CN218356310U

CN218356310U - Thrombus aspiration catheter

Info

Publication number: CN218356310U
Application number: CN202221870792.4U
Authority: CN
Inventors: 陈纪言; 杨峻青; 周文
Original assignee: APT MEDICAL Inc
Current assignee: APT MEDICAL Inc
Priority date: 2022-07-11
Filing date: 2022-07-11
Publication date: 2023-01-24
Anticipated expiration: 2032-07-11

Abstract

The embodiment of the present disclosure provides a thrombus aspiration catheter, it includes suction catheter and the sacculus pipe of pulling embolism that mutually support, the sacculus pipe of pulling embolism can stretch into in the suction catheter and can reciprocating motion in the suction catheter, suction catheter includes first body, the distal end of first body is the opening setting set up suction chamber and the sacculus chamber that is used for sucking thrombus set up in the first body the distal end of first body set up with the first sacculus of sacculus chamber intercommunication, the sacculus pipe of pulling embolism includes the second body, the distal end of second body is the opening setting the distal end of second body sets up the second sacculus that is used for drawing loose or breaking up thrombus. The embodiment of the disclosure aims at the condition that the suction effect of the existing suction catheter is not ideal, improves the suction effect by improving the structural design of the suction catheter, and achieves the purposes of reducing blood loss, shortening the operation time and increasing the success rate.

Description

Thrombus aspiration catheter

Technical Field

The disclosure relates to the field of medical devices, and in particular relates to a thrombus aspiration catheter.

Background

Coronary atherosclerotic heart disease has become the leading killer of health and life. Acute Myocardial Infarction (AMI) is a disease with a high mortality rate. Even in developed countries such as europe and america where direct percutaneous coronary intervention is popular, the hospitalization mortality rate of acute ST elevation myocardial infarction (STEMI) is still as high as 5% -6%. Therefore, the selection and operation skills of the instruments for the intervention of AMI patients should always be the first task to open the infarct-related artery as soon as possible and save lives.

Coronary artery instability atherosclerotic plaque rupture leads to acute thrombosis to occlude coronary artery lumen, and myocardial cells corresponding to the blood supply area become ischemic or necrotic. The key to treating Acute Coronary Syndrome (ACS) patients lies in rapidly opening infarct-related blood vessels and restoring blood supply of myocardial cells so as to reduce myocardial infarction area, reduce complication risk and improve near-term and long-term prognosis.

In the prior art, an aspiration catheter is usually used to deliver the aspiration catheter to the thrombus site, and the thrombus is withdrawn by negative pressure, reestablishing the blood flow dynamics. However, the design mode and the suction principle of the existing suction catheter lead to the unsatisfactory effect of thrombus suction, such as occurrence of thromboembolism, including distal coronary embolism, side branch vascular embolism, proximal branch embolism and the like; blood loss can also occur, for example, blood clots that do not stick to the vessel wall can not be aspirated.

In summary, the existing mainstream suction catheter has the following disadvantages when sucking thrombus:

1. when in suction, part of thrombus is stuck in the vessel wall, and suction cannot be carried out.

2. A large amount of blood is drawn towards the proximal end of the lesion and is lost.

3. Blood flow from the proximal end of the lesion may flush thrombus, clots, and debris dislodged from the lesion to the distal coronary artery, further causing microvascular embolism in the distal coronary artery.

SUMMERY OF THE UTILITY MODEL

An object of the disclosed embodiments is to provide a thrombus aspiration catheter to solve the problems in the prior art. In order to solve the technical problem, the embodiment of the present disclosure adopts the following technical solutions:

the embodiment of the disclosure provides a thrombus suction catheter, it includes suction catheter and the sacculus pipe of drawing a thrombus of mutually supporting, draw a sacculus pipe of drawing a thrombus can stretch into in the suction catheter and can reciprocating motion in the suction catheter, the suction catheter includes first body, the distal end of first body is the opening setting set up suction chamber and sacculus chamber that are used for sucking the thrombus in the first body the distal end of first body set up with the first sacculus of sacculus chamber intercommunication, draw a sacculus pipe of drawing a thrombus including the second body, the distal end of second body is the opening setting the distal end of second body sets up the second sacculus that is used for drawing the pine or garrulous thrombus.

