CN219480245U

CN219480245U - Cutting guide wire and thrombus aspiration system

Info

Publication number: CN219480245U
Application number: CN202223059203.7U
Authority: CN
Inventors: 周红欣; 梁栋科; 宦玮; 孙春明; 程光
Original assignee: Shanghai Kindly Medical Instruments Co ltd
Current assignee: Shanghai Yingtai Medical Equipment Co ltd
Priority date: 2022-11-17
Filing date: 2022-11-17
Publication date: 2023-08-08
Anticipated expiration: 2032-11-17

Abstract

The utility model provides a cutting guide wire and a thrombus sucking system, wherein the cutting guide wire comprises a guide wire body and a thrombus cutting piece, the distal end of the guide wire body is suitable for being arranged in a sucking catheter in a penetrating way, the thrombus cutting piece is connected with the distal end of the guide wire body and is suitable for being placed in the sucking catheter, and the thrombus cutting piece is driven by the guide wire body to move in the sucking catheter to cut thrombus in the sucking catheter; wherein, the thrombus cutting member comprises a cutting portion, and the sectional area of the cutting portion is gradually increased along the direction from the distal end to the proximal end. Through being connected with thrombus cutting member at the seal wire body distal end, and thrombus cutting member includes cutting portion, along distal end to proximal end direction, cutting portion sectional area increases gradually, when placing thrombus cutting member and remove in order to cut the interior thrombus of aspiration catheter through the seal wire body, presents sharp point form cutting portion and can cut the breakage with the thrombus of jam in aspiration catheter, can avoid the inside jam that appears of aspiration catheter.

Description

Cutting guide wire and thrombus aspiration system

Technical Field

The utility model relates to the technical field of medical equipment, in particular to a cutting guide wire and a thrombus aspiration system.

Background

Thrombus aspiration is an effective method applied to clinic in recent years, and aims to rapidly withdraw thrombus blocking a lesion blood vessel through mechanical action, so that thrombus load and microvascular embolism can be reduced, coronary blood flow is changed, and the probability of occurrence of slow blood flow and no reflow after operation is reduced.

The thrombus aspiration catheter system in the prior art comprises a negative pressure aspiration pump, a thrombus aspiration catheter, an inner tube, a Y-shaped connector and a guide wire, wherein the guide wire is firstly fed into a lesion part of a human body when in use, then the thrombus aspiration catheter and the inner tube are inserted into the lesion part along the tail end of the ultra-smooth guide wire, the negative pressure aspiration pump is communicated with the thrombus aspiration catheter through the Y-shaped connector, the guide wire and the inner tube are withdrawn, then negative pressure is applied to the thrombus aspiration catheter through a negative pressure aspiration device, the end part of the catheter is aligned with thrombus, and the effect that the thrombus is withdrawn from the blood vessel through the thrombus aspiration catheter is achieved.

However, the above-described thrombus aspiration catheter system is capable of aspirating fresh, soft emboli and acute thrombus pieces, but is prone to tube blockage during aspiration of subacute thrombus, thereby affecting the aspiration of thrombus by the thrombus aspiration catheter.

Disclosure of Invention

Therefore, the technical problem to be solved by the utility model is that the thrombus aspiration catheter system in the prior art can aspirate fresh, soft emboli and acute thrombus blocks, but the subacute thrombus is easy to block the tube during aspiration, and the thrombus aspiration catheter can be influenced to aspirate the thrombus.

To this end, the utility model provides a cutting guide wire comprising:

the distal end of the guide wire body is suitable for being arranged in the suction catheter in a penetrating way;

a thrombus cutting member connected to the distal end of said guidewire body, said thrombus cutting member adapted to be placed within said aspiration catheter, said thrombus cutting member having a cutting condition for movement within said aspiration catheter under the drive of said guidewire body to cut a thrombus within said aspiration catheter;

wherein the thrombus cutting member comprises a cutting portion having a gradually increasing cross-sectional area in a distal to proximal direction.

Optionally, the side wall surface of the cutting part is a round table surface or a paraboloid.

Optionally, the peripheral surface of the cutting part is provided with a plurality of protruding parts and/or a plurality of recessed parts.

Optionally, the thrombus cutting member further comprises a connecting portion connected between the guidewire body and the cutting portion.

