CA1113156A - Electro-magnetic therapeutic system - Google Patents
Electro-magnetic therapeutic systemInfo
- Publication number
- CA1113156A CA1113156A CA336,231A CA336231A CA1113156A CA 1113156 A CA1113156 A CA 1113156A CA 336231 A CA336231 A CA 336231A CA 1113156 A CA1113156 A CA 1113156A
- Authority
- CA
- Canada
- Prior art keywords
- magnetic field
- coil
- preselected
- treatment
- time
- 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.)
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N2/00—Magnetotherapy
- A61N2/02—Magnetotherapy using magnetic fields produced by coils, including single turn loops or electromagnets
Abstract
ABSTRACT OF THE DISCLOSURE
An electro-magnetic low frequency therapeutic system comprising a magnetization coil for creating an electro-magnetic field in response to a preselected treat-ment signal whereby the magnetic field has a desired treat-ment characteristic. The magnetic field has an adjustable intensity set by adjustable control means. The control means also is provided with circuit means for controlling the peak amplitude of the field for achieving a specific modulation of the peak amplitude in a given time. The control means further has means to select the orientation and/or direction with respect to a tissue to be treated.
Still further, the control means has circuit means to select the repetition frequency, either pulsating or sinusoidal, fed to the magnetization coil to obtain a selected one of dif-ferent therapeutic signals. Still further, the control means is provided with means to select a desired treatment time.
An automatic demagnetizing means is also provided and res-ponsive to a preselected demagnetizing time and mode for attenuating the field in a desired manner to terminate a magnetic field treatment.
An electro-magnetic low frequency therapeutic system comprising a magnetization coil for creating an electro-magnetic field in response to a preselected treat-ment signal whereby the magnetic field has a desired treat-ment characteristic. The magnetic field has an adjustable intensity set by adjustable control means. The control means also is provided with circuit means for controlling the peak amplitude of the field for achieving a specific modulation of the peak amplitude in a given time. The control means further has means to select the orientation and/or direction with respect to a tissue to be treated.
Still further, the control means has circuit means to select the repetition frequency, either pulsating or sinusoidal, fed to the magnetization coil to obtain a selected one of dif-ferent therapeutic signals. Still further, the control means is provided with means to select a desired treatment time.
An automatic demagnetizing means is also provided and res-ponsive to a preselected demagnetizing time and mode for attenuating the field in a desired manner to terminate a magnetic field treatment.
Description
The present invention relates to an electro-magnetic system and method for treating various types of rheumatic and arthritic disease.
Various types of treatments and devices are known to give treatment to rheumatic and arthritic diseases. This invention is concerned with such apparatus and, namely, an electro-magnetic apparatus having multiple uses for treating rheumatic and arthritic diseases by means of an electro-magnetic field having predetermined characteristics, depend-ing on the treatment desired.
A feature of the present invention is to provide an electro-magnetic treatment apparatus for the relief of different types of rheumatie and arthritic diseases.
Another feature of the present invention is to provide an electro-magnetic apparatus which may be used for accelerating bone regeneration and wound healing and also -~
for the treatment of muscle ailments.
Another feature of the present invention is to provide an electro-magnetic treatment apparatus wherein the electro-magnetic field has a predetermined characteristic.
According to the above features, from a broad aspect, the present invention provides an electro-magnetic low frequency therapeutic system comprising a magnetization coil.fo~hèrmagnetization coil is stationary during a magnetie field treatment for creating a preselected therapeutic magnetic field in response to preselected coil energizing-current waveforms whereby the magnetic field has desired treatment charaeteristics. The magnetic field has an adjustable intensity set by adjustable control means. The control means also has circuit means for eontrolling the peak amplitude of the magnetie field for aehieving a specific modulation of the peak amplitude in . .
- ~ . - ~ . -, a given time. Means is provided to select the orientation and/or direction of the therapeutic magnetic field with respect to a tissue to be treated. Circuit means is provided to select frequency of interruption of the coil energizing-current to obtain a selected one of different ~ -therapeu~c magnetic field time patterns. Means is also provided to select a desired treatment time. Automatic demagnetizing means is responsive to a preselected demagnetizing time and mode for attenuating the field in a desired manner to terminate a magnetic field treatment.