In some embodiments, a connecting seat is arranged on the first tube body, and the cork pulling balloon catheter extends into the suction cavity of the first tube body through the connecting seat.

In some embodiments, the connecting seat is Y-shaped, one arm of the connecting seat is communicated with the sacculus cavity to inflate the sacculus cavity, and the other arm of the connecting seat is communicated with the suction cavity to extend into the embolus-pulling sacculus catheter.

In some embodiments, the suction lumen and the balloon lumen are arranged side-by-side in the first tube.

In some embodiments, an air pump is disposed at the proximal end of the first tube in communication with the balloon cavity.

In some embodiments, a suction pump is disposed at the proximal end of the first tube in communication with the suction lumen.

In some embodiments, a first indicator is further disposed at a distal end of the first tube, the first indicator being configured to indicate a position of the first balloon.

In some embodiments, a second marker is further disposed at a distal end of the second tube, the second marker indicating a location of the second balloon.

In some embodiments, the second balloon, after inflated and expanded, has a dimension greater than an outer diameter of the first tube.

In some embodiments, the second balloon has a durometer less than the first balloon.

The embodiment of the disclosure aims at the situation that the suction effect of the existing suction catheter is not ideal, the suction catheter is improved in structural design, the suction effect is improved, and the purposes of reducing blood loss, shortening the operation time and increasing the success rate are achieved.

Drawings

In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present disclosure, and for those skilled in the art, other drawings may be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of a thrombus aspiration catheter in accordance with an embodiment of the present disclosure;

FIG. 2 is a schematic structural view of a thrombus aspiration catheter of an embodiment of the present disclosure;

FIG. 3 is a schematic illustration of the operation of a thrombus aspiration catheter in accordance with an embodiment of the present disclosure;

FIG. 4 is a schematic illustration of the operation of a thrombus aspiration catheter of an embodiment of the present disclosure;

figure 5 is a schematic illustration of the operation of a thrombus aspiration catheter in accordance with an embodiment of the present disclosure.

Reference numerals are as follows:

1-a suction catheter; 11-a first tube; 12-a suction lumen; 13-the balloon cavity; 14-a first balloon; 15-first logo; 16-a connection seat; 2-pulling the thrombus balloon catheter; 21-a second tube; 22-second balloon.

Detailed Description

Various aspects and features of the disclosure are described herein with reference to the drawings.

It will be understood that various modifications may be made to the embodiments of the present application. Accordingly, the foregoing description should not be considered as limiting, but merely as exemplifications of embodiments. Other modifications will occur to those skilled in the art within the scope and spirit of the disclosure.

The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the disclosure and, together with a general description of the disclosure given above, and the detailed description of the embodiments given below, serve to explain the principles of the disclosure.

These and other characteristics of the present disclosure will become apparent from the following description of preferred forms of embodiment, given as non-limiting examples, with reference to the attached drawings.

It should also be understood that, although the present disclosure has been described with reference to some specific examples, a person of skill in the art shall certainly be able to achieve many other equivalent forms of the disclosure, having the characteristics as set forth in the claims and hence all coming within the field of protection defined thereby.

The above and other aspects, features and advantages of the present disclosure will become more apparent in view of the following detailed description when taken in conjunction with the accompanying drawings.

Specific embodiments of the present disclosure are described hereinafter with reference to the drawings; however, it is to be understood that the disclosed embodiments are merely exemplary of the disclosure that may be embodied in various forms. Well-known and/or repeated functions and structures have not been described in detail so as not to obscure the present disclosure with unnecessary or unnecessary detail. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present disclosure in virtually any appropriately detailed structure.

The description may use the phrases "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," which may each refer to one or more of the same or different embodiments in accordance with the disclosure.

The embodiment of the disclosure provides a thrombus suction catheter, which is mainly used for solving the technical problem that the existing suction catheter in the prior art has poor effect in thrombus suction, for example, when suction is performed, because part of thrombus is stuck in a blood vessel wall, the thrombus cannot be sucked out, a large amount of blood flowing to a proximal end of a lesion is sucked, the blood is lost too much, the blood flow from the proximal end of the lesion may flush thrombus, clot and debris fallen from the lesion to a coronary vessel tip, and microvascular embolism and the like of the coronary vessel tip are further caused.

