CN220833243U - Valve delivery is with transferring return bend subassembly and valve delivery device - Google Patents

Abstract

The utility model provides a prosthetic valve is carried with transferring return bend subassembly and prosthetic valve conveyor, prosthetic valve is carried with transferring return bend subassembly includes first pipe fitting, second pipe fitting and the third pipe fitting that overlaps in proper order. The first pipe fitting is a stainless steel pipe which is at least partially softened by a solid solution process, or the first pipe fitting is a metal pipe, and a plurality of cutting gaps are arranged along the axial direction at intervals. The second pipe fitting is a stainless steel pipe which is at least partially softened by a solid solution process, or the second pipe fitting is a metal pipe, and a plurality of cutting gaps are arranged along the axial direction at intervals. The third pipe fitting is a flexible bendable pipe fitting, when the third pipe fitting is bent, the third pipe fitting can drive the second pipe fitting to bend, and then the first pipe fitting is driven to bend, so that bending of the whole bending adjusting pipe assembly is realized. The first pipe fitting and the second pipe fitting are made of harder materials, and the pipe fittings have bending capability by utilizing a solid solution softening process or a cutting process, so that the pipe walls of the first pipe fitting and the second pipe fitting can be made as thin as possible while the tensile resistance and the extrusion resistance of the pipe fittings are ensured.

Description

Valve delivery is with transferring return bend subassembly and valve delivery device

Technical Field

The utility model relates to the technical field of medical appliances, in particular to an adjustable elbow assembly for artificial valve delivery and an artificial valve delivery device.

Background

Heart valve diseases, including mitral valve, tricuspid valve, aortic valve and pulmonary valve, are lesions, affecting the normal flow of blood flow, thus causing abnormal heart function, causing pain to the patient and even life-threatening. Currently, one of the treatments for valve regurgitation is transcatheter valve replacement. Transcatheter valve replacement is a novel minimally invasive treatment of valves by using a valve delivery system to deliver the valve to the native valve, replacing the effect of the native valve.

In the prior art, the flexible valve delivery system catheter is mostly a polymer woven tube. In clinical applications, these catheters have a problem in that the tubing costs are high and the cross-sectional profile of the delivery system is excessive.

Therefore, how to improve the technical defects existing in the prior art is a problem to be solved by the person skilled in the art.

Disclosure of utility model

The utility model aims to provide an adjusting and bending tube assembly for artificial valve conveying and an artificial valve conveying device, which can reduce the overall radial outline size of the adjusting and bending tube assembly and reduce the production cost.

The technical scheme provided by the utility model is as follows:

A prosthetic valve delivery trim tube assembly, comprising:

The first pipe fitting, the second pipe fitting and the third pipe fitting are sleeved in sequence from inside to outside;

The first pipe fitting is a stainless steel pipe which is at least partially softened by a solid solution process, or the first pipe fitting is a metal pipe, and a plurality of cutting gaps are axially arranged on the metal pipe at intervals; and

The second pipe fitting is a stainless steel pipe which is at least partially softened by a solid solution process, or the second pipe fitting is a metal pipe, and a plurality of cutting gaps are arranged on the metal pipe at intervals along the axial direction;

when the third pipe fitting is bent, the third pipe fitting drives the second pipe fitting to be bent, and then drives the first pipe fitting to be bent.

In some embodiments, the third pipe fitting comprises a pipe body and an elastic material layer coated on the surface of the pipe body, and the pipe body is a stainless steel braided pipe.

In some embodiments, the pipe wall of the pipe body is embedded with reinforcing ribs;

the reinforcing ribs are metal wires and extend along the axial direction of the pipe body.

In some embodiments, a distal end of the first tube extends out of the second tube, and the first tube is distally provided with a first capsule having a first chamber formed therein, a proximal end of the first chamber having an opening;

And

A second capsule is arranged at the distal end of the third pipe fitting, a second cavity is formed in the second capsule, and an opening is formed at the distal end of the second cavity;

the first pipe fitting and the third pipe fitting can move relative to the second pipe fitting, when the first capsule and the second capsule are connected and matched, the first chamber and the second chamber jointly form a placing station suitable for accommodating a prosthetic valve, and when the first capsule and the second capsule are separated, the prosthetic valve is released from the placing station.

