CN203886012U - Power generation system for heart - Google Patents

Abstract

The utility model provides a heart power generation system, which is characterized in that it comprises: a power generation main body, an output part, a fixing part and a packaging layer. Among them, 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 electrical energy. The fixing part is located at the edge of the generating body and is used for fixing the generating body to the epicardium. The encapsulation layer covers the surfaces of the generating body, the output part and the fixing part. The output part is connected with the electrode layer, and is used for delivering the electric energy generated by the power generating body to the implanted electronic device. The heart nano power generation system of the utility model can continuously generate electric energy as long as the heart beats, thereby realizing continuous power supply to implanted electronic devices, eliminating the necessity of using batteries as power sources, and solving the problem of surgical replacement of batteries after battery energy exhaustion question.

Description

cardiac power system

technical field

The utility model relates to a heart power generation system, which belongs to the field of medical equipment.

Background technique

With the development of medical technology, more and more diseases can be treated by implanted medical electronic devices in the body. However, until now, medical electronic devices put into clinical applications all require batteries as a source of electrical energy. For medical electronic devices implanted in the body, once the battery energy is exhausted, the battery needs to be replaced by surgical operation. This will not only cause physical and mental pain to patients, but also increase the financial burden on patients and their families.

Inside the human body, both the contraction of the heart and the flow of blood have steady and uninterrupted kinetic energy. If a small portion of this kinetic energy can be harvested and converted into electricity, it is expected to power a variety of implantable electronic devices.

However, since the heart is the "engine" of the human body, improper collection of cardiac kinetic energy will inevitably affect the function of the heart and even cause heart damage. In addition, traditional electromagnetic induction generators based on Faraday's law are large in size and complex in structure, and are not suitable for implantation in vivo.

Utility model content

In order to solve the above problems, the utility model provides a cardiac power generation system implanted in a living body, which is used for powering implanted electronic equipment, and is characterized in that it includes: a power generation main body, an adjustment terminal, an output part and a packaging layer.

Wherein, the power generation body indirectly utilizes the energy generated by the heartbeat by collecting the mechanical energy generated when the aorta expands, and converts it into electrical energy. The main body of power generation is a multi-layer film structure, including a piezoelectric material layer located in the central layer, and a first electrode layer and a second electrode layer located on both sides of the piezoelectric material layer. The encapsulation layer covers the surfaces of the power generation main body, the adjustment terminal and the output part, and the flexible polymer insulation material with good biocompatibility is used as the encapsulation material. The adjustment ends are located at both ends of the power generation body and are used to adjust the length of the power generation body. The output is used to deliver electrical energy to the implanted electronic device.

In addition, the cardiac power generation system of the present utility model may also have such a feature: wherein, the piezoelectric material layer contains nano-scale piezoelectric materials, and the nano-scale piezoelectric materials are piezoelectric crystals, piezoelectric ceramics, and organic piezoelectric polymers. any kind.

In addition, the cardiac power generation system of the present utility model may also have such a feature: wherein, the piezoelectric crystal, piezoelectric ceramic, and organic piezoelectric polymer are single-layer or multi-layer structures of nanowire arrays.

In addition, the cardiac power generation system of the present invention may also have such a feature: comprising an electric energy storage unit for storing the electric energy from the output unit.

In addition, the cardiac power generation system of the present invention may also have such a feature: wherein, the electric energy storage unit is a micro-rechargeable battery or a capacitor.

In addition, the cardiac power generation system of the present invention may also have the following feature: wherein, the output unit includes a rectification circuit and an output electrode, and the rectification circuit is connected between the electric energy storage unit and the output electrode.

In addition, the cardiac power generation system of the present invention may also have such a feature: wherein, the fixing method of the adjusting end is any one of surgical suturing, titanium clamping and adhesive bonding.

In addition, the heart power generation system of the present utility model can also have the following features: wherein, one end of the adjusting end is a single row of locking teeth, the tip of the locking teeth is smooth and faces the outside of the power generation main body, and the other end of the adjusting end is a locking groove, and the locking teeth One side of the groove has a tooth groove matching with the locking teeth, and the other side is a plane, and the locking teeth are engaged with the locking groove.

In addition, the cardiac power generation system of the present utility model may also have such a feature: wherein, the implantable electronic device is a cardiac pacemaker, a cardioverter defibrillator, a brain pacemaker, a throat pacemaker, a bladder pacemaker , any one or several of electronic cochlear, electronic retina, insulin pump, blood glucose monitor.

In addition, the cardiac power generation system of the present utility model may also have such a feature: wherein, the pressure of the cardiac power generation system on the aorta is less than 140mmHg.

Functions and Effects of Utility Models

The cardiac power generation system of the utility model indirectly utilizes the energy generated by the heartbeat by collecting the mechanical energy generated when the aorta expands, and converts it into electric energy.

Because the utility model adopts the nanoscale piezoelectric material as the main body of power generation, it can not only effectively convert the energy in the living body into electric energy, but also has a small volume, which is more suitable for implantation in the body.

