CN216439268U

CN216439268U - Thrombus suction device and pusher

Info

Publication number: CN216439268U
Application number: CN202122816030.8U
Authority: CN
Inventors: 刘载淳; 黄定国
Original assignee: Shanghai Tendfo Medical Technologies Co Ltd
Current assignee: Shanghai Tendfo Medical Technologies Co Ltd
Priority date: 2021-11-17
Filing date: 2021-11-17
Publication date: 2022-05-06
Anticipated expiration: 2031-11-17

Abstract

The utility model provides a thrombus aspiration device and a pusher. The thrombus aspiration device comprises: a suction sheath and a suction funnel; the suction funnel comprises: a funnel support and a film; the funnel support is an expandable and contractible funnel support structure with a large distal opening and a small proximal opening; the near end of the funnel support is connected with the far end of the suction sheath tube; the covering membrane is coated on the funnel support. The embodiment of the utility model ensures that the suction sheath tube performs centralized suction through the supporting function of the suction funnel, can enlarge a suction opening, improves the suction efficiency, reduces the blood loss amount, and is convenient and fast to operate.

Description

Thrombus suction device and pusher

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a thrombus suction device and a pusher.

Background

Vascular diseases become important factors influencing human health, and interventional thrombus removal is a research hotspot in the field of thrombus treatment at present.

The suction embolus treatment mode is more common in clinical application in recent years, but due to the complexity of the anatomical form of blood vessels, the current suction catheter is often tightly adhered to one blood vessel wall during suction, the suction effect is poor, the blood loss in the suction process is large, and the risk of damaging the blood vessel wall is damaged.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model aims to provide a thrombus suction device and a pusher, which are used for solving the problems of low suction efficiency, large blood loss and easy damage to blood vessel walls.

To solve the above technical problem, according to an aspect of the present invention, there is provided a thrombus aspiration device including: a suction sheath and a suction funnel;

the suction funnel comprises: a funnel support and a film;

the funnel support is of a funnel support structure which can be expanded and contracted and has a large distal opening and a small proximal opening; the proximal end of the funnel support is connected with the distal end of the suction sheath tube;

the covering film is coated on the funnel support.

In addition, the peripheral wall of the suction funnel is provided with a plurality of through holes.

In addition, the funnel support includes: a plurality of supporting bars and connecting rings;

the connecting ring is fixedly arranged at the near end of the suction sheath tube, the near ends of the support strips are connected with the connecting ring, and the support strips surround the center of the connecting ring and are uniformly arranged at intervals in the circumferential direction to form a funnel-shaped support framework expanding from the near end to the far end; the film is fixedly arranged on the supporting framework.

In addition, the supporting bar includes: the near end of the axial support bar is connected with the connecting ring, and the circumferential support bar is vertically connected with the far end of the axial support bar;

the circumferential support bars of the plurality of support bars are circumferentially aligned.

In addition, the axial support strip with be the arc between the go-between and link up, the axial support strip with be the arc between the circumferential direction support strip and link up.

In addition, the through holes comprise a plurality of through hole groups arranged on the covering film between any two adjacent supporting strips; each through hole group comprises a plurality of through holes; each through hole in a plurality of through hole groups is aligned in the circumferential direction, and the area of each through hole in each through hole group is increased along with the increase of the distance between the supporting strips on the two sides.

In addition, the cover film is made of the following materials: polyethylene, ultra high molecular weight polyethylene, polyester, nylon, or polyurethane.

In addition, the funnel support is formed by a memory metal pipe through laser engraving.

In addition, the suction sheath comprises a sheath body and a sheath handle;

the sheath tube handle is used for controlling the distal end of the sheath tube body to bend towards the proximal side.

According to another aspect of the present invention, there is provided a pusher, which is capable of cooperating with the aforementioned thrombus aspiration device, and which is capable of passing through an aspiration sheath of the thrombus aspiration device and is configured to deliver and release an aspiration funnel disposed at a distal end of the aspiration sheath; the pusher includes:

a pusher head having an annular cavity open towards a proximal end for receiving the suction funnel in a compressed state;

the distal end of the pushing rod is connected with the proximal end of the pushing head, and the pushing rod and the pushing head can be arranged on the suction sheath tube in a penetrating manner and can axially move relative to the suction sheath tube; and

a drive assembly having a distal end coupled to the proximal end of the suction sheath, the drive assembly being fixedly coupled to the push rod and configured to drive the push rod to move distally within the suction sheath to release the suction funnel.

