Monitor for continuous in vivo measurement of glucose concentration
First Claim
1. A method for the continuous in vivo measurement of glucose concentration in animal body fluids comprising:
- A. preparing an indwelling glucose monitor adapted to electrically sense variations in the concentration of said glucose in said body fluid, said glucose monitor including a charge-transfer medium comprising a reversible complex of a binding macromolecular component, and a charge-bearing carbohydrate component, said reversible complex reacting with said glucose to change the level of electrical charge sensed by said glucose monitor;
B. placing said glucose monitor in fluid registry with the system of body fluid to be monitored;
C. maintaining said glucose monitor in fluid registry with said system for a period of time sufficient for said body fluid to permeate said glucose monitor, and for any glucose present in said body fluid to react with said reversible complex; and
D. measuring the level of electrical charge sensed by said glucose monitor;
wherein said level of electrical charge varies as a function of the concentration of said glucose, and said monitor is adapted to continually measure variations therein.
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Abstract
A method for the continuous, in vivo measurement of glucose concentration in animal body fluids such as blood, comprises implanting in the body, in registry with the system for the body fluid, a glucose monitor adapted to measure the concentration of glucose as a function of changes in such electrical charge. The glucose monitor includes an electrode with an electrical charge-transfer medium comprising a reversible complex of a binding macromolecular component and a charge-bearing carbohydrate component. The electrode includes a selectively permeable membrane permitting the ingress and egress of the body fluid. In operation, glucose present in the body fluid displaces the charge-bearing carbohydrate, which then participates in the electrical activity of the electrode so that a measurable change in electrical activity can be observed when the electrode is connected to an appropriate current-responsive meter. Preferably, the macromolecular component comprises one or more lectins, and the charge-bearing carbohydrate component may be one or more of the sugars for which testing is desired.
883 Citations
30 Claims
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1. A method for the continuous in vivo measurement of glucose concentration in animal body fluids comprising:
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A. preparing an indwelling glucose monitor adapted to electrically sense variations in the concentration of said glucose in said body fluid, said glucose monitor including a charge-transfer medium comprising a reversible complex of a binding macromolecular component, and a charge-bearing carbohydrate component, said reversible complex reacting with said glucose to change the level of electrical charge sensed by said glucose monitor; B. placing said glucose monitor in fluid registry with the system of body fluid to be monitored; C. maintaining said glucose monitor in fluid registry with said system for a period of time sufficient for said body fluid to permeate said glucose monitor, and for any glucose present in said body fluid to react with said reversible complex; and D. measuring the level of electrical charge sensed by said glucose monitor; wherein said level of electrical charge varies as a function of the concentration of said glucose, and said monitor is adapted to continually measure variations therein. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A glucose monitor for the continuous, in vivo measurement of glucose concentration in animal body fluids comprising:
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A. an electrode adapted to electrically sense variations in the concentration of said glucose in said body fluid; B. said electrode including a charge-transfer medium comprising a reversible complex of a binding macromolecular component, and a charge-bearing carbohydrate component; C. said reversible complex adapted to react with said glucose to change the level of electrical charge sensed by said electrode, to thereby indicate corresponding variations in said glucose concentration. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification