DE1962335A1 - Method for the interference-free detection of the peripheral pulse - Google Patents

Method for the interference-free detection of the peripheral pulse

Info

Publication number
DE1962335A1
DE1962335A1 DE19691962335 DE1962335A DE1962335A1 DE 1962335 A1 DE1962335 A1 DE 1962335A1 DE 19691962335 DE19691962335 DE 19691962335 DE 1962335 A DE1962335 A DE 1962335A DE 1962335 A1 DE1962335 A1 DE 1962335A1
Authority
DE
Germany
Prior art keywords
light
pulse
interference
signals
peripheral pulse
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
DE19691962335
Other languages
German (de)
Other versions
DE1962335B2 (en
Inventor
Axel Fischer
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.)
BBC Brown Boveri France SA
Original Assignee
BBC Brown Boveri France SA
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 BBC Brown Boveri France SA filed Critical BBC Brown Boveri France SA
Priority to DE19691962335 priority Critical patent/DE1962335B2/en
Priority to CH1122470A priority patent/CH506997A/en
Priority to FR7044268A priority patent/FR2073138A5/en
Priority to BE760170A priority patent/BE760170A/en
Priority to NL7018013A priority patent/NL7018013A/xx
Publication of DE1962335A1 publication Critical patent/DE1962335A1/en
Publication of DE1962335B2 publication Critical patent/DE1962335B2/en
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • A61B5/02416Detecting, measuring or recording pulse rate or heart rate using photoplethysmograph signals, e.g. generated by infrared radiation
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11CSTATIC STORES
    • G11C19/00Digital stores in which the information is moved stepwise, e.g. shift registers
    • G11C19/18Digital stores in which the information is moved stepwise, e.g. shift registers using capacitors as main elements of the stages
    • G11C19/182Digital stores in which the information is moved stepwise, e.g. shift registers using capacitors as main elements of the stages in combination with semiconductor elements, e.g. bipolar transistors, diodes

Description

BROWN, BOVERl & CIE · AKTIENGESELLSCHAFTBROWN, BOVERl & CIE · AKTIENGESELLSCHAFT MANNHEIM BROWN BOVERiMANNHEIM BROWN BOVERi

Mp.-Nr.- 686/69 Mannheim, den 20. Nov. I969 Mp.-No. 686/69 Mannheim, November 20, 1969

Pat/P/Bu.Pat / P / Bu.

"Verfahren zur störungsfreien Erfassung des peripheren Pulses""Procedure for the undisturbed detection of the peripheral pulse"

Die Erfindung betrifft ein Verfahren zur photoelektronischen Erfassung des peripheren Pulses mit Hilfe einer Lichtquelle und eines Lichtempfängers,The invention relates to a method for photoelectronic detection of the peripheral pulse with the aid of a light source and a light receiver,

Die Kontrolle der peripheren Durchblutung und der Pulsfre = quenz ist für die Kreislaufdiagnose und -Überwachung von großer Bedeutung. Hierzu hat es sich als zweckmäßig erwiesen, die durch die Herztätigkeit verursachten und u.a. durch die Gefäßmuskulatur beeinflußten Volumenschwankungen in peripheren Gefäßen zu kontrollieren.Control of peripheral blood flow and pulse rate quenzy is of great importance for circulatory diagnosis and monitoring. To this end, it has proven to be useful the volume fluctuations in control peripheral vessels.

Es sind Verfahren bekannt, die hierzu die Absorbtion des von einer Quelle ausgehenden Lichtes konstanter Intensi= tat im Gewebe ausnützen (DT-Gbm 1 96I I86 und H. Kresse: "Prinzipien und kritischer Vergleich einiger peripherer Pulsabnehmer", Elektromedizin 13 (1968 : 25-30). Ein schwer= wiegender Nachteil der bisher bekannten Verfahren besteht darin, daß der Lichtempfänger auch auf Änderungen des Um= gebungslichtes anspricht, dem Nutzsignal also ein u.U. größeres Störsignal Überlagert wird. Wird mit derartigen Einrichtungen die Pulsfrequenz überwacht, dann kann z.B. beim Einschalten der Raumbeleuchtung Fehlalarm ausgelöst werden. Um diese Störungen von Umgebungslichtschwankungen auszuschalten, muß der beschriebene Pulsaufnehmer und die Meßstelle durch lichtundurchlässiges Material abgedeckt werden. Dieses Abdecken ist lästig und an einer der bevor= zugten Meßstellen, am Ohr, schwierig. Ein weiterer NachteilMethods are known which for this purpose the absorption of the light of constant intensity emanating from a source exploiting the fact in the tissue (DT-Gbm 1 96I I86 and H. Kresse: "Principles and critical comparison of some peripheral heart rate collectors", Elektromedizin 13 (1968: 25-30). A hard = The main disadvantage of the previously known method is that the light receiver is also sensitive to changes in Um = ambient light responds, i.e. a possibly larger interference signal is superimposed on the useful signal. Will with such Equipment monitors the pulse frequency, for example when the room lighting is switched on, false alarms can be triggered will. In order to eliminate these disturbances from fluctuations in ambient light, the pulse sensor described and the The measuring point must be covered by an opaque material. This covering is annoying and one of the before = close measuring points, on the ear, difficult. Another disadvantage

