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Proceedings Paper

Preliminary clinical investigations of a new noninvasive venous pulse oximeter
Author(s): Daniel Chan; Peter R. Smith; Michael P. Caine; Tomasz Spyt; Maria Boehm; David Machin
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Paper Abstract

For decades, the monitoring of mixed venous oxygen saturation, SvO2 has been performed invasively using fibre-optic catheters. This procedure is not without risk as complications may arise from catheterisation. The group has devised a new non-invasive venous oximetry method which involves inducing regular modulations of the venous blood volume and associated measurement of those modulations using optical means. A clinical investigation was conducted in Glenfield Hospital, UK to evaluate the sensitivity of the new technique to haemodynamic changes such as Cardiac Output (CO) in intraoperative and postoperative cardiac patients. Preliminary trials on patients recovering from cardiac surgery yielded an average correlation of r = 0.72 between CO at different Intra Aortic Balloon Pump (IABP) augmentation levels and SvO2 measured by the new venous oximeter. In intraoperative patients undergoing off-pump cardiac surgery, SvO2 recorded by the new technique responded to unplanned events such as a cardiac arrest. CONCLUSION: The new venous oximetry technique is a promising technique which responds to haemodynamic changes such as CO and with further development might offer an alternative means of monitoring SvO2 non-invasively.

Paper Details

Date Published: 14 October 2003
PDF: 8 pages
Proc. SPIE 5143, Novel Optical Instrumentation for Biomedical Applications, (14 October 2003); doi: 10.1117/12.500120
Show Author Affiliations
Daniel Chan, Loughborough Univ. (United Kingdom)
Peter R. Smith, Loughborough Univ. (United Kingdom)
Michael P. Caine, Loughborough Univ. (United Kingdom)
Tomasz Spyt, University Hospitals of Leicester NHS Trust (United Kingdom)
Maria Boehm, University Hospitals of Leicester NHS Trust (United Kingdom)
David Machin, University Hospitals of Leicester NHS Trust (United Kingdom)

Published in SPIE Proceedings Vol. 5143:
Novel Optical Instrumentation for Biomedical Applications
Albert-Claude Boccara, Editor(s)

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