CN212261449U

CN212261449U - Thrombus removing device

Info

Publication number: CN212261449U
Application number: CN202020769014.0U
Authority: CN
Inventors: 韩建超; 樊亚明; 史增佐; 朱清; 苗铮华
Original assignee: Shanghai Microport Endovascular Medtech Co Ltd
Current assignee: Shanghai Lanmai Medical Technology Co ltd; Shanghai Minimally Invasive Heart Pulse Medical Technology Group Co ltd
Priority date: 2020-05-11
Filing date: 2020-05-11
Publication date: 2021-01-01
Anticipated expiration: 2030-05-11

Abstract

The utility model provides a thrombus clearing device, which comprises a bolt taking component and a bolt breaking component, wherein the bolt breaking component comprises a sheath tube, a transmission tube, a bolt taking head and a driving piece, the distal end of the sheath tube is connected with the proximal end of the bolt taking head, the bolt taking head is a hollow structure with at least one bolt sucking hole on the side surface, a bolt breaking knife is arranged in the bolt taking head, the transmission tube extends into the bolt taking head along the inner cavity of the sheath tube, the distal end of the transmission tube is connected with the bolt breaking knife, the proximal end is connected with the driving piece, and the driving piece is used for driving the transmission tube to drive the bolt breaking knife to rotate; the bolt taking assembly comprises a filter screen and a first traction piece, the first traction piece penetrates through the transmission pipe and the bolt taking head in a movable mode, and the far end of the first traction piece extends out of the far end of the bolt taking head and is connected with the filter screen. The utility model discloses can effectively improve the clearance of thrombus to can effectively reduce the patient and take place the probability of complication such as hematuria and blood vessel perforation.

Description

Thrombus removing device

Technical Field

The utility model relates to the technical field of medical equipment, in particular to thrombus clearing device.

Background

Lower limb Deep Vein Thrombosis (DVT) is a disease caused by abnormal coagulation of blood in the deep veins of the lower limbs. DVT leads to increased venous pressure, impeded blood return, swelling, pain and dysfunction of the lower extremities, with the risk of thrombus loss, which, following impingement of blood flow on the pulmonary artery, can cause Pulmonary Embolism (PE). DVT, if not effectively treated in the acute phase, is thrombotic, venous obstruction, loss of valve function, venous reflux and venous hypertension, post-thrombotic syndrome (PTS), endangers limb survival and life threatening safety.

Traditional surgical embolectomy is suitable for patients with severe clinical symptoms of DVT who cannot use thrombolytic drugs. Its disadvantages are: the vein incision and thrombus removal is invasive operation and is not suitable for patients with poor general conditions; embolectomy can disrupt valve function; residual thrombus exists, and further thrombolysis and anticoagulation are easy to cause wound complications.

With the development of technology, mechanical thrombus removal (PMT) devices have emerged in recent years. PMT is the intracavitary thrombus clearing device of microtrauma, can clear away the thrombus fast, resumes blood flow, saves valve function.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is that the thrombus that exists takes out the effect among the current thrombus clearing device is poor, complication such as hematuria, blood vessel perforation appear easily.

In order to solve the technical problem, the utility model provides a thrombus clearing device, which comprises a thrombus taking assembly and a thrombus crushing assembly;

the bolt breaking assembly comprises a sheath tube, a transmission tube, a bolt taking head and a driving piece, wherein the far end of the sheath tube is connected with the near end of the bolt taking head, the bolt taking head is of a hollow structure, the side surface of the bolt taking head is provided with at least one bolt sucking hole, a bolt breaking cutter is arranged in the bolt taking head, the transmission tube extends into the bolt taking head along the inner cavity of the sheath tube, the far end of the transmission tube is connected with the bolt breaking cutter, the near end of the transmission tube is connected with the driving piece, and the driving piece is used for driving the transmission tube to drive the bolt breaking cutter to rotate;

the bolt taking assembly comprises a filter screen and a first traction piece, the first traction piece is movably arranged in the transmission pipe and the bolt taking head in a penetrating mode, and the far end of the first traction piece extends out of the far end of the bolt taking head and is connected with the filter screen.

Optionally, the filter screen comprises a proximal end and a distal end, and the distal end of the filter screen is connected with the distal end of the first traction element;

the filter screen has the constraint state and release state under release state, the near-end of filter screen is the opening form, the distal end of filter screen is closed form.

