CN111067661B

CN111067661B - Handle structure, catching device with handle structure and filter system

Info

Publication number: CN111067661B
Application number: CN201911260833.0A
Authority: CN
Inventors: 邱礼彪
Original assignee: Lifetech Scientific Shenzhen Co Ltd
Current assignee: Lifetech Scientific Shenzhen Co Ltd
Priority date: 2019-12-10
Filing date: 2019-12-10
Publication date: 2022-05-20
Anticipated expiration: 2039-12-10
Also published as: CN111067661A

Abstract

The invention relates to a handle structure, a catching device with the handle structure and a filter system, wherein the handle structure comprises a control lever and a handle which are connected, and the handle comprises a locking cover, a connecting piece, a rotating piece, a handheld part and a sliding block; the operating rod respectively follow the locking lid with pass in the connecting piece, the locking lid is connected to the connecting piece, and radial extrusion the connecting piece makes the connecting piece with operating rod fastening connection, handheld portion is connected to the connecting piece, the connecting piece includes the main part, the rotatable being located of rotating member the main part with between the handheld portion, the rotating member drives when rotating slider axial displacement. The invention has the beneficial effects that: the handle is simple in structure, convenient to assemble and easy to operate.

Description

Handle structure, catching device with handle structure and filter system

Technical Field

The invention relates to the technical field of implanted medical instruments, in particular to a handle structure, a catching device with the handle structure and a filter system.

Background

Pulmonary embolism is a clinical and pathophysiological syndrome of pulmonary circulatory disturbance caused by the blockage of the main trunk or branch of pulmonary artery by endogenous or exogenous emboli, and the disease can involve important organs such as brain, heart, kidney and the like, and even involve the whole circulation and respiratory system to cause life risks. In the existing treatment methods, a temporary vena cava filter (hereinafter referred to as a filter) is implanted into a blood vessel, and the filter is used for intercepting large thrombus to prevent the large thrombus from blocking the blood vessel at important visceral organs and other positions, so that the visceral organs of a patient are prevented from being damaged by oxygen deficiency. The filter has a simple structure, is fixed on the vessel wall by self-expansion, and is removed after the lesion is relieved or relieved.

At present, a capture device is adopted for recovering the filter clinically, the capture device comprises a capture ring and a control lever connected with the capture ring, the capture ring is connected with a recovery hook of the filter during recovery, and then the filter is recovered. However, in clinical use of the trap, the trap ring and the recovery hook of the filter are easily released, resulting in failure of recovery of the filter.

Disclosure of Invention

In view of the above, there is a need for a handle structure, a capture device having the handle structure, and a filter system, so as to solve the problem that the capture device and the filter are easy to be released during the recovery process.

The invention provides a handle structure, which comprises an operating lever and a handle which are connected, wherein the handle comprises a locking cover, a connecting piece, a rotating piece, a handheld part and a sliding block; the operating rod passes in the locking lid with the connecting piece respectively, the locking lid is connected to the connecting piece, and radial extrusion the connecting piece makes the connecting piece with operating rod fastening connection, handheld portion is connected to the connecting piece, the connecting piece includes the main part, the rotatable being located of rotating member the main part with between the handheld portion, the rotating member drives when rotating slider axial displacement.

In the handle structure, the number of the connecting pieces comprises at least two, at least two connecting pieces are arranged at intervals along the circumferential direction, the operating rod extends into the space between the at least two connecting pieces, and the locking cover is sleeved outside the connecting pieces and radially extrudes the at least two connecting pieces.

In the handle structure, the locking cover comprises a through hole and a threaded hole which are communicated, the connecting piece is provided with a clamping groove and a thread matched with the threaded hole, and the operating rod extends into the clamping groove through the through hole.

In the handle structure, a conical surface is arranged in the locking cover, the conical surface is adjacent to one side, back to the through hole, of the threaded hole, an inclined surface is arranged on the connecting piece, the inclination angle of the conical surface is smaller than that of the inclined surface, and when the locking cover is sleeved on the connecting piece, the conical surface radially extrudes the inclined surface, so that the operating lever is clamped and fixed between at least two connecting pieces.

