PatentDOI
Vibratory venous and arterial oximetry sensor
H. Harry Asada,Phillip Shaltis +1 more
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TLDR
In this article, a method and an apparatus for distinguishing concentrations of blood constituents among distinct vascular components in situ is presented, which has steps of inducing periodic vibration, characterized by a frequency, in a limb of a person in such a manner as to selectively excite a resonant response in a specified blood vessel of the person, an artery or a vein.Abstract:
A method and an apparatus for distinguishing concentrations of blood constituents among distinct vascular components in situ. The method has steps of inducing periodic vibration, characterized by a frequency, in a limb of a person in such as manner as to selectively excite a resonant response in a specified blood vessel of the person, an artery or a vein, illuminating the limb of the person with a light source, and synchronously detecting a plethysmographic signal for discriminating response attributable to the specified blood vessel.read more
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References
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Signal processing apparatus.
Kheir Diab,Esmaiel Kiani-Azarbayjany,Ibrahim M. Elfadel,Rex Mccarthy,Walter M. Weber,Robert Smith +5 more
TL;DR: In this paper, a method and apparatus for analyzing two measured signals that are modeled as containing primary and secondary portions is presented, where coefficients relate the two signals according to a model defined in accordance with the present invention.
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Stereo pulse oximeter
TL;DR: In this article, a multiple-site, multiple-parameter pulse oximeter was proposed to simultaneously measure arterial and venous oxygen saturation at any specific site and generate a corresponding plethysmograph waveform.
Journal ArticleDOI
Performance of near-infrared spectroscopy in measuring local O(2) consumption and blood flow in skeletal muscle.
TL;DR: NIRS is an appropriate tool to provide information about local muscV(O(2)) and local FBF because both place and depth of the NIRS measurements reveal local differences that are not detectable by the more established, but also more global, Fick method.
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Low noise optical probe
TL;DR: In this paper, a light emitting diode (LED) is affixed to the material, opposite the photodetector and above the chamber, and a scattering medium is interposed between the LED and the material.
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Active pulse blood constituent monitoring
TL;DR: In this paper, a blood constituent monitoring method for inducing an active pulse in the blood volume of a patient was proposed, which results in a cyclic and periodic change in the flow of blood through a fleshy medium under test.