SU1659061A1 - For electrical therapy - Google Patents

Abstract

This invention relates to medicine and can be used for electrotherapy. The purpose of the invention is to increase the effectiveness of electrotherapy by monitoring the patient. The goal is achieved by introducing into the device a controlled resistor 3, a comparator 12. the first 11 and second 14 resistors, the measuring unit 16. the detector 15 and the third diode 13. 1 sludge.

Description

The invention relates to medical equipment, namely to devices for electrotherapy.

The purpose of the invention is to increase the effectiveness of electrotherapy by exercising control over the patient.

The drawing shows a functional diagram of a device for electrotherapy.

The electrotherapy device comprises first and second electrodes 1 and 2, a controlled resistor 3, first and second diodes 4 · and 5, a capacitor 6, a generator 7, a power supply 8, a key 9, a transformer 10, a first resistor 11, a comparator 12, third diode 13, second resistor 14, detector 15, measuring unit 16.

The device operates as follows.

The generator 7 sets two modes of operation of the device - the mode of electrical exposure and the noise. In addition to the main purpose - the formation of electrotherapy current pulses 4, the generator 7 together with the key 9, the source 8 and the transformer 10 provides pulsed power for the comparator.

During the time when the key 9 is closed, the supply voltage is supplied to the comparator 12, which, in turn, sets the current through the controlled resistor 3. The value of this current is determined by the error signal at the input of the comparator. Comparator '2 controls resistor 3 so that 4 rezoelectrodes 1 and 2, to which the biological object (patient) is connected, flow Current causing a voltage drop across resistor 11 equal to the voltage across the resistor divider of comparator 12. Current in the patient circuit in the key short-circuit phase 9 is stabilized by negative feedback 4 through the electrodes 1 and 2, the comparator 12 and the controlled resistor 3.

During a pause, when the key 9 is open, the energy of the magnetization current passes to the capacitor 6, which is accompanied. © by recharging to high voltage (400 V).

During the working period, when the switch 9 is closed, the voltage of the capacitor 6 charged during a pause is added to the voltage in the secondary winding of the transformer 10.

During a pause, the polarization capacitance. the patient is discharged through diodes 13 and 15. Diode 5 is in the open state due to the current recharging the capacitor 6.

The detector 15 rectifies the voltage signal in the primary winding, which is proportional to the voltage to which the capacitor 6 is charged. In turn, the voltage on the capacitor 6 depends on the resistance between the electrodes 1 and 2. Since the current through these electrodes is kept almost constant, the current through the controlled resistor 3 realizes the voltage across the capacitor 6, for example, when the interelectrode resistance decreases, the current through the controlled resistor 3 increases, the voltage across the electrode 1 decreases, and also decreases yazhenie the capacitor. In response to this, the negative voltage pulse at the input of the detector 15 decreases. This decrease shows the measuring unit 16.

The transformer 10 allows not only to obtain a high voltage voltage on the capacitor 6. It also provides galvanic discharge of the patient from the power unit 8, from which the units 7, 15 and 16 are fed.

The shape of the current pulses is set using the voltage divider in the comparator 12.

A side positive effect is to increase the efficiency of the device due to the beneficial use of magnetization energy accumulated during the working cycle and spent during the pause for charging the capacitor.

Claims (1)

Claim Electrotherapy device containing a power source, a key, a transformer, the first and second diodes, a capacitor, a generator, the first and second electrodes, and the power source is connected via a key to the primary winding of the transformer, characterized in that, in order to increase the effectiveness of electrotherapy by monitoring for a patient, a controlled resistor, a first resistor, a comparator, a third diode and a second resistor connected in parallel, as well as a series-connected detector and measuring unit, are introduced into it, The key control input is connected to the generator output, a capacitor is connected between the anode of the first and the cathode of the second diode, the secondary winding of the transformer is connected between the anodes of the first and second diodes, the first output of the controlled resistor is connected to the anode of the second diode, the first resistor is connected between the second electrode and the anode of the second diode , the comparator power bus is connected between the cathode of the first and the anode of the second diode, the input of the controlled resistor is connected to the output of the comparator, the first electrode is connected to the second output the controlled resistor and the anode of the third diode, the cathode of which is connected to the cathode of the second diode, the detector input is connected to the primary winding of the transformer, the comparator input is connected to the second electrode.