Optionally, the thrombus removal device further comprises a recovery sheath and a second traction member, the first traction member is tubular, the second traction member is movably inserted into the lumen of the first traction member, and the distal end of the second traction member passes through the distal end of the first traction member and is connected with the recovery sheath;

the recovery sheath is used for accommodating the filter screen in a bound state, when the second traction piece is controlled to move towards the far end, the second traction piece drives the recovery sheath to move towards the far end, and the filter screen is converted into the release state from the bound state.

Optionally, the thrombus removal device further comprises a first slider, and the first slider is connected with the proximal end of the first traction member.

Optionally, the thrombus removal device further comprises a sheath tube connector, wherein the sheath tube connector is sleeved outside the transmission tube and is connected with the proximal end of the sheath tube.

Optionally, the thrombus removal device further comprises a suction piece, a suction hole is formed in the side face of the sheath tube connecting piece, and the suction piece is communicated with the inner cavity of the sheath tube connecting piece through the suction hole.

Optionally, the suction piece is a negative pressure pump or a syringe.

Optionally, the proximal end of the sheath tube connector is provided with a first fixing structure and a first sealing structure which are matched with each other.

Optionally, the thrombus removal device further comprises a second slider, and the second slider is connected with the proximal end of the second traction element.

Optionally, the thrombus removal device further comprises a transmission tube connector, the proximal end of the transmission tube extends into the transmission tube connector, and the proximal end of the first traction piece is penetrated out from the proximal end of the transmission tube connector.

Optionally, the distal end of transmission union coupling spare is equipped with second fixed knot and second seal structure, the near-end of transmission union coupling spare is equipped with locking structure and third seal structure, be provided with the seal wire chamber in the transmission union coupling spare, the seal wire chamber link up the transmission union coupling spare and with the transmission pipe is linked together, first pull the piece and follow the seal wire chamber extends and follows the near-end in seal wire chamber is worn out.

Optionally, the distal end of the bolt taking head is of a conical curved surface structure.

Optionally, the bolt breaking knife comprises at least one blade, and the position of the blade corresponds to the position of the bolt sucking hole.

Compared with the prior art, the thrombus removal device provided by the utility model comprises a thrombus taking assembly and a thrombus breaking assembly, wherein the thrombus breaking assembly comprises a sheath tube, a transmission tube, a thrombus taking head and a driving piece, the distal end of the sheath tube is connected with the proximal end of the thrombus taking head, the thrombus taking head is a hollow structure with at least one thrombus absorbing hole on the side surface, a thrombus breaking knife is arranged in the thrombus taking head, the transmission tube extends into the thrombus taking head along the inner cavity of the sheath tube, the distal end of the transmission tube is connected with the thrombus breaking knife, the proximal end of the transmission tube is connected with the driving piece, and the driving piece is used for driving the transmission tube to drive the thrombus breaking knife to rotate; the bolt taking assembly comprises a filter screen and a first traction piece, the first traction piece is movably arranged in the transmission pipe and the bolt taking head in a penetrating mode, and the far end of the first traction piece extends out of the far end of the bolt taking head and is connected with the filter screen. Therefore, the thrombus can be peeled off from the vascular wall through the filter screen, and then the thrombus is crushed and discharged to the outside of the body under the action of the thrombus crushing component, so that the clearance rate of the thrombus is effectively improved; meanwhile, the filter screen also has a protection effect, and can effectively prevent embolism caused by drift of massive thrombus. In addition, the first traction piece is movably arranged in the transmission tube and the embolectomy head in a penetrating mode, so that the filter screen moves towards the position of the embolectomy head by pulling the first traction piece in the operation process of removing thrombus, and the embolectomy head can be arranged in the filter screen, so that the blood vessel wall can be effectively prevented from being damaged by the embolectomy head, and the probability of complications such as hematuria and blood vessel perforation of a patient is reduced.

Drawings

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

fig. 2 is a schematic structural view of a bolt head according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view of the tap head shown in FIG. 2;

fig. 4 is a schematic structural view of a cork breaking knife according to an embodiment of the present invention;

fig. 5 is a cross-sectional view of a sheath connector according to an embodiment of the present invention;

FIG. 6 is a cross-sectional view of a drive tube coupling according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a driving member according to an embodiment of the present invention;

fig. 8 is a schematic structural view of a driving member according to another embodiment of the present invention;

FIG. 9 is a schematic view of a thrombus removal device in an initial state according to another embodiment of the present invention;

FIG. 10 is a schematic view of the thrombectomy device of FIG. 9 after the filter mesh and the retrieval sheath have passed over the lesion;

FIG. 11 is a schematic view of the thrombus removal device of FIG. 9 after deployment of the filter screen;

FIG. 12 is a schematic structural view of the thrombus removal device shown in FIG. 9 when removing a thrombus.

