CN219183967U - Connecting pipe with thrombus filter and thrombus suction device - Google Patents

Abstract

The utility model belongs to the technical field of medical appliances, and particularly relates to a connecting pipe with a thrombus filter and a thrombus suction device. The connecting pipe with the thrombus filter comprises a distal connecting pipe, a proximal connecting pipe and the thrombus filter; the thrombus filter is disposed between the distal connecting tube and the proximal connecting tube; the thrombus filter comprises a thrombus filter container and a thrombus filter screen; the thrombus filter screen is arranged in the thrombus filter container and divides the inner cavity of the thrombus filter container into a cavity to be filtered and a filtering cavity; the distal connecting pipe is communicated with the cavity to be filtered, and the proximal connecting pipe is communicated with the filtering cavity. The connecting tube with the thrombus filter is beneficial to reducing the blood loss of patients when being used for thrombus aspiration operation.

Description

Connecting pipe with thrombus filter and thrombus suction device

Technical Field

The utility model belongs to the technical field of medical appliances, and particularly relates to a connecting pipe with a thrombus filter and a thrombus suction device.

Background

Under the action of various dangerous factors, the blood coagulation and anticoagulation balance of the whole blood coagulation system or the local blood coagulation system in the body are disregulated, so that arterial thrombosis, venous thrombosis, atrial thrombosis or microvascular thrombosis are formed, and once vascular blockage occurs to form thrombosis, the thrombus is killed if the treatment is not timely carried out, and the thrombus is left heavy. The purpose of preventing and treating thrombotic diseases is to improve hypercoagulability, dredge or rebuild blood flow path, so as to prevent and treat ischemia and necrosis of tissue.

Thrombus aspiration procedures are commonly employed in the art to effect removal of thrombus from blood vessels, preventing thrombotic disease. The thrombus aspiration operation can be performed by means of a thrombus aspiration catheter, a connection tube (for connecting the thrombus aspiration catheter and a negative pressure aspiration pump), and a negative pressure aspiration pump. When the negative pressure suction pump works, blood containing thrombus is conveyed to a filter screen on the negative pressure suction pump after passing through the thrombus suction catheter and the connecting pipe, so that the filtration and removal of thrombus in blood vessels are realized. However, the whole length of the existing connecting pipe in the market is between 2.6 meters and 2.9 meters, and in the process that the negative pressure suction pump continuously sucks thrombus, the blood loss of a patient is excessive, so that the patient is injured to a certain extent.

Accordingly, there is a need to provide an improved solution to the above-mentioned deficiencies of the prior art.

Disclosure of Invention

The utility model aims to provide a connecting pipe with a thrombus filter and a thrombus sucking device, so as to solve or improve the problem that the thrombus sucking device in the prior art is easy to cause excessive blood loss of a patient in the process of sucking thrombus.

In order to achieve the above object, the present utility model provides the following technical solutions: a connecting tube with a thrombus filter, which is characterized by comprising a distal connecting tube, a proximal connecting tube and a thrombus filter; the thrombus filter is disposed between the distal connecting tube and the proximal connecting tube; the thrombus filter comprises a thrombus filter container and a thrombus filter screen; the thrombus filter screen is arranged in the thrombus filter container and divides the inner cavity of the thrombus filter container into a cavity to be filtered and a filtering cavity; the distal connecting pipe is communicated with the cavity to be filtered, and the proximal connecting pipe is communicated with the filtering cavity.

Preferably, the thrombus filter screen comprises a base, a support and a filter screen membrane; the base has an axial passage; the support piece is connected with the base and is used for supporting the filter screen film; the filter screen film is attached to the surface of the supporting piece; the inner cavity of the structure surrounded by the filter screen film, the supporting piece and the base is the filter cavity.

Preferably, the plurality of supporting pieces are arranged in the circumferential direction of the base and extend along the axial direction of the base; the thrombus filter screen also comprises a baffle; the baffle is arranged at one end of the supporting piece far away from the base and is connected with the supporting piece.

