Multiwavelength pulse oximetry in the measurement of hemoglobin fractions

Manzke, Bernd; Schwider, Johannes; Lutter, N.; Engelhardt, Kai; Stork, Wilhelm

doi:10.1117/12.238813

Cited by 4 publications

(1 citation statement)

References 2 publications

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“…It is also possible to minimize the thermal effects by activating the laser diodes with narrow-width pulses. In consequence, laser diodes constitute an interesting alternative for multiwavelength systems, 45 despite their working conditions. Their use would be more justified if they were combined with other techniques based on such exclusive laser characteristics as coherence or high monochromaticity.…”

Section: Discussionmentioning

confidence: 99%

Near-infrared transmittance pulse oximetry with laser diodes

2003

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Pulse oximeters are widely used for noninvasive monitoring of oxygen saturation in arterial blood hemoglobin. We present a transmittance pulse oximetry system based on near-infrared (NIR) laser diodes (750 and 850 nm) for monitoring oxygen saturation of arterial blood hemoglobin. The pulse oximetry system is made up of the optical sensor, sensor electronics, and processing block. Also, we show experimental results obtained during the development of the whole NIR transmittance pulse oximetry system along with modifications in the sensor configuration, signal processing algorithm, and calibration procedure. Issues concerning wavelength selection and its implications for the improvement of the transmittance pulse oximetry technique are discussed. The results obtained demonstrate the proposed system's usefulness in monitoring a wide range of oxygen saturation levels.

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Section: Discussionmentioning

confidence: 99%

Near-infrared transmittance pulse oximetry with laser diodes

2003

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Noninvasive measurement of total hemoglobin and hemoglobin derivatives using multiwavelength pulse spectrophotometry -In vitro study with a mock circulatory system

Suzaki¹,

Kobayashi

Nagaoka³

et al. 2006

2006 International Conference of the IEEE Engineering in Medicine and Biology Society

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Total hemoglobin (tHb), carboxyhemoglobin (COHb), and methemoglobin (MetHb) are usually measured with a CO-oximeter. Noninvasive and continuous measurement of these blood components is expected to decrease the pain of a patient. Therefore, we developed an instrument to measure oxygen saturation (SpO(2), tHb, COHb, and MetHb non invasively. Multiwavelength LED (600, 625, 660, 760, 800, 940, and 1300 nm) and a combined detector (Si, InGaAs) were built into the instrument (Seven wavelengths transparent pulse spectrophotometer). We used the Waseda mock circulatory system, which can simulate blood circulation in tissues and generate a pulse wave mechanically, to estimate the instrument's performance. Furthermore we proposed new calculation formula including DC components of optical density (this method). Under conditions without any change of other components, the mean error +/- standard deviation between this method and the CO-oximetry were SaO(2)=0.0 +/- 1.4%, tHb=0.0 +/- 0.0 g/dl, COHb=0.0 +/- 2.0%, and MetHb=0.0 +/- 0.3%. When the concentration of other components was changed, this method showed mean errors and standard deviations of SaO(2)=0.2 +/- 1.6%, tHb=0.0 +/- 0.4 g/dl, COHb=0.5 +/- 4.1%, and MetHb=0.0 +/- 0.3%

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Transmittance photoplethysmography and pulse oximetry with near infrared laser diodes

López-Silva

Dotor²,

Silveira³

et al.

Proceedings of the 21st IEEE Instrumentation and Measurement Technology Conference (IEEE Cat. No.04CH37510)

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Photoplethysmography and pulse oximetry are widely used techniques for noninvasive monitoring of heart rate and peripheral oxygen saturation. In recent years we have been working on the application of near infrared range wavelengths to replace those of the classical pulse oximeters. The development of laser diodes based sensors, processing algorithms, a calibration procedure, and the comparison with a commercial pulse oximeter, have been followed by a set of experimental studies. The results presented here demonstrate the feasibility of transmittance photoplethysmography for pulse oximetry in both peripheral and non-peripheral beds under different conditions.

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Multiwavelength pulse oximetry in the measurement of hemoglobin fractions

Cited by 4 publications

References 2 publications

Near-infrared transmittance pulse oximetry with laser diodes

Near-infrared transmittance pulse oximetry with laser diodes

Noninvasive measurement of total hemoglobin and hemoglobin derivatives using multiwavelength pulse spectrophotometry -In vitro study with a mock circulatory system

Transmittance photoplethysmography and pulse oximetry with near infrared laser diodes

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