WO1994008507B1 - Monitor and method for acquiring and processing electrical signals relating to bodily functions - Google Patents

Monitor and method for acquiring and processing electrical signals relating to bodily functions

Info

Publication number
WO1994008507B1
WO1994008507B1 PCT/US1993/009763 US9309763W WO9408507B1 WO 1994008507 B1 WO1994008507 B1 WO 1994008507B1 US 9309763 W US9309763 W US 9309763W WO 9408507 B1 WO9408507 B1 WO 9408507B1
Authority
WO
WIPO (PCT)
Prior art keywords
signals
monitor
electrical signals
acquiring
stream
Prior art date
Application number
PCT/US1993/009763
Other languages
French (fr)
Other versions
WO1994008507A1 (en
Filing date
Publication date
Priority claimed from US07/961,525 external-priority patent/US5368041A/en
Application filed filed Critical
Priority to CA002146979A priority Critical patent/CA2146979C/en
Priority to AU53702/94A priority patent/AU5370294A/en
Priority to EP93923860A priority patent/EP0665728A4/en
Publication of WO1994008507A1 publication Critical patent/WO1994008507A1/en
Publication of WO1994008507B1 publication Critical patent/WO1994008507B1/en

Links

Abstract

An EEG monitor utilizes a portable acquisition module (14) and a substantially stationary processing module (12). The EEG signals are acquired and converted to an oversampled stream of digital signals by a sigma-delta modulator (64) located in the data acquisition module. The signals are then filtered by a decimation filter (62) located in the processing module. Additional means are also provided to monitor the electrode leads to detect when the leads become unplugged. The monitor provides all power to the data acquisition module over a single twisted line which transmits data as well.

Claims

- -
AMENDED CLAIMS
[received by the International Bureau on 7 April 1994 (07.04.94); original claims 1, 2, 3, 5 and 19 amended; remaining claims unchanged (3 pages)]
1. A monitor for receiving electrical signals from a living body and processing such signals to obtain information relating to a bodily function or organ, said monitor comprising: means for acquiring the electrical signals through one or more electrodes connected to the body, said electrical signals being unfiltered in a preselected bandwidth greater than the bandwidth into which the electrical signals are expected to fall, said means for acquiring being located within a first housing and including a means for receiving the unfiltered electrical signals in analog form and converting the signals into an unfiltered stream of digital signals; means for filtering said stream of digital signals to isolate signals of interest from said stream of digital signals, said means for filtering being located in a second housing separate from a housing in which said means for acquiring is located; means for transmitting said unfiltered electrical signals from said means for acquiring to said means for filtering.
2. The monitor of claim 1 wherein said means for receiving the analog signals is an analog modulator which includes means for outputting signals in a one-bit digital stream.
3. The monitor of claim 2 wherein said modulator further comprises means for outputting said one bit digital stream at a rate greater than twice the rate required by the Nyquist principle.
4. The monitor of claim 1 wherein said means for acquiring is a portable device of a size that fits within a human hand. 5. The monitor of claim 1 further comprising a plurality of units of said means for receiving and converting all located in a single housing.
-28-
17. The monitor for receiving electrical signals from a living body of claim 16 wherein said means for acquiring comprises a transformer which receives said voltage pulse through said means for connecting.
18. The monitor for receiving electrical signals from a living body of claim 16 wherein said means for detecting comprises a comparator which measures said droop after a fixed time interval elapses and compares said mesured droop to a predefined level.
19. A monitor for receiving electrical signals from a living body and processing such signals to obtain information relating to a bodily function or organ, said monitor comprising means for acquiring the electrical signals through one or more electrodes connected to the body, said electrical signals being unfiltered in a preselected bandwidth greater than the bandwidth into which the electrical signals are expected to fall, said means for acquiring being located within a housing and including a means for receiving the unfiltered electrical signals in analog form and converting the signals into an unfiltered stream of one-bit digital signals that is output at a rate greater than twice the rate required by the Nyquist principle; means for filtering said stream of digital signals to isolate signals of interest from said stream of digital signals, said means for filtering including means for downsampling said stream of digital signals; means for transmitting said unfiltered electrical signals from said means for acquiring to said means for filtering.
PCT/US1993/009763 1992-10-15 1993-10-13 Monitor and method for acquiring and processing electrical signals relating to bodily functions WO1994008507A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CA002146979A CA2146979C (en) 1992-10-15 1993-10-13 Monitor and method for acquiring and processing electrical signals relating to bodily functions
AU53702/94A AU5370294A (en) 1992-10-15 1993-10-13 Monitor and method for acquiring and processing electrical signals relating to bodily functions
EP93923860A EP0665728A4 (en) 1992-10-15 1993-10-13 Monitor and method for acquiring and processing electrical signals relating to bodily functions.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/961,525 US5368041A (en) 1992-10-15 1992-10-15 Monitor and method for acquiring and processing electrical signals relating to bodily functions
US07/961,525 1992-10-15

