RU5029U1 - IMPLANTED ELECTRIC STIMULATOR - Google Patents

Description

IMPLANTED ELECTRIC STIMULATOR

The utility model relates to medical equipment and can be used for self-stimulation of organs and tissues, for example, in urology for the treatment of atony of the urinary BUBBLE, in gastroenterology for the restoration of motor-evacuation functions of the intestine, as well as in SURGERY for the restoration of FUNCTIONS of organs and tissues, including lost as a result of illness or injury and after surgery, in addition, the DEVICE can be used as an internal myocardiostimulator.

Known electrical stimulator containing electrodes placed in the housing, in which a power source is installed, and the power source is made in the form of a set of ferroelectric elements, with a different number of sector contacts connected to the electrodes through a switching circuit, while the lever mechanism in contact with ferroelectric elements and associated with a key located on the housing, which also placed the switches connected to the ferroelectric elements 11,

Known electrical stimulator allows to stimulate the patient according to his immediate needs, however, its disadvantage is low efficiency

- 2 STIMULATIONS of internal organs, tissues and, as a result, long TERMS of treatment due to the use of percutaneous STIMULATION and inconvenience of the DESIGN of the stimulator for its implantation due to the need for great efforts to generate an electric pulse by ferroelectrics, as well as the bulkiness of the lever mechanism for compressing ferroelectrics and large quantities of its movement .

Known partially implantable multi-program electronic tissue STIMULATOR containing an implantable part and implantable electrodes electrically connected to it. In addition, the DEVICE contains a transmitting unit that controls the operation of the implantable part 2.

A disadvantage of the known device is its high complexity and low reliability due to the presence of an electromagnetic energy-information communication channel and a transmitting unit and low noise immunity from false and erroneous operations and distortions of electro-mules, as well as low safety due to the need to irradiate the patient with an electromagnetic field during the stimulation process.

The purpose of the utility model is to shorten the TERMS of treatment due to internal stimulation of organs and tissues by implantation, increase reliability, simplify the DESIGN, increase autonomy and control flexibility and improve operational characteristics by providing the possibility of self-stimulation and eliminating the remote communication channel and reducing EFFORTS during signal generation.

This goal is achieved by the fact that in the known partially implantable multi-program electronic tissue stimulator containing the implantable part and implantable electrodes electrically connected to it, the additional implantable part is made in the form of a capsule and

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contains an inductance coil with an open, magnetic circuit made of a permanent magnet, additionally introduced a mechanical switching element, which serves to close-open the magnetic circuit of the inductor, movably connected to it, a SPRING element, which serves to return the switching element to its original state and connected to it, and also DRIVE a mechanical switching element connected to it. In addition, the capsule is flat, the mechanical switching element is made in the form of a lever element consisting of a plate of ferromagnetic material, part of which is the first arm of the lever element and overlaps the open portion of the magnetic circuit between its poles, and the other part of which is the second arm of the lever element, extends beyond the inductance coil; A SPRING element is located between the second shoulder of the lever element and the bottom of the capsule and can be made, for example, of foam rubber; The drive of the mechanical switching element is made in the form of a flexible upper wall of the capsule. In addition, on the surface of the lever element facing the flexible wall of the capsule, on the side of its SECOND shoulder is a protrusion. In addition, INSIDE the capsule, a capacitor is mounted connected in parallel with the inductance coil. In addition, the inside capsule is metallized, moreover, the metal coating is connected to one of the terminals of the inductance coil. In addition, the mechanical switching element is made in the form of a cylinder closed from both ends and made of non-magnetic material, and a piston freely moving INSIDE the cylinder and made of a set of alternating disks of non-magnetic and magnetic materials; A spring element is located between the first bottom of the cylinder and

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piston; the poles of the magnetic circuit of the inductor are mounted in the cylinder wall opposite to each other in diameter to the LEVEL of the inner surface of the cylinder; THE DRIVE of the mechanical switching element is made hydraulic and contains an elastic PEAR, a tube connecting it to the hole in the SECOND day of the cylinder of the switching element, and hydraulic fluid filling the saddle, the tube and the space between the SECOND bottom of the cylinder and the piston. In addition, the hydraulic fluid is biocompatible, for example. Saline solution.

