EP1191877A1 - Physiological signal acquisition cable - Google Patents
Physiological signal acquisition cableInfo
- Publication number
- EP1191877A1 EP1191877A1 EP00920284A EP00920284A EP1191877A1 EP 1191877 A1 EP1191877 A1 EP 1191877A1 EP 00920284 A EP00920284 A EP 00920284A EP 00920284 A EP00920284 A EP 00920284A EP 1191877 A1 EP1191877 A1 EP 1191877A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- biological
- display
- signals
- acquisition
- physiological signal
- Prior art date
- Legal status (The legal status 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 status listed.)
- Withdrawn
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/30—Input circuits therefor
- A61B5/301—Input circuits therefor providing electrical separation, e.g. by using isolating transformers or optocouplers
Definitions
- the present invention relates to physiological monitoring of patients and, in particular, to physiological signal acquisition cable which provides real time and/or simultaneous transmission of the acquired signals via a serial RS232 port.
- the foetal heart rate (FHR) is the primary indicator of foetal viability.
- Current methods utilise FHR charts and are based on the detection of the mechanical activity of the heart via active ultrasound devices and interpretation by the clinician or nurse.
- a physiological signal acquisition monitoring apparatus having a bio sensor connected by cable means to an electrically isolated bio acquisition unit including a amplifying and control means which is serially connected by cable means to a display device for displaying in real time the resulting graphically representation of the physiological signal.
- the display device is a notebook PC, a palmtop PC and/or smart panel.
- the physiological signal acquisition cable monitor is used to acquire and display ECG, FECG, or to monitor blood pressure, asthma control, pacemaker monitoring, monitoring oxygen saturation, diabetes measurements, heart sounds and the like.
- the bio sensor is electrodes or other pickup device.
- a portable and multipurpose medical device for biological signals acquisition, display and biological data storage comprising:
- a display and storage device a display and storage device comprising: a first housing; a display screen being provided on the first housing for displaying the acquired data; control means disposed within the first housing to control data acquisition options, storage of the acquired data, and other application specific functions of the medical device;
- a biological signals acquisition module comprising: a second housing; a plurality of biological sensors; an analog circuit to amplify and pre-condition biological signals from the plurality of the biological sensors; a digital circuit for digitizing the biological signal and to send the biological data to said first housing; and
- connector means connecting the first and second housings.
- the connector means is a cable means serially connecting the first and second housings.
- the display device is a notebook PC, a palmtop PC and/or smart panel.
- the physiological signal acquisition monitoring and display device is used to simultaneously acquire and physiological signals from a plurality of sensors measuring at least one of the group including multilead ECG, FECG, EEG, EMG, oximetry, blood pressure whether detected by invasive or non-invasive means, respiration, temperature, phonocardiogram, tokolytic, blood glucose, pCO2, pO2 and pacemaker pulses, and condition the signals and transmit data representing the signals in real time to an input/output port of the display device.
- the circuit means includes an isolated section, a non-isolated section with an isolation barrier therebetween, the isolated section being isolated from the input/output port of the display device. The isolated section receives the signals from the sensors and amplifies and preconditions the signals into data specific to the signal type prior to transmitting the data through the isolation barrier.
- the non-isolated section receives the data transmitted through the isolation barrier and prepares the data for transmission to input/output port of the display device via an input/output interface in the first housing and a cable means to the input/output port of the display device which is a second housing of the apparatus.
- Fig. 1 is a perspective view of a preferred embodiment of the apparatus of the present invention
- Fig. 2 is a block diagram of the apparatus of Fig. 1, and
- Fig. 3 is a block diagram of another preferred embodiment of the apparatus of the present invention.
- the apparatus 10 preferably acquires an ECG and therefore includes electrodes or bio sensor 11 connected by cable 12 to an acquisition unit 13.
- the unit 13 includes a bio amplifier 14 and a control unit 15.
- the acquisition unit 13 is serially connected by cable 16 to a laptop display and storage device 17.
- the acquisition unit 13 acquires the ECG while simultaneously displaying the ECG waveform on the display of the laptop in real time.
- the type of display and software of the display determine the level of cardiac information to be analysed, displayed and/or recorded.
- the cable 16 includes access for a power supply line 18 to the acquisition unit 13 from the laptop, a serial control data line 19 and a output serial data line 20.
- the cable is connected to the laptop via a RS232 serial port 21 which allows the various signals to be acquired and displayed in real time.
- the invention is not limited to acquisition of ECG signals only.
- ECG EEG
- EMG EMG
- oximetry blood pressure whether detected by invasive or non-invasive means, respiration, temperature, phonocardiogram, tokolytic, blood glucose, pCO2, pO2 and pacemaker pulses.
- FIG. 3 A block diagram of another ECG acquisition module 30 is shown in Fig. 3.
- the ECG signal is collected via the sensors 31 and amplified by amplifier 32.
- the amplifier 32 is DC biased by the virtual ground potential produced by a virtual ground generator 33.
- the amplified analogue signal is fed to the input of analogue to digital converter (ADC) 34.
- the ADC 12 has two control inputs (-CS and CLK) and one output (DO). Control signals -CS and CLK are supplied by the display device 17 via its serial port 21, the connector and the cable 16 to a serial port interface 35 of the ECG acquisition module 30.
- the amplified analogue signal is converted into digital ECG data (DO) and sent to the display device 17 via the serial port interface 35 of the ECG acquisition module 30, the cable 16, the connector and internal circuitry of the display and storage device 17.
- DO digital ECG data
- Digital ECG data being stored in the display device 17 are accessible for displaying, calculations and overwriting. Control and data signals flow is defined by the display device 17.
- the ECG amplifier 32 is comprised of a high input impedance front stage voltage follower (Ula, Ulb), instrumentation amplifier U2, high pass filter (C3, R4), second amplification stage Uld and a low pass anti-aliasing filter (R7, C4).
