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EP1377343A1 - Appareil portable pour le soulagement de la douleur - Google Patents

Appareil portable pour le soulagement de la douleur

Info

Publication number
EP1377343A1
EP1377343A1 EP02708114A EP02708114A EP1377343A1 EP 1377343 A1 EP1377343 A1 EP 1377343A1 EP 02708114 A EP02708114 A EP 02708114A EP 02708114 A EP02708114 A EP 02708114A EP 1377343 A1 EP1377343 A1 EP 1377343A1
Authority
EP
European Patent Office
Prior art keywords
handheld device
membrane
therapy
electrodes
hand
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Withdrawn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
EP02708114A
Other languages
German (de)
English (en)
Inventor
Kurt Schleuniger
Hans-Jörg ZWEIFEL
Ronald Dehmlow
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.)
Sobet AG
Original Assignee
Sobet AG
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 Sobet AG filed Critical Sobet AG
Publication of EP1377343A1 publication Critical patent/EP1377343A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F7/00—Heating or cooling appliances for medical or therapeutic treatment of the human body
    • A61F7/02—Compresses or poultices for effecting heating or cooling
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/54—Control of the diagnostic device
    • A61B8/546—Control of the diagnostic device involving monitoring or regulation of device temperature
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00—Electrotherapy; Circuits therefor
    • A61N1/18—Applying electric currents by contact electrodes
    • A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00—Electrotherapy; Circuits therefor
    • A61N1/18—Applying electric currents by contact electrodes
    • A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
    • A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
    • A61N1/36014—External stimulators, e.g. with patch electrodes
    • A61N1/36021—External stimulators, e.g. with patch electrodes for treatment of pain
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N2/00—Magnetotherapy
    • A61N2/002—Magnetotherapy in combination with another treatment
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N7/00—Ultrasound therapy
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B2017/00681—Aspects not otherwise provided for
    • A61B2017/00734—Aspects not otherwise provided for battery operated
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F7/00—Heating or cooling appliances for medical or therapeutic treatment of the human body
    • A61F2007/0001—Body part
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F7/00—Heating or cooling appliances for medical or therapeutic treatment of the human body
    • A61F7/007—Heating or cooling appliances for medical or therapeutic treatment of the human body characterised by electric heating
    • A61F2007/0075—Heating or cooling appliances for medical or therapeutic treatment of the human body characterised by electric heating using a Peltier element, e.g. near the spot to be heated or cooled