Publications (2)

Publication Number Publication Date
WO1994008507A1 WO1994008507A1 (en) 1994-04-28
WO1994008507B1 true WO1994008507B1 (en) 1994-05-11

Family

ID=25504586

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1993/009763 WO1994008507A1 (en) 1992-10-15 1993-10-13 Monitor and method for acquiring and processing electrical signals relating to bodily functions

Country Status (5)

Country Link
US (2) US5368041A (en)
EP (2) EP0738496A1 (en)
AU (1) AU5370294A (en)
CA (1) CA2146979C (en)
WO (1) WO1994008507A1 (en)

Families Citing this family (106)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5678547A (en) * 1988-12-22 1997-10-21 Biofield Corp. Method and apparatus for screening or sensing bodily conditions using DC biopotentials
DE4329898A1 (en) * 1993-09-04 1995-04-06 Marcus Dr Besson Wireless medical diagnostic and monitoring device
US5542054A (en) * 1993-12-22 1996-07-30 Batten, Jr.; George W. Artificial neurons using delta-sigma modulation
CA2189653A1 (en) * 1994-05-26 1995-12-07 Sten Aldestam Measurement system and method
US5678559A (en) * 1995-01-23 1997-10-21 Drakulic; Budimir S. Eeg system
US5649535A (en) * 1995-01-25 1997-07-22 Marquette Electronics, Inc. Blood pressure measuring method and apparatus
US5813404A (en) * 1995-10-20 1998-09-29 Aspect Medical Systems, Inc. Electrode connector system
US5792138A (en) * 1996-02-22 1998-08-11 Apollo Camera, Llc Cordless bipolar electrocautery unit with automatic power control
US5994998A (en) * 1997-05-29 1999-11-30 3Com Corporation Power transfer apparatus for concurrently transmitting data and power over data wires
US6032065A (en) * 1997-07-21 2000-02-29 Nellcor Puritan Bennett Sensor mask and method of making same
US6193668B1 (en) 1997-11-10 2001-02-27 Medacoustics, Inc. Acoustic sensor array for non-invasive detection of coronary artery disease
US6278890B1 (en) 1998-11-09 2001-08-21 Medacoustics, Inc. Non-invasive turbulent blood flow imaging system
US6326979B1 (en) * 1998-01-23 2001-12-04 Ge Medical Systems Information Technologies, Inc. System for and method of calibrating a computer monitor
WO1999053627A1 (en) 1998-04-10 1999-10-21 Chrimar Systems, Inc. Doing Business As Cms Technologies System for communicating with electronic equipment on a network
US6480510B1 (en) 1998-07-28 2002-11-12 Serconet Ltd. Local area network of serial intelligent cells
US6261237B1 (en) 1998-08-20 2001-07-17 Medacoustics, Inc. Thin film piezoelectric polymer sensor
US6167258A (en) * 1998-10-09 2000-12-26 Cleveland Medical Devices Inc. Programmable wireless data acquisition system
US6295466B1 (en) 1999-01-06 2001-09-25 Ball Semiconductor, Inc. Wireless EKG
IE990184A1 (en) * 1999-03-05 2000-09-06 Nabila Ltd A data acquisition circuit
US6360114B1 (en) * 1999-03-25 2002-03-19 Masimo Corporation Pulse oximeter probe-off detector
EP1719449B1 (en) * 1999-03-25 2010-12-22 Masimo Corporation Improved pulse oximeter probe-off detector
GB2349283A (en) * 1999-04-17 2000-10-25 Data Acquisition Systems Ltd Isolated power supply for a peripheral device coupled to a computer
US6956826B1 (en) 1999-07-07 2005-10-18 Serconet Ltd. Local area network for distributing data communication, sensing and control signals
US6430437B1 (en) * 1999-10-27 2002-08-06 Physiometrix, Inc. Module for acquiring electroencephalograph signals from a patient
AU2272301A (en) 1999-12-14 2001-06-25 California Institute Of Technology Neural prosthetic using temporal structure in the local field potential
US7133715B1 (en) 2000-01-07 2006-11-07 Natus Medical Inc. Hearing evaluation device with noise detection and evaluation capability
US6475163B1 (en) 2000-01-07 2002-11-05 Natus Medical, Inc Hearing evaluation device with patient connection evaluation capabilities
US6549616B1 (en) 2000-03-20 2003-04-15 Serconet Ltd. Telephone outlet for implementing a local area network over telephone lines and a local area network using such outlets
US6842459B1 (en) 2000-04-19 2005-01-11 Serconet Ltd. Network combining wired and non-wired segments
US6961303B1 (en) 2000-09-21 2005-11-01 Serconet Ltd. Telephone communication system and method over local area network wiring
US7011410B2 (en) * 2000-11-22 2006-03-14 Eyetect, L.L.C. Method and apparatus for monitoring eye tremor
US6463322B1 (en) * 2001-04-10 2002-10-08 Viasys Healthcare, Inc. Combination referential and differential amplifier for medical signal monitoring
US20020188216A1 (en) * 2001-05-03 2002-12-12 Kayyali Hani Akram Head mounted medical device
EP1395176B1 (en) 2001-06-13 2008-10-15 Compumedics Limited Method for monitoring consciousness
