New Reflection Oximeter

Polanyi, Michael L.; Hehir, Robert M.

doi:10.1063/1.1716990

Cited by 48 publications

(17 citation statements)

References 4 publications

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“…The use of fiberoptics for oximetry began in the early 1960s (Polyani, 1960(Polyani, ,1962Enson, 1962;Kapany, 1967). Oxygen saturation measurements were made from blood in major vessels or the heart using catheterisation.…”

Section: In Vivo Methodsmentioning

confidence: 99%

The wavelength dependence of the photoplethysmogram and its implication to pulse oximetry

Crowe

Damianou

1992

Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society

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The importance of complete opposition of the reflectance probe was examined on an adult finger. False low oxygen saturation readings were recorded with malpositioned probes. A new probe with modified geometry was designed which offered an improved performance in reducing this artifact and further suggestions were given for its possible elimination.Finally, a proposal for a novel, visible multi-wavelength reflection pulse oximeter is presented with the aim of replacing current pulse oximeters in certain situations where their use is questionable.

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Section: In Vivo Methodsmentioning

confidence: 99%

The wavelength dependence of the photoplethysmogram and its implication to pulse oximetry

Crowe

Damianou

1992

Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society

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“…Dye dilution curves were recorded with a fiberoptic catheter and the In Vivo Hemoreflectometer equipment (Polanyi and Hehir, 1960;Gamble, Hugenholtz, Monroe, Polanyi, and Nadas, 1965;Hugenholtz, Wagner, and Sandler, 1968). The fiberoptic catheter consists of two bundles of 150 clad glass fibers within the lumen of a standard 6 F cardiac catheter.…”

Section: Methodsmentioning

confidence: 99%

Simultaneous determination of the stroke volume and the left ventricular residual fraction with the fiberoptic- and thermodilution method

Bussmann

Krayenbühl

Rutishauser

1971

Cardiovascular Research

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Authors' synopsis Simultaneous measurements of the concentration of dye by a fiberoptic catheter and of the temperature by a thermistor catheter were obtained in dogs. No significant diference for cardiac output and stroke uolume was found. The slightly but significant higher residual.fraction by thermodilution than by Jiberoptic technique is caused by cold transfer between irentricular myocardium and caoity. It becomes evident after the jifth beat.Indicator dilution methods have been used t o measure ventricular volume for many years. The technique involves ventricular injection of a n indicator with measurement of its serial dilution immediately beyond the semilunar valves. Mainly cold or dye as indicators are employed (Holt, 1956;Liithy, 1962;Rapaport, Wiegand, and Bristow, 1962;Hugenholtz, Gamble, Monroe, and Polanyi, 1965; Krayenbuhl, 1969). To our knowledge n o comparison of the thermodilution versus the dye method with intravascular measurement at the same sensor site has yet been reported.Thermodilution is assumed to be complicated by heat exchange between blood and the heart wall because of temperature gradient (Rolett, Sherman, and Gorlin, 1964). The resultant cooling of the inner layers of the ventricular wall may serve as a storage of indicator which is then gradually released to the chamber as the blood temperature gradient is reversed. As a result the indicator decay slope may be prolonged.The present study was undertaken t o compare left ventricular residual fraction a n d stroke volume of simultaneously recorded aortic thermal and fiberoptic dye dilution curves and to estimate the error from heat transfer complicating the thermodilution method. For rapid sensing of the washout steps the thermistor and the fiberoptic catheters, both with similar time constants, were positioned together in the ascending aorta above the aortic valves. MethodsExperiments were carried out in five male mongrel dogs, ranging between 2 1 and 23 kg body weight. After premedication with z mg morphine sulphate/kg body weight, the animals were anaesthetized with 90 mg/kg body weight of a-chloralose. Heparin was given in a dose of 300 i.u./kg body weight. The animals were intubated with a cuffed endotracheal tube and ventilated with air by means of an Engstrom respirator at a rate of 20 c/min. Care was taken to maintain stable normal body temperature throughout the experiment.Catheters were positioned under fluoroscopic control in the following manner: through the

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“…They were based on intensity-modulated schemes and initially proposed for the intravascular and cardiac applications. In 1960, Michael Polanyi (American Optical Company, Southbridge, MA) and Robert Hehir (St. Vicent Hospital, Worcester, MA) presented an optical system for measurement of the in-vivo oxygen saturation and dye concentration in the blood [22] (Fig. 3).…”

Section: Earlier Intensity-modulated Configurationsmentioning

confidence: 99%

“…3). The innovative contribution of the system was its sensing probe, made of two glass fibers bundles located within a catheter (about 150 fibers with about 50 m in diameter each) [22][23][24]. These two bundles have been used as waveguides, one to guide the filtered light from a tungsten lamp source to the tip of the catheter, the other to guide the back-scattered and diffusely reflected light, modified in its spectral distribution due to blood interaction, into a photocell.…”

Section: Earlier Intensity-modulated Configurationsmentioning

confidence: 99%

Fiber optic intensity-modulated sensors: a review in biomechanics

et al. 2012

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Fiber optic sensors have a set of properties that make them very attractive in biomechanics. However, they remain unknown to many who work in the field. Some possible causes are scarce information, few research groups using them in a routine basis, and even fewer companies offering turnkey and affordable solutions. Nevertheless, as optical fibers revolutionize the way of carrying data in telecommunications, a similar trend is detectable in the world of sensing. The present review aims to describe the most relevant contributions of fiber sensing in biomechanics since their introduction, from 1960s to the present, focusing on intensity-based configurations. An effort has been made to identify key researchers, research and development (R&D) groups and main applications.

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New Reflection Oximeter

Abstract: It is experimentally shown that the ratio of light reflected by a nonhemolysed blood sample at two suitable wavelengths is a linear function of the oxygen saturation. A simple instrument to determine oxygen saturation in vitro, based on these findings, is described.

Cited by 48 publications

References 4 publications

The wavelength dependence of the photoplethysmogram and its implication to pulse oximetry

The wavelength dependence of the photoplethysmogram and its implication to pulse oximetry

Simultaneous determination of the stroke volume and the left ventricular residual fraction with the fiberoptic- and thermodilution method

Fiber optic intensity-modulated sensors: a review in biomechanics

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