In the handle structure of the invention, the connecting piece further comprises a guide rail connected to the main body, the slider is provided with a sliding hole, and the guide rail passes through the sliding hole and is fixedly connected with the handheld part.

In the handle structure of the invention, the handheld part is provided with a slot, and the guide rail extends into the slot and is fixedly connected with the handheld part.

In the handle structure, the rotating piece is sleeved outside the sliding block through a thread structure.

The invention also provides a catching device which comprises a catching device and the handle structure, wherein the catching device comprises a catching piece, an inner cavity penetrating along the axial direction is arranged in the operating rod, the catching piece is movably positioned in the inner cavity, one end of the catching piece penetrates out of the inner cavity and is fixed at the far end of the operating rod, the other end of the catching piece penetrates out of the near end of the operating rod through the inner cavity and is fixedly connected with the sliding block, and the sliding block drives the catching piece to axially move together, so that the catching piece is formed into a catching ring with an adjustable inner diameter.

In the catching device, the catcher further comprises a spring pipe, and the spring pipe is sleeved outside the catching ring.

The invention also provides a filter system comprising a catching device as described above.

The invention provides a handle structure, a catching device with the handle structure and a filter system, the handle structure is simple, the assembly is convenient, the operation is simple, a sliding block in the handle structure can move along the axial direction only by rotating a rotating piece, so that a catching piece connected to the sliding block is driven to move along the axial direction, the catching piece is provided with a catching ring with an adjustable inner diameter, after the catching ring is sleeved on a recovering piece of a filter, the catching ring can be integrally contracted, the catching ring and the recovering piece are tightly connected together, the catching ring and the recovering piece are prevented from being separated in the recovering process, and the success rate of recovering the filter is improved.

Drawings

FIG. 1 is a schematic diagram of a filter system according to one embodiment;

FIG. 2 is a schematic diagram of a strainer system according to an embodiment;

FIG. 3 is a schematic diagram of the main structure of the strainer shown in FIG. 2;

FIG. 4(a) is a schematic view of a configuration of a catcher of a catching device in the filter system of the embodiment;

figure 4(b) is a schematic view of the construction of the spring tube in the trap shown in figure 4 (a);

FIG. 4(c) is a schematic cross-sectional view of the spring tube shown in FIG. 4 (b);

figure 4(d) is a schematic view of the structure of the catch in the catch shown in figure 4 (a);

FIG. 5 is a schematic view of a joystick of the strainer system in one embodiment, showing a schematic view of a cross-section of the joystick at C-C;

FIG. 6 is a schematic view of the assembly of the catch and the lever of the catch device of the filter system of FIG. 1;

FIG. 7 is a schematic view of the capture device of the filter system of FIG. 1;

FIG. 8 is a schematic view of the locking cap of the capture device of the strainer system of FIG. 7;

FIG. 9 is a schematic view of the connection of the capture device of the filter system of FIG. 7;

FIG. 10 is a schematic view of the rotary member of the capturing device of the filter system shown in FIG. 7;

FIG. 11 is a schematic view of the hand-held portion of the capture device of the filter system of FIG. 7;

fig. 12 is a partially enlarged view of the structure of the circle portion in fig. 7.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

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.

Example one

Referring to fig. 1, a filter system 100 in one embodiment includes a filter 10 and a capture device 20.

The filter 10 is used for being implanted into a blood vessel, and has the effect of filtering blood by intercepting large thrombus, so as to prevent the thrombus from blocking the blood vessel at the position of important visceral organs and the like to cause the hypoxia damage of the visceral organs.

Referring to fig. 2, the strainer 10 includes a main body structure 12 and a recovery member 11 attached to an end of the main body structure 12.