209810/0666209810/0666

686/69686/69

der bekannten Verfahren besteht darin, daß die Licht kon= stanter Intensität aussendende Lichtquelle viel Wärme er= zeugt. Die zur Abfuhr der Wärme erforderliche große Ober= fläche des Pulsaufnehmers steht der angestrebten Minia= turisierung entgegen.the known method consists in the fact that the light source emitting light of constant intensity generates a lot of heat testifies. The large surface area of the pulse sensor required to dissipate the heat is the desired minimum against turization.

Ein weiterer Nachteil der bekannten Verfahren besteht darin, daß dem Ausgangssignal des Lichtempfangers oft Storspannungen, z.B. durch das Netz, überlagert sind, die der Lichtempfänger oder das Zuleitungskabel kapazitiv oder induktiv aufgenommen haben.Another disadvantage of the known method is that the output signal of the light receiver often receives interference voltages, e.g. by the network, which are superimposed on the light receiver or have picked up the supply cable capacitively or inductively.

Der Erfindung liegt die Aufgabe zugrunde, eine störungsfreie Erfassung des peripheren Pulses zu ermöglichen, d.h. den Einfluß von Umgebungslicht sowie elektrischer Störspannungen auszuschalten und die Erwärmung der Meßstelle zu vermeiden.The invention is based on the object of enabling interference-free detection of the peripheral pulse, i.e. the Eliminate the influence of ambient light and electrical interference voltages and avoid heating the measuring point.

Die Lösung dieser Aufgabe besteht bei einem Verfahren der eingangs beschriebenen Gattung erfindungsgemäß darin, daß die Lichtquelle moduliertes Licht impulsweise aussendet. In vorteilhafter Weise ermöglicht damit das Verfahren, störungs= freie Meßsignale zu benutzen. Die Quelle kann sinusmodu= lierte Signale in bestimmten zeitlichen Abständen bereit= stellen oder auch mit Pulsmodulation arbeiten, insbesondere wird in beiden Fällen amplitudenmoduliertes Licht aus ge send et',·* Zur Vermeidung der Erwärmung der Meßstelle ist die Impuls= dauer vorzugsweise kürzer als die Impulspause. Bei entspre= chender Festlegung der Fühlerabmessungen ist die abzufüh= rende Verlustleistung vernachlässigbar. Vortexlhafterviexse können die von der Lichtquelle abgegebenen Lichtsignale Frequenzen enthalten, die so groß sind, daß in den dem Em= pfänger nachgeschalteten Verstärkern Nutzsignale und Stör= signale aufgrund ihrer unterschiedlichen Frequenzen ge= trennt werden können.'In a method of the type described at the outset, this object is achieved according to the invention in that the light source emits modulated light in pulses. Advantageously, the method thus enables disturbance = to use free measurement signals. The source can prepare sine-modulated signals at certain time intervals or work with pulse modulation, in particular in both cases amplitude-modulated light is sent out ', * To prevent the measuring point from heating up, the pulse duration is preferably shorter than the pulse pause. If corresponding = According to the definition of the sensor dimensions, the sensor is to be sensed = The resulting power loss is negligible. Vortex cells can use the light signals emitted by the light source Contain frequencies that are so large that useful signals and interference signals in the amplifiers connected downstream of the receiver signals can be separated due to their different frequencies. '

