CN108379740A - A kind of self energizing device and its installation method - Google Patents

Abstract

The invention discloses a self-powered device and an installation method thereof, which comprises a sequentially connected end cover, a first elastic connector, an outer blade, a second elastic connector, an inner blade, a third elastic connector, and a receiver. Both the outer blade and the inner blade have piezoelectric materials, and the number of them is the same and greater than or equal to 2. There is an elastic member connected between the receiver and the end cover. When the self-powered device is in a natural state, the outer blades are distributed around the end cover in an umbrella shape. , the inner blade is located on the inner side of the outer blade, and the second and third elastic connectors are external insulated conductors capable of transferring electric energy generated in the outer blade and the inner blade. The self-powered device of the present invention generates electrical energy by releasing the leaves with piezoelectric material following the contraction of the heart, which can provide a steady stream of electrical energy for devices implanted in the body, reducing the battery replacement cycle or maintenance cycle of the implanted device.

Description

Self-powered device and installation method thereof

technical field

The invention relates to the technical field of energy collection, in particular to a self-powered device and an installation method thereof.

Background technique

With the development of medical technology, the ways of implanting devices in the heart cavity to treat heart diseases are increasing year by year. The size of the implanted device is strictly controlled, so the battery capacity of the implanted device is often limited. When the energy in the battery is exhausted, it is necessary to perform another operation, replace the battery or replace the implanted device, which not only increases the patient's The economic burden is increased, and the re-operation brings great challenges to the patient's psychology and body. Therefore, how to prolong the power maintenance time of the implanted device in the body and reduce the battery replacement cycle of the implanted device has become an urgent problem to be solved.

Contents of the invention

In order to solve the problems existing in the prior art, the present invention provides a self-powered device, and the specific technical solution is as follows.

A self-powered device, which includes an end cover, an outer blade, an inner blade, a first elastic connector, a second elastic connector, a third elastic connector, an elastic member and a current collector, and the outer blade and the inner blade are both It has a piezoelectric material, the number of the outer blades and the inner blades is the same and greater than or equal to 2, one end of the outer blades is connected to the end cover through the first elastic connector, and the other end of the outer blades One end is connected to one end of the inner blade through the second elastic connecting member, the other end of the inner blade is connected to the receiver through the third elastic member, and the receiver is connected to the end cover. The elastic member is connected, and when the self-powered device is in a natural state, the outer blades are distributed in an umbrella shape around the end cover and the elastic member, the inner blades are located on the inner side of the outer blades, and the receiver Located on the inner side of the inner blade, the other end of the inner blade is closer to the end cover than the one end of the inner blade, and the second elastic connector and the third elastic connector are both externally insulated conductor.

The present invention connects the end cover, the outer blade, the inner blade and the current collector through a plurality of elastic parts (the first elastic connector, the second elastic connector, the third elastic connector, and the elastic member), and in the natural state ( is not affected by external force), the inner blades are located inside the outer blades, and the receiver is located in the inner The inner side of the blade provides better protection for the receiver and avoids excessive contact between the receiver and the inner cavity of the heart; the outer blade with piezoelectric material has a large contact area with the inner wall of the heart, which can accurately synchronize the contraction and release of the heart , when the heart contracts, the outer leaflets are squeezed, and the outer leaflets squeeze the inner leaflets on the inner side at the same time, both the squeezed outer leaflets and the inner leaflets produce electrical energy, and the electrical energy passes through the second elastic connector and the third elastic connector Transferred to the receptor, as the heart contracts and releases, the self-powered device continuously converts mechanical energy into electrical energy for use and/or storage by the receptor.

Further, both the outer blade and the inner blade include piezoelectric material layers and elastic skeleton layers arranged alternately, wherein the outermost layer is the elastic skeleton layer. The piezoelectric material layer is used to convert the mechanical energy generated when the ventricular contraction is released into electrical energy, while the elastic skeleton layer provides the necessary flexible structural support for the piezoelectric material layer.

Further, medical glue is provided on the outer surface of the outer blade, and the outside of the medical glue is covered with a layer of isolation film. The isolation film is to protect the adhesion of the medical adhesive. When the self-powered device is implanted in the body, it prevents blood from coming into contact with the medical adhesive. inner cavity of the heart. At the same time, due to the prolongation of the implantation time, the medical glue will be slowly decomposed by the cells. After the medical glue is decomposed, the elastic skeleton layer is in contact with the inner cavity of the heart. Due to the strong biocompatibility of the superelastic skeleton, the endothelium of the inner cavity of the heart Cells grow to cover the hyperelastic skeleton for permanent fixation.

