DE2907570A1 - Continuous measurement of heart beat frequency - using sensors and transmitter strapped to chest and linked to wrist detector through arm - Google Patents

Continuous measurement of heart beat frequency - using sensors and transmitter strapped to chest and linked to wrist detector through arm

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Publication number
DE2907570A1
DE2907570A1 DE19792907570 DE2907570A DE2907570A1 DE 2907570 A1 DE2907570 A1 DE 2907570A1 DE 19792907570 DE19792907570 DE 19792907570 DE 2907570 A DE2907570 A DE 2907570A DE 2907570 A1 DE2907570 A1 DE 2907570A1
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Germany
Prior art keywords
transmitter
signal
person
electrical signal
hand
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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.)
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Application number
DE19792907570
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German (de)
Inventor
Asko Olavi Pietarila
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Individual
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Individual
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Priority to DE19792907570 priority Critical patent/DE2907570A1/en
Publication of DE2907570A1 publication Critical patent/DE2907570A1/en
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/0002Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network
    • A61B5/0004Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network characterised by the type of physiological signal transmitted
    • A61B5/0006ECG or EEG signals
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/02Detecting, 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
    • A61B5/024Detecting, measuring or recording pulse rate or heart rate
    • A61B5/02438Detecting, measuring or recording pulse rate or heart rate with portable devices, e.g. worn by the patient
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/02Detecting, 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
    • A61B5/024Detecting, measuring or recording pulse rate or heart rate
    • A61B5/0245Detecting, measuring or recording pulse rate or heart rate by using sensing means generating electric signals, i.e. ECG signals
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2560/00Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
    • A61B2560/04Constructional details of apparatus
    • A61B2560/0406Constructional details of apparatus specially shaped apparatus housings
    • A61B2560/0412Low-profile patch shaped housings

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Cardiology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Physiology (AREA)
  • Biophysics (AREA)
  • Pathology (AREA)
  • Biomedical Technology (AREA)
  • Veterinary Medicine (AREA)
  • Physics & Mathematics (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)

Abstract

Continuous monitoring of an individual's heart beat frequency using ECG signals collecte by sensors in contact with the chst are transmitted without wires to a detector mounted on the wrist. Two sensos n2) are connected to a transmitter (1) secured to the chest. The signals are frequency modulated and use the transmission path provided by the arm to which the wrist mounted detector is secured together with the ground potential. An alternative version uses an identicla transmitter-receiver arrangement with the interconnecting path provided by both arms and the body.

Description

Verfahren zum kontinuierlichen Messen der HerzschlagfrequenzMethod for continuously measuring the heartbeat rate

Die vorliegende Erfindung bezieht sich auf ein elektronisches Verfahren zum Messen der Herzschlagfrequenz, in welchem der Herzschlag einer Person an Hand des von zwei oder mehreren EKG-Elektroden erhaltenen Signals elektronisch erfasst und einer Sendervorrichtung zugeleitet wird, wo der einzelne Herzschlag elektronisch identifiziert wird, und dem Körper der Person entlang als moduliertes hochfrequentes elektrisches Signal weiter zu einer in der Hand oder am Handgelenk der Person befindlichen Empfängervorriahtung gesandt wird, an welcher die Herzpulsfrequenz abgelesen wird.The present invention relates to an electronic method for measuring the heartbeat rate in which the heartbeat of a person is on hand of the signal received from two or more EKG electrodes is electronically recorded and fed to a transmitter device where the individual heartbeat is electronically identified, and along the person's body as modulated high frequency electrical signal on to one in the person's hand or wrist Receiver device is sent, on which the heart pulse rate is read.

Die Verfahrens erfindung gründet sich auf die Erkenntnis der Möglichkeit zum drahtlosen Uebertragen des entschlüsselten EKG-Signals mit Anwendung des Körpers der betreffenden Person als Signalpfad. Verfahrensgemäss wird das EKG-Signal der Person in Form eines modulierten hochfrequenten elektrischen Signals von einem Körperteil zu einem anderen übertragen, z.B. von der Brust zum Handgelenk. In dem Verfahren wird das hochfrequente elektrische Signal so übertragen, dass der Körper als Signalleiter dient und dass der zur Informationsübermittlung erforderliche geschlossene Stromkreis mit Hilfe die Sender- und Empfängervorrichtungen zusammenkoppelnder Selbstkapazitanzen und Streufelder erzielt wird. Die Signalkopplung vermittels Selbstkapazitanzen lässt sich auch durch die Hände ersetzen, indem man beide Hände als einen geschlossenen Stromkreis herstellende Signalleiter benutzt.The process invention is based on the recognition of the possibility for wireless transmission of the decrypted EKG signal with use of the body the person concerned as a signal path. According to the method, the EKG signal is the Person in the form of a modulated high-frequency electrical signal from a part of the body transferred to another, e.g. from the chest to the wrist. In the process the high-frequency electrical signal is transmitted in such a way that the body acts as a signal conductor and that the closed circuit required for the transmission of information with the aid of self-capacitances coupling the transmitter and receiver devices together and stray fields is achieved. The signal coupling by means of self-capacitances also replace oneself with the hands by having both hands closed as one Circuit establishing signal conductors used.