Definitions

  • Handheld devices especially those with ultrasound and for electrotherapy, are often only suitable for therapeutic applications by a doctor or trained therapy personnel. Accordingly, they are relatively expensive and equipped with numerous features that cause damage in the hand of a layperson when used improperly. Due to the complexity of their possible uses, these devices generally consist of an application part and a control part connected to it via a cable, which is designed as a table-top device or even as a cabinet.
  • the aim of the present invention is to provide a hand-held device according to the preamble of claim 1 for pain reduction, which can also be operated independently of the power supply and in which the electronics are housed in a housing similar to a cell phone or shower head.
  • Handheld devices with battery operation are known for therapy devices with electromagnetic fields or stimulation current. The power requirement of ultrasound devices has so far ruled out the construction of off-grid handheld devices.
  • the field of application of the device according to the invention is in the area of wellness, fitness, cosmetics, pain reduction or anti-stress treatment in humans or for the treatment of animals.
  • the solution to the problem is obtained by using several therapeutically effective signals individually or in combination can be, for example, ultrasound, electric field, magnetic field, electromagnetic field, heat or cold and stimulation current.
  • the individual signal strengths can be varied and set manually. All therapy signals are emitted by a single multifunctional radiation head 1.
  • the same radiation head 1 may also contain a sensor which detects the body's reaction to the irradiated therapy signals or a sensor or. a detection device which determines whether the device emits the therapy signals into the air or into a body to be treated.
  • Another problem to be solved is to reduce the energy consumption to such an extent that the device can be operated for several therapeutic sessions independently of an external energy source. This limits the selection of the therapeutically effective signals that are possible for therapy and requires an optimal conversion of the available energy into therapeutic fields. For ultrasound in particular, it has not previously been possible to operate therapy devices independently of the network.
  • the batteries are charged in a charging station, e.g. through inductive energy transmission.
  • a charging station e.g. through inductive energy transmission.
  • the same charging station can also be used to control the handheld device and as an interface to a PC. Show it:
  • FIG. 1 is a schematic view of a handheld device
  • Fig. 2 Overall view of the handheld device according to one
  • Fig. 4 detailed sectional view through the radiation head 1 with an external Peltier element 25,
  • Fig. 6 Section through the radiation head 1 with Liquid cooling
  • Fig. 8 Detailed view of the radiation head 1 Fig. 9, radiation head 1 with integrated sensor.
  • FIG. 1 shows a schematic view of an exchangeable radiation head 1 of a hand-held device for radiation of ultrasound therapy signals.
  • a vibrating element 3 sends ultrasonic signals through a membrane 2 of a radiation head.
  • a contact spring 6 is sufficient for the electrical control of the oscillating element, which controls the oscillating element via a contact plate 5 and a lower connecting wire (not shown).
  • the circuit is closed via the electrically conductive wall of the radiation head.
  • the radiation head can be screwed onto a handle.
  • the axis of the radiation head can form an angle different from 90 ° to the axis 16 of the handle 15 of the handle part.
  • the angle can be smaller or larger than 90 °.
  • space for the batteries or accumulators 10 is provided in the grip part of the hand-held device. If required, however, the device can also be connected to a larger external battery pack, which can be worn on a belt or shoulder strap. External power supplies are also provided for stationary applications. With an external power supply unit, the energy can be transferred inductively, so that no live parts can pose a danger to the user, even in applications in the bathtub or water bath.
  • the induction coils 11 are located in the handle end of the device. This can avoid any sealing problems become.
  • the grip part need not be straight and conical, it can also have a curved shape. It only has to offer enough space for an accumulator 10, the control electronics, etc. and must fit into the hand of the user, which of course also means e.g. computer mouse-shaped handheld device is possible.
  • the control electronics 14 are located in the handle part of the treatment device. This includes in particular the on / off switch 12 for ultrasound, stimulation current and heat, respectively. Cold, electric, magnetic and / or electromagnetic field.
  • the control electronics 14 can be constructed as an integrated circuit or as a microprocessor.
  • a memory for the recording of therapy parameters allows, for example, a sports trainer to store the treatment parameters for various test subjects and to evaluate them systematically.
  • the existing therapy signals can only be switched on or off.
  • all therapy signals can be used in different energy levels.
  • a plurality of light-emitting diodes 13 are installed as signal displays in the handle 15. One of the light emitting diodes 13 shows the radiated form of energy. The duration of treatment can also be preset.
  • the integrated timer only runs when the integrated sensors detect contact with the body to be treated.
  • the built-in LED 13 of the timer indicates that the timer has stopped and the LED of the blocked signal flashes.
  • an acoustic warning signal is also given.
  • all control elements are housed in a charging station.
  • the handheld device has at most one on / off switch 12.
  • the selection of the different therapy signal combinations takes place at the charging station, which e.g. controls the microprocessor in the handheld device optically or electrically.
  • the charging mode the rechargeable batteries 10 accommodated in the hand-held device are charged by inductive coupling.
  • FIG. 7a, 7b, 7c show examples of different forms of electrode arrangements for stimulation current therapy and therapy with electric fields.
  • the depth of penetration of the therapy signals into the body depends both on the electrode arrangement (sectors 29, circular rings 30, circular electrodes 31, with an external second electrode, etc.) and on the control, i.e. on the selected polarities for the individual partial electrodes.
  • Figure. 8 shows a schematic detailed view of a possible assembly of a piezo crystal as a vibrating element 3.
  • the material thicknesses are not shown to scale.
  • Fig. 9 also shows a schematic cross section through a Beam head 3 with integrated sensor.
  • This head differs from the other heads according to FIGS. 1-6 in that the electrodes 7a and 7b for the therapy with electric fields are located within the radiation head. The same electrodes can also be used as sensor electrodes.
  • This radiation head is also characterized in that a coil is provided for generating the magnetic field, the arrangement being such that as few discrete components as possible have to be assembled so that the head can perform all the desired functions.
  • a piezoceramic is advantageously used as the active piezoelectric oscillating element 3.
  • Piezoceramic has the advantage over foils that it has better resonance vibrations, so that the optimization of the entire radiation head 1 is easier.
  • the basic frequency of the ceramic is typically between 0.8 and 4 MHz.
  • oscillating elements 3 with frequencies between 0.5 MHz and 10 MHz can also be used.
  • the known devices with higher frequencies up to 100 MHz mostly do not serve therapeutic, but diagnostic purposes.
  • the vibrating element 3 is mounted on the membrane 2 of the radiation head 1 with a conductive adhesive.
  • the adhesive can perform four functions:
  • one or more elevations 20 on the membrane 2 guarantee that the thickness of the casting compound 4 corresponds to the desired value everywhere. Due to the chemical composition, adapted thickness and admixtures, the casting compound 4 forms a lambda / 4 layer, which ensures the impedance matching of the oscillating element 3 to the membrane 2 of the radiation head 1 and to the skin of the user.
