined analyte to signal detection of said predetermined analyte.

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