CN116172660A

CN116172660A - Mechanical thrombus taking support, operating handle and thrombus taking device

Info

Publication number: CN116172660A
Application number: CN202310474474.9A
Authority: CN
Inventors: 郑殿会; 张玉龙; 于明
Original assignee: Beijing Xinyou Medical Technology Co ltd
Current assignee: Beijing Xinyou Medical Technology Co ltd
Priority date: 2023-04-28
Filing date: 2023-04-28
Publication date: 2023-05-30
Anticipated expiration: 2043-04-28
Also published as: CN116172660B

Abstract

The invention provides a mechanical bolt taking support, an operating handle and a bolt taking device, and relates to the technical field of medical equipment; the filter plug assembly comprises an inner catheter and a filter plug net, wherein the filter plug net is provided with a beam port at the far end and an opening at the near end, and the near end is connected with the inner catheter; the bolt cutting assembly comprises a middle guide pipe, an outer guide pipe and a bolt cutting net; the middle guide pipe is sleeved outside the inner guide pipe and is positioned at the proximal end side of the filter plug net; the bolt cutting net and the outer catheter are sleeved outside the middle catheter, the distal end of the bolt cutting net is converged at the distal end of the middle catheter, and the proximal end of the bolt cutting net is converged at the distal end of the outer catheter; the outer catheter and the middle catheter can slide back and forth, so that the radial contraction or expansion of the thrombolytic mesh is controlled, and the maximum outer diameter of the thrombolytic mesh in a radial expansion state is controlled. The operating handle is used for being assembled with the operating handle to form the mechanical thrombus removing device. The invention relieves the technical problems that the existing mechanical thrombus removing device is not thorough in thrombus removal, has poor adaptability to blood vessels and is easy to damage the blood vessel walls.

Description

Mechanical thrombus taking support, operating handle and thrombus taking device

Technical Field

The invention relates to the technical field of medical instruments, in particular to a mechanical thrombus taking support, an operating handle and a thrombus taking device.

Background

Thrombosis refers to the occurrence of abnormal blood clots in circulating blood due to certain causes of blood-borne components during survival of humans or animals, or the occurrence of blood deposits on the inner wall of the heart or blood vessel walls, which are extremely harmful to humans. Arterial and venous thrombolysis is a conventional method for treating acute ischemic stroke, but the method has high requirements on a treatment time window, patients are strictly required to receive treatment within 4 to 5 hours from the onset of the disease, and the short thrombolysis time window can lead only less than 10 percent of patients to obtain effective thrombolysis treatment, and has various limitations on the selection of the patients.

The mechanical thrombus taking device has positive curative effects on the treatment of most patients, but medical workers also find that the mechanical thrombus taking device used at present has the general problem of incomplete removal of thrombus, especially activated coanda thrombus; in addition, the existing mechanical thrombus removing device has poor adaptability to blood vessels and is easy to damage the walls of the blood vessels.

Disclosure of Invention

The invention aims to provide a mechanical thrombus removing bracket, an operating handle and a thrombus removing device, so as to solve the technical problems that the existing mechanical thrombus removing device is not thorough in thrombus removal, has poor adaptability to blood vessels and is easy to damage the blood vessel walls.

In order to achieve the above purpose, the embodiment of the present invention adopts the following technical scheme:

in a first aspect, embodiments of the present invention provide a mechanical thrombolytic stent comprising a filter plug assembly and a thrombolytic assembly; specifically, the filter plug assembly comprises an inner catheter and a filter plug net, wherein the filter plug net is provided with a distal end opening at the proximal end of a beam port, and the proximal end of the filter plug net is connected with the peripheral wall of the inner catheter; the bolt cutting assembly comprises a middle guide pipe, an outer guide pipe and a bolt cutting net; the middle catheter is sleeved outside the inner catheter and positioned at the proximal end side of the filter plug net; the thrombolytic net and the outer catheter are both sleeved outside the middle catheter, the distal end of the thrombolytic net is converged at the distal end of the middle catheter, and the proximal end of the thrombolytic net is converged at the distal end of the outer catheter; the outer guide pipe and the middle guide pipe are configured to be capable of sliding relatively in the front-back direction, so that the radial shrinkage or radial expansion of the thrombolytic net is controlled, and the maximum outer diameter of the thrombolytic net in a radial expansion state is controlled.

The mechanical thrombus taking support provided by the embodiment is used in the following manner:

firstly, keeping the filter plug net and the cut plug net in respective radial compression states, and sending the whole mechanical cut plug bracket into a blood vessel along the blood flow direction until the filter plug net reaches or passes through a part with wall-attached thrombus in the blood vessel so as to be the optimal sending position; then releasing the filter plug net and the cut plug net to enable the filter plug net and the cut plug net to respectively change from a radially compressed state to a radially expanded state;

secondly, for the thrombolytic mesh, the outer catheter and the middle catheter can axially slide relatively, and the middle catheter is preferably slid back and forth relative to the outer catheter, so that the maximum outer diameter of the thrombolytic mesh in a radial expansion state is changed, the expansion state of the thrombolytic mesh is adapted to the inner diameter of the current blood vessel and can be contacted with the inner wall of the current blood vessel, then the peripheral part of the thrombolytic mesh, especially the part with the maximum outer diameter, can cut the wall-attached thrombus on the current blood vessel wall in a mode of pushing forward or pulling back the middle catheter and the outer catheter simultaneously, the wall-attached thrombus is changed into a free state, and the cut free thrombus flows from the thrombolytic mesh to the inside of the thrombolytic mesh along the blood flow direction and is intercepted by the thrombolytic mesh;

Finally, the whole mechanical thrombus taking bracket is withdrawn from the patient body, and the whole thrombus taking process can be completed.

The thrombus removing action can cut the wall-attached thrombus on the inner wall of the blood vessel of a patient, so that the thrombus in the blood vessel can be removed more quickly and thoroughly, the current form of the thrombus removing net can be kept by fixing the relative positions of the middle catheter and the outer catheter in the thrombus removing process by using the thrombus removing net, the thrombus removing net is prevented from being axially stretched and weakened in the thrombus removing process by being extruded in the axial direction, and the thrombus removing effect of the thrombus removing net in the thrombus removing process is ensured; in addition, the size of the maximum outer diameter of the cut bolt net in a radial expansion state can be adjusted by axially and relatively sliding the outer guide pipe and the middle guide pipe, and the mode of relatively sliding the middle guide pipe back and forth relative to the outer guide pipe is preferred, so that the cut bolt net can be correspondingly adjusted at any time according to the inner diameter of a blood vessel where the cut bolt net is currently positioned and the quantity of the wall-attached thrombus, the cut bolt net can be easily adapted to blood vessels with various inner diameters and can be adjusted at any time, the outer diameter of the cut bolt net in the expansion state is prevented from being excessively large, and especially the inner wall of the blood vessel is less damaged or cut after the wall-attached thrombus is cut, the cut bolt net is more convenient to use and safer.

In conclusion, the technical problems that thrombus is not completely cleared, adaptability to blood vessels is poor, and damage to blood vessel walls is easy to cause in the existing mechanical thrombus taking device are fully relieved.

