RU2479289C2 - Device for reverse thermal exposure on human body area - Google Patents

Abstract

FIELD: medicine.

SUBSTANCE: invention refers to medical equipment and aims at producing apparatuses implementing an optimum program of reverse thermal exposure on a human body area. The device comprises a control element in the form of series or parallel connected groups with series or parallel connected thermocouples, temperature sensors arranged on the thermally exposing surface of the control element, a direct current source, a first switch with its input connected to a DC source and with its output connected to the groups of thermocouples, a program control unit, a control unit of thermal power of the thermocouples contacts of which are in a supply circuit of the thermocouples, a two-temperature selector, a comparison unit, a second switch a control input of which is connected to an output of a program control unit. Outputs of the two-temperature selector are connected to input of the second switch an output of which and an output of the temperature sensors are connected to inputs of the comparison unit connected to a control input of a control unit.

EFFECT: use of the invention provides the higher performance of the device.

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Description

The invention relates to medical equipment and can be used to create apparatuses that implement the optimal program of reversible thermal effects on a part of the human body and have an extensive range of practical applications: to relieve monotony in vehicle drivers, air traffic controllers, conveyor-type operators, relieve stress and neurotic conditions, treatment of a wide range of diseases, including diseases of the peripheral nervous system, cancer, for cosmetic purposes, and others.

The closest in technical essence and the achieved result to the proposed device is a therapeutic device containing an actuator in the form of groups of semiconductor thermoelements connected in series or parallel to each other, temperature sensors located on the heat-acting surface of the actuator, a constant current source, voltage polarity reversing unit, inputs connected to outputs of a direct current source, outputs connected to thermoelectric groups cops, program control unit, whose output is connected to the control input of the reversing unit, the regulation of the heat capacity of thermal elements, contacts of which are included in the power supply circuit group of thermocouples (see. US Patent No. 2002026226 A1, 28.02.2002).

A disadvantage of the known device adopted for the prototype is the low therapeutic and prophylactic efficiency of the device when implementing the regime of local reversible thermal effects on a portion of the human body.

This disadvantage is due to the fact that in the known device during the periodic process of local reversible thermal influences, there is no preliminary task and subsequent achievement of the values of time factors regulated by medical requirements, which determine with the necessary accuracy the integral value of the thermal energy of each direction absorbed by the tissues of the body area during therapeutic procedure, such as the duration of maintaining the maximum and minimum amplitude values eny temperatures in the heat exposure modes in different directions, the number of cycles of reversing the effects of heat, the total duration of the procedure.

The technical result of the invention is to increase the therapeutic and prophylactic efficiency of the device when implementing the regime of local reverse thermal influences on a part of the human body, achieved by preliminary assignment and subsequent achievement of the values of time factors regulated by medical requirements, which determine with the necessary accuracy the integral value of thermal energy of each direction, body tissue absorbed by tissues during a therapeutic procedure, t FIR as the duration of maintaining the maximum and minimum amplitude values in modes temperature thermal exposure of different directions, the number of cycles of reversing the effects of heat, the total duration of the procedure.

The specified technical result is achieved due to the fact that the device for performing reverse thermal effects on a part of the human body contains an actuating element in the form of series-connected or parallel-connected groups with series-connected or parallel-connected thermocouples, temperature sensors located on the heat-acting surface of the actuating element, a constant source current, the first switch input connected to the output of the DC source, the output connected to groups of thermocouples, a program control unit, the output of which is connected to the control input of the first switch, a thermal power control unit of thermocouples, the contacts of which are included in the power circuit of the thermocouple group, a two-level temperature controller, a comparison unit, a second switch, a control input of the second the switch is connected to the output of the program control unit, the outputs of the two-level temperature setter are connected to the inputs of the second switch, the WTO output The switch and the outputs of the temperature sensors are connected to the inputs of the comparison unit, and the output of the comparison unit is connected to the control input of the control unit.

The invention is illustrated graphic material.

Figure 1 presents the electrical diagram of the proposed device.

The proposed device includes a direct current source 1, the outputs of which are connected to the inputs of the first switch 2, connected in series or parallel to each other of group 3 with series or parallel connected thermocouples (not shown in Fig.), Which realize the Peltier effect, connected to the outputs the first switch 2, the second switch 4, with the inputs of which the outputs of the two-level temperature setter 5 are connected, the program control unit 6, the outputs of which are connected in parallel with the control the input inputs of the first switch 2 and the second switch 4, the comparison unit 7, with the inputs of which are connected the output of the second switch 4 and the outputs of the temperature sensors 8 connected to the heat-acting surface of the actuating element, the thermal power control unit 9 of the thermocouples, the control input of which is connected to the output of the comparison unit 7, and the contacts are included in the power supply circuit of groups of 3 thermocouples.

The proposed device operates as follows.

First, by means of a two-level temperature adjuster 5, the first and second levels of control signals are set corresponding to the amplitude values of temperatures t _stmin and t _st.max , which are planned to be provided on the heat-acting surfaces of groups of 3 thermoelements when the device implements reverse thermal influences. For example, in a device designed for carrying out cosmetic procedures in the form of thermal _{massage, the} value of t _st.min can be set in the range (5 ÷ 15) ° С, and the value of t _st.max - in the range (35 ÷ 50) ° С. In a device designed to treat neoplasms on a skin site, cascading may be used; the value of t _ct.min can be set in the range of minus (30 ÷ 80) ° C, and t _ct.max - in the range of (45-50) ° C.