- la -'d~
15~;
A preferred embodiment of the present invention will now be described with reference to the accompanying drawings in which:
FIGURE 1 is a schematic illustration of the system FIGURES 2a and 2b illustrate the two embodiments of the treatment coil, FIGURE 3 is a plan view of the control unit showing the various controls thereon, FIGURE 4 is a perspective illustration of the possible configurations of the system for treating various diseases FIGURE 5 is a block diagram of the control unit including both sinus and pulse treatment fields, FIGURE 6 is a further block diagram of the system using a pulse treatment field only FIGURE 7 is a schematic illustration of the wave forms utilized in the sinusoidal treatment FIGURE 8 is a schematic illustration of the charac-teristic of the demagnetization curves:
FIGURE 9 is a schematic showing the various signalsof the pulse treatment, FIGURES lOa, lOb, lOc and lOd are illustrations of the pulse shaping and FIGURE 11 is a vector diagram showing the orienta-tion of the electro-magnetic field.
Referring now to the drawings, and more particularly to FIGURES 1, 2a, 2b and 4, there is shown the electro-magnetic therapeutic system of the present invention and comprising a magnetization coil 10 and a control unit 11 for establishing .
a predetermined electro-magnetic field characteristic in the magnetization coil lO. The electro-magnetic field may be the result of a sinus or a pulse magnetization signal fed by the control unit. As shown in Figure 2a, the magnetization coil lO may consist of a cylinder formed of a copper wire to create an air coil and it is used with the pulse magnetization field.
This type of coil is used for treatments such as shown in Figure 4 at (2) and (3) illustrations, and namely, for ortho-pedy or rheumatology treatments.
Figure 2b shows a different magnetization coil con-struction and, herein, a core coil. It consists of a copper wire which is coiled about a solid steel core. The wire can then be coated with a plastic or Fiberglass, Registered Trade-mark. The core coil may be used with the pulse or sinus electr~--magnetic field. The air coil may also be used with the sinus magnetic field when properly designed, that is to say, when the coil has approximately the same inductance L, Referring now to Figures 3, 5 and 6, there will be described the operation of the control unit ll. The apparatus is for medical use and for multiple treatments. The treatment is applied by a magnetization coil lO which generates an electro magnetic field. There are two types of coils, as previously described, and the predetermined characteristics of the magneti-field created by these coils is selected by the controls on the control unit 11 and as shown in Figure 3.
In a first option of the system, the electro-magnetic field is pulsed and in a second option, the electro-magnetic field is sinusoidal. As shown in Figure 3, the magnetic field has five characteristics which are adjustable by the controls on the panel 12 of the control unit 11. The first control 13 controls the amplitude or intensity of the electro-magnetic field from 0 to 100% as hereinshown in increments of 10%.
The control 14 controls the frequency of the fundamental of the electro-magnetic field in the order of 1, 2, 4, 8, 16 cycles of the periodic field in a given time depending on the selected frequency of treatment, with an interruption time respectively equal to 1, 2, 4, 8 and 16 cycles of the periodic field. The magnetization time is set by the control 15 and at the termination of the magnetization time, the second phase or the demagnetization phase of the treatment takes places.
This demagnetization phase has a time set by the control 16 for demagnetizing the coil 10. The demagnetization can be made in accordance with a linear or exponential characteristic as will later be described with reference to Figure 8.
The switch 17 sets the desired characteristic of the demagnetization time either for linear or exponential demagnetization. Switch 18 is a known switch for the system while switch 19 is the switch which starts the treatment and the various timers are synchronized with the switch 19. In dicator light 20 indicates the start and termination of the treatment. A jack 21 is provided to feed the magnetization field characteristic signal to Ule coil.
~ eferring now to Figure 5, the connection 107 con-nects to the switch 19 to start the treatment by operating an initiation circuit 115. The treatment will be effected as set by the controls on the unit 11. An audible circuit 108 is actuated during the period of treatment. The current monito circuit 109 operates the indicator lamp 20 on the console~
In the second phase of the treatment signal, during demagne-tization time, the amplitude is varied by means of an electro-.
' magnetic system 110 including a motor (not shown) coupled to a variable transformer. The interruption of the electro-magnetic field to produce pulse signals is effected by means of a power semi-conductor in the high voltage circuit 111.
