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Multiwavelength pulse oximetry: theory for the future.
Anesth Analg
December 2007
From the *Ogino Memorial Research Laboratory, Nihon Kohden Corporation; †Department of Respirology, National Tokyo Hospital, Tokyo; and ‡Nagano Children's Hospital, Nagano, Japan.
Background: As the use of pulse oximeters increases, the needs for higher performance and wider applicability of pulse oximetry have increased. To realize the full potential of pulse oximetry, it is indispensable to increase the number of optical wavelengths. To develop a multiwavelength oximetry system, a physical theory of pulse oximetry must be constructed.
View Article and Find Full Text PDFCardiac output measurement by pulse dye densitometry using three wavelengths.
Pediatr Crit Care Med
July 2004
Department of Anesthesia and the Intensive Care Unit, National Center for Child Health and Development, Tokyo, Japan.
Objectives: Pulse dye densitometry (PDD), based on the principles of pulse oximetry and dye-dilution technique, is a less invasive method of measuring cardiac output (CO). We have developed prototype equipment to measure CO in pediatric patients using this technique. The purpose of our study was to evaluate the accuracy of this new PDD system using three wavelengths for pediatric application by comparing measurement with an ultrasound flowmeter.
View Article and Find Full Text PDFPulse oximetry: its invention, theory, and future.
J Anesth
February 2004
Research and Development Laboratory, Nihon Kohden Corporation, 1-31-4 Nishiochiai, Shinjuku-ku, Tokyo 161-8560, Japan.
The theory and applications of pulse spectrophotometry.
Anesth Analg
January 2002
R&D Center, Nihon Kohden Corp., Tokyo, Japan.
Opening of the first door of pulse photometry gave us pulse oximeter. The next door opens to multiwavelength pulse photometry. It will give us a high performance pulse oximeter, providing a wide variety of clinical information simultaneously.
View Article and Find Full Text PDFPulse oximetry: its invention, contribution to medicine, and future tasks.
Anesth Analg
January 2002
RD Center, Nihon Kohden Corp., Tokyo, Japan.
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