WO2023241182A1

WO2023241182A1 - Ultrasonic transducer for assisting in thrombolysis, and ultrasound-generating apparatus comprising same

Info

Publication number: WO2023241182A1
Application number: PCT/CN2023/087193
Authority: WO
Inventors: 姚新科; 黄定国
Original assignee: 深圳腾复医疗科技有限公司
Priority date: 2022-06-14
Filing date: 2023-04-10
Publication date: 2023-12-21

Abstract

An ultrasonic transducer (1,2,3,42) for assisting in thrombolysis, and an ultrasound-generating apparatus (4) comprising the same. The ultrasonic transducer (1, 2, 3, 42) comprises at least one ultrasound-radiating unit. The ultrasound-radiating unit comprises: an ultrasound-radiating body (11) and a power transmission piece. The power transmission piece is electrically connected to the ultrasound-radiating body (11) and is used for transmitting electric energy to the ultrasound-radiating body (11). The ultrasonic transducer (1, 2, 3, 42) comprises a plurality of ultrasound-radiating units. The plurality of ultrasound-radiating units are connected end to end by means of the power transmission pieces thereof to form a columnar ultrasound-radiating unit group. Further provided is an ultrasound-generating apparatus (4), comprising: an ultrasonic transducer (1, 2, 3, 42) and a catheter (41). The catheter (41) is used for carrying the ultrasonic transducer (1, 2, 3, 42). The ultrasonic transducer (1, 2, 3, 42) and the ultrasound-generating apparatus (4) comprising same can convert electric energy into ultrasonic energy, thereby accelerating the action of a thrombolytic drug by combining ultrasound and the thrombolytic drug, improving thrombolysis efficiency, reducing thrombolysis time, and lowering the risk of bleeding caused by the thrombolytic drug.

Description

Ultrasonic transducer for assisted thrombolysis and ultrasonic generating device containing the same

cross reference

This application cites Chinese patent application No. 202210668151.9 titled "Ultrasound transducer for assisted thrombolysis and ultrasonic generation device containing the same" submitted on June 14, 2022, which is fully incorporated into this application by reference. .

Technical field

The present application relates to the technical field of medical devices, and in particular to an ultrasonic transducer used to assist thrombolysis and an ultrasonic generating device containing the same.

Background technique

At present, thrombotic diseases have become an important disease that threatens the health and life of all mankind. In addition to genetics, the occurrence of most thrombotic diseases is related to people's bad lifestyle and habits. Among thrombotic diseases, including ischemic cerebrovascular disease, myocardial infarction, pulmonary embolism, and various arteriovenous thrombosis caused by surgery or trauma, they have a high incidence rate and high mortality and disability rates. At present, the treatment and prevention of thrombotic diseases are mainly based on anticoagulation and thrombolytic therapy. Thrombolytic therapy mainly includes systemic thrombolytic therapy and catheter contact thrombolysis. Among them, systemic thrombolytic treatment has the risk of causing cerebral hemorrhage or systemic hemorrhage; although catheter-contact thrombolysis reduces the dosage of thrombolytic drugs, the thrombolytic efficiency of thrombolytic drugs is still not ideal and the thrombolysis time is long. , and long-term catheter thrombolysis also carries the risk of infection.

Therefore, improving thrombolytic efficiency and shortening thrombolytic treatment time are crucial for thrombolytic treatment.

It should be noted that the information disclosed in the above background section is only used to enhance understanding of the background of the present application, and therefore may include information that does not constitute prior art known to those of ordinary skill in the art.

Contents of the invention

The purpose of some embodiments of the present application is to provide an ultrasonic transducer for assisting thrombolysis and an ultrasonic generating device containing the same, which can convert electrical energy into ultrasonic energy, thereby accelerating the action of thrombolytic drugs through the combination of ultrasonic waves and thrombolytic drugs. , improve thrombolysis efficiency and shorten thrombolysis time.

The embodiment of the present application provides an ultrasonic transducer for assisting thrombolysis. The ultrasonic transducer includes at least one ultrasonic radiating unit; the ultrasonic radiating unit includes:

an ultrasonic radiator; and a power transmission component, which is electrically connected to the ultrasonic radiator and used to transmit electrical energy to the ultrasonic radiator.

For example, the ultrasonic radiator is in the form of a hollow cylinder; the outer wall and the inner wall of the hollow cylinder are used for the first electrode and the second electrode respectively.

