CN114711896A - Thrombus taking device - Google Patents

Abstract

The invention relates to a thrombus taking device which comprises an operating handle and a thrombus taking element, wherein the thrombus taking element comprises a basket and a filter membrane for accommodating thrombus, the near end of the basket is an open end, the filter membrane is of a bag-shaped structure and is provided with a bag opening and a bag bottom opposite to the bag opening, the filter membrane is arranged in the basket in an initial state, the bag opening of the filter membrane is connected with the basket, the bag opening is positioned at the near end, the bag bottom is positioned at the far end, the operating handle comprises a shell assembly and an operating piece movably arranged on the shell assembly, the operating piece is linked with the bag bottom of the filter membrane, and when the operating piece moves axially relative to the shell assembly, the operating piece can drive the bag bottom to turn towards the near end relative to the bag opening and restore to the initial state. The thrombus taking device can be used for conveniently cleaning thrombus in the thrombus taking element.

Description

Thrombus taking device

Technical Field

The invention relates to the technical field of medical instruments, in particular to a thrombus removal device.

Background

This section provides background information related to the present disclosure only and is not necessarily prior art.

Deep vein thrombosis is a type of thrombosis in a venous blood vessel in which emboli grow in one of the deep veins of the body, particularly the iliac vein. These emboli may fall from the vein wall, pass through the heart, and become lodged in the pulmonary arteries, potentially leading to pulmonary embolism.

Currently, there are various measures for the prevention of deep vein thrombosis. Such as mechanical prophylaxis, pharmacotherapy prophylaxis.

But the occurrence of deep vein thrombosis cannot be completely avoided by simple preventive measures. And the anticoagulant can not effectively eliminate thrombus and reduce the occurrence rate of embolism. Catheter contact thrombolysis and systemic thrombolysis using thrombolytic or defibrotizing drugs, both present risks of bleeding and allergic reactions, and do not completely eliminate the thrombus.

The prior art provides a embolectomy device that includes a mesh bag that is generally conical and that can be manipulated to an expanded state. This string bag can be operated to the inflation expansion in the blood vessel, and the string bag after the expansion moves to the near-end, and the near-end tip of string bag can cut the thrombus that is located the vascular wall, and the thrombus that drops from the vascular wall gets into the toper net intracavity of string bag, and after the cutting was accomplished, the thrombus in the string bag was taken out to external along with the string bag. Generally speaking, thrombus in the blood vessel needs to be cleaned up many times under most conditions and then can be removed, before cutting the thrombus again, the thrombus in the instrument needs to be cleaned up firstly, and the thrombus in the instrument is inconvenient to clean up in the prior art.

Disclosure of Invention

Therefore, the thrombus removal device is needed to be provided for solving the technical problem of inconvenience in cleaning thrombus in the instrument in the prior art.

The utility model provides a thrombectomy device, including operating handle and thrombectomy component, state and embolise the component and include the basket and be used for accomodating the filter membrane of thrombus, the near-end of basket is the open end, the filter membrane is bag-shaped structure, the bag relative with the sack has the sack, under initial condition, the filter membrane sets up in the basket, the sack and the basket of filter membrane link to each other, and the sack is located the near-end, be located the distal end at the bottom of the bag, operating handle includes casing assembly and locates the operating parts on the casing assembly with moving about, the linkage at the bottom of the bag of operating parts and filter membrane, when the operating parts was for casing assembly axial displacement, the operating parts can drive at the bottom of the bag for the sack near-end upset and resume to initial condition.

The operation handle of the thrombus taking device comprises a shell assembly and an operation piece movably arranged on the shell assembly, wherein the operation piece is linked with the bag bottom of the filter membrane, when the operation piece moves axially relative to the shell assembly, the operation piece can drive the bag bottom to turn towards the near end relative to the bag opening and restore to the initial state, and the bag opening of the filter membrane is connected with the basket; after thrombus cleaning is finished, the operating part moves along the far end, so that the filter membrane moves back to the initial state (the bag mouth is positioned at the near end, and the bag bottom is positioned at the far end), and the thrombus can enter the thrombus again to be taken conveniently.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Wherein:

fig. 1 is a schematic structural view of a thrombus removal device according to a first embodiment of the present invention.