EP1399060B1 (en) * 2001-06-21 2011-04-20 Aspect Medical Systems, Inc. System and method for the detection and removal of radio frequency noise artifact from biopotential signals
US6654633B2 (en) * 2001-11-07 2003-11-25 Neuralynx, Inc. Mobile neurological signal data acquisition system and method
AU2002360407A1 (en) * 2001-11-20 2003-09-02 California Institute Of Technology Neural prosthetic micro system
EP1382369A1 (en) * 2002-07-20 2004-01-21 Schiller AG Device for electrotherapy and method of testing and operating the same
WO2004034883A2 (en) * 2002-10-15 2004-04-29 Medtronic Inc. Synchronization and calibration of clocks for a medical device and calibrated clock
US7198197B2 (en) * 2002-11-05 2007-04-03 Rambus, Inc. Method and apparatus for data acquisition
US20040092801A1 (en) * 2002-11-13 2004-05-13 Budimir Drakulic System for, and method of, acquiring physiological signals of a patient
IL152824A (en) 2002-11-13 2012-05-31 Mosaid Technologies Inc Addressable outlet and a network using same
EP1424637A1 (en) * 2002-11-29 2004-06-02 Instrumentarium Corporation Artifact removal from an electric signal
DE10311840B4 (en) * 2003-03-18 2010-07-29 Hellige, Gerhard, Prof. Dr.med. Method and device for electrical impedance measurement of a body
US7333844B2 (en) * 2003-03-28 2008-02-19 Vascular Control Systems, Inc. Uterine tissue monitoring device and method
US20050004482A1 (en) * 2003-07-01 2005-01-06 Budimir Drakulic Amplified system for determining parameters of a patient
US20050059896A1 (en) * 2003-09-17 2005-03-17 Budimir Drakulic Apparatus for, and method of, determining the condition of a patient's heart
US7206625B2 (en) * 2003-10-23 2007-04-17 Vivosonic Inc. Method and apparatus for the collection of physiological electrical potentials
US7731360B2 (en) * 2003-11-07 2010-06-08 Neuro Kinetics Portable video oculography system
IL159838A0 (en) 2004-01-13 2004-06-20 Yehuda Binder Information device
US20070173732A1 (en) * 2004-01-29 2007-07-26 Elvir Causevic Method and apparatus for wireless brain interface
WO2005092185A2 (en) 2004-03-22 2005-10-06 California Institute Of Technology Cognitive control signals for neural prosthetics
US7212865B2 (en) 2004-05-25 2007-05-01 Philip Cory Nerve stimulator and method
US20050280531A1 (en) * 2004-06-18 2005-12-22 Fadem Kalford C Device and method for transmitting physiologic data
WO2006050325A2 (en) * 2004-10-29 2006-05-11 Worcester Polytechnic Institute System and method for multi-channel electrophysiologic signal data acquisition
US7395109B2 (en) * 2004-12-09 2008-07-01 Signalife, Inc. System for, and method of, monitoring heartbeats of a patient
US7299083B2 (en) 2004-12-09 2007-11-20 Signalife, Inc. Electrode for, and method of, indicating signal characteristics at particular positions in a patient's body
US7797040B2 (en) * 2004-12-16 2010-09-14 California Institute Of Technology Prosthetic devices and methods and systems related thereto
WO2006094109A1 (en) 2005-03-01 2006-09-08 Masimo Laboratories, Inc. Noninvasive multi-parameter patient monitor
EP1883450B1 (en) 2005-04-29 2009-12-09 Medtronic, Inc. Distributed lead functionality testing
US9743878B2 (en) * 2005-04-29 2017-08-29 Medtronic, Inc. Event-based lead impedance monitoring
EP1952291A1 (en) * 2005-10-14 2008-08-06 Medicalgorithmics Sp. Z.O.O. Method, device and system for lead-limited electrocardiography (ecg) signal analysis
US8818496B2 (en) * 2005-10-14 2014-08-26 Medicalgorithmics Ltd. Systems for safe and remote outpatient ECG monitoring
CN101365380A (en) * 2005-12-01 2009-02-11 莱克西克医疗技术有限公司 Systems and methods for analyzing and assessing depression and other mood disorders using electroencephalographic (eeg) measurements
EP1988827A4 (en) * 2006-02-22 2010-08-04 Brainscope Oy A method and a device for adapting eeg measurement signals
US20080275755A1 (en) * 2006-04-21 2008-11-06 Brustein Richard C System for, and method of, providing a sequence of content segments and advertisements to a user and recommending product purchases to the user on the basis of the user's behavioral characteristics
US8265723B1 (en) 2006-10-12 2012-09-11 Cercacor Laboratories, Inc. Oximeter probe off indicator defining probe off space
US8374665B2 (en) 2007-04-21 2013-02-12 Cercacor Laboratories, Inc. Tissue profile wellness monitor
US9655515B2 (en) * 2008-04-08 2017-05-23 Neuro Kinetics Method of precision eye-tracking through use of iris edge based landmarks in eye geometry
US8585609B2 (en) * 2008-10-09 2013-11-19 Neuro Kinetics, Inc. Quantitative, non-invasive, clinical diagnosis of traumatic brain injury using simulated distance visual stimulus device for neurologic testing