Moreover, the amplitude values of temperatures t _ct.min and t _ct.max should be determined on the basis of medical recommendations governing the implementation of each type of thermocyclic procedures.

Preliminarily, by means of the program control unit 6, the durations τ ₁ and τ _{2 of} maintaining the amplitude values of temperatures t _ct.min and t _{ct.max are set} in the modes of heat exposure in different directions, the number of cycles of reversing the heat effects for each group of 3 thermoelements, the total duration of the procedure. The values of all of the above parameters should also follow from medical recommendations for each type of thermocyclic procedures.

Set the actuator element of the device on the site of the body.

Connect the device to the power supply.

Depending on the polarity of connecting groups of 3 thermocouples to the power source of 1 group of 3 thermocouples, they can either work in the same thermal conditions, realizing an isothermal process on the entire working surface of the actuating element, or work in opposite thermal conditions, realizing a given spatial distribution of the heating and cooling foci in the area human bodies, for example, in a checkerboard pattern.

In the second case, a reverse thermal contrast thermal effect is carried out.

Further, for concreteness, a description is given of the operation of the device in an embodiment of the implementation of reversible isothermal thermal effects on a portion of the human body.

At initial inclusion body region temperature ranges from t to _{the beginning} of one of the pre-exposed amplitude values, e.g., in the cooling mode from _{the beginning} t = 37 ° C until t _st.min. In this case, the first switch 2 provides such a polarity of connecting groups 3 of thermocouples to the outputs of a direct current source 1, in which all groups 3 work in the same mode, namely, in cooling mode. In this case, the second switch 4 provides the connection to the comparison unit 7 of the first signal level from the two-level temperature setter 5, which causes the formation in the comparison unit 7, in accordance with the values of the signals received from the temperature sensors 8, of such a value of the control signal supplied to the input of the block 9 regulation of thermal power of thermocouples, in which by providing positional, proportional, PID control, etc. regulation of the current passing through the group of 3 thermocouples, achieved with the required accuracy on the working surface of the actuating element of the previously set temperature mode t _ct.min . The temperature regime t _{ct.min is} maintained for a period of time τ ₁ , the value of which is previously set when programming the block 6 of the program control.

After a period of time τ _1, the program control unit supplies a second-level control signal to the first switch 2 and the second switch 4, causing, firstly, through the first switch 2, to change the polarity of the voltage supplied from the DC source 1 to the group of 3 thermocouples, causing thereby, changing the direction of the thermal effect, in a particular case, the implementation of the heating mode, and secondly, connecting to the comparison unit 7, by means of the second switch 4, a signal of the second level from the setpoint 5 tempera tours. In turn, the latter causes the formation in the comparison unit 7, in accordance with the values of the signals received from the temperature sensors 8, of such a value of the control signal supplied to the input of the thermal power control unit 9 of the thermocouples, in which, by providing the selected method of regulating the current, for example , positional, proportional, PID control, etc., is achieved with the required accuracy on the working surface of the actuating element previously set tempo Saturn mode t _ct.max. The temperature regime t _{ct.max is} maintained for a period of time τ ₂ , the value of which is pre-set when programming the block 6 of the program control.

After a period of time τ _2, the program control unit 6 supplies the first level control signal to the first switch 2 and the second switch 4, again causing the reverse polarity of the voltage supplied from the source 1 to groups 3 of the thermocouples, which start in the cooling mode, decreasing by the first switch 2 the temperature of the heat-acting surface of the actuating element from t _ct.max to t _ct.min , as well as causing connection to the comparison unit 7 via the second switch 4 of the first level of the setter 5 temperatures. On the working surface of the actuating element during the interval τ _{1 is} maintained the temperature regime t _ct.min .

After a period of time τ ₁ , the program control unit 6 again transfers the device to work in the mode t _ct.max , maintaining its duration for a period of time τ ₂ .

Further, the above-described cycles of the device are periodically repeated.

Depending on the time supply program from block 6 to the first switch 2 and the second switch 4, the control signals of the first and second level in the proposed device can be implemented:

- cyclic isothermal reversible thermal effects with τ ₁ = τ ₂ = const or with τ ₁ = const, τ ₂ = const, but τ ₁ ≠ τ ₂ ;

- cyclic thermal contrast reversible thermal effects with the same or different frequency of reversal for each group of thermocouples operating in antiphase;

- cyclic reverse and thermal contrast effects with a frequency that varies according to the law of random numbers, etc.

The proposed device allows you to implement all kinds of options for the implementation on the human body isothermal or thermocontrast thermocyclic process with strictly controlled criteria parameters in order to achieve the desired therapeutic or prophylactic effect.

Claims (1)

A device for performing reversible thermal effects on a part of the human body, containing an actuating element in the form of groups connected in series or parallel to each other with thermoelements connected in series or in parallel, temperature sensors located on the heat-acting surface of the actuating element, a direct current source, a first switch connected to output of a direct current source, output connected to groups of thermocouples, program control unit, output for which is connected to the control input of the first switch, a block for controlling the thermal power of thermocouples, the contacts of which are included in the power circuit of the group of thermocouples, while a two-level temperature controller, a comparison unit, a second switch, and the control input of the second switch are connected to the output of the program control unit , the outputs of the two-level temperature controller are connected to the inputs of the second switch, the output of the second switch and the outputs of the temperature sensors are connected to moves the comparator and the output of the comparator is connected to a control input of the control unit.

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