The entire control unit is fed by a 60 cycle 115 volt or 50 cycle 230 volt supply at 112. It is the frequency of the voltage that determines the fundamental frequency of the mag-netic field. A 12 volt d.c. voltage is also provided to feed the various electronic and electro-magnetic circuits in the apparatus. The various controls 13, 14, 15 and 16 are rep-resented in Figure 5 at inputs 102, 103, 104 and 105. The mode switch 17 is represented at 106.
The high voltage circuit 111 feeds the current to the magnetization coil 10 and includes a variable auto-trans-former which permits to adjust the current to the desired value. A voltage transformer lowers the voltage in a manner whereby to obtain a current of high intensity in the coil 10.
A semi-conductor of the triac type permits the interruption of the current in accordance to the desired magnetic field.
This triac is controlled by a signal oP2.
` In the application of a pulse magnetic field, a capacitor is charged with the current in the secondary of the auto-transformer. The capacitor is then discharged in the coil 10 and produces a pulse current of high intensity. This is achieved by means of an SCR semi-conductor controlled by a - signal OP4. This signal corresponds to the signal OP3 which is delayed and which is similar to the signal OPl, with the exception that the pulses correspond to the negative cycle of the sinusoidal signal. A detector circuit is used to detect the nil tension furnished by the synchronization signal oPl .
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for sinusoidal application and OP3 for the pulse application. When the apparatus is used with a voltage of 230 volts at 50 cycles, an input auto-transformer will be used to reduce this voltage to 115 volts 50 cycles.
The d.c. voltage regulator circuit 113 utilizes a transformer which reduces the voltage as is necessary to supply the circuit. A regulator is also used to obtain a continuous voltage of 12 volts.
The current monitor circuit 109 includes a current transformer 114 which feeds the indicator lamp 20 which permit~
visual indication that the magnetization coil is in operation.
The initiation circuit 115 is operated by the start switch l9 and is placed in operation by the first pulse of the signal ~c which is similar to the signal OPl. The signal MU at one of the outputs of the circuit llS determines the speed of the motor. The signal Q commands the first phase of the treatment, that is, the mag time phase. The signal MR J~
appears at the end of the demag time and resets all the cir-cuits by means of the signal R.
The frequency circuit 116 produces an interruption of the magnetization current-at a predetermined frequency -(103). It generates a start pulse ZC. The signal oP2 is retarded relative to the signal oPl in such a manner to inter-rupt the passage to zero of the current in the treatment coil.
The delay circuit 117 generates the time period of the mag time of the treatment as predetermined by the setting on the control 15. At the end of the treatment, signal DL
commands the other circuits.
The audible tone circuit 108 produces two different 30 frequencies in accordance with the various sections of the .-- - - . , .,-. . . . . ,, , . ~ -treatment. It is operated by the signal Q. The change of the tone of the signal is controlled by the signal DL.
The amplitude circuit 118 generates a signal FD
of a predetermined frequency in accordance with the function of the demag time (105) and set by the control 16. This cir-cuit is controlled by the signal DL during the second phase or the demag time of the treatment. The circuit also gener-ates a time base TB. The time unit of this time base is variable in accordance with the setting of the demag switch 16.
The mode circuit 119 senerates the linear cl1r~7~ or a quasi-exponential curve of the amplitude of the magnetiza-tion current. This choice is established by the mode switch 17. The time base signal will modify the frequency signal FD
in such a way as to produce a second signal MD of which the ; frequency will control the speed of the motor in circuit 110.
This motor is a step-by-step motor and the direction of rota-tion of the motor is determined by the signal MU or MD. This motor is fed by a 12 volt supply and controlled by means of transistors. This motor will operate a variable auto-trans-former which in turn modifies the current in the magnetization coil whereby to demagnetize the coil in accordance with the preset mode characteristic.
Figure 6 includes the same component parts of the circuit described in Figure 5 with the exception that it is restricted to the pulse mode, whereas in Figure 5, there is shown both the pulse and the sinus modes.
Referring now to Figure 7, there is shown the detaile~
wave forms for the sinus electro-magnetic field treatment.
As shown, the basic wave form is a sinusoidal wave form which ~ a is either a 60 or 50 cycle signal dependlng on the frequency supply of the input voltage.
Figure 8 is an illustration of the characteristic of the demagnetization curves when the system is utilized in the linear or the quasi-exponential mode. The character-istic of the linear mode is shown at 90 and the quasi-expo-nential mode is shown at 91. The demag time tf = .5, 1, 1.5, etc. as shown on the control 16 of Figure 3.
