EP2547251A2 - Procédé permettant de déterminer l'activité du parasympathique et/ou sympathique du système nerveux autonome d'un être vivant - Google Patents

Procédé permettant de déterminer l'activité du parasympathique et/ou sympathique du système nerveux autonome d'un être vivant

Info

Publication number
EP2547251A2
EP2547251A2 EP11724520A EP11724520A EP2547251A2 EP 2547251 A2 EP2547251 A2 EP 2547251A2 EP 11724520 A EP11724520 A EP 11724520A EP 11724520 A EP11724520 A EP 11724520A EP 2547251 A2 EP2547251 A2 EP 2547251A2
Authority
EP
European Patent Office
Prior art keywords
activity
nervous system
determined
living
determining
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.)
Withdrawn
Application number
EP11724520A
Other languages
German (de)
English (en)
Inventor
Werner Wittling
Ralf Arne Wittling
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.)
WITTLING, RALF ARNE
Original Assignee
Wittling Ralf Arne
Wittling Werner
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 Wittling Ralf Arne, Wittling Werner filed Critical Wittling Ralf Arne
Publication of EP2547251A2 publication Critical patent/EP2547251A2/fr
Withdrawn legal-status Critical Current

Links

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
    • A61B5/0245—Detecting, measuring or recording pulse rate or heart rate by using sensing means generating electric signals, i.e. ECG signals
    • 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
    • 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]
    • A61B5/346—Analysis of electrocardiograms
    • A61B5/347—Detecting the frequency distribution of signals
    • 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]
    • A61B5/346—Analysis of electrocardiograms
    • A61B5/349—Detecting specific parameters of the electrocardiograph cycle
    • A61B5/352—Detecting R peaks, e.g. for synchronising diagnostic apparatus; Estimating R-R interval
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/40—Detecting, measuring or recording for evaluating the nervous system
    • A61B5/4029—Detecting, measuring or recording for evaluating the nervous system for evaluating the peripheral nervous systems
    • A61B5/4035—Evaluating the autonomic nervous system
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/48—Other medical applications
    • A61B5/4836—Diagnosis combined with treatment in closed-loop systems or methods
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/48—Other medical applications
    • A61B5/4884—Other medical applications inducing physiological or psychological stress, e.g. applications for stress testing