In addition, the driving assembly includes:

the pushing handle is of a tubular structure, the pushing rod penetrates through the pushing handle, and the pushing handle is provided with a sliding lock mechanism; and

the push button is fixedly connected with the push rod and matched with the sliding lock mechanism, the push button is used for driving the push rod to move axially relative to the push handle, and the sliding lock mechanism can lock the push button on the push handle.

In addition, the push handle includes: the handle joint is used for connecting the pusher to the near end of the suction sheath;

the slide lock mechanism includes: the sliding chutes are symmetrically arranged on the peripheral wall of the handle body and extend along the axial direction, and the elastic locking pieces are fixedly arranged in the handle body and extend along the axial direction, and are provided with two groups of symmetrically arranged racks; each group of racks respectively comprises a plurality of sawteeth which are uniformly distributed along the axial direction;

push away the button and include the operating portion that two symmetries set up, the outer end of operating portion exposes respectively the spout, the inner of operating portion includes: the fixing part is connected with the pushing rod, and the locking head is abutted against the rack.

According to the technical scheme, the utility model has at least the following advantages and positive effects:

in the thrombus suction device provided by the embodiment of the utility model, the suction funnel is arranged at the far end of the suction sheath tube, and the suction funnel is of an expandable funnel-shaped support structure, so that the suction funnel can support the inner wall of a blood vessel at the tube opening of the suction sheath tube after being released, the tube opening of the suction sheath tube can not be tightly attached to the blood vessel wall on one side according to the centering, the inner wall of the blood vessel is prevented from being damaged, meanwhile, the suction funnel can also provide a larger thrombus suction opening, the suction efficiency is improved, and the blood loss is reduced.

Drawings

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

FIG. 1 is a schematic structural view of a thrombus extraction device according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of an aspiration funnel of a thrombus aspiration device according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of a thrombus extraction device provided in accordance with a second embodiment of the present invention;

fig. 4 is a schematic structural diagram of a pusher according to a third embodiment of the present invention;

fig. 5 is a partial cross-sectional structure diagram of fig. 4.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that numerous technical details are set forth in order to provide a better understanding of the present invention in its various embodiments. However, the technical solution claimed in the present invention can be implemented without these technical details and various changes and modifications based on the following embodiments.

In the description of the present application, various terms indicating orientation or positional relationship such as "center", "upper", "lower", "inner", "outer", etc. are used for convenience of description only based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, or be operated, and thus, should not be construed as limiting the present application.

Unless otherwise stated, the proximal and distal ends referred to in the present invention have the same meaning in the orientation, i.e., in the use state, the distal end is the end away from the operator, and the proximal end is the end close to the operator, who controls the thrombus aspiration device at the proximal end.

Referring to fig. 1 to 2, a thrombus suction device suitable for sucking thrombus in a blood vessel is provided according to an embodiment of the present invention.

As shown in fig. 1, the thrombus aspiration device of the present embodiment includes: a suction sheath 2 and a suction funnel 1. The suction funnel 1 comprises: a funnel holder and a cover film 11. The proximal end of the funnel stent is connected with the distal end of the suction sheath 2. The funnel support is an expandable and contractible funnel support structure with a large distal opening and a small proximal opening. The membrane 11 is coated on the funnel support, and forms a funnel-shaped suction structure together with the funnel support.

When the thrombus suction device reaches the thrombus suction position, the funnel support can expand after the suction funnel is released, and the covering film 11 is driven to be expanded to form the suction funnel. The self-expanding nature of the funnel stent may be formed using a memory material. At the moment, the suction funnel can be fully opened and attached to the inner wall of the blood vessel, the suction funnel is of a hollow structure similar to a cone, and meanwhile, the suction funnel can be provided with a bell-mouth-shaped suction port, namely the opening at the far end of the suction funnel is larger than the pipe orifice of the suction sheath pipe, so that the far end of the suction sheath pipe is centered in the blood vessel and cannot be attached to one side of the blood vessel wall; in addition, the suction port of the bell mouth type can also enlarge a thrombus suction inlet, improve the thrombus suction efficiency and reduce the blood loss.