Since the beating of the heart can generate stable and uninterrupted energy, after implanting the power generation system, it can continue to generate electric energy as long as the heart beats, thereby achieving continuous power supply for implanted electronic devices, eliminating the need to use batteries as power sources Necessary, it solves the problem of requiring surgery to replace the battery after the battery energy is exhausted.

Since the utility model adopts a soft annular structure to surround the outer wall of the aorta, and can quantitatively control the pressure of the system on the aorta, it can efficiently and fully collect the mechanical energy generated when the aorta expands without Significant effects on cardiac function.

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 system from the internal environment, but also effectively transmit the pressure generated by the deformation of the aortic wall to the piezoelectric material.

In addition, the tension of the cardiac power generation system surrounding the aorta can be adjusted by using the adjustment ends at both ends of the power generation main body, so that the deformation degree of the piezoelectric material and the output power can be adjusted. And because the adjustment end does not contain piezoelectric materials and electrode layers, the structure of the cardiac power generation system will not be damaged when it is fixed with surgical sutures or titanium clips.

Moreover, since the cardiac power generation system of the present invention is located outside the aorta and does not directly contact with blood, there is no risk of thrombosis and stroke (myocardial infarction or cerebral infarction).

Description of drawings

Fig. 1 is a schematic structural diagram of a cardiac power generation system in Embodiment 1 of the present utility model;

Fig. 2 is a cross-sectional view of the heart power generation system in Embodiment 1 of the present utility model;

Fig. 3 is a partial enlarged view of the region A of the cardiac power generation system of Embodiment 1 in Fig. 2;

Fig. 4 is a schematic diagram of the use state of the cardiac power generation system in Embodiment 1 of the present utility model;

Fig. 5 is a cross-sectional view of the heart power generation system surrounding the aorta in Embodiment 1 of the present utility model;

Fig. 6 is a schematic diagram of the fourth embodiment of the utility model in which the adjustment end of the cardiac power generation system is a locking tooth structure;

Fig. 7 is a circuit diagram of Embodiment 1 of the utility model.

Detailed ways

The specific embodiment of the utility model is described below in conjunction with accompanying drawing:

<Example 1>

Fig. 1 is a schematic structural view of the heart power generation system of the present invention, Fig. 2 is a cross-sectional view of the heart power generation system of the present invention, and Fig. 3 is a partial enlarged view of area A of the heart power generation system in Fig. 2 . As shown in FIG. 1 , FIG. 2 and FIG. 3 , the heart power generation system 10 includes a power generation main body 11 , an adjustment terminal 12 and an output electrode 13 . Wherein, the power generating body 11 is a multi-layer film structure, including a piezoelectric material layer 14 located in the center layer of the main body, and a first electrode layer 15 and a second electrode layer 16 respectively located on both sides of the piezoelectric material layer 14 . The encapsulation layer 17 is a biocompatible flexible polymer insulating material covering the surface of the power generation body 11 and the output electrode 13 . The encapsulation layer 17 extends to the outside of the power generation body 11 to form an adjustment terminal 12 on both sides.

The piezoelectric material layer 14 located in the center layer of the power generation body can superimpose the voltage of piezoelectric material nanowire monomers through a large-scale parallel design, thereby further increasing the output voltage. The first electrode layer 15 and the second electrode layer 16 are made of thin-layer materials with high conductivity such as gold or silver, and are connected to the piezoelectric material layer 14 .

The power generating body 11 is a curved ring structure in a natural state, and its thin film structure has good elasticity, so it can wrap around the aorta softly.

When implanted in the body, the cardiac power generation system 10 can be implanted around the aorta 43 and surround the aorta by surgical methods. Then, by adjusting the adjusting end 12, the power generating body 11 is closely attached to the outer wall of the aorta, so as to collect the energy generated by the deformation of the aorta.

Excessive compression of the aorta may increase the workload of the heart. Therefore, a pressure sensor can be temporarily placed between the main body of the power generator and the wall of the aorta to measure the pressure of the heart power generation system 10 on the aorta to avoid adverse effects on the heart.

Since the inside of the adjustment end 12 does not contain piezoelectric material layers and electrode layers, when the two sides of the adjustment end 12 are closed with surgical sutures or titanium clips, no damage will be caused to the power generation body 11 .

Fig. 4 is a schematic diagram of the use state of the present invention, and Fig. 5 is a cross-sectional view of the cardiac power generation system 10 of the present invention surrounding the aorta.

Below in conjunction with accompanying drawing 4,5 illustrate the course of work of the present utility model. As shown in FIGS. 4 and 5 , the heart generator system 10 surrounds the aorta 43 . When the heart 41 contracts, the impact of the blood flow causes the aorta 43 to expand. As shown in FIG. The terminal forms a potential difference and generates a current, which is conducted to the output electrode 13 through the first electrode layer 15 and the second electrode layer 16 , and then enters the electric energy storage unit 42 after passing through the rectifier circuit 18 .

