DE102006017970A1 - Medical parameter e.g. heart frequency, measuring device for sportsman, has inductor that is placed in sports shoe or around metatarsal in shoe, where parameter is derived from strength of low frequency changes of impedance of inductor - Google Patents

Medical parameter e.g. heart frequency, measuring device for sportsman, has inductor that is placed in sports shoe or around metatarsal in shoe, where parameter is derived from strength of low frequency changes of impedance of inductor

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Publication number
DE102006017970A1
DE102006017970A1 DE200610017970 DE102006017970A DE102006017970A1 DE 102006017970 A1 DE102006017970 A1 DE 102006017970A1 DE 200610017970 DE200610017970 DE 200610017970 DE 102006017970 A DE102006017970 A DE 102006017970A DE 102006017970 A1 DE102006017970 A1 DE 102006017970A1
Authority
DE
Germany
Prior art keywords
characterized
device according
inductance
measurement
particular
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Withdrawn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
DE200610017970
Other languages
German (de)
Inventor
Oliver Bartels
Original Assignee
Oliver Bartels
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 Oliver Bartels filed Critical Oliver Bartels
Priority to DE200610017970 priority Critical patent/DE102006017970A1/en
Publication of DE102006017970A1 publication Critical patent/DE102006017970A1/en
Application status is Withdrawn legal-status Critical

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Detecting, measuring or recording for diagnostic purposes; Identification of persons
    • A61B5/05Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radiowaves
    • A61B5/053Measuring electrical impedance or conductance of a portion of the body
    • AHUMAN NECESSITIES
    • A43FOOTWEAR
    • A43BCHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B1/00Footwear characterised by the material
    • A43B1/0054Footwear provided with magnets, magnetic parts or magnetic substances
    • AHUMAN NECESSITIES
    • A43FOOTWEAR
    • A43BCHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B5/00Footwear for sporting purposes
    • AHUMAN NECESSITIES
    • A43FOOTWEAR
    • A43DMACHINES, TOOLS, EQUIPMENT OR METHODS FOR MANUFACTURING OR REPAIRING FOOTWEAR
    • A43D1/00Foot or last measuring devices; Measuring devices for shoe parts
    • A43D1/02Foot-measuring devices
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Detecting, measuring or recording 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
    • A61B5/00Detecting, measuring or recording for diagnostic purposes; Identification of persons
    • A61B5/68Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6801Arrangements 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
    • A61B5/6802Sensor mounted on worn items
    • A61B5/6804Garments; Clothes
    • A61B5/6807Footwear
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Detecting, measuring or recording for diagnostic purposes; Identification of persons
    • A61B5/0002Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Detecting, measuring or recording 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 infra-red radiation
    • A61B5/02427Details of sensor
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Detecting, measuring or recording 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
    • A61B5/00Detecting, measuring or recording for diagnostic purposes; Identification of persons
    • A61B5/05Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radiowaves
    • A61B5/053Measuring electrical impedance or conductance of a portion of the body
    • A61B5/0537Measuring body composition by impedance, e.g. tissue hydration or fat content
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Detecting, measuring or recording for diagnostic purposes; Identification of persons
    • A61B5/145Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Detecting, measuring or recording for diagnostic purposes; Identification of persons
    • A61B5/22Ergometry; Measuring muscular strength or the force of a muscular blow
    • A61B5/221Ergometry, e.g. by using bicycle type apparatus
    • A61B5/222Ergometry, e.g. by using bicycle type apparatus combined with detection or measurement of physiological parameters, e.g. heart rate

Abstract

The device has an inductor (L1) that is placed in a sports shoe or around a metatarsal in the shoe. A complex impedance of the inductor or a transmission parameter of the inductor representing the impedance is measured by an impedance measuring switch with measuring frequency. Low frequency changes of the complex impedance are determined by an evaluation unit (IC2). A medical parameter e.g. heart frequency, is derived from a temporal flow or strength of the changes. The inductor is provided as a transmission antenna that transmits a pulse signal to an external display unit.