Further, one end of the isolation film close to the end cap is provided with a pulling wire for peeling off the isolation film. When the self-powered device is at the position to be installed, the pulling wire can be pulled outside the body to peel off the isolation membrane from the surface of the blade, which is simple to operate and does not require additional tools or surgical operations to peel off the isolation membrane.

Further, preferably, the electrical receiver is a cardiac pacemaker and/or a storage battery. With the release of ventricular contraction, the outer blade and inner blade continuously generate electrical energy and transmit it to the pacemaker, which greatly prolongs the power maintenance time of the pacemaker and reduces the replacement and maintenance cycle of the pacemaker. Preferably, the receiver may also be other implanted medical equipment, such as a defibrillator. Preferably, the electrical receiver is a storage battery, which can provide electric energy for other implanted medical devices.

Further, the elastic member is an externally insulated conductor, and the end cap is also provided with an electrode head, and the pulse current generated in the pacemaker is transmitted to the electrode head through the elastic member. The electrode tip then delivers pulses of current to the cells in the treatment area to stimulate the cells.

Further, the first elastic connecting piece, the second elastic connecting piece, the third elastic connecting piece, and the elastic piece all contain superelastic materials. A superelastic material may be a superelastic alloy, which has an extremely wide range of elasticity and has the property of returning to its original shape even when deformed. Hyperelasticity: It refers to the phenomenon that the sample produces a strain far greater than its elastic limit strain under the action of an external force, and the strain can automatically recover when unloading. The superelastic component may be fabricated from Nitinol or any other suitable superelastic material. In nickel-titanium alloys, for example, it results from a phase transition of the alloy's crystal structure between the austenite and martensite phases, capable of withstanding deformation strains up to about 13% (but not limited to), And the material is able to return to its original shape after the stress is removed without heating or cooling.

Further, the outer blade has an arc shape, and the inner blade has an arc shape matched with the outer blade, and when the outer blade is under pressure, the outer blade and the inner blade can be attached to each other. The curved outer blades can increase the contact area between the outer blades and the inner wall of the heart, which improves the fixing effect on the one hand and facilitates the synchronous movement of the outer blades and the inner wall of the heart on the other hand.

The installation method of the self-powered device of the present invention mainly includes the following steps:

1) Adjust the posture of the self-powered device to a stretched state. When the self-powered device is in a stretched state, the elastic member is stretched, and the end cap and the receiver are respectively located on the sides of the self-powered device. At both ends, the maximum diameter of the outer contour formed by the outer blades in the stretched state is smaller than the maximum diameter of the outer contour formed by the outer blades in the natural state;

2) placing the self-powered device in a stretched state into a catheter, and releasing the self-powered device into the inner cavity of the heart through the catheter;

3) Under the joint action of the elastic member, the first elastic connector, the second elastic connector, and the third elastic connector, the length of the elastic member keeps decreasing, and the outer blades gradually open in an umbrella shape. The blades are gradually folded inwards of the outer blades until the self-powered device returns to its natural state;

4) Adjust the position of the self-powered device, and use the medical glue on the outer blade to fix the self-powered device at a designated position in the inner cavity of the heart.

Further, the elastic member is an externally insulated conductor, the end cap is also provided with an electrode tip, the electrical receiver is a pacemaker, and the pulse current generated in the pacemaker is transmitted to the The electrode head; the outer surface of the outer blade is also provided with medical glue, the outside of the medical glue is covered with a layer of isolation film, and the end of the isolation film near the end cap is provided with a device for peeling off the isolation film. For the pulling wire, the step 4) further includes the following steps: pulling the pulling wire at the outer end of the catheter, pulling the pulling wire out of the catheter to peel off the isolation film from the surface of the outer blade, exposing the medical glue.

Due to the adoption of the above technical solution, the self-powered device of the present invention generates electric energy through the release of the leaves with piezoelectric material following the contraction of the heart, which can provide a steady stream of electric energy for the device implanted in the body and reduce the battery replacement cycle of the implanted device Or maintenance cycle; the advantage of the sheet piezoelectric material is that it has a large contact area with the inner wall of the heart, can accurately synchronize the contraction of the heart, and efficiently convert the mechanical energy of the heart into electrical energy; the size of the self-powered device of the present invention can be adjusted, and the outer contour The size of the energy supply device can be adjusted, which is very beneficial for the implantation of the energy supply device of the present invention. The energy supply device can be placed in a catheter with a small size when the outer contour is small, and the functional device can be implanted by minimally invasive surgery. In the body, the functional devices are automatically released in the body, and the blades with piezoelectric materials are deployed to achieve the best energy conversion effect.