Fig. 7 is a circuit diagram of Embodiment 1 of the utility model. As shown in Figure 7, the power generation main body 11 is connected with the rectification and filtering circuit 18, and the electric energy generated by the power generation main body 11 charges the electric energy storage unit 42 after passing through the rectification and filtering circuit 18, and the electric energy storage unit 42 can be used for electrical appliances, that is, various plants Built-in electronic equipment to provide power. Implantable electronic devices can be any of cardiac pacemakers, cardioverter defibrillators, brain pacemakers, laryngeal pacemakers, bladder pacemakers, cochlear implants, electronic retinas, insulin pumps, and blood glucose monitors one or several.

<Example 2>

In this embodiment, the shape of the power generating body and the arrangement of the adjusting end are the same as in Embodiment 1, the difference is that in this embodiment, the power generating layer of the center layer of the main body is made of nanoscale piezoelectric ceramic material.

During the implantation process, a pressure sensor is placed between the power generating body 11 and the aortic wall to detect the real-time pressure, so as to ensure that the pressure of the power generating body 11 on the aortic wall is less than 140mmHg.

Another difference is that in this embodiment, the adjusting end 12 is fixed by a titanium clip.

<Example Three>

In this embodiment, the shape of the power generating body and the setting of the adjustment end are the same as in Embodiment 1, the difference is that in this embodiment, the piezoelectric material layer of the central layer of the main body is made of piezoelectric polymer, and the adjustment end is made of adhesive Fix by gluing.

<Example 4>

In this embodiment, the shape of the power generating body and the setting of the adjustment end are the same as those in Embodiment 1, the difference is that in this embodiment, the adjustment end adopts the structure of a locking tooth, as shown in Figure 6, one end of the adjustment end 23 is a single The tooth tip of the row of teeth is smooth and faces the outside of the main body of the power generator. The other end of the adjustment end 23 is a groove. One side of the groove has a groove matching the teeth, and the other side is a plane. When implanting, slowly insert the teeth into the slot, and at the same time use the pressure sensor to detect the pressure of the main body on the aortic wall, and slowly tighten the teeth until the pressure reaches 120mmHg to 140mmHg.

Of course, the cardiac power generation system of the present invention is not limited to the designs described in the above embodiments, and its piezoelectric material layer, electrode layer and packaging layer can be made of various existing suitable materials. The cardiac power generation system of the present utility model can be used not only in the human body but also in mammals to provide electric energy for electronic devices implanted in mammals.

Claims (9)

1. A cardiac power generation system implantable in a living body, characterized in that it comprises: The main body of power generation, the adjustment terminal, the output part and the packaging layer, Wherein, the power generating body is used to surround the aorta to indirectly collect the mechanical energy generated by the beating heart and convert it into electrical energy. The power generating body is a multi-layer film structure, including a piezoelectric material layer located in the central layer, and a first electrode layer and a second electrode layer respectively located on both sides of the piezoelectric material layer; The adjustment end is located at both ends of the power generation body, and is used to adjust the length of the power generation body; the output portion is configured to deliver the electrical energy to an implantable electronic device; The encapsulation layer covers the surfaces of the generating body, the regulating end and the output part. 2. The cardiac power generation system as claimed in claim 1, characterized in that: Wherein, the output part includes a rectification filter circuit and an output electrode, and the rectification filter circuit is connected between the electric energy storage part and the output electrode. 3. The cardiac power generation system as claimed in claim 1, further comprising: The electric energy storage part is connected with the output part and is used for storing electric energy from the output electrode. 4. The cardiac power generation system as claimed in claim 4, characterized in that: Wherein, the electric energy storage part is a micro-rechargeable battery or a capacitor. 5. The cardiac power generation system as claimed in claim 1, characterized in that: Wherein, the fixing method of the adjusting end is any one of surgical suturing, titanium clip clamping and adhesive bonding. 6. The cardiac power generation system as claimed in claim 1, characterized in that: Wherein, one end of the adjusting end is a single row of locking teeth, the tip of the locking teeth is smooth and faces the outside of the power generation body, the other end of the adjusting end is a locking groove, and the inner side of the locking groove has a groove corresponding to the locking teeth. The other side of the matching tooth groove is a plane, and the locking teeth are engaged with the locking grooves. 7. The cardiac power generation system as claimed in claim 1, characterized in that: Wherein, the encapsulation layer uses a flexible polymer insulation material with good biocompatibility as the encapsulation material. 8. The cardiac power generation system as claimed in claim 1, characterized in that: Wherein, the implanted electronic device is a cardiac pacemaker, a cardioverter defibrillator, a brain pacemaker, a throat pacemaker, a bladder pacemaker, an electronic cochlear, an electronic retina, an insulin pump, and a blood glucose monitor. any one or more of them. 9. The cardiac power generation system as claimed in claim 1, characterized in that: Wherein, the pressure of the cardiac power generation system on the aorta is less than 140mmHg.