Wherein the reference numbers are as follows:

a filter screen-1010; a first pulling member-1020; a first slider-1030; taking a bolt head-1040; sheath-1050; sheath connector-1060; a drive tube-1070; drive-1080; drive line connection-1090; a plug crushing knife-1100; sheath-1110 is recovered; 1120-a second traction member; 1130 a second slide; a first securing structure-1061; a first seal structure-1062; a second fixed structure-1093; a suction hole-1063; a second sealing structure-1094; locking structure-1091; a third seal structure-1092; a plug hole-1041; a blade-1101; rotary motor-1081; a first gear-1082; second gear-1083.

Detailed Description

The thrombus removal device according to the present invention will be described in further detail with reference to fig. 1 to 12 and the embodiments. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention. To make the objects, features and advantages of the present invention more comprehensible, please refer to the attached drawings. It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limitation of the implementation of the present invention, so that the present invention does not have the essential significance in the technology, and any modification of the structure, change of the ratio relationship or adjustment of the size should still fall within the scope of the technical content disclosed in the present invention without affecting the function and the achievable purpose of the present invention.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The definitions of "proximal" and "distal" herein are: "distal" generally refers to the end of the medical device that first enters the patient during normal operation, while "proximal" generally refers to the end of the medical device that is near the operator during normal operation.

An object of the utility model is to provide a thrombus clearing device to the thrombus that exists takes out the effect poor among the current thrombus clearing device of solution, appears the problem of complication such as hematuria, blood vessel perforation easily.

To achieve the above object, the present invention provides a thrombus removing device, please refer to fig. 1, which schematically shows a schematic structural diagram of the thrombus removing device according to an embodiment of the present invention, as shown in fig. 1, the thrombus removing device includes a bolt taking assembly and a bolt breaking assembly.

The bolt assembly includes a sheath 1050, a drive tube 1070, a bolt head 1040, and a drive member 1080. Referring to fig. 2 and 3, the distal end of the sheath 1050 is connected to the proximal end of the embolectomy head 1040. The bolt taking head 1040 is a hollow structure with at least one bolt sucking hole 1041 on the side surface, and a bolt crushing knife 1100 is arranged in the bolt taking head 1040. The drive tube 1070 extends along the lumen of the sheath 1050 into the embolectomy head 1040, the distal end of the drive tube 1070 being connected to the embolectomy knife 1100, and the proximal end of the drive tube 1070 being connected to the drive member 1080. The drive 1080 is used to drive the drive tube 1070 to rotate the shear bolt 1100. Thrombus can enter the interior of the thrombus taking head 1040 through the thrombus suction holes 1041 on the side surface of the thrombus taking head 1040, and under the action of the driving piece 1080, the driving tube 1070 rotates and drives the thrombus breaking knife 1100 to rotate, so that thrombus sucked into the thrombus taking head 1040 is broken.

The embolectomy assembly includes a screen 1010 and a first pull member 1020. The first pulling member 1020 is movably disposed through the driving tube 1070 and the bolt head 1040, and the distal end of the first pulling member 1020 extends from the distal end of the bolt head 1040 and is connected to the screen 1010. The utility model provides a thrombus clearing device includes filter screen 1010, through filter screen 1010 can peel off old thrombus from the vascular wall, then smashes the thrombus and discharges extracorporeally under the effect of garrulous subassembly of tying, has effectively improved the clearance of thrombus. Meanwhile, the filter screen 1010 also has a protection effect, and can effectively prevent the drift of massive thrombus.

The sheath 1050 is a single-layer tube or a multi-layer composite tube, and has at least one hollow channel, and when the sheath 1050 is a multi-layer composite tube, the layer structure thereof includes a metal braid.