In some embodiments, the distal end of the second tube extends beyond the third tube, and the second tube is provided with a claw disk for securing a prosthetic valve.

In some embodiments, the distal end of the first capsule is provided with a guide member, which is conically configured.

The present utility model also provides a prosthetic valve delivery device comprising:

a handle and a prosthetic valve delivery elbow assembly provided in any one of the above;

The proximal end of the first pipe fitting is movably fixed on the handle, and a first adjusting piece is arranged on the handle and used for controlling the first pipe fitting to move along the axis of the first pipe fitting; and

The proximal end of the third pipe fitting is movably fixed on the handle, and a second adjusting piece is arranged on the handle and used for controlling the third pipe fitting to move along the axis of the third pipe fitting;

The proximal end of the second tube is secured to the handle.

In some embodiments, the handle comprises a first split, a second split and a third split in sequence along the axial direction of the handle;

A first fixing piece is arranged in the first split body and can move relative to the first split body so as to fix the proximal end of the first pipe fitting;

A second fixing piece is arranged in the second split body and used for fixing the proximal end of the second pipe fitting;

And a third fixing piece is arranged in the third split body and can move relative to the third split body so as to fix the proximal end of the third pipe fitting.

In some embodiments, the first fastener outer sidewall is provided with external threads and the first split inner sidewall is provided with internal threads, the first split being rotatably secured to the proximal end of the second split;

The first split forms the first adjusting piece, and the first split rotates so as to drive the first fixing piece to move and further drive the first pipe fitting to move;

And

The outer side wall of the third fixing piece is provided with external threads, the inner side wall of the third split body is provided with internal threads, and the third split body is rotatably fixed at the far end of the second split body;

The third split forms the second adjusting piece, and the third split rotates to drive the third fixing piece to move and further drive the third pipe fitting to move.

In some embodiments, the handle further comprises a cover disposed at the proximal end of the first segment and the distal end of the third segment;

The cover body positioned at the proximal end of the first split body is provided with two connecting rods, and the distal ends of the two connecting rods are fixed at the proximal end of the second split body so as to clamp the first split body between the cover body and the second split body; the first fixing piece is slidably positioned between the two connecting rods, a gap is formed between the two connecting rods, and the edge of the first fixing piece penetrates through the gap to be in threaded fit with the first split side wall; and

The cover body positioned at the far end of the third split body is provided with two connecting rods, and the near ends of the two connecting rods are fixed at the far end of the second split body so as to clamp the third split body between the cover body and the second split body; the third fixing piece is slidably positioned between the two connecting rods, a gap is reserved between the two connecting rods, and the edge of the third fixing piece penetrates through the gap to be in threaded fit with the third split side wall.

The utility model has the technical effects that:

1. In this patent, the harder pipe fitting of material has all been selected to first pipe fitting and second pipe fitting to make the harder pipe fitting of material have flexible ability through solid solution softening technology or cutting technology, compare the polymer that commonly uses in prior art and weave tubular product, under the requirement of same tensile and anti extrusion strength, the pipe wall of first pipe fitting and second pipe fitting that this patent provided can make thinness. The pipe wall of the macromolecule woven pipe in the prior art is generally about 0.8mm, and the pipe walls of the first pipe fitting and the second pipe fitting of the valve can be 0.1-0.2mm, so that the size of the valve regulating and bending component in the radial direction for conveying the artificial valve is effectively reduced, the requirement of minimally invasive surgery is met, discomfort of a patient can be reduced to a certain extent, and the production cost is lower.

2. In this patent, the body of third pipe fitting is the stainless steel braided tube, compares in the polymer braided tube material that commonly uses among the prior art, and the tensile strength and the anti extrusion strength of stainless steel braided tube are also higher a bit, and the pipe wall also can be properly made thinly. On this basis, the pipe wall of body still has embedded the strengthening rib in this patent, and the strengthening rib is the wire, extends along body axial, can further reduce the body atress back in axial deformation volume, and the practicality is strong.

