Apparatus for determining concentrations of hemoglobins
First Claim
1. An apparatus for determining concentrations of hemoglobins comprising:
- a light source for emitting lights of at least three different wavelengths, a first wavelength in a near-infrared wavelength region of 790 to 100 nm, a second wavelength in a red wavelength region of 640 to 675 nm, and a third wavelength in an orangy red wavelength region of 590 to 660 nm;
light receiving means for receiving light emitted by said light source, transmitted through a living tissue or reflected by the living tissue;
attenuation ratio processing means for processing attenuation ratios on said wavelengths based on variations of signals associated with said wavelengths output from said light receiving means, said variations are caused by a pulsation of blood; and
concentration ratio processing means for processing concentration ratios of at least oxyhemoglobin, deoxyhemoglobin and carboxyhemoglobin based on the output signals from said attenuation ratio processing means.
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Abstract
An apparatus for determining concentrations of hemoglobins additionally uses a light source 3 which emits light of a third wavelength in an orangy red wavelength region of 590 to 660 nm. The apparatus includes light receiving means 6 for receiving lights that are emitted by the light sources and transmitted through or reflected by a living tissue, attenuation ratio processing means 15 for processing attenuation ratios Φ on the wavelengths based on variations of signals associated with the wavelengths output from the light receiving means, which variations are caused by a pulsation of blood, and concentration ratio processing means 16 for processing concentration ratios of at least oxyhemoglobin, deoxyhemoglobin and carboxyhemoglobin based on the output signals from the attenuation ratio processing means. The apparatus thus constructed can properly measure carboxyhemoglobin COHb, and present its concentration display and an alarm display in a simple manner, which is clinically effective.
198 Citations
17 Claims
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1. An apparatus for determining concentrations of hemoglobins comprising:
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a light source for emitting lights of at least three different wavelengths, a first wavelength in a near-infrared wavelength region of 790 to 100 nm, a second wavelength in a red wavelength region of 640 to 675 nm, and a third wavelength in an orangy red wavelength region of 590 to 660 nm;
light receiving means for receiving light emitted by said light source, transmitted through a living tissue or reflected by the living tissue;
attenuation ratio processing means for processing attenuation ratios on said wavelengths based on variations of signals associated with said wavelengths output from said light receiving means, said variations are caused by a pulsation of blood; and
concentration ratio processing means for processing concentration ratios of at least oxyhemoglobin, deoxyhemoglobin and carboxyhemoglobin based on the output signals from said attenuation ratio processing means. - View Dependent Claims (2)
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3. An apparatus for determining concentrations of hemoglobins comprising;
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a light source for emitting lights of different wavelengths;
light receiving means for receiving light emitted by said light source, transmitted through a living tissue or reflected by the living tissue;
attenuation ratio processing means for processing attenuation ratios on said wavelengths based on variations of signals associated with said wavelengths output from said light receiving means, said variations caused by a pulsation of blood;
concentration ratio processing means for processing concentration ratios of at least oxyhemoglobin, deoxyhemoglobin and carboxyhemoglobin based on the output signals from said attenuation ratio processing means; and
oxygen saturation processing means for processing one of a functional oxygen saturation and a fractional arterial oxygen saturation based on an output signals of said concentration ratio processing means. - View Dependent Claims (12)
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4. An apparatus for determining concentrations of hemoglobins comprising:
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a light source for emitting lights of different wavelengths;
light receiving means for receiving light emitted by said light source , transmitted through a living tissue or reflected by a living tissue;
attenuation ratio processing means for processing attenuation ratios on said wavelengths based on variations of signals associated with said wavelengths output from said light receiving means, said variations caused by a pulsation of blood;
concentration ratio processing means for processing concentration ratios of at least oxyhemoglobin, deoxyhemoglobin and carboxyhemoglobin based on the output signals from said attenuation ratio processing means; and
alarm display means for displaying an alarm in accordance with a level of a concentration ratio of carboxyhemoglobin produced from said concentration ratio processing means. - View Dependent Claims (13)
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5. An apparatus for determining concentrations of hemoglobins comprising:
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a light source for emitting lights of different wavelengths;
light receiving means for receiving light emitted by said light source, transmitted through a living tissue or reflected by the living tissue;
attenuation ratio processing means for processing attenuation ratios on said wavelengths based on variations of signals associated with said wavelengths output from said light receiving means, said variations caused by a pulsation of blood;
concentration ratio processing means for processing concentration ratios of at least oxyhemoglobin, deoxyhemoglobin and carboxyhemoglobin based on the output signals from said attenuation ratio processing means;
event input means for inputting events on the medical treatment on a patient when said events occur; and
storing means for storing times and event information as input by said event input means, and the processing results output from said concentration ratio processing means. - View Dependent Claims (6, 7, 14)
display means for displaying trends of said processing results, and said event information that is stored in said storing means.
