WO1997035515A1 - Method and device for measuring a pulse rate - Google Patents

Method and device for measuring a pulse rate Download PDF

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Publication number
WO1997035515A1
WO1997035515A1 PCT/EP1997/001422 EP9701422W WO9735515A1 WO 1997035515 A1 WO1997035515 A1 WO 1997035515A1 EP 9701422 W EP9701422 W EP 9701422W WO 9735515 A1 WO9735515 A1 WO 9735515A1
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WO
WIPO (PCT)
Prior art keywords
sensor
transmitter
receiver
telemetry
net
Prior art date
Application number
PCT/EP1997/001422
Other languages
German (de)
French (fr)
Other versions
WO1997035515B1 (en
Inventor
Daniel Oser
Original Assignee
Domed Medizintechnik Gmbh
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Publication of WO1997035515A1 publication Critical patent/WO1997035515A1/en
Publication of WO1997035515B1 publication Critical patent/WO1997035515B1/en

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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
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
    • A61B5/683—Means for maintaining contact with the body
    • A61B5/6832—Means for maintaining contact with the body using adhesives
    • A61B5/6833—Adhesive patches
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, 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
    • A61B5/024—Detecting, measuring or recording pulse rate or heart rate
    • A61B5/02416—Detecting, measuring or recording pulse rate or heart rate using photoplethysmograph signals, e.g. generated by infrared radiation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, 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
    • A61B5/024—Detecting, measuring or recording pulse rate or heart rate
    • A61B5/02416—Detecting, measuring or recording pulse rate or heart rate using photoplethysmograph signals, e.g. generated by infrared radiation
    • A61B5/02427—Details of sensor
    • A61B5/02433—Details of sensor for infrared radiation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, 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
    • A61B5/024—Detecting, measuring or recording pulse rate or heart rate
    • A61B5/02438—Detecting, measuring or recording pulse rate or heart rate with portable devices, e.g. worn by the patient
    • 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
    • A61B2560/0406—Constructional details of apparatus specially shaped apparatus housings
    • A61B2560/0412—Low-profile patch shaped housings