For example, the power transmission member includes a first wire and a second wire electrically connected to the first electrode and the second electrode respectively; there are multiple ultrasonic radiating units, and the multiple ultrasonic radiating units have the same structure; A plurality of the ultrasonic radiating units are connected end-to-end through the first wire and the second wire to form a row-type ultrasonic radiating unit group.

For example, the ultrasonic radiator includes: two radiating plate bodies and a common electrode plate; the common electrode plate is disposed between the two radiating plate bodies and is electrically connected to the two radiating plate bodies.

For example, the common electrode plate is in the shape of a flat plate, and the two radiating plate bodies are respectively attached and fixed to each other. on both sides of the common electrode plate.

For example, the two radiating plate bodies are identical and rectangular, and the thickness of the two radiating plate bodies is greater than the thickness of the common electrode plate.

For example, the power transmission component includes two electrode wires electrically connected to the two radiation plate bodies respectively and an electrode connecting plate extending from the common electrode plate; there are multiple ultrasonic radiating units, and the plurality of ultrasonic radiating units are The structures of the ultrasonic radiating units are the same, and a plurality of the ultrasonic radiating units are connected end to end through the electrode wires and electrode connecting plates to form a row-type ultrasonic radiating unit group.

For example, the common electrode plate and the electrode connecting plate of the row-type ultrasonic radiation unit group are integrated.

For example, the common electrode plate includes: a plate body; two support parts are respectively protruded from both ends of the side of the plate body facing any of the radiation plate bodies, and a vibration groove is formed between the two support parts. The supporting surfaces of the two supporting parts are connected to the radiating panel body.

For example, the power transmission component includes: two electrode wires electrically connected to the two radiation plate bodies respectively and a common electrode wire connected to the common electrode plate; there are multiple ultrasonic radiating units, and multiple ultrasonic wave The radiation units have the same structure, and the plurality of ultrasonic radiation units are connected end to end through the electrode wires and the common electrode wires to form a column-type ultrasonic radiation unit group.

For example, there are multiple ultrasonic radiating units, and the plurality of ultrasonic radiating units are connected end to end through the power transmission component to form a row-type ultrasonic radiating unit group.

Embodiments of the present application also provide an ultrasonic generating device for assisting thrombolysis, including: an ultrasonic transducer and a catheter for assisting thrombolysis as described above; the catheter is used to load the ultrasonic transducer device.

For example, the ultrasonic generating device further includes an insulating structure, the insulating structure is an insulating layer that fills and wraps the ultrasonic transducer, or the conduit doubles as an insulating structure of the ultrasonic transducer.

For example, the ultrasonic wave generating device further includes: a power module, the power module is electrically connected to the ultrasonic transducer.

For example, the ultrasonic wave generating device further includes: a reinforcing member disposed in the conduit and used to enhance the axial strength of the ultrasonic transducer.

For example, when the ultrasonic radiator of the ultrasonic transducer is a hollow cylinder, the reinforcing member is a reinforcing tube coaxially disposed within the ultrasonic radiator.

It can be seen from the above technical solutions that this application has at least the following advantages and positive effects:

The ultrasonic transducer and ultrasonic generating device used to assist thrombolysis in the embodiment of the present invention transmit electric energy to the ultrasonic radiator through the power transmission part, and convert the electric energy into ultrasonic energy through the ultrasonic radiator and radiate ultrasonic waves, so that the ultrasonic waves can be used in blood tissue It spreads internally, accelerates the penetration of thrombolytic drugs into the interior of the thrombus, increases the interaction area between the drug and the thrombus, enhances the binding ability of the thrombolytic drugs to fibrin, and assists the thrombolytic drugs in cutting off the molecular connections within the thrombus fibers, thus accelerating the degradation of the fibrin matrix. , shorten the vascular recanalization time and improve the success rate of thrombolysis; at the same time, it can also reduce the dosage of thrombolytic drugs, thereby reducing the risk of bleeding caused by thrombolytic drugs.

Description of the drawings

One or more embodiments are exemplified by the pictures in the corresponding drawings. These illustrative illustrations do not constitute limitations to the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings are not intended to be limited to scale.