In an alternative implementation of the present embodiment, it is preferred that the plug assembly further comprises a plug mesh connector; the filter plug net is always sleeved outside the distal end of the inner catheter, and the proximal end of the filter plug net is converged on the filter plug net connecting piece; the thrombolysis assembly further comprises a thrombolysis net connecting piece which is fixedly connected with the distal end of the middle catheter, and the distal end of the thrombolysis net is converged on the thrombolysis net connecting piece; in a first state, the filter plug mesh connector and the cut plug mesh connector are separated from each other, and the filter plug mesh connector is connected to the outer peripheral wall of the inner catheter; in a second state, the filter plug net connecting piece and the cutting plug net connecting piece are connected with each other, and the filter plug net connecting piece is separated from the outer peripheral wall of the inner catheter; the inner conduit and the middle conduit are configured to be movable relative to each other to switch between the first state and the second state.

Further preferably, the filter plug net connecting piece and the cut plug net connecting piece adopt pipe connecting pieces respectively, an external thread is arranged on the peripheral surface of the proximal end of the filter plug net connecting piece, an internal thread is arranged on the peripheral surface of the distal end of the cut plug net connecting piece, the internal guide pipe and the middle guide pipe are configured to be mutually rotatable and relatively slidable in the axial direction, so that the filter plug net connecting piece and the cut plug net connecting piece are in threaded connection in the second state;

And/or, an external thread is arranged on the peripheral wall of the inner conduit, and the filter plug net connecting piece is in threaded connection with the external thread on the peripheral wall of the inner conduit; or the external thread connecting pipe is fixedly connected to the outer part of the inner conduit, and the filter plug net connecting piece is connected to the external thread connecting pipe in a threaded manner.

Further, preferably, the plug assembly further comprises a core tube; the inner catheter is slidably sleeved outside the proximal end of the core tube, the filter plug net is sleeved outside the distal ends of the core tube and the inner catheter, and the distal end of the filter plug net is converged at the distal end of the core tube.

Further preferably, the plug assembly further comprises a hollow cone having a diameter at the distal end that tapers from the proximal end to the distal end, the hollow cone being connected to the distal end of the core tube and the lumen being in communication with the lumen of the core tube; and/or the distal end of the filter plug net, the proximal end of the filter plug net, the distal end of the cut plug net and the proximal end of the cut plug net are all provided with developing rings.

In a second aspect, an embodiment of the present invention provides an operating handle, configured to be assembled with the mechanical thrombolysis device according to any of the foregoing optional embodiments of the first aspect; wherein the operating handle comprises a main handle component and a plunger tube; specifically:

The main handle assembly comprises a main handle housing and a main handle operator; the main handle shell is provided with a window, and the main handle operating piece is arranged in the window and can slide back and forth while rotating radially and circumferentially relative to the main handle shell; the plunger tube is disposed on the proximal side of the main handle assembly and is rotatable and slidable back and forth relative to the main handle housing.

In an assembled state of the mechanical thrombus removing device formed by assembling the mechanical thrombus removing support and the mechanical thrombus removing support, the proximal end of the outer catheter is directly or indirectly connected with the main handle shell, and the outer catheter and the main handle shell are axially and relatively fixed; the proximal end of the middle catheter extends through the outer catheter into the main handle housing interior channel and connects to the main handle operator; the proximal end of the inner catheter is connected to the distal end of the plunger tube after passing through the middle catheter and the main handle housing.

In this embodiment, it is further preferable that a rotation release structure is provided in the internal channel of the main handle housing, the rotation release structure being configured to connect the proximal end of the middle catheter to the main handle actuator, so as to release the torsion force applied to the middle catheter by the main handle actuator while the main handle actuator rotates relative to the main handle housing, so that the middle catheter follows the main handle actuator to slide back and forth relative to the main handle housing and the outer catheter without rotating relative to each other.

Still further preferably, the rotation release structure includes a stationary pipe fitting, a movable pipe fitting, and a stationary pipe fitting-butt seal ring, specifically: the distal end of the fixed end pipe fitting is used for being connected with the proximal end of the middle catheter, and the proximal end of the movable end pipe fitting is fixedly connected with the main handle operation piece. The inner circumferential surface of the proximal end of the fixed end pipe fitting and the outer circumferential surface of the distal end of the movable end pipe fitting are respectively formed into spherical surfaces, and the proximal end of the fixed end pipe fitting is rotationally sleeved outside the distal end of the movable end pipe fitting; or, the outer circumferential surface of the proximal end of the fixed end pipe fitting and the inner circumferential surface of the distal end of the movable end pipe fitting are respectively formed into spherical surfaces, and the distal end of the movable end pipe fitting is rotationally sleeved outside the proximal end of the fixed end pipe fitting. The fixed pipe fitting butt joint sealing ring is arranged at the end part of one of the proximal end of the fixed pipe fitting and the distal end of the movable pipe fitting and is propped against the inner wall of the lumen of the other, so that the lumen of the fixed pipe fitting and the lumen of the movable pipe fitting are communicated in a sealing way, and the distal end of the fixed pipe fitting is fixedly connected with the proximal end of the middle catheter.

In a third aspect, an embodiment of the present invention further provides a thrombus removing device, including the mechanical thrombus removing stand described in any one of the embodiments of the first aspect and the operating handle provided in the second aspect, where: the operating handle further comprises a second luer fitting assembly and an outer sheath, in particular: the second luer assembly includes a second aspiration tube housing, a second knob, and a spin-on seal; the spinning sealing piece is fixed at the proximal end of the second suction tube shell, and the second knob is sleeved outside the second suction tube shell or the spinning sealing piece in a manner that the second knob can rotate relative to the second suction tube shell and the inner peripheral surface of the second knob is in contact with the spinning sealing piece; the outer sheath tube is sleeved outside the outer catheter in a sliding manner, and the proximal end of the outer sheath tube is fixedly connected to the distal end of the second suction tube shell. The proximal end of the outer catheter passes through the outer sheath, the second knob is configured to be able to forward rotate radially inwardly against the second suction housing to squeeze the spin seal, to further forward rotate inwardly against the outer catheter to squeeze the middle catheter, and to reverse rotate radially against the second suction housing to release the spin seal.

In this embodiment, it is further preferred that the operating handle further includes a first luer fitting assembly; the first luer connector assembly comprises a first suction tube shell and a first knob rotationally sleeved at the distal end of the first suction tube shell, and the proximal end of the first suction tube shell is connected with the distal end of the main handle shell and is internally communicated; the second knob proximal end and the first knob distal end have two states of being connected and separated from each other. The proximal end of the outer catheter passes through the outer sheath tube and is fixedly connected to the first knob; the proximal end of the middle catheter extends through the outer catheter, the first knob and the first suction cartridge back into the main handle housing interior passage and connects to the main handle operator.

Because the operation handle and the thrombus removing device provided by the embodiment of the invention both comprise the mechanical thrombus removing bracket provided by the first aspect, the operation handle and the thrombus removing device provided by the embodiment of the invention can achieve all the beneficial effects which can be achieved by the mechanical thrombus removing bracket provided by the first aspect.

In particular, in the context of the present invention, the foregoing "and/or" means "and/or" preceding structures are either simultaneously or alternatively arranged with "and/or" following structures.

