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WO2022058943A1 - Dispositif portable non résonnant et procédé de mesure d'activité électrique cardiaque - Google Patents

Dispositif portable non résonnant et procédé de mesure d'activité électrique cardiaque Download PDF

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Publication number
WO2022058943A1
WO2022058943A1 PCT/IB2021/058481 IB2021058481W WO2022058943A1 WO 2022058943 A1 WO2022058943 A1 WO 2022058943A1 IB 2021058481 W IB2021058481 W IB 2021058481W WO 2022058943 A1 WO2022058943 A1 WO 2022058943A1
Authority
WO
WIPO (PCT)
Prior art keywords
electrical activity
cardiac electrical
patient
microcontroller unit
data
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.)
Ceased
Application number
PCT/IB2021/058481
Other languages
English (en)
Inventor
Rajat Jain
Nitin Chandola
Saurabh Badola
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sunfox Technologies Private Ltd
Original Assignee
Sunfox Technologies Private Ltd
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 Sunfox Technologies Private Ltd filed Critical Sunfox Technologies Private Ltd
Publication of WO2022058943A1 publication Critical patent/WO2022058943A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
    • A61B5/25—Bioelectric electrodes therefor
    • A61B5/271—Arrangements of electrodes with cords, cables or leads, e.g. single leads or patient cord assemblies
    • 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
    • A61B5/25—Bioelectric electrodes therefor
    • A61B5/279—Bioelectric electrodes therefor specially adapted for particular uses
    • A61B5/28—Bioelectric electrodes therefor specially adapted for particular uses for electrocardiography [ECG]
    • 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
    • A61B5/303—Patient cord assembly, e.g. cable harness
    • 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
    • A61B5/307—Input circuits therefor specially adapted for particular uses
    • A61B5/308—Input circuits therefor specially adapted for particular uses for electrocardiography [ECG]
    • 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]
    • A61B5/332—Portable devices specially adapted therefor
    • 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
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2560/00—Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
    • A61B2560/04—Constructional details of apparatus
    • A61B2560/0443—Modular apparatus