Fig. 2 is a schematic structural view of a thrombus removal device with a larger radial expansion degree in a first embodiment of the present invention.

Fig. 3 is a schematic structural view of a bolt taking element and a part of a pipe assembly in a first embodiment of the invention.

FIG. 4 is a schematic view showing the structure of a filter in the first embodiment of the present invention.

Fig. 5 is a sectional view schematically showing the structure of the pipe assembly according to the first embodiment of the present invention.

FIG. 6 is a schematic cross-sectional view of a tube assembly according to a first embodiment of the present invention.

FIG. 7 is a diagram of the filter membrane of the embolectomy device in an inverted state according to the first embodiment of the present invention.

FIG. 8 is a schematic representation of the structure of a base pipe and exhaust assembly in a first embodiment of the invention.

Fig. 9 is a schematic structural view of an outer tube in the first embodiment of the present invention.

Fig. 10 is a schematic structural view of an operating handle, a vent assembly and a locking cap in the first embodiment of the present invention.

FIG. 11 is a schematic view showing the construction of the filter membrane, the bag turning tube and the operation member according to the first embodiment of the present invention.

Fig. 12 is a perspective view of the operating handle, vent assembly and locking cap of the first embodiment of the present invention.

Fig. 13A is an exploded perspective view of the operating handle, vent assembly and locking cap of the first embodiment of the present invention.

Fig. 13B is an enlarged view of a in fig. 13A.

FIG. 14 is a perspective view of an operating member according to a first embodiment of the present invention.

Fig. 15 is a schematic structural view of a bolt removal member, a portion of a tube assembly and a control member according to a first embodiment of the present invention.

Fig. 16 is a further exploded perspective view of the operating handle, vent assembly and locking cap of the first embodiment of the present invention.

Fig. 17 is a schematic structural view illustrating the matching between the limiting member and the first housing according to the first embodiment of the invention.

Fig. 18 is another exploded perspective view of the operating handle, vent assembly and locking cap of the first embodiment of the present invention.

Fig. 19 is an enlarged view of a in fig. 18.

Fig. 20 is a schematic structural view of the control member in the limit state according to the first embodiment of the present invention.

FIG. 21 is a schematic structural view of an operating member and a bag-flipping tube according to a second embodiment of the present invention.

FIG. 22 is a schematic structural view of an operating member and a bag-turning tube according to a third embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the embodiments of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like are based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be configured in a specific orientation, and operate, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, interchangeably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediate medium, or communicated between two elements. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.

In the field of interventional medical devices, the end of a medical device implanted in a human or animal body closer to an operator is generally referred to as the "proximal end", the end farther from the operator is referred to as the "distal end", and the "proximal end" and the "distal end" of any component of the medical device are defined according to this principle. "axial" generally refers to the length of the medical device as it is being delivered, and "radial" generally refers to the direction of the medical device perpendicular to its "axial" direction, and defines both "axial" and "radial" directions for any component of the medical device in accordance with this principle.

First embodiment

As shown in FIG. 1, the present embodiment provides a embolectomy device 100, which comprises an embolectomy element 10, a tube assembly 30 and an operating handle 50, wherein the embolectomy element 10 is connected with the distal end of the tube assembly 30, the operating handle 50 is connected with the proximal end of the tube assembly 30, and the shape and size of the embolectomy element 10 can be changed by operating the operating handle 50 on the tube assembly 30.

The embolectomy element 10 comprises a basket 11 and a filter membrane 13 connected to the basket 11, the filter membrane 13 being disposed within the basket 11.