Drawings

In order to more clearly illustrate the embodiments of the present invention 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 invention, 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 diagram of an overall assembly structure of a mechanical thrombus removal stent provided by an embodiment of the present invention;

FIG. 2 is a schematic diagram of the overall structure of a filter plug assembly in a mechanical plug removal bracket according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of the explosive structure of FIG. 2;

fig. 4 is a schematic diagram of the overall structure of a bolt cutting assembly in a mechanical bolt taking bracket according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of the explosive structure of FIG. 4;

FIG. 6 is an enlarged view of a portion of the structure of the portion A in FIG. 1;

fig. 7 is a schematic view of the overall structure of a first luer fitting assembly in an operating handle according to an embodiment of the present invention;

FIG. 8 is a schematic view of the overall structure of a main handle assembly in an operating handle according to an embodiment of the present invention;

FIG. 9 is a schematic view of the overall structure of the rotary release structure of FIG. 8;

Fig. 10 is an axial cross-sectional view of the assembled configuration of the first luer fitting, the main handle assembly, and the cut-plug assembly in an embodiment of the invention;

FIG. 11 is an isometric view of the overall structure of a preferred embodiment of the mechanical thrombolysis device of the present invention;

FIG. 12 is an enlarged view of a portion of the structure within the dashed marked box of FIG. 11;

FIG. 13 is a schematic view of the overall structure of a preferred embodiment of the mechanical thrombolytic device of the present invention with both the filter and the cutting networks in radially compressed state;

FIG. 14 is an enlarged view of a portion of the structure within the dashed marked box of FIG. 13;

FIG. 15 is a schematic view showing the overall structure of a preferred embodiment of the mechanical thrombolytic device according to the present invention in a state in which both the filter plug mesh and the thrombolytic mesh are radially expanded and the filter plug mesh connector and the thrombolytic mesh connector are connected to each other;

FIG. 16 is an enlarged view of a portion of the structure within the dashed marked box of FIG. 15;

FIG. 17 is a schematic view showing the overall structure of a preferred embodiment of the mechanical thrombolytic device according to the present invention in a state in which both the filter plug mesh and the thrombolytic mesh are radially expanded and the filter plug mesh connector and the thrombolytic mesh connector are separated from each other;

FIG. 18 is an enlarged view of a portion of the structure within the dashed marked box of FIG. 17;

fig. 19 is a schematic view showing a connection structure between the sheath tube and the second luer connector assembly in the preferred embodiment of the mechanical thrombus removing device according to the present invention.

Icon: 1-a plug assembly; 11-an inner catheter; 12-a filter plug net; 13-a filter plug mesh connector; 14-an external thread connecting pipe; 15-core tube; 16-a hollow conical head; 2-a bolt cutting assembly; 21-a middle conduit; 22-an outer catheter; 23-cutting a bolt net; 24-cut-plug mesh connectors; 3-developing ring; 4-a first luer fitting assembly; 41-a first suction cartridge; 42-a first knob; 43-a first knob cover; 44-a first sealing ring; 45-supporting rings; 5-a main handle assembly; 51-a main handle housing; 52-a main handle operator; 53-a main handle seal ring; 6-a plunger tube; 7-a rotation release structure; 71-end fixing pipe fittings; 72-moving end pipe fitting; 73-abutting the sealing ring by the fixed pipe fitting; 8-an outer sheath; 9-a second luer fitting assembly; 91-a second suction housing; 92-a second knob; 93-a second knob cover; 94-a second sealing ring; 95-rubber rings; 96-spinning ring.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that: like reference numerals and letters designate like items in the drawings, and thus once an item is defined in one drawing, no further definition or explanation thereof is necessary in the subsequent drawings.

In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "proximal", "distal", "front", "rear", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

In particular, in the invention, the end of the medical instrument close to the operator is the proximal end of the medical instrument during operation, the end of the medical instrument entering the blood vessel of the patient is the front end of the medical instrument which is the far end of the medical instrument, and the rear end of the medical instrument is the proximal end.

In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

Some embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without conflict.

Example 1

The present embodiment provides a mechanical bolt-removing bracket, referring to fig. 1 to 6, which comprises a filter bolt assembly 1 and a bolt-cutting assembly 2; specifically:

as shown in fig. 1 to 6, the filter plug assembly 1 comprises an inner catheter 11 and a filter plug mesh 12, wherein the filter plug mesh 12 is provided with a distal end opening, a proximal end of the filter plug mesh 12 is connected to the outer peripheral wall of the inner catheter 11, the structure of the distal end opening of the filter plug mesh 12 can be a convergent point or the filter plug mesh 12 is integrally formed into a whole piece type bag-shaped structure, and the proximal end opening of the filter plug mesh 12 is used for filtering thrombus doped in blood flowing into the filter plug mesh 12 from the proximal end to the distal end. The thrombolysis assembly 2 comprises a middle conduit 21, an outer conduit 22 and a thrombolysis net 23; the middle conduit 21 is sleeved outside the inner conduit 11 and is positioned at the proximal end side of the filter plug net 12; the thrombolytic mesh 23 and the outer catheter 22 are sleeved outside the middle catheter 21, the distal end of the thrombolytic mesh 23 is converged at the distal end of the middle catheter 21, and the proximal end of the thrombolytic mesh 23 is converged at the distal end of the outer catheter 22; the outer catheter 22 and the middle catheter 21 are arranged so as to be capable of sliding relatively in the front-rear direction, thereby controlling radial contraction or radial expansion of the thrombolytic mesh 23, and controlling the maximum outer diameter of the thrombolytic mesh 23 in the radially expanded state.

firstly, keeping the filter plug net 12 and the cut plug net 23 in respective radial compression states, and sending the whole mechanical cut plug bracket into a blood vessel along the blood flow direction until the filter plug net 12 reaches or passes through a part with wall-attached thrombus in the blood vessel so as to be the optimal sending position; then releasing the filter plug mesh 12 and the cut plug mesh 23 to cause the filter plug mesh 12 and the cut plug mesh 23, respectively, to transition from the radially compressed state to the radially expanded state;

secondly, for the thrombolytic mesh 23, the outer catheter 22 and the middle catheter 21 can axially slide relatively, preferably the middle catheter 21 slides back and forth relative to the outer catheter 22, so as to change the maximum outer diameter of the thrombolytic mesh 23 in a radial expansion state, adapt the expansion state of the thrombolytic mesh 23 to the inner diameter of the current blood vessel and can contact the inner wall of the current blood vessel, and then, the peripheral part of the thrombolytic mesh 23, especially the part with the maximum outer diameter, can cut the coanda thrombus on the current blood vessel wall by pushing or pulling the middle catheter 21 and the outer catheter 22 forwards or backwards simultaneously, so that the coanda thrombus is changed into a free state, and the cut thrombus in the free state flows from the thrombolytic mesh 23 to the inside of the thrombolytic mesh 12 along the blood flow direction and is intercepted by the thrombolytic mesh 12;