The driving tube 1070 is a hollow tubular structure such that the first pulling member 1020 is movably disposed through the driving tube 1070 and the bolt head 1040. Since the first pulling element 1020 is movably disposed through the transmission tube 1070 and the thrombus extraction head 1040, the filter screen 1010 can be driven to move towards the proximal end by pulling the first pulling element 1020 towards the proximal end during the thrombus removing operation, so that the filter screen 1010 can smoothly separate thrombus adhered to the blood vessel wall into the filter screen 1010. In addition, the filter screen 1010 can be moved towards the position of the embolectomy head 1040 by pulling the first traction piece 1020, so that the embolectomy head 1040 can be placed inside the filter screen 1010, the vascular wall can be effectively prevented from being damaged by the embolectomy head 1040, and the probability of complications such as hematuria and vascular perforation of a patient is reduced.

Preferably, as shown in FIG. 1, the thrombectomy device further comprises a first block 1030, wherein the first block 1030 is connected to the proximal end of the first traction member 1020. Thus, by providing a first slider 1030 and attaching the first slider 1030 to the proximal end of the first pulling member 1020, the first pulling member 1020 and, therefore, the screen 1010, can be pulled proximally by the first slider 1030. Thrombus adhering to the vessel wall can be detached by pulling the proximal end of the screen 1010 and collected into the interior of the screen 1010.

Preferably, as shown in fig. 1, the screen 1010 includes a proximal end and a distal end, and the distal end of the screen 1010 is fixedly connected to the distal end of the first pulling member 1020, for example, the distal end of the screen 1010 is fixed to the distal end of the first pulling member 1020 by means of a ligature. Because the distal end of first traction piece 1020 with the distal end of filter screen 1010 links to each other, not only can be more convenient for first traction piece 1020 with be connected between the filter screen 1010, also can ensure simultaneously through to the near-end pulling first traction piece 1020 so that filter screen 1010 orientation the in-process that gets the position removal of bolt head 1040, filter screen 1010 can remove along its axis direction, and then further improves the thrombus removal effect of the utility model.

Specifically, the screen 1010 has two states, a bound state and a released state. In the restrained state, the proximal and distal ends of the screen 1010 are both closed, while in the released state, the proximal end of the screen 1010 is open and the distal end of the screen 1010 is closed. The screen 1010 is in a restrained state to facilitate puncturing of a blood vessel and placement of the screen 1010 in the blood vessel during a surgical procedure. After the screen 1010 is placed in a blood vessel, the screen 1010 may be converted to a release state. In the release state, because the near-end of filter screen 1010 is the opening form, the distal end of filter screen 1010 is closed form to can separate the thrombus that adheres to the vascular wall to the inside of filter screen 1010, and can effectively prevent the drift of bold thrombus.

In use, the screen 1010 may be first placed within a delivery device, such as a delivery sheath, with the screen 1010 in a restrained state within the delivery device. During the procedure, the blood vessel is punctured and the thrombus removal device is positioned along the delivery device to the site of the lesion (thrombus). In one embodiment, the screen 1010 can automatically spring open to transition from the restrained state to the released state to cover the vessel wall when the delivery device is withdrawn, which is a simple operation.

Further, the screen 1010 may be woven from at least one filament or laser engraved. The material of the filter screen 1010 is preferably a shape memory material, the shape memory material may be selected from one or a combination of more of a metal material and a polymer material, and the metal is preferably a nickel-titanium alloy.

Preferably, in order to recover the filter screen 1010 after removing thrombus, the thrombus removal device is modified as follows. Specifically, referring to fig. 9-12, the thrombectomy device further comprises a retrieval sheath 1110 and a second retractor 1120. The first pulling member 1020 is tubular, the second pulling member 1120 is movably disposed in the lumen of the first pulling member 1020, and the distal end of the second pulling member 1120 extends out of the distal end of the first pulling member 1020 and is connected to the recovery sheath 1110. The recycling sheath 1110 is used to house the filter screen 1010 in a restrained state. In the initial state, the strainer 1010 is constrained in the recovery sheath 1110, and when the second pulling member 1120 is controlled to move distally, the second pulling member 1120 drives the recovery sheath 1110 to move distally to separate the recovery sheath 1110 from the strainer 1010, and the strainer 1010 is transformed from the constrained state to the released state. After the thrombus is cleared, the second pulling member 1120 can be controlled to move proximally to enable the filter screen 1010 to be accommodated in the recovery sheath 1110 again, and the filter screen 1010 is converted from the release state to the constraint state, so that the filter screen 1010 is recovered, and the filter screen 1010 is conveniently withdrawn from the body.