Definitions

  • Portable heart rate monitors are therefore being used to an ever increasing extent. They either work on the basis of photocells (photoreflective devices) for pulse rate measurement, the sensor being attached to the earlobe or on the finger, or on an electronic basis similar to a cardiograph, with a chest strap with suitable, electrodes placed on the skin are used for heart rate measurement.
  • the signals arrive, possibly by telemetry, at a display device which is worn on the wrist, for example, like a wristwatch.
  • Chest straps also have to be used for changing use, e.g. in fitness centers, disinfected for every person.
  • the invention has for its object to provide a device for pulse frequency measurement, which is comfortable to wear at a low price and also allows questions of hygiene with changing wearers to be easily mastered. This task is solved by a device according to claim 1 or the method according to claim 11
  • NIRP Near-infrared photoplethysmography
  • the invention is based on the knowledge that certain locations on the forehead are particularly suitable for the pulse frequency measurement with NIRP probes, which do not allow usable use of other measurement methods.
  • the invention offers a number of important advantages with little effort.
  • the forehead skin is trimmed by the skull bone and, since it usually remains uncovered, is very resistant.
  • the head area, and thus also the forehead, is one of those parts of the body that are least exposed to shocks and accelerations
  • Transmitter and receiver are combined in a sensor assembly, in which the small batteries required for operation can also be installed.
  • the sensor is therefore easy to use and very comfortable to wear.For example, it can be inserted into a headband that is easy to clean.You can also use it in headgear that is common in individual sports, such as cycling helmets or ski hats.
  • the sensor In the case of telemetry transmission, the sensor is an insensitive component without protruding parts or lines, which is well suited for insertion in the most varied headgear covering the forehead. An age native then consists of sticking the sensor onto the forehead using a suitably shaped adhesive applicator.
  • the display device is usually worn on the wrist and connected to the NIRP sensor via a cable, or better via telemetry.
  • the telemetry transmitter is also assembled with the NIRP sensor.
  • the display it is not absolutely necessary for the display to be made in the field of view of the wearer.
  • the values of several customers can be displayed in multi-channel technology by means of an intelligent protocol at a central location, so that a supervising trainer can recognize which customers should increase or decrease the load.
  • This application also describes everyday use in people whose pulse rate you want to record in a private or clinical setting.
  • a NIRP sensor is light in weight, with a substantial proportion coming from the built-in batteries.
  • the pulse frequency measurement can be carried out instead of continuously, e.g. every 10 or 20 seconds.
  • a trend analysis is then obtained which is completely sufficient for most practical applications and thereby optimizes the energy requirement and keeps the battery weight small.
  • FIG. 1 is a schematic representation of the zone of the human forehead suitable for the application of the NIRP probe in the sense of the invention
  • Figure 2 is a schematic bottom view of a headband that carries a NIRP sensor
  • FIG 3 is a schematic side view of a sensor with a telemetry transmitter and an associated display device.
  • a zone of the forehead that extends from left to right over the eyebrows has proven to be advantageous.
  • the easiest way to place the sensor is in the middle of this zone (indicated by cross hatching) just above the glabella.
  • Other locations on the forehead outside the indicated zone are less suitable for the purposes of the invention.
  • a headband 1 is partially shown, which is provided with a window 2.
  • the sensor is inserted into a pocket 3, which is indicated by dashed lines in FIG. 2 and has an inlet opening 4 for inserting the sensor 5.
  • the fully inserted sensor appears in window 2 and can then be placed on the forehead with the headband.
  • Fig. 3 shows a possibility for the formation of the sensor.
  • Transmitter 6 and receiver 7 are separated from one another by an elevation 8 in order to avoid a direct transition of the radiation from the transmitter to the receiver.
  • the sensor also carries a telemetry transmitter 9 which interacts with a display device 10 worn on the wrist.
  • Batteries 1 1, 12 are installed in the probe, which supply the energy required for operation.
  • the receiver signal can also be sent to a processing device via lines be transmitted.
  • the display device can be attached to the bicycle handlebar.

Abstract

In order to measure a pulse rate according to the near-infrared-photoplethysmography method, a sensor (1) comprising an emitter (6) and a receiver (7) is placed on the forehead, precisely over the glabella. The measured values can be transmitted to a display device (10) by telemetry (9, 10).