Optionally, the cross-sectional area of the connecting portion increases gradually in a proximal-to-distal direction.

Optionally, the connection part is in a truncated cone structure or a parabolic structure.

Optionally, the thrombus cutting member further comprises a screw portion, the screw portion is connected with the connecting portion, and the guide wire body is arranged in the screw portion in a penetrating mode.

Optionally, a knob device is connected with the proximal end of the guide wire body to drive the guide wire body to rotate.

A thrombus aspiration system comprising the cutting guide wire described above.

Optionally, the device further comprises a negative pressure piece, a connector, a cutting guide wire, a suction catheter and a catheter handle, wherein the connector is connected between the negative pressure piece and the suction catheter, the catheter handle is connected with the proximal end of the suction catheter, the cutting guide wire is suitable for being placed in the suction catheter, and a plurality of side holes are formed in the side wall of the distal end of the suction catheter.

The cutting guide wire and thrombus sucking system provided by the utility model has the following advantages:

1. the utility model provides a cutting guide wire, which comprises a guide wire body and a thrombus cutting piece, wherein the distal end of the guide wire body is suitable for being arranged in a suction catheter in a penetrating way, the thrombus cutting piece is connected with the distal end of the guide wire body and is suitable for being placed in the suction catheter, and the thrombus cutting piece is in a cutting state of moving in the suction catheter under the driving of the guide wire body so as to cut thrombus in the suction catheter; wherein the thrombus cutting member comprises a cutting portion having a gradually increasing cross-sectional area in a distal to proximal direction.

The cutting guide wire of this structure is through being in the guide wire body distal end is connected with thrombus cutting member, just thrombus cutting member includes cutting portion, along distal end to proximal direction, cutting portion sectional area increases gradually, is placing thrombus cutting member through the guide wire body and is in when removing in the suction catheter in order to cut thrombus in the suction catheter, presents sharp form cutting portion and can cut the breakage with the thrombus of jam in the suction catheter, can avoid the inside jam that appears of suction catheter.

2. The utility model provides a cutting guide wire, which further comprises a spiral part, wherein the spiral part is connected with the connecting part, and the guide wire body is arranged in the spiral part in a penetrating way.

The cutting guide wire of this structure is provided with spiral portion through on connecting portion, when the clearance thrombus, the whole thrombus cutting breakage that will insert in the thrombus of spiral portion, then when taking out the spiral portion from the thrombus, the spiral portion can take out broken thrombus from the thrombus piece, and then can improve the clearance effect of thrombus.

3. The thrombus aspiration system provided by the utility model further comprises a negative pressure piece, a connector, a cutting guide wire, an aspiration catheter and a catheter handle, wherein the connector is connected between the negative pressure piece and the aspiration catheter, the catheter handle is connected with the proximal end of the aspiration catheter, the cutting guide wire is suitable for being placed in the aspiration catheter, and a plurality of side holes are formed in the side wall of the distal end of the aspiration catheter.

The thrombus sucking system with the structure can remove thrombus on the inner side wall of a blood vessel by arranging a plurality of side holes on the side wall of the distal end of the sucking catheter. In addition, if one of the openings at the head end of the suction catheter or the side holes is blocked by thrombus, the other openings can continuously suck thrombus, the catheter does not need to be replaced, the thrombus is sucked rapidly and comprehensively, and the blood loss is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of the overall structure of a cutting wire and thrombus aspiration system provided in an embodiment of the present utility model;

FIG. 2 is a schematic view of a catheter handle in a cutting wire and thrombus aspiration system according to an embodiment of the present utility model;

FIG. 3 is a schematic view showing an exploded structure of a catheter handle in a cutting wire and a thrombus aspiration system according to an embodiment of the present utility model

FIG. 4 is a schematic view of the distal end structure of a cutting wire and thrombus aspiration system provided in an embodiment of the present utility model;

FIG. 5 is an exploded view of the distal structure of a cutting guidewire and thrombus aspiration system provided in an embodiment of the present utility model;

FIG. 6 is a schematic view of a cutting wire and a thrombus-cutter in a thrombus aspiration system according to an embodiment of the present utility model;

FIG. 7 is a schematic view of another embodiment of a cutting wire and a thrombus-cutting member of a thrombus aspiration system according to the present utility model;

reference numerals illustrate:

1. a guidewire body;

2. a thrombus cutting member; 21. a cutting section; 22. a connection part; 23. a spiral part;

3. a suction catheter; 31. a side hole;

4. a catheter handle;

5. a bushing;

6. and a protective sleeve.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

In the description of the present utility model, it should be noted that the distal end is the end near the thrombus cutting member and the proximal end is the end near the catheter handle.