Figure 9 shows the electromagnetization field in the pulse option.
An important original feature of the pulse shaping circuit (of the pulsatile generator) is that the electronic components of this circuit are shown so as to obtain a criti-cal or "nearly critical" damping of the current pulse flowing through the Treatment Unit. -Referring now to Figures lOa, b, c and d, there is shown the pulse shape of the signal in the pulse option with the connection of the elements L, RL and C as shown in Figure lOd and forming the pulse shaping circuit. This em-bodiment is the critical damping case where C -(4L2), tm =( ~ ) , and im = -(RL) CV
where C = the capacitance of charged capacitor(s) L = inductance of magnetization coil RL = DC resistance of wire of magnetization coil t = as defined in FIGURE 10 (approx. half of desired m pulse width) time corresponding to im im = as defined in FIGURE 10, maximum current VO = maximum voltage across C when charged e - base of the natural or neperian logarithm --(a~prox. 2.71828) , ~
f . . , , ,, '.
.
and it is intended that any of the components of this R, L, C circuit can be changed so as to cause the peak amplitude of the said current pulse to decrease by not more than 50%
of that resulting from the "Critical Damping Conditions" de-fined above, without departing from the spirit and scope of the present invention.
Figure 11 is a vector representation using the calculation of the magnetic field generated by a magnetic dipole effective mass +m and -m, separated by a distance 1.
The following equation applies for the coil as illustrated in Figure 2b~ It can be shown that i6
Various types of treatments and devices are known to give treatment to rheumatic and arthritic diseases. This invention is concerned with such apparatus and, namely, an electro-magnetic apparatus having multiple uses for treating rheumatic and arthritic diseases by means of an electro-magnetic field having predetermined characteristics, depend-ing on the treatment desired.
A feature of the present invention is to provide an electro-magnetic treatment apparatus for the relief of different types of rheumatie and arthritic diseases.
Another feature of the present invention is to provide an electro-magnetic apparatus which may be used for accelerating bone regeneration and wound healing and also -~
for the treatment of muscle ailments.
Another feature of the present invention is to provide an electro-magnetic treatment apparatus wherein the electro-magnetic field has a predetermined characteristic.
According to the above features, from a broad aspect, the present invention provides an electro-magnetic low frequency therapeutic system comprising a magnetization coil.fo~hèrmagnetization coil is stationary during a magnetie field treatment for creating a preselected therapeutic magnetic field in response to preselected coil energizing-current waveforms whereby the magnetic field has desired treatment charaeteristics. The magnetic field has an adjustable intensity set by adjustable control means. The control means also has circuit means for eontrolling the peak amplitude of the magnetie field for aehieving a specific modulation of the peak amplitude in . .
- ~ . - ~ . -, a given time. Means is provided to select the orientation and/or direction of the therapeutic magnetic field with respect to a tissue to be treated. Circuit means is provided to select frequency of interruption of the coil energizing-current to obtain a selected one of different ~ -therapeu~c magnetic field time patterns. Means is also provided to select a desired treatment time. Automatic demagnetizing means is responsive to a preselected demagnetizing time and mode for attenuating the field in a desired manner to terminate a magnetic field treatment.
- la -'d~
15~;
A preferred embodiment of the present invention will now be described with reference to the accompanying drawings in which:
FIGURE 1 is a schematic illustration of the system FIGURES 2a and 2b illustrate the two embodiments of the treatment coil, FIGURE 3 is a plan view of the control unit showing the various controls thereon, FIGURE 4 is a perspective illustration of the possible configurations of the system for treating various diseases FIGURE 5 is a block diagram of the control unit including both sinus and pulse treatment fields, FIGURE 6 is a further block diagram of the system using a pulse treatment field only FIGURE 7 is a schematic illustration of the wave forms utilized in the sinusoidal treatment FIGURE 8 is a schematic illustration of the charac-teristic of the demagnetization curves:
FIGURE 9 is a schematic showing the various signalsof the pulse treatment, FIGURES lOa, lOb, lOc and lOd are illustrations of the pulse shaping and FIGURE 11 is a vector diagram showing the orienta-tion of the electro-magnetic field.