In this embodiment, the first pulling member 1020 may be a single-layer tube or a multi-layer composite tube, so that the second pulling member may be inserted into the lumen of the first pulling member. The second traction piece 1120 can be a single-layer pipe or a multilayer composite pipe, and also can be a traction wire, and the utility model discloses do not limit to this. Preferably, the second traction member 1120 is a single-layer tube or a multi-layer composite tube, so that a surgical guide wire can be inserted into the lumen of the second traction member 1120 during a surgical procedure. The recovery sheath 1110 is a single layer of tubing or a multi-layer composite of tubing so that the screen can be constrained within the lumen of the recovery sheath 1110.

Further, the thrombus removal device further comprises a second block 1130, wherein the second block 1130 is connected to the proximal end of the second traction element 1120. A through hole is formed in the first slider 1030, and the second traction member 1120 is movably inserted into the through hole of the first slider 1030. Specifically, as shown in fig. 9-12, the proximal end of the second pulling member 1120 extends out of the proximal ends of the first pulling member 1020 and the first slider 1030, and is connected to the second slider 1130 after extending a certain distance. The second block 1130 is connected to a proximal end of the second pulling member 1120, such that the second pulling member 1120 can be controlled to move by moving the second block 1130. Referring to fig. 10 and 11, in the state shown in fig. 10, when the second sliding block 1130 is pushed to the far end, the second pulling member 1120 moves to the far end, and further drives the recovery sheath 1110 to move to the far end, so that the filter screen 1010 is exposed from the recovery sheath 1110, and the filter screen 1010 automatically pops open immediately, as shown in fig. 11, and is converted from the bound state to the released state, so as to cover the blood vessel wall. In addition, in the state shown in fig. 11, when the second slider 1130 is pulled proximally, the second pulling member 1120 moves proximally, and the filter screen 1010 is accommodated in the recovery sheath 1110 again, and the filter screen 1010 is changed from the released state to the bound state as shown in fig. 11.

Referring to fig. 4, a schematic structural diagram of a cork breaking cutter 1100 according to an embodiment of the present invention is schematically shown. As shown in fig. 4, the latch breaking blade 1100 is a tubular hollow structure, and preferably, the latch breaking blade 1100 includes at least one blade 1101, the latch breaking blade 1100 is located inside the latch taking head 1040, and the position of the blade 1101 corresponds to the position of the latch sucking hole 1041. The thrombus breaking process is carried out in the thrombus taking head 1040, so that the damage to cells in blood can be effectively avoided, and the probability of complications such as hematuria and the like of a patient is greatly reduced. In addition, the thrombus cutter 1100 is positioned inside the thrombus extraction head 1040, so that the incidence rate of complications such as vascular perforation can be effectively reduced.

As shown in fig. 1, the thrombus removal device further comprises a sheath connector 1060, wherein the sheath connector 1060 is sleeved outside the transmission tube 1070 and connected with the proximal end of the sheath 1050. Referring to fig. 5, fig. 5 schematically shows a structural diagram of a sheath connector 1060 according to an embodiment of the present invention. Preferably, as shown in fig. 1 and 5, the proximal end of the sheath connector 1060 is provided with a first fixing structure 1061 and a first sealing structure 1062 which are matched with each other. Thus, by providing the first fixing structure 1061 and the first sealing structure 1062 at the proximal end of the sheath connector 1060, the driving tube 1070 extending through the sheath connector 1060 can be stably fixed to the sheath connector 1060 by the cooperation of the first fixing structure 1061 and the first sealing structure 1062, and the sealing performance of the cavity formed between the driving tube 1070 and the sheath connector 1060 can also be improved.

Further, the first fixing structure 1061 may be a fixing cap, and the first sealing structure 1062 may be a sealing ring. It should be noted that, as can be understood by those skilled in the art, in other embodiments, the first fixing structure 1061 may also be other structures capable of performing a fixing function besides the fixing cap, and the first sealing structure 1062 may also be other structures capable of performing a sealing function besides the sealing ring, which is not limited by the present invention.