Definitions

  • the present invention provides a noiseless portable device and method for cardiac electrical activity measurement.
  • the present invention in particular describes a portable device and method for measuring the cardiac electrical activity of a patient, for reducing the amount of noise in the measured data and for transmitting the measured cardiac electrical activity to a user-interface device for user interpretation.
  • Cardiac electrical activity in patients is conventionally measured by an electrocardiograph, wherein at least 3 electrodes are placed in a particular order on a patient’s torso to measure the cardiac electrical activity of a patient.
  • the cardiac electrical activity is recorded on an electrocardiograph and is visually depicted as a wave with peaks in the wave corresponding to electrical activity in the heart of patients.
  • Conventional electrocardiographs produce electrocardiograms and the electrocardiographs weigh eight to ten kilograms on average, with very limited mobility outside of the environments for which they are designed. Additionally, electrocardiographs require constant electric power to operate and it is standard procedure to keep an electrocardiograph fully charged at all times to avoid erroneous readings of the cardiac electrical activity of a patient.
  • Handheld electrocardiographs monitor the cardiac electrical activity of a patient and are easy to carry due to their light weight. Handheld electrocardiographs however function with an internal battery that is susceptible to discharging, which in turn may lead to faulty electrocardiograms if the battery of the handheld electrocardiograph depletes during an electrocardiography. Further, handheld electrocardiographs do not possess on-device diagnostic tools to enable the handheld electrocardiographs to automatically generate reports highlighting medical anomalies found in the cardiac electrical activity of a patient. The diagnostic services are usually only carried out by doctors and physicians, amounting to additional time and effort spent by a patient. Further, conventional handheld electrocardiographs produce electrocardiograms that are often unreliable due to poor noise-suppression technology incorporated in the machines.
  • the present invention overcomes the drawbacks of the prior arts by providing a noiseless portable device and method for cardiac electrical activity measurement.
  • the present invention comprises an input module for measuring the cardiac electrical activity of a patient which further comprises at least three lead cables attached to a patient by electrode pads detachably attached to the ends of the three lead cables.
  • the lead cables are connected to an input port, which is connected to a microcontroller unit for processing the cardiac electrical activity of a patient.
  • the microcontroller unit converts the measured analog cardiac electrical activity to digital cardiac electrical activity data.
  • An output module transmits the digital cardiac electrical activity data and device interpretations to an external userinterface device.
  • the device additionally comprises an electromagnetic interference shield (EMI shield) placed in the vicinity of the microcontroller unit and output module for further noise reduction. Further, the device comprises an enclosure for securely housing the microcontroller unit, output module and EMI shield.
  • EMI shield electromagnetic interference shield
  • the status and operability conditions of the device are authenticated on an external user-interface device, which is connected to the device through the output module.
  • pre-defined cardiac electrical activity test procedures are unlocked for measuring the cardiac electrical activity of a patient.
  • the user may then select a cardiac electrical activity test procedure from the user- interface device.
  • the three lead cables are attached to the torso region of a patient, wherein measurement of cardiac electrical activity of a patient is based on the principle of Einthoven’s triangle.
  • the microcontroller unit processes the information and interprets the digital cardiac electrical activity data using one or more cardiac electrical activity diagnostic algorithms.
  • the device generates and transmits a test report to an external user-interface device through the output module once the cardiac electrical activity test procedure is completed.
  • the present invention overcomes the drawbacks which are encountered in the present-day electrocardiogram devices.
  • the present invention enables measurement of cardiac electrical activity in a noiseless manner, thus greatly enhancing the accuracy of test reports.
  • the present invention provides a portable device for cardiac electrical activity measurement, enabling measurement of cardiac electrical activity of patients in situations where electrocardiogram machines are not readily available.
  • the present invention additionally does not require internal battery power to operate, making the device easy to use and lightweight.
  • the simplicity of operation of the present invention further enables it to be used by anyone without any prior knowledge of operation of electrocardiogram machines.
  • the present invention provides insights computed using algorithms to generate reports on the test results of the present invention, thus saving both time and effort which would have otherwise been used to consult a physician.
  • FIG 1 illustrates an isometric view of a device for noiseless and portable cardiac electrical activity measurement.
  • FIG 2 illustrates the front view of the three lead cables.
  • FIG 3 illustrates a process flow diagram of a method for cardiac electrical activity measurement.
  • the present invention provides a noiseless portable device and method for cardiac electrical activity measurement.
  • the device comprises an input module that further comprises at least three leads cables and an input port for measuring the cardiac electrical activity in analog form of a patient.
  • the device further comprises a microcontroller unit for denoising, amplifying and converting the measured analog cardiac electrical activity to digital cardiac electrical activity data.
  • the microcontroller unit also comprises diagnostic algorithms for interpretation of digital cardiac electrical activity data.
  • the device further comprises an output module for transmitting the digital cardiac electrical activity data to an external user-interface device.
  • An electromagnetic interference shield (EMI shield) is placed in the vicinity of the microcontroller unit within an enclosure.
  • EMI shield electromagnetic interference shield
  • FIG 1 illustrates a device for noiseless and portable cardiac electrical activity measurement.
  • the device (100) comprises an input module (101) for measuring the cardiac electrical activity of a patient, the input module (101) further comprising at least three lead cables (101a, 101b, 101c).
  • the three lead cables (101a, 101b, 101c) are connected between the device (100) and a patient whose cardiac electrical activity is to be measured.
  • the input port (102) of the device (100) may be a round connector for accepting a 3.5-millimeter connector jack.
  • the three lead cables (101a, 101b, 101c) may comprise a 3.5-millimeter connector jack for connection to the input port (102) of the device (100).
  • FIG 2 illustrates the front view of the three lead cables (101a, 101b, 101c).
  • the three lead cables (101a, 101b, 101c) are connected to the device (100) through an input port (102) and are attached to a patient by electrode pads which are detachably affixed to the ends of the three lead cables (101a, 101b, 101c) that are then placed on the torso region of a patient.
  • the three lead cables (101a, 101b, 101c) measure the cardiac electrical activity of a patient in analog form and transmit the measured analog cardiac electrical activity to the input port (102) of the device (100).
  • the device (100) further comprises a microcontroller unit (103) that is connected to the input port (102) for receiving the measured analog cardiac electrical activity of a patient.