The basket 11 has a lattice structure formed by cutting a metal tube, such as a nitinol tube or a stainless steel tube. The basket 11 may also be a grid structure cut from a polymeric tube, such as a polyester tube. As shown in fig. 1, when the basket 11 is subjected to a tensile force in its axial direction, the axial length of the basket 11 is elongated while the radial dimension is reduced to facilitate loading in a conveying device (not shown) for conveying. When the embolectomy element 10 is delivered to the target site, the embolectomy element 10 is pushed out of the delivery device, and the embolectomy element 10 changes from a radially compressed state to a radially expanded state.

In other embodiments, the basket 11 may be a mesh structure woven from woven filaments. The braided wire can be a metal wire or a polymer wire.

As shown in fig. 2 and 3, the proximal end of the basket 11 is an open end, and when the basket 11 is changed from a radially compressed state to a radially expanded state, the open end of the basket 11 is opened to intercept thrombus.

In one embodiment, the basket 11 is deformable by an external force. In the radial expansion state, when the basket 11 is subjected to axial extrusion force, the basket 11 can be further radially expanded, so that the radial size of the basket 11 is increased, and the open end with the larger radial size is attached to the vessel wall, thereby being beneficial to avoiding thrombus from escaping; on the other hand, the open end of the basket 11 can cut thrombus on the vessel wall to cut and collect the thrombus adhering to the vessel wall in the thrombus removal element 10. At the same time, the radially expanded basket 11 is formed with a tapered mesh lumen to allow more room for cut-off thrombus.

The basket 11 is deformable by an external force to further expand radially, so that the embolectomy device 100 can adapt to different individuals, and when the blood vessel of a patient is thin, the basket 11 does not need to be deformed to further expand radially, or the degree of further expansion radially is small.

As shown in fig. 3 and 4, the filter membrane 13 is disposed in the net cavity of the basket 11, and the filter membrane 13 is in a bag-like structure, i.e. a structure with one end open and the other end closed, so that thrombus can enter from the opening but can not pass through from the closed end. The open end of the filter membrane 13, i.e. the mouth 131, is located at the proximal end and the closed end opposite the mouth 131 is located at the distal end. The closed end of the filter membrane 13, i.e. the bag bottom 132, is located at the distal end opposite the bag mouth 131. A proximal pocket 131 in the filter membrane 13 is connected to the basket 11 to allow thrombus to enter the filter membrane 13. The bag mouth 131 of the filter membrane 13 is sewn on the basket 11 through a suture, when the basket 11 is radially expanded, the bag mouth 131 of the filter membrane 13 can be driven to be opened, a thrombus can enter the filter membrane 13, and when the basket 11 is radially contracted, the radial size of the bag mouth 131 of the filter membrane 13 can be driven to be reduced. The filter membrane 13 has a microporous structure with a pore size of 50-500 μm so that blood can flow through the filter membrane 13 but thrombus cannot flow through the filter membrane 13. The filter membrane 13 is tapered to conform to the shape of the basket 11.

The tube assembly 30 is located between the thrombus removal element 10 and the operating handle 50, as shown in fig. 5 and 6, the tube assembly 30 comprises an inner core tube 31, a bag overturning tube 33, a base tube 35 and an outer tube 37 which are nested from inside to outside, the base tube 35 is sleeved outside the bag overturning tube 33, and the bag overturning tube 33 can axially slide relative to the base tube 35. The inner core tube 31 is provided with a bag turning tube 33, and the bag turning tube 33 can axially slide relative to the inner core tube 31. The outer tube 37 is sleeved outside the base tube 35, and the outer tube 37 can axially slide relative to the base tube 35. The far end of the inner core tube 31 is farther than the far ends of other tubes in the tube assembly 30, the far end of the inner core tube 31 is connected with the far end of the basket 11, the near end of the inner core tube 31 is connected with the operating handle 50, the far end of the base tube 35 is connected with the near end of the basket 11, the near end of the base tube 35 is connected with the operating handle 50, when the far end of the inner core tube 31 and the far end of the base tube 35 are relatively close to each other through the operating handle 50, the basket 11 is deformed, namely the axial length of the basket 11 is shortened, the radial size of the basket 11 is expanded, and the basket 11 is changed to be in a further radial expansion state.

