ISOLATED INTRAVENOUS ANALYTE MONITORING SYSTEM
First Claim
1. An analyte monitoring system, comprising:
- a biosensor sensing an analyte concentration in vivo and outputting a signal corresponding to the analyte concentration;
a controller receiving the signal and computing the analyte concentration therefrom; and
an isolation means coupled to the controller and isolating the biosensor from electrical and magnetic noise.
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Accused Products
Abstract
A continuous intravenous analyte monitoring system includes an amperometric biosensor detecting an analyte concentration in the blood, a controller receiving a signal from the biosensor and computing the concentration, and an isolation device isolating the biosensor from EMI. A CPU may be coupled to the controller via the isolation device for continuous output of sensed concentration to a display unit. Isolated circuits may include a temperature sensor transmitting biosensor temperature to the controller for correction of the computed concentration, a multiplexer combining biosensor and temperature sensor signals, and an A/D converter converting multiplexed input to the controller. The biosensor may be a multi-electrode sensor having a working electrode immobilizing an glucose oxidase enzyme to detect blood glucose concentration. The biosensor and temperature sensor may be located in vivo using a catheter for continuous monitoring.
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Citations
22 Claims
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1. An analyte monitoring system, comprising:
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a biosensor sensing an analyte concentration in vivo and outputting a signal corresponding to the analyte concentration; a controller receiving the signal and computing the analyte concentration therefrom; and an isolation means coupled to the controller and isolating the biosensor from electrical and magnetic noise. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An isolated intravenous analyte monitoring system, comprising:
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an isolated sensing circuit including an in vivo biosensor sensing an analyte level in blood and outputting a signal corresponding to the analyte concentration; and a controller receiving the digital data and computing therefrom a concentration of the analyte; a non-isolated computer circuit including a CPU processing the computed analyte concentration; and a display unit coupled to the CPU and displaying the computed analyte concentration; and an isolation device providing EMI isolation between the isolated sensing circuit and the non-isolated computer circuit. - View Dependent Claims (18, 19, 20, 21)
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22. An isolated intravenous glucose monitoring system, comprising:
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an in vivo enzyme electrode immobilizing glucose oxidase and outputting a signal proportional to blood glucose concentration; an in vivo temperature sensor outputting a signal proportional to temperature of the enzyme electrode; a controller computing a temperature-corrected blood glucose concentration signal from the temperature signal and the blood glucose concentration signal; and an isolation means isolating the enzyme electrode, the temperature sensor, and the controller from electrical and magnetic noise.
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Specification