Description

  • Of the Invention is based on the object, the heart rate of an athlete while the sports activity preferably without additional Stress through a chest belt, etc. and other interests derive medical parameters.
  • The Heart rate is for training control of varied interest, so will typically be first the anerobic threshold, for example, based on age formulas or of an individual medical test and then it will Based on this and other parameters heart rate zones for as possible optimal training predetermined.
  • According to the prior art, two methods are currently used to determine the heart rate electronically during exercise:
    In the ECG variant, the voltages and currents due to the activity of the heart muscle are dissipated by electrodes near the heart, a typical representative of this technique is the Polar system with chest strap. A description of a typical ECG system can be found in, for example, EP0861045B1 ,
  • adversely in this solution is that for a reliable one Pulse determination either worn the athlete stressing chest belt must be or for pulse measurements without belt, the measurement only for Time of placing the finger of the other hand on the wrist worn watch can be determined or otherwise electrodes are to be worn. Next to that is a provision other medical parameters such as the anerobic threshold from the Variation of the heart rate possible, since it is an indirect determination based on a model, This is not special.
  • A fundamentally different procedure is the transillumination of the tissue with visible or infrared light and the measurement of transmittance variations. It goes without saying that a direct fluoroscopy maximum on thin body parts as the fingertips or the earlobe is possible, therefore, is the wearing such a measuring device again with a certain annoyance connected or the measurement is only for a short time, for example when placing a finger on the sensor of a heart rate monitor.
  • One Another known method for heart rate measurement is the interception of the Pulse noise, for example during a blood pressure measurement. As the blood pressure measurement with the inflation a cuff is typically connected to the arm, this separates Type of pulse measurement for the Use during an active sports activity in general.
  • Farther The known methods are not capable of oxygen saturation of the blood during the sports activity Non-invasively directly measure, even reliable procedures such as a lactate test require a blood sample.
  • Of the Invention is based on the object, the heart rate and more medical parameters, in particular oxygen saturation of blood, through an easily integrated into the clothing of the athlete gauge to determine which without additional Electrodes in the chest area gets along.
  • The problem is solved according to the invention by the device described in claim 1, the function of which will be explained below with reference to an exemplary embodiment according to FIG. 1:
    The inductance L1 is placed in a particularly advantageous embodiment according to dependent claim 2 in the shoe sole or around the midfoot in a sports shoe. This eliminates the need to wear an additional chest strap. An alternative possibility is the integration in a wristwatch according to dependent claim 3.
  • Consequently includes the inductance the body tissue, which supplies oxygen-rich blood to the beat of the heartbeat becomes. In return, it flows the oxygen-poor blood is relatively continuous.
  • It It is known that oxygen-rich blood has diamagnetic properties oxygenated blood has paramagnetic properties having. This changes on the one hand to a very small extent, the inductance. An equally essential point is that due to the particulate structure of the red blood cells the outflowing Blood a local inhomogeneity of the magnetic field, which affects the quality of the inductance and thus in a fluctuation especially of the resistive share the complex impedance of the inductance. By the inclusion according to the invention both the inductive reactive and the reactive real part the inductance the influence of the pulse-induced fluctuations first becomes part of the measuring procedure determinable with the necessary security.
  • The complex impedance with real and imaginary part is determined in the exemplary embodiment by applying a test signal and measuring the phase shift of a response signal passing through the inductance at different frequencies, the frequency dependence of the impedance can therefore also be included in the evaluation. For such impedance meters Meanwhile, completely integrated circuits IC1 are available, as well as a discrete design with a DDS generator and A / D converter is conceivable.
  • The Measurement data according to the invention to a Transmitter IC2 transmitted, this will typically be a microcontroller or digital signal processor (DSP) act. This derives from the fluctuations the complex impedance then, for example, a pulse signal. This can for example, by a correlation, in particular autocorrelation according to dependent claim 9 happened.
  • Farther is the size of the fluctuation of the complex impedance in a direct relationship with the degree the oxygen saturation of the Bluts, according to dependent claim 8, this parameter can also be calculated from the difference between the systoles and diastole phase are derived.
  • Especially advantageous is the transmission of the Pulse signal by radio (transmitter XM1 in the picture), for example a pulse watch PU1, this can also already in the shoe sole integrated inductance in the particularly advantageous embodiment of the invention according to dependent claim 4 are used. If the inductance is also used as a receiving antenna will, can in this way, for example, calibration data in the processor-controlled Evaluation be introduced. All the electronics including the Sender can be accommodated, for example, in the heel of the sports shoe become.
  • simultaneously can have the same inductance nor to charge an accumulator (e.g., light lithium ions Battery) are used when the sports shoes after use a charger be turned off, this provides an inductive energy transfer according to dependent claim 5 on.
  • Farther the inductance is suitable also in addition for receiving RFID signals, for example, are in competition Transponder attached to the shoe (system "ChampionChip"), here can the inductance according to dependent claim 6 additional take over the function of the transmitting and receiving antenna.
  • at high-order Systems offers itself, the data of two measuring devices from the to correlate left and right shoe by radio according to dependent claim 7 and to combine, thereby further increasing measurement accuracy reached.
  • Further advantageous possibilities to increase The measuring accuracy consists in the introduction of suitable materials in the inductance or in the use of a system of inductors. According to dependent claim 10 would be an additional Magnetization per permanent magnet conceivable, from this can also additionally derived by induction further response signals from the inductance become. Also possible is the increase in sensitivity due to premagnetization of a Materials with a strong nonlinearity of permeability and reinforcement of the Measuring signal by measurement in a particularly non-linear area according to dependent claim 11th
  • in this connection is also the use of a system of inductors according to dependent claim 12 and the indirect measurement over another transmission parameter conceivable. For example, a fundamental tone can be fed in an inductance and in a second one by a nonlinearity of existing ones Measured materials resulting overtone according to dependent claim 13 as is a simple measurement of the transmission behavior or the transfer function a transformer consisting of two inductors conceivable, for example, over the parameter h21 or s21.
  • to further increase Measuring accuracy is also the inclusion of other magnetic sensors conceivable, for example, the use of a Hall sensor according to dependent claim 14 for determining the response signal.
  • Farther is in a particular embodiment of the invention, the measurement the resonant frequency of a resonant circuit consisting of the measuring inductance and a another capacitor according to dependent claim 15 by using impedance measurements at several test frequencies, thereby can already low permeability changes reliable due to blood flow be determined.
  • When useful Additional function is the use of the already existing Impedance measuring circuit in addition for the determination of body fat and body water content according to dependent claim 16, since this measurement does not have to be continuous, it would be here For example, conceivable to attach contact surfaces on the sides of the shoes, which when compressing both shoes a measuring circuit between left leg over the body to the right leg and back again to manufacture the impedance measuring circuit in a shoe over the contact surfaces.
  • Corresponding Unteranspr 17 may offer itself as a further additional function, the already existing transmission circuit additionally to provide information from an accelerometer, to determine the distance and running speed.
  • To secure the data transmission offers According to dependent claim 18, the use of a device-internal clock for providing the data with a time stamp, thereby the time-shifted transmission is also possible as the creation of redundancy by multiple transmission or the repetition of a transmission on request by the receiver in the context of using a bidirectional transmission protocol , Control and configuration information such as eg clock commands or calibration data for the oxygen uptake measurement or the distance measurement can be transmitted to the device in the reverse direction via the latter, for example.
  • of course is according to dependent claim 19 also the combination with a conventional ECG pulse measurement method conceivable in systems in which the user primarily to the additional interested in medical data such as oxygen uptake capacity is.