Description of drawings

Fig. 1 is a perspective view of the self-powered device of the present invention in a natural state;

Figure 2 is a schematic diagram of a blade with a piezoelectric material according to the present invention;

3 is a perspective view of the self-powered device of the present invention in a stretched state;

Fig. 4 is a schematic diagram of the self-powered device in the stretched state of the present invention located in the catheter;

Fig. 5 is a perspective view of a certain moment in the transition process of the self-powered device of the present invention from a stretched state to a natural state.

In the figure: end cover 1, outer blade 2, inner blade 3, first elastic connector 4, second elastic connector 5, third elastic connector 6, elastic member 7, current collector 8, piezoelectric material layer 9, Elastic skeleton layer 10 , catheter 11 , isolation membrane 12 , pulling wire 13 , and electrode tip 14 .

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings.

Referring to Figures 1-5, a self-powered device includes an end cover 1, an outer blade 2, an inner blade 3, a first elastic connector 4, a second elastic connector 5, a third elastic connector 6, an elastic 7 and a current collector 8, the outer blades 2 and the inner blades 3 both have piezoelectric materials, and the number of the outer blades 2 and the inner blades 3 is the same and greater than or equal to 2, although the figure shows 3 outer blades In the case of blades, as long as the number of outer blades is greater than or equal to 2, one end of the outer blade 2 is connected to the end cover 1 through the first elastic connector 4, and the other end of the outer blade 2 is connected through the The second elastic connector 5 is connected to one end of the inner blade 3, and the other end of the inner blade 3 is connected to the receiver 8 through the third elastic connector 6, and the receiver 8 is connected to the receiver 8. The elastic member 7 is connected between the end caps 1. When the self-powered device is in a natural state, the outer blades 2 are distributed in an umbrella shape around the end cap 1 and the elastic member 7. The inner blades 3 are located at The inside of the outer blade 2, the current collector 8 is located inside the inner blade 3, the other end of the inner blade 3 is closer to the end cover 1 than the one end of the inner blade 3, Both the second elastic connector 5 and the third elastic connector 6 are externally insulated conductors capable of transmitting the electric energy generated in the external blades and the internal blades.

The present invention connects the end cover, the outer blade, the inner blade and the current collector through a plurality of elastic parts (the first elastic connector, the second elastic connector, the third elastic connector, and the elastic member), and in the natural state ( is not affected by external force), the inner blades are located inside the outer blades, and the receiver is located in the inner The inner side of the blade provides better protection for the receiver and avoids excessive contact between the receiver and the inner cavity of the heart; the outer blade with piezoelectric material has a large contact area with the inner wall of the heart, which can accurately synchronize the contraction and release of the heart , when the heart contracts, the outer leaflets are squeezed, and the outer leaflets squeeze the inner leaflets on the inner side at the same time, both the squeezed outer leaflets and the inner leaflets produce electrical energy, and the electrical energy passes through the second elastic connector and the third elastic connector Transferred to the receptor, as the heart contracts and releases, the self-powered device continuously converts mechanical energy into electrical energy for use and/or storage by the receptor. Wherein the elastic member 7 is preferably a helical spring. In addition, Fig. 1 shows a self-powered device in a natural state, wherein a part of the outer blade 2 and a part of the inner blade 3 overlap together, so that the slight extrusion deformation of the outer blade 2 can also be transmitted to the inner blade 3, The self-powered device is more sensitive to the contraction and release of the heart, which is conducive to improving the power generation efficiency of the blades; of course, the outer blades 2 and the inner blades 3 can also be set not to contact each other in a natural state, and there is a certain gap between them. Only when the outer blade is subjected to a greater compression, the outer blade 2 and the inner blade 3 are in contact with each other, and both generate electricity, and when the outer blade is subjected to a smaller compression, only the outer blade 2 generates electricity.

Further, as shown in FIG. 2 , both the outer blade 2 and the inner blade 3 include piezoelectric material layers 9 and elastic skeleton layers 10 arranged alternately, wherein the outermost layer is the elastic skeleton layer 10 . The piezoelectric material layer 9 is used to convert the mechanical energy generated when the ventricle contracts and releases into electrical energy, while the elastic skeleton layer provides the necessary flexible structural support for the piezoelectric material layer. Preferably, the elastic skeleton layer is made of superelastic material. Among them, Fig. 2(a) shows the situation of two elastic skeleton layers 10 and one piezoelectric material layer 9, and Fig. 2(b) shows two elastic skeleton layers 10 and two piezoelectric material layers 9 However, the number of elastic skeleton layers 10 and piezoelectric material layers 9 can be increased or decreased as required.