  • an admixture e.g. a powder of metal dust, ceramic or glass can be used.
  • the conductive adhesive 22, the sealing compound 4 and the damping medium 19 can be made of the same material which, depending on the location in the radiation head 1, fulfills other functions.
  • a relatively thick plate e.g. 1 mm thick, can be used as membrane 2. It is only important that the ultrasound can penetrate the membrane 2 without significant damping.
  • the outer side of the membrane 2 can also be designed as a spherical cap, so that contact with the surface of the body to be treated is always guaranteed in a part of the membrane 2.
  • the side of the membrane 2 facing the body of the user can also be covered with a lambda / 4 layer 21, so that the transmission of the ultrasonic energy from the membrane 2 to a body is optimized.
  • the upper electrode of the vibrating element 3 is contacted with a conductive adhesive 22 or with a spring 6.
  • the back of the vibrating element 3 is embedded in a casting compound 4 made of plastic, epoxy or araldite. This protects the ceramic against mechanical shock and the ultrasonic waves emitted backwards are damped.
  • the sides of a circular piezoceramic are not inclined, but are inclined in two facets (cf. FIG. 8).
  • the largest circumference is just halfway up.
  • the ceramic is also mounted laterally in the casting compound 4 to dampen the undesired longitudinal vibrations.
  • the vibrating element 3 can be constructed and assembled in such a way that it encompasses the widest possible vibration spectrum without sharp resonances, so that the signal frequencies emitted e.g. can be adjusted by the microcontroller without changing the mechanical structure.
  • a Peltier element 25 As the heating and cooling element.
  • a cooling medium is pumped through cooling ducts 26 using a micropump.
  • the surface of the radiation head 1 or the handle 15 can be used as a cooling surface, for example.
  • the maximum heating temperature is 40 ° C, the lowest temperature of membrane 2 is 5 ° C. If cooling is dispensed with, a resistor or a semiconductor can be used as the heating element.
  • the entire handheld device should be watertight. This ensures that massages in the bathtub can also be permitted.
  • the fixed accumulator 10 is charged inductively from a charging station. In network operation, too, only an inductive coupling via the induction coils 11 is created. When operating with an external battery pack, the DC voltage must first be transformed before it can be transferred to the handheld device.
  • the ultrasound output is advantageously modulated.
  • the modulation can be sawtooth, rectangular or sinusoidal.
  • a single pulse packet can include only a single ultrasound pulse or a plurality of pulses.
  • the burst durations range from 300 nanoseconds (at 3 MHz ultrasound) to 1 s.
  • a packet is typically followed by a break of the same duration, ie the duty cycle is usually 50% or more.
  • this enables a longer period of use in off-grid operation, and on the other hand prevents the risk of tissue damage if used improperly.
  • a range from 10% to 75% or a continuous adjustability from 0% to 100% are also conceivable.
  • the maximum emitted ultrasound intensity can be limited to 80 mW / cm 2 .
  • the minimum emitted ultrasound intensity is 0.05 mW / cm 2 . If the membrane 2 is lifted off the body during the treatment, the ultrasound waves generated are largely reflected at the membrane 2-air boundary. This can be detected by the control electronics 14.
  • An acoustic warning signal sounds after 10 s and after another 10 s the treatment device is switched off automatically. This feature can be deactivated or not available for devices that are designed for use without the use of a gel.
  • the intensity i.e. The voltage or the current in stimulation current therapy can only be done individually: A voltage that one user with dry skin describes as barely noticeable is already described as unpleasant by another user with moist skin. It is therefore common in stimulation current therapy to neither specify the voltage used nor the current precisely. Rather, it is left to the user to select the area that suits him.
  • the control electronics for stimulation current therapy only ensure that when the body is stopped and contacted again, no unpleasant voltages or currents that even pose a health risk are generated.
  • the current intensities delivered for the stimulation current therapy are preferably in the range 0.1, 1 or 10 mA.
  • the electromagnetic radiation generated by the excitation of the piezoelectric oscillating element 3 can only be partially shielded.
  • the housing of the radiation head 1 is shielded, with the exception of the membrane-side end.
  • This membrane side can partially consist of non-shielding material, so that the electromagnetic radiation can emerge unhindered in some areas, or the shielding can be less efficient, so that large-area attenuated radiation emerges.
  • the flux density of the magnetic field is preferably on the order of 1, 10 or 100 ⁇ T. An order of magnitude of 0.5, 1, 2 or 4 V / m is proposed for the electric field strength.
  • an antenna, a coil 33, a capacitor plate, a film or two circular cylinder electrodes 7a, 7b can be integrated in the head part, so that, depending on the embodiment, the electrical, magnetic or electromagnetic fields can be emitted individually or in combination.
  • sensors can be integrated in the head part, which determine the reaction of the treated body to the irradiated therapy signals.
  • Two cylindrical electrodes 7a, 7b, which surround the other components of the radiation head 1, are proposed as a possible simple embodiment.
  • the same two electrodes 7a, 7b can also be used for the Generation of the electric field can be used.
  • the diameter of the ultrasound radiating membrane 2 is 5 or 10 mm in the small form and 30 mm in the large form.
  • the small embodiment is recommended e.g. for the treatment of joints, sprained fingers or toes, the large version for the treatment of larger, flat parts of the body.
  • a single ceramic is used as the vibrating element 3 for the ultrasound excitation.
  • several concentrically arranged ring ceramics or an arrangement of several circular electrodes 31 can be used.
  • the angle ⁇ between the axis of the transducer and the axis of the handle 15 can be 90 ° or less or more than 90 °, depending on the preferred use of the device: for the treatment of one's own back or for the body of another person, the angle is not the same ideal.
  • the angle is adjustable in the medical version. If the transducer is spherical, the contact of the spherical cap-shaped membrane 2 is automatically ensured within a certain angular range.
  • a spring strut pin, a spiral contact spring 6 or a simple contact wire 23 can be used for contacting the oscillating element 3.
  • the contact wire 23 is divided into two, for example in an upper and a lower connecting wire 17, respectively. 18.
  • the contact on the vibrating element 3 can be made with simple mechanical contact, with a conductive adhesive 22 or by soldering.
  • the conductive adhesive 22 combines the advantage of safe contact and temperature resistance. When soldering, either a deep-melting solder with low temperature resistance must be used, or a local depolarization of the piezo oscillating element 3 must be accepted.
  • All therapy fields emitted by the handheld device apart from the thermal signal can depend directly on the oscillation frequency of the piezo element or can be reduced by a frequency divider. Furthermore, they cannot be modulated at all, or at 1, 30, 50 or 100 Hz.
  • the charging station serves to recharge the batteries 10 of the handheld device. However, it can also take on other tasks. In particular, it can be designed such that the therapy signal parameters can be set at the charging station and can be transmitted optically or electromagnetically to the handheld device. On the other hand, signals from a sensor integrated in the handheld device can be read from the charging station and, if necessary, evaluated or transmitted to a PC. The charging station then functions as a control unit or as an interface. 1. Beam head