Die auf dem Verfahren aufbauende Vorrichtungserfindung ist dadurch gekennzeichnet, dass das von an sich bekannten, an der Person befestigten zwei oder mehreren EKG-Elektroden bezogene EKG-Signal elektronisch verstärkt wird und dass mit dem so erfassten Signal das in einer Sendervorrichtung erzeugte hochfrequente elektrische Signal moduliert wird, welches an irgendeine der vorerwähnten Elektroden geschaltet wird, wobei dann das Spannungspotential des Körpers der Person im Verhältnis zum Erdpotential des Senderoszillators der Vorrichtung der obengenannten Modulation gemäss variiert, und dass4diese Schwankung des Spannungspotentials mittels einer in der Hand oder am Handgelenk der betreffenden Person getragenen Empfängervorrichtung erfasst wird. Die Detektion erfolgt mittels eines zur Empfängervorrichtung gehörenden empfindlichen, bandbegrenzten Verstärkers und gründet sich darauf, dass die Selbstkapazitanz des Verstärkers das Erdpotential des Verstärkers an das Erdpotential des Senderoszillators schaltet, wobei sich ein geschlossener Stromkreis ergibt. Mit Rücksicht auf die Sicherheit des Benutzers wird das obengenannte Spannungspotential von einigen Volt Höhe von den übrigen, an den EKG-Verstärker angeschlossenen Elektroden mittels eines Wandlers oder Optoisolators getrennt, womit man die Entstehung einer für die Person u.U. gefährlichen Stromschleife verhindert.The device invention based on the method is thereby characterized in that the two known per se, attached to the person or several EKG electrodes related EKG signal is electronically amplified and that with the signal detected in this way, the high-frequency generated in a transmitter device electrical signal is modulated, which is applied to any of the aforementioned electrodes is switched, then the voltage potential of the person's body in proportion to the earth potential of the transmitter oscillator of the device of the above-mentioned modulation varies according to, and that 4 this fluctuation of the voltage potential by means of a receiver device worn in the hand or wrist of the person concerned is captured. The detection takes place by means of a device belonging to the receiver device sensitive, band-limited amplifier and is based on the fact that the self-capacitance of the amplifier the ground potential of the amplifier to the ground potential of the transmitter oscillator switches, resulting in a closed circuit. With consideration for the The safety of the user will be the above voltage potential of a few volts Height of the other electrodes connected to the EKG amplifier by means of a Transducers or optoisolators separately, which means the emergence of one for the person possibly dangerous current loop prevented.

Eine zweite Ausführungsform der Messapparatur besteht aus mit dem Körper der Versuchsperson verbundenen EKG-Elektroden und einer Sendervorrichtung sowie aus einer in der Hand oder am Handgelenk getragenen Empfängervorrichtung. Das EKG-modulerte elektrische Signal wird zwischen zwei EKG-Elektroden geschaltet, in welcher Weise sich ein Herzpulsmesser zum Tragen am Handgelenk oder in der Hand ausführen lässt, zu dem ein bandbegrenzter Signalverstärker und eintPulszähl-Logik gehören. Das Erdpotential des Signalverstärkèrs in der Empfängervorrichtung ist an die eine Hand z.B. über das zur Vorrichtung gehörende Armband geschaltet, und man berührt den Eingangspol des Verstärkers mit der anderen, als Signalleiter dienenden Hand, wobei dann -die den Herzschlägen entsprechende Sendung unmittelbar mit der Anzeigevorrichtung wahrnehmbar und ausqebbär ist. Das in den Körper eingeleitete hochfrequente elektrische Signal'muss# in diesem Fall von einem Oszillator mit hoher Output-Impedanz aufgescháltet werden und die Signalampltiude muss gering sein, um die Sicherheit des Benutzers nicht zu gefährden.A second embodiment of the measuring apparatus consists of with the Test subject's body connected to EKG electrodes and a transmitter device as well as from a hand-held or wrist-worn receiving device. The EKG-modulated electrical signal is switched between two EKG electrodes, how a heart rate monitor can be worn on the wrist or in the hand to which a band-limited signal amplifier and a pulse counting logic belong. The ground potential of the signal amplifier in the receiving device is connected to one hand, e.g. via the bracelet belonging to the device, and one touches the input pole of the amplifier with the other one serving as a signal conductor Hand, then -the program corresponding to the heartbeats immediately with the Display device is perceptible and understandable. That introduced into the body high-frequency electrical signal must in this case be from an oscillator with high Output impedance must be switched on and the signal amplitude must be low not to endanger the safety of the user.