Figure 1 is a schematic structural diagram of an ultrasonic radiation unit of an ultrasonic transducer for assisting thrombolysis provided in Embodiment 1 of the present invention;

Figure 2 is a schematic structural diagram of an ultrasonic transducer for assisting thrombolysis provided in Embodiment 1 of the present invention. picture;

Figure 3 is a schematic structural diagram of an ultrasonic radiation unit of an ultrasonic transducer for assisting thrombolysis provided in Embodiment 2 of the present invention;

Figure 4 is a schematic structural diagram of a radiation plate body of an ultrasonic transducer for assisting thrombolysis provided in Embodiment 2 of the present invention;

Figure 5 is a schematic structural diagram of a common electrode plate of an ultrasonic transducer for assisting thrombolysis provided in Embodiment 2 of the present invention;

Figure 6 is a schematic structural diagram of an ultrasonic transducer for assisting thrombolysis provided in Embodiment 2 of the present invention;

Figure 7 is a schematic structural diagram of an ultrasonic radiation unit of an ultrasonic transducer for assisting thrombolysis provided in Embodiment 3 of the present invention;

Figure 8 is a schematic structural diagram of a radiation plate body of an ultrasonic transducer for assisting thrombolysis provided in Embodiment 3 of the present invention;

Figure 9 is a schematic structural diagram of a common electrode plate of an ultrasonic transducer for assisting thrombolysis provided in Embodiment 3 of the present invention;

Figure 10 is a schematic structural diagram of an ultrasonic transducer for assisting thrombolysis provided in Embodiment 3 of the present invention;

Figure 11 is a schematic structural diagram of an ultrasonic generating device for assisting thrombolysis provided in Embodiment 4 of the present invention;

Figure 12 is a schematic cross-sectional structural diagram at A-A in Figure 11;

Figure 13 is a schematic cross-sectional structural diagram of the ultrasonic transducer and insulation structure;

Figure 14 is a schematic diagram of another cross-sectional structure at AA in Figure 11.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present application more clear, some embodiments of the present application are further described in detail below in conjunction with the drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present application and are not used to limit the present application.

In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the purpose of To facilitate the description of the present invention and to simplify the description, it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be construed as a limitation of the present invention. Furthermore, the terms "first," "second," "third," etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

It should be noted that, unless otherwise clearly stated, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, It can also be connected indirectly through an intermediary, which can be an internal connection between two components.

In the description of the present invention, it should be noted that in the field of interventional medical devices, the proximal end refers to the end closer to the operator, and the distal end refers to the end farther from the operator; the axial direction refers to the end parallel to the natural direction. The direction of the line connecting the distal center and the proximal center of the medical device in the state. The above definitions are only for convenience of expression and shall not be construed as limitations of the present invention.

Embodiment 1

Referring to Figure 1, an embodiment of the present invention provides an ultrasonic transducer for assisting thrombolysis, which can be used in conjunction with thrombolytic drugs to radiate ultrasonic energy during thrombolysis, and can accelerate ultrasonic waves when they propagate in blood tissues. Thrombolytic drugs penetrate into the thrombus, increase the interaction area between the drug and the thrombus, and enhance the thrombolytic drugs. The binding ability of the substance to fibrin and the auxiliary thrombolytic drugs can cut off the molecular connections within the thrombus fibers, thereby accelerating the degradation of the fibrin matrix, shortening the vascular recanalization time, and improving the success rate of thrombolysis; it can also reduce the use of thrombolytic drugs. dose, thereby reducing the risk of bleeding caused by thrombolytic drugs. The ultrasonic transducer used to assist thrombolysis in this embodiment includes at least an ultrasonic radiating unit. The ultrasonic radiating unit includes: an ultrasonic radiator and a power transmission component. The power transmission component is electrically connected to the ultrasonic radiator and is used to transmit electrical energy to the ultrasonic radiator.

As a component that converts electrical energy into ultrasonic mechanical energy and radiates it, the ultrasonic radiator can be made of piezoelectric materials with piezoelectric effect, including but not limited to: lead zirconate titanate (PZT for short), barium titanate, lead titanate , lead metaniobate and other piezoelectric materials. Lead zirconate titanate is a solid solution of PbTiO3 and PbZrO3, which is especially suitable for making piezoelectric devices.

The power transmission parts can be wires, metal sheets and other structures suitable for conducting electricity. The power transmission component is connected to an external power supply and applies an alternating current signal with a frequency above 20KHz to the ultrasonic radiator, causing the ultrasonic radiator to generate ultrasonic vibration and emit ultrasonic energy to the surroundings.