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Public Health (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Veterinary Medicine (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Radiology & Medical Imaging (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Physics & Mathematics (AREA)
  • Biophysics (AREA)
  • Vascular Medicine (AREA)
  • Thermal Sciences (AREA)
  • Pathology (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Pain & Pain Management (AREA)
  • Percussion Or Vibration Massage (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)

Abstract

L'invention concerne un appareil thérapeutique à ultrasons, capable de fonctionner indépendamment d'une source extérieure de courant, Pour une plus longue utilisation, par exemple, pour un sujet à l'entraînement sur un terrain de sport, l'appareil peut fonctionner au moyen d'une batterie externe et, dans un emplacement fixe, le courant est fourni par le réseau. Pour des raisons de sécurité, l'intensité des ultrasons émis est réduite par rapport aux appareils thérapeutiques médicaux. Le même appareil peut être utilisé pour chauffer ou refroidir la zone à traiter. L'appareil peut en outre être agencé pour la production de champs électriques, magnétiques et électromagnétiques et en électrophysiothérapie, avec, ou sans une seconde électrode séparée. A cet effet, la tête d'émission du rayonnement (1) renferme un élément oscillant (3), des éléments Peltier (25) pour le chauffage et le refroidissement, ainsi que des électrodes (28, 29, 30) pour l'électrophysiothérapie.
EP02708114A 2001-03-29 2002-04-02 Appareil portable pour le soulagement de la douleur Withdrawn EP1377343A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH5872001 2001-03-29
CH587012001 2001-03-29
PCT/CH2002/000183 WO2002094375A1 (fr) 2001-03-29 2002-04-02 Appareil portable pour le soulagement de la douleur

Publications (1)

Publication Number Publication Date
EP1377343A1 true EP1377343A1 (fr) 2004-01-07

Family

ID=4521877

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02708114A Withdrawn EP1377343A1 (fr) 2001-03-29 2002-04-02 Appareil portable pour le soulagement de la douleur

Country Status (4)

Country Link
US (1) US20040171970A1 (fr)
EP (1) EP1377343A1 (fr)
AT (1) AT6199U3 (fr)
WO (1) WO2002094375A1 (fr)

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AT6199U2 (de) 2003-06-25
US20040171970A1 (en) 2004-09-02
WO2002094375A1 (fr) 2002-11-28
AT6199U3 (de) 2005-08-25

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