Referring now to the drawings, and more particularly to FIGURES 1, 2a, 2b and 4, there is shown the electro-magnetic therapeutic system of the present invention and comprising a magnetization coil 10 and a control unit 11 for establishing .
a predetermined electro-magnetic field characteristic in the magnetization coil lO. The electro-magnetic field may be the result of a sinus or a pulse magnetization signal fed by the control unit. As shown in Figure 2a, the magnetization coil lO may consist of a cylinder formed of a copper wire to create an air coil and it is used with the pulse magnetization field.
This type of coil is used for treatments such as shown in Figure 4 at (2) and (3) illustrations, and namely, for ortho-pedy or rheumatology treatments.
Figure 2b shows a different magnetization coil con-struction and, herein, a core coil. It consists of a copper wire which is coiled about a solid steel core. The wire can then be coated with a plastic or Fiberglass, Registered Trade-mark. The core coil may be used with the pulse or sinus electr~--magnetic field. The air coil may also be used with the sinus magnetic field when properly designed, that is to say, when the coil has approximately the same inductance L, Referring now to Figures 3, 5 and 6, there will be described the operation of the control unit ll. The apparatus is for medical use and for multiple treatments. The treatment is applied by a magnetization coil lO which generates an electro magnetic field. There are two types of coils, as previously described, and the predetermined characteristics of the magneti-field created by these coils is selected by the controls on the control unit 11 and as shown in Figure 3.
In a first option of the system, the electro-magnetic field is pulsed and in a second option, the electro-magnetic field is sinusoidal. As shown in Figure 3, the magnetic field has five characteristics which are adjustable by the controls on the panel 12 of the control unit 11. The first control 13 controls the amplitude or intensity of the electro-magnetic field from 0 to 100% as hereinshown in increments of 10%.
The control 14 controls the frequency of the fundamental of the electro-magnetic field in the order of 1, 2, 4, 8, 16 cycles of the periodic field in a given time depending on the selected frequency of treatment, with an interruption time respectively equal to 1, 2, 4, 8 and 16 cycles of the periodic field. The magnetization time is set by the control 15 and at the termination of the magnetization time, the second phase or the demagnetization phase of the treatment takes places.
This demagnetization phase has a time set by the control 16 for demagnetizing the coil 10. The demagnetization can be made in accordance with a linear or exponential characteristic as will later be described with reference to Figure 8.
The switch 17 sets the desired characteristic of the demagnetization time either for linear or exponential demagnetization. Switch 18 is a known switch for the system while switch 19 is the switch which starts the treatment and the various timers are synchronized with the switch 19. In dicator light 20 indicates the start and termination of the treatment. A jack 21 is provided to feed the magnetization field characteristic signal to Ule coil.
~ eferring now to Figure 5, the connection 107 con-nects to the switch 19 to start the treatment by operating an initiation circuit 115. The treatment will be effected as set by the controls on the unit 11. An audible circuit 108 is actuated during the period of treatment. The current monito circuit 109 operates the indicator lamp 20 on the console~
In the second phase of the treatment signal, during demagne-tization time, the amplitude is varied by means of an electro-.
' magnetic system 110 including a motor (not shown) coupled to a variable transformer. The interruption of the electro-magnetic field to produce pulse signals is effected by means of a power semi-conductor in the high voltage circuit 111.
The entire control unit is fed by a 60 cycle 115 volt or 50 cycle 230 volt supply at 112. It is the frequency of the voltage that determines the fundamental frequency of the mag-netic field. A 12 volt d.c. voltage is also provided to feed the various electronic and electro-magnetic circuits in the apparatus. The various controls 13, 14, 15 and 16 are rep-resented in Figure 5 at inputs 102, 103, 104 and 105. The mode switch 17 is represented at 106.
The high voltage circuit 111 feeds the current to the magnetization coil 10 and includes a variable auto-trans-former which permits to adjust the current to the desired value. A voltage transformer lowers the voltage in a manner whereby to obtain a current of high intensity in the coil 10.
A semi-conductor of the triac type permits the interruption of the current in accordance to the desired magnetic field.
This triac is controlled by a signal oP2.
