Method and apparatus for measuring concentration of test substance in organism
First Claim
1. An apparatus for measuring the concentration of a test substance in an organism, the apparatus comprising:
- a first sensor which is configured to be arranged at a position A, the position A is located inside of the organism but outside of a blood vessel of the organism;
a second sensor which is configured to be arranged at a position B, the position B is located inside of the organism but outside of the blood vessel of the organism, and is located more distant from the blood vessel than the position A;
an irradiation unit which irradiates the first and second sensors with irradiating light;
a detector which detects a first returning light beam that has returned from around the first sensor and a second returning light beam that has returned from around the second sensor;
a calculation circuit which calculates first and second concentrations based on the first and second returning light beams, respectively, and the first and second concentrations are concentrations of the test substance at the positions A and B, respectively; and
a decision circuit which determines, based on the first and second concentrations, whether or not an equilibrium has been established yet between a concentration of the test substance inside of the blood vessel and a concentration of the test substance measured at a position inside of the organism but outside of the blood vessel of the organism,wherein when the difference between the first and second concentrations is less than a predetermined value, the decision circuit decides that the equilibrium has already been established between the concentration of the test substance inside of the blood vessel and the concentration of the test substance measured at the position inside of the organism but outside of the blood vessel of the organism.
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Accused Products
Abstract
An exemplary apparatus for measuring the concentration of a test substance in an organism disclosed herein includes: a measurement system which measures first and second concentrations that are concentrations of the test substance at positions A and B, respectively, where the positions A and B are located inside of the organism but outside of the blood vessel of the organism, and the position B is located more distant from the blood vessel than the position A is; and a decision circuit which determines, based on the first and second concentrations, whether or not an equilibrium has been established yet between a concentration of the test substance inside of the blood vessel and a concentration of the test substance measured at a position inside of the organism but outside of the blood vessel of the organism.
6 Citations
16 Claims
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1. An apparatus for measuring the concentration of a test substance in an organism, the apparatus comprising:
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a first sensor which is configured to be arranged at a position A, the position A is located inside of the organism but outside of a blood vessel of the organism; a second sensor which is configured to be arranged at a position B, the position B is located inside of the organism but outside of the blood vessel of the organism, and is located more distant from the blood vessel than the position A; an irradiation unit which irradiates the first and second sensors with irradiating light; a detector which detects a first returning light beam that has returned from around the first sensor and a second returning light beam that has returned from around the second sensor; a calculation circuit which calculates first and second concentrations based on the first and second returning light beams, respectively, and the first and second concentrations are concentrations of the test substance at the positions A and B, respectively; and a decision circuit which determines, based on the first and second concentrations, whether or not an equilibrium has been established yet between a concentration of the test substance inside of the blood vessel and a concentration of the test substance measured at a position inside of the organism but outside of the blood vessel of the organism, wherein when the difference between the first and second concentrations is less than a predetermined value, the decision circuit decides that the equilibrium has already been established between the concentration of the test substance inside of the blood vessel and the concentration of the test substance measured at the position inside of the organism but outside of the blood vessel of the organism. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for measuring the concentration of a test substance in an organism, the method comprising the steps of:
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(a) measuring first and second concentrations using first and second sensors, respectively, that are concentrations of the test substance at positions A and B, respectively, wherein the first sensor is configured to be arranged at the position A, the position A is located inside of the organism but outside of a blood vessel of the organism, and the second sensor is configured to be arranged at the position B, the position B is located inside of the organism but outside of the blood vessel of the organism, and is located more distant from the blood vessel than the position A; (b) irradiating, via an irradiation unit, the first and second sensors with irradiating light; (c) detecting, via a detector, a first returning light beam that has returned from around the first sensor and a second returning light beam that has returned from around the second sensor; (d) calculating, via a calculation circuit, the first and second concentrations based on the first and second returning light beams, respectively, and the first and second concentrations are concentrations of the test substance at the positions A and B, respectively; and (e) determining, via a decision circuit, based on the first and second concentrations, whether or not an equilibrium has been established yet between a concentration of the test substance inside of the blood vessel and a concentration of the test substance measured at a position inside of the organism but outside of the blood vessel of the organism, wherein when the difference between the first and second concentrations is less than a predetermined value, the decision circuit decides that the equilibrium has already been established between the concentration of the test substance inside of the blood vessel and the concentration of the test substance measured at the position inside of the organism but outside of the blood vessel of the organism. - View Dependent Claims (16)
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Specification