Description

Vorrichtung und Verfahren zur Pulsfrequenzmessung Device and method for pulse frequency measurement
Das Messen und Überwachen der Herzfrequenz in Ruhe und in verschiede¬ nen Stadien der Belastung ist für Hobby- wie für Profisportler ein effektives Mittel zur Messung, Steuerung und Überwachung des Trainingsprogramms. Tragbare Herzfrequenzmeßgerate werden daher in stets zunehmendem Aus¬ maß eingesetzt Sie arbeiten entweder auf Photozellenbasis (photoreflektie¬ rende Gerate) zur Pulsfrequenzmessung, wobei der Sensor am Ohrläppchen oder am Finger angebracht ist, oder auf elektronischer Basis ähnlich einem Kardiographen, wobei ein Brustgurt mit geeigneten, auf die Haut aufgesetz- ten Elektroden zur Herzfrequenzmessung verwendet wird. Die Signale gelangen, gegebenenfalls durch Telemetπe, an ein Anzeigegerat, das bei¬ spielsweise am Handgelenk wie eine Armbanduhr getragen wird.Measuring and monitoring the heart rate at rest and in various stages of exertion is an effective means of measuring, controlling and monitoring the training program for hobby and professional athletes. Portable heart rate monitors are therefore being used to an ever increasing extent. They either work on the basis of photocells (photoreflective devices) for pulse rate measurement, the sensor being attached to the earlobe or on the finger, or on an electronic basis similar to a cardiograph, with a chest strap with suitable, electrodes placed on the skin are used for heart rate measurement. The signals arrive, possibly by telemetry, at a display device which is worn on the wrist, for example, like a wristwatch.
Beide Geratetypen weisen erhebliche Nachteile beim Einsatz m der Bewe- gung auf (Joggmg, Radfahren, Schwimmen usw.). Die Erschütterungen und Beschleunigungs- bzw. Verzogerungseffekte fuhren zu Artefakten und Storsi- gnalen, wenn nicht sogar zur Ablösung der Sonden bzw. Elektroden von dem Meßort. Will man dies durch eine straffere Befestigung vermeiden, erhöht man die mit dem Tragen der Meßsonden bzw. des Brustgurts mit Elektroden verbundenen Unbequemlichkeiten, z.B. beim weiblichen Oberkör¬ per. Auch müssen Brustgurte bei wechselnden Einsatz, z.B. in Fitness- Zentren, für jede Person desinfiziert werden.Both types of device have considerable disadvantages when used in motion (jogging, cycling, swimming, etc.). The vibrations and acceleration or deceleration effects lead to artifacts and spurious signals, if not to detachment of the probes or electrodes from the measurement location. If you want to avoid this by tightening the fastening, you increase the inconvenience associated with wearing the measuring probes or the chest strap with electrodes, e.g. in the female upper body. Chest straps also have to be used for changing use, e.g. in fitness centers, disinfected for every person.
Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung zur Pulsfre- quenzmessung zu schaffen, die bei niedrigem Preis komfortabel zu tragen ist und auch gestattet, Fragen der Hygiene bei wechselnden Tragern einfach zu beherrschen Diese Autgabe wird durch eine Vorrichtung nach dem An¬ spruch 1 bzw. das Verfahren nach Anspruch 1 1 gelostThe invention has for its object to provide a device for pulse frequency measurement, which is comfortable to wear at a low price and also allows questions of hygiene with changing wearers to be easily mastered. This task is solved by a device according to claim 1 or the method according to claim 11
Die Nah-Infrarot-Photoplethysmographie (NIRP) mit Nah-Infrarot-Sendern und geeigneten Empfangern ist bekannt Sie gestattet mit einer Strahlung von beispielsweise 800 nm die nichtinvasive Untersuchung von Veränderungen der Mikro- und Makrozirkulation mittels einer computergestutzten Pulswellen¬ analyse. Das Verfahren ist beispielsweise im European Journal of Medical Research, 1995/96, 1 1-7, beschrieben.Near-infrared photoplethysmography (NIRP) with near-infrared transmitters and suitable receivers is known. With radiation of, for example, 800 nm, it permits the non-invasive examination of changes in the micro and macrocirculation by means of a computer-aided pulse wave analysis. The method is described, for example, in the European Journal of Medical Research, 1995/96, 1-7.