Preferably, the pore size of the filter membrane is 0.2-0.4mm.

Preferably, the proximal end of the thrombus-filtration container has a proximal interface and the distal end of the thrombus-filtration container has a distal interface; the thrombus filtering container comprises a container main body and a sealing cover; the proximal interface is disposed on the sealing cap and the distal interface is disposed on the container body; the container body is detachably connected with the sealing cover.

Preferably, the sealing cover comprises a sealing plate and a sealing ring; the sealing plate is connected with the proximal end of the sealing ring; the sealing plate is provided with a through hole which is communicated with the proximal end connector and the filtering cavity of the thrombus filtering container; the sealing ring is in threaded connection with the container main body.

Preferably, the sealing cover further comprises a limit ring coaxially arranged with the sealing ring; the outer diameter of the limit ring is smaller than the inner diameter of the seal ring, the limit ring and the seal plate form a clamping groove, and the clamping groove is detachably connected with the proximal end of the thrombus filter screen; the annular region between the limit ring and the sealing ring forms a bottom groove, and a gasket is arranged in the bottom groove.

Preferably, the thrombus filter is prepared from a transparent material.

Preferably, the connecting pipe with the thrombus filter further comprises a two-way valve and/or a connector; the two-way valve is arranged between the thrombus filter and the proximal connecting pipe and used for controlling the on-off of the distal connecting pipe and the proximal connecting pipe; the connector is arranged at the proximal end of the proximal connecting pipe and is used for being connected with a negative pressure suction pump.

The utility model also provides a thrombus suction device, which adopts the following technical scheme: a thrombus-aspiration device comprising a connecting tube with a thrombus filter as described above; the thrombus aspiration device further comprises a thrombus aspiration catheter and/or a negative pressure aspiration pump.

The beneficial effects are that:

compared with the filter screen adopting a negative pressure suction pump in the prior art for filtering thrombus, the connecting pipe with the thrombus filter can filter thrombus in advance, and is beneficial to reducing the blood loss of a patient in the thrombus suction operation process.

The thrombus filter in the connecting pipe with the thrombus filter is easy and convenient to detach and can be reused after being cleaned.

When the connecting pipe with the thrombus filter is used for thrombus aspiration operation, the thrombus aspiration efficiency is improved, and the thrombus aspiration operation time is shortened.

The thrombus filter in the connecting pipe with the thrombus filter can be made of transparent materials, so that the thrombus suction condition can be monitored in real time, and the thrombus filter can be disassembled, washed or replaced in time, thereby being beneficial to avoiding the influence on the thrombus suction efficiency caused by the blockage of the filter screen membrane by thrombus.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. Wherein:

FIG. 1 is a schematic view of a conventional connecting tube;

FIG. 2 is a schematic view showing the overall structure of a connecting tube with a thrombus filter according to an embodiment of the present utility model;

FIG. 3 is a schematic view showing an exploded structure of a thrombus filter according to an embodiment of the present utility model;

FIG. 4 is a schematic structural view of a thrombus filter according to one embodiment of the present utility model;

FIG. 5 is a schematic view showing the overall structure of a thrombus filter container according to one embodiment of the present utility model;

FIG. 6 is an enlarged schematic view of the seal cap of the thrombus filter container provided in one embodiment of the present utility model;

FIG. 7 is an enlarged schematic view of the vessel body of the thrombus filter vessel according to one embodiment of the present utility model;

FIG. 8 is a top view of a vessel body of a thrombus filter vessel provided in one embodiment of the present utility model;

fig. 9 is a schematic diagram of an assembled structure of a seal cover and a thrombus filter according to an embodiment of the present utility model.

Reference numerals:

1-a distal connecting tube; 2-two-way valve; 3-a proximal connection tube; 4-a connector; 5-thrombus filter;

51-thrombus filtration vessel; 52-a thrombus filter screen; 53-a spacer;

51A-a container body; 51 A1-a remote interface;

51B-sealing cover; 51B 1-proximal interface; 51B 2-sealing plate; 51B 3-sealing ring; 51B 4-stop collar; 51B 5-card slot; 51B 6-bottom groove;

521-a base; 522-a support; 523-screen membrane; 524-baffles.