209810/0666209810/0666

-· 3 - 686/69- · 3 - 686/69

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher beschrieben. Ein Generator 1 liefert die Spannungsimpulse für eine Licht aussendende Halbleiterdiode 2. Die von der Diode ausgehenden Lichtimpulse werden von einem Gewebe 3 entsprechend der dort stattfindenden Absorbtion in ihrer Intensität verändert und von einer Fotodiode 1J in Spannungsimpulse umgewandelt, die ein Maß für die Pulsfrequenz sind. Ein nachgeschalteter Verstärker 5 unterdrückt die niederfrequenten, durch Störungen, z.B. durch eine elektrische Lichtquelle, verursachten Anteile des Eingangssignals und gibt die verstärkten Impulse an einen Spitzenspannungsspeicher 6 weiter. Der Pegel der am Ausgang des Spitzenspannungsspeichers anstehenden Signal= spannung 8 wird nach Abtrennung des Gleichspannungsanteils im Verstärker 7 angehoben.An embodiment of the invention is shown in the drawing and is described in more detail below. A generator 1 supplies the voltage pulses for a light-emitting semiconductor diode 2. The emitted by the diode light pulses are changed from one fabric 3 according to the held there absorbance in intensity and converted by a photodiode 1 J into voltage pulses which are a measure of the pulse rate . A downstream amplifier 5 suppresses the low-frequency components of the input signal caused by interference, for example from an electrical light source, and forwards the amplified pulses to a peak voltage store 6. The level of the signal = voltage 8 present at the output of the peak voltage memory is raised after the DC voltage component has been separated off in the amplifier 7.

Mit dem erfindungsgemäßen Verfahren gewinnt die medizinische Meßtechnik erstmalig in* vorteilhafter Weise eine exakte Methode zur störungsfreien Erfassung der Pulsfrequenz. Die Messung der sehr kleinen Signale ist vorteilhaft so ausgeführt, daß der Arzt oder die betreuende Person den ihn interessierenden Wert angezeigt bekommen kann. Das Verfahren eignet sich vorzüglich zur zentralen überwachung mehrerer Patienten mit einer Anwähleinrichtung.With the method according to the invention, the medical one wins Measurement technology for the first time in an advantageous way an exact method for the undisturbed detection of the pulse frequency. the Measurement of the very small signals is advantageously carried out in such a way that the doctor or the caring person can identify the person who is of interest to him Value can be displayed. The method is particularly suitable for the central monitoring of several patients a voting facility.

209810/0666209810/0666

Claims (3)

686/69686/69 PatentansprücheClaims 1, Verfahren zur photoelektronischen Erfassung des peri= pheren Pulses mit Hilfe einer Lichtquelle und eines Lichtempfängers, dadurch gekennzeich= net, daß die Lichtquelle (2) moduliertes Licht impulsweise aussendet, das das Gewebe (3) durchquert und anschließend demoduliert wird,1, method for photoelectronic detection of the peripheral pulse with the help of a light source and a Light receiver, marked thereby = net that the light source (2) modulated light emits impulses that traverses the tissue (3) and is then demodulated, 2. Verfahren nach Anspruch 1,dadurch gekenn= zeichnet, daß die Dauer des Lichtimpulses kürzer als die darauffolgende Pause ist.2. The method according to claim 1, characterized in that = shows that the duration of the light pulse is shorter than the pause that follows. 3. Verfahren nach Anspruch 1 oder 2, dadurch ge= kennzeichnet, daß die von der Quelle (2) abgegebenen Lichtsignale Frequenzen enthalten, die so groß sind, daß in den dem Empfänger nachgeschalteten Verstärkern (5) Nutzsignale und Störsignale aufgrund ihrer unterschiedlichen Frequenzen getrennt werden können.3. The method according to claim 1 or 2, characterized in that the source (2) emitted light signals contain frequencies that are so large that in the downstream of the receiver Amplifiers (5) useful signals and interference signals can be separated due to their different frequencies. 209810/0666209810/0666
DE19691962335 1969-12-12 1969-12-12 METHOD FOR ERROR-FREE DETECTION OF THE PERIPHERAL PULSE AND ARRANGEMENT FOR PERFORMING THE METHOD Ceased DE1962335B2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE19691962335 DE1962335B2 (en) 1969-12-12 1969-12-12 METHOD FOR ERROR-FREE DETECTION OF THE PERIPHERAL PULSE AND ARRANGEMENT FOR PERFORMING THE METHOD
CH1122470A CH506997A (en) 1969-12-12 1970-07-24 Device for photoelectric measurement of the peripheral pulse
FR7044268A FR2073138A5 (en) 1969-12-12 1970-12-09 DEVICE FOR THE PHOTOELECTRIC MEASUREMENT OF THE PERIPHERAL PULSE
BE760170A BE760170A (en) 1969-12-12 1970-12-10 DEVICE FOR THE PHOTOELECTRIC MEASUREMENT OF THE PERIPHERAL PULSE
NL7018013A NL7018013A (en) 1969-12-12 1970-12-10

