DE1962335B2 - METHOD FOR ERROR-FREE DETECTION OF THE PERIPHERAL PULSE AND ARRANGEMENT FOR PERFORMING THE METHOD - Google Patents
METHOD FOR ERROR-FREE DETECTION OF THE PERIPHERAL PULSE AND ARRANGEMENT FOR PERFORMING THE METHODInfo
- Publication number
- DE1962335B2 DE1962335B2 DE19691962335 DE1962335A DE1962335B2 DE 1962335 B2 DE1962335 B2 DE 1962335B2 DE 19691962335 DE19691962335 DE 19691962335 DE 1962335 A DE1962335 A DE 1962335A DE 1962335 B2 DE1962335 B2 DE 1962335B2
- Authority
- DE
- Germany
- Prior art keywords
- light
- arrangement
- pulse
- light source
- receiver
- 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
Links
- 238000000034 method Methods 0.000 title claims description 17
- 230000002093 peripheral effect Effects 0.000 title claims description 6
- 238000001514 detection method Methods 0.000 title claims description 5
- 239000004065 semiconductor Substances 0.000 claims description 2
- 238000005259 measurement Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 210000001519 tissue Anatomy 0.000 description 2
- 230000017531 blood circulation Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 210000005259 peripheral blood Anatomy 0.000 description 1
- 239000011886 peripheral blood Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 230000002792 vascular Effects 0.000 description 1
Classifications
-
- 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
-
- 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
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C19/00—Digital stores in which the information is moved stepwise, e.g. shift registers
- G11C19/18—Digital stores in which the information is moved stepwise, e.g. shift registers using capacitors as main elements of the stages
- G11C19/182—Digital 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
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Cardiology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Physics & Mathematics (AREA)
- Veterinary Medicine (AREA)
- Biophysics (AREA)
- Pathology (AREA)
- Public Health (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Physiology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
- Measuring And Recording Apparatus For Diagnosis (AREA)
Description
Die Erfindung betrifft ein Verfahren zur photoelektronischen Erfassung des peripheren Pulses mit Hilfe einer Lichtquelle und eines Lichtempfängen,.The invention relates to a method for photoelectronic detection of the peripheral pulse with the aid a light source and a light receiving ,.
Die Kontrolle der peripheren Durchblutung und der Pulsfrequenz ist für die Kreislaufdiagnose und -überwachung von großer Bedeutung. Hierzu hai es sich als fcweckmäßig erwiesen, die durch die Herztätigkeit verursachten und u. a. durch die Gefäßmuskulatur beeinflußten Volumenschwankungen in peripheren Gefäßen zu kontrollieren.The control of the peripheral blood flow and the pulse rate is for the circulatory diagnosis and monitoring of great importance. For this purpose, it has been shown to be appropriate to the action of the heart caused and i.a. Volume fluctuations in the peripheral, influenced by the vascular muscles Control vessels.
Es sind Verfahren bekannt, die hierzu die Absorbtion (des von einer Quelle ausgehenden Lichtes konstanter Intensität im Gewebe ausnützen (DT-Gbm 19 61 186 und H. Kresse: »Prinzipien und kritischer Vergleich einiger peripherer Pulsabnehmer«, Elektromedizin 13 (1968 :25-30). Ein schwerwiegender Nachteil der bisher bekannten Verfahren besteht darin, daß der Lichtempfänger auch auf Änderungen des Umgebungslichtes 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 bevorzugten Meßstellen, am Ohr, schwierig. Ein weiterer Nachteil der bekannten Verfahren besteht darin, daß die Licht konstanter Intensität aussendende Lichtquelle viel Wärme erzeugt Die zur Abfuhr der Wärme erforderliche große Oberfläche des Pulsaufnehmers steht der angestrebten Miniaturisierung entgegen.Methods are known which for this purpose make the absorption (of the light emanating from a source more constant Use intensity in the tissue (DT-Gbm 19 61 186 and H. Kresse: “Principles and critical comparison some peripheral pulse pickups ", Elektromedizin 13 (1968: 25-30). A serious disadvantage so far known method consists in the fact that the light receiver is also sensitive to changes in the ambient light responds, i.e. a possibly larger interference signal is superimposed on the useful signal. Will with such Facilities monitors the pulse rate, then z. B. false alarm when switching on the room lighting to be triggered. To these disturbances from ambient light fluctuations to switch off, the pulse sensor described and the measuring point must be covered by opaque material. This Covering is annoying and difficult at one of the preferred measuring points, the ear. Another disadvantage the known method consists in that the light source emitting light of constant intensity is much Generates heat The large surface of the pulse sensor required to dissipate the heat is available against the targeted miniaturization.