The far end of the bag-turning tube 33 is connected with the bag bottom 132 of the filter membrane 13, the near end of the bag-turning tube 33 is connected with the operating handle 50, and since the bag mouth 131 of the filter membrane 13 is connected with the basket 11, as shown in fig. 7, when the far end of the bag-turning tube 33 is operated by the operating handle 50 (not shown in fig. 7) to move towards the near end, the bag bottom 132 of the filter membrane 13 can be driven to turn towards the near end, so as to clean the thrombus collected in the filter membrane 13.

As shown in FIG. 8, a proximal end of basepipe 35 is provided with an exhaust assembly 351, exhaust assembly 351 including a head end fitting 353, a first hose 355 and a first exhaust valve 357. Head end fitting 353 is disposed at a proximal end of base tube 35, head end fitting 353 is connected to operating handle 50, and base tube 35 is connected to operating handle 50 through head end fitting 353. First hose 355 is disposed on the periphery of head-end joint 353, first hose 355 is connected to base pipe 35 via head-end joint 353, and first hose 355 and base pipe 35 communicate with each other. First exhaust valve 357 is provided at an end of first hose 355, and when first exhaust valve 357 is opened, air in base pipe 35 can be exhausted by injecting physiological saline into first hose 355. The distal end of the head end fitting 353 is provided with an internally threaded locking cap 359, and the locking cap 359 is rotatably connected to the head end fitting 353.

The length of the outer tube 37 is smaller than the lengths of the inner core tube 31, the bag-overturning tube 33 and the base tube 35. As shown in fig. 9, an outer tube joint 371 is disposed at a proximal end of the outer tube 37, a second flexible tube 373 is disposed on a peripheral side of the outer tube 37, the second flexible tube 373 is communicated with the outer tube 37, a second exhaust valve 375 is disposed at a distal end of the second flexible tube 373, and when the second exhaust valve 375 is opened, air in the outer tube 37 can be exhausted by injecting physiological saline into the second flexible tube 373. The proximal end of the outer tube connector 371 is provided with an outer tube connector 379, and the proximal end of the outer tube connector 379 is provided with external threads which are in threaded fit with the locking cap 359. Referring to fig. 2 and 9, the base pipe 35 is inserted through the outer pipe 37, the proximal end of the outer pipe connector 379 is threadedly engaged with the locking cap 359, and the outer pipe 37 is releasably connected to the operating handle 50 by the outer pipe connector 379. When the thrombus removal element 10 needs to be conveyed, the distal end of the inner core tube 31 and the distal end of the base tube 35 are away from each other, so that the outer diameter of the thrombus removal element 10 becomes smaller, the outer tube 37 is separated from the operating handle 50, and the inner core tube 31, the bag overturning tube 33 and the base tube 35 synchronously move towards the proximal end relative to the outer tube 37, so that the thrombus removal element 10 is accommodated in the tube cavity of the outer tube 37, and the conveying is facilitated. When the thrombus removal element 10 is conveyed to a target site, the inner core tube 31, the bag overturning tube 33 and the base tube 35 are synchronously moved towards the far end relative to the outer tube 37, so that the thrombus removal element 10 is exposed in a blood vessel, if necessary, the far end of the inner core tube 31 and the far end of the base tube 35 are mutually close to each other, so that the mesh basket 11 is further radially expanded, so as to cut and collect thrombus, and the outer tube connecting piece 379 is in locking connection with the locking cap 359 in the thrombus cutting process.

