CN204073105U - Implanted self energizing cardioverter-defibrillator - Google Patents

Abstract

The utility model provides an implantable self-powered cardioverter defibrillator, which comprises: a heart rhythm monitoring part, a pulse generator, a stimulating electrode and a power generation part. The power generation unit includes a power generation body, an output unit, an electric energy storage unit, a fixing unit and an encapsulation layer. Wherein, the power generating body is a multi-layer film structure, including a piezoelectric material layer located in the center of the power generating body, and electrode layers located on both sides of the piezoelectric material layer. The output unit is connected with the electrode layer, and is used for outputting the current generated by the power generating body to the electric energy storage unit. The electrical energy storage unit is used to store electrical energy and power the cardiac rhythm monitoring unit and the pulse generator. The fixing unit is located on the edge of the generating body and is used for fixing the generating body on the epicardium. The encapsulation layer covers the surfaces of the generating body, the output unit, the electric energy storage unit and the fixing unit. The self-powered cardiac defibrillator of the utility model does not need to replace batteries and can be used for a lifetime.

Description

implantable self-powered cardioverter defibrillator

technical field

The utility model relates to an implantable cardioverter defibrillator, which belongs to the field of medical equipment.

Background technique

With the deepening of human understanding of various diseases, more and more diseases can be diagnosed or treated with implanted electronic devices.

Patients with severe ventricular arrhythmias are currently treated with an implantable cardioverter-defibrillator. However, since the existing internal implantable cardioverter-defibrillator uses batteries as a power source, once the battery energy is exhausted, the battery needs to be replaced by a surgical operation, which will cause both physical pain and psychological distress to the patient. It also increases the financial burden on patients and their families.

Utility model content

In order to solve the above problems, the utility model provides an implantable self-powered cardioverter defibrillator, which is characterized in that it includes: a chip for measuring heart rate, a pulse generator, a stimulating electrode and the monitoring part and the The power generation section powered by the pulse generator described above. The power generation unit includes a power generation body, an output unit, an electric energy storage unit, a fixing unit and an encapsulation layer. Wherein, the power generating body is a multi-layer film structure, including a piezoelectric material layer located in the center of the power generating body, and electrode layers located on both sides of the piezoelectric material layer. The power generating body is attached to the surface of the heart to collect heart energy for generating electric energy. The output unit is connected with the electrode layer, and is used for outputting the current generated by the power generating body to the electric energy storage unit. The electrical energy storage unit is used to store electrical energy and power the cardiac rhythm monitoring unit and the pulse generator. The fixing unit is located on the edge of the generating body and is used for fixing the generating body on the epicardium. The encapsulation layer covers the surfaces of the generating body, the output unit, the electric energy storage unit and the fixing unit.

In addition, the implantable self-powered cardioverter defibrillator of the present invention may also have such a feature: wherein, the shape of the generating body is a quadrangle, and the output unit is located in the middle of the two narrow sides of the quadrangle.

In addition, the implantable self-powered cardioverter defibrillator of the present invention may also have such a feature: wherein, the shape of the generating body is a triangle, and the output unit is located at the three vertices of the triangle.

In addition, the implantable self-powered cardioverter defibrillator of the present invention may also have such a feature: wherein, the shape of the generating body is oblong.

In addition, in the implantable self-powered cardioverter-defibrillator of the present invention, it may also have such a feature: wherein, the piezoelectric material layer contains a nanoscale piezoelectric material, and the nanoscale piezoelectric material is a piezoelectric crystal, Any of piezoelectric ceramics and organic piezoelectric polymers.

In addition, the implantable self-powered cardioverter-defibrillator of the present invention may also have such a feature: wherein, the piezoelectric crystal is at least one layer of zinc oxide nanowire array.

In addition, in the implantable self-powered cardioverter defibrillator of the present invention, it can also have such a feature: wherein, piezoelectric crystals, piezoelectric ceramics, and organic piezoelectric polymers can be made of nanoscale piezoelectric materials. Single or multi-layer structure.

In addition, the implantable self-powered cardioverter-defibrillator of the present invention may also have such a feature: wherein, the output unit has an output electrode and a rectification filter circuit.

In addition, the implantable self-powered cardioverter-defibrillator of the present invention may also have the following feature: wherein, the encapsulation layer uses a flexible polymer insulating material with good biocompatibility as the encapsulation material.

Function and effect of utility model

According to the implantable self-powered cardioverter defibrillator of the present invention, since the power generating body is directly attached to the surface of the heart, the contraction and relaxation of the heart can effectively deform the nanoscale piezoelectric material, thereby converting it into electrical energy . Therefore, as long as the heart is beating, the utility model can utilize the patient's own bioenergy to provide electric energy, avoiding the necessity of using a battery as a power source, and solving the problem of requiring surgery to replace the battery after the battery energy is exhausted.

