Attribute compensation for analyte detection and/or continuous monitoring

• US 6,918,874 B1
• Filed: 09/10/1999
• Issued: 07/19/2005
• Est. Priority Date: 09/10/1998
• Status: Expired due to Fees

• Current Assignee: MidCap Funding III, LLC, Nitto Denko Corporation
• Original Assignee: Altia Technology (Altia Group), Spectro Incorporated (Spectro Scientific, Inc.)
• Inventors: Eppstein, Jonathan A., McRae, Stuart, Hatch, Michael R.
• Primary Examiner(s): Dahbour, Fadi H.
• Application Number:
  US09/786,830
• Time in Patent Office: 2,139 Days
• Field of Search: 600/365, 600/309, 600/345, 600/347, 600/348, 600/354, 600/355, 600/357, 600/372, 600/382, 600/384, 600/396, 600/397, 600/573, 600/578, 604/19, 604/20
• US Class Current: 600/365
• CPC Class Codes: A61B 10/0045 Devices for taking samples of body liquids devices for taking blood samples A61B5/15
• CPC Class Codes: A61B 2010/008 Interstitial fluid
• CPC Class Codes: A61B 5/00 Measuring for diagnostic purposes radiation diagnosis A61B6/00; diagnosis by ultrasonic, sonic or infrasonic waves A61B8/00; Identification of persons
• CPC Class Codes: A61B 5/0002 Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network A61B5/07 takes precedence; transmission systems for measured values G08C; transmission H04B; transmission of digital information H04L; wireless communication networks H04W
• CPC Class Codes: A61B 5/14514 using means for aiding extraction of interstitial fluid, e.g. microneedles or suction
• CPC Class Codes: A61B 5/14532 for measuring glucose, e.g. by tissue impedance measurement

Abstract

A system and method for detecting a measuring an analyte in a biological fluid of an animal. A harvesting device (10) is provided suitable for positioning on the surface of tissue of an animal to harvest biological fluid therefrom. The harvesting device (10) comprises an analyte sensor (50) positioned to be contacted by the harvested biological fluid and which generates a measurement signal representative of the analyte. At least one attribute sensor (40) is provided to measure an attribute associated with the biological fluid harvesting operation of the harvesting device (10) or the assay of the biological fluid, and which generates an attribute signal representative of the attribute. Adjustments are made to operational parameters of the harvesting device (10) based on the one or more attributes.

Claims

1. A system for detecting and measuring an analyte in a biological fluid of a animal, comprising:

a harvesting device suitable for positioning on the surface of tissue of an animal to harvest biological fluid therefrom, and comprising an analyte sensor positioned to be contacted by the harvested biological fluid and which generates a measurement signal representative of the analyte;

at least one attribute sensor to measure an attribute associated with the operation of the harvesting device and which generates an attribute signal representative of the attribute, wherein the attribute sensor detects a condition of the tissue indicative of fluid productivity; and

a processor coupled to the attribute sensor and the analyte sensor to receive the attribute signal and the measurement signal, wherein the processor adjusts for an operational parameter of the harvesting device based on attribute signal, and wherein the processor generates a signal to control an amount of suction applied to the harvesting device based on the attribute signal.

2. A method for detecting and measuring an analyte in a biological fluid of a subject, comprising steps of:

harvesting biological fluid from the surface of tissue of an animal with a harvesting device;

contacting an analyte sensor with the biological fluid on the tissue surface;

detecting an analyte in the biological fluid with the analyte sensor;

sensing an attribute associated with the operation of the harvesting device, wherein the step of sensing an attribute comprises sensing a condition of the issue indicative of fluid productivity; and

adjusting an operational parameter of the harvesting device based on attribute, wherein the step of adjusting comprises adjusting a level of suction applied to the harvesting device for drawing fluid from the tissue into contact with analyte sensor.

3. A method for detecting and measuring an analyte in a biological fluid of a subject, comprising steps of:

harvesting biological fluid from the surface of tissue of an animal with a harvesting device, wherein the step of harvesting comprises continually harvesting biological fluid from the surface of tissue;

contacting an analyte sensor with the biological fluid on the tissue surface;

continually detecting an analyte in the biological fluid with the analyte sensor, wherein the step of detecting an analyte in a biological fluid of a subject comprises continually detecting the analyte;

sensing an attribute associated with the operation of the harvesting device, wherein the step of sensing an attribute comprises continually sensing an attribute proximate to the analyte sensor; and

adjusting an operational parameter of the harvesting device based on attribute, wherein the step of adjusting comprises continually adjusting an operational parameter of the device.