WO2009089021A3 - Impedance measurement and demodulation using implantable device - Google Patents
Impedance measurement and demodulation using implantable device Download PDFInfo
- Publication number
- WO2009089021A3 WO2009089021A3 PCT/US2009/000095 US2009000095W WO2009089021A3 WO 2009089021 A3 WO2009089021 A3 WO 2009089021A3 US 2009000095 W US2009000095 W US 2009000095W WO 2009089021 A3 WO2009089021 A3 WO 2009089021A3
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- demodulation
- noise
- impedance measurement
- implantable device
- demodulator
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
- A61B5/053—Measuring electrical impedance or conductance of a portion of the body
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/026—Measuring blood flow
- A61B5/029—Measuring or recording blood output from the heart, e.g. minute volume
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
- A61B5/053—Measuring electrical impedance or conductance of a portion of the body
- A61B5/0538—Measuring electrical impedance or conductance of a portion of the body invasively, e.g. using a catheter
-
- 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
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7203—Signal processing specially adapted for physiological signals or for diagnostic purposes for noise prevention, reduction or removal
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/18—Applying electric currents by contact electrodes
- A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
- A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
- A61N1/362—Heart stimulators
- A61N1/365—Heart stimulators controlled by a physiological parameter, e.g. heart potential
- A61N1/36514—Heart stimulators controlled by a physiological parameter, e.g. heart potential controlled by a physiological quantity other than heart potential, e.g. blood pressure
- A61N1/36521—Heart stimulators controlled by a physiological parameter, e.g. heart potential controlled by a physiological quantity other than heart potential, e.g. blood pressure the parameter being derived from measurement of an electrical impedance
-
- 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
- A61B5/0031—Implanted circuitry
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
- A61B5/053—Measuring electrical impedance or conductance of a portion of the body
- A61B5/0535—Impedance plethysmography
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/316—Modalities, i.e. specific diagnostic methods
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/316—Modalities, i.e. specific diagnostic methods
- A61B5/318—Heart-related electrical modalities, e.g. electrocardiography [ECG]
- A61B5/346—Analysis of electrocardiograms
- A61B5/349—Detecting specific parameters of the electrocardiograph cycle
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/316—Modalities, i.e. specific diagnostic methods
- A61B5/318—Heart-related electrical modalities, e.g. electrocardiography [ECG]
- A61B5/346—Analysis of electrocardiograms
- A61B5/349—Detecting specific parameters of the electrocardiograph cycle
- A61B5/361—Detecting fibrillation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/18—Applying electric currents by contact electrodes
- A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
- A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
- A61N1/362—Heart stimulators
- A61N1/3621—Heart stimulators for treating or preventing abnormally high heart rate
- A61N1/3622—Heart stimulators for treating or preventing abnormally high heart rate comprising two or more electrodes co-operating with different heart regions
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/18—Applying electric currents by contact electrodes
- A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
- A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
- A61N1/362—Heart stimulators
- A61N1/37—Monitoring; Protecting
- A61N1/3702—Physiological parameters
- A61N1/3704—Circuits specially adapted therefor, e.g. for sensitivity control
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/18—Applying electric currents by contact electrodes
- A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
- A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
- A61N1/372—Arrangements in connection with the implantation of stimulators
- A61N1/37211—Means for communicating with stimulators
- A61N1/37235—Aspects of the external programmer
- A61N1/37241—Aspects of the external programmer providing test stimulations
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/18—Applying electric currents by contact electrodes
- A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