  • the microcontroller unit (103) comprises at least one noise filter (103a) for denoising the measured analog cardiac electrical activity for reducing the amount of undesirable data noise in the device (100).
  • the noise filter (103a) may additionally be detached from the device (100) for altering the filtration abilities of the noise filter (103a). Sometimes, the noise filter (103a) may discard any data below a certain pre-defined threshold of input data, wherein the pre- defined threshold may be altered by detaching the noise filter (103a) from the device (100).
  • the microcontroller unit (103) further comprises an amplification unit (103b) for amplifying the measured analog cardiac electrical activity of a patient.
  • the amplification unit (103b) amplifies the measured analog cardiac electrical activity of a patient to enable easier interpretation and processing of the measured analog cardiac electrical activity.
  • the amplification unit (103b) may be an operational amplifier.
  • the microcontroller unit (103) additionally comprises a data convertor (103c) for conversion of the measured analog cardiac electrical activity of a patient to digital cardiac electrical activity data.
  • the data convertor (103c) converts the data to enable transmission of the cardiac electrical activity of a patient to an external user-interface device such as a mobile phone, tablet, computer and so on and to store the cardiac electrical activity of a patient for interpretation of the digital cardiac electrical activity data.
  • the data convertor (103c) may be an analog-to-digital convertor.
  • the microcontroller unit (103) further comprises a processing unit (103d) for storing cardiac electrical activity diagnostic algorithms, wherein the processing unit (103d) employs the cardiac electrical activity diagnostic algorithms to interpret the digital cardiac electrical activity data of a patient.
  • the cardiac electrical activity diagnostic algorithms enable the device (100) to diagnose certain cardiac dysfunctions based on the digital cardiac electrical activity data of a patient.
  • the processing unit (103d) additionally comprises one or more protocols for a further reduction of undesirable data noise by denoising the digital cardiac electrical activity data.
  • the device (100) additionally comprises an output module (104) connected to the microcontroller unit (103) for transmitting the digital cardiac electrical activity data from the microcontroller unit (103) to an external user-interface device.
  • the output module (104) receives the digital cardiac electrical activity data from the processing unit (103d).
  • the digital cardiac electrical activity data may be cardiac electrical activity of a patient for user interpretation or interpretations and test reports generated by the processing unit (103d).
  • the output module (104) of the device (100) may be a Universal Serial Bus port (USB port) for hassle-free connection of the device (100) with an external user-interface device.
  • USB port Universal Serial Bus port
  • the device (100) also comprises an electromagnetic interference shield (EMI shield) (105) placed in the vicinity of the microcontroller unit (103) and output module (104) for reducing the amount of undesirable data noise in the device (100).
  • EMI shield (105) is constructed from a material that blocks electromagnetic waves and thus prevents any interference of electromagnetic waves present in the vicinity of the device (100), enabling the device (100) to generate relatively noiseless digital cardiac electrical activity data.
  • the input port (102), microcontroller unit (103), output module (104) and EMI shield (105) are securely housed within a durable and robust enclosure (106).
  • the input port (102), microcontroller unit (103) and output module (104) may be mounted on a printed circuit board (PCB).
  • FIG 3 illustrates a process flow diagram of a method for cardiac electrical activity measurement of a patient.
  • the status and operability conditions of the device (100) are authenticated on an external user-interface device in step (201).
  • the device (100) is connected to an external user-interface device through the output module (104), wherein the output module (104) comprises a USB port and a suitable data transmission cable for enabling communication between the device (100) and an external user-interface device.
  • the external userinterface device allows the selection of a cardiac electrical activity test procedure from pre-defined test procedures on the device (100).
  • the information about the cardiac electrical activity test procedures is stored within the processing unit (103d) on the device (100).
  • a cardiac electrical activity test procedure is selected from at least three pre-defined cardiac electrical activity test procedures in step (202).
  • the cardiac electrical activity test procedures selected may be a lead-II test to measure the cardiac electrical activity of a patient at a basic level, an 8-lead test to measure the cardiac electrical activity of a patient at an intermediate level or a 12-lead test to measure the cardiac electrical activity of a patient at an advanced level, based on user preference.
  • the three lead cables (101a, 101b, 101c) are attached to a patient for cardiac electrical activity measurement in step (203).
  • the three lead cables (101a, 101b, 101c) are attached to a patient by electrode pads which are detachably affixed to the ends of the three lead cables (101a, 101b, 101c).
  • the three lead cables (101a, 101b, 101c) are placed on the torso region of a patient based on the principle of Einthoven’s triangle to ensure that the measured analog cardiac electrical activity is accurate.
  • the microcontroller unit (103) processes and interprets the measured analog cardiac electrical activity of a patient in step (204).
  • the interpretation is done by the processing unit (103d) in the microcontroller unit (103) by employing cardiac electrical activity diagnostic algorithms.
  • the cardiac electrical activity diagnostic algorithms analyze parameters of the digital cardiac electrical activity data of a patient such as heart rate, electrical axis intervals including PR, QRS, QT and QTc intervals as well as the ST segment. Analysis of these parameters enables the processing unit (103d) to interpret the data and generate a test report in step (205).
  • the test report along with interpretations by the processing unit (103d) are transmitted to an external user-interface device through the output module (104) of the device (100).
  • the test reports generated may be represented as raw data, visual electrocardiograms or in the form of a heart meter to display the holistic cardiac health of a patient.
  • the present invention overcomes the drawbacks which are encountered in the present-day cardiac electrical measurement systems.
  • the present invention operates on the battery power from an external user-interface device, thus removing the dependency of the device (100) on an internal battery and increasing portability of the device (100). Further, the present invention comprises multiple denoising features to greatly reduce the amount of undesirable data noise in the device (100), thus improving accuracy of test results.
  • the employment of cardiac electrical activity diagnostic algorithms enables the device (100) to quickly and accurately interpret the digital cardiac electrical activity data of a patient to generate test reports outlining possible cardiac abnormalities of a patient. Further, the simplicity of operation of the device (100) enables the device (100) to be used by a person who has no prior medical knowledge.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Surgery (AREA)
  • General Health & Medical Sciences (AREA)
  • Biophysics (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Physics & Mathematics (AREA)
  • Animal Behavior & Ethology (AREA)
  • Pathology (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Cardiology (AREA)
  • Signal Processing (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Physiology (AREA)
  • Psychiatry (AREA)
  • Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)

