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Proceedings Paper

Validation of NIRS in measuring tissue hemoglobin concentration and oxygen saturation on ex vivo and isolated limb models
Author(s): Xiaorong Xu; Wen Zhu; Vikram Padival; Mengna Xia; Xuefeng Cheng; Robin Bush; Linda Christenson; Tim Chan; Tim Doherty; Angelo Iatridis
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Paper Abstract

Photonify’s tissue spectrometer uses Near-Infrared Spectroscopy for real-time, noninvasive measurement of hemoglobin concentration and oxygen saturation [SO2] of biological tissues. The technology was validated by a series of ex vivo and animal studies. In the ex vivo experiment, a close loop blood circulation system was built, precisely controlling the oxygen saturation and the hemoglobin concentration of a liquid phantom. Photonify’s tissue spectrometer was placed on the surface of the liquid phantom for real time measurement and compared with a gas analyzer, considered the gold standard to measure oxygen saturation and hemoglobin concentration. In the animal experiment, the right hind limb of each dog accepted onto the study was surgically removed. The limb was kept viable by connecting the femoral vein and artery to a blood-primed extracorporeal circuit. Different concentrations of hemoglobin were obtained by adding designated amount of saline solution into the perfusion circuit. Photonify’s tissue spectrometers measured oxygen saturation and hemoglobin concentration at various locations on the limb and compared with gas analyzer results. The test results demonstrated that Photonify’s tissue spectrometers were able to detect the relative changes in tissue oxygen saturation and hemoglobin concentration with a high linear correlation compared to the gas analyzer

Paper Details

Date Published: 29 July 2003
PDF: 10 pages
Proc. SPIE 4955, Optical Tomography and Spectroscopy of Tissue V, (29 July 2003); doi: 10.1117/12.476562
Show Author Affiliations
Xiaorong Xu, Photonify Technologies, Inc. (United States)
Wen Zhu, Photonify Technologies, Inc. (United States)
Vikram Padival, Univ. of Texas at Arlington (United States)
Mengna Xia, Univ. of Texas at Arlington (United States)
Xuefeng Cheng, Photonify Technologies, Inc. (United States)
Robin Bush, Photonify Technologies, Inc. (United States)
Linda Christenson, Photonify Technologies, Inc. (United States)
Tim Chan, Coeur Associates (United States)
Tim Doherty, Coeur Associates (United States)
Angelo Iatridis, Coeur Associates (United States)

Published in SPIE Proceedings Vol. 4955:
Optical Tomography and Spectroscopy of Tissue V
Britton Chance; Robert R. Alfano; Bruce J. Tromberg; Mamoru Tamura; Eva M. Sevick-Muraca, Editor(s)

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