Definitions

  • the invention relates to a method for determining the activity of the parasympathetic nervous system and / or the sympathetic nervous system of a living organism, in particular of a human, in which a conditional feature of the living being is determined and recorded and the activity is determined from the conditional feature.
  • the physical condition of a living being e.g. his health, fitness or a state of stress, is u.a. determined by his ability to adapt to and withstand burdens. Such an adaptation takes place via the autonomic nervous system, which regulates the beat rate, respiration, blood pressure, digestion and metabolism depending on the respective load.
  • a branch of the autonomic nervous system whose activation promotes performance and responsiveness and activation of energy reserves is called sympathetic.
  • the activation of another branch of the autonomic nervous system which acts as an antagonist to the sympathetic nervous system, promotes rest and recovery as well as energy storage and is called the parasympathetic nervous system. It is known from numerous studies that the activity of the sympathetic and parasympathetic nervous system can be used to assess the performance of humans. Since effects of activities of the sympathetic or parasympathetic, e.g. By assigning fluctuations in the time intervals between the heart beats, the respective activity can be determined by their measurement.
  • an electrocardiogram (ECG) of a person is created at rest over a period of several minutes. Subsequently, the time intervals are analyzed by fast Fourier transformation (Fast Fourier Transformation, FFT) and a frequency spectrum is created.
  • FFT Fast Fourier Transformation
  • a low-frequency range of this frequency spectrum namely 0.04 to 0.15 Hz, can be assigned to the activity of the sympathetic, since an influence of the heartbeat by the sympathetic nervous system takes place in a relatively slow rhythm.
  • a higher frequency region, 0.15 to 0.4 Hz is associated with parasympathetic activity, which affects the heartbeat at a faster rate.
  • the invention has for its object to provide a method by which the physical condition of the animal is to assess quickly and easily. According to the invention, this object is achieved in that the activity of the parasympathetic nervous system and / or the sympathetic nervous system is determined as a function of time.
  • the state feature is expediently a sequence of heart beats of the living being.
  • the activity of the parasympathetic or sympathetic nervous system can be determined by analyzing the time intervals of the heart beats.
  • an electrocardiogram is created and the heartbeat is preferably determined based on first positive rashes of a ventricular excitation (R-rash).
  • R-rash a ventricular excitation
  • erroneous signals of the measurement are corrected.
  • a pulse can be taken to determine the heartbeat.
  • the time intervals are analyzed by means of a complex demodulation method (CDM).
  • CDM complex demodulation method
  • a time series X (t) can be represented as follows:
  • the frequency band to be analyzed is shifted to zero and then filtered low-pass.
  • the variation of the amplitude of the complex demodulation maps the intensity of the signal by the frequency f o.
  • the variation of the phase describes the relative frequency deviation from the frequency fo. While the determination of only the activity of the parasympathetic nervous system, which is determined by means of the method of complex modulation of specific frequencies of 0.15 to 0.4 Hz and the frequencies of associated amplitudes, is sufficient for an adequately meaningful result, alternatively or additionally the activity of the sympathetic, preferably on the basis of the frequencies of 0.04 to 0.15 Hz and the frequencies associated amplitudes determined. It is possible to determine a response of the sympathetic to the stimulation and to relate it to the activity of the parasympathetic nervous system.
  • the activity of the parasympathetic nervous system and / or the sympathetic nervous system can be determined during a period before, during and / or after a stimulation of the living being, in a particularly preferred embodiment of the invention it is analyzed by analyzing the time intervals within a change, preferably determines a termination or attenuation, the stimulation subsequent period, which is preferably at least 40 seconds.
  • the attenuation of the stimulation can e.g. In the case of physical exertion, only a considerably lower power, for example ⁇ 70 W, or no more power is provided after a comparatively high power, for example> 300 W.
  • the change in the activity of the parasympathetic nervous system following the change in stimulation can be used to assess the physical condition.
  • a development of the physical condition for example after intake of medicaments or other substances, or of fitness, for example after training with a specific training method.
  • Results of Determination of the activity of the parasympathetic or sympathetic nervous system is expediently assessed taking into account the age of the animal and / or can be set in relation to standard values.
  • the stimulation is carried out depending on the activity of the parasympathetic and / or the sympathetic.
  • the duration and / or the strength of the stimulation can be adapted in this way to a reaction of the living being to the stimulation.
  • Interaction between the stimulation and the activity of the parasympathetic and / or the sympathetic can be used for the assessment.
  • the stimulation is expediently terminated when the parasympathetic nervous system and / or the sympathetic nervous system have or have a specific activity. It is conceivable to stop the stimulation if the respective activity has a certain value for a certain duration, preferably for 10 seconds. Preferably, the stimulation is terminated when the parasympathetic nervous system is not active for the duration.
  • the stimulation may be performed according to a predetermined procedure, wherein the animal is preferably loaded by physical exertion on an ergometer.
  • the power to be provided is thereby increased, preferably stepwise, in a manner known per se from load E Gs, up to a certain maximum power.