Die Erfindung beruht nun auf der Erkenntnis, daß für die Pulsfrequenz¬ messung mit NIRP-Sonden bestimmte Stellen der Stirn besonders geeignet sind, die keine brauchbare Anwendung anderer Meßverfahren erlauben. Die Erfindung bietet bei geringem Aufwand eine Reihe wichtiger Vorteile. Die Stirnhaut wird vom Schadelknochen gestutzt und ist, da sie in der Regel unbedeckt bleibt, sehr widerstandsfähig. Der Kopfbereich, und damit auch die Stirn, gehört zu den Stellen des Korpers, die am wenigsten Erschütte¬ rungen und Beschleunigungen ausgesetzt sindThe invention is based on the knowledge that certain locations on the forehead are particularly suitable for the pulse frequency measurement with NIRP probes, which do not allow usable use of other measurement methods. The invention offers a number of important advantages with little effort. The forehead skin is trimmed by the skull bone and, since it usually remains uncovered, is very resistant. The head area, and thus also the forehead, is one of those parts of the body that are least exposed to shocks and accelerations
Sender und Empfanger sind in eine Baugruppe Sensor zusammengefaßt, in die auch noch die zum Betrieb notigen Kleinbatteπen eingebaut sein können. Der Sensor ist daher einfach autzusetzen und sehr komfortabel zu tragen Er kann beispielsweise in ein Stirnband eingeschoben werden, das leicht zu reinigen ist Man kann ihn auch in Kopfbedeckungen einsetzen, die in den einzelnen Sportarten üblich sind, wie Radfahrerhelme oder Skimutzen. Bei Telemetπeubertragung ist der Sensor ein unempfindliches Bauteil ohne vorsteheπuc Teile oder Leitungen, das sich gut zum Einsetzen in die ver¬ schiedensten, die Stirn erfassenden Kopfbedeckungen eignet. Eine Alter- native besteht dann, den Sensor mit Hilfe eines geeignet geformten Haft- applikators auf die Stirn aufzukleben.Transmitter and receiver are combined in a sensor assembly, in which the small batteries required for operation can also be installed. The sensor is therefore easy to use and very comfortable to wear.For example, it can be inserted into a headband that is easy to clean.You can also use it in headgear that is common in individual sports, such as cycling helmets or ski hats. In the case of telemetry transmission, the sensor is an insensitive component without protruding parts or lines, which is well suited for insertion in the most varied headgear covering the forehead. An age native then consists of sticking the sensor onto the forehead using a suitably shaped adhesive applicator.
Das Anzeigegerät wird, wie an sich üblich, in der Regel am Handgelenk getragen und mit dem NIRP-Sensor über eine Leitung, besser über Teleme- trie, verbunden. In letzterem Fall wird auch noch der Telemetriesender mit dem NIRP-Sensor zusammengebaut. Es ist jedoch nicht unbedingt erforder¬ lich, daß die Anzeige im Gesichtsfeld des Trägers erfolgt. Beispielsweise kann man in einem Fitnesszentrum die Werte mehrerer Kunden in Mehr- kanaltechnik durch ein intelligentes Protokoll an einem zentralen Ort anzei¬ gen, so daß ein überwachender Trainer erkennen kann, bei welchem Kunden die Belastung erhöht bzw. gesenkt werden sollte. Dieser Anwendungsfall beschreibt auch die Nutzung im Alltag bei Personen, deren Pulsfrequenz man in privaten oder klinischen Umfeld erfassen will.As usual, the display device is usually worn on the wrist and connected to the NIRP sensor via a cable, or better via telemetry. In the latter case, the telemetry transmitter is also assembled with the NIRP sensor. However, it is not absolutely necessary for the display to be made in the field of view of the wearer. For example, in a fitness center, the values of several customers can be displayed in multi-channel technology by means of an intelligent protocol at a central location, so that a supervising trainer can recognize which customers should increase or decrease the load. This application also describes everyday use in people whose pulse rate you want to record in a private or clinical setting.