Drawings

The utility model is described in further detail below with reference to the attached drawings and detailed description:

FIG. 1 is a plan view of a prosthetic valve delivery device provided by the present utility model;

FIG. 2 is a cross-sectional view of a prosthetic valve delivery device provided by the present utility model;

FIG. 3 is a plan view of a second tube provided by the present utility model;

FIG. 4 is a cross-sectional view of a third tube provided by the present utility model;

FIG. 5 is an enlarged schematic view of the structure at A shown in FIG. 2;

Fig. 6 is a cross-sectional view of a handle provided by the present utility model.

Reference numerals illustrate:

100. A first pipe fitting; 110. a first capsule; 111. a first chamber; 120. a guide;

200. a second pipe fitting; 210. cutting the gap; 220. a claw disk;

300. A third pipe fitting; 310. a tube body; 311. reinforcing ribs; 320. an elastic material layer; 330. a second capsule; 331. a second chamber;

400. A handle; 410. a first split; 411. a first fixing member; 420. a second split; 421. a second fixing member; 430. a third split; 431. a third fixing member; 440. a cover body; 441. a connecting rod;

501. And (5) a placement station.

Detailed Description

In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present utility model. It will be apparent, however, to one skilled in the art that the present utility model may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present utility model with unnecessary detail.

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following description will explain the specific embodiments of the present utility model with reference to the accompanying drawings. It is evident that the drawings in the following description are only examples of the utility model, from which other drawings and other embodiments can be obtained by a person skilled in the art without inventive effort.

For simplicity of the drawing, only the parts relevant to the utility model are schematically shown in each drawing, and they do not represent the actual structure thereof as a product. Additionally, in order to simplify the drawing for ease of understanding, components having the same structure or function in some of the drawings are shown schematically with only one of them, or only one of them is labeled. Herein, "a" means not only "only this one" but also "more than one" case.

It should be further understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.

In this context, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, unless explicitly stated or limited otherwise; can be mechanically or electrically 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 utility model will be understood in specific cases by those of ordinary skill in the art.

In the embodiment shown in the drawings, indications of orientation (such as up, down, left, right, front and rear) are used to explain the structure and movement of the various components of the utility model are not absolute but relative. These descriptions are appropriate when the components are in the positions shown in the drawings. If the description of the location of these components changes, then the indication of these directions changes accordingly.

Herein, the "proximal end" refers to an end that is closer to the operator along the length of the prosthetic valve delivery device, and the "distal end" refers to an end that is farther from the operator along the length of the prosthetic valve delivery device.

In addition, in the description of the present utility model, the terms "first," "second," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.

According to an embodiment of the present utility model, referring to fig. 1 to 5, a valve delivery elbow assembly includes a first tube member 100, a second tube member 200, and a third tube member 300 sequentially sleeved from inside to outside. Wherein, the first pipe fitting 100 is a stainless steel pipe which is at least partially softened by a solid solution process, or the first pipe fitting 100 is a metal pipe, and a plurality of cutting gaps 210 are arranged along the axial direction of the metal pipe at intervals; in contrast, the second pipe member 200 is a stainless steel pipe at least partially softened by a solid solution process, or the second pipe member 200 is a metal pipe, and a plurality of cutting gaps 210 are axially spaced apart from the metal pipe.

When the third tube 300 is bent, the third tube 300 will drive the second tube 200 to bend, and then the second tube 200 will drive the first tube 100 to bend, thereby realizing the bending of the whole bending assembly for artificial valve delivery.

In this embodiment, the first pipe fitting 100 and the second pipe fitting 200 are made of harder materials, and the harder materials have a bendable capability through a solid solution softening process or a cutting process, and compared with the polymer woven pipe materials commonly used in the prior art, the pipe walls of the first pipe fitting 100 and the second pipe fitting 200 provided in this embodiment can be made thinner under the same requirements of tensile strength and extrusion strength.