  • the invention further relates to a device for determining an activity of the parasympathetic nervous system and / or the sympathetic nervous system of a living being, in particular of a human having a means for determining and / or receiving a state feature of the animal and a computer connected to the means is provided for determining the activity from the state feature.
  • the measurements made with the ECG device are transmitted to the computer and after the measurement by means of a software measurement results by means of the fast Fourier transform analyzed and, as described above, the frequency spectrum of the activity of the sympathetic or parasympathetic associated ,
  • the computer is provided, preferably by means of a corresponding program, for a time-dependent determination of the activity of the parasympathetic nervous system and / or of the sympathetic nervous system.
  • the device is suitable for assessing the physical condition, e.g. his health, his fitness or a state of stress, of the living being.
  • the means for determining the state feature of a device for measuring heartbeats of the living being preferably a heart rate monitor or an ECG device.
  • the computer for determining the activity of the time intervals between the heartbeats, preferably from information obtained by means of the ECG device is set up.
  • the computer for determining the activity by a method of complex demodulation (CDM), preferably on the basis of frequencies of 0, 15 to 0.4 Hz and / or 0.04 to 0, 15 Hz and of these frequencies assigned amplitudes provided.
  • CDM complex demodulation
  • the computer may be configured to determine activities at frequencies of 0.003 to 0.04 Hz.
  • the device expediently comprises a device for stimulating the living being, preferably an ergometer, which is preferably connected to the computer.
  • a device for stimulating the living being preferably an ergometer, which is preferably connected to the computer.
  • the ergometer With the ergometer, physical work performed by the living being can be determined and / or the living being can be given a physical work to be performed.
  • the data measured with the ergometer are transferable to the computer and the computer is possibly set up to control the ergometer and in particular to adjust the physical work to be performed.
  • the device for stimulation and in particular the intensity of the stimulation is controllable depending on the activity of the parasympathetic and / or the sympathetic.
  • the physical work to be performed can be adapted to the activity of the parasympathetic nervous system.
  • the computer for determining the activity of the parasympathetic nervous system and / or the sympathetic nervous system from the measurement of the conditional feature is in one to stop the stimulation of the living being subsequent period, which preferably takes at least 40 seconds, provided.
  • the computer is a mobile device, e.g. a laptop or a wearable device such as a laptop a smartphone or of such a small size that it, e.g. like a watch, can be attached to the body.
  • the heartbeats can be determined in a manner known per se with a chest belt which determines the heart beats via two integrated skin electrodes.
  • the chest belt is suitably connected to the computer in such a way that certain information can be transmitted to the computer by means of the chest belt, e.g. by radio.
  • the method described or the device described is used for carrying out a biofeedback method, in which the activity of the parasympathetic and / or the sympathetic of the human is measured and corresponding measurement results, e.g. on a screen, continuously displayed so that the person can watch them.
  • a biofeedback method in which the activity of the parasympathetic and / or the sympathetic of the human is measured and corresponding measurement results, e.g. on a screen, continuously displayed so that the person can watch them.
  • this method it is possible to learn the activity of the parasympathetic and / or the sympathetic, e.g. by breathing technique, autogenic training or the like.
  • the method and apparatus for determining an effect and / or an influence on the physical condition of the administration of medicaments or other substances e.g. Caffeine, alcohol or nicotine
  • an effect of relaxation procedures e.g. Respiratory therapy, acupuncture, yoga, or progressive muscle relaxation, an effect of stress, or responding to advertising messages, especially for market research purposes.
  • the method or device can be used for finding, possibly determining, an infection, hypertension, cholesterol change or an inflammatory process.
  • Another use is a continuous assessment of a person's ability to drive or operate a vehicle.
  • the method or apparatus according to the physical condition is usable for controlling parameters of an environment of the living being, eg, brightness, coloring, or sounds.
  • the device is suitable moderately connected to a control device with which the parameters can be adjusted.
  • the apparatus or method may be used to affect interactive computer games or television or video films.
  • FIG. 1 shows schematically a device according to the invention
  • Fig. 2 is a graph showing results of measurements after
  • Figures 3 to 5 are diagrams showing results of a study in which the method according to the invention was used.
  • a device according to the invention comprising a bicycle ergometer 1, an ECG device 2, a computer 3 with a screen 4 is shown in FIG.
  • a person 5 seated on the bicycle ergometer is also shown schematically.
  • the computer 3 is connected to the bicycle ergometer 1 such that physical performance provided by the person 5 can be displayed via the screen 4 and stored in a time-dependent manner. It is also possible with the computer 3 of the person 5 to specify a performance to be performed. For this purpose, the computer 3 can also set the power to be provided on the bicycle ergometer 1, for example by increasing a resistance applied to pedals of the bicycle ergometer 1.
  • ergometers As an alternative to the bicycle ergometer, other types of ergometers can be used, such as elliptical machines, rowing ergometers, treadmills and exercise bikes.
  • the ECG device 2 comprises electrodes arranged on the body surface of the person 5 and is also connected to the computer 3. An electrocardiogram created with the ECG device 2 is transferred to the computer 3 and stored there.
  • the device according to the invention may have a device for optical and / or mechanical pulse removal. It comes in particular known devices such as a chest strap or arranged on the handles of the bicycle ergometer sensors in question.