As shown in fig. 2, the funnel support may include: a plurality of support bars 13 and a connection ring 12. The connecting ring 12 is fixedly arranged at the near end of the suction sheath tube 2, and the near ends of a plurality of supporting strips 13 are connected with the connecting ring 12. The support bars 13 are uniformly arranged around the center of the connecting ring 12 in a circumferential direction at intervals and form a funnel-shaped support framework expanding from the near end to the far end, and the coating film 11 is fixedly arranged on the support framework. Each support strip 13 may be fixed to the surface of the covering membrane 11 by means of heat pressing or the like, and the covering membrane 11 is supported by the plurality of support strips 13, so that the suction funnel can be unfolded into a funnel-shaped structure, i.e., a hollow structure approximating a frustum shape with a large distal end and a small proximal end, when in use.

Further, the supporting bar 13 may include: an axial support bar 131 connected at a proximal end to the coupling ring 12 and a circumferential support bar 132 connected perpendicularly to a distal end of the axial support bar 131. The axial support bar 131 is expandable and contractible in the radial direction. The circumferential support strips 132 of the plurality of support strips 13 are circumferentially aligned so as to support the covering membrane at the distal end of the suction funnel, so that the suction funnel is provided with an annular suction port to better adhere to the blood vessel and facilitate complete suction of the thrombus. The axial support bar 131 is arc-shaped connected to the connection ring 12, and the axial support bar 131 is arc-shaped connected to the circumferential support bar 132.

It should be noted that the funnel support can be made of memory metal tube by laser engraving, and the memory metal is preferably nickel-titanium alloy. It will be appreciated that the funnel support may also be woven from wire. And is not particularly limited herein.

The covering film 11 may be made by weaving, weaving or extruding with silk threads, and the material of the covering film includes, but is not limited to, polyethylene, ultra-high molecular weight polyethylene, polyester, nylon and polyurethane.

In some examples, the suction funnel 2 may be provided with several through holes 14 in its circumferential wall. Make the blood vessel and the suction funnel 1 inner chamber intercommunication of suction position department through a plurality of through-holes 14, can make the vascular inner wall attached on suction funnel 1 surface in the suction process, the pressure differential that causes tectorial membrane 11 pressurized deformation to influence the thrombus suction when avoiding blood vessel and suction funnel 1 not to communicate, still can block the blood flow entering suction sheath pipe of non-suction blood vessel section simultaneously.

Specifically, the plurality of through holes may include a plurality of through hole groups opened on the cover film 11 between any two adjacent supporting strips 13. Each via group may include several vias 14. Wherein, each through-hole 14 in a plurality of through-hole groups aligns circumferentially, and the area of each through-hole 14 in every through-hole group increases along with the increase of the distance between the support bars 13 of both sides to can make the vascular wall more evenly attached at the suction funnel 1 surface. Illustratively, the through-hole 1 may be a circular through-hole, an elliptical through-hole, or the like. It can be understood that the number, shape, size, and the like of the through holes of each through hole group are not particularly limited in this embodiment, as long as the protection of the blood vessel wall and the avoidance of the influence of the coating film on the suction effect are facilitated.

Compared with the prior art, the thrombus suction device provided by the embodiment of the utility model has the advantages that the suction funnel is arranged at the far end of the suction sheath tube, and the suction funnel is of an expandable funnel-shaped support structure, so that the suction funnel can support the inner wall of a blood vessel at the tube opening of the suction sheath tube after being released, the tube opening of the suction sheath tube can not be tightly attached to the blood vessel wall on one side according to the centering, the inner wall of the blood vessel is prevented from being damaged, meanwhile, the suction funnel can also provide a larger thrombus suction opening, the suction efficiency is improved, and the blood loss is reduced.