The above thrombus removing action can cut the wall-attached thrombus on the inner wall of the blood vessel of a patient, so as to remove the thrombus in the blood vessel more quickly and thoroughly, and in the process of using the thrombus removing net 23 to cut the thrombus, the current form of the thrombus removing net 23 can be kept by fixing the relative positions of the middle catheter 21 and the outer catheter 22, so that the thrombus removing net 23 is prevented from being axially stretched by extrusion to weaken the thrombus removing strength in the thrombus removing process, and the thrombus removing effect of the thrombus removing net 23 in the thrombus removing process is ensured; in addition, the size of the maximum outer diameter of the thrombolytic mesh 23 in the radial expansion state can be adjusted by axially sliding the outer catheter 22 and the middle catheter 21 relative to each other, preferably by sliding the middle catheter 21 back and forth relative to the outer catheter 22, so that the thrombolytic mesh 23 can be correspondingly adjusted at any time according to the inner diameter of the blood vessel where the thrombolytic mesh 23 is currently positioned and the amount of the coanda thrombus, the thrombolytic mesh 23 can be easily adapted to blood vessels with various inner diameters and can be adjusted at any time, the damage to the blood vessel wall caused by the overlarge outer diameter of the thrombolytic mesh 23 in the expansion state, particularly the damage to the inner wall of the blood vessel after the coanda thrombus is less or the coanda thrombus is cut, the application is more convenient and safer.

In this embodiment, during the process of cutting the plug by using the plug cutting net 23, the size of the interval between the plug cutting net 23 and the plug filtering net 12 will affect the effect of the plug cutting net 23 to cut the coanda thrombus and whether the plug filtering net 12 will leak, specifically:

if the coanda thrombus itself is relatively large and the coanda is relatively stubborn, in order for the thrombolytic screen 23 to reciprocally cut the coanda thrombus a plurality of times, the filter plug screen 12 should be as far away from the thrombolytic screen 23 as possible to avoid the filter plug screen 12 obstructing the reciprocal cutting action of the thrombolytic screen 23; however, if the coanda thrombus itself is relatively small, if the separation between the filter plug mesh 12 and the cut plug mesh 23 is relatively long, the cut coanda thrombus changes its flow form along with the blood flow, and it is likely that the coaptation between the open edge portion of the proximal end of the filter plug mesh 12 and the inner wall of the blood vessel will leak away, that is, the problem of leakage of the filter plug mesh 12 will occur;

in view of this problem, the applicant has made further improvements to the structure of the present embodiment as follows:

with reference to figures 1 to 6 of the drawings, the filter plug assembly 1 further comprises a filter plug mesh connector 13; the filter plug net 12 is always sleeved outside the distal end of the inner catheter 11, and the proximal end of the filter plug net 12 is converged at the filter plug net connecting piece 13; the thrombolytic assembly 2 further comprises a thrombolytic mesh connector 24, the thrombolytic mesh connector 24 is fixedly connected to the distal end of the middle catheter 21, and the distal end of the thrombolytic mesh 23 is converged at the thrombolytic mesh connector 24; in the first state, the filter plug net connecting member 13 and the cut plug net connecting member 24 are separated from each other, and the filter plug net connecting member 13 is connected to the outer peripheral wall of the inner catheter 11; in the second state, the filter plug net connecting piece 13 and the cut plug net connecting piece 24 are connected with each other, and the filter plug net connecting piece 13 is separated from the outer peripheral wall of the inner catheter 11; the inner conduit 11 and the middle conduit 21 are configured to be movable relative to each other to switch between the first state and the second state. In the preferred embodiment, the inner conduit 11 and the middle conduit 21 are adjustable to axially slide and/or radially rotate relative to each other to adjust the interconnection or disconnection between the plug mesh connector 13 and the cut plug mesh connector 24 and to adjust the axial spacing between the plug mesh 12 and the cut plug mesh 23 in cooperation with the axial sliding between the inner conduit 11 and the middle conduit 21, wherein, more preferably, the axial spacing between the plug mesh 12 and the cut plug mesh 23 is adjusted by sliding the inner conduit 11 back and forth relative to the middle conduit 21 to flexibly cut plugs and filter plugs, specifically:

When the coanda thrombus itself is relatively large and the coanda is relatively stubborn, the first state is adjusted to separate the filter plug net connecting piece 13 and the cutting plug net connecting piece 24 from each other, and the filter plug net connecting piece 13 is connected to the outer peripheral wall of the inner conduit 11, on the basis, the inner conduit 11 is pushed forward relative to the middle conduit 21, so that the axial distance between the filter plug net 12 and the cutting plug net 23 is large, then, the middle guide pipe 21 and the outer guide pipe 22 are synchronously pushed and pulled in a reciprocating manner relative to the inner guide pipe 11, so that the plug cutting net 23 cuts plugs, the plug cutting net 12 does not obstruct the reciprocating cutting action of the plug cutting net 23 in the plug cutting process, thrombus is large, and the plug leakage problem of the plug cutting net 12 is not easy to occur after cutting;

when the coanda thrombus is smaller, the filter screen connecting piece 13 and the filter screen connecting piece 24 are mutually connected, the filter screen connecting piece 13 is separated from the peripheral wall of the inner guide pipe 11, but the filter screen 12 is always sleeved outside the far end of the inner guide pipe 11, on the basis, the middle guide pipe 21 and the outer guide pipe 22 are synchronously pushed and pulled back and forth relative to the inner guide pipe 11, so that the filter screen 23 is cut, the axial distance between the filter screen 12 and the filter screen 23 is always the minimum distance in the process of cutting the thrombus, the thrombus cut by the filter screen 23 directly enters the filter screen 12, and the small thrombus can be easily peeled off from the inner wall of a blood vessel, so that the small thrombus can be cut off only by cutting for 1 time, and the problem of leakage of the filter screen 12 due to free thrombus which has entered into the filter screen 12 in the process of axially reciprocating the filter screen 23 is avoided.

In conclusion, according to the actual coanda situation of thrombus, the thrombus is cut and filtered in a flexible way.

Further, in order to satisfy the above "first state", the filter plug net connecting member 13 and the cut plug net connecting member 24 are separated from each other, and the filter plug net connecting member 13 is connected to the outer circumferential wall of the inner catheter 11; in the second state, the filter plug net connecting piece 13 and the cut plug net connecting piece 24 are connected with each other, and the filter plug net connecting piece 13 is separated from the outer peripheral wall of the inner catheter 11; the inner conduit 11 and the middle conduit 21 are configured to be capable of relative movement to switch between a first state and a second state ", as the best specific connection structure in the present preferred embodiment: the filter plug net connecting piece 13 and the cut plug net connecting piece 24 are respectively pipe connecting pieces, the outer peripheral surface of the proximal end of the filter plug net connecting piece 13 is provided with external threads, the inner peripheral surface of the distal end of the cut plug net connecting piece 24 is provided with internal threads, the inner guide pipe 11 and the middle guide pipe 21 are configured to be capable of mutually rotating and relatively sliding in the axial direction, and preferably, one circumferential rotation direction of the inner guide pipe 11 is defined as positive rotation, and the opposite rotation direction is defined as reverse rotation: the inner catheter 11 is reversed and pushed forward axially by the fixed middle catheter 21 so that the filter plug net connector 13 and the cut plug net connector 24 are separated from each other in the above-described first state, and the inner catheter 11 is withdrawn forward and retracted axially by the fixed middle catheter 21 so that the filter plug net connector 13 and the cut plug net connector 24 are screw-coupled in the above-described second state. Further, as shown in fig. 6, it is further preferable that the proximal end of the filter plug net connecting member 13 and the distal end of the cut plug net connecting member 24 are tapered, respectively, so as to perform positioning and guiding, and further, assist butt guiding when the proximal end of the filter plug net connecting member 13 and the distal end of the cut plug net connecting member 24 need to be connected to each other, thereby improving the connection efficiency.

