Transcutaneous bilirubin concentration measuring apparatus and a measurement data checking plate for use with the same
First Claim
1. A bilirubin concentration measuring apparatus, comprising:
- (a) a light emitter for emitting a light which includes a first luminous flux falling in a first wavelength range and a second luminous flux falling in a second wavelength range, their bilirubin absorption coefficients differing from each other;
(b) a light emerging port for projecting the light including the first and second luminous fluxes from the light emitter onto skin of a person for entering thereinto;
(c) a first light incident port for allowing the first and second luminous fluxes having been diffused in tissues of the person to pass therethrough;
(d) a second light incident port for allowing the first and second luminous fluxes having been diffused in tissues of the person to pass therethrough, the second light incident port being spaced away from the light emerging port a different distance than the first light incident port, so that optical path length of luminous fluxes which pass through the first light incident port and optical path length of luminous fluxes which pass through the second light incident port are different from each other;
(e) a first electric signal generator for generating a first electric signal corresponding to an intensity of the first luminous flux passed through the first light incident port, and a second electric signal corresponding to an intensity of the second luminous flux passed through the first light incident port;
(f) a second electric signal generator for generating a third electric signal corresponding to an intensity of the first luminous flux passed through the second light incident port, and a fourth electric signal corresponding to an intensity of the second luminous flux passed through the second light incident port; and
(g) a calculator for calculating a bilirubin concentration based on the first to fourth electric signals se that includes a processor that cancels the influence of skin by using the luminous fluxes of the different optical path length.
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Accused Products
Abstract
Luminous fluxes from a xenon tube are introduced from one end of an optical fiber to an other end thereof and emerge therefrom. These luminous fluxes are incident of a skin of a person to be measured, and those diffused in the skin are incident on one end of an optical fiber through a first incident port and on one end of an optical fiber through a second incident port. The luminous fluxes from the one end are split by a dichroic mirror. The luminous fluxes reflected by the dichroic mirror are received by a photoelectric conversion element via a blue filter, and those having transmitted through the dichroic mirror are received by a photoelectric conversion element via a green filter. A concentration of bilirubin pigmented in fat of subcutaneous tissues can be accurately measured without being influenced by a difference in the thicknesses of epidermis and derma.
83 Citations
18 Claims
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1. A bilirubin concentration measuring apparatus, comprising:
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(a) a light emitter for emitting a light which includes a first luminous flux falling in a first wavelength range and a second luminous flux falling in a second wavelength range, their bilirubin absorption coefficients differing from each other;
(b) a light emerging port for projecting the light including the first and second luminous fluxes from the light emitter onto skin of a person for entering thereinto;
(c) a first light incident port for allowing the first and second luminous fluxes having been diffused in tissues of the person to pass therethrough;
(d) a second light incident port for allowing the first and second luminous fluxes having been diffused in tissues of the person to pass therethrough, the second light incident port being spaced away from the light emerging port a different distance than the first light incident port, so that optical path length of luminous fluxes which pass through the first light incident port and optical path length of luminous fluxes which pass through the second light incident port are different from each other;
(e) a first electric signal generator for generating a first electric signal corresponding to an intensity of the first luminous flux passed through the first light incident port, and a second electric signal corresponding to an intensity of the second luminous flux passed through the first light incident port;
(f) a second electric signal generator for generating a third electric signal corresponding to an intensity of the first luminous flux passed through the second light incident port, and a fourth electric signal corresponding to an intensity of the second luminous flux passed through the second light incident port; and
(g) a calculator for calculating a bilirubin concentration based on the first to fourth electric signals se that includes a processor that cancels the influence of skin by using the luminous fluxes of the different optical path length. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A bilirubin concentration measuring apparatus, comprising:
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(a) a light emitter for emitting a light which includes a first luminous flux falling in a first wavelength range and a second luminous flux falling in a second wavelength range, their bilirubin absorption coefficients differing from each other;
(b) a light emerging port for projecting the light including the first and second luminous fluxes from the light emitter onto skin of a person for entering thereinto;
(c) a first light incident port for allowing the first and second luminous fluxes having been diffused in tissues of the person to pass therethrough;
(d) a second light incident port for allowing the first and second luminous fluxes having been diffused in tissues of the person to pass therethrough, wherein the first light incident port and the second light incident port have forms of ring or circle having relative different radii so that the second light incident port being spaced away from the light emerging port a different distance than the first light incident port;
(e) a first electric signal generator for generating a first electric signal corresponding to an intensity of the first luminous flux passed through the first light incident port, and a second electric signal corresponding to an intensity of the second luminous flux passed through the first light incident port;
(f) a second electric signal generator for generating a third electric signal corresponding to an intensity of the first luminous flux passed through the second light incident port, and a fourth electric signal corresponding to an intensity of the second luminous flux passed through the second light incident port; and
(g) a calculator for calculating a bilirubin concentration based on the first to fourth electric signals. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A bilirubin concentration measuring apparatus, comprising:
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a light emitter for emitting a light which includes a first luminous flux falling in a first wavelength range and a second luminous flux falling in a second wavelength range, their bilirubin absorption coefficients differing from each other;
a light emerging port for projecting the first and second luminous fluxes onto skin of a person;
a first light incident port for allowing the first and second luminous fluxes having been diffused in the skin to pass therethrough;
a second light incident port for allowing the first and second luminous fluxes having been diffused in the skin to pass therethrough, the second light incident port being spaced away from the light emerging port a different distance than the first light incident port;
a first electric signal generator for generating a first electric signal corresponding to an intensity of the first luminous flux passed through the first light incident port, and a second electric signal corresponding to an intensity of the second luminous flux passed through the first light incident port;
a second electric signal generator for generating a third electric signal corresponding to an intensity of the first luminous flux passed through the second light incident port, and a fourth electric signal corresponding to an intensity of the second luminous flux passed through the second light incident port; and
a calculator for calculating a bilirubin concentration based on the first to fourth electric signals wherein;
the first light incident port has the form of a circle and is disposed in a middle of a light incident plane;
the light emerging port has the form of a ring and is disposed on an outside of the first light incident port; and
the second light incident port has the form of a ring and is disposed on an outside of the light emerging port.
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Specification