Further, as shown in FIG. 3 , medical glue is provided on the outer surface of the outer blade 2 , and the outside of the medical glue is covered with a layer of isolation film 12 . Isolation film 12 is to protect the adhesive force of medical glue, prevent blood etc. from coming into contact with medical glue when the self-powered device is implanted in the body. Paste in the inner cavity of the heart. At the same time, due to the prolongation of the implantation time, the medical glue will be slowly decomposed by the cells. After the medical glue is decomposed, the elastic skeleton layer is in contact with the inner cavity of the heart. Because the elastic skeleton has strong biocompatibility, the endothelial cells in the inner cavity of the heart It will grow and cover the elastic skeleton to achieve the effect of permanent fixation. The main component of medical glue is a-cyanoacrylate, which has a fast polymerization speed in biological tissues. Under the action of anions in wound blood and tissue fluid, medical glue can quickly polymerize and solidify to form a film and be tightly embedded with the wound, which can be firm The wound can be kept in an appropriate state, and the adhesive film can prevent blood cells and platelets from passing through. Under the combined action of thrombin and fibrinogen, the small blood vessels that seal the broken wound can effectively stop bleeding. At the same time, the adhesive film can isolate tissues and bacteria, and also It has the functions of anti-infection and wound protection, the ether chain in the polymer also has analgesic effect, and it also has the characteristics of decomposition and excretion in the body

Further, as shown in FIG. 3 , one end of the isolation membrane 12 close to the end cap 1 is provided with a pulling wire 13 for peeling off the isolation membrane 12 . When the self-powered device is at the ready-to-install position, the pulling wire 13 can be pulled outside the body to peel off the isolation membrane 12 from the surface of the outer blade. The operation is simple, and no additional tools or surgical operations are required to peel off the isolation membrane.

Further, preferably, the electrical receiver 8 is a cardiac pacemaker and/or a storage battery. With the release of ventricular contraction, the outer blade and inner blade continuously generate electrical energy and transmit it to the pacemaker, which greatly prolongs the power maintenance time of the pacemaker and reduces the replacement and maintenance cycle of the pacemaker. Preferably, the receiver may also be other implanted medical equipment, such as a defibrillator. Preferably, the electrical receiver is a storage battery, which can provide electric energy for other implanted medical devices.

Further, the elastic member 7 is an externally insulated conductor, and the end cap 1 is also provided with an electrode head 14, and the pulse current generated in the pacemaker is transmitted to the electrode head 14 through the elastic member 7 . Then the electrode head 14 transmits the pulse current to the cells in the treatment area to stimulate the cells.

Further, the first elastic connecting piece 4, the second elastic connecting piece 5, the third elastic connecting piece 6, and the elastic piece 7 all contain superelastic materials. A superelastic material may be a superelastic alloy, which has an extremely wide range of elasticity and has the property of returning to its original shape even when deformed.

Further, the outer vane 2 has an arc shape, and the inner vane 3 has an arc shape matched with the outer vane 2 , and when the outer vane 2 is under pressure, the outer vane 2 and the inner vane 3 can adhere to each other. The curved outer blades can increase the contact area between the outer blades and the inner wall of the heart, which improves the fixing effect on the one hand and facilitates the synchronous movement of the outer blades and the inner wall of the heart on the other hand.

The installation method of the self-powered device of the present invention mainly includes the following steps:

1) Adjust the posture of the self-powered device to a stretched state, as shown in Figure 3, when the self-powered device is in a stretched state, the elastic member 7 is stretched, and the electrode head 14 and the receiver 8 are respectively located at the two ends of the self-powered device, and the maximum diameter of the outer contour formed by the outer blades 2 in the stretched state is smaller than the diameter of the outer contour formed by the outer blades 2 in the natural state;

2) Put the self-powered device in the stretched state into the catheter 11 (as shown in Figure 4), and release the self-powered device to a designated position in the inner cavity of the heart through the catheter 11;

3) Under the joint action of the elastic member 7, the first elastic connecting member 4, the second elastic connecting member 5, and the third elastic connecting member 6, the self-powered device, as shown in Figure 5, the length of the elastic member 7 keeps changing Small, the outer blade 2 is gradually opened in an umbrella shape, and the inner blade 3 is gradually folded inward of the outer blade 2 until the self-powered device returns to the natural state (the state in Figure 1);