On Fig, i shows a functional diagram of an implantable electro with a stimulator.

In FIG. 2 shows a functional diagram of an implantable electrical stimulator with a remote drive arrangement.

In FIG. Figure 3 shows the shape of the pulse generated by applying pressure.

In FIG. 4 shows the shape of the pulse generated upon depressurization.

In FIG. 5 is a sectional view of a stimulator with a combined drive.

in FIG. b shows the position of the working elements of the stimulator of FIG. 3 when you click on it.

In FIG. 7 shows the shape of the damped oscillatory

STIMULATING PULSES.

In FIG. 8 is a cross-sectional view of an implantable electrical stimulator with a protrusion on a lever member. In FIG. 9 is a sectional view of a stimulator with

- 5 in FIG. 11 shows the sequences generated

STIMULATING PULSES.

The implantable electrical stimulator (Fig. 1) contains a system of electrodes 1, which are bundles of thin, for example, nichrome wire in polyethylene or PTFE insulation (for example, PEVN-3 brand), the stimulating ends of which are freed from insulation, or plates of indifferent material (for example , platinum) depending on the specific purpose of use; a capsule d of a bioinert dielectric material containing a mechanical switching element 3 with a connected WIRE 4, a magnetic circuit 5 of an inductor b, connected to the output of a switching element 3, also connected to a SPRING element 7, acting on the switching element 3, the output of the coil b is connected to electrodes 1. DRIVE 4 of the switching element 3 (Fig. 2) can be located outside the capsule 2.

An implantable ELECTRIC STIMULATOR (Fig. 5), the ACTUATOR 4 of which is combined with the capsule contains the electrode system 1, the FLAT capsule 2 of a round, RECTANGULAR or OTHER FORM in plan, the top (according to the diagram) wall 8 of which is flexible and is ACTUATOR 4 of the switching element 3, which made in the form of a lever element 9 - a plate of ferromagnetic material consisting of the first 10 and second parts AND, the first part 10 of the lever element 9 stands for the inductance coil b; A spring element 7, for example, FOAM, is located between the first part 10 and the bottom of the capsule 2; the second part AND of the lever element 9 overlaps the distance between the first 12 and second 13 poles of the magnetic circuit 5 of the inductance coil b, which is a permanent magnet, while

the end surfaces of the poles 12 and 13 and the parts of the surface of the lever element 9 that are adjacent to them should be ground as best as possible FRIEND to FRIEND; the conclusions of the inductor b are withdrawn from the capsule 2 and connected to the electrode system 1. A capacitor 14 may be located in the capsule body 2, the terminals of which are connected to the terminals of the coil b, on the first part 10 of the lever element 9 from the side opposite to the spring element 7, it can be a protrusion 15 is located, abutting against the Flexible wall 8 from the inside of the capsule 2 (Fig, 8).

An implantable electric STIMULATOR (Fig. 9) with a HYDRAULIC drive located outside the capsule 2 contains a system of electrodes 1, a capsule 2 of bioinert material, a magnetic circuit 5 of a permanent magnet with an inductor b, SPRING element 7, HYDRAULIC 4 of the switching element 3, containing elastic PEAR 17 connected to one end of the tube 18, made of bioinert material, and filled with a biocompatible hydraulic fluid 19; the switching element 3 consists of a piston 20 made in the form of a set of alternating non-magnetic 21 and magnetic parts

22 (at least one), made in the form of disks, a cylinder 23 of non-magnetic material, closed at both ends by the first and second bottom 24 and 25, respectively, in the cylinder

23 the piston 20 is freely mixed; A SPRING element 7 is located between the first bottom 24 of the cylinder 23 and the piston 20, and the SECOND end of the tube 18 of the hydraulic actuator 4 is connected to the hole in the SECOND 25 bottom of the cylinder 23; the poles 12 and 13 of the magnetic circuit 5 are mounted INSIDE the cylinder 23 to the LEVEL of its inner surface.