Detailed Description

The following description of the technical solutions in the embodiments of the present utility model will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the utility model, fall within the scope of protection of the utility model.

In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" and "second" may explicitly or implicitly include one or more features.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the term "connected" should be construed broadly, and for example, it may be a fixed connection or an active connection, or it may be a detachable connection or a non-detachable connection, or it may be an integral connection; may be mechanically connected, may be electrically connected, or may be in communication with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements, indirect communication or interaction relationship between the two elements.

The present utility model will be described in detail with reference to examples. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

The direction of blood flow during thrombus aspiration is described below as proximal (i.e., blood flows from distal to proximal under the action of a negative pressure aspiration pump).

As shown in fig. 1, the connecting tube for connecting a thrombus aspiration catheter and a negative pressure aspiration pump is available in the market, and comprises a distal connecting tube 1 (short woven mesh tube), a two-way valve 2, a proximal connecting tube 3 (long woven mesh tube) and a connecting head 4. The distal end of the short woven mesh tube is connected with a thrombus aspiration catheter connector, and the connector 4 is connected with a negative pressure aspiration pump connector. The whole length of the existing connecting pipe in the market is between 2.6 meters and 2.9 meters, wherein the length of the short woven mesh tube is between 20 cm and 30 cm, the negative pressure suction pump is provided with a thrombus filtering device for filtering thrombus, but due to the fact that the whole length of the connecting pipe is overlong, in the process that the negative pressure suction pump continuously sucks thrombus, the blood loss of a patient is excessive, and the patient is injured to a certain extent.

The utility model provides a connecting pipe with a thrombus filter, aiming at the problem that the current thrombus suction device is easy to cause excessive blood loss of a patient in the process of sucking thrombus. As shown in fig. 2 to 3, the connecting tube with thrombus filter of the present utility model comprises a distal connecting tube 1, a proximal connecting tube 3 and a thrombus filter 5; a thrombus filter 5 is arranged between the distal connecting tube 1 and the proximal connecting tube 3; the thrombus filter 5 includes a thrombus filter container 51 and a thrombus filter screen 52; the thrombus filter screen 52 is arranged inside the thrombus filter container 51 to divide the inner cavity of the thrombus filter container 51 into a to-be-filtered cavity and a filtering cavity; the far-end connecting pipe 1 is communicated with the cavity to be filtered, and the near-end connecting pipe 3 is communicated with the filtering cavity. Wherein, through setting up thrombus filter screen 52 inside thrombus filter container 51, under the negative pressure suction effect, after the blood that waits to filter in distal end connecting pipe 1 gets into waiting to filter the chamber, again through thrombus filter screen 52's filtration, thrombus is held back by thrombus filter screen 52, and the blood after removing the thrombus then can get into the filter chamber, gets into proximal end connecting pipe 3 from the filter chamber. The far-end connecting pipe 1 and the near-end connecting pipe 3 can respectively adopt braided pipes; the length of the distal connection tube 1 may be 20 cm-30 cm.

Compared with the scheme of filtering thrombus by adopting a filter screen of a negative pressure suction pump in the prior art, the thrombus filtering device has the advantages that the thrombus filter 5 is arranged between the far-end connecting pipe 1 and the near-end connecting pipe 3, and blood can be filtered in advance without flowing through the whole connecting pipe (2.6-2.9 m); and when thrombus suction in the blood vessel is finished, less blood enters the connecting pipe, and the blood loss of a patient is reduced (because the whole length of the connecting pipe is longer, the filter screen of the negative pressure suction pump is used for filtering thrombus in the prior art, and the thrombus needs to flow through a longer pipeline to be removed by filtering, so that when the thrombus suction is finished, the blood needs to flow through the whole connecting pipe, more blood in a human body can enter the connecting pipe, and the blood loss of the patient is overlarge). When the connecting pipe with the thrombus filter is used for thrombus aspiration operation, the thrombus aspiration efficiency is improved, and the thrombus aspiration operation time is shortened.