Ein NIRP-Sensor hat geringes Gewicht, wobei ein beträchtlicher Anteil von den eingebauten Batterien herrührt. Zur Herabsetzung des Energiebedarfs des Sensors kann man die Pulsfrequenzmessung statt kontinuierlich in Ab¬ ständen vornehmen, z.B. alle 10 oder 20 Sekunden. Statt der "beat-to- beaf-Messung gelangt man dann zu einer Trendanalyse, die für die al¬ lermeisten praktischen Anwendungen völlig ausreicht und dabei den Energie¬ bedarf optimiert und das Batteriegewicht klein hält.A NIRP sensor is light in weight, with a substantial proportion coming from the built-in batteries. To reduce the energy requirement of the sensor, the pulse frequency measurement can be carried out instead of continuously, e.g. every 10 or 20 seconds. Instead of the "beat-to-beaf measurement, a trend analysis is then obtained which is completely sufficient for most practical applications and thereby optimizes the energy requirement and keeps the battery weight small.
Weitere Merkmale der Erfindung werden anhand eines Ausführungsbeispiels beschrieben, das in der Zeichnung schematisch dargestellt ist.Further features of the invention are described using an exemplary embodiment which is shown schematically in the drawing.
Fig. 1 ist eine schematische Darstellung der Zone der menschlichen Stirn, uie sich für das Anlegen der NIRP-Sonde im Sinne der Erfindung eignet; Fig. 2 ist eine schematische Untersicht eines Stirnbands, das einen NIRP- Sensor trägt;1 is a schematic representation of the zone of the human forehead suitable for the application of the NIRP probe in the sense of the invention; Figure 2 is a schematic bottom view of a headband that carries a NIRP sensor;
Fig. 3 ist eine schematische Seitenansicht eines Sensors mit Telemetrie- sender und eines zugeordneten Anzeigegeräts.3 is a schematic side view of a sensor with a telemetry transmitter and an associated display device.
Wie Fig. 1 schematisch zeigt, hat sich eine Zone der Stirn als günstig erwiesen, die sich über den Brauen von links nach rechts erstreckt. Am einfachsten wird der Sensor in der Mitte dieser Zone (in Kreuzschraffur angedeutet) knapp über der Glabella angelegt. Andere Stellen der Stirn außerhalb der angedeuteten Zone sind für die Zwecke der Erfindung weniger gut geeignet.As schematically shown in FIG. 1, a zone of the forehead that extends from left to right over the eyebrows has proven to be advantageous. The easiest way to place the sensor is in the middle of this zone (indicated by cross hatching) just above the glabella. Other locations on the forehead outside the indicated zone are less suitable for the purposes of the invention.
In Fig. 2 ist ein Stirnband 1 teilweise dargestellt, das mit einem Fenster 2 versehen ist. Der Sensor wird in eine Tasche 3 eingeschoben, die in Fig. 2 gestrichelt angedeutet ist und eine Eintrittsöffnung 4 zum Einschieben des Sensors 5 aufweist. Der voll eingeschobene Sensor erscheint im Fenster 2 und kann dann mit dem Stirnband auf die Stirn aufgesetzt werden.In Fig. 2 a headband 1 is partially shown, which is provided with a window 2. The sensor is inserted into a pocket 3, which is indicated by dashed lines in FIG. 2 and has an inlet opening 4 for inserting the sensor 5. The fully inserted sensor appears in window 2 and can then be placed on the forehead with the headband.
Fig. 3 zeigt eine Möglichkeit zur Ausbildung des Sensors. Sender 6 und Empfänger 7 sind durch eine Erhebung 8 voneinander getrennt, um einen unmittelbaren Übergang der Strahlung vom Sender zum Empfänger zu vermeiden. Der Sensor trägt auch einen Telemetriesender 9, der mit einer am Handgelenk getragenen Anzeigevorrichtung 10 zusammenwirkt. In die Sonde sind Batterien 1 1 , 12 eingebaut, die die zum Betrieb nötige Energie liefern.Fig. 3 shows a possibility for the formation of the sensor. Transmitter 6 and receiver 7 are separated from one another by an elevation 8 in order to avoid a direct transition of the radiation from the transmitter to the receiver. The sensor also carries a telemetry transmitter 9 which interacts with a display device 10 worn on the wrist. Batteries 1 1, 12 are installed in the probe, which supply the energy required for operation.
Zur Realisierung der Erfindung sind zahlreiche Abweichungen von dem dargestellten Ausführungsbeispiel möglich. Für stationäre Messungen kann das Empfängersignal auch über Leitungen an eine Verarbeitungseinrichtung übertragen werden. Bei der Ergometrie kann die Anzeigevorrichtung an dem Fahrradlenker befestigt sein. Numerous deviations from the exemplary embodiment shown are possible for realizing the invention. For stationary measurements, the receiver signal can also be sent to a processing device via lines be transmitted. In ergometry, the display device can be attached to the bicycle handlebar.