The ultrasonic transducer may include a plurality of ultrasonic radiating units, and the plurality of ultrasonic radiating units are connected end to end through power transmission parts to form a row-type ultrasonic radiating unit group. The radiation range of a single ultrasonic radiating unit is limited and cannot meet the needs of use in a long thrombolysis section. By combining multiple ultrasonic radiating units into an ultrasonic radiating unit group, the length of the ultrasonic transducer can be increased, so that the length of the ultrasonic transducer can be increased according to the thrombolysis length. Ultrasonic transducers of different lengths are required. It can be understood that the structures of the ultrasonic radiators of multiple ultrasonic radiating units may be the same or different, and are not specifically limited here.

Referring to FIG. 1 , the ultrasonic radiator 11 is in the form of a hollow cylinder. The outer wall of the hollow cylinder is used for the first electrode 111 , and the inner wall of the hollow cylinder is used for the second electrode 112 . The power transmission member includes a first conductor 12 electrically connected to the first electrode 111 and a second conductor 13 electrically connected to the second electrode 112 .

An alternating current signal with a frequency above 20 KHz is applied to the ultrasonic radiator 11 through the first wire 12 and the second wire 13, so that the outer wall (that is, the first electrode 111) as the ultrasonic radiation surface outputs ultrasonic vibrations outward.

The ultrasonic radiator 11 with a hollow cylindrical structure can emit ultrasonic waves in a radially outward radiation mode, so that it can act on the thrombus from all directions inside the blood vessel.

The ultrasonic transducer 1 for assisting thrombolysis in this embodiment includes multiple ultrasonic radiating units, and the multiple ultrasonic radiating units have the same structure. A plurality of ultrasonic radiating units are connected end to end through the first wire 12 and the second wire 13 to form a row-type ultrasonic radiating unit group.

According to the length of the affected part of the blood vessel, multiple ultrasonic radiating units can be connected in series to form an ultrasonic transducer group. The ultrasonic transducer 1 includes n ultrasonic radiating units. The first electrode 111 of the ultrasonic radiating body 11 of the first ultrasonic radiating unit The first electrodes 111 of the second, third,...n ultrasonic radiators 11 are connected in sequence through the first wires 12. Similarly, the second electrodes 112 of the first ultrasonic radiator 11 are connected to the second, third,...nth ultrasonic radiators 11. The second electrodes 113 of the n ultrasonic radiators 11 are connected in sequence through the second wires 13 . Referring to FIG. 2 , the ultrasonic transducer 1 includes three ultrasonic radiating units connected end to end through a first wire 12 and a second wire 13 to form a row-type ultrasonic radiating unit group. It can be understood that the number of ultrasonic radiating units can be determined according to the thrombolysis length and the length of a single ultrasonic radiating unit, and can be more, such as 9, etc., and is not specifically limited here.

Embodiment 2

The main difference between the ultrasonic transducer for assisting thrombolysis provided in the second embodiment of the present invention and the ultrasonic transducer of the first embodiment is that the specific structures of the ultrasonic radiator and the power transmission component are different. The details will not be repeated here.

Referring to Figures 3 to 6, the ultrasonic radiation of the ultrasonic transducer for assisting thrombolysis in this embodiment The radiator includes: two radiating plates 21 and a common electrode plate 231 . The common electrode plate 231 is disposed between the two radiating plate bodies 21 and is electrically connected to the two radiating plate bodies 21 . The two radiating plates 21 are respectively used to convert electrical energy into ultrasonic vibration energy and emit ultrasonic energy. The radiation plate body 21 is made of piezoelectric material. The two radiating plates 21 may have the same structure, for example, the two radiating plates 21 may have the same shape and size. For example, the two radiation plate bodies 21 may both be rectangular. Each radiation plate body 21 includes a first end surface 211 and a second end surface 212 . The first end face 211 and the second end face 212 are both rectangular planes. The first end face 211 or the second end face 212 is closely connected to the common electrode plate 231, and the free first end face or the second end face is used to output ultrasonic vibration energy. The two radiating plate bodies 21 are arranged symmetrically with respect to the common electrode plate 231. Therefore, the ultrasonic radiator of this embodiment emits ultrasonic waves outward through the two symmetrical radiating surfaces during operation.

