WO2005065542A3 - Real time self-adjusting calibration algorithm - Google Patents

Real time self-adjusting calibration algorithm Download PDF

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Publication number
WO2005065542A3
WO2005065542A3 PCT/US2004/044086 US2004044086W WO2005065542A3 WO 2005065542 A3 WO2005065542 A3 WO 2005065542A3 US 2004044086 W US2004044086 W US 2004044086W WO 2005065542 A3 WO2005065542 A3 WO 2005065542A3
Authority
WO
WIPO (PCT)
Prior art keywords
sensor
data
values
threshold
filtering
Prior art date
Application number
PCT/US2004/044086
Other languages
French (fr)
Other versions
WO2005065542A2 (en
Inventor
John J Shin
Nandita N Patel
Sami Kanderian Jr
Lu Wang
Richard Yoon
Original Assignee
Medtronic Minimed Inc
John J Shin
Nandita N Patel
Sami Kanderian Jr
Lu Wang
Richard Yoon
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Medtronic Minimed Inc, John J Shin, Nandita N Patel, Sami Kanderian Jr, Lu Wang, Richard Yoon filed Critical Medtronic Minimed Inc
Priority to CA2548286A priority Critical patent/CA2548286C/en
Priority to DK04816061.8T priority patent/DK1699352T3/en
Priority to EP04816061A priority patent/EP1699352B1/en
Priority to JP2006547604A priority patent/JP2007516814A/en
Publication of WO2005065542A2 publication Critical patent/WO2005065542A2/en
Publication of WO2005065542A3 publication Critical patent/WO2005065542A3/en

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6846—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive
    • A61B5/6847—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive mounted on an invasive device
    • A61B5/6848—Needles
    • A61B5/6849—Needles in combination with a needle set
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
    • A61B5/14532—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue for measuring glucose, e.g. by tissue impedance measurement
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
    • A61B5/14546—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue for measuring analytes not otherwise provided for, e.g. ions, cytochromes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
    • A61B5/1486—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using enzyme electrodes, e.g. with immobilised oxidase
    • A61B5/14865—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using enzyme electrodes, e.g. with immobilised oxidase invasive, e.g. introduced into the body by a catheter or needle or using implanted sensors
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
    • A61B5/1495—Calibrating or testing of in-vivo probes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6846—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive
    • A61B5/6847—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive mounted on an invasive device
    • A61B5/6848—Needles
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2560/00—Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
    • A61B2560/02—Operational features
    • A61B2560/0223—Operational features of calibration, e.g. protocols for calibrating sensors
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/0002—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
    • A61M5/172—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body electrical or electronic
    • A61M5/1723—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body electrical or electronic using feedback of body parameters, e.g. blood-sugar, pressure
    • A61M2005/1726—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body electrical or electronic using feedback of body parameters, e.g. blood-sugar, pressure the body parameters being measured at, or proximate to, the infusion site

Abstract

A method and a system for verifying the integrity of sensor data. Values are received (2100) from a sensor. A parameter related to the values is compared to a threshold (2110). For example the second-order derivative of the values may be compared to a threshold. Additional threshold violations are monitored for further values received from the sensor (2130). The receipt of data is terminated when two parameters exceed the threshold (2170). A method and a system for filtering data based on a quantifier of a variance derived from sensor data. The quantifier being used as input to an adaptive filter for filtering the sensor data. A method and a system for calibrating a sensor by determining the reliability of the sensor data, discarding data values that are unreliable, filtering the data values that have not been discarded and adjusting the output of the sensor using the filtered data values.
PCT/US2004/044086 2003-12-31 2004-12-23 Real time self-adjusting calibration algorithm WO2005065542A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CA2548286A CA2548286C (en) 2003-12-31 2004-12-23 Real time self-adjusting calibration algorithm
DK04816061.8T DK1699352T3 (en) 2003-12-31 2004-12-23 Method and apparatus for verifying the integrity of sensor data
EP04816061A EP1699352B1 (en) 2003-12-31 2004-12-23 Method and apparatus for verifying the integrity of sensor data
JP2006547604A JP2007516814A (en) 2003-12-31 2004-12-23 Real-time self-tuning calibration algorithm

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/750,978 US7890295B2 (en) 2000-02-23 2003-12-31 Real time self-adjusting calibration algorithm
US10/750,978 2003-12-31

Publications (2)

Publication Number Publication Date
WO2005065542A2 WO2005065542A2 (en) 2005-07-21
WO2005065542A3 true WO2005065542A3 (en) 2005-12-29

Family

ID=34749343

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2004/044086 WO2005065542A2 (en) 2003-12-31 2004-12-23 Real time self-adjusting calibration algorithm

Country Status (6)

Country Link
US (2) US7890295B2 (en)
EP (1) EP1699352B1 (en)
JP (2) JP2007516814A (en)
CA (1) CA2548286C (en)
DK (1) DK1699352T3 (en)
WO (1) WO2005065542A2 (en)

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US7890295B2 (en) 2011-02-15
JP2012071177A (en) 2012-04-12
JP2007516814A (en) 2007-06-28
DK1699352T3 (en) 2013-05-27
US9204840B2 (en) 2015-12-08
US20050004439A1 (en) 2005-01-06
JP5283764B2 (en) 2013-09-04
EP1699352B1 (en) 2013-02-13
CA2548286C (en) 2017-07-11
EP1699352A2 (en) 2006-09-13
WO2005065542A2 (en) 2005-07-21
US20090005666A1 (en) 2009-01-01
CA2548286A1 (en) 2005-07-21

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