Example 1

The present embodiment provides a cutting guide wire, as shown in fig. 1 to 7, comprising a guide wire body 1 and a thrombus cutting member 2, wherein the thrombus cutting member 2 is connected with the distal end of the guide wire body 1, the distal end of the guide wire body 1 and the thrombus cutting member 2 are used for being arranged in a suction catheter 3 in a penetrating manner, and the thrombus cutting member 2 is driven to move back and forth in the suction catheter 3 by the proximal end of the handheld guide wire body 1 so as to cut thrombus in the suction catheter 3, prevent the suction catheter 3 from being blocked, and influence the suction of the thrombus suction catheter 3 on thrombus.

As shown in fig. 6 and 7, the thrombus cutter 2 includes a cutting portion 21 and a connecting portion 22, the connecting portion 22 being connected between the guidewire body 1 and the cutting portion 21. Wherein, along the direction from the distal end to the proximal end, the sectional area of the cutting part 21 gradually increases, that is, the cutting part 21 has a truncated cone structure, a conical structure or a parabolic structure.

It will be appreciated that in other embodiments, the cutting portion 21 may have other tip-shaped structures, where the tip-shaped structures can be more easily inserted into the thrombus when the cutting portion 21 contacts the thrombus, and cut and break the thrombus.

It will be appreciated that in other embodiments, the surface of the cutting portion 21 may be provided with a plurality of projections which enhance the effect of cutting the thrombus, or a plurality of recesses may be provided.

As shown in fig. 6, the connecting portion 22 has a columnar shape, and the columnar structure can facilitate movement of the thrombus cutting member 2 within the thrombus.

In other embodiments, the cross-sectional area of the connecting portion 22 increases in a direction from the proximal end toward the distal end, i.e., the connecting portion 22 has a truncated cone or a parabolic shape.

In other embodiments, the thrombus cutting member 2 further comprises a screw portion 23, the screw portion 23 is fixedly connected with the connecting portion 22, the guide wire body 1 is arranged in the screw portion 23 in a penetrating manner, when a thrombus is cleaned, the screw portion 23 can be inserted into the thrombus to cut and break the thrombus, and then when the screw portion 23 is pulled away from the thrombus, the broken thrombus can be carried out from the thrombus block by the screw portion 23, so that the cleaning effect of the thrombus can be improved.

In other embodiments, a knob device is attached to the proximal end of the guidewire body 1, through which an operator can control the rotation of the guidewire body 1.

The guide wire body 1 is made of nickel-titanium alloy materials, and has good shape memory, and the surface of the distal end of the guide wire body 1 is provided with a hydrophilic coating, so that the guide wire body 1 has good operability.

In other embodiments, the guide wire body 1 and the thrombus cutting member 2 may be disposed at an included angle at the connection, that is, the axis of the guide wire body 1 forms an included angle with the axis of the thrombus cutting member 2, so that the curved thrombus cutting member 2 can break thrombus and simultaneously can be used for stripping thrombus from the vessel wall, which is more beneficial to thrombus aspiration.

Example 2

This embodiment provides a thrombus aspiration system, as shown in fig. 1 to 7, comprising an aspiration catheter 3, a catheter handle 4, a hub 5, a sheath tube 6 and a cutting guide wire, which is the cutting guide wire in embodiment 1.

As shown in fig. 2 and 3, the catheter handle 4 is inserted into the sheath tube 6, the sheath tube 6 is inserted into the suction catheter 3 through the bushing 5, the distal end of the cutting guide wire is inserted into the suction catheter 3, and the catheter handle 4 is used for controlling the catheter.

Wherein, as shown in fig. 4 and 5, the distal end of the aspiration catheter 3 is provided with a plurality of side holes 31, and by providing the side holes 31 on the side wall of the distal end of the aspiration catheter 3, thrombus on the inner side wall of the blood vessel can be removed by using the thrombus aspiration catheter 3 having a much smaller inner diameter than the blood vessel. In addition, if the head end opening of the suction catheter 3 or one of the side holes 31 is blocked by thrombus, the other openings can continue to suck thrombus, the catheter does not need to be replaced, the thrombus is sucked completely and rapidly, and the blood loss is reduced.