The common electrode plate 231 is in the shape of a flat plate. The common electrode plate 231 is a metal electrode, which can be made of a metal material with good conductivity. The common electrode plate 231 serves as the ground electrode of the two radiating plate bodies 21 . The two radiation plate bodies 21 are respectively attached and fixed on both sides of the common electrode plate 231 . The common electrode plate 231 and the radiation plate body 21 can be connected using conductive glue, which is not specifically limited here.

The power transmission component may include two electrode wires 22 electrically connected to the two radiation plate bodies 21 respectively and an electrode connection plate 232 formed by extending from the common electrode plate 231 . The radiating surface of the radiating plate body 21 serves as its other electrode and is connected to the electrode wire 22 . The electrode wire 22 extends in a direction parallel to the radiating plate body 21 . The electrode connection plate 232 is used to connect to an external power supply or to the common electrode plates 231 of other ultrasonic radiation units. The common electrode plate 231 and the electrode connection plate 232 are one piece and are used for the common electrode 230 of the ultrasonic radiation unit. It can be understood that the electrode connecting plate 232 can also be replaced by wires.

Optionally, the thickness of the two radiation plate bodies 21 is greater than the thickness of the common electrode plate 231, so that the ultrasonic radiator has better radiation performance.

The ultrasonic transducer 2 of this embodiment may also include multiple ultrasonic radiating units. The structures of the multiple ultrasonic radiating units may be the same, and the multiple ultrasonic radiating units are connected end to end through the electrode wires 22 and the electrode connecting plates to form a column-type ultrasonic radiating unit group. Among them, the common electrode plate 231 and the electrode connecting plate 232 of the column-type ultrasonic radiating unit group can be an integrated piece, that is, the common electrodes 230 of multiple ultrasonic radiating units are integrated and used for one electrode 23 of the ultrasonic transducer 2 .

Specifically, the ultrasonic transducer 2 includes n ultrasonic radiating units. The ultrasonic radiator of the first ultrasonic radiating unit is connected to the second, third, ... The common electrode of the ultrasonic radiation unit. Please refer to Figure 6. The ultrasonic transducer 2 includes a column-type ultrasonic radiating unit group consisting of three ultrasonic radiating units connected end to end.

Embodiment 3

The main difference between the ultrasonic transducer for assisting thrombolysis provided in the third embodiment of the present invention and the ultrasonic transducer of the second embodiment is that the structure of the common electrode plate of the ultrasonic radiator is different. The details will not be repeated here.

Referring to FIGS. 7 to 10 , the ultrasonic radiator of the ultrasonic transducer includes: two radiating plates 31 and a common electrode plate 32 . The common electrode plate 32 is disposed between the two radiating plate bodies 31 and is electrically connected to the two radiating plate bodies 31 . The two radiating plates 31 are respectively used to convert electrical energy into ultrasonic vibration energy and emit ultrasonic energy. The radiation plate body 31 is made of piezoelectric material. The two radiating plate bodies 31 may have the same shape and size. The two radiation plate bodies 31 may both be rectangular.

Each radiating plate body 31 includes a first end surface 311 and a second end surface 312 . The first end surface 311 and the second end surface 312 are both rectangular planes, and the first end surface 311 or the second end surface 312 is connected to the common electrode plate 32 .

The common electrode plate 32 includes: a plate body 321 . The side of the plate body 321 facing any radiation plate body 31 Two supporting portions 322 are respectively protruded from both ends. A vibration groove 323 is formed between the two supporting portions 322 . The supporting surfaces of the two supporting portions 322 are connected to the radiation plate body 31 . The radiating plate body 31 is supported by the two supporting parts 322 and the vibration groove 323 serves as a gap between the radiating plate body 31 and the common electrode plate 32, so that each radiating plate body 31 can vibrate as a whole and output ultrasonic vibration, thereby being able to emit stronger of ultrasound.

The power transmission component includes: two electrode wires 33 electrically connected to the two radiation plate bodies 31 respectively, and a common electrode wire 34 connected to the common electrode plate 32 . The radiation surface of the radiation plate body 31 away from the common electrode plate 32 serves as its other electrode and is connected to the electrode wire 33 . The electrode wire 33 extends in a direction parallel to the radiation plate body 31 .