Preferably, as shown in fig. 5, a suction hole 1063 is formed in a side surface of the sheath connector 1060, and the thrombus removing device further includes a suction member which is communicated with the inner cavity of the sheath connector 1060 through the suction hole 1063. Thus, by providing the suction hole 1063 at the side of the sheath coupling element 1060, the connection between the suction element and the sheath coupling element 1060 can be more facilitated. During operation, the suction member can provide negative pressure, so that thrombus can be sucked into the thrombus taking head 1040 more conveniently under the suction of the negative pressure, thereby facilitating thrombus fragmentation by the thrombus crushing cutter 1100, and the negative pressure provided by the suction member can suck the crushed thrombus out of the body. The utility model provides a thrombus clearing device inhales the thrombus through the negative pressure that the suction piece formed and gets in the bolt head 1040, and the thrombus in the bolt head 1040 is got to the suction to rethread garrulous bolt sword 1100 cuts. Compare in the thrombus suction catheter near the high-speed rotatory negative pressure that forms through helical structure among the prior art will be located near pipe side, then carry out the mode of cutting to inspiratory thrombus through the cooperation of this helical structure and pipe side opening, the utility model provides a thrombus clearing device can further improve the clearance of thrombus, also can effectively avoid the incidence of complications such as vascular perforation simultaneously.

Preferably, the suction member may be a negative pressure pump or a syringe. As shown in figure 5, the suction piece is an injector, because the injector has simple structure and low cost and is easy to operate, therefore, the utility model can further simplify the overall structure and the production cost of the thrombus removing device, and is convenient to operate simultaneously. It should be noted that, as will be understood by those skilled in the art, in other embodiments, the suction member may also be other structures capable of generating negative pressure by suction, and the present invention is not limited thereto.

Preferably, as shown in fig. 1, the thrombectomy device further comprises an actuation tube connector 1090, wherein a proximal end of the actuation tube 1070 extends into the actuation tube connector 1090, and a proximal end of the first pulling member 1020 extends out of the proximal end of the actuation tube connector 1090. Thus, by providing a drive tube connector 1090, it may be more convenient to movably pass the first pulling member 1020 through the drive tube 1070.

Referring to fig. 6, a schematic structural diagram of a transmission pipe connector 1090 according to an embodiment of the present invention is shown. Preferably, as shown in FIG. 6, the distal end of the drive tube coupler 1090 is provided with a second securing structure 1093 and a second sealing structure 1094, and the proximal end of the drive tube coupler 1090 is provided with a locking structure 1091 and a third sealing structure 1092. Be provided with the seal wire chamber in the transmission union coupling 1090, the seal wire chamber link up transmission union coupling 1090 and with transmission pipe 1070 is linked together, first traction piece 1020 is followed the seal wire chamber extends and follows the near-end in seal wire chamber is worn out. By providing second securing structure 1093 and second sealing structure 1094 at the distal end of drive tube attachment 1090, the stability and sealing of drive tube 1070 extending and being secured within drive tube attachment 1090 is ensured. By providing a locking structure 1091 and a third sealing structure 1092 at the proximal end of the drive tube coupler 1090, the stability and sealing of the first puller member 1020 in the drive tube coupler 1090 is ensured. In addition, the proximal end of the locking structure 1091 is provided with a guidewire hole, the guidewire hole is communicated with the guidewire cavity, and the first pulling member 1020 extends along the guidewire cavity and penetrates out of the guidewire hole. The closing or opening of the guide wire hole is adjusted by controlling the tightening or loosening of the locking structure 1091, when the locking structure 1091 is tightened, the guide wire hole is closed, and the first pulling piece 1020 cannot be pulled; when the locking structure 1091 is released, the guide wire hole is opened, and the first pulling member 1020 can be accessed, i.e., the first pulling member 1020 can be pulled.

Preferably, the locking structure 1091 is threadably coupled to the proximal end of the drive tube coupler 1090. From this, through with locking structure 1091 with connect through the screw thread between the driving pipe connector 1090, not only can practice thrift the part kind, simplify the utility model provides a thrombus clearing device's overall structure, also be convenient for more simultaneously locking structure 1091 screws up or unclamps.

Further, the second fixing structure 1093 may be a fixing cap, the second sealing structure 1094 may be a sealing ring, the locking structure 1091 may be a locking cap, and the third sealing structure 1092 may be a sealing ring. It should be noted that, as can be understood by those skilled in the art, in other embodiments, the second fixing structure 1093 may also be a structure capable of fixing other than a fixing cap, the second sealing structure 1094 may also be a structure capable of sealing other than a sealing ring, the locking structure 1091 may also be a structure capable of locking other than a locking cap, and the third sealing structure 1092 may also be a structure capable of sealing other than a sealing ring, which is not limited by the present invention.

