Surgery – Magnetic field applied to body for therapy
Patent
1996-05-06
1998-03-31
Lacyk, John P.
Surgery
Magnetic field applied to body for therapy
600 26, A61N 200
Patent
active
057332401
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a device for administering sound waves and/or a magnetic field to a patient.
Diverse such devices have already been described. These combine only a permanent magnetic field with ultrasonics.
SUMMARY OF THE INVENTION
It has now been found however that with low-frequency sound waves better results are obtained in treating poor blood circulation and/or in relieving pain. It is known that magnetic fields have a beneficial effect on bones, joints and muscles. The present invention provides a device with produces the positive results of administering the sound waves, optionally in combination with the therapeutic effect of a magnetic field. This is achieved by a device including a housing in which is accommodated a source for generating low-frequency sound waves, at least one source for generating a magnetic field and means for adjusting the frequency of the sound waves.
The source for generating the sound waves is preferably formed by a speaker. The dimensions of the speaker, in addition to the frequency generated thereby, can be varied depending on the situation. In preference sound waves of a frequency between 10 and 180 Hertz are applied. The most used frequency varies however between 145 and 155 Hertz. The sound wave is preferably a sinus wave which is generated via a memory element.
In a preferred embodiment of the invention the frequency of the wave varies within a range of a number of Hertz above and below the central frequency. The frequency preferably fluctuates between 5 Hertz above the central frequency and 5 Hertz below the central frequency. This is particularly advantageous because it has been found that use of a fixed, non-varying frequency results in habituation of a patient. Variation in the frequency can prevent this habituation.
The frequency of the magnetic field preferably lies between 1 and 25 Hertz at a field strength of 1 to 15 mT in the middle of the coil. The associated coil preferably has 200 turns of 1 mm.sup.2.
Optimum operation of the device is achieved when both the sound waves and the magnetic field are administered no the body in a controlled manner. This can be achieved by propagating the sound waves and the magnetic field through a small aperture in the housing of the device. No sound waves and/or magnetic field is hereby lost.
The device according to the invention can take diverse forms of appearance. It is first of all possible to accommodate the sound source in a tubular housing which is easy to handle and can be placed on any desired location of the body for treating. In such a device the coil is arranged at the outlet for the sound waves. Preferably situated over the coil is a rubber ring for concentrating both the magnetic field and the sound waves. The housing is preferably embodied in 3 mm-thick aluminium. This is important with respect to the sturdiness of the housing, since the housing itself may not vibrate along with the sound waves.
In another embodiment the device includes a box in which the speaker is arranged. This box is again provided with a reduced-size aperture for passage of the sound waves and/or the magnetic field. In a particular embodiment of the invention two apertures are arranged for passage of the sound waves and/or the magnetic field which preferably have the form of a human foot. The applying of the sound waves and/or the magnetic field to the feet of the patient has the advantage that in this manner the whole body can be reached by means of the sound waves.
The device according to the invention can likewise be used under water. The patient is in this case placed for instance in a bath while sound waves and/or a magnetic field are likewise administered to him under water using the device. Administering can take place on the feet but also on any other desired location on the body.
BRIEF DESCRIPTION OF THE DRAWINGS
The present invention will be further elucidated with reference to the annexed drawings, in which:
FIG. 1 shows a partly broken away perspective view of a tubular device accordi
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