The connection between the filter plug mesh connection 13 and the outer peripheral wall of the inner conduit 11 may then be: the outer peripheral wall of the inner conduit 11 is provided with external threads, and the filter plug net connecting piece 13 is connected with the external threads on the outer peripheral wall of the inner conduit 11 in a threaded manner; alternatively, the external thread connecting pipe 14 is fixedly connected to the outside of the inner conduit 11, the filter plug net connecting piece 13 is in thread connection with the external thread connecting pipe 14, when the filter plug net connecting piece 13 and the cut plug net connecting piece 24 are connected with each other, the filter plug net connecting piece 13 can be in thread connection with or separated from the outer peripheral wall of the inner conduit 11 by rotating the inner conduit 11 relative to the middle conduit 21, and when the connection mode of the filter plug net connecting piece 13 and the cut plug net connecting piece 24 is the preferable thread connection, as shown in fig. 6, the screwing torque of the external thread on the outer peripheral wall of the filter plug net connecting piece 13 and the internal conduit 11 or the screwing torque of the external thread connecting pipe 14 is larger than the screwing torque of the filter plug net connecting piece 13 and the cut plug net connecting piece 24. In the first state, the filter plug net connecting piece 13 and the cut plug net connecting piece 24 are separated from each other, and the filter plug net connecting piece 13 is screwed to the outer peripheral wall of the inner catheter 11; at this time, the inner conduit 11 is withdrawn in the forward direction and the axial direction relative to the middle conduit 21, the filter screen connecting piece 13 and the cut-off screen connecting piece 24 are gradually screwed, and the inner conduit 11 is withdrawn in the forward direction and the axial direction relative to the middle conduit 21, the filter screen connecting piece 13 is separated from the outer circumferential surface of the inner conduit 11 or separated from the external screw connection pipe 14, and the second state is switched, namely, the filter screen connecting piece 13 and the cut-off screen connecting piece 24 are connected with each other, and the filter screen connecting piece 13 is separated from the outer circumferential wall of the inner conduit 11; when it is desired to switch from the second state to the first state, then the opposite is true: the inner catheter 11 is reversed and pushed forward axially with respect to the middle catheter 21, so that the filter plug net connecting piece 13 is re-screwed to the outer peripheral surface of the inner catheter 11 or re-screwed to the externally threaded connecting pipe 14, and the inner catheter 11 is further rotated forward and pushed forward axially with respect to the middle catheter 21, so that the filter plug net connecting piece 13 and the cut plug net connecting piece 24 are gradually separated and are switched to the first state.

To further increase operational stability and controllability, it is further preferred that the plug assembly 1 further comprises a core tube 15; the inner conduit 11 is slidably sleeved outside the proximal end of the core tube 15, the filter plug net 12 is sleeved outside the distal ends of the core tube 15 and the inner conduit 11, and the distal end of the plug mesh 12 is convergent to the distal end of the core tube 15.

To avoid the intravascular thrombus from obstructing the passing of the filter plug net 12 and to improve the penetration smoothness, in this embodiment, the filter plug assembly 1 preferably further includes a hollow conical head 16 having a distal diameter gradually decreasing from the proximal end to the distal end, the hollow conical head 16 is connected to the distal end of the core tube 15 and the inner cavity is communicated with the lumen of the core tube 15 to assist in opening and rapidly convey the thrombus removing assembly to the distal side of the thrombus.

In addition, to better control the access location of the mechanical thrombolytic stent, in some alternative implementations of this embodiment, it is preferable to provide a developing ring 3 at the distal end of the filter plug mesh 12, the proximal end of the filter plug mesh 12, the distal end of the cutting plug mesh 23, and the proximal end of the cutting plug mesh 23 to help the operator observe where the device is located, and to accurately cut and plug.

Example two

The present embodiment provides an operating handle for assembling with the mechanical thrombolysis device provided in any of the alternative embodiments of the present embodiment.

With reference to figures 7 to 11 of the drawings, the operating handle comprises a main handle assembly 5 and a plunger tube 6; specifically: referring to fig. 8, the main handle assembly 5 includes a main handle housing 51 and a main handle operator 52; the main handle shell 51 is provided with a window, and the main handle operating member 52 is arranged in the window and can slide back and forth while rotating radially and circumferentially relative to the main handle shell 51; referring to fig. 10 and 11, the plunger tube 6 is provided on the proximal end side of the main handle assembly 5, and is rotatable and slidable back and forth with respect to the main handle housing 51. And, as shown in fig. 8, the main handle assembly 5 further preferably includes a main handle seal ring 53, the main handle seal ring 53 including a main handle distal seal ring for sealing an inner peripheral surface of the main handle operating member 52 from a wall surface of the main handle housing 51 and a main handle proximal seal ring provided in an inner passage of the main handle housing 51 for sealing a gap between the wall of the inner passage and an outer peripheral wall of the inner catheter 11 passing through the inner passage.

The specific assembly structure of the mechanical thrombus removing device formed by assembling the mechanical thrombus removing bracket provided by any one of the alternative embodiments of the present invention with the mechanical thrombus removing bracket in the embodiment is shown in fig. 10 to 18, in the assembled state, the proximal end of the outer catheter 22 is directly or indirectly connected to the main handle housing 51, and the outer catheter 22 and the main handle housing 51 are relatively fixed in the axial direction; the proximal end of the middle catheter 21 extends through the outer catheter 22 into the interior channel of the main handle housing 51 and is connected to the main handle operator 52; the proximal end of the inner catheter 11 is connected to the distal end of the plunger tube 6 through the middle catheter 21 and the main handle housing 51. The main handle operating member 52 slides back and forth while rotating radially and circumferentially relative to the main handle housing 51, carrying the middle catheter 21 back and forth relative to the main handle housing 51 and the outer catheter 22; the proximal end of the inner catheter 11 is connected to the distal end of the plunger tube 6, and the distal end of the plunger tube 6 is preferably threaded to the proximal end of the main handle housing 51, and is also detachable from the main handle housing 51. The main handle actuator 52 rotates while sliding back and forth, and operates more smoothly than if the main handle actuator 52 is pushed directly back and forth.

In an alternative implementation of the present embodiment, as shown in fig. 8, preferably, a rotation release structure 7 is provided in the internal channel of the main handle housing 51, and the rotation release structure 7 is used to connect the proximal end of the middle catheter 21 to the main handle actuator 52, so that the twisting force of the main handle actuator 52 on the middle catheter 21 is released while the main handle actuator 52 rotates relative to the main handle housing 51, so that the middle catheter 21 slides back and forth relative to the main handle housing 51 and the outer catheter 22, following the main handle actuator 52, without rotating relative to each other.