Referring to fig. 7, a schematic structural diagram of a driving member 1080 provided in an embodiment of the present invention is schematically shown. Preferably, as shown in fig. 7, the driving member 1080 is a hollow shaft motor, the hollow shaft motor is installed outside the driving tube 1070, and the hollow shaft motor uses the driving tube 1070 as a rotating shaft, when the hollow shaft motor operates, the driving tube 1070 is driven to rotate, and the thrombus cutter 1100 fixed at the distal end of the driving tube 1070 is further driven to rotate, so as to perform thrombus fragmentation on thrombus which has entered the thrombus taking head 1040 and is located around the thrombus cutter 1100.

Referring to fig. 8, a schematic structural diagram of a driving member 1080 provided in another embodiment of the present invention is schematically shown. Preferably, as shown in fig. 8, the driving member 1080 includes a motor 1081, a first gear 1082 and a second gear 1083, the first gear 1082 is mounted outside the transmission pipe 1070 (corresponding to the transmission pipe 1070 serving as the shaft of the first gear 1082) and is engaged with the second gear 1083, and the second gear 1083 is mounted on the output shaft of the motor 1081. When the motor 1081 works, the output shaft rotates to drive the second gear 1083 to rotate, and due to the engagement between the first gear 1082 and the second gear 1083, the first gear 1082 also rotates under the transmission action of the second gear 1083, so as to drive the transmission tube 1070 to rotate, thereby driving the deadbolt knife 1100 fixed at the distal end of the transmission tube 1070 to rotate, and performing deadbolt breaking on the thrombus which has entered the bolt taking head 1040 and is located around the deadbolt knife 1100.

It should be noted that, as will be understood by those skilled in the art, in other embodiments, the driving member 1080 may be configured to perform a rotation driving function other than the above two embodiments, and the present invention is not limited thereto.

When preparing each part of the thrombus removal device provided by the embodiment, each part can be prepared by machining, injection molding (extrusion) molding, laser engraving, weaving and/or forging molding and other processing methods; the different parts can be connected by laser welding or glue bonding. For example: the thrombectomy knife 1100 may be mounted at the distal end of the driving tube 1070 by laser welding and then mounted within the head 1040, with the proximal end of the head 1040 bonded to the distal end of the sheath 1050 by glue; the proximal end of the sheath 1050 is fixed to the distal end of the sheath connector 1060 by glue; the far end of the filter screen 1010 is fixed at the far end of the first traction piece 1020 in a binding mode; the proximal end of the first pulling member 1020 is fixed to the first slider 1030 by gluing. The first pulling member 1020, the bolt taking head 1040, the bolt breaking knife 1100 and the transmission pipe 1070 can be made of sintered ceramic, metal ceramic or titanium alloy, stainless steel, tungsten steel and other metal materials.

In order to facilitate understanding of the thrombus removal device provided in this embodiment, the following first describes in detail an application process of the thrombus removal device provided in the present invention with reference to fig. 1, and the specific process is as follows:

before the operation is started, the thrombus taking head 1040 in the thrombus removing device is placed in physiological saline, a suction piece (a syringe) is used for communicating with a suction hole 1063 on the side surface of the sheath tube connecting piece 1060, the suction is started until the physiological saline is visible in the suction piece, the suction is stopped, and the air in the thrombus removing device is emptied.

In the operation process, puncture the blood vessel, position the thrombus clearing device to the pathological change (thrombus) position along the delivery device such as delivery sheath, withdraw the delivery sheath, the filter screen 1010 will pop open and cover the blood vessel wall automatically, withdraw the delivery sheath continuously, expose get and tie the side hole 1041 on getting the bolt head 1040, start the driving piece 1080 that connects on the driving tube 1070 in order to drive the rotation of broken embolus sword 1100, and the synchronous suction is connected on the suction hole 1063 of sheath pipe connecting piece 1060 side the suction piece (syringe), under the suction of negative pressure, the thrombus is attracted to get and tie the side hole 1041 department on getting the bolt head, the cutting to the thrombus is realized jointly to the blade 1101 of pivoted broken embolus sword 1100 and the relative stationary side hole 1041 that gets, then through the negative pressure that the suction piece (syringe) provided outside will cut up the thrombus suction. In the operation process, the filter screen 1010 can be pulled towards the near end through the first sliding block 1030, thrombus adhered to the blood vessel wall can be separated to the inside of the filter screen 1010 through the near end of the filter screen 1010, the thrombus taking head 1040 is placed in the filter screen 1010, and suction is continued, so that thrombus taking efficiency is improved, and damage to the blood vessel wall caused by the thrombus taking head 1040 can be effectively reduced due to the fact that the filter screen 1010 is arranged outside the thrombus taking head 1040.