Ein besseres Verständnis der Brfind~ng laßt sich aus den folgenden Zeichnungen gewinnen. Es zeigen: Fig. 1 einen Sender 1, der an die Brust des Patienten angeschlossen ist, EKG-Eiektroden 2 des Senders, einen Empfänger 3 an dem Handgelenk des Patienten und eine Empfängerelektrode 4 des Empfängers, welche das Handgelenk berührt, und den Körper 5, der als eine Hochfrequenzsignalleitung wirkt0 Fig. 2 zeigt eine technische Ausfi~hrung der Erfindung, und zwar ein Blockschema einer Signalleitung zwischen dem Sender 1 und dem Empfänger 3 für ein Hochfrequenzsignal. Der menschliche Körper 5 wirkt als eine Signalleitung, und eine weitere Signalleitung ist vorgesehen durch die Selbstkapazitanzen 6 des Empfängers und des Senders, welche sie mit einer gemeinsamen virtuellen Masse 7 verbinden.A better understanding of the finding can be obtained from the following Win drawings. They show: FIG. 1 a transmitter 1 which is attached to the patient's chest is connected, EKG electrodes 2 of the transmitter, a receiver 3 on the wrist of the patient and a receiver electrode 4 of the receiver covering the wrist touches, and the body 5, which acts as a high frequency signal line 0 Fig. 2 shows a technical embodiment of the invention, namely a block diagram of a Signal line between the transmitter 1 and the receiver 3 for a high frequency signal. The human body 5 functions as a signal line and another signal line is provided by the self-capacitances 6 of the receiver and the transmitter, which connect them to a common virtual ground 7.

Fig. 3 zeigt eine weitere technische Ausführung der Erfindung.Fig. 3 shows a further technical embodiment of the invention.

Es ist ein Signalweg zwischen dem Sender 1 und dem Empfänger 3 für ein Hochfrequenzsignal in Form eines Blocksohemas dargestellt. Die beiden Zweige des Signal wegs werden von zwei Teilen des Körpers gebildet, beispielsweise von den beiden Härten eines Patienten. It is a signal path between the transmitter 1 and the receiver 3 for a high-frequency signal shown in the form of a block theme. The two branches of the signal path are formed by two parts of the body, for example by the two hardships of a patient.

Claims (3)