` In the application of a pulse magnetic field, a capacitor is charged with the current in the secondary of the auto-transformer. The capacitor is then discharged in the coil 10 and produces a pulse current of high intensity. This is achieved by means of an SCR semi-conductor controlled by a - signal OP4. This signal corresponds to the signal OP3 which is delayed and which is similar to the signal OPl, with the exception that the pulses correspond to the negative cycle of the sinusoidal signal. A detector circuit is used to detect the nil tension furnished by the synchronization signal oPl .
~L$~15~
for sinusoidal application and OP3 for the pulse application. When the apparatus is used with a voltage of 230 volts at 50 cycles, an input auto-transformer will be used to reduce this voltage to 115 volts 50 cycles.
The d.c. voltage regulator circuit 113 utilizes a transformer which reduces the voltage as is necessary to supply the circuit. A regulator is also used to obtain a continuous voltage of 12 volts.
The current monitor circuit 109 includes a current transformer 114 which feeds the indicator lamp 20 which permit~
visual indication that the magnetization coil is in operation.
The initiation circuit 115 is operated by the start switch l9 and is placed in operation by the first pulse of the signal ~c which is similar to the signal OPl. The signal MU at one of the outputs of the circuit llS determines the speed of the motor. The signal Q commands the first phase of the treatment, that is, the mag time phase. The signal MR J~
appears at the end of the demag time and resets all the cir-cuits by means of the signal R.
The frequency circuit 116 produces an interruption of the magnetization current-at a predetermined frequency -(103). It generates a start pulse ZC. The signal oP2 is retarded relative to the signal oPl in such a manner to inter-rupt the passage to zero of the current in the treatment coil.
The delay circuit 117 generates the time period of the mag time of the treatment as predetermined by the setting on the control 15. At the end of the treatment, signal DL
commands the other circuits.
The audible tone circuit 108 produces two different 30 frequencies in accordance with the various sections of the .-- - - . , .,-. . . . . ,, , . ~ -treatment. It is operated by the signal Q. The change of the tone of the signal is controlled by the signal DL.
The amplitude circuit 118 generates a signal FD
of a predetermined frequency in accordance with the function of the demag time (105) and set by the control 16. This cir-cuit is controlled by the signal DL during the second phase or the demag time of the treatment. The circuit also gener-ates a time base TB. The time unit of this time base is variable in accordance with the setting of the demag switch 16.
The mode circuit 119 senerates the linear cl1r~7~ or a quasi-exponential curve of the amplitude of the magnetiza-tion current. This choice is established by the mode switch 17. The time base signal will modify the frequency signal FD
in such a way as to produce a second signal MD of which the ; frequency will control the speed of the motor in circuit 110.
This motor is a step-by-step motor and the direction of rota-tion of the motor is determined by the signal MU or MD. This motor is fed by a 12 volt supply and controlled by means of transistors. This motor will operate a variable auto-trans-former which in turn modifies the current in the magnetization coil whereby to demagnetize the coil in accordance with the preset mode characteristic.
Figure 6 includes the same component parts of the circuit described in Figure 5 with the exception that it is restricted to the pulse mode, whereas in Figure 5, there is shown both the pulse and the sinus modes.
Referring now to Figure 7, there is shown the detaile~
wave forms for the sinus electro-magnetic field treatment.
As shown, the basic wave form is a sinusoidal wave form which ~ a is either a 60 or 50 cycle signal dependlng on the frequency supply of the input voltage.
Figure 8 is an illustration of the characteristic of the demagnetization curves when the system is utilized in the linear or the quasi-exponential mode. The character-istic of the linear mode is shown at 90 and the quasi-expo-nential mode is shown at 91. The demag time tf = .5, 1, 1.5, etc. as shown on the control 16 of Figure 3.
Figure 9 shows the electromagnetization field in the pulse option.
An important original feature of the pulse shaping circuit (of the pulsatile generator) is that the electronic components of this circuit are shown so as to obtain a criti-cal or "nearly critical" damping of the current pulse flowing through the Treatment Unit. -Referring now to Figures lOa, b, c and d, there is shown the pulse shape of the signal in the pulse option with the connection of the elements L, RL and C as shown in Figure lOd and forming the pulse shaping circuit. This em-bodiment is the critical damping case where C -(4L2), tm =( ~ ) , and im = -(RL) CV
where C = the capacitance of charged capacitor(s) L = inductance of magnetization coil RL = DC resistance of wire of magnetization coil t = as defined in FIGURE 10 (approx. half of desired m pulse width) time corresponding to im im = as defined in FIGURE 10, maximum current VO = maximum voltage across C when charged e - base of the natural or neperian logarithm --(a~prox. 2.71828) , ~
f . . , , ,, '.