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691962335 DE1962335B2 (en) 1969-12-12 1969-12-12 METHOD FOR ERROR-FREE DETECTION OF THE PERIPHERAL PULSE AND ARRANGEMENT FOR PERFORMING THE METHOD

Publications (2)

Publication Number Publication Date
DE1962335A1 true DE1962335A1 (en) 1972-03-02
DE1962335B2 DE1962335B2 (en) 1976-11-11

Family

ID=5753670

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19691962335 Ceased DE1962335B2 (en) 1969-12-12 1969-12-12 METHOD FOR ERROR-FREE DETECTION OF THE PERIPHERAL PULSE AND ARRANGEMENT FOR PERFORMING THE METHOD

Country Status (5)

Country Link
BE (1) BE760170A (en)
CH (1) CH506997A (en)
DE (1) DE1962335B2 (en)
FR (1) FR2073138A5 (en)
NL (1) NL7018013A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3980075A (en) * 1973-02-08 1976-09-14 Audronics, Inc. Photoelectric physiological measuring apparatus
DE3609075A1 (en) * 1986-03-18 1987-09-24 Hans J Prof Dr Rer Nat Schmitt MICROPROCESSOR CONTROLLED DEVICE FOR NON-INVASIVE DETECTION OF PERIPHERAL DRAIN AND FLOW INTERFERENCES
DE4238641A1 (en) * 1992-11-16 1994-05-19 Kraus Manfred Blood vessel condition evaluation using photo-plethysmography - applying mechanical, acoustic, ultrasound or pressure function, evaluating transfer function, deriving standardised values, characteristics and distribution, comparing with age-related standard and classifying
DE4322860A1 (en) * 1993-07-08 1995-01-19 Laumann Medizintech Gmbh Method and device for determining and evaluating the state of vascular systems
DE4445683A1 (en) * 1994-12-21 1996-06-27 Boehringer Mannheim Gmbh Method for examining a scattering medium with intensity-modulated light

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3006477A1 (en) * 1980-02-21 1981-09-03 Philips Patentverwaltung Gmbh, 2000 Hamburg CIRCUIT FOR MEASURING THE PULSE OF A PERSON WITH A CONTROLLABLE LIGHT SOURCE
FR2524792B1 (en) * 1982-04-13 1985-09-27 Fenestraz Louis METHOD FOR MEASURING CARDIO-VASCULAR VALUES AND DEVICE FOR IMPLEMENTING SAME
JPS61187836A (en) * 1985-02-15 1986-08-21 株式会社 津山金属製作所 Pulse meter
DE19528856A1 (en) * 1995-08-05 1997-02-06 Harald Dipl Ing Thiele Multi-functional compliance measuring system for clinical studies - records tablet dispensing and detects corresponding clinical and physiological parameters of patient for compliance checking.

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3980075A (en) * 1973-02-08 1976-09-14 Audronics, Inc. Photoelectric physiological measuring apparatus
DE3609075A1 (en) * 1986-03-18 1987-09-24 Hans J Prof Dr Rer Nat Schmitt MICROPROCESSOR CONTROLLED DEVICE FOR NON-INVASIVE DETECTION OF PERIPHERAL DRAIN AND FLOW INTERFERENCES
DE4238641A1 (en) * 1992-11-16 1994-05-19 Kraus Manfred Blood vessel condition evaluation using photo-plethysmography - applying mechanical, acoustic, ultrasound or pressure function, evaluating transfer function, deriving standardised values, characteristics and distribution, comparing with age-related standard and classifying
DE4322860A1 (en) * 1993-07-08 1995-01-19 Laumann Medizintech Gmbh Method and device for determining and evaluating the state of vascular systems
DE4445683A1 (en) * 1994-12-21 1996-06-27 Boehringer Mannheim Gmbh Method for examining a scattering medium with intensity-modulated light
US5713352A (en) * 1994-12-21 1998-02-03 Boehringer Mannheim Gmbh Method for investigating a scattering medium with intensity-modulated light

Also Published As

Publication number Publication date
BE760170A (en) 1971-05-17
NL7018013A (en) 1971-06-15
CH506997A (en) 1971-05-15
FR2073138A5 (en) 1971-09-24
DE1962335B2 (en) 1976-11-11

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