Specifically, the polymer braided tube in the prior art is generally made of a composite of a plurality of layers of materials such as PTFE (Polytetrafluoroethylene), pebax (trade name of block polyether amide resin product thereof by ATOFINA company in france) and stainless steel wire braided and superimposed, so that the wall thickness is generally thick, and is about 0.8mm at most.

The tube walls of the first tube 100 and the second tube 200 provided in this embodiment can both be 0.1-0.2mm, which effectively reduces the radial size of the valve-adjusting and bending assembly for artificial valve delivery, meets the requirement of minimally invasive surgery, and can reduce the discomfort of patients to a certain extent, with high clinical value.

Moreover, no matter the solid solution softening pipe is adopted, or a plurality of cutting gaps 210 are formed by cutting at the positions of the pipe needing to be bent, the pipe has the capability of bending, the production technology is very mature, the production cost is lower than that of the high-polymer woven pipe, and the practicality is strong.

In actual production, when the first bendable pipe fitting 100 is formed by the solid solution softening process, the whole pipe in the heat treatment furnace can be softened by the solid solution process to form the first pipe fitting 100 as required; or selecting a pipe with a corresponding length according to the part of the first pipe fitting 100 to be bent, putting the pipe into a solid solution process softening heat treatment furnace for softening, and welding the pipe with an unsoftened stainless steel pipe after softening is completed to form the required first pipe fitting 100. Wherein the solid solution temperature adopted in the solid solution softening process is 1000 ℃, and the solid solution time is 1h.

If a cutting process is used to form the bendable first tube 100, laser cutting is performed where the first tube 100 needs to be bent. Among them, the first pipe fitting 100 is preferably made of stainless steel pipe, but is not treated by solution process, and has better tensile and extrusion resistance and low cost. It should be noted that the shape and the size of the laser gap formed after the laser cutting are not limited, and various cutting schemes can be adopted, so long as the flexibility of the cut first pipe fitting 100 is ensured, and the bending can be realized, which is not described herein, and the present utility model is within the scope of protection.

In contrast, in actual production, if the second pipe member 200 is formed to be bendable by a solution softening process, the entire pipe member in the heat treatment furnace can be softened by the solution softening process to form the second pipe member 200 as required; or selecting a pipe with a corresponding length according to the part of the second pipe fitting 200 needing to be bent, putting the pipe into a solid solution process softening heat treatment furnace for softening, and welding the pipe with an unsoftened stainless steel pipe after softening is completed to form the required second pipe fitting 200.

Generally, the distal end of the first tube 100 and the distal end of the third tube 300 for prosthetic valve delivery will be provided with a first capsule 110 and a second capsule 330 that can be mated together to receive and deliver a prosthetic valve. At this time, a part of the end of the second tube 200 may be left without softening, and the first capsule 110 and the second capsule 330 of the second tube 330 are softened from the corresponding positions, and the softening length is about 20 cm.

When the bendable second tube member 200 is formed by a cutting process, laser cutting is performed at a portion of the second tube member 200 to be bent, that is, cutting is started from a position corresponding to the second capsule 330 of the first capsule 110 and the second capsule 330 which are connected and matched, and the length of the cutting process is about 20 cm. The second pipe fitting 200 is preferably made of stainless steel pipe, but is not treated by solution process, and has better tensile strength and extrusion resistance and low cost. Likewise, the shape and size of the laser gap formed after the laser cutting are not limited, and various cutting schemes can be adopted, so long as the flexibility of the cut second pipe fitting 200 is ensured, the bending can be realized, and the description is omitted herein, and the shape and size of the laser gap are all within the protection scope of the present utility model.

In a preferred embodiment, referring to fig. 2, 3 and 5, the first tube member 100 is softened using a solid solution process to achieve a bendable function; the second tube member 200 is cut at a portion to be bent to form a plurality of cutting gaps 210, thereby realizing a bendable function. Meanwhile, the first pipe fitting 100 and the second pipe fitting 200 are made of stainless steel pipes, such as stainless steel 304, 316L, etc.