The embodiment of the present disclosure provides a thrombus aspiration catheter, as shown in fig. 1 and fig. 2, which includes an aspiration catheter 1 and a thrombus-pulling balloon catheter 2 that are matched with each other, wherein fig. 1 shows a schematic structural view of the aspiration catheter 1, and fig. 2 shows a schematic structural view of the thrombus-pulling balloon catheter 2, and the thrombus-pulling balloon catheter 2 can extend into the aspiration catheter 1 and can move back and forth to cooperate with each other, so that a function of loosening/breaking thrombus in a blood vessel is realized by the thrombus-pulling aspiration catheter 2, and a function of aspirating thrombus after loosening/breaking is realized by the aspiration catheter 1.

Specifically, as shown in fig. 1, the suction catheter 1 includes a first tube 11, a distal end of the first tube 11 is provided in an open manner, where the distal end is an end far from an operator, a suction cavity 12 and a balloon cavity 13 are provided in the first tube 11, a first balloon 14 is provided at the distal end of the first tube 11, wherein the suction cavity 12 and the balloon cavity 13 may be arranged in the first tube 11 in parallel, where the suction cavity 12 is used for sucking thrombus in a blood vessel, a cavity diameter of the suction cavity is determined according to a size of thrombus fragments, the balloon cavity 13 is used for supplying gas to the first balloon 13, the first balloon 14 is inflated by the gas supplied through the balloon cavity 13 to realize inflation, and for this purpose, a gas pump or the like communicated with the balloon cavity 13 may be provided at the proximal end of the first tube 11, wherein the first balloon 14 is preferably provided on an outer wall of the distal end of the first tube 11, and the first balloon 14 is supported between inner walls of the blood vessel after inflation to realize a blood flow blocking effect. In addition, the proximal end of the aspiration lumen 12 can be externally connected to an aspiration pump or the like to facilitate aspiration of thrombus within the vessel through the aspiration lumen 12.

Preferably, a first indicator 15 is further provided at the distal end of the first tube 11, wherein the first indicator 15 is used for indicating the position of the first balloon 14 so as to facilitate the thrombus aspiration operation at the required position.

Further, a connecting seat 16 is provided on the first tube 11, for example, the connecting seat 16 may be provided at the proximal end of the first tube 11, and the pop-up balloon catheter 2 extends into the suction cavity 12 of the first tube 11 through the connecting seat 16. For example, the connecting base 16 may be Y-shaped, one arm of which communicates with the balloon cavity 13 to facilitate the inflation of the balloon cavity 13 by the air pump, and the other arm of which communicates with the suction cavity 12 to facilitate the insertion of the embolectomy balloon catheter 2.

Specifically, the embolectomy balloon catheter 2 comprises a second tube 21, the distal end of the second tube 21 is provided with an opening, and the outer diameter of the second tube 21 is smaller than the inner diameter of the first tube 11, so that the embolectomy balloon catheter 2 can extend into the suction catheter 1 and can reciprocate in the suction catheter 1.

Further, set up second sacculus 22 at the distal end of second body 21, second sacculus 22 can realize expanding after also can inflating, second sacculus 22 is used for drawing loose or drawing up the thrombus on the broken blood vessel wall, and here the size of second sacculus 22 after expanding can be greater than the external diameter of first body 11, like this to can more laminate to the blood vessel wall, thereby promote the effect of drawing loose or drawing up the thrombus. In this way, after the embolectomy balloon catheter 2 is inserted into the suction catheter 1 and moved to the distal end of the suction catheter 1, the second balloon 22 is expanded after protruding out of the distal end of the first tube 11, so as to achieve the operation of pulling loose or crushing the thrombus. The second balloon 22 may be inflated to expand after it has passed through multiple thrombi, so that more thrombi can be pulled loose or broken up by the second balloon 22 during pulling of the tethering balloon catheter 2.

Of course, a second indicator mark is further provided at the distal end of the second tube 21, and the second indicator mark is used for indicating the position of the second balloon 22 so as to determine the position of the second balloon 22 for loosening or breaking thrombus.