Referring to fig. 3, a thrombus aspiration device is provided according to a second embodiment of the present invention. The thrombus aspiration device of the present embodiment is substantially the same as the thrombus aspiration device of the first embodiment, and the main difference is that the aspiration sheath of the thrombus aspiration device of the present embodiment is an adjustable bent sheath. The differences between the two will be described below, and the same parts will not be described again.

As shown in fig. 3, the suction sheath 2 includes a sheath body 21 and a sheath handle 22. The distal end of the sheath body 21 is connected with the proximal end of the suction funnel 1, i.e. the distal end of the sheath body 21 is connected with the suction funnel 1 through a connecting ring. The sheath handle 22 is used to control the distal end of the sheath body 21 to bend to the proximal side.

Alternatively, the sheath handle 22 can control the distal end of the sheath body 21 to be bent 180 ° to the proximal side in opposite two directions. For example, the sheath handle 22 may control the sheath body 21 to bend first upward and then proximally or first downward and then proximally 180 °.

In the use process, the suction port of the suction funnel 1 can be adjusted to a proper suction direction or suction angle through the operation handle 22, so that the thrombus can be more accurately aligned, the thrombus suction is convenient, and the operation time is favorably shortened.

Compared with the prior art, the thrombus suction device provided by the embodiment of the utility model has the advantages that the suction funnel is arranged at the far end of the suction sheath tube, and the suction funnel is of an expandable funnel-shaped support structure, so that the suction funnel can support the inner wall of a blood vessel at the tube opening of the suction sheath tube after being released, the tube opening of the suction sheath tube can not be tightly attached to the blood vessel wall on one side according to the centering, the inner wall of the blood vessel is prevented from being damaged, meanwhile, the suction funnel can also provide a larger thrombus suction opening, the suction efficiency is improved, and the blood loss is reduced; in addition, the suction sheath tube in the thrombus suction device of the embodiment can be bent according to the shape of the blood vessel, so that the suction requirements of the blood vessels with different shapes can be met.

Referring to fig. 4 to 5, a pusher 3 according to a third embodiment of the present invention can be used with the thrombus aspiration device according to the first or second embodiment. The pusher of the present embodiment can be inserted into the aspiration sheath 2 of the thrombus aspiration device, and is used to deliver and release the aspiration funnel 1 disposed at the distal end of the aspiration sheath 2.

The pusher 3 of the embodiment of the present invention includes: a pushing head 31, a pushing rod 32 and a driving component.

The pusher head 31 has an annular cavity open towards the proximal end for receiving the suction funnel 1 in a compressed state, facilitating its reception in the pusher head 31 from the distal end of the suction funnel 1. Further, the distal end of the pushing head 31 is tapered, i.e. the pushing head 31 has a tapered tip, which improves the guiding and advancing capability of the suction sheath 2 in the blood vessel.

The distal end of the push rod 32 is connected to the proximal end of the push head 31, and the push head 31 and the push rod 32 are disposed through the suction sheath 2 and axially movable with respect to the suction sheath 2. The pushing head 31 may be fixed to the distal end of the pushing rod 32 by welding, gluing or heat fusion.

The distal end of the drive assembly may be connected to the proximal end of the suction sheath 2, the drive assembly being fixedly connected to the push rod 32 and being adapted to drive the push rod 32 to move distally within the suction sheath 2 to release the suction funnel 1.

Referring to fig. 4 to 5, in use, the pusher 3 is inserted into the suction sheath 2, the suction funnel 1 at the distal end of the suction sheath 2 is accommodated in the annular cavity of the pushing head 31, and the distal end of the driving assembly is connected to the proximal end of the suction sheath 2. Then, the suction sheath 2 is pushed to the thrombus suction position, and the driving assembly drives the pushing rod 32 to drive the pushing head 31 to move towards the far end in the axial direction in the suction sheath 2 so as to release the suction funnel 1, so that the far end opening of the suction funnel 1 is opposite to the thrombus. The pusher 3 is then entirely withdrawn until the aspiration sheath 2 is completely withdrawn.