It will be appreciated that the number of side holes 31 may be determined according to the size of the aspiration catheter 3 or the use requirements, e.g. 2, 3, 5, 8, etc., preferably the side holes 31 are provided on different sides of the aspiration catheter 3 to achieve a greater range of aspiration thrombi.

Wherein, the suction catheter 3 adopts three-layer composite cladding technique, and the inlayer is the PTFE layer, and the resistance is little, is favorable to the thrombus to pass through, and the intermediate level is the stainless steel braided structure, and the supportability is strong, and the push nature is good to anti buckling, the skin is Pebax resin, and biocompatibility is good, and side opening 31 both ends area develop Marker point, can instruct side opening 31 position, and suction catheter 3's head end is provided with the head end development section, can instruct the head end position.

In other embodiments, the thrombus aspiration system further comprises a negative pressure member and a connector connected between the negative pressure member and the aspiration catheter 3, wherein the negative pressure member is a negative pressure aspiration pump, and the connector is a rotary or push type Y valve, which is effective to prevent blood leakage.

The thrombus aspiration system provided by this embodiment has the following working procedures:

firstly, a cutting guide wire enters a lesion part of a human body along a relevant instrument, then a suction catheter 3 is inserted into the lesion part along the tail end of the cutting guide wire, a negative pressure suction pump is connected with a side branch of a Y-shaped connector and screwed, the cutting guide wire is withdrawn, then the negative pressure suction pump is used for applying negative pressure, stabilizing pressure, slowly pushing and rotating the catheter after stabilizing the pressure, aligning the catheter side hole 31 with thrombus, extracting the thrombus from the blood vessel, cutting the thrombus by using the matched cutting guide wire when the thrombus is blocked, and cutting and sucking the thrombus.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.

Claims

1. A cutting guide wire, comprising:

a guide wire body (1), wherein the distal end of the guide wire body (1) is suitable for being arranged in the suction catheter (3) in a penetrating way;

a thrombus cutter (2) distally connected to said guidewire body (1), said thrombus cutter (2) being adapted to be placed within said aspiration catheter (3), said thrombus cutter (2) having a cutting condition for movement within said aspiration catheter (3) under the drive of said guidewire body (1) for cutting a thrombus within said aspiration catheter (3);

wherein the thrombus cutting member (2) comprises a cutting portion (21), the cutting portion (21) having a gradually increasing cross-sectional area in a distal to proximal direction.

2. Cutting guide wire according to claim 1, characterized in that the side wall surface of the cutting portion (21) is a rounded table or a paraboloid.

3. Cutting guide wire according to claim 1 or 2, characterized in that the peripheral side surface of the cutting portion (21) is provided with protrusions and/or recesses.

4. A cutting guide wire according to claim 3, characterized in that the thrombus cutting member (2) further comprises a connecting portion (22), the connecting portion (22) being connected between the guide wire body (1) and the cutting portion (21).

5. The cutting guide wire according to claim 4, wherein the connecting portion (22) has a gradually increasing cross-sectional area in a proximal-to-distal direction.

6. The cutting guide wire according to claim 5, wherein the connection (22) is of a truncated cone or parabolic configuration.

7. The cutting guide wire according to claim 4, wherein the thrombus cutting member (2) further comprises a screw portion (23), the screw portion (23) being connected to the connecting portion (22), the guide wire body (1) being threaded into the screw portion (23).

8. The cutting guide wire according to claim 7, further comprising a knob device coupled to the proximal end of the guide wire body (1) for driving the guide wire body (1) in rotation.

9. A thrombus aspiration system comprising the cutting guide wire of any one of claims 1-8.

10. The thrombus aspiration system according to claim 9, further comprising a negative pressure member, a connector connected between the negative pressure member and the aspiration catheter (3), a cutting guide wire adapted to be placed in the aspiration catheter (3), an aspiration catheter (3) and a catheter handle (4), the catheter handle (4) being connected to the proximal end of the aspiration catheter (3), the distal side wall of the aspiration catheter (3) being provided with a number of side holes (31).