In some embodiments, the main body structure 12 is formed by cutting and shaping a tube material with superior self-expansion performance, such as a nitinol tube, for example, as shown in fig. 3, the main body structure 12 is formed by cutting and shaping a nitinol tube, and includes a first connecting member 121, a second connecting member 123, and a plurality of supporting rods 122 connected between the first connecting member 121 and the second connecting member 123. The number of the supporting rods 122 may be 3 or more than 3, and is not limited herein. The support rod 122 includes a first filter screen, a second filter screen and a support portion connected between the first filter screen and the second filter screen, the first filter screen is fixedly connected to the first connector 121, the second filter screen is fixedly connected to the second connector, and after the filter 10 is released, the support portion abuts against the inner wall of the blood vessel to fix the filter 10 in the blood vessel.

The outer diameter of the tubing used to form the body structure 12 may be from 0.2mm to 4mm, and the dimensions of the tubing used to form the body structure 12 are not limited thereto.

The retriever 11 may be connected to the first connector 121 or the second connector 123 of the body structure 12 by welding, screwing, etc., and is used for catching the catching means 20 so that the catching means 20 can pull the filter 10 to move.

In this embodiment, the filter 10 is a frame filter with two closed ends, and those skilled in the art will appreciate that the closed frame filter of this embodiment is merely used as an example, and in other embodiments, the filter may be a single umbrella open filter. Wherein, single umbrella open filter includes many spinal branchs vaulting pole, and the one end of many spinal branchs vaulting pole is the open end, and the other end gathers together and retrieves the piece and be connected.

Referring again to fig. 1, the capture device 20 includes a connected capture 21 and handle structure including a connected joystick 22 and handle 230.

As shown in fig. 4(a) and 4(d), the catcher 21 is used for catching the recovery member 11 of the filter 10, the catcher 21 includes a spring tube 211 and a catcher 212, a distal end of the catcher 212 is provided with a catching ring 2123 with an adjustable inner diameter, the catching ring 2123 is a split ring, and the spring tube 211 is sleeved outside the catching ring 2123. The capture 212 may be formed from a single filament of nickel titanium or stainless steel, a plurality of strands of nickel titanium or stainless steel, or a flat ribbon of nickel titanium or stainless steel.

In some embodiments, the capture ring 2123 is pre-shaped into a quasi-circular ring, and the capture ring 2123 automatically returns to the quasi-circular ring when the capture 21 is released from the sheath. The spring tube 211 is fitted over the catch ring 2123 of the catch 212, and due to the elastic deformability of the spring tube 211, the spring tube 211 can deform along with the catch ring 2123 when the inner diameter surrounded by the catch ring 2123 is reduced.

In some embodiments, as shown in connection with fig. 2, the retriever 11 is hook-shaped, having a distally directed opening, so that it is caught by the catching means 20. After the catching ring 2123 is fitted around the recovering member 11, the catching ring 2123 is integrally contracted, that is, the inner diameter of the ring surrounded by the catching ring 2123 is reduced, and the catching ring 2123 and the recovering member 11 are tightly connected together, so that the catching ring 2123 is prevented from being separated from the recovering member 11, and the recovery success rate of the filter 10 is improved.

As shown in connection with fig. 4(b), the spring tube 211 has opposite first and

second ends

2111, 2112, with at least one of the first and

second ends

2111, 2112 being secured to the catch ring 2123 so that the spring tube 211 better contracts with the catch ring 2123 during contraction of the inner diameter encompassed by the catch ring 2123 as the catch 212 is drawn.

Fig. 4(c) is a schematic cross-sectional view of the spring tube 211, wherein the spring tube 211 is made of a material with good shape memory, such as nitinol. In some embodiments, the spring tube 211 is pre-shaped like a circular ring, and because the spring tube 211 has a good shape memory, when the capture device 21 is released from the sheath, the spring tube 211 automatically returns to like a circular ring and makes the capture ring 2123 enclosed therein to be like a circular ring, the spring tube 211 can prevent the capture ring 2123 from deforming under the impact of blood flow, so that the capture ring 2123 maintains a larger inner diameter for being sleeved on the filter 10 for capture.