US10398309B2 (en) 2008-10-09 2019-09-03 Neuro Kinetics, Inc. Noninvasive rapid screening of mild traumatic brain injury using combination of subject's objective oculomotor, vestibular and reaction time analytic variables
US9039631B2 (en) 2008-10-09 2015-05-26 Neuro Kinetics Quantitative, non-invasive, clinical diagnosis of traumatic brain injury using VOG device for neurologic testing
US20100314149A1 (en) * 2009-06-10 2010-12-16 Medtronic, Inc. Hermetically-sealed electrical circuit apparatus
US8172760B2 (en) 2009-06-18 2012-05-08 Medtronic, Inc. Medical device encapsulated within bonded dies
AU2010286595A1 (en) * 2009-08-28 2012-02-23 NEBA Health, LLC. Systems and methods to identify a subgroup of ADHD at higher risk for complicating conditions
US9839381B1 (en) 2009-11-24 2017-12-12 Cercacor Laboratories, Inc. Physiological measurement system with automatic wavelength adjustment
DE112010004682T5 (en) 2009-12-04 2013-03-28 Masimo Corporation Calibration for multi-level physiological monitors
US8797714B2 (en) * 2009-12-22 2014-08-05 Mindray Ds Usa, Inc. Cables for patient monitoring and related systems with integrated front end
EP2621333B1 (en) 2010-09-28 2015-07-29 Masimo Corporation Depth of consciousness monitor including oximeter
US8666505B2 (en) 2010-10-26 2014-03-04 Medtronic, Inc. Wafer-scale package including power source
US8424388B2 (en) 2011-01-28 2013-04-23 Medtronic, Inc. Implantable capacitive pressure sensor apparatus and methods regarding same
CN103460053B (en) 2011-04-15 2016-01-27 深圳迈瑞生物医疗电子股份有限公司 Body fluid work station and on-line loaded Reagent Protocol, system
CN103781402A (en) * 2011-09-09 2014-05-07 德尔格医疗系统有限公司 Systems and methods of cable management
US9402554B2 (en) 2011-09-23 2016-08-02 Nellcor Puritan Bennett Ireland Systems and methods for determining respiration information from a photoplethysmograph
US9675274B2 (en) * 2011-09-23 2017-06-13 Nellcor Puritan Bennett Ireland Systems and methods for determining respiration information from a photoplethysmograph
US9119597B2 (en) 2011-09-23 2015-09-01 Nellcor Puritan Bennett Ireland Systems and methods for determining respiration information from a photoplethysmograph
US9693709B2 (en) 2011-09-23 2017-07-04 Nellcot Puritan Bennett Ireland Systems and methods for determining respiration information from a photoplethysmograph
US9693736B2 (en) 2011-11-30 2017-07-04 Nellcor Puritan Bennett Ireland Systems and methods for determining respiration information using historical distribution
US8808179B1 (en) 2012-08-06 2014-08-19 James Z. Cinberg Method and associated apparatus for detecting minor traumatic brain injury
US9113805B2 (en) 2013-03-04 2015-08-25 Mortara Instrument, Inc. Impedance measurement system
WO2016057553A1 (en) 2014-10-07 2016-04-14 Masimo Corporation Modular physiological sensors
CN104586389A (en) * 2014-12-31 2015-05-06 苏州原点工业设计有限公司 Brain wave amplifier
US10080898B2 (en) 2015-05-29 2018-09-25 Medtronic, Inc. Simultaneous physiological sensing and stimulation with saturation detection
US10434308B2 (en) * 2015-05-29 2019-10-08 Medtronic, Inc. Impedance matching and electrode conditioning in patient interface systems
US11290203B2 (en) * 2016-08-30 2022-03-29 Sean Iwasaki Circuitry for remote optical communications devices and methods utilizing same
US11444870B2 (en) * 2015-10-20 2022-09-13 Sean Iwasaki Circuitry for demarcation devices and methods utilizing same
US20220283054A1 (en) * 2016-08-30 2022-09-08 Sean Iwasaki Circuitry for Remote Optical Communications Devices and Methods Utilizing Same
CA3034896A1 (en) * 2016-08-30 2018-03-08 Sean Iwasaki Multi-functional circuity for communications networks and methods and devices utilizing same
CN108888262B (en) * 2018-08-04 2023-08-04 福州大学 Alternating current lead falling detection circuit and method for double-electrode electrocardio acquisition system
KR20210081998A (en) * 2019-12-24 2021-07-02 삼성전자주식회사 Method for processing biometric signal, detachable wearable electronic device and storage medium therefor
US11451366B2 (en) * 2020-01-16 2022-09-20 Mediatek Inc. Lead-on detection circuitry of biopotential acquisition system
WO2021202213A2 (en) 2020-03-30 2021-10-07 Zoll Medical Corporation Medical device system and hardware for sensor data acquisition
CN112336351A (en) * 2020-10-26 2021-02-09 北京大学深圳研究生院 Method and system for evaluating illness state based on human body surface electric signals
CN113576479A (en) * 2021-07-01 2021-11-02 电子科技大学 Emotion detection and regulation system based on electroencephalogram
US11399762B1 (en) 2021-08-05 2022-08-02 Starcat LLC Modular electroencephalograph (EEG) system
JP2024523977A (en) * 2021-08-05 2024-07-05 スターキャット エルエルシー Modular Electroencephalography (EEG) System