.
and it is intended that any of the components of this R, L, C circuit can be changed so as to cause the peak amplitude of the said current pulse to decrease by not more than 50%
of that resulting from the "Critical Damping Conditions" de-fined above, without departing from the spirit and scope of the present invention.
Figure 11 is a vector representation using the calculation of the magnetic field generated by a magnetic dipole effective mass +m and -m, separated by a distance 1.
The following equation applies for the coil as illustrated in Figure 2b~ It can be shown that i6
2~
' ~ .. . .
' .11 ~ ~ .
W.. _ _. ,. - : .
' ~ .. . .
' .11 ~ ~ .
W.. _ _. ,. - : .
Claims (5)
1. An electro-magnetic low frequency therapeutic system comprising a magnetization coil, said magnetization coil being stationary during a magnetic field treatment, for creating a preselected therapeutic magnetic field in response to preselected coil energizing-current waveforms whereby said magnetic field has desired treatment charac-teristics, said magnetic field having an adjustable intensity set by adjustable control means, said control means also having:
(i) circuit means for controlling the peak amplitude of the said magnetic field for achieving a specific modulation of said peak amplitude in a given time;
(ii) means to select the orientation and/or direction of the therapeutic magnetic field with respect to a tissue to be treated;
(iii) circuit means to select the frequency of interruption of the coil energizing-current to obtain a selected one of different therapeutic magnetic field time patterns;
(iv) means to select a desired treatment time;
automatic demagnetizing means responsive to a preselected demagnetizing time and mode for attenuating said field in a desired manner to terminate a magnetic field treatment.
(i) circuit means for controlling the peak amplitude of the said magnetic field for achieving a specific modulation of said peak amplitude in a given time;
(ii) means to select the orientation and/or direction of the therapeutic magnetic field with respect to a tissue to be treated;
(iii) circuit means to select the frequency of interruption of the coil energizing-current to obtain a selected one of different therapeutic magnetic field time patterns;
(iv) means to select a desired treatment time;
automatic demagnetizing means responsive to a preselected demagnetizing time and mode for attenuating said field in a desired manner to terminate a magnetic field treatment.
2. A system as claimed in claim 1 wherein the said preselected coil energizing-current waveform is a sinu-soidal wave.
3. A system as claimed in claim 1 wherein the said coil energizing-current waveform is a periodically interrupted or on-off modulated sinusoidal wave.
4. A system as claimed in claim 1 wherein the said preselected coil energizing-current waveform is a series of pulses generated by a repeatedly discharged capacitor into said magnetization coil through a damping resistor.
5. A system as claimed in claim 4 wherein said capacitor is discharged at preselected time intervals to generate groups of pulses followed by time intervals during which the coil energizing-current is zero.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA336,231A CA1113156A (en) | 1979-09-24 | 1979-09-24 | Electro-magnetic therapeutic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA336,231A CA1113156A (en) | 1979-09-24 | 1979-09-24 | Electro-magnetic therapeutic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1113156A true CA1113156A (en) | 1981-11-24 |
Family
ID=4115196
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA336,231A Expired CA1113156A (en) | 1979-09-24 | 1979-09-24 | Electro-magnetic therapeutic system |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1113156A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2539999A1 (en) * | 1983-01-28 | 1984-08-03 | Ruggera Paul | HELICOIDAL WINDING FOR DIATHERMY APPARATUS AND METHOD FOR HEATING DIELECTRIC MATERIAL |
| US4690149A (en) * | 1985-10-28 | 1987-09-01 | The Johns Hopkins University | Non-invasive electromagnetic technique for monitoring physiological changes in the brain |
| EP0377284A2 (en) * | 1988-12-01 | 1990-07-11 | LIFE RESONANCES, INC. (a Montana corporation) | Improved method and apparatus for regulating transmembrane ion movement |