On the basis of the above application process, the thrombus removal device shown in fig. 9-12 further comprises a process of releasing and recovering the filter screen 1010 during application, which is specifically as follows:

during the operation, the thrombus removal device is positioned along a delivery device such as a delivery sheath to the lesion (thrombus) site, and the delivery sheath is withdrawn to expose the thrombus removal side hole 1041 on the thrombus removal head 1040, while the filter screen 1010 is still retained in the recovery sheath 1110, as shown in fig. 9. The first sled 1030 is then pushed so that the screen 1010, along with the retrieval sheath 1110, passes over the lesion and into the condition shown in fig. 10. The second sled 1130 is then pushed, at which time the screen 1010 remains in place and the retrieval sheath 1110 continues to move distally, thereby disengaging the screen 1010 from the retrieval sheath 1110, such that the screen 1010 unfolds into a released state and covers the vessel wall, i.e., into the state shown in fig. 11. Then, the first slider 1030 and the second slider 1130 are pulled proximally again, and the filter screen 1010 and the recovery sheath 1110 are moved proximally, so that the thrombus adhered to the blood vessel wall is separated by the proximal end of the filter screen 1010 into the inside of the filter screen 1010, and the thrombus extraction head 1040 is placed inside the filter screen 1010 to perform thrombus crushing and extraction, that is, the state shown in fig. 11. Finally, after the removal of the embolus is complete, the second slider 1130 may be pulled proximally to retrieve the screen 1010 into the retrieval sheath 1110 and withdrawn from the body.

The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims. It will be apparent to those skilled in the art that various changes and modifications may be made to the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A thrombus removal device is characterized by comprising a thrombus taking assembly and a thrombus crushing assembly;

2. The thrombectomy device of claim 1, wherein said filter screen comprises a proximal end and a distal end, said distal end of said filter screen being coupled to said distal end of said first traction element;

3. The thrombectomy device of claim 2, further comprising a retrieval sheath and a second retractor member, wherein said first retractor member is tubular, said second retractor member is movably disposed within the lumen of said first retractor member, and the distal end of said second retractor member extends out of the distal end of said first retractor member and is connected to said retrieval sheath;

4. The thrombectomy device of claim 1, further comprising a first slider coupled to the proximal end of the first traction member.

5. The thrombectomy device of claim 1, further comprising a sheath connector disposed outside the tube and coupled to the proximal end of the sheath.

6. The thrombus removal device according to claim 5, further comprising a suction member, wherein a side surface of the sheath tube connector is provided with a suction hole, and the suction member is communicated with the lumen of the sheath tube connector through the suction hole.

7. The thrombectomy device of claim 6, wherein said aspiration member is a negative pressure pump or a syringe.

8. The thrombectomy device of claim 5, wherein the proximal end of said sheath connector is configured with a first fixation structure and a first sealing structure that cooperate with each other.

9. The thrombectomy device of claim 3, further comprising a second slider, said second slider being attached to a proximal end of said second traction element.

10. The thrombectomy device of claim 1, further comprising a drive tube connector, wherein the proximal end of said drive tube extends into said drive tube connector, and wherein the proximal end of said first traction element extends out of the proximal end of said drive tube connector.

11. The thrombus removal device according to claim 10, wherein the distal end of the transmission tube connector is provided with a second fixing structure and a second sealing structure, the proximal end of the transmission tube connector is provided with a locking structure and a third sealing structure, a guide wire cavity is provided in the transmission tube connector, the guide wire cavity penetrates through the transmission tube connector and is communicated with the transmission tube, and the first traction member extends along the guide wire cavity and penetrates out from the proximal end of the guide wire cavity.

12. The thrombectomy device of claim 1, wherein the distal end of said thrombectomy head is configured with a conical curvature.

13. The thrombus removal device of claim 1, wherein the thrombogenic blades comprise at least one blade, the position of the blade corresponding to the position of the thrombus-aspiration hole.