In addition, since the power generation main body of the utility model fixes the power generation system on the epicardium in a point-fixed manner, on the one hand, it can effectively collect the energy generated by the heart movement, and on the other hand, it will not significantly affect the systolic and diastolic movements of the heart. Impact.

Since the utility model adopts the nano-scale piezoelectric material as the power generation main body, it can not only effectively convert the biological energy in the body into electric energy, but also has a small volume, which is more suitable for implantation in the body.

In addition, since the utility model is packaged with a flexible polymer insulating material with good biocompatibility, it can not only isolate the power generation body from the internal environment, but also effectively transmit the pressure generated by the heart deformation to the piezoelectric material.

Moreover, since the power generating body of the present invention is located outside the heart and does not directly contact with blood, there is no risk of thrombus formation and stroke (myocardial infarction or cerebral infarction).

Description of drawings

Fig. 1 is a schematic diagram of an implantable self-powered cardioverter defibrillator according to Embodiment 1 of the present invention, in which the power generation main body is a quadrilateral,

Fig. 2 is a partial cross-sectional view of the power generating body of the implantable self-powered cardioverter defibrillator according to Embodiment 1 of the present utility model;

Fig. 3 is a schematic diagram of an implantable self-powered cardioverter defibrillator according to Embodiment 2 of the present invention, in which the main body of power generation is a triangle;

Fig. 4 is a schematic diagram of a modified example of the utility model in which the main body of the power generation is oblong; and

Fig. 5 is a circuit diagram of the utility model embodiment.

Detailed ways

The specific embodiment of the defibrillator of the present utility model is described below in conjunction with accompanying drawing,

<Example 1>

Fig. 1 is a schematic diagram in which the power generation body of the implantable self-powered cardioverter defibrillator in Embodiment 1 is a quadrilateral. As shown in Fig. The pulse generator 17, the stimulating electrodes 18, and the cardiac rhythm monitoring unit are not shown in the figure. Wherein, the power generating unit 200 includes a power generating body 21 , an output unit, an electric energy storage unit 16 and a fixing unit 22 . The generating body 21 is rectangular, and has a fixing unit 22 on each of the two narrow sides of the rectangle, which is used to fix the generating body on the epicardium in the long axis direction along the systolic direction. When the power generating body is implanted, the heart is exposed through surgery, and the power generating body is set along the direction of cardiac contraction and the fixing part is sutured on the epicardium, so that the power generating body and the epicardium fit together. At this time, the power generating body It deforms with the beating of the heart.

The fixing unit 22 is composed of an encapsulation layer, and there is no power generation structure such as electrodes or piezoelectric materials inside the fixing unit 22 , so the power generation structure of the power generation body 21 will not be damaged when it is fixed with sutures. Except for being fixed by the fixing unit, the rest of the power generating body is not fixed, so that the power generating body can be better deformed in the process of cardiac contraction. The output unit includes an output electrode 14 and a rectification and filtering circuit 15 . The output electrode 14 is used to output the electric energy generated by the power generating body 21 to the electric energy storage unit 16, and there is a rectification filter circuit 15 before the electric energy storage unit 16, which is used to rectify and filter the current output by the output electrode 14, so that the output current more stable. The pulse generator 17 and the monitoring unit (not shown in the figure) are powered by the electric energy storage unit 16 to work. When the monitoring part detects ventricular arrhythmia, the pulse generator 17 will send electrical stimulation to the myocardium through the stimulating electrode 18, so that the heart rhythm returns to normal. Fig. 2 is the cross-sectional view of the power generation main part of the implantable self-powered cardioverter defibrillator of the utility model embodiment, as shown in Fig. 2, the power generation main body 21 is a multi-layer film structure, and its central layer is piezoelectric Material layer 31, piezoelectric material layer 31 is made up of ZnO nanowire array, the two sides of piezoelectric material layer 31 are respectively electrode layer 32 and electrode layer 33, and electrode layer 32 and electrode layer 33 are connected with output electrode 14 respectively (Fig. not shown in ). The encapsulation layer 34 is located outside the electrode layer 32 and the electrode layer 33, and the encapsulation layer 34 has good insulation and biocompatibility.

Fig. 5 is the circuit diagram of the utility model embodiment, as shown in Fig. 5, the power generation main body 21 is connected with the rectification filter circuit 15, and the electric energy that the power generation main body 21 produces charges the electric energy storage unit 16 after the rectification filter circuit 15, and the electric energy storage The unit 16 is used for powering electrical appliances, namely the heart rhythm monitoring unit and the pulse generator in this embodiment.