necessary places of the patient’s internal tissues and are FIXED with medical glue, catgut or Fibrin threads with suture material, etc. The stimulator capsule 2 is implanted subcutaneously in any convenient place, for example, over the oblique muscle of the abdomen in case of STIMULATION of the abdominal organs and if the mechanical switching element 3 is combined with its DRIVE 4 located in the capsule (Fig. 1). If the ACTUATOR 4 of the switching element 3 is located outside the capsule 2, (FIG. 2), then the capsule 2 can be implanted in close proximity to the electrodes 1, for example, under the aponeurosis of the Rectus abdominis muscle in the Mentioned case, and the actuator 4 of the switching element 3 is implanted separately, for example under the SKIN in the submandinal cavities. Thus, the electrode system 1 is connected to the capsule 2 of the stimulator and its DRIVE 4 INSIDE the body without removing any parts to the outside, which contributes to high infectious lameness and increases the possible duration of the stimulator in the body. In the initial position, the switching element 3 closes the open part of the magnetic circuit 5 of the inductor b due to the fact that the magnetic circuit 5, being a permanent magnet, attracts the movable part of the switching element 3 and holds it in this state. When the switching element 3 is pressed through the skin COVER to the DRIVE 4, it transfers the pressing force directly or with amplification to the switching element 3, as a result of which, due to the non-linearity of the pressure-moving system characteristics, the magnetic circuit 5-switching element 3 The separation of the moving part of the switching element 3 from the poles of the open part of the magnetic circuit 5 of the inductance coil b. Magnetic flux from a permanent magnet, is- 8

of the magnetic circuit 5, changes abruptly, and in the winding of the coil b an electric IMPULSE with an amplitude of up to 70 V and a duration of 2-3 ms is induced (Fig. 3). WHICH enters the stimulating electrodes 1 and STIMULATES, At the same time, when the switching element 3 is moved, the spring element 7 is compressed , When releasing the skin, the pressure is removed from the actuator 4 of the switching element 3, which removes the pressure applied to it from the latter, as a result of which the SPRING element 7, straightening, translates lyuchatelny element 3 to the original state, a magnetic circuit 5 katuschki 6 overlaps sharply, resulting in the generation of a pulse of opposite polarity (Fig. 4) is also input to the electrodes and generating stimulation. The patient can adjust the number of STIMULATIONS, the frequency of their admission, as well as the length of the pause between positive and negative impulses independently according to their feelings and needs in a SIMPLE way, without resorting to any external additional means or outside help.

In the case of combining the actuator 4 with the switching element (Fig. 5), the capsule 2 is implanted so that its flexible wall 8 is located in the outer side directly under the skin. If necessary, STIMULATION, the patient himself presses the SKIN at the implantation site of the capsule 2 and the flexible wall 8 bends to the lever element 9, the pressure of which is transmitted to the first part of WHICH 10. In this case, the second part 11 of the lever element 9 rises and its end is torn off from the magnetic circuit 5 of the inductor 6 at its first pole 12, and the shaft element 9 is rotated

SPRING element 7. After stopping pressing the SKIN, the lever element 9, under the action of the expanding spring element 7, returns to its initial state with the TURNED end of the SECOND part 11 to the first Pole 12 of magnet 5, as a result of which a negative POLARITY pulse is generated in the coil winding b. If it is necessary to generate damped oscillations as STIMULATING pulses (Fig. 7), a capacitor 14 is switched on parallel to the coil b, forming an oscillating circuit with it (Fig. 8). To reduce the amount of deflection of the tissues when pressed, the lever element 9 may have protrusion 15 (Fig, 8). Moreover, the stiffness of the spring element 11 is selected so that it exceeds the stiffness of the flexible wall 8 of the capsule 2. Metallization 16 of the capsule 2, applied to its entire surface from the inside, serves as a screen and is connected to one of the terminals of the coil b.