Ein weiterer Nachteil der bekannten Verfahren besteht darin, daß dem Ausgangssignal des Lichtempfängers oft Störspannungen, 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 interference voltages, e.g. B. by the network, which the light receiver or the Have taken up supply cables 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 problem of interference-free detection of the peripheral pulse enable, d. H. to switch off the influence of ambient light and electrical interference voltages and to avoid the heating of 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, störungsfreie Meßsignale zu benutzen. Die Quelle kann sinusmodulierte Signale in bestimmten zeitlichen Abständen bereitstellen oder auch mit Pulsmodulation arbeiten, insbesondere wird in beiden Fällen amplitudenmoduliertes Licht ausgesendet. Zur Vermeidung der Erwärmung der Meßstelle ist die Impulsdauer vorzugsweise kürzer als die Impulspause. Bei entsprechender Festlegung der Fühlerabmessungen ist die abzuführende Verlustleistung vernachlässigbar. Vorteilhafterweise können die von der Lichtquelle abgegebenen Lichtsignale Frequenzen enthalten, die so groß sind, daß in den dem Empfänger nachgeschalteten Verstärkern Nutzsignale und Störsignale aufgrund ihrer unterschiedlichen Frequenzen getrennt werden können.This object is achieved according to the invention in a method of the type described at the outset in that the light source emits modulated light in pulses. In an advantageous manner The method thus enables the use of interference-free measurement signals. The source can be sine-modulated Provide signals at certain time intervals or work with pulse modulation, in particular amplitude-modulated light is emitted in both cases. To avoid heating the Measuring point, the pulse duration is preferably shorter than the pulse pause. If the Sensor dimensions, the power loss to be dissipated is negligible. Advantageously, the emitted by the light source light signals contain frequencies that are so large that in the Receiver downstream amplifiers useful signals and interference signals due to their different Frequencies can be separated.
E;n 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 4 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 Signalspannung 8 wird nach Abtrennung des Gleichspannungsanteils im Verstärker 7 angehoben.E ; n 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 light pulses emanating from the diode are changed in intensity by a tissue 3 according to the absorption taking place there and converted by a photodiode 4 into voltage pulses, which are a measure of the pulse frequency. A downstream amplifier 5 suppresses the low frequency caused by interference, e.g. B. by an electrical light source, caused components of the input signal and forwards the amplified pulses to a peak voltage memory 6. The level of the signal voltage 8 present at the output of the peak voltage store 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, medical measurement technology gains for the first time in an advantageous manner Way an exact method for the undisturbed detection of the pulse frequency. The measurement of the very small Signals is advantageously designed in such a way that the doctor or the caring person can find the value of interest to him can get displayed. The method is ideally suited for the central monitoring of several Patients with a dialing device.
'Hierzu 1 Blatt Zeichnungen1 sheet of drawings
Claims (6)
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 DE1962335A1 (en) | 1972-03-02 |
| DE1962335B2 true 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 (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0198573A1 (en) * | 1985-02-15 | 1986-10-22 | Tsuyama Mfg. Co., Ltd. | Pulse counter |
| 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. |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3980075A (en) * | 1973-02-08 | 1976-09-14 | Audronics, Inc. | Photoelectric physiological measuring apparatus |
| 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 |
| 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 |
| DE4238641C2 (en) * | 1992-11-16 | 1994-12-08 | Kraus Manfred | Device and working method for determining and evaluating the physiological state of vascular systems |
| 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 |
-
1969
- 1969-12-12 DE DE19691962335 patent/DE1962335B2/en not_active Ceased
-
1970
- 1970-07-24 CH CH1122470A patent/CH506997A/en not_active IP Right Cessation
- 1970-12-09 FR FR7044268A patent/FR2073138A5/en not_active Expired
- 1970-12-10 BE BE760170A patent/BE760170A/en unknown
- 1970-12-10 NL NL7018013A patent/NL7018013A/xx unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0198573A1 (en) * | 1985-02-15 | 1986-10-22 | Tsuyama Mfg. Co., Ltd. | Pulse counter |
| 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. |
Also Published As
| Publication number | Publication date |
|---|---|
| CH506997A (en) | 1971-05-15 |
| DE1962335A1 (en) | 1972-03-02 |
| NL7018013A (en) | 1971-06-15 |
| BE760170A (en) | 1971-05-17 |
| FR2073138A5 (en) | 1971-09-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8235 | Patent refused |