<Example 2>

Fig. 3 is a schematic diagram of a triangular implantable self-powered cardioverter defibrillator according to an embodiment of the present invention, as shown in Fig. Each vertex of the triangle has a fixed unit 13, the output electrode 14 is connected to the electrode layer (not shown in Figure 3), the rectifier filter circuit 15 is connected to the output electrode 14, and the electric energy storage unit 16 is connected to the rectifier The filter circuit 15 is then used to store the electric energy generated by the power generation unit.

As shown in FIG. 3 , the power generating body 12 is triangular in shape. When it is installed on the epicardium, the power generating body 12 is fixed on the epicardium of the myocardial wall by using the output unit 13 located at the three vertices of the triangle. However, each side of the triangle of the power generating body 12 is not fixed, which neither restricts the contraction and relaxation of the heart, but also facilitates the deformation of the piezoelectric material layer along with the movement of the heart to generate electric energy.

The advantage of making the power generation body 12 triangular is that it can collect more energy from the beating heart. This is because there are not only horizontal contraction and relaxation during the beating of the heart, but also longitudinal contraction and relaxation. When the triangular shape is adopted, One apex of the triangle is set toward the direction of the apex, and the other two apexes are set parallel to the direction of the heart's transverse contraction, so that whether the heart is in a transverse contraction or a longitudinal contraction, it can drive the generator body 12 to deform. Therefore, the shape of the triangle can use more energy generated by the beating of the heart than the shape of the quadrilateral.

The rectifying and filtering circuit 15 is connected behind the output electrode 14, and the current generated by the power generating body 12 is rectified and filtered and then stored in the electric energy storage unit 16, which is a miniature rechargeable battery. When the cardiac rhythm monitoring unit (not shown in FIG. 3 ) detects arrhythmia, the pulse generator 17 will control the stimulating electrode 18 to send a stimulating current to stimulate the myocardium, so that the cardiac rhythm returns to normal.

<Modification>

Compared with the first embodiment, this modified example has the same configuration except that the shape of the generating body is oblong. As shown in Figure 4, the shape of the generating body 42 is oblong, and there are fixed units 41 at the two vertices of the oblong. to reduce damage to the heart.

Certainly, the shape of the generator main body of the implantable self-powered cardioverter defibrillator of the present invention can be in various shapes, not limited to the triangle, quadrangle and oblong in the above two embodiments.

Claims (7)

1. an implanted self energizing cardioverter-defibrillator, is characterized in that, comprising:

For generation of the pulse generator of electricity irritation;

The stimulating electrode be connected with described pulse generator;

For measuring the chip of heart rate; And

For the Power Generation Section that described chip and described pulse generator are powered,

Wherein, described Power Generation Section comprises generating main body, output unit, energy storage unit, fixed cell and encapsulated layer,

Described generating main body is multi-layer film structure, comprises the piezoelectric material layer being positioned at described generating main center, and is positioned at the electrode layer of piezoelectric material layer both sides, described generating main body by being attached at heart surface to gather cardiac energy for generation of electric energy,

Described output unit is connected with described electrode layer, exports to described energy storage unit for electric current generating main body produced,

Described energy storage unit is used for storage of electrical energy and powers for described chip and described control part,

Described fixed cell is positioned at the edge of described generating main body, for generating main body is fixed on visceral pericardium,

Described encapsulated layer is covered in the surface of described generating main body, described output unit, described energy storage unit and described fixed cell.

2. implanted self energizing cardioverter-defibrillator as claimed in claim 1, is characterized in that:

Wherein, the shape of described generating main body is tetragon, and described fixed cell is positioned at the centre on two narrow limits of tetragon.

3. implanted self energizing cardioverter-defibrillator as claimed in claim 1, is characterized in that:

Wherein, the shape of described generating main body is triangle, and described fixed cell is positioned at leg-of-mutton three summits.

4. implanted self energizing cardioverter-defibrillator as claimed in claim 1, is characterized in that:

Wherein, the shape of described generating main body is Long Circle.

5. implanted self energizing cardioverter-defibrillator as claimed in claim 1, is characterized in that:

Wherein, described piezoelectric material layer contains nanoscale piezoelectric, and described nanoscale piezoelectric is any one in piezoquartz, piezoelectric ceramics and organic piezopolymer, and described piezoquartz is at least one deck zinc oxide nano-wire array.

6. implanted self energizing cardioverter-defibrillator as claimed in claim 5, is characterized in that:

Wherein, described piezoquartz, piezoelectric ceramics, organic piezopolymer can be the single or multiple lift structure of nanoscale piezoelectric.

7. implanted self energizing cardioverter-defibrillator as claimed in claim 1, is characterized in that:

Wherein, output unit has output electrode and current rectifying and wave filtering circuit.