Preferably, as shown in fig. 9, in combination with fig. 8, the rotation release structure 7 includes a fixed end pipe 71, a movable end pipe 72, and a fixed pipe abutting seal 73. The distal end of the stationary tube member 71 is adapted to be coupled to the proximal end of the intermediate catheter 21 and the proximal end of the movable tube member 72 is fixedly coupled to the main handle actuator 52. The proximal inner peripheral surface of the fixed end pipe 71 and the distal outer peripheral surface of the movable end pipe 72 are respectively formed into spherical surfaces, and the proximal end of the fixed end pipe 71 is rotatably sleeved outside the distal end of the movable end pipe 72; alternatively, the proximal outer circumferential surface of the stationary tube 71 and the distal inner circumferential surface of the movable tube 72 are formed into spherical surfaces, respectively, and the distal end of the movable tube 72 is rotatably fitted over the proximal outer portion of the stationary tube 71. The fixed pipe fitting butt joint sealing ring 73 is arranged at the end part of one of the proximal end of the fixed pipe fitting 71 and the distal end of the movable pipe fitting 72 and is pressed against the inner wall of the lumen of the other, so that the lumen of the fixed pipe fitting 71 and the lumen of the movable pipe fitting 72 are communicated in a sealing way, and the distal end of the fixed pipe fitting 71 is fixedly connected with the proximal end of the middle catheter.

Example III

The present embodiment provides a thrombus removing device, including a mechanical thrombus removing stand provided in any one of the optional embodiments of the first embodiment and an operation handle provided in the second embodiment, wherein: the operating handle further comprises a second luer fitting assembly 9 and an outer sheath 8.

Specifically, referring to fig. 12-19, the second luer connector assembly 9 includes a second aspiration tube housing 91, a second knob 92, and a spin-on seal; the spinning seal is fixed at the proximal end of the second suction tube shell 91, and the second knob 92 is sleeved outside the second suction tube shell 91 or the spinning seal in a manner that the second knob can rotate relative to the second suction tube shell 91 and the inner peripheral surface of the second knob is contacted with the spinning seal; the outer sheath tube 8 is sleeved outside the outer catheter 22 in a sliding way, and the proximal end of the outer sheath tube is fixedly connected to the distal end of the second suction tube shell 91; as in the assembled configuration described in embodiment two, and more particularly with reference to fig. 10-18, in the assembled condition, the proximal end of the outer catheter 22 passes through the outer sheath 8, and the second knob 92 is configured to be able to squeeze the spin seal radially inward against the forward rotation of the second aspiration tube 91, thereby squeezing the outer catheter 22, further squeezing the middle catheter 21 forward and inward, and to be able to release the spin seal radially reverse against the second aspiration tube 91. Also, as shown in fig. 19, the second luer fitting assembly 9 further preferably includes a second knob cover 93, a second sealing ring 94, a rubber ring 95 and a spinning ring 96, wherein the second knob cover 93 is sleeved outside the second suction tube shell 91 and is matched with the second knob 92, and the rubber ring 95 and the spinning ring 96 are mounted on the inner peripheral wall of the second suction tube shell 91; the second seal 94 is used to seal the gap between the inner peripheral surface of the second knob 92 and the outer peripheral surface of the first suction casing 41, and the rubber ring 95 and the spinning ring 96 are used as the above-mentioned spinning seal for pressing and locking the conduit passing through the second suction casing 91 under the pressure of the second knob 92, and the spinning seal may also be an integrally formed single seal structure.

Further, in the preferred implementation of the present embodiment, the mechanical thrombolysis device further comprises a first luer fitting assembly 4; the first luer fitting assembly 4 comprises a first suction tube shell 41 and a first knob 42 rotatably sleeved at the distal end of the first suction tube shell 41, wherein the proximal end of the first suction tube shell 41 is connected with the distal end of the main handle shell 51 and is communicated with the inside; the proximal end of the second knob 92 and the distal end of the first knob 42 have two states of interconnection and separation from each other. The proximal end of the outer catheter 22 is fixedly connected to the first knob 42 after passing through the outer sheath 8; the proximal end of the middle catheter 21 extends through the outer catheter 22, the first knob 42 and the first suction housing 41 back into the interior channel of the main handle housing 51 and is connected to the main handle operator 52. Moreover, as shown in fig. 7, the first luer fitting assembly 4 further preferably includes a first knob cover 43, a first sealing ring 44 and a supporting ring 45, the supporting ring 45 is sleeved outside the first suction tube shell 41, the distal end of the first knob cover 43 and the proximal end of the first knob 42 are respectively sleeved at the proximal end and the distal end of the supporting ring 45 to cooperate, and the supporting ring 45 is used for supporting the proximal end of the first knob 42 and the distal end of the first knob cover 43; the first sealing ring 44 includes a distal sealing ring for sealing the inner circumferential surface of the first knob 42 and the outer circumferential surface of the first suction housing 41 and an inner passage provided in the first suction housing 41, a proximal seal ring for sealing the gap between the inner channel wall and the outer peripheral wall of the middle conduit 21 passing through the inner channel.

In this embodiment, the specific connection means between the proximal end of the second knob 92 and the distal end of the first knob 42, which have two states of connection and disconnection, includes, but is not limited to, making one of the distal end of the first knob 42 in the first luer fitting assembly 4 and the proximal end of the second knob 92 in the second luer fitting assembly 9 an inner conical end and the other an outer conical end, which can be butted against each other or separated from each other.

Referring to fig. 10 to 19, taking the best mode of the thrombus removing device provided in this embodiment as an example, the principle of the operation of the mechanical thrombus removing stand by the operation handle of the assembly structure of this embodiment is combed as follows:

as shown in fig. 13 and 14: in the initial state, the second knob 92 is screwed tightly, the outer catheter 22 is further pressed after the outer catheter 22 is pressed, so that the outer catheter 22 is elastically deformed until the middle catheter 21 is pressed, and the filter plug net 12 and the cut plug net 23 are positioned in the outer sheath tube 8 and are in a radially compressed state; at this time: the relative positional relationship between the filter plug web connector 13, the cut plug web connector 24 and the peripheral wall of the inner catheter 11 is at least four possible: (1) that is, the first state, the filter plug net connecting member 13 and the cut plug net connecting member 24 are separated from each other, and the filter plug net connecting member 13 is connected to the outer circumferential wall of the inner catheter 11; (2) the filter plug net connecting piece 13 and the cut plug net connecting piece 24 are separated from each other, and the filter plug net connecting piece 13 is separated from the outer peripheral wall of the inner conduit 11; (3) that is, the second state, the filter plug net connecting member 13 is connected with the cut plug net connecting member 24, and the filter plug net connecting member 13 is separated from the outer peripheral wall of the inner catheter 11; (4) the filter plug net connecting piece 13 is connected with the cutting plug net connecting piece 24, and the filter plug net connecting piece 13 is connected with the outer peripheral wall of the inner conduit 11; assuming that the connection between the filter plug net connecting piece 13 and the cut plug net connecting piece 24 and between the filter plug net connecting piece 13 and the outer peripheral wall of the inner catheter 11 is screw connection, and the initial state is (1), other cases can be directly obtained by referring to the deformation reasoning of the step:

After the distal end of the thrombus removal device is delivered to the target site in the vessel, the second knob 92 is unscrewed, at which time the second luer fitting assembly 9 is withdrawn relative to the first luer fitting assembly 4 to withdraw the outer sheath 8 relative to the outer catheter 22, or the first luer fitting assembly 4, the main handle assembly 5 and the plunger tube 6 are advanced relative to the second luer fitting assembly 9, and the outer catheter 22, the middle catheter 21 and the inner catheter 11 are advanced relative to the outer sheath 8 to release the filter plug mesh 12 and the cut plug mesh 23 in the vessel;

after release, the proximal end of the second knob 92 may be connected to the distal end of the first knob 42 by means of a bayonet or threaded connection or the like;

then: according to the maximum diameter of the vessel inner diameter adjusting thrombolytic net 23, the adjusting mode is that the main handle operating member 52 is axially slid while rotating relative to the main handle shell 51, and the middle catheter 21 is slid back and forth relative to the main handle shell 51 and the outer catheter 22 until the maximum diameter of the thrombolytic net 23 is adapted to the current vessel inner diameter;

and, according to the thrombus size and the attachment wall condition, the connection relation and the axial distance between the cut-off net 23 and the filter plug net 12 are adjusted, in the adjustment mode, the second knob 92 is screwed, so that the second knob 92 presses the outer conduit 22, and then further presses the outer conduit 22 to enable the outer conduit 22 to generate elastic deformation until the middle conduit 21 is pressed, then through rotating and axially sliding the plunger tube 6, the inner conduit 11 is controlled to rotate and axially slide relative to the middle conduit 21, the connection relation and the axial distance between the initial cut-off net 23 and the filter plug net 12 are in a first state, the filter plug net connecting piece 13 and the cut-off net connecting piece 24 are separated from each other, and the filter plug net connecting piece 13 is connected with the outer peripheral wall of the inner conduit 11 in a threaded manner, at this time, the filter plug net connecting piece 13 and the cut-off net connecting piece 24 are gradually screwed in a threaded manner (the action of the axial back-off plunger tube 6 can be driven by the threaded connection itself), and the filter plug net connecting piece 13 is further rotated relative to the middle conduit 21 and the plug net connecting piece 21 (the action of the axial back-off plunger tube 6 can be driven by the threaded connection itself), so that the filter plug net connecting piece 13 is separated from the inner peripheral surface 11 or the outer peripheral surface of the filter plug net connecting piece 14 is separated from the outer peripheral surface of the filter plug net connecting piece 13, and the filter plug net connecting piece 13 is connected with the outer peripheral piece 11; when it is desired to switch from the second state to the first state, then the opposite is true: the inner conduit 11 is reversely rotated and axially pushed forward relative to the middle conduit 21, so that the filter plug net connecting piece 13 is connected with the outer peripheral surface of the inner conduit 11 in a threaded manner or is connected with the external threaded connecting pipe 14 in a threaded manner again, and the inner conduit 11 is further rotated forward and axially pushed forward relative to the middle conduit 21, so that the filter plug net connecting piece 13 and the filter plug net connecting piece 24 are gradually separated, and the first state is switched; then the interval between the filter plug net connecting piece 13 and the cut plug net connecting piece 24 is adjusted by matching with the plunger tube 6 which slides back and forth relative to the middle guide tube 21;

After the adjustment, the second knob 92 is in a state of pressing the outer catheter 22 and then further pressing the outer catheter 22 to elastically deform the outer catheter 22 until the middle catheter 21 is pressed, in this state, the state of the bolt cutting net 23 is maintained, and the main handle assembly 5 is pushed forward or withdrawn backward relative to the plunger tube 6, so that bolt cutting and filtering can be performed;

finally, the second knob 92 is unscrewed, the connection between the second knob 92 and the first knob 42 is released, the outer sheath tube 8 is sleeved outside the filter plug net 12 and the cut plug net 23 again, the filter plug net 12 and the cut plug net 23 are positioned inside the outer sheath tube 8 and are in a radially compressed state, and then the second knob 92 is screwed again to withdraw the whole thrombus removing device from the body of a patient, so that the whole thrombus removing process is completed.

Since the operating handle provided in the second embodiment and the thrombus removing device provided in the third embodiment of the present disclosure each include the mechanical thrombus removing stand described in the first embodiment, the operating handle provided in the second embodiment and the thrombus removing device provided in the third embodiment of the present disclosure can achieve all the beneficial effects achieved by the mechanical thrombus removing stand in the first embodiment, and the specific structure and the effects achieved by the device can be obtained by referring to each optional or preferred embodiment in the first embodiment.

Finally, it should be noted that:

1. in the present specification, each luer connector assembly is a conventional luer connector assembly in the field of medical apparatuses, and the innovation and improvement mainly lies in that the luer connector assembly is used in linkage cooperation with the outer catheter 22, the middle catheter 21, the inner catheter 11 and the outer sheath tube 8, so that other more specific conventional structures of the luer connector assembly for removing the knob and the suction tube shell are not further disassembled in detail to avoid redundancy;

2. in the present specification, "and/or" means "and/or" preceding structure is provided simultaneously or alternatively with "and/or" following structure;

3. in the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described by differences from other embodiments, and identical and similar parts between the embodiments are only required to be seen with each other; the above embodiments in the present specification are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims

1. A mechanical thrombus taking support, which is characterized in that: comprising the following steps:

a filter plug assembly (1) comprising an inner conduit (11) and a filter plug net (12), wherein the filter plug net (12) is provided with a far-end binding opening at the near end and is connected with the peripheral wall of the inner conduit (11) at the near end;

the bolt cutting assembly (2) comprises a middle guide pipe (21), an outer guide pipe (22) and a bolt cutting net (23); the middle guide pipe (21) is sleeved outside the inner guide pipe (11) and is positioned at the proximal end side of the filter plug net (12); the thrombolytic mesh (23) and the outer catheter (22) are sleeved outside the middle catheter (21), the distal end of the thrombolytic mesh (23) is converged at the distal end of the middle catheter (21), and the proximal end of the thrombolytic mesh (23) is converged at the distal end of the outer catheter (22);

the outer guide pipe (22) and the middle guide pipe (21) are configured to be capable of sliding relatively in the front-back direction, so that the radial shrinkage or radial expansion of the thrombolytic net (23) is controlled, and the maximum outer diameter of the thrombolytic net (23) in a radial expansion state is controlled.

2. The mechanical thrombolytic stent of claim 1, wherein:

the filter plug assembly (1) further comprises a filter plug mesh connector (13); the filter plug net (12) is always sleeved outside the far end of the inner catheter (11), and the near end of the filter plug net (12) is converged on the filter plug net connecting piece (13); the thrombolytic assembly (2) further comprises a thrombolytic net connecting piece (24), wherein the thrombolytic net connecting piece (24) is fixedly connected to the distal end of the middle catheter (21), and the distal end of the thrombolytic net (23) is converged on the thrombolytic net connecting piece (24);

In a first state, the filter plug net connecting piece (13) and the cutting plug net connecting piece (24) are separated from each other, and the filter plug net connecting piece (13) is connected to the outer peripheral wall of the inner conduit (11); in a second state, the filter plug net connecting piece (13) and the cutting plug net connecting piece (24) are connected with each other, and the filter plug net connecting piece (13) is separated from the outer peripheral wall of the inner conduit (11);

the inner conduit (11) and the middle conduit (21) are configured to be relatively movable to switch between the first state and the second state.