Abstract

L'invention concerne un dispositif portable non résonnant et un procédé de mesure d'activité électrique cardiaque. Le dispositif (100) comprend un module d'entrée (101) comprenant en outre au moins trois câbles de dérivation (101a, 101b, 101c) et un port d'entrée (102) permettant de mesurer l'activité électrique cardiaque sous forme analogique d'un patient. Le dispositif (100) comprend en outre une unité de microcontrôleur (103) de débruitage, d'amplification et de conversion de l'activité électrique cardiaque analogique mesurée en données d'activité électrique cardiaque numérique. L'unité de microcontrôleur (103) comprend également des algorithmes de diagnostic permettant une interprétation de données d'activité électrique cardiaque numérique. Le dispositif (100) comprend de plus un module de sortie (104) permettant de transmettre les données d'activité électrique cardiaque numérique à un dispositif d'interface utilisateur externe. Un blindage contre les interférences électromagnétiques (105) est placé à proximité de l'unité de microcontrôleur (103) à l'intérieur d'une enceinte (106).
PCT/IB2021/058481 2020-09-19 2021-09-17 Dispositif portable non résonnant et procédé de mesure d'activité électrique cardiaque Ceased WO2022058943A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN202011040621 2020-09-19
IN202011040621 2020-09-19

Publications (1)

Publication Number Publication Date
WO2022058943A1 true WO2022058943A1 (fr) 2022-03-24

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Application Number Title Priority Date Filing Date
PCT/IB2021/058481 Ceased WO2022058943A1 (fr) 2020-09-19 2021-09-17 Dispositif portable non résonnant et procédé de mesure d'activité électrique cardiaque

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016011273A1 (fr) * 2014-07-16 2016-01-21 University Of South Florida Système de vectocardiogramme intégré et procédé d'utilisation
WO2019059752A1 (fr) * 2017-09-19 2019-03-28 Aragon Han Daniel Système, procédé et appareil pour mesurer, classer et déployer l'activité électrique cardiaque

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016011273A1 (fr) * 2014-07-16 2016-01-21 University Of South Florida Système de vectocardiogramme intégré et procédé d'utilisation
WO2019059752A1 (fr) * 2017-09-19 2019-03-28 Aragon Han Daniel Système, procédé et appareil pour mesurer, classer et déployer l'activité électrique cardiaque

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