  • a program is executed on the computer which is set up for the storage and evaluation of measurement results and display of the measurement results and evaluations. Furthermore, it guides person 5 through the process.
  • the person 5 in per se from exercise ECGs known manner by stepping the pedals on the bicycle ergometer 1, a gradually increasing performance. Within the first minute 30 W will be provided and then the performance will be increased by 150 W every minute, so that within the fifth minute 150 W will be provided. At the end of the fifth minute, the person 5 stops pedaling and remains at rest and their heartbeat is recorded. Alternatively, the person 5 at a much lower load ⁇ 70 W, preferably ⁇ 50 W, continue to occur.
  • the power can be increased continuously.
  • the duration of the load e.g. Based on an estimate of the physical performance of the person 5, be changed.
  • the measurement results are stored, the measurement result is examined for possibly occurring incorrect measurements and these incorrect measurements are corrected. Subsequently, an analysis with the method of complex demodulation (CDM) is performed. It is in the rhythm of heartbeats superimposed frequencies and these frequencies to be assigned amplitudes determined and an activity of the parasympathetic, which is in the frequency range of 0, 15 to 0.4 Hz, and possibly the sympathetic, in a frequency range of 0.04 to 0.15 Hz is assigned. A course of the respective activity can be graphically displayed on the screen 4 as a function of time, as shown for example in the diagram according to FIG. 2.
  • CDM complex demodulation
  • the software can in addition to the results of the analysis of the physical characteristics of the person indicate 5 appropriate normative values, in relation to which the fitness of the person can be assessed.
  • FIG. 2 by means of the method described, specific activity of the parasympathetic nervous system is shown for differently well-trained persons A, B, C, D and E as a function of the time after completion of the above-described physical stress.
  • Person A drives more than 9 hours
  • person B between 5 and 9 hours
  • person C between 2 and 5 hours
  • person D between 0.5 and 2 hours
  • person E less than 0.5 hours of sport per week.
  • distinct differences in the temporal course of the activity of the parasympathetic nervous system can be seen between the differently well-trained persons.
  • the rate of increase described above is significantly less than that of the other subjects in subjects who exercise only up to 2.5 hours per week. Further, the rate of increase in subjects who do 4.5 to 7.5 hours of exercise per week is higher than that of the subject who does only 3-4 hours of exercise per week. Similar differences can also be observed for the maximum magnitude of the parasympathetic activity amplitude shown in FIG. It can be seen from the diagram of FIG. 5 that the said rise time is also significantly higher for less active people than for the better trained persons.
  • the method according to the invention is suitable both for the one-time assessment of the physical condition of a person and, in particular, for monitoring the condition over longer periods of time, wherein the method is carried out at regular intervals and the results are to be compared with one another. Thus, too little activation of the parasympathetic nervous system gives an early indication of developing cardiovascular diseases.
  • the effect of drugs or therapies or the effectiveness of a particular training method can be assessed.
  • the device according to the invention can be adapted to the respective species.
  • the activity of the parasympathetic nervous system and possibly the sympathetic of the person 5 is already determined during and possibly before a first load on the person 5 on the bicycle ergometer 1.
  • the activity of the parasympathetic nervous system before or at the beginning of the exercise, as well as its response to the physical stress, in particular its change and / or the time it takes to reach a certain activity, in particular depending on the work performed or to be performed, is a measure of the physical fitness of the person 5.
  • One measure is e.g. the rate of descent of the parasympathetic nervous system, measured as the ratio of the activity before or at the beginning of the exercise and the duration of inactivity of the parasympathetic nervous system.
  • the information obtained for the activity of the parasympathetic nervous system during the first load can be used to control the size of the power to be performed by the person 5.
  • the initially described stepwise increasing performance to be performed on the bicycle ergometer for example, be terminated exactly when the parasympathetic nervous system over a period of, for example, 10 seconds has a certain activity or is no longer active.
  • the burden of a less well-trained person is then ended earlier than in a well-trained.
  • the first load may be followed by the measurement described above at rest or at low load.
  • the computer 3 In order to be able to control the performance to be performed as a function of the activity of the parasympathetic nervous system, the computer 3 is set up in such a way that the performance to be performed can be directly controlled on the basis of the evaluations of the measurement results, ie the activity of the parasympathetic system determined from the measurement results , The computer 3 determines the activity of the parasympathetic nervous system and controls the bicycle ergometer 1 as a function of the measurement, that is to say during the exercise of the person 5 on the bicycle ergometer 1.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Animal Behavior & Ethology (AREA)
  • Public Health (AREA)
  • Cardiology (AREA)
  • Biophysics (AREA)
  • Pathology (AREA)
  • Veterinary Medicine (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • Physiology (AREA)
  • Neurology (AREA)
  • Hospice & Palliative Care (AREA)
  • Signal Processing (AREA)
  • Child & Adolescent Psychology (AREA)
  • Developmental Disabilities (AREA)
  • Neurosurgery (AREA)
  • Psychiatry (AREA)
  • Psychology (AREA)
  • Social Psychology (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
  • Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)