The ultrasonic transducer 3 of this embodiment may also include multiple ultrasonic radiating units. The structures of multiple ultrasonic radiating units may be the same, and the multiple ultrasonic radiating units are connected end to end through electrode wires 33 and common electrode wires 34 to form a row-type ultrasonic radiating unit group. Specifically, if the ultrasonic transducer 3 includes n ultrasonic radiating units, the ultrasonic radiator of the first ultrasonic radiating unit and the second, third,...n ultrasonic radiators are connected in sequence through the electrode wire 33 and the common electrode wire 34 . Please refer to Figure 10. The ultrasonic transducer 3 includes a column-type ultrasonic radiating unit group consisting of three ultrasonic radiating units connected end to end.

Embodiment 4

Please refer to FIGS. 11 to 14 . Embodiment 4 of the present invention provides an ultrasonic generating device for assisting thrombolysis. The ultrasonic generating device of this embodiment includes an ultrasonic transducer 42 for assisting thrombolysis, a catheter 41 and a power module as described in any one of the first, second or third embodiments.

In this embodiment, the ultrasonic transducer 42 used to assist thrombolysis is explained by taking the ultrasonic transducer described in Embodiment 1 as an example. It can be understood that the ultrasonic transducers mentioned in other embodiments herein are also applicable to the ultrasonic generating device of this embodiment.

The catheter 41 is used to load the ultrasonic transducer 42 so as to transport the loaded ultrasonic transducer 42 to the thrombolysis site. The material of the conduit 41 includes but is not limited to polyvinyl chloride, polyimide, polyethylene, polytetrafluoroethylene, etc.

Optionally, the ultrasonic generating device also includes an insulating structure, which is used to insulate the ultrasonic transducer 42 from the outside world, thereby ensuring the safety of use of the ultrasonic generating device 4 . As shown in FIG. 12 , the insulating structure may adopt an insulating layer 43 that fills and wraps the ultrasonic transducer 42 . By filling and wrapping the ultrasonic transducer 42 with the insulating layer 43, the energized components of the ultrasonic transducer 42 can be well isolated from the outside world, ensuring the safety of electricity. Alternatively, as shown in FIG. 13 , the conduit 41 doubles as an insulating structure for the ultrasonic transducer 42 . It can be understood that other methods can also be used to achieve the insulation purpose of the ultrasonic transducer, and there is no specific limitation here.

The power module is electrically connected to the ultrasonic transducer 42 and is used to power the ultrasonic transducer 42 . The power module may include: an energy source 45 and a cable 44 . The energy source 45 and the ultrasonic transducer 42 are electrically connected through a cable 44 . Taking the ultrasonic transducer 42 as the ultrasonic transducer described in Embodiment 1 as an example, the cable 44 can be connected to the first conductor 12 and the second conductor 13 to provide electric energy. When the ultrasonic transducer 42 is the ultrasonic transducer described in the second and third embodiments, the cable 44 can be connected correspondingly to its power transmission component, which will not be described again here.

In some examples, the ultrasonic wave generating device 4 may further include: a reinforcing member 46 disposed in the conduit 41 and used to enhance the axial strength of the ultrasonic transducer 42 . When the ultrasonic radiator of the ultrasonic transducer 42 is a hollow cylinder, the reinforcing member 46 can be a reinforcing tube coaxially disposed within the ultrasonic radiator. Reinforcement tubes can be made of metal or plastic. The reinforcing tube can be tightly matched with the ultrasonic radiator or there can be a radial gap between the two. The shape of the enhancement tube may be circular, rectangular, triangular or other suitable shapes, and the length of the enhancement tube may be slightly greater than or equal to the length of the ultrasonic transducer 42 . Understandably, when When the ultrasonic radiator of the ultrasonic transducer 42 has other shapes, the shape of the reinforcing member 46 only needs to match the shape of the ultrasonic transducer 42 . This embodiment places no specific restrictions on the structure, material and installation method of the reinforcement. The axial stiffness of the ultrasonic transducer 42 is enhanced by the reinforcing member 46 to facilitate pushing the ultrasonic wave generating device 4 in the blood vessel.

The ultrasonic generating device 4 serves as an ultrasonic energy radiation component and can be placed at the intravascular treatment site to assist in dissolving thrombi.

Based on the above technical solution, the present invention has at least the following advantages and positive effects:

Those of ordinary skill in the art can understand that the above-mentioned embodiments are specific embodiments for implementing the present application, and in actual applications, various changes can be made in form and details without departing from the spirit and spirit of the present application. scope.