As shown in fig. 10, the operating handle 50 includes a housing assembly 51 and an operating member 53 movably provided on the housing assembly 51. As shown in FIG. 11, the actuator 53 is coupled to the bag bottom 132 of the filter membrane 13, and when the actuator 53 moves axially relative to the housing assembly 51, the actuator 53 causes the bag bottom 132 to flip proximally relative to the bag opening 131 and return to the initial state. Because the bag mouth 131 of the filter membrane 13 is connected with the basket 11, the operating part 53 moves along a direction (near end), and can drive the bag bottom 132 to turn towards the near end relative to the bag mouth 131, so that the bag bottom 132 is completely turned towards the outside, thrombus in the filter membrane 13 can be poured out, and the filter membrane 13 can be cleaned conveniently, so that the thrombus on the filter membrane 13 and the basket 11 can be cleaned; when thrombus clearing is completed, the operating member 53 is moved in the opposite direction (distal direction) to move the filter membrane 13 back to the initial state (the state where the bag mouth 131 is located at the proximal end and the bag bottom 132 is located at the distal end, which is the state during thrombus removal), so that thrombus removal can be performed easily in the blood vessel again. In this embodiment, through clearing up the thrombus after turning over filter membrane 13, can clear up fast, conveniently to operate filter membrane 13 through operating handle 50 in this embodiment, can accomplish the upset with filter membrane 13 fast, thereby practice thrift operating time.

Specifically, as shown in fig. 12 and 13A, the housing assembly 51 includes a first housing 511 and a second housing 512, the first housing 511 is connected to the second housing 512 to form a handle cavity 513, a sliding slot 514 and a strip-shaped slot 515 are formed at a connection position of the first housing 511 and the second housing 512, the sliding slot 514 and the strip-shaped slot 515 are both communicated with the handle cavity 513, and the sliding slot 514 and the strip-shaped slot 515 are separated by a barrier 516. In this embodiment, the operating member 53 is partially received in the housing assembly 51, at least a portion of the operating member 53 extends from the handle cavity 513 along the sliding slot 514, and the operating member 53 is axially slidable along the sliding slot 514. The axial sliding of the operating member 53 along the slide groove 514 causes the bag bottom 132 of the filter membrane 13 to move. In other embodiments, the operating member 53 may be rotatably disposed on the housing assembly 51, and it will be appreciated that in such embodiments, the housing assembly 51 is provided with a member that cooperates with the operating member 53 to cause the operating member 53 to rotate relative to the housing assembly 51 to move the bag bottom 132 of the filter membrane 13.

Specifically, referring to fig. 11 and 13A, the proximal end of bag flipping tube 33 is connected to the operating member 53 in the handle cavity 513 such that the operating member 53 is coupled to the bag bottom 132 via the bag flipping tube 33. When the operation member 53 slides proximally relative to the housing member 51, the bag-turning tube 33 is driven to slide proximally, so as to drive the bag bottom 132 of the filter membrane 13 to move proximally, so that the bag bottom 132 is turned proximally to clean thrombus on the filter membrane 13, and the operation member 53 slides in a reverse direction, so as to drive the filter membrane 13 to return to the initial state by turning the bag tube 33.

As shown in fig. 13A, the operating handle 50 further includes a linearly extending guide 55 disposed within the handle chamber 513. The guide member 55 is a tubular structure, an extending groove 551 is formed on the tube wall of the guide member 55, the extending groove 551 extends along the axial direction, and the extending groove 551 is communicated with the tube cavity of the guide member 55. In other embodiments, the guide 55 may be formed by connecting two arc-shaped housings with each other, and the extension groove 551 is formed at the connecting portion of the two arc-shaped housings.

As shown in fig. 13A and 14, the operating member 53 includes the noose 531 connected to each other and two connecting portions 532 connected to the noose 531, the two connecting portions 532 being located on both sides of the noose 531. The noose 531 is slidably sleeved on the guide 55, the two connecting portions 532 extend out of the sliding slot 514 to the outside of the housing assembly 51, and the noose 531 slides linearly along the guide 55, so that the operating member 53 is prevented from being stuck during the sliding process.