Patentansprüche Verfahren zur kontinuierlichen Messung der Herzschlagfrequenz, bei welchem das EKG-Signal einer Person am Brustkorb elektronisch gemessen und identifiziert wird und Von einer Sendervorrichtung zu einem am Handgelenk oder in der Hand getragenen Messinstrumentteil gesandt wird, dadurch gekennzeichnet, dass das detektierte Herzpulssignal ohne getrennte äussere Signalleiter zu diner in der Hand oder am Handgelenk der gleichen Person getragenen, mit Hilfe einer Elektrode an die Hand angeschalteten Empfängervorrichtung gesandt wird unter Verwendung des Körpers als Signalleiter, indem das hochfrequente EKG-modulierte elektrische Signal der Sendervorrichtung mittels einer EKG-Elektrode an den Körper der Person geschaltet wird, wobei dann dieses hochfrequente ele trische Signal durch den Körper und die Hand der Person hindurch sowie über die die Sender- und Empfängervorrichtungen üntereinander zusammenkoppelnden tige»apazitanzen und Streufelder übertragen wird und elektronisch mittels der am Handgelenk oder in der Hand getragenen Empfängervorrichtung erfasst werden kann.Method for the continuous measurement of the heartbeat rate, in which the EKG signal of a person on the chest is electronically measured and identified and from a transmitter device to a wrist or hand-carried Measuring instrument part is sent, characterized in that the detected heart pulse signal without separate outer signal conductors to diner in the hand or on the wrist worn by the same person, connected to the hand with the help of an electrode Receiver device is sent using the body as a signal conductor, by the high-frequency EKG-modulated electrical signal of the transmitter device is switched to the person's body by means of an EKG electrode, in which case this high frequency electrical signal through the person's body and hand through and through which the transmitter and receiver devices are coupled together term »capacitances and stray fields is transmitted and electronically by means of the am Wrist or hand-held receiver device can be detected. 2. Verfahren gemäss Anspruch 1, dadurch gekennzeichnet, dass der Detektorteil der Sendervorrichtung für den Herzpuls und der ein elektrisches Signal in den Körper aussendende Senderteil voneinander galvanisch getrennt sind durch Verwendung eines Wandlers, Optoisolators, oder einer sonstigen Isolation mit genügend hoher Impedanz mit Rücksicht auf die Sicherheit der Person. 2. The method according to claim 1, characterized in that the Detector part of the transmitter device for the heart rate and an electrical signal The transmitter parts emitting into the body are galvanically separated from each other by Use of a converter, optoisolator, or some other isolation with sufficient high impedance with regard to the safety of the person. 3. Verfahren gemäss Anspruch 1, dadurch gekennzeichnet, dass das gemessene und identifizierte IIerzpulssignal in der Form eines hochfrequenten elektrischen Signals über beide Hände der Person, unter Verwendung derselben als Leiter zur Empfängervorrichtung gesandt wird, indem man dieses elektrische Signal zwischen zwei den Herzpuls auffangende EKG-Elektroden schaltet, wobei dann dieses hochfrequente elektrische Signal an die Empfängervorrichtung über den Körper und die Hände geschaltet wird, wenn die Person diE!I~~ an den Eingangspolen des Signalverstärkers in der Empfängervorrichtung angeschlossenen Elektroden berührt. 3. The method according to claim 1, characterized in that the measured and identified ore pulse signal in the form of a high frequency electrical Signal through both hands of the person, using them as a conductor to the receiver device is sent by intercepting this electrical signal between two of the heart pulse EKG electrodes switch, this high-frequency electrical signal then being sent to the Receiver device is switched over the body and hands when the person diE! I ~~ connected to the input poles of the signal amplifier in the receiving device Touches electrodes.
DE19792907570 1979-02-27 1979-02-27 Continuous measurement of heart beat frequency - using sensors and transmitter strapped to chest and linked to wrist detector through arm Withdrawn DE2907570A1 (en)

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DE19792907570 DE2907570A1 (en) 1979-02-27 1979-02-27 Continuous measurement of heart beat frequency - using sensors and transmitter strapped to chest and linked to wrist detector through arm

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DE19792907570 DE2907570A1 (en) 1979-02-27 1979-02-27 Continuous measurement of heart beat frequency - using sensors and transmitter strapped to chest and linked to wrist detector through arm

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DE2907570A1 true DE2907570A1 (en) 1980-08-28

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995000070A1 (en) * 1993-06-22 1995-01-05 Increa Oy A device for measuring quantities related to blood circulation
WO1996023373A1 (en) * 1995-01-25 1996-08-01 Philip Ashley Haynes Communication method
US5622180A (en) * 1991-12-09 1997-04-22 Polar Electro Oy Device for measuring heartbeat rate
US5632279A (en) * 1993-11-04 1997-05-27 Polar Electro Oy Method of interference-tolerant transmission of heartbeat signals

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5622180A (en) * 1991-12-09 1997-04-22 Polar Electro Oy Device for measuring heartbeat rate
WO1995000070A1 (en) * 1993-06-22 1995-01-05 Increa Oy A device for measuring quantities related to blood circulation
US5632279A (en) * 1993-11-04 1997-05-27 Polar Electro Oy Method of interference-tolerant transmission of heartbeat signals
WO1996023373A1 (en) * 1995-01-25 1996-08-01 Philip Ashley Haynes Communication method
AU712988B2 (en) * 1995-01-25 1999-11-18 Philip Ashley Haynes Method and apparatus for producing sound
US6118882A (en) * 1995-01-25 2000-09-12 Haynes; Philip Ashley Communication method

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