4) Adjust the position of the self-powered device so that the electrode head 14 is fixed on the myocardium, pull the pulling wire 13 at the outer end of the catheter 11, and pull the pulling wire 13 out of the catheter 11 to separate the isolation membrane 12 from the outer blade 2. The surface is peeled off, and the medical glue attached to the surface of the outer blade 2 is in contact with and adhered to the inner surface of the ventricle. The installation and fixation of the self-powered device is realized.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (10)

1. A self-powered device, characterized in that it includes an end cover, an outer blade, an inner blade, a first elastic connector, a second elastic connector, a third elastic connector, an elastic member and a current collector, the outer Both the blades and the inner blades have piezoelectric materials, the number of the outer blades and the inner blades is the same and greater than or equal to 2, and one end of the outer blades is connected to the end cover through the first elastic connector, so The other end of the outer blade is connected to one end of the inner blade through the second elastic connecting member, the other end of the inner blade is connected to the receiver through the third elastic member, and the receiver is connected to the receiver The elastic member is connected between the end caps. When the self-powered device is in a natural state, the outer blades are distributed around the end caps and elastic members in an umbrella shape, and the inner blades are located on the inner side of the outer blades. , the current collector is located inside the inner blade, the other end of the inner blade is closer to the end cover than the one end of the inner blade, the second elastic connection, the third elastic connection All parts are externally insulated conductors. 2 . The self-powered device according to claim 1 , wherein the outer blades and the inner blades each comprise piezoelectric material layers and elastic skeleton layers arranged alternately, wherein the outermost layer is an elastic skeleton layer. 3 . 3 . The self-powered device according to claim 1 , wherein medical glue is provided on the outer surface of the outer blade, and the outside of the medical glue is covered with a layer of isolation film. 4 . 4 . The self-powered device according to claim 3 , wherein a pulling wire for peeling off the isolation membrane is provided at one end of the isolation membrane close to the end cap. 5 . 5 . The self-powered device according to claim 1 , wherein the electrical receiver is a cardiac pacemaker and/or a storage battery; or the electrical receiver is a defibrillator. 6. A self-powered device according to claim 5, wherein the elastic member is an externally insulated conductor, the end cap is also provided with an electrode tip, and the pulse current generated in the pacemaker transmitted to the electrode head through the elastic member. 7 . The self-powered device according to claim 1 , wherein the first elastic connecting piece, the second elastic connecting piece, the third elastic connecting piece, and the elastic piece all contain superelastic materials. 8. A self-powered device according to claim 1, wherein the outer blades have an arc shape, the inner blades have an arc shape matching the outer blades, and when the outer blades are under pressure, The outer blades and the inner blades are capable of being attached to each other. 9. A method for installing the self-powered device according to claim 1, characterized in that it mainly comprises the following steps: 1) Adjust the posture of the self-powered device to a stretched state. When the self-powered device is in a stretched state, the elastic member is stretched, and the end cap and the receiver are respectively located on the sides of the self-powered device. At both ends, the maximum diameter of the outer contour formed by the outer blades in the stretched state is smaller than the maximum diameter of the outer contour formed by the outer blades in the natural state; 2) placing the self-powered device in a stretched state into a catheter, and releasing the self-powered device into the inner cavity of the heart through the catheter; 3) Under the joint action of the elastic member, the first elastic connector, the second elastic connector, and the third elastic connector, the length of the elastic member keeps decreasing, and the outer blades gradually open in an umbrella shape. The blades are gradually folded inwards of the outer blades until the self-powered device returns to its natural state; 4) Adjust the position of the self-powered device, and use the medical glue on the outer blade to fix the self-powered device at a designated position in the inner cavity of the heart. 10. The installation method of the self-powered device according to claim 9, wherein the elastic member is an externally insulated conductor, the end cap is also provided with an electrode tip, and the electrical receiver is a pacemaker, The pulse current generated in the pacemaker is transmitted to the electrode head through the elastic member; medical glue is also arranged on the outer surface of the outer blade, and the outside of the medical glue is covered with a layer of isolation film, the One end of the isolation membrane close to the end cap is provided with a pulling wire for peeling off the isolation membrane, and the step 4) also includes the following steps: pulling the pulling wire at the outer end of the catheter, and the pulling wire is withdrawn from the catheter The barrier film was peeled off from the surface of the outer blade, exposing the medical glue.