Abstract

L'invention concerne un procédé permettant de déterminer l'activité du parasympathique ou sympathique du système nerveux autonome d'un être vivant, notamment d'un être humain, selon lequel on détermine une caractéristique d'état de l'être vivant et on détermine l'activité à partir de cette caractéristique d'état. Selon l'invention, on détermine l'activité du parasympathique et/ou sympathique en fonction du temps. De manière avantageuse, la caractéristique d'état est une série de battements cardiaques de l'être vivant et on détermine l'activité en analysant les intervalles de temps entre les battements cardiaques. A cet effet, on établit de préférence une mesure de fréquence cardiaque de l'être vivant et on détermine le battement cardiaque à l'aide des premiers pics positifs d'un mouvement ventriculaire (pic R). L'invention concerne en outre un dispositif permettant de mettre en œuvre le procédé.
EP11724520A 2010-03-19 2011-03-18 Procédé permettant de déterminer l'activité du parasympathique et/ou sympathique du système nerveux autonome d'un être vivant Withdrawn EP2547251A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102010012196 2010-03-19
DE102010034055A DE102010034055A1 (de) 2010-03-19 2010-08-11 Verfahren zur Beurteilung der Gesundheit eines Lebewesens
PCT/DE2011/000291 WO2011113428A2 (fr) 2010-03-19 2011-03-18 Procédé permettant de déterminer l'activité du parasympathique et/ou sympathique du système nerveux autonome d'un être vivant

Publications (1)

Publication Number Publication Date
EP2547251A2 true EP2547251A2 (fr) 2013-01-23

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Country Status (4)

Country Link
US (1) US20130009779A1 (fr)
EP (1) EP2547251A2 (fr)
DE (2) DE102010034055A1 (fr)
WO (1) WO2011113428A2 (fr)

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Also Published As

Publication number Publication date
US20130009779A1 (en) 2013-01-10
WO2011113428A8 (fr) 2011-11-17
WO2011113428A2 (fr) 2011-09-22
DE102010034055A1 (de) 2011-09-22
WO2011113428A3 (fr) 2012-03-01
DE112011100958A5 (de) 2013-01-24

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