The operating member 53 further includes two operating caps 533 connected to the two connecting portions 532 in a one-to-one correspondence, the operating caps 533 are located outside the housing assembly 51, and the operating member 53 can be slid by applying a force to the operating caps 533 during operation.

The operating member 53 further comprises a connector 534, the connector 534 is connected to an inner wall of the noose 531, and when the noose 531 is fitted on the guide member 55, the connector 534 is at least partially received in the inner cavity of the guide member 55. The adapter tube 534 is connected to the bag-flipping tube 33 such that when the operating member 53 slides axially along the slide slot 514, the bag-flipping tube 33 slides axially to flip the bag bottom 132 of the filter membrane 13 proximally.

The proximal end of the basket 11 is axially fixed relative to the housing assembly 51. As shown in fig. 12 and 13A, the operating handle 50 further includes a control member 57, a portion of the control member 57 is received in the handle chamber 513, another portion of the control member 57 extends out of the housing assembly 51 along the strip-shaped groove 515, the control member 57 is slidably disposed on the housing assembly 51, and the control member 57 is axially slidable within the length of the strip-shaped groove 515. As shown in fig. 13B, a slope 571 is disposed on a side of the control member 57 facing the first housing 511, the slope 571 is received in the handle chamber 513, and a distance from the slope 571 to a bottom surface of the control member 57 (i.e., a side of the control member 57 facing away from the first housing 511) gradually increases along a direction from the distal end to the proximal end. Since the distal end of the base pipe 35 is connected to the proximal end of the basket 11, and the proximal end of the base pipe 35 is connected to the operating handle 50. In addition, as shown in fig. 15, the control member 57 is coupled to the distal end of the basket 11, and when the control member 57 is axially moved relative to the housing assembly 51, the basket 11 is axially contracted and extended, so that the control member 57 causes the basket 11 to radially contract and radially expand. Specifically, the control member 57 is connected to the proximal end of the inner core tube 31, so that the control member 57 is interlocked with the distal end of the basket 11 through the inner core tube 31, that is, by controlling the distal end of the inner core tube 31 and the distal end of the base pipe 35 to approach or separate from each other to control the axial contraction and elongation of the basket 11.

As shown in fig. 16, the operating handle 50 further includes a control spring 58, the control spring 58 is elastically connected between the guide member 55 and the control member 57, the control spring 58 is located at a distal end of the control member 57 and abuts against the control member 57, and the elastic force applied by the control spring 58 enables the control member 57 to maintain a constant position when not subjected to a force, so as to maintain a constant relative position of the distal end of the inner core tube 31 and the distal end of the base tube 35, thereby maintaining the mesh basket 11 in a radially expanded state. When the control member 57 slides distally, the distal end and the proximal end of the basket 11 are moved away from each other to radially contract the basket 11; when the control member 57 is slid proximally, the distal end and proximal end of the basket 11 are brought closer together to radially expand the basket 11.

As shown in fig. 17, the operation handle 50 further includes a limiting member 59 disposed on the housing assembly 51, a portion of the limiting member 59 penetrates the housing assembly 51 and enters the handle cavity 513, and when the control member 57 is located at the farthest end of the sliding range, the limiting member 59 can axially limit the control member 57, so as to prevent the control member 57 from compressing the control spring 58 and sliding proximally by a misoperation, and further keep the state that the net basket 11 is radially contracted, thereby facilitating the state that the bolt taking element 10 is kept in a smaller outer diameter state for delivery.