In a preferred embodiment of the present utility model, as shown in FIG. 4, thrombotic screen 52 includes a base 521, a support 522, and a screen membrane 523; the base 521 has an axial passage (both ends of the base 521 open in the axial direction, forming an axial passage with its own hollow inner cavity); a support 522 coupled to the base 521 for supporting the filter membrane 523; the filter membrane 523 is attached to the surface of the support 522; the inner cavity of the structure surrounded by the filter membrane 523, the support 522 and the base 521 is a filter cavity (not shown). By providing the support 522, the filter membrane 523 can maintain a fixed shape during use, and the filtering efficiency is ensured.

In the preferred embodiment of the present utility model, the support member 522 has a plurality of support members, which are disposed in the circumferential direction of the base 521 and extend along the axial direction of the base 521; thrombus filter 52 also includes a baffle 524 (a closed structure through which blood cannot pass); a baffle 524 is disposed at an end of the support 522 remote from the base 521 and is connected to the support 522 (the distal end of the screen membrane 523 may also be secured to the baffle 524). The baffle 524 is arranged to help strengthen the overall stability of the thrombus filter 52, and to help prevent thrombus-containing blood from directly entering the filter chamber without passing through the filter membrane 523, and to help ensure the thrombus filter effect of the thrombus filter 52.

In the preferred embodiment of the present utility model, the mesh size of the screen membrane 523 is 0.2-0.4mm. The pore diameter of the filter membrane 523 is between 0.2 and 0.4mm, blood can easily pass through the filter membrane, thrombus can be blocked in the cavity to be filtered, the thrombus filtering effect is guaranteed, and the thrombus sucking efficiency of the thrombus sucking device is improved.

In the preferred embodiment of the utility model, the thrombus filtering container has a capacity of 40-60mL and a large capacity, which is beneficial to improving the thrombus filtering efficiency.

In a preferred embodiment of the present utility model, as shown in FIGS. 5-8, the proximal end of thrombus-filtration container 51 has a proximal port 51B1 and the distal end of thrombus-filtration container 51 has a distal port 51A1; the thrombus-filtering container 51 includes a container main body 51A and a seal cover 51B; the proximal end interface 51B1 is provided on the seal cover 51B, and the distal end interface 51A1 is provided at the distal end of the container main body 51A; the container body 51A is detachably connected to the seal cap 51B (the proximal end of the container body 51A is provided with a mounting hole, and the seal cap 51B is fitted to the mounting hole to maintain the tightness of the thrombus filter container 51 and prevent blood from entering the places other than the proximal connection tube 3, the distal connection tube 1 and the thrombus filter 5). Wherein the arrangement of the proximal end interface 51B1 is conducive to the connection of the thrombus-filtering container 51 to the proximal connecting tube 3 (one end of the proximal end interface 51B1 communicates with the proximal connecting tube 3, and the other end of the proximal end interface 51B1 communicates with the filter chamber of the thrombus-filtering container 51); the arrangement of the distal port 51A1 is conducive to realizing the connection of the thrombus filter container 51 and the distal connecting tube 1 (one end of the distal port 51A1 is communicated with the distal connecting tube 1, and the other end of the distal port 51A1 is communicated with the to-be-filtered cavity of the thrombus filter container 51), so that the thrombus filter can be conveniently disassembled and assembled.

Preferably, the proximal interface 51B1 or the distal interface 51A1 may be connected to the proximal connection tube 3 or the distal connection tube 1 by a luer fitting, which is convenient for an operator to install or detach. By detachably connecting the seal cover 51B and the container main body 51A, the thrombus-filtering screen 52 (the screen film 523) inside the thrombus-filtering container 51 can be replaced or cleaned, etc., as the case may be, contributing to securing the working efficiency of the thrombus-filtering container 51.