- A61N1/38—Applying electric currents by contact electrodes alternating or intermittent currents for producing shock effects
- A61N1/39—Heart defibrillators
- A61N1/3956—Implantable devices for applying electric shocks to the heart, e.g. for cardioversion
Abstract
An implantable medical device performs impedance measurement and demodulation, such as for obtaining lead impedance measurements, or thoracic impedance measurements, such as for extracting respiration, cardiac stroke, or fluid status information. A 4-point FIR filter demodulator can be used to demodulate a two-phase current excitation waveform. The demodulator can also be used to measure noise for triggering a noise response. Among other things, an increased excitation current level can be used when noise is deemed to be present.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP09700526A EP2240076B1 (en) | 2008-01-08 | 2009-01-08 | Impedance measurement and demodulation using implantable device |
AT09700526T ATE514375T1 (en) | 2008-01-08 | 2009-01-08 | IMPEDANCE MEASUREMENT AND DEMODULATION USING AN IMPLANTABLE DEVICE |
JP2010542265A JP2011509150A (en) | 2008-01-08 | 2009-01-08 | Impedance measuring apparatus and impedance measuring method using embedded device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US1042608P | 2008-01-08 | 2008-01-08 | |
US61/010,426 | 2008-01-08 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2009089021A2 WO2009089021A2 (en) | 2009-07-16 |
WO2009089021A3 true WO2009089021A3 (en) | 2009-09-24 |
Family
ID=40436498
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2009/000095 WO2009089021A2 (en) | 2008-01-08 | 2009-01-08 | Impedance measurement and demodulation using implantable device |
Country Status (5)
Country | Link |
---|---|
US (1) | US9357944B2 (en) |
EP (1) | EP2240076B1 (en) |
JP (1) | JP2011509150A (en) |
AT (1) | ATE514375T1 (en) |
WO (1) | WO2009089021A2 (en) |
Families Citing this family (40)
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JP2011509150A (en) | 2008-01-08 | 2011-03-24 | カーディアック ペースメイカーズ, インコーポレイテッド | Impedance measuring apparatus and impedance measuring method using embedded device |
DK2242522T3 (en) | 2008-01-08 | 2012-06-18 | Bluesky Medical Group Inc | Wound treatment with uninterrupted variable pressure and methods for controlling it |
EP2257320A2 (en) | 2008-03-12 | 2010-12-08 | Bluesky Medical Group Inc. | Negative pressure dressing and method of using same |
US20110160832A1 (en) * | 2009-12-30 | 2011-06-30 | Amit Cohen | Electrical Metering of Active Fixation Lead Extension |
US8750997B2 (en) * | 2009-12-31 | 2014-06-10 | Cardiac Pacemakers, Inc. | Implantable medical device including isolation test circuit |
US8798746B2 (en) * | 2010-01-15 | 2014-08-05 | Cardiac Pacemakers, Inc. | Automatic mechanical alternans detection |
JP5525655B2 (en) * | 2010-06-29 | 2014-06-18 | カーディアック ペースメイカーズ, インコーポレイテッド | Lead wire movement detection by cable microphone effect |
JP5819957B2 (en) | 2010-07-01 | 2015-11-24 | カーディアック ペースメイカーズ, インコーポレイテッド | Treatment circuit protection in implantable medical devices |
US9014807B2 (en) | 2010-12-20 | 2015-04-21 | Cardiac Pacemakers, Inc. | Lead fault detection for implantable medical device |
ITMI20111177A1 (en) * | 2011-06-28 | 2012-12-29 | St Microelectronics Srl | METHOD AND DEVICE FOR MEASURING THE ELECTRICAL IMPEDANCE OF BIOLOGICAL FABRICS |
WO2014018592A1 (en) | 2012-07-25 | 2014-01-30 | Cardiac Pacemakers, Inc. | Electrode displacement detection |
US9060745B2 (en) | 2012-08-22 | 2015-06-23 | Covidien Lp | System and method for detecting fluid responsiveness of a patient |
US8731649B2 (en) | 2012-08-30 | 2014-05-20 | Covidien Lp | Systems and methods for analyzing changes in cardiac output |
US9357937B2 (en) | 2012-09-06 | 2016-06-07 | Covidien Lp | System and method for determining stroke volume of an individual |
US9241646B2 (en) | 2012-09-11 | 2016-01-26 | Covidien Lp | System and method for determining stroke volume of a patient |
US20140081152A1 (en) | 2012-09-14 | 2014-03-20 | Nellcor Puritan Bennett Llc | System and method for determining stability of cardiac output |
US8977348B2 (en) | 2012-12-21 | 2015-03-10 | Covidien Lp | Systems and methods for determining cardiac output |
US20140343448A1 (en) * | 2013-05-15 | 2014-11-20 | Zephyr Technology Corporation | Two-electrode, impedance-based respiration determination |
US9248294B2 (en) | 2013-09-11 | 2016-02-02 | Medtronic, Inc. | Method and apparatus for optimization of cardiac resynchronization therapy using vectorcardiograms derived from implanted electrodes |
JP2019527566A (en) | 2016-05-13 | 2019-10-03 | スミス アンド ネフュー ピーエルシーSmith & Nephew Public Limited Company | Wound monitoring and treatment device using sensor |