Referring to fig. 17 to fig. 19, in particular, the position-limiting member 59 includes a position-limiting bolt 591 and a position-limiting spring 592, where the position-limiting bolt 591 is a straight rod, slidably inserted on the housing assembly 51, and at least a portion of the straight rod enters the handle cavity 513, and extends into a supporting portion 591a provided at one end of the handle cavity 513. The limiting spring 592 is received in the handle cavity 513, the limiting spring 592 is sleeved outside the limiting bolt 591, and the limiting spring 592 elastically abuts between the first housing 511 and the abutting portion 591 a.

When it is required to switch the basket 11 to a state of a smaller diameter, the control member 57 is slid distally along the bar-shaped groove 515 by applying a pushing force to the control member 57 in a distal direction, and after the control member 57 is moved to the inclined surface 571 to contact the limit bolt 591, the limit bolt 591 is slid along the inclined surface such that the axial sliding of the control member 57 in the distal direction is not restricted by the limit bolt 591. As shown in fig. 20, after the control member 57 slides distally to pass over the limit bolt 591, the limit bolt 591 abuts on the proximal end of the control member 57 under the elastic force of the limit spring 592, thereby limiting the position of the control member 57 and preventing the control member 57 from sliding proximally under the control spring 58, so that the basket 11 is maintained in a state of a small radial dimension.

In this state, the plug-removing member 10 can be pulled axially in a direction to approach the outer tube 37 to accommodate the plug-removing member 10 in the outer tube 37. After the thrombectomy member 10 is delivered to the target site through the outer tube 37, the thrombectomy member 10 is pushed out of the outer tube 37, and the thrombectomy member 10 is restored to a state of small radial dimension before being loaded in the outer tube 37. When it is desired to further radially expand the embolectomy element 10, the stop pin 591 is pulled upward to release the limiting effect of the stop pin 591 on the control member 57, so that the stop pin 591 can move proximally under the elastic force of the control spring 58 to further radially expand the embolectomy element 10.

The stop member 59 further comprises a stop cap 593, the stop cap 593 being associated with a stop bolt 591, the stop cap 593 being located outside the housing assembly 51, the stop bolt 591 being liftable by means of the stop cap 519, so as to cancel the stop action on the control member 57 and thus allow the control member 57 to move proximally under the thrust of the control spring 58.

Second embodiment

The present embodiment is different from the first embodiment in the manner of connecting the operating member 63 to the housing assembly. Specifically, as shown in fig. 21, the operation member 63 is rotatably disposed on the housing assembly, the operation member 63 is a gear rotatably disposed in the handle cavity, the rotation axis of the operation member 63 is perpendicular to the axis of the operation handle, the proximal end of the bag-turning tube 73 is provided with a rack 731 engaged with the gear, and the operation member 63 rotates relative to the housing assembly to drive the rack 731 to move, so as to drive the bag-turning tube 73 to move.

Third embodiment

The present embodiment is different from the first embodiment in the way of connecting the operating member 83 to the housing assembly. Specifically, as shown in fig. 22, the operation member 83 is a knob rotatably disposed on the housing assembly, an axis of the knob coincides with or is parallel to an axis of the housing assembly, the knob is provided with an internal thread 831, a slide block 931 is disposed at a proximal end of the bag-turning tube 93, an external thread threadedly engaged with the knob is disposed on an outer surface of the slide block 931, and the rotation of the knob along a circumferential direction of the operation handle 50 can drive the slide block 931 to move axially along the operation handle 50, so as to drive the bag-turning tube 93 to move axially along the operation handle 50.

All possible combinations of the technical features of the above embodiments may not be described for the sake of brevity, but should be considered as within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.

Claims (13)

1. The utility model provides a thrombectomy device, includes operating handle and thrombectomy component, its characterized in that, thrombectomy component includes basket and the filter membrane that is used for accomodating the thrombus, the near-end of basket is the open end, the filter membrane is bag-shaped structure, have the sack and with at the bottom of the bag that the sack is relative, under initial condition, the filter membrane set up in the basket, the sack of filter membrane with the basket links to each other, just the sack is located the near-end, be located the distal end at the bottom of the bag, operating handle includes casing assembly and locates with moving about operating parts on the casing assembly, the operating parts with the linkage at the bottom of the bag of filter membrane, the operating parts for during casing assembly axial displacement, the operating parts can drive at the bottom of the bag for the sack is to near-end upset and resume to initial condition.