In the case of the remote location of the actuator 4 and its hydraulic operation (Fig. 9), pressing is applied to the skin COVER at the site of implantation of the elastic mass 17. The pressure transmitted through the tube 18 through the hydraulic fluid 19 is applied to the piston 20 of the switching element 3. If the threshold pressure is exceeded Values There is a separation of the metal part 22 of the piston 20 from the poles 12 and 13 of the magnet-magnetic circuit 5, its movement in the cylinder 23 and the generation of an electrical pulse in the coil winding b (Fig. 10.11). The piston 20 compresses the SPRING element 7. In this case, if the piston contains several metal parts 22 (Fig. 10), it is possible to select the stiffness of the spring element 7 so that with one click on PEAR 17, the piston 20 is mixed so much that the poles 12 and 13 jump past all metal parts 22 PISTON 20 and at the same time in the coil b a series of pulses is generated by the number of parts 22, and

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POLARITY OF PULSES alternates (Fig. 11). After depressurization, the SPRING element 7 returns the piston 20 to its original position, while all the metal parts 22 of the PISTON 20 pass in reverse order past the poles 12 and 13, which leads again to the generation of a series of PULSES of the mirror-symmetric first PULSE sequence (Fig. I).

The proposed implantable electrical stimulator compared with known devices for electrical stimulation, including PROTOTYPE, has the following advantages:

- shorter periods of treatment due to the introduction of additional elements that allow to obtain significant energy STIMULATION with direct STIMULATION of internal organs and body tissues;

-a high degree of SIMPLICITY and reliability due to the small number of elements used, the lack of chemical power sources for the radio channel and transceiver;

-high noise immunity due to the use of mechanical control by pressing the skin at the site of implantation of the capsule;

- high flexibility and autonomy of control, BECAUSE due to the introduction of additional elements, STIMULATION can be performed by the patient himself at the time necessary for him and according to his feelings, as well as vary the parameters of stimulation, thereby providing feedback on his condition;

- higher safety, because due to the use of mechanical control of the STIMULATOR there are no transmitting means that are sources of electromagnetic radiation and adversely affect the body; additionally bipolar elements introduced, allowing to GET PULSES in each STIMULATION cycle. Sources of information taken into account.

1. USSR copyright certificate

2. Application EPO N0072 611, LM A61N1 / 36. 1/08, 1983

THE AUTHORS: . M. Bakusov

V.M. Timerbulatov

0. G. Trukhanov

 A.V. Saveliev N1512624, IKI A61Y1 / 36.1989.

Claims (7)

1. An implantable electrostimulator containing an implantable part and implantable electrodes electrically connected to it, characterized in that the implantable part is made in the form of a capsule and contains an inductance coil with an open magnetic circuit made of a permanent magnet, an additional mechanical switching element is used for closing-opening the magnetic circuit of the inductor, a spring element movably connected to it, which serves to return the switching element to ref The battery condition, as well as mechanical drive switching element.  2. An electrical stimulator according to claim 1, characterized in that the capsule is made flat, the mechanical switching element is made in the form of a lever element consisting of a plate of ferromagnetic material, one part of which is the first shoulder of the lever element, overlapping an open portion of the magnetic circuit between its poles, and the other part of the plate, which is the second arm of the lever element, is protruding beyond the inductor, the spring element is located between the second arm of the lever element and the bottom m capsule and is made, for example, of foam rubber, the drive of the mechanical switching element is made in the form of a flexible upper wall of the capsule.  3. Electrical stimulator according to claims 1 and 2, characterized in that on the surface of the lever element facing the flexible wall of the capsule, a protrusion is located on the side of its second shoulder.  4. Electrical stimulator according to claims 1 to 3, characterized in that a capacitor is installed inside the capsule, connected in parallel with the inductor.  5. Electrical stimulator according to claims 1 to 4, characterized in that the capsule is metallized from the inside, and the metal coating is connected to one of the terminals of the inductor.  6. The electric stimulator according to claim 1, characterized in that the mechanical switching element is made in the form of a cylinder closed at both ends and made of non-magnetic material, and a piston freely moving inside the cylinder and made of a set of alternating disks of non-magnetic and magnetic materials , the spring element is located between the first bottom of the cylinder and the piston, the poles of the magnetic circuit of the inductor are mounted in the cylinder walls opposite each other in diameter to the level of the inner surface of the cylinder, the drive of the mechanical switching element is made hydraulic and contains an elastic bulb, a tube connecting it to the hole in the second bottom of the cylinder of the switching element, and hydraulic fluid filling the bulb, tube and the space between the second bottom of the cylinder and the piston.  7. Stimulator according to claims 1 to 6, characterized in that the hydraulic fluid is biologically compatible, for example, saline.