US10272248B2 (en) | 2016-05-31 | 2019-04-30 | Medtronic, Inc. | Electrogram-based control of cardiac resynchronization therapy |
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WO2018162732A1 (en) | 2017-03-09 | 2018-09-13 | Smith & Nephew Plc | Apparatus and method for imaging blood in a target region of tissue |
JP7235673B2 (en) | 2017-04-11 | 2023-03-08 | スミス アンド ネフュー ピーエルシー | Component placement and stress relief for sensor-enabled wound dressings |
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US10610296B2 (en) * | 2017-05-31 | 2020-04-07 | Biosense Webster (Israel) Ltd. | Cardiac electrophysiology machine including catheter stability while estimating impedance drop |
CA3066073A1 (en) | 2017-06-23 | 2018-12-27 | Smith & Nephew Plc | Positioning of sensors for sensor enabled wound monitoring or therapy |
GB201804502D0 (en) | 2018-03-21 | 2018-05-02 | Smith & Nephew | Biocompatible encapsulation and component stress relief for sensor enabled negative pressure wound therapy dressings |
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CA3072006A1 (en) | 2017-08-10 | 2019-02-14 | Smith & Nephew Plc | Positioning of sensors for sensor enabled wound monitoring or therapy |
GB201718870D0 (en) | 2017-11-15 | 2017-12-27 | Smith & Nephew Inc | Sensor enabled wound therapy dressings and systems |
JP2020533093A (en) | 2017-09-10 | 2020-11-19 | スミス アンド ネフュー ピーエルシーSmith & Nephew Public Limited Company | Systems and methods for inspecting encapsulation, as well as components within wound dressings equipped with sensors |
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WO2019096828A1 (en) | 2017-11-15 | 2019-05-23 | Smith & Nephew Plc | Integrated sensor enabled wound monitoring and/or therapy dressings and systems |
EP3849401A1 (en) | 2018-09-12 | 2021-07-21 | Smith & Nephew plc | Device, apparatus and method of determining skin perfusion pressure |
US11697023B2 (en) * | 2020-03-30 | 2023-07-11 | Medtronic, Inc. | Medical device and method for generating modulated high frequency electrical stimulation pulses |
US11272854B1 (en) | 2020-09-02 | 2022-03-15 | Analog Devices International Unlimited Company | Noise cancellation in impedance measurement circuits |
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WO1999052591A1 (en) * | 1998-04-14 | 1999-10-21 | Intermedics Inc. | Implantable cardiac stimulator with physiologic sensor based on mechanical-electric phase relation |
US6076015A (en) * | 1998-02-27 | 2000-06-13 | Cardiac Pacemakers, Inc. | Rate adaptive cardiac rhythm management device using transthoracic impedance |
WO2000045890A1 (en) * | 1999-02-08 | 2000-08-10 | Cardiac Pacemakers, Inc. | Signal processing system using improved transconductance cell |
WO2003071945A1 (en) * | 2002-02-28 | 2003-09-04 | St. Jude Medical Ab | Medical device |
WO2004007019A2 (en) * | 2002-07-12 | 2004-01-22 | Cardiac Pacemakers, Inc. | Minute ventilation sensor with dynamically adjusted excitation current |
US20050080460A1 (en) * | 2003-10-14 | 2005-04-14 | Li Wang | Method and apparatus for monitoring tissue fluid content for use in an implantable cardiac device |
US20070135726A1 (en) * | 2005-12-08 | 2007-06-14 | Shenzhen Mindray Bio-Medical Electronics Co., Ltd. | Method for improving recognition rate of respiratory wave |
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-
2009
- 2009-01-08 JP JP2010542265A patent/JP2011509150A/en active Pending
- 2009-01-08 AT AT09700526T patent/ATE514375T1/en not_active IP Right Cessation
- 2009-01-08 WO PCT/US2009/000095 patent/WO2009089021A2/en active Application Filing
- 2009-01-08 EP EP09700526A patent/EP2240076B1/en active Active
- 2009-01-08 US US12/350,728 patent/US9357944B2/en active Active
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WO2000045890A1 (en) * | 1999-02-08 | 2000-08-10 | Cardiac Pacemakers, Inc. | Signal processing system using improved transconductance cell |
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Title |
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YE J ET AL: "ON-LINE RESPIRATORY ARTEFACT REMOVAL VIA ADAPTIVE FIR FILTERS IN RHEOPNEUMOGRAPHIC MEASUREMENT", MEDICAL AND BIOLOGICAL ENGINEERING AND COMPUTING, SPRINGER, HEILDELBERG, DE, vol. 32, no. 6, 1 November 1994 (1994-11-01), pages 620 - 624, XP000598169, ISSN: 0140-0118 * |
Also Published As
Publication number | Publication date |
---|---|
ATE514375T1 (en) | 2011-07-15 |
EP2240076A2 (en) | 2010-10-20 |
JP2011509150A (en) | 2011-03-24 |
WO2009089021A2 (en) | 2009-07-16 |
EP2240076B1 (en) | 2011-06-29 |
US9357944B2 (en) | 2016-06-07 |
US20090177110A1 (en) | 2009-07-09 |
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