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3872437A (en) * 1972-12-12 1975-03-18 Robertshaw Controls Co Supervisory control system
US3859988A (en) * 1973-04-30 1975-01-14 Beckman Instruments Inc Open lead testing system for eeg
US3997733A (en) * 1975-05-01 1976-12-14 Browne-Davies Electronic Corporation Intrinsically safe communication systems
US4331161A (en) * 1979-05-17 1982-05-25 Healthdyne, Inc. Patient sensor continuity detector
US4244376A (en) * 1980-02-08 1981-01-13 Fisher Charles B Measurement of evoked nervous system potentials
US4399824A (en) * 1981-10-05 1983-08-23 Air-Shields, Inc. Apparatus for detecting probe dislodgement
US4399823A (en) * 1981-10-05 1983-08-23 Air-Shields, Inc. Apparatus for detecting probe dislodgement
DE3246473A1 (en) * 1982-12-15 1984-06-20 Siemens AG, 1000 Berlin und 8000 München CIRCUIT ARRANGEMENT FOR DETECTING AN ELECTRICAL LINE INTERRUPT
US4557270A (en) * 1983-08-23 1985-12-10 New York University Electroencephalographic system for intra-operative open-heart surgery
US4598396A (en) * 1984-04-03 1986-07-01 Itt Corporation Duplex transmission mechanism for digital telephones
US4681111A (en) * 1985-04-05 1987-07-21 Siemens-Pacesetter, Inc. Analog and digital telemetry system for an implantable device
BE904825A (en) * 1986-05-27 1986-09-15 Delimer Sa MULTICHANNEL CAPTATION METHOD AND APPARATUS FOR DIGITAL RECORDING OF SLOW ELECTROPHYSIOLOGICAL SIGNALS AND RELIABLE AMPLITUDE.
US4967038A (en) * 1986-12-16 1990-10-30 Sam Techology Inc. Dry electrode brain wave recording system
US5038782A (en) * 1986-12-16 1991-08-13 Sam Technology, Inc. Electrode system for brain wave detection
US4803996A (en) * 1987-09-28 1989-02-14 Nippon Colin Co., Ltd. Cardiovascular monitor
US4917099A (en) * 1988-07-13 1990-04-17 Physio-Control Corporation Method and apparatus for differential lead impedance comparison
US5168874A (en) * 1989-02-15 1992-12-08 Jacob Segalowitz Wireless electrode structure for use in patient monitoring system
US4919143A (en) * 1989-06-14 1990-04-24 Ayers Margaret E Electroencephalic neurofeedback apparatus and method for bioelectrical frequency inhibition and facilitation