In the preferred embodiment of the present utility model, the sealing cover 51B includes a sealing plate 51B2 (the sealing plate 51B2 is not fully shown in fig. 6 because fig. 6 is a side view of the sealing cover 51B) and a sealing ring 51B3; the sealing plate 51B2 is connected to the proximal end of the sealing ring 51B3 (the sealing plate 51B2 closes the proximal opening of the sealing ring 51B 3); the sealing plate 51B2 is provided with a through hole (not shown in the figure) which communicates with the proximal end opening 51B1 and the filter chamber of the thrombus filter container 51; the seal ring 51B3 is screwed to the container body 51A.

In the preferred embodiment of the present utility model, the sealing cover 51B further includes a stop collar 51B4 coaxially disposed with the sealing ring 51B3; the outer diameter of the limit ring 51B4 is smaller than the inner diameter of the seal ring 51B3 (the limit ring 51B4 is arranged in the inner diameter range of the seal ring 51B 3), the limit ring 51B4 and the seal plate 51B2 enclose a clamping groove 51B5, the clamping groove 51B5 is detachably connected with the proximal end of the thrombus filter screen 52 (for example, the inner diameter of the limit ring 51B4 is matched with the outer diameter of the base 521; as shown in fig. 9, the base 521 and the clamping groove 51B5 can be detachably connected to realize the detachable connection of the seal cover 51B and the thrombus filter screen 52); the annular region between the retainer 51B4 and the seal 51B3 forms a bottom groove 51B6, and a gasket 53 is provided in the bottom groove 51B 6. The provision of the gasket 53 helps to improve the sealability between the seal ring 51B3 and the container body 51A, and ensures that no leakage or leakage occurs during the continuous suction under negative pressure.

Preferably, the inner wall of the seal ring 51B3 is provided with an internal thread, and the seal ring 51B3 is screwed with the proximal end of the container body 51A (the outer wall of the mounting port of the container body 51A is provided with an external thread); the outer diameter of the retainer ring 51B4 is adapted to the inner diameter of the proximal end of the container body 51A (so that the retainer ring 51B4 can be precisely attached to the inner wall of the container body 51A, improving the sealing property of the connection between the container body 51A and the seal cover 51B). More preferably, the stopper ring may be made of an elastic material, so as to further improve the tightness of the connection between the container body 51A and the sealing cover 51B, and the stability of the connection between the base 521 and the clamping groove 51B 5.

In the preferred embodiment of the present utility model, as shown in fig. 4, the base 521 includes a small diameter section, a flare section and a large diameter section in the axial direction, the large diameter section being connected with the sealing cover 51B to help improve the stability of the connection of the base 521 with the sealing cover 51B.

In the preferred embodiment of the present utility model, the thrombus filter 5 is made of transparent material. By adopting the thrombus filter 5 made of transparent materials, the thrombus suction device is convenient to observe at any time in the thrombus suction process. If more thrombus is found, the filter membrane 523 is blocked, no blood flows, the thrombus filter 5 can be removed, the filter membrane 523 is washed clean with physiological saline, and then reinstalled (the base 521 of the thrombus filter 52 is clamped in the clamping groove 51B5 of the sealing cover 51B to realize the connection of the thrombus filter 52 and the sealing cover 51B, the gasket 53 is arranged in the bottom groove 51B6, then the container main body 51A is in threaded connection with the sealing cover 51B, and finally the proximal end interface 51B1 is connected with the proximal end connecting pipe 3, and the distal end interface 51A1 is connected with the distal end connecting pipe 1), so that the thrombus filter can be continuously used for filtering in the thrombus aspiration process, thereby being beneficial to shortening the time of a thrombus aspiration operation.