The driving assembly may include: a push handle and a push button 35. The pushing handle is of a tubular structure, and the pushing rod 32 penetrates through the pushing handle and can axially move relative to the pushing handle. The propelling movement handle is equipped with sliding lock mechanism, pushes away button 35 and propelling movement pole 32 fixed connection and with sliding lock mechanism cooperation, pushes away button 35 and is used for driving propelling movement pole 32 relative propelling movement handle axial displacement, and sliding lock mechanism can lock pushing away button 35 in the propelling movement handle. When the pushing head 31 reaches the target thrombus position, the pushing rod 32 can drive the pushing head 31 to move towards the far end by only pushing the pushing button 35 so as to release the suction funnel 1, and when the pushing button 35 is loosened, the sliding lock mechanism can automatically lock the pushing button 35 on the pushing handle so as to prevent the pusher 3 from moving in the suction sheath 2.

The push handle may include: a handle body 34 and a handle joint 33 fixedly arranged at the far end of the handle body 34, wherein the handle joint 33 is used for connecting the pusher 3 to the near end of the suction sheath 2. The handle adapter 33 may be screwed to the proximal end of the suction sheath 2.

The slide lock mechanism includes: the symmetry sets up in the spout of handle body 34 perisporium and along axial extension and sets firmly in handle body 34 and along the elastic locking piece of axial extension, and elastic locking piece has two sets of racks of symmetry setting. Each set of racks comprises a plurality of teeth 36 distributed uniformly in the axial direction. The push button 35 includes two symmetrically-arranged operation portions, the outer end 351 of each operation portion exposes out of the sliding groove, and the inner end of the operation portion includes: a fixing portion 353 connected to the pushing rod 32 and a locking head 352 abutting against the rack. The push button 35 is movable along the slide groove in the handle body. The rack may be made of an elastic material, and pushing the outer end of the push button 35 overcomes the resistance of the rack against the locking head 352 at the inner end of the push button, so that the push rod 32 can move axially relative to the push handle. The push button 35 can be locked to the push handle by the locking action of the rack. The serrations 36 are shaped to facilitate distal movement of the push button and to prevent proximal movement of the push button.

According to the pusher disclosed by the embodiment of the utility model, when the push button is not pushed, the push rod can be locked on the push handle, and when the push button is pushed, the push rod can be automatically unlocked and the push head can be moved to the far end to release the sheath positioning bracket, so that the operation is convenient and fast.

It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the utility model, and that various changes in form and details may be made therein without departing from the spirit and scope of the utility model in practice.

Claims

1. A thrombus aspiration device, comprising: a suction sheath and a suction funnel;

the suction funnel comprises: a funnel support and a film;

the covering film is coated on the funnel support.

2. A thrombus aspiration device according to claim 1, wherein the aspiration funnel peripheral wall is provided with a plurality of through holes.

3. A thrombus aspiration device according to claim 2, wherein the funnel holder comprises: a plurality of supporting bars and connecting rings;

4. A thrombus aspiration device according to claim 3, wherein the support strip comprises: the near end of the axial support bar is connected with the connecting ring, and the circumferential support bar is vertically connected with the far end of the axial support bar;

5. The thrombus aspiration device according to claim 3, wherein the plurality of through-holes comprises a plurality of through-hole groups opened on the cover membrane between any two adjacent support strips; each through hole group comprises a plurality of through holes; each through hole in a plurality of through hole groups is aligned in the circumferential direction, and the area of each through hole in each through hole group is increased along with the increase of the distance between the supporting strips on the two sides.

6. The thrombus aspiration device according to claim 1, wherein the funnel holder is laser engraved from a memory metal tube.

7. The thrombus aspiration device of claim 1, wherein the aspiration sheath comprises a sheath body and a sheath handle;

the sheath handle is used for controlling the distal end of the sheath body to bend towards the proximal side.

8. A pusher adapted to cooperate with the thrombectomy device of any of claims 1-7, wherein the pusher is adapted to be inserted through an aspiration sheath of the thrombectomy device and adapted to deliver and release an aspiration funnel disposed at a distal end of the aspiration sheath; the pusher includes:

9. The presenter of claim 8, wherein the drive assembly comprises:

10. The pusher of claim 9, wherein the pushing handle comprises: the handle joint is used for connecting the pusher to the near end of the suction sheath;