Claims

Patentansprüche claims
1. Vorrichtung zur Pulsfrequenzmessung nach dem Prinzip der Nah-In- frarot-Photoplethysmographie (NIRP), wobei Sender und Empfänger in einem Sensor zusammengebaut sind, dadurch gekennzeichnet, daß der Sensor in einer Zone oberhalb der Augenbrauen, vorzugsweise in der Mitte dieser Zone knapp über der Glabella, auf der Stirn des Trägers gehalten ist, und daß die Meßsignale mittels Leitung oder Telemetrie auf ein Anzeigegerät übertragen werden.1. Device for pulse frequency measurement according to the principle of near-infrared photoplethysmography (NIRP), transmitter and receiver being assembled in one sensor, characterized in that the sensor is scarce in a zone above the eyebrows, preferably in the middle of this zone above the glabella, is held on the forehead of the wearer, and that the measurement signals are transmitted to a display device by means of line or telemetry.
2. Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, daß der Sensor in eine Kopfbedeckung eingesetzt ist.2. Device according to claim 1, characterized in that the sensor is inserted into a headgear.
3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Sensor in einen Fahrradhelm eingebaut ist.3. Apparatus according to claim 1 or 2, characterized in that the sensor is installed in a bicycle helmet.
4. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Sensor in eine Tasche in einem Stirnband eingeschoben ist, das am Ort des Sensors ein Fenster aufweist.4. Apparatus according to claim 1 or 2, characterized in that the sensor is inserted into a pocket in a headband which has a window at the location of the sensor.
5. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeich- net, daß der Sensor einen Telemetriesender enthält.5. Device according to one of claims 1 to 4, characterized in that the sensor contains a telemetry transmitter.
6. Vorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeich¬ net, uaß die Anzeige der Pulsfrequenzmessung im Blickfeld des Trä¬ gers, insbesondere durch einen am Handgelenk getragenen Telemetrie- empfänger oder wie bei Fahrradfahrern üblich an einem Anzeigegerät auf dem Lenker erfolgt.6. Device according to one of claims 1 to 5, characterized gekennzeich¬ net, the display of the pulse rate measurement in the field of view of the wearer, in particular by a telemetry worn on the wrist receiver or as usual with cyclists on a display device on the handlebars.
7. Vorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeich- net, daß eine zentrale Anzeige der Pulsfrequenz mehrerer Träger durch7. Device according to one of claims 1 to 5, characterized in that a central display of the pulse frequency of several carriers by
Mehrkanaltelemetrie vorgesehen ist.Multi-channel telemetry is provided.
8. Vorrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeich¬ net, daß die zum Betrieb des Sensors erforderlichen Batterien darin eingebaut sind.8. Device according to one of claims 1 to 7, characterized gekennzeich¬ net that the batteries required for operating the sensor are installed therein.
9. Vorrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeich¬ net, daß die Messung intermittierend, z.B. alle 10 oder 20 Sekunden, vorgenommen wird.9. Device according to one of claims 1 to 8, characterized gekennzeich¬ net that the measurement intermittently, e.g. every 10 or 20 seconds.
10. Vorrichtung nach einem der Ansprüche 1 bis 9, dadurch gekennzeich¬ net, daß der Sensor an seiner auf die Haut aufzusetzenden Seite so geformt ist, daß zwischen Sender und Empfänger eine Erhebung den unmittelbaren Übergang der Strahlung von Sender zu Empfänger verhin- den.10. Device according to one of claims 1 to 9, characterized gekennzeich¬ net that the sensor on its side to be placed on the skin is shaped so that an elevation between transmitter and receiver prevent the immediate transition of radiation from transmitter to receiver.
1 1. Verfahren zur Pulsfrequenzmessung nach dem Prinzip der Nah-Infrarot- Photoplethysmographie (NIRP), wobei Sender und Empfänger in einem Sensor zusammengebaut sind, dadurch gekennzeichnet, daß der Sensor in einer Zone oberhalb der Augenbrauen, vorzugsweise in der Mitte dieser Zone knapp über der Glabella, auf die Stirn aufgesetzt wird. 1 1. Method for pulse frequency measurement according to the principle of near-infrared photoplethysmography (NIRP), transmitter and receiver being assembled in one sensor, characterized in that the sensor is located in a zone above the eyebrows, preferably in the middle of this zone just above the glabella, which is placed on the forehead.
PCT/EP1997/001422 1996-03-22 1997-03-20 Method and device for measuring a pulse rate WO1997035515A1 (en)

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