- Front stage voltage followers use popular LMC6464 operational amplifier from National Semiconductors with input current less than InA.
- a high pass filter defines the low end of the frequency band of the acquired ECG signal at 0.05Hz.
- a low pass filter removes high frequency noise on the input of ADC.
- Frequency response of the ECG amplifier for the selected filters values is 0.05Hz - 100Hz.
- 100Hz high end frequency is defined by the selected sample rate of 200Hz is in a compliance with the AAMI/ANSI ECG recommended frequency response standards.
- Instrumentation amplifier INA 126 from Burr-Brown Corporation is configured for a gain of 5.
- the ECG acquisition module 30 uses single positive voltage derived from the display device 17 serial connector.
- AMP_REF voltage VCC/2 generated by the virtual ground generator Ulc.
- Second stage of the amplifier is referenced to AMP_REF as well in order to bring the output signal to the half of ADC reference voltage.
- the gain of second amplifier stage is defined by the values R5 and R6 and set to 151. Overall gain is 755.
Abstract
Description
Claims
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AUPQ0184A AUPQ018499A0 (en) | 1999-05-06 | 1999-05-06 | Physiological signal acquisition apparatus |
AUPQ018499 | 1999-05-06 | ||
AUPQ2257A AUPQ225799A0 (en) | 1999-08-16 | 1999-08-16 | Physiological signal acquisition cable |
AUPQ225799 | 1999-08-16 | ||
PCT/AU2000/000404 WO2000067636A1 (en) | 1999-05-06 | 2000-05-08 | Physiological signal acquisition cable |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1191877A1 true EP1191877A1 (en) | 2002-04-03 |
EP1191877A4 EP1191877A4 (en) | 2003-05-02 |
Family
ID=25646045
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00920284A Withdrawn EP1191877A4 (en) | 1999-05-06 | 2000-05-08 | Physiological signal acquisition cable |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1191877A4 (en) |
JP (1) | JP2002543864A (en) |
CA (1) | CA2373123A1 (en) |
WO (1) | WO2000067636A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6633779B1 (en) * | 2000-11-27 | 2003-10-14 | Science Medicus, Inc. | Treatment of asthma and respiratory disease by means of electrical neuro-receptive waveforms |
US7907992B2 (en) * | 2007-08-08 | 2011-03-15 | General Electric Company | Method and system for pacemaker pulse detection |
CA2782512A1 (en) | 2009-12-02 | 2011-06-09 | Neetour Medical Ltd. | Hemodynamics-based monitoring and evaluation of a respiratory condition |
KR101973784B1 (en) * | 2017-08-25 | 2019-04-30 | 김태완 | Apparatus for assisting the drive of electric wheel chair and electric wheel chair having the same |
WO2020165758A1 (en) * | 2019-02-11 | 2020-08-20 | Universidade Do Porto | Device and method for cardiopathies assessment |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4924875A (en) * | 1987-10-09 | 1990-05-15 | Biometrak Corporation | Cardiac biopotential analysis system and method |
EP0707825A2 (en) * | 1994-10-20 | 1996-04-24 | Hewlett-Packard Company | Flexible patient monitoring system |
WO1998030145A1 (en) * | 1997-01-10 | 1998-07-16 | Micromedical Industries Limited | Universal ecg interface cable |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4858617A (en) * | 1987-09-10 | 1989-08-22 | Ith, Inc. | Cardiac probe enabling use of personal computer for monitoring heart activity or the like |
US5020540A (en) * | 1987-10-09 | 1991-06-04 | Biometrak Corporation | Cardiac biopotential analysis system and method |
US5581369A (en) * | 1992-09-25 | 1996-12-03 | Ralin, Inc. | Apparatus and method for communicating electrocardiographic data to a facsimile machine |
US5899855A (en) * | 1992-11-17 | 1999-05-04 | Health Hero Network, Inc. | Modular microprocessor-based health monitoring system |
EP0601589B1 (en) * | 1992-12-11 | 2000-03-08 | Siemens Medical Systems, Inc. | Transportable modular patient monitor with data acquisition modules |
-
2000
- 2000-05-08 CA CA002373123A patent/CA2373123A1/en not_active Abandoned
- 2000-05-08 EP EP00920284A patent/EP1191877A4/en not_active Withdrawn
- 2000-05-08 JP JP2000616670A patent/JP2002543864A/en active Pending
- 2000-05-08 WO PCT/AU2000/000404 patent/WO2000067636A1/en not_active Application Discontinuation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4924875A (en) * | 1987-10-09 | 1990-05-15 | Biometrak Corporation | Cardiac biopotential analysis system and method |
EP0707825A2 (en) * | 1994-10-20 | 1996-04-24 | Hewlett-Packard Company | Flexible patient monitoring system |
WO1998030145A1 (en) * | 1997-01-10 | 1998-07-16 | Micromedical Industries Limited | Universal ecg interface cable |
Non-Patent Citations (1)
Title |
---|
See also references of WO0067636A1 * |
Also Published As
Publication number | Publication date |
---|---|
CA2373123A1 (en) | 2000-11-16 |
JP2002543864A (en) | 2002-12-24 |
EP1191877A4 (en) | 2003-05-02 |
WO2000067636A1 (en) | 2000-11-16 |
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RIC1 | Information provided on ipc code assigned before grant |
Ipc: 7A 61B 5/04 A Ipc: 7A 61B 5/00 B Ipc: 7A 61B 5/0402 B Ipc: 7A 61B 5/044 B |
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A4 | Supplementary search report drawn up and despatched |
Effective date: 20030313 |
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17Q | First examination report despatched |
Effective date: 20040630 |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20050111 |