It should be noted that the spring tubes 211, when fitted over the capture ring 2123 of the capture 212, increase the overall size of the capture ring 2123, thereby increasing the detectability of the capture ring 2123 under x-rays and allowing accurate fitting of the capture ring 2123 over the retriever 11 during retrieval.

Referring to fig. 5, the control rod 22 has opposite distal 221 and proximal 222 ends, and the control rod 22 has first 223 and second 224 lumens formed therein. A first lumen 223 extends through the distal end 221 and proximal end 222 of the shaft 22, and a second lumen 224 extends through at least the distal end 221 of the shaft 22. Referring to fig. 4(d), 5 and 6, the catch 212 has opposite distal and

proximal ports

2121 and 2122, and when the lever 22 and the catch 21 are engaged, the second lumen 224 secures the distal port 2121 of the catch 212, the catch 212 is axially movably disposed through the first lumen 223, and the proximal port 2122 of the catch 212 exits the proximal end 222 of the lever 22, such that the catch 212 forms the catch loop 2123 on the distal side of the lever 22.

The proximal end 222 of the shaft 22 is connected to the handle 230, the proximal port 2122 of the catch 212 extends through the proximal end 222 of the shaft 22 and is connected to the handle 230, and the catch 212 is axially movable within the shaft 22 upon actuation of the handle 230 to adjust the size of the inner diameter encompassed by the catch ring 2123.

As shown in fig. 7, the handle 230 includes a locking cover 231, a connecting member 232, a rotating member 233, a hand grip 234, and a slider 236.

The locking cover 231 is in threaded fit with the connecting member 232, and can radially press the connecting member 232, so that the connecting member 232 clamps and fixes the operating lever 22 passing through the connecting member 232. The catch 212 is fixedly connected to the slider 236, and the slider 236 can drive the catch 212 to axially move in the operating rod 22 under the driving of the rotating member 233, so as to adjust the size of the catch ring 2123 of the catch 212 to meet the catching requirement.

As shown in fig. 8, the locking cap 231 includes a through hole 2311, a threaded hole 2312, and a tapered surface 2313. The through hole 2311 axially penetrates through the locking cover 231 to communicate with the threaded hole 2312, and the tapered surface 2313 is adjacent to the threaded hole 2312 on the side opposite to the through hole 2311. The lever 22 can pass through the through hole 2311 so that the lever 22 is connected to the handle 230.

In some embodiments, in conjunction with fig. 7 and 9, there are two connecting members 232, and the two connecting members 232 are spaced apart from each other. Each connecting member 232 includes a main body and a guide rail 2324, the main body is provided with a clamping groove 2321, a thread 2322, a slope 2323 and an end face 2325. The operating lever 22 passes through the clamping groove 2321 of the two connecting members 232, and the threads 2322 of the two connecting members 232 are engaged with the threaded hole 2312 of the locking cover 231, so that the two connecting members 232 are connected into a whole under the locking of the locking cover 231, and thus the operating lever 22 can pass through the clamping groove 2321 of the two connecting members 232 and is clamped and fixed by the two connecting members 232.

It should be noted that the inclination angle of the tapered surface 2313 is smaller than that of the inclined surface 2323, that is, the included angle between the tapered surface 2313 and the vertical direction is smaller than that between the inclined surface 2323 and the vertical direction. Thus, during the assembly of the locking cover 231 with the two connection members 232, the two connection members 232 exert a sufficient radial clamping force on the operating rod 22 passing through the clamping groove 2321 under the radial pressing of the locking cover 231, thereby firmly fixing the operating rod 22 between the two connection members 232.

It will be appreciated that the present application is not limited to the particular manner in which the connector 232 is securely connected to the lever 22. For example, in other embodiments, the main body of the connecting member 232 is made of an elastic material such as silicon, when the locking cover 231 is sleeved on the main body of the connecting member 232, the locking cover 231 radially presses the main body of the connecting member 232, and the main body of the connecting member 232 is elastically deformed, so that the connecting member 232 is tightly connected with the operating lever 22.