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7. An apparatus for determining concentrations of hemoglobins according to claim 5, further comprising:
an interface used for transmitting said event information, said times and said processing results, which are stored in said storing means, to an external device.
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14. An apparatus for determining concentrations of hemoglobins according to claim 5, wherein said light source for emitting lights of at least three different wavelengths, a first wavelength in a near-infrared wavelength region of 790 to 1000 nm, a second wavelength in a red wavelength region of 640 to 675 nm, and a third wavelength in an orangy red wavelength region of 590 to 660 nm.
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8. An apparatus for determining concentrations of hemoglobins comprising:
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a light source for emitting lights of different wavelengths;
light receiving means for receiving light emitted by said light source, transmitted through the living tissue or reflected by the living tissue;
value input means for inputting a concentration value of at least one kind of light absorbing material in blood for calibration;
attenuation ratio processing means for processing attenuation ratios on said wavelengths based on variations of signals associated with said wavelengths output from said light receiving means, the variations caused by a pulsation of blood; and
concentration processing means for processing concentrations of at least oxyhemoglobin, deoxyhemoglobin and carboxyhemoglobin based on the output signals from said attenuation ratio processing means and said concentration value of said in-blood material input by said value input means. - View Dependent Claims (9, 15)
storing means for storing data on attenuation ratio, wherein said concentration processing means retrospectively processes over again at least one of oxyhemoglobin, deoxyhemoglobin and carboxyhemoglobin by using said data stored in said storing means and said in-blood material concentration value input to said value input means.
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15. An apparatus for determining concentrations of hemoglobins according to claim 8, wherein said light source for emitting lights of at least three different wavelengths, a first wavelength in a near-infrared wavelength region of 790 to 1000 nm, a second wavelength in a red wavelength region of 640 to 675 nm, and a third wavelength in an orangy red wavelength region of 590 to 660 nm.
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10. An apparatus for determining concentrations of hemoglobins comprising:
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a light source for emitting lights of different wavelengths;
light receiving means for receiving light emitted by said light source , transmitted through or reflected by a living tissue;
attenuation ratio processing means for processing attenuation ratios on said wavelengths based on variations of signals associated with said wavelengths output from said light receiving means, which variations are caused by a pulsation of blood;
concentration ratio processing means for processing concentration ratios of at least oxyhemoglobin, deoxyhemoglobin and carboxyhemoglobin based on the output signals from said attenuation ratio processing means; and
select means for giving an instruction to process a concentration ratio of carboxyhemoglobin;
wherein when said select means does not give an instruction to process a concentration ratio of carboxyhemoglobin, said concentration ratio processing means processes concentration ratios of oxyhemoglobin and deboxyhemoglobin on the basis of variations of signals output from said light receiving means upon reception of lights of at least two different wavelengths that are emitted from said light source and transmitted through and reflected by a living tissue, and when said select means gives an instruction to process a concentration ratio of carboxyhemoglobin, said concentration ratio processing means processes concentration ratios of oxyhemoglobin, deoxyhemoglobin and carboxyhemoglobin on the basis of variations of signals output from said light receiving means upon reception of lights of at least three different wavelengths that are emitted from said light source and transmitted through and reflected by a living tissue. - View Dependent Claims (16)
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11. An apparatus for determining concentrations of hemoglobins comprising:
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a light source for emitting lights of different wavelengths;
light receiving means for receiving light emitted by said light source, transmitted through a living tissue or reflected by the living tissue;
attenuation ratio processing means for processing attenuation ratios on said wavelengths based on variations of signals associated with said wavelengths output from said light receiving means, said variations caused by a pulsation of blood;
concentration ratio processing means for processing concentration ratios of at least oxyhemoglobin, deoxyhemoglobin and carboxyhemoglobin based on the output signals from said attenuation ratio processing means; and
display means for displaying measured values of oxyhemoglobin, deoxyhemoglobin and carboxyhemoglobin on the X-Y coordinates. - View Dependent Claims (17)
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Specification