Claims (19)

  1. Device for measuring the heart rate or other medical parameters, characterized in that (1) at least one inductor is placed around or next to a limb of the wearer. (2) the complex impedance of this inductance or at least one complex impedance-representing transmission parameter of the inductance or a combination of several inductances is regularly measured by at least one impedance measurement circuit at at least one measurement frequency. (3) low-frequency changes of the complex impedance can be determined by at least one transmitter. (4) the heart rate or other medical parameters are derived from the time course or strength of these changes.
  2. device according to claim 1, characterized in that the inductance in one Sports shoe, especially in the sole or around the metatarsal or toe area or around the manhole is attached around.
  3. device according to claim 1, characterized in that the inductance in one Wrist watch or a wrist-worn pulse monitor becomes.
  4. device according to claim 1, characterized in that the inductance simultaneously as a transmitting antenna for the pulse signal or other measurement data to an external display unit, pulse watch in particular, or as a receiving antenna for control, configuration or calibration data is shared.
  5. device according to claim 1, characterized in that the inductance simultaneously as receiver for inductively transmitted electromagnetic energy for charging a rechargeable battery for Operation of the device is used.
  6. device according to claim 1, characterized in that the inductance simultaneously as transmitting and receiving antenna for third Signals, in particular for identification of the athlete and determination of whose competition time (RFID) is used.
  7. device according to claim 1, characterized in that the signals from several Devices, for example from both sports shoes, to achieve a higher accuracy by data transmission between the devices or hindsight in a central display device, in particular by correlation or a weighted average.
  8. device according to claim 1, characterized in that as a medical Additional parameters the oxygen uptake of blood from the difference of the complex Impedance of inductance between the systole and the diastolic phase of the pulse is derived.
  9. device according to claim 1, characterized in that the heart rate by correlation, in particular autocorrelation, of the complex impedance the inductance is determined in the transmitter.
  10. device according to claim 1, characterized in that an additional Magnetization of the bloodstream to be measured by at least one magnet, in particular permanent magnet is made.
  11. device according to claim 1, characterized in that the sensitivity the measurement by measurement in the kink of a magnetic hysteresis curve is increased, this can suitable building materials are incorporated in the inductance.
  12. device according to claim 1, characterized in that a system of at least two inductors is used for the measurement, in an inductance is from the impedance measuring circuit a test signal is fed in at least one measuring frequency and from the second inductance measure the response signal in relation to the signal fed in, especially after phase and amplitude.
  13. Apparatus according to claim 1 or 12, characterized in that, instead of the fundamental of the response signal, a harmonic produced by a non-linearity or simultaneous feed several frequencies is measured by a non-linearity resulting difference tone.
  14. device according to claim 1, characterized in that for the exact determination the complex impedance in addition another magnetic field sensor, in particular Hall sensor used becomes.
  15. device according to claim 1 or 12, characterized in that at least an inductance in particular in conjunction with at least one capacitor, a resonant circuit forms, whose resonant frequency is determined, in particular by Impedance measurement with a variety of test frequencies and usage a common one Approximation method.
  16. device according to claim 1 or 2, characterized in that the impedance measuring circuit additionally by means of a switch to suitable electrodes for measuring the Body fat-, body water and muscle fraction is used by bioimpedance analysis, in particular can the over the body leading measuring circuit over to the Side surfaces of the Shoes existing contact surfaces closed when squeezing both shoes and so the measurement to be activated.
  17. device according to claim 1, characterized in that in addition a Acceleration sensor in the device for measuring the speed or step size and derived therefrom the route is used.
  18. device according to claim 1, characterized in that in addition a Clock in the device to mark the measured data with a time stamp , the data thus marked, in particular pulse signals, can then cached and transferred at a later date become. This also makes the use of backup protocols allows which with transmission errors or to provide redundancy, the data multiple times or after a transmission error retransmitted.
  19. device according to claim 1, characterized in that to increase the Accuracy of measuring other medical parameters, in particular the oxygen saturation of blood, measuring with a conventional heart rate measurement, in particular ECG or infrared measurement, the acquired pulse signal is synchronized.
DE200610017970 2006-04-13 2006-04-13 Medical parameter e.g. heart frequency, measuring device for sportsman, has inductor that is placed in sports shoe or around metatarsal in shoe, where parameter is derived from strength of low frequency changes of impedance of inductor Withdrawn DE102006017970A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE200610017970 DE102006017970A1 (en) 2006-04-13 2006-04-13 Medical parameter e.g. heart frequency, measuring device for sportsman, has inductor that is placed in sports shoe or around metatarsal in shoe, where parameter is derived from strength of low frequency changes of impedance of inductor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200610017970 DE102006017970A1 (en) 2006-04-13 2006-04-13 Medical parameter e.g. heart frequency, measuring device for sportsman, has inductor that is placed in sports shoe or around metatarsal in shoe, where parameter is derived from strength of low frequency changes of impedance of inductor

