Peripheral blood circulation state detecting apparatus
First Claim
1. An apparatus for detecting a state of peripheral blood circulation of a subject, comprising:
- transmission type blood oxygen saturation measuring means for emitting a plurality of lights, each light having a different wavelength, toward said subject, producing a photoelectric pulse wave signal indicative of intensity of each of the lights transmitted through said subject, and determining a first blood oxygen saturation by using the pulse wave signals corresponding to the transmitted lights;
reflection type blood oxygen saturation measuring means for emitting a plurality of lights, each light having a different wavelength toward said subject, producing a photoelectric pulse wave signal indicative of intensity of each of the lights reflected from said subject, and determining a second blood oxygen saturation by using the pulse wave signals corresponding tot he reflected lights; and
peripheral blood circulation determining means for determining a state of peripheral blood circulation of said subject by utilizing a difference between said first and second blood oxygen saturations.
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Accused Products
Abstract
An apparatus for detecting a state of peripheral blood circulation of a subject, including a transmission type blood oxygen saturation measuring device emitting a plurality of lights having different wavelengths toward a subject, producing a photoelectric pulse wave signal indicative of intensity of each of the lights transmitted through the subject, and determining a first blood oxygen saturation by using the pulse wave signals corresponding to the transmitted lights; a reflection type blood oxygen saturation measuring device emitting a plurality of lights having different wavelengths toward the subject, producing a photoelectric pulse wave signal indicative of intensity of each of the lights reflected from the subject, and determining a second blood oxygen saturation by using the pulse wave signals corresponding to the reflected lights; and a determining device determining a state of peripheral blood circulation of the subject by utilizing a difference between the first and second blood oxygen saturations.
24 Citations
15 Claims
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1. An apparatus for detecting a state of peripheral blood circulation of a subject, comprising:
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transmission type blood oxygen saturation measuring means for emitting a plurality of lights, each light having a different wavelength, toward said subject, producing a photoelectric pulse wave signal indicative of intensity of each of the lights transmitted through said subject, and determining a first blood oxygen saturation by using the pulse wave signals corresponding to the transmitted lights; reflection type blood oxygen saturation measuring means for emitting a plurality of lights, each light having a different wavelength toward said subject, producing a photoelectric pulse wave signal indicative of intensity of each of the lights reflected from said subject, and determining a second blood oxygen saturation by using the pulse wave signals corresponding tot he reflected lights; and peripheral blood circulation determining means for determining a state of peripheral blood circulation of said subject by utilizing a difference between said first and second blood oxygen saturations. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A peripheral blood circulation monitor for monitoring peripheral blood circulation of a subject, comprising:
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transmission type blood oxygen saturation measuring means for emitting a first light having a first wavelength and a second light having a second wavelength different from said first wavelength, each toward a body portion of said subject, producing a first photoelectric pulse wave signal indicative of an intensity of the first light transmitted through said body portion of said subject and a second photoelectric pulse wave signal indicative of an intensity of the second light transmitted through said body portion of said subject, and determining a first blood oxygen saturation based on said first and second pulse wave signals; reflection type blood oxygen saturation measuring means for emitting a third light having a third wavelength and a fourth light having a fourth wavelength different from aid third wavelength, each toward said body portion of said subject, producing a third photoelectric pulse wave signal indicative of an intensity of the third light reflected from said body portion of said subject and a fourth photoelectric pulse wave signal indicative of an intensity of the fourth light reflected from said body portion of said subject, and determining a second blood oxygen saturation based on said third and fourth pulse wave signals; peripheral blood circulation determining means for periodically determining a value representative of a state of peripheral blood circulation of said subject, based on a difference between said first and second blood oxygen saturations, at regular intervals of time; and informing means for comparing each of the values determined by said peripheral blood circulation determining means, with a predetermined reference value, and informing an operator of the comparison result. - View Dependent Claims (11, 12, 13, 14, 15)
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Specification