As shown in fig. 10, the rotary member 233 has a hollow tubular structure, and an internal thread 2331 is formed therein. A boss 2332 is provided on the outer portion of the rotary member 233, and the boss 2332 facilitates an operator to apply an external force to the rotary member 233 to perform a rotating operation on the rotary member 233, thereby screwing the transmission slider 236 through the internal thread 2331 to move axially.

Specifically, as shown in fig. 12, the slide block 236 is provided with a guide hole 2361, a slide hole 2362, and an external thread 2363. Wherein the guide hole 2361 is configured to allow the catch 212 in the operating lever 22 to pass through, and the catch 212 is fixed in the guide hole 2361, i.e., the catch 212 is fixedly connected to the slider 236, such that the catch 212 moves with the slider 236 when the slider 236 moves along the guide rail 2324. The slide hole 2362 is engaged with the guide rail 2324 of the link 232 so that the slider 236 can slide along the guide rail 2324 relative to the link 232.

The external thread 2363 of the slider 236 is engaged with the internal thread 2331 of the rotary member 233, so that the slider 236 moves along the guide 2324 when the rotary member 233 rotates. The catch 212, which is coupled within the operating lever 22, passes through the guide hole 2361 and is fixedly coupled to the guide hole 2361 such that the catch 212 can move with the slider 236.

It should be noted that the number of the sliding holes 2362 on the sliding block 236 is adapted to the guide rail 2324, so that the sliding holes 2362 are slidably engaged with the guide rail 2324 correspondingly. For example, each connecting member 232 has 1 guide rail 2324, and the sliding block 236 has two sliding holes 2362 respectively engaged with the two guide rails 2324. The number of the slide blocks 236 and the slide holes 2362 may be 3 or more, and is not limited herein.

As shown in fig. 11, the handheld portion 234 is provided with a slot 2341, and the guide rails 2324 of the two connecting members 232 are respectively and fixedly inserted into the slot 2341 of the handheld portion 234, so that the connecting members 232 are fixedly connected with the handheld portion 234.

It should be noted that the hand-held portion 234 and the end face 2325 of the connecting member 232 are disposed at an interval to form a disposition space for accommodating the rotating member 233 and axially limiting the rotating member 233, specifically, the rotating member 233 is disposed between the end face 2325 of the connecting member 232 and the hand-held portion 234, and is axially limited therebetween, and can only axially rotate around the shaft, so that when the rotating member 233 rotates, the rotating member 233 is screwed to drive the slider 236 in threaded engagement therewith to move along the guide rail 2324, so that the slider 236 drives the catching member 212 to axially move in the operating lever 22, so as to adjust the inner diameter surrounded by the catching ring 2123, and meet the catching requirement.

The following description will be made by way of example only, but the present invention is not limited to the catching device 20, and the catching device 20 of the present embodiment may be assembled by other means.

First, the catch 212 is threaded into the spring tube 211, the distal port 2121 of the catch 2121 is secured to the second lumen 224 of the steering shaft 22, and the proximal port 2122 passes through the first lumen 223 of the steering shaft 22. In a second step, the distal end 222 of the operating rod 22 is inserted through the through hole 2311 of the locking cap 231 and reaches the clamping groove 2321 of the connecting member 232, and then the threaded hole 2312 of the locking cap 231 and the threads 2322 of the connecting member 232 are engaged with each other, so that the connecting member 232 is clamped and fixed to the operating rod 22. In a third step, the slider 236 is engaged with the link 232 and the rails 2324 are respectively passed through the slide holes 2362 of the slider 236, whereupon the proximal port 2122 of the catch 212 is extended to the guide hole 2361 of the slider 236 and the catch 212 is secured in the guide hole 2361 so that the catch 212 can move with the slider 236. Fourthly, the internal thread 2331 of the rotating member 233 is matched with the external thread 2363 of the sliding block 236, and then the handheld portion 234 is matched with the connecting member 232, so that the guide rail 2324 is inserted into the slot 2341 of the handheld portion 234 and can be fixed in a tight fit or adhesive manner, and the rotating member 233 is axially limited between the handheld portion 234 and the end face 2325 of the connecting member 232.