Claims

An ultrasonic transducer for assisting thrombolysis, the ultrasonic transducer includes at least one ultrasonic radiating unit; the ultrasonic radiating unit includes:

Ultrasonic radiators; and

A power transmission component, which is electrically connected to the ultrasonic radiator and used to transmit electrical energy to the ultrasonic radiator.
The ultrasonic transducer for assisting thrombolysis according to claim 1, wherein the ultrasonic radiator is in the form of a hollow cylinder; the outer wall and the inner wall of the hollow cylinder are used for the first electrode and the second electrode respectively.
The ultrasonic transducer for assisted thrombolysis according to claim 2, wherein the power transmission member includes a first wire and a second wire electrically connected to the first electrode and the second electrode respectively;

There are multiple ultrasonic radiating units, and the multiple ultrasonic radiating units have the same structure; the multiple ultrasonic radiating units are connected end-to-end through the first wire and the second wire to form a column-type ultrasonic radiation unit group.
The ultrasonic transducer for assisted thrombolysis according to claim 1, wherein the ultrasonic radiator includes: two radiating plate bodies and a common electrode plate;

The common electrode plate is disposed between the two radiating plate bodies and is electrically connected to the two radiating plate bodies.
The ultrasonic transducer for assisting thrombolysis according to claim 4, wherein the common electrode plate is flat-shaped, and the two radiating plate bodies are respectively attached and fixed on both sides of the common electrode plate.
The ultrasonic transducer for assisting thrombolysis according to claim 4, wherein the two radiating plate bodies are the same and both are rectangular, and the thickness of the two radiating plate bodies is greater than the thickness of the common electrode plate. .
The ultrasonic transducer for assisted thrombolysis according to claim 5 or 6, wherein the power transmission member includes two electrode wires electrically connected to the two radiating plate bodies respectively and the common electrode plate Extended electrode connecting plate;

There are multiple ultrasonic radiating units, and the multiple ultrasonic radiating units have the same structure. The plurality of ultrasonic radiating units are connected end to end through the electrode wires and electrode connecting plates to form a column-type ultrasonic radiating unit group.
The ultrasonic transducer for assisting thrombolysis according to claim 7, wherein the common electrode plate and the electrode connecting plate of the row-type ultrasonic radiation unit group are integrated.
The ultrasonic transducer for assisted thrombolysis according to claim 4, wherein the common electrode plate includes: a plate body;

Two supporting parts are respectively protruded from both ends of the side of the plate body facing any of the radiating plate bodies, a vibration groove is formed between the two supporting parts, and the supporting surfaces of the two supporting parts are in contact with the The radiant panels are connected.
The ultrasonic transducer for assisted thrombolysis according to claim 9, wherein the power transmission component includes: two electrode wires electrically connected to the two radiating plate bodies respectively and connected to the common electrode plate. The common pole conductor;

There are multiple ultrasonic radiating units, and the multiple ultrasonic radiating units have the same structure. The multiple ultrasonic radiating units are connected end to end through the electrode wires and the common electrode wire to form a column-type ultrasonic radiating unit group.
The ultrasonic transducer for assisting thrombolysis according to claim 1, wherein there are multiple ultrasonic radiating units, and the plurality of ultrasonic radiating units are connected end-to-end through the power transmission member to form an ultrasonic radiation array. unit group.
An ultrasonic generating device for assisting thrombolysis, comprising: an ultrasonic transducer and a catheter for assisting thrombolysis according to any one of claims 1 to 11;

The conduit is used to carry the ultrasonic transducer.
The ultrasonic wave generating device for assisted thrombolysis according to claim 12, wherein the ultrasonic wave generating device further includes an insulating structure, the insulating structure is an insulating layer filling and wrapping the ultrasonic transducer or the catheter. Doubles as an insulating structure for the ultrasonic transducer.
The ultrasonic wave generating device for assisting thrombolysis according to claim 12, wherein the ultrasonic wave generating device further includes: a power module, and the power module is electrically connected to the ultrasonic transducer.
The ultrasonic wave generating device for assisting thrombolysis according to claim 12, wherein the ultrasonic wave generating device further includes: a reinforcing member disposed in the catheter and used to enhance the axial strength of the ultrasonic transducer.
The ultrasonic generating device for assisting thrombolysis according to claim 15, wherein when the ultrasonic radiator of the ultrasonic transducer is a hollow cylinder, the reinforcing member is coaxially disposed inside the ultrasonic radiator. of reinforced tubes.