| US5045050A (en) * | 1989-11-15 | 1991-09-03 | Life Resonances | Method and apparatus for the treatment of cancer |
| US5052997A (en) * | 1987-04-10 | 1991-10-01 | The United States Of America As Represented By The Secretary Of The Department Of Health And Human Services | Diathermy coil |
| US5061234A (en) * | 1989-09-25 | 1991-10-29 | Corteks, Inc. | Magnetic neural stimulator for neurophysiology |
| US5195940A (en) * | 1991-06-20 | 1993-03-23 | Iatromed, Inc. | Method for increased production of growth factor in living tissue using an applied fluctuating magnetic field |
| US5211622A (en) * | 1989-11-15 | 1993-05-18 | Life Resonances, Inc. | Method and apparatus for the treatment of cancer |
| FR2694503A1 (en) * | 1992-08-05 | 1994-02-11 | Havas Jean Claude | Portable equipment for treating rheumatism and similar complaints - using inductive circuit, positive feedback to transistor polarised by direct current and microprocessor controlled trimming capacitance |
| US5338286A (en) * | 1992-12-08 | 1994-08-16 | Electro-Biology, Inc. | Electromagnetic bioresponse by selective spectral suppression in pulsed field stimulation |
| US5437600A (en) * | 1989-11-15 | 1995-08-01 | Life Resonances, Inc. | Method and apparatus for the treatment of cancer |
| EP0857494A2 (en) * | 1990-05-04 | 1998-08-12 | Bio-Magnetic Therapy Systems, Inc. | Apparatus for treating a body organ with magnetic field therapy |
-
1979
- 1979-09-24 CA CA336,231A patent/CA1113156A/en not_active Expired
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4527550A (en) * | 1983-01-28 | 1985-07-09 | The United States Of America As Represented By The Department Of Health And Human Services | Helical coil for diathermy apparatus |
| FR2539999A1 (en) * | 1983-01-28 | 1984-08-03 | Ruggera Paul | HELICOIDAL WINDING FOR DIATHERMY APPARATUS AND METHOD FOR HEATING DIELECTRIC MATERIAL |
| US4690149A (en) * | 1985-10-28 | 1987-09-01 | The Johns Hopkins University | Non-invasive electromagnetic technique for monitoring physiological changes in the brain |
| US5052997A (en) * | 1987-04-10 | 1991-10-01 | The United States Of America As Represented By The Secretary Of The Department Of Health And Human Services | Diathermy coil |
| EP0377284A2 (en) * | 1988-12-01 | 1990-07-11 | LIFE RESONANCES, INC. (a Montana corporation) | Improved method and apparatus for regulating transmembrane ion movement |
| EP0377284A3 (en) * | 1988-12-01 | 1990-11-22 | LIFE RESONANCES, INC. (a Montana corporation) | Improved method and apparatus for regulating transmembrane ion movement |
| US5061234A (en) * | 1989-09-25 | 1991-10-29 | Corteks, Inc. | Magnetic neural stimulator for neurophysiology |
| US5437600A (en) * | 1989-11-15 | 1995-08-01 | Life Resonances, Inc. | Method and apparatus for the treatment of cancer |
| US5045050A (en) * | 1989-11-15 | 1991-09-03 | Life Resonances | Method and apparatus for the treatment of cancer |
| US5211622A (en) * | 1989-11-15 | 1993-05-18 | Life Resonances, Inc. | Method and apparatus for the treatment of cancer |
| EP0857494A3 (en) * | 1990-05-04 | 1999-04-21 | Bio-Magnetic Therapy Systems, Inc. | Apparatus for treating a body organ with magnetic field therapy |
| EP0857494A2 (en) * | 1990-05-04 | 1998-08-12 | Bio-Magnetic Therapy Systems, Inc. | Apparatus for treating a body organ with magnetic field therapy |
| US5195940A (en) * | 1991-06-20 | 1993-03-23 | Iatromed, Inc. | Method for increased production of growth factor in living tissue using an applied fluctuating magnetic field |
| US5330410A (en) * | 1991-06-20 | 1994-07-19 | Iatromed, Inc. | Method for increased production of growth factor in living tissue using an applied fluctuating magnetic field |
| FR2694503A1 (en) * | 1992-08-05 | 1994-02-11 | Havas Jean Claude | Portable equipment for treating rheumatism and similar complaints - using inductive circuit, positive feedback to transistor polarised by direct current and microprocessor controlled trimming capacitance |
| US5338286A (en) * | 1992-12-08 | 1994-08-16 | Electro-Biology, Inc. | Electromagnetic bioresponse by selective spectral suppression in pulsed field stimulation |
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