NDLI: Pulse oximetry and PPG measurements in plastic surgery

Content Provider	IEEE Xplore Digital Library
Author	Pickett, J. Amoroso, P. Nield, D.V. Jones, D.P.
Copyright Year	1997
Description	Author affiliation: Clinical Phys. Group, St. Bartholomew's Hosp., London, UK (Pickett, J.)
Abstract	There is a need for a monitor of flap viability in plastic and reconstructive surgery. Pulse oximetry has been suggested as a suitable monitoring technique but commercially available oximeters have difficulty obtaining reliable readings from flaps. This may be due to an inappropriate range of LED currents for the thin flap tissue or to insufficient PPG amplitudes for signal processing. A system has been developed which uses previously described miniature, sterilizable probes to measure both the AC and DC PPG amplitudes at two wavelengths for a range of LED currents. Measurements were made from a variety of sites on normal subjects where a conventional pulse oximeter operates correctly. A second series of measurements were made from healthy tissue on patients undergoing plastic surgery, as a model of a healthy skin flap. The LED currents used on the flap model were within the range available to the pulse oximeter used. The AC PPG amplitudes from the flap model were significantly smaller than those obtained from intact tissue sites. Manual calculations of SaO/sub 2/ made using the PPG measurements from the flap model suggest that a dedicated oximeter with a specially adapted algorithm for flap measurements is feasible.
Starting Page	2330
Ending Page	2332
File Size	287594
Page Count	3
File Format	PDF
ISBN	0780342623
ISSN	1094687X
DOI	10.1109/IEMBS.1997.758831
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1997-10-30
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Pulse measurements Plastics Surgery Light emitting diodes Wavelength measurement Monitoring Signal processing Probes Current measurement Skin
Content Type	Text
Resource Type	Article

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