Similar Documents

Publication Publication Date Title
WO1994008507B1 (en) Monitor and method for acquiring and processing electrical signals relating to bodily functions
CA2146979A1 (en) Monitor and method for acquiring and processing electrical signals relating to bodily functions
US20040249302A1 (en) Methods and systems for processing of brain signals
US4858617A (en) Cardiac probe enabling use of personal computer for monitoring heart activity or the like
US8068916B2 (en) Pure digital medical amplifier for digitally acquiring, conditioning, storing, and transferring clinical and non-clinical biomedical signals
CA2191594A1 (en) Cerebral biopotential analysis system and method
WO2002005700A3 (en) Wireless electrocardiograph system and method
US6421558B1 (en) Uterine activity monitor and method of the same
CN105030230B (en) Electrocardial signal acquisition device, electrocardiogram processing system and processing method
CA2408520A1 (en) System for detecting brain activity
US5233999A (en) Electromyograph with data transmission comprising no metallic conductors
CN1243510C (en) Method and apparatus for detecting and remote metering lead wire fault in biomedical system
CN110840454A (en) Electroencephalogram signal acquisition device and method
EP1972268A1 (en) Method of compressing electrocardiogram data and electrocardiogram telemetry system using the same
EP0198924A4 (en) Signal processing system.
CN117731292A (en) Portable multichannel electromyographic signal acquisition system and wearable equipment
CN216876378U (en) Physiological electric signal acquisition system
EP0277067A3 (en) Data compression apparatus and method for data recorder with waveform envelope display
CN111569265B (en) Low-power-consumption high-system-integration-level body surface pacemaker signal detection system and detection method
Magotra et al. Lossless compression of electroencephalographic (EEG) data
CN211089601U (en) Electroencephalogram signal sampling device
lonescu A Microcontroller-Based Fast Evoked Potentials Recorder
JPH06506840A (en) Apparatus and method for an implantable cardiac pacemaker with a multifunctional electrode with potential restoration
CN109222957B (en) Automatic ECG measuring system
KR20010083802A (en) Bio-Signal Modem System