In addition, in order to better pull loose or break up the thrombus with the second balloon 22, the second balloon 22 may be less stiff than the first balloon 14, for example, a lower stiffness material may be used to prevent damage to the vessel wall during pulling loose or breaking up the thrombus.

Of course, the length of the second tube 21 can be determined according to the amount of thrombus to be loosened or broken, and the longer the second tube 21 is, the longer the end of the second balloon 22 extending out of the first tube 11 is, and the longer the distance for the pulling or breaking operation is, the more thrombus is loosened or broken.

In the process of thrombus aspiration using an embodiment of the present disclosure, first, as shown in fig. 3, the aspiration catheter 1 is advanced into a blood vessel of a patient along, for example, a guide wire and the guide wire is withdrawn; inflating and expanding the first balloon 14 on the suction catheter 1 through the balloon cavity 13 by an external device, blocking blood flow in a vessel wall through the first balloon 14; as shown in fig. 4, the tethering balloon catheter 2 extends from the suction cavity 12 of the suction catheter 2 through the connecting seat 16 to reach the proximal end of the thrombus lesion position, especially to reach the position of passing through the thrombus, the second balloon 22 on the tethering balloon catheter 2 is expanded, and the tethering balloon catheter 2 is moved back and forth, so that the thrombus stuck on the blood vessel wall is pulled loose/broken through the second balloon 22; as shown in fig. 5, the thrombus-pulling balloon catheter 2 is withdrawn, suction is started by a suction pump or the like connected to the suction catheter 1, and the loosened/crushed thrombus is extracted, thereby completing the whole thrombus suction operation.

Further, while operations are depicted in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order. Under certain circumstances, multitasking and parallel processing may be advantageous. Likewise, while several specific implementation details are included in the above discussion, these should not be construed as limitations on the scope of the disclosure. Certain features that are described in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable subcombination.

Although the subject matter has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.

Although the present disclosure has been described in detail with reference to the specific embodiments, those skilled in the art will be able to make various modifications and alterations to the embodiments based on the concept of the present disclosure, and such modifications and alterations should fall within the scope of the present disclosure.

Claims

1. The utility model provides a thrombus aspiration catheter, its characterized in that includes suction catheter and the draw bolt sacculus pipe of mutually supporting, draw bolt sacculus pipe can stretch into among the suction catheter and can be in reciprocating motion among the suction catheter, suction catheter includes first body, the distal end of first body is the opening setting set up suction chamber and the sacculus chamber that is used for sucking the thrombus set up in the first body the distal end of first body set up with the first sacculus of sacculus chamber intercommunication, draw bolt sacculus pipe to include the second body, the distal end of second body is the opening setting the distal end of second body sets up the second sacculus that is used for drawing the pine or draws the bits of broken thrombus.

2. A thrombus suction catheter according to claim 1, wherein a connecting seat is provided on the first tube, and the thrombus-pulling balloon catheter is extended into the suction lumen of the first tube through the connecting seat.

3. The thrombus aspiration catheter according to claim 2, wherein the connecting seat is Y-shaped, one arm of the connecting seat is communicated with the balloon cavity to inflate the balloon cavity, and the other arm of the connecting seat is communicated with the suction cavity to extend into the thrombus extraction balloon catheter.

4. A thrombus aspiration catheter according to claim 1, wherein the aspiration lumen and the balloon lumen are juxtaposed in the first tube.

5. A thrombus aspiration catheter according to claim 1, wherein an air pump is provided at a proximal end of the first tube body in communication with the balloon lumen.

6. A thrombectomy catheter according to claim 1, wherein a suction pump is disposed at a proximal end of said first tubular body in communication with said suction lumen.

7. A thrombus aspiration catheter according to claim 1, wherein a first index is further provided at a distal end of the first tube for indicating a position of the first balloon.

8. A thrombus aspiration catheter according to claim 1, wherein a second index is further provided at a distal end of the second tube for indicating a position of the second balloon.

9. A thrombus aspiration catheter according to claim 1, wherein the second balloon has a size after inflation and expansion larger than the outer diameter of the first tube.

10. A thrombus aspiration catheter according to claim 1, wherein the second balloon has a hardness less than that of the first balloon.