SU1627189A1 - Implantable electrostimulator - Google Patents

Abstract

This invention relates to medicine, namely to implantable electro-stimulators. The purpose of the invention is to maintain a constant value of the patient's tissue response by changing the shape of the stimulating pulses. The electrostimulator contains a transmitting device 1 and a receiving device 2. The transmitting device 1 consists of a generator 3 stimulating pulses, the first differentiating element 4, the first generator 5 of duration, the first amplifier 6, the switch 7, the inductor 8, the frequency divider 9, the second differentiating element 10, the second generator 11 duration and the second amplifier 12. Receiver 2 consists of an encapsulated communication kit 13 with conductors 14 and electrodes 15. The inductor contains an armored open toroidal ph A core with an inductive coil, a clip with wires. The coil 13 of the connection is placed in the capsule. 3 il. Yo

Description

Fig 1

The invention relates to medicine, namely to implantable electrostimul - mountains,

The purpose of the invention is to maintain a constant value of the patient's tissue response due to a multiple increase in amplitude and a change in the form of stimulating impulses.

1 shows a functional diagram of the device; Fig. 2 shows an inductor and a coupling coil; Fig 3 - the axis. output pulse logs.

 The device (figure 1) contains the transmitting device 1 and the receiving device 2. The transmitting device 1 consists of a generator 3 stimulating pulses, the first differentiating element HI a 4 first generator 5 duration, the first amplifier 6, switch 7, inductor 8, divider 9 frequency, the second differentiating element 10, the second generator 11 duration and the second amplifier 12.

Receiver 2 consists of an encapsulated flat inductive coupling coil 13, conductors 14 and electrodes 15,

The inductor 8 (Fig. 2) contains an armored open toroidal ferrocord 16 with an inductive coil 17, a ferrule 18, from which insulated supply wires 19 come out.

Receiver 2 contains a flat inductive coupling coil 13 with a length at least an order of magnitude smaller than its diameter, placed in a capsule 20, from which the insulated wires L connected to the implant and electriodes 15 come out.

The device works t - manner.

Puncture the patient into the epidural space of the avod electrodes 15, which are then connected with wires 14 to an indifferent flat connection tube 13 that is implanted under the skin at a convenient place.

During the electrostimulation session, an induction 8 of the end portion is positioned over a communication receiving coil 13 implanted under the skin, in which a quasi-rectangular and bipolar impulse transmitting transmitter with conductors 14 is guided to the electrodes 15.

The stimulating pulse generator 3 generates periodic pulses, the repetition rate of which is equal to the hour of repetition of the working pulses applied to the electrodes 15 They are differentiated

the first differentiating element 4 and launching the first generator 5 of duration, forming quasi-rectangular pulses, the duration of which is equal to the duration of the working pulses on the electrodes 15 of the first polarity (let's call it conditionally positive). The pulses of the first generator 5 are amplified in amplitude and power by the first amplifier 6

(operating in key mode), in the output circuit of which, via switch 7, an electromagnetic inductor C is turned on, producing a pulsed magnetic field

With the appropriate position of the switch 7, the output pulses of the first amplifier 6 are fed to a frequency divider 9 or directly to the second differentiating element 10. Short pulses from the output

the second differentiating element 10 starts the second generator 11 of duration forming quasi-rectangular pulses with a duration equal to the duration of conditionally negative working pulses on the electrodes 15. The pulses of the Bioporo generator 11 of duration are amplified by the second amplifier 12 with a polarity opposite to that of the pulses of the first amplifier 6. and The switch 7 is fed to the inductor 8.

The position of the switch 7 determines the type of induced emf in the coil 13 of the connection, which determines the shape of the anesthetic current pulses flowing between the electrodes 15. A dependent set of a combination of unipolar and bipolar can depend on the position of the switch 7 pulses in spilled percentages.

Periodic can be obtained

unipolar pulses with varying over a wide range of duration, often that repetition, duty cycle and amplitude (Fig. 3a). Only the main one works

a pulse shaping channel, and the trigger pulses are turned off and o; divider

9 frequencies m from the second differentiating element 10.

Bipolar impuces (phi 30) are obtained by applying a signal from the first amplifier 6 to the second differentiating element.

10 separator 9 often responds. In this case, the front of the pulses of the second differentiating element 10 corresponds in time to a slice (falling front) of the pulses of the osnag channel, which triggers the second generator 11 of duration after the formation of a pulse, measured i.e.-H i: iTotJa 5 of duration.

Alternating bipolar and unipolar pulses with different percentages (Fig. 3b, d) are obtained by applying starting pulses to frequency divider 9 with different division factors.

Bipolar pulses with different ratios of durations and all sorts of combinations with unipolar pulses (Fig. 3A, g) are obtained by choosing unequal durations of the main and additional channels. When the polarity of switching on of the inductor 8 changes, it changes to the opposite polarity of any of the considered types of pulses.

When the pulse shape changes, the patient's tissue response is kept constant.

Claims (3)

1. An implantable electrostimulator containing a stimulating pulse generator, a first duration generator, a switch, the output of which is connected to an inductor output inductively coupled to a communication coil, characterized in that, in order to maintain a constant value of the patient’s tissue response increases in amplitude, l and changes in the form of stimulating pulses; the first differentiating element, whose input is connected to the output of the generator of stimulating pulses, and the output to the input of the first generator of duration, the first amplifier, the input of which is connected to the output of the first generator of duration, and the output to the first input of the switch, a serially connected frequency divider, the second differentiating element, the second generator duration, the second amplifier, the output of which is connected to the second input of the switch, the first output of which is connected to the input of the frequency divider, and the second output is connected to the input of the second differentiating element, and the generator of stimulating pulses and pulse duration generators are made in the form of a video pulse frequency generator and a video pulse duration generator, respectively. 2. The electrostimulator according to claim 1, of which is an inductor made in the form of an armored open toroidal ferrocord with an inductive coil in it. 3. The electrostimulator according to claim 1, wherein the communication coil is designed as an encapsulated inductive coil with a length of less than its diameter. 74 15 r-TV-PPq J-UJl d Fig.Z