In a preferred embodiment of the present utility model, as shown in fig. 2, the connecting tube with thrombus filter of the present utility model further comprises a two-way valve 2 and/or a connector 4; the two-way valve 2 is arranged between the thrombus filter 5 and the proximal connecting pipe 3 and is used for controlling the on-off of the distal connecting pipe 1 and the proximal connecting pipe 3; the connector 4 is arranged at the proximal end of the proximal connecting tube 3 for connection with a negative pressure suction pump. The two-way valve 2 or the connector 4 may be a member commonly used in the prior art, and will not be described herein.

The utility model also proposes a thrombus aspiration device comprising a connecting tube with a thrombus filter as described above; the thrombus aspiration device further comprises a thrombus aspiration catheter and/or a negative pressure aspiration pump. As described above, the thrombus aspiration device adopts the connecting pipe with the thrombus filter, which is helpful for reducing the blood loss of the patient and the damage to the patient in the process of continuously aspirating thrombus by the negative pressure aspiration pump.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. A connecting tube with a thrombus filter, which is characterized by comprising a distal connecting tube, a proximal connecting tube and a thrombus filter;

the thrombus filter is disposed between the distal connecting tube and the proximal connecting tube;

the thrombus filter comprises a thrombus filter container and a thrombus filter screen;

the thrombus filter screen is arranged in the thrombus filter container and divides the inner cavity of the thrombus filter container into a cavity to be filtered and a filtering cavity;

the distal connecting pipe is communicated with the cavity to be filtered, and the proximal connecting pipe is communicated with the filtering cavity.

2. The connection tube with thrombus filter of claim 1 wherein the thrombus filter comprises a base, a support and a filter membrane;

the base has an axial passage;

the support piece is connected with the base and is used for supporting the filter screen film;

the filter screen film is attached to the surface of the supporting piece; the inner cavity of the structure surrounded by the filter screen film, the supporting piece and the base is the filter cavity.

3. The connection tube with a thrombus filter as in claim 2 wherein the support has a plurality of circumferentially arranged and axially extending said base;

the thrombus filter screen also comprises a baffle;

the baffle is arranged at one end of the supporting piece far away from the base and is connected with the supporting piece.

4. A connection tube with a thrombus filter according to claim 2 wherein the mesh size of the screen membrane is 0.2-0.4mm.

5. The connection tube with thrombus filter of claim 1 wherein the proximal end of the thrombus filter container has a proximal port and the distal end of the thrombus filter container has a distal port;

the thrombus filtering container comprises a container main body and a sealing cover;

the proximal interface is disposed on the sealing cap and the distal interface is disposed on the container body;

the container body is detachably connected with the sealing cover.

6. The connection tube with a thrombus filter as in claim 5 wherein the seal cap comprises a seal plate and a seal ring;

the sealing plate is connected with the proximal end of the sealing ring;

the sealing plate is provided with a through hole which is communicated with the proximal end connector and the filtering cavity of the thrombus filtering container;

the sealing ring is in threaded connection with the container main body.

7. The connection tube with a thrombus filter as in claim 6 wherein said seal cap further comprises a stop collar coaxially disposed with said seal ring;

the outer diameter of the limit ring is smaller than the inner diameter of the seal ring, the limit ring and the seal plate form a clamping groove, and the clamping groove is detachably connected with the proximal end of the thrombus filter screen;

the annular region between the limit ring and the sealing ring forms a bottom groove, and a gasket is arranged in the bottom groove.

8. The connection tube with a thrombus filter according to claim 1, wherein the thrombus filter is made of a transparent material.

9. The connection tube with a thrombus filter according to claim 1, wherein said connection tube with a thrombus filter further comprises a two-way valve and/or a connection head;

the two-way valve is arranged between the thrombus filter and the proximal connecting pipe and used for controlling the on-off of the distal connecting pipe and the proximal connecting pipe;

the connector is arranged at the proximal end of the proximal connecting pipe and is used for being connected with a negative pressure suction pump.

10. A thrombus aspiration device, comprising a connecting tube with a thrombus filter according to any one of claims 1-9;

the thrombus aspiration device further comprises a thrombus aspiration catheter and/or a negative pressure aspiration pump.

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