3. The mechanical thrombolytic stent of claim 2, wherein:

the filter plug net connecting piece (13) and the cut plug net connecting piece (24) are respectively pipe connecting pieces, an external thread is arranged on the peripheral surface of the proximal end of the filter plug net connecting piece (13), an internal thread is arranged on the inner peripheral surface of the distal end of the cut plug net connecting piece (24), and the inner guide pipe (11) and the middle guide pipe (21) are configured to be mutually rotatable and relatively slide in the axial direction, so that the filter plug net connecting piece (13) is in threaded connection with the cut plug net connecting piece (24) in the second state;

and/or, an external thread is arranged on the outer peripheral wall of the inner conduit (11), and the filter plug net connecting piece (13) is connected with the external thread on the outer peripheral wall of the inner conduit (11) in a threaded manner; or, an external threaded connecting pipe (14) is fixedly connected to the outside of the inner conduit (11), and the filter plug net connecting piece (13) is connected to the external threaded connecting pipe (14) in a threaded mode.

4. The mechanical thrombolytic stent of claim 2, wherein:

the plug assembly (1) further comprises a core tube (15); the inner catheter (11) is slidably sleeved outside the proximal end of the core tube (15), the filter plug net (12) is sleeved outside the distal ends of the core tube (15) and the inner catheter (11), and the distal end of the filter plug net (12) is converged at the distal end of the core tube (15).

5. The mechanical thrombolytic stent of claim 4, wherein:

the filter plug assembly (1) further comprises a hollow conical head (16) with the outer diameter at the distal end gradually decreasing from the proximal end to the distal end, the hollow conical head (16) is connected to the distal end of the core tube (15), and the inner cavity is communicated with the lumen of the core tube (15);

and/or the distal end of the filter plug net (12), the proximal end of the filter plug net (12), the distal end of the cut plug net (23) and the proximal end of the cut plug net (23) are all provided with developing rings (3).

6. An operating handle, characterized in that: for assembly with the mechanical thrombolytic stent of any of claims 1-5 to form a mechanical thrombolytic device; wherein, operating handle includes:

a main handle assembly (5) comprising a main handle housing (51) and a main handle operator (52); the main handle shell (51) is provided with a window, and the main handle operating piece (52) is arranged in the window and can slide back and forth while rotating radially and circumferentially relative to the main handle shell (51);

A plunger tube (6) provided on the proximal end side of the main handle assembly (5) and capable of rotating and sliding back and forth with respect to the main handle housing (51);

in an assembled state of the mechanical thrombus removing device formed by assembling the mechanical thrombus removing support and the mechanical thrombus removing support, the proximal end of the outer catheter (22) is directly or indirectly connected with the main handle shell (51), and the outer catheter (22) and the main handle shell (51) are axially and relatively fixed; the proximal end of the middle catheter (21) extends through the outer catheter (22) into the internal passageway of the main handle housing (51) and is connected to the main handle operator (52); the proximal end of the inner catheter (11) is connected to the distal end of the plunger tube (6) after passing through the middle catheter (21) and the main handle housing (51).

7. The operating handle according to claim 6, wherein:

a rotation release structure (7) is arranged in an internal channel of the main handle shell (51), the rotation release structure (7) is used for connecting the proximal end of the middle catheter (21) with the main handle operating piece (52), so that when the main handle operating piece (52) rotates relative to the main handle shell (51), the torsion acting force of the main handle operating piece (52) on the middle catheter (21) is released, and the middle catheter (21) slides back and forth relative to the main handle shell (51) and the outer catheter (22) but does not rotate relative to each other.

8. The operating handle according to claim 7, wherein: the rotation release structure (7) comprises a fixed end pipe fitting (71), a movable end pipe fitting (72) and a fixed pipe fitting butt joint sealing ring (73);

the distal end of the fixed end pipe fitting (71) is used for being connected with the proximal end of the middle catheter (21), and the proximal end of the movable end pipe fitting (72) is fixedly connected with the main handle operating piece (52);

the inner circumferential surface of the proximal end of the fixed end pipe fitting (71) and the outer circumferential surface of the distal end of the movable end pipe fitting (72) are respectively formed into spherical surfaces, and the proximal end of the fixed end pipe fitting (71) is rotationally sleeved outside the distal end of the movable end pipe fitting (72); or, the proximal outer circumferential surface of the fixed end pipe fitting (71) and the distal inner circumferential surface of the movable end pipe fitting (72) are respectively formed into spherical surfaces, and the distal end of the movable end pipe fitting (72) is rotationally sleeved outside the proximal end of the fixed end pipe fitting (71);

the fixed pipe fitting butt joint sealing ring (73) is arranged at the end part of one of the proximal end of the fixed pipe fitting (71) and the distal end of the movable pipe fitting (72) and is pressed against the inner wall of the lumen of the other, so that the lumen of the fixed pipe fitting (71) and the lumen of the movable pipe fitting (72) are communicated in a sealing way, and the distal end of the fixed pipe fitting (71) is fixedly connected with the proximal end of the middle catheter.

9. A mechanical thrombus removal device, characterized in that: comprising the mechanical thrombolytic stent of any of claims 1-5 and the operating handle of any of claims 6-8, wherein:

the operating handle also comprises a second luer connector assembly (9) and an outer sheath tube (8);

the second luer fitting assembly (9) comprises a second aspiration tube housing (91), a second knob (92) and a spin-on seal; the spinning sealing piece is fixed at the proximal end of the second suction tube shell (91), and the second knob (92) is sleeved outside the second suction tube shell (91) or the spinning sealing piece in a mode that the second knob can rotate relative to the second suction tube shell (91) and the inner peripheral surface of the second knob is in contact with the spinning sealing piece; the outer sheath tube (8) is sleeved outside the outer catheter (22) in a sliding way, and the proximal end of the outer sheath tube is fixedly connected to the distal end of the second suction tube shell (91);

the proximal end of the outer catheter (22) passes through the outer sheath (8), the second knob (92) is configured to squeeze the spin seal radially inward relative to the second suction housing (91), thereby squeezing the outer catheter (22), further squeezing the middle catheter (21) forward and inward, and to release the spin seal radially in reverse relative to the second suction housing (91).

10. The mechanical thrombolytic device of claim 9 wherein:

the operating handle also comprises a first luer connector assembly (4);

the first luer connector assembly (4) comprises a first suction tube shell (41) and a first knob (42) rotationally sleeved at the distal end of the first suction tube shell (41), and the proximal end of the first suction tube shell (41) is connected with the distal end of the main handle shell (51) and is internally communicated; the second knob (92) has two states of being connected and disconnected with each other between the proximal end and the distal end of the first knob (42);

the proximal end of the outer catheter (22) passes through the outer sheath tube (8) and is fixedly connected to the first knob (42); the proximal end of the middle catheter (21) extends through the outer catheter (22), the first knob (42) and the first suction cartridge (41) back into the internal passage of the main handle housing (51) and is connected to the main handle activation (52).