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DE102006017970A1 true DE102006017970A1 (en) 2007-10-18

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DE200610017970 Withdrawn DE102006017970A1 (en) 2006-04-13 2006-04-13 Medical parameter e.g. heart frequency, measuring device for sportsman, has inductor that is placed in sports shoe or around metatarsal in shoe, where parameter is derived from strength of low frequency changes of impedance of inductor

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2752158A1 (en) * 2011-08-30 2014-07-09 Universidad De Extremadura Unit, modular system and method for measuring, processing and remotely monitoring electrical bioimpedance
CN104757965A (en) * 2015-04-30 2015-07-08 张释文 DSP-based heart rate measurement device
US9107644B2 (en) 2013-07-05 2015-08-18 James Tyler Frix Continuous transdermal monitoring system and method
US9339236B2 (en) 2013-07-05 2016-05-17 James Tyler Frix Continuous transdermal monitoring system and method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD89259B (en) *
US5360008A (en) * 1992-11-18 1994-11-01 Campbell Jr William G Respiratory and cardiac monitor
WO2001005304A1 (en) * 1999-07-15 2001-01-25 Dobi Medical Systems, Llc Method of living organism multimodal functional mapping

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD89259B (en) *
US5360008A (en) * 1992-11-18 1994-11-01 Campbell Jr William G Respiratory and cardiac monitor
WO2001005304A1 (en) * 1999-07-15 2001-01-25 Dobi Medical Systems, Llc Method of living organism multimodal functional mapping

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2752158A1 (en) * 2011-08-30 2014-07-09 Universidad De Extremadura Unit, modular system and method for measuring, processing and remotely monitoring electrical bioimpedance
EP2752158A4 (en) * 2011-08-30 2015-04-08 Univ Extremadura Unit, modular system and method for measuring, processing and remotely monitoring electrical bioimpedance
US9107644B2 (en) 2013-07-05 2015-08-18 James Tyler Frix Continuous transdermal monitoring system and method
US9339236B2 (en) 2013-07-05 2016-05-17 James Tyler Frix Continuous transdermal monitoring system and method
US9339237B2 (en) 2013-07-05 2016-05-17 James Tyler Frix Continuous transdermal monitoring system and method
US9717448B2 (en) 2013-07-05 2017-08-01 James Tyler Frix Continuous transdermal monitoring system and method
US9717464B2 (en) 2013-07-05 2017-08-01 James Tyler Frix Continuous transdermal monitoring system and method
CN104757965A (en) * 2015-04-30 2015-07-08 张释文 DSP-based heart rate measurement device

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Effective date: 20121101