2. The embolectomy device of claim 1, wherein the housing assembly defines a handle lumen, the embolectomy device further comprising a tube assembly comprising a bag-flipping tube, a distal end of the bag-flipping tube being attached to the bag bottom of the filter membrane, and a proximal end of the bag-flipping tube being positioned within the handle lumen and attached to the operating member.

3. The embolectomy device of claim 2 wherein the housing assembly has a chute that extends through the handle cavity, at least a portion of the operating member extends from the handle cavity along the chute, and movement of the operating member along the chute moves the bag turnover tube.

4. The embolectomy device of claim 3, wherein the housing assembly comprises a first housing and a second housing, the first housing being connected to the second housing and forming the handle lumen, the junction of the first housing and the second housing forming the chute.

5. The embolectomy device of claim 4 wherein the operating handle further comprises a guide member disposed within the handle lumen, and wherein the operating member comprises a noose slidably disposed on the guide member and a connecting portion connected to the noose, the connecting portion extending from the chute to the exterior of the housing assembly.

6. The embolectomy device of claim 5, wherein the guide member is a tubular structure, an extension groove is formed in a tube wall of the guide member, the extension groove extends axially, the extension groove is communicated with a tube cavity of the guide member, the operation member further comprises a connecting tube structure, the connecting tube structure is connected with an inner wall of the lasso, the connecting tube structure is at least partially contained in the tube cavity of the guide member, and the connecting tube structure is connected with a proximal end of the bag overturning tube.

7. The embolectomy device of claim 2 wherein the actuator comprises a gear disposed within the handle lumen, the gear being rotatable relative to the housing assembly, the proximal end of the bag-inverting tube being provided with a rack engaging the gear, rotation of the gear relative to the housing assembly driving movement of the rack to move the bag-inverting tube.

8. The embolectomy device of claim 4 wherein the proximal end of the basket is axially fixed relative to the housing assembly, and wherein the actuating handle further comprises a control member slidably disposed on the housing assembly, the control member being in communication with the distal end of the basket, the control member being configured to cause radial contraction and radial expansion of the basket upon axial movement of the control member relative to the housing assembly.

9. The embolectomy device of claim 8, wherein the operating handle further comprises a control spring, the control spring is received in the housing assembly, and the control spring is located at a distal end of the control member and abuts against the control member.

10. The embolectomy device of claim 9, wherein the operating handle further comprises a stop disposed on the housing assembly, a portion of the stop extending from an exterior of the housing assembly into the handle lumen to axially stop the control member.

11. The embolectomy device of claim 10, wherein the position limiter comprises a position limiting bolt and a position limiting spring, the position limiting bolt is slidably inserted into the housing assembly, at least a part of the position limiting bolt enters the handle cavity, one end of the position limiting bolt extending into the handle cavity is provided with a supporting part, the position limiting spring is accommodated in the handle cavity, and the position limiting spring elastically supports between the first housing and the supporting part.

12. The embolectomy device of claim 11 wherein the stop further comprises a stop cap, the stop cap being fixedly attached to the stop bolt, the stop cap being located outside the housing assembly.

13. The embolectomy device of claim 8, wherein the tube assembly further comprises a base tube and an inner core tube, the base tube is sleeved outside the bag overturning tube, the proximal end of the base tube is connected with the shell assembly, the distal end of the base tube is connected with the proximal end of the basket, the inner core tube penetrates through the bag overturning tube, the proximal end of the inner core tube is connected with the control element, and the distal end of the inner core tube is connected with the distal end of the basket.

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