It should be noted that the catcher 21 of the catching device 20 of the above embodiment is normally in a state of a larger loop diameter, and when the catcher 21 is hung on the recovery member 11, the rotating member 233 drives the sliding block 236 to move axially by the rotating member 233 of the adjusting handle 230, and the catching member 212 fixed on the sliding block 236 moves along with the sliding block 236, so that the loop diameter of the catcher 21 gradually decreases until the recovery member 11 is firmly caught, and the filter 10 is prevented from being separated from the catching loop 2123 during catching, thereby achieving better recovery.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A handle structure comprises an operating lever and a handle which are connected, and is characterized in that the handle comprises a locking cover, a connecting piece, a rotating piece, a handheld part and a sliding block; the operating rod respectively penetrates through the locking cover and the connecting piece, the locking cover is connected to the connecting piece and radially presses the connecting piece to enable the connecting piece to be tightly connected with the operating rod, the hand-held part is connected to the connecting piece, the connecting piece comprises a main body, the rotating piece is rotatably positioned between the main body and the hand-held part, the rotating piece drives the sliding block to move axially when rotating, the inner cavity of the operating lever is used for movably mounting the catching piece, the far end of the catching piece penetrates out of the inner cavity and is fixed at the far end of the operating rod, the near end of the catching piece penetrates out of the near end of the operating rod through the inner cavity and is fixedly connected with the sliding block, the slide block can drive the catching piece to move together, so that a catching ring with an adjustable inner diameter is formed at the far end of the catching piece.

2. The handle structure of claim 1, wherein the number of said connecting members includes at least two, at least two of said connecting members are circumferentially spaced apart, said operating lever extends between at least two of said connecting members, and said locking cap is disposed over said connecting members and radially compresses at least two of said connecting members.

3. The handle structure of claim 2, wherein the locking cap includes a through hole and a threaded hole that are in communication, the connecting member is provided with a clip groove and a thread that is engaged with the threaded hole, and the operating lever extends into the clip groove through the through hole.

4. The handle structure of claim 3, wherein a tapered surface is disposed in the locking cap, the tapered surface is adjacent to a side of the threaded hole opposite to the through hole, an inclined surface is disposed on the connecting member, an inclination angle of the tapered surface is smaller than an inclination angle of the inclined surface, and when the locking cap is fitted over the connecting member, the tapered surface radially presses the inclined surface, so that the operating lever is clamped and fixed between at least two of the connecting members.

5. The handle structure of claim 1, wherein the connector further comprises a guide rail connected to the main body, the slider is provided with a slide hole, and the guide rail passes through the slide hole and is fixedly connected with the hand-held portion.

6. The handle structure of claim 5, wherein the hand-held portion is provided with a slot, and the guide rail extends into the slot to be fixedly connected with the hand-held portion.

7. The handle structure of claim 1, wherein the rotating member is threaded over the slider.

8. A catching device, comprising a catching device and a handle structure as claimed in any one of claims 1 to 7, wherein the catching device comprises a catching member, an inner cavity penetrating along the axial direction is arranged in the operating rod, the catching member is movably arranged in the inner cavity, one end of the catching member penetrates out of the inner cavity and is fixed at the far end of the operating rod, the other end of the catching member penetrates out of the near end of the operating rod through the inner cavity and is fixedly connected with the sliding block, and the sliding block drives the catching member to move axially together, so that the catching member is formed into a catching ring with an adjustable inner diameter.

9. The capture device of claim 8, wherein the capture further comprises a spring tube that is sleeved outside the capture ring.

10. A filter system comprising a catch according to any one of claims 8 to 9.