Specifically, referring to fig. 4, the third pipe 300 is a flexible and bendable pipe, and includes a pipe body 310 and an elastic material layer 320 coated on the surface of the pipe body 310, where the pipe body 310 is specifically a stainless steel braided pipe, and the elastic material layer 320 may be specifically a Pebax material layer.

In this embodiment, the body 310 of the third pipe fitting 300 is a stainless steel braided tube, and compared with the polymer braided tube commonly used in the prior art, the stainless steel braided tube has a higher tensile strength and an anti-extrusion strength, and the tube wall can be properly thinned, so that the radial dimension of the valve-adjusting and bending assembly for artificial valve delivery is further reduced.

Preferably, referring to fig. 4, the reinforcing ribs 311 are embedded in the wall of the pipe body 310, and the reinforcing ribs 311 are metal wires and extend along the axial direction of the pipe body 310, so that the deformation of the pipe body 310 in the axial direction after being stressed can be further reduced, and the pipe body 310 is prevented from being lengthened due to stress in the use process.

Specifically, referring to fig. 2 and 5, the distal end of the first tube 100 protrudes from the second tube 200, and the first tube 100 is provided with a first capsule 110 at the distal end, a first chamber 111 is formed in the first capsule 110, and the proximal end of the first chamber 111 has an opening. Meanwhile, a second capsule 330 is provided at the distal end of the third tube 300, and a second chamber 331 is formed in the second capsule 330, and the distal end of the second chamber 331 has an opening. At this time, both the first tube member 100 and the third tube member 300 are movable relative to the second tube member 200, and when the first capsule 110 and the second capsule 330 are coupled together, the first chamber 111 and the second chamber 331 together form a placement station 501 adapted to receive the prosthetic valve, and when the first capsule 110 and the second capsule 330 are separated, the prosthetic valve is released from the placement station 501. Of course, in preparation before operation, the first capsule 110 and the second capsule 330 may be separated, and then the prosthetic valve may be placed in the first chamber 111 or the second chamber 331, and the first capsule 110 and the second capsule 330 may be connected and matched again, so as to complete the loading of the prosthetic valve.

In particular, referring to fig. 2 and 5, the distal end of the second tube member 200 protrudes from the third tube member 300, and the second tube member 200 is provided with a claw disk 220 for securing the prosthetic valve loaded in the placement station 501.

Preferably, referring to fig. 2 and 5, the distal end of the first capsule 110 is provided with a guide 120, the guide 120 having a tapered configuration with a large end disposed toward the first capsule 110 and a small end disposed away from the first capsule 110 to guide the prosthetic valve delivery catheter assembly into the patient.

In practical production, the side wall of the guide 120 may be an inclined surface, an outer convex cambered surface, or an inner concave cambered surface, which is not limited herein, and can perform a guiding function, which is within the scope of the present utility model.

Referring to fig. 1 to 6, the present utility model further provides a prosthetic valve delivery device, including a handle 400 and a prosthetic valve delivery elbow assembly according to any of the above embodiments. The proximal end of the first tube 100 is movably fixed to the handle 400, and a first adjusting member is provided on the handle 400 for controlling the first tube 100 to move along its own axis. Meanwhile, the proximal end of the third tube 300 is movably fixed to the handle 400, and a second adjusting member is disposed on the handle 400 to control the third tube 300 to move along its own axis. While the proximal end of the second tube member 200 is fixed to the handle 400 and is not movable.

In this embodiment, the first tube 100 can be controlled to move distally by the first adjusting member, and the third tube 300 can be controlled to move proximally by the second adjusting member, so that the first capsule 110 and the second capsule 330 can move away from each other, thereby releasing the prosthetic valve. Similarly, the first tube 100 is controlled to move proximally by the first adjusting member, and the third tube 300 is controlled to move distally by the second adjusting member, so that the first and second capsules 110 and 330 move in directions approaching each other until the first and second capsules 110 and 330 are connected.

Specifically, referring to fig. 1, 2 and 6, the handle 400 includes a first split 410, a second split 420 and a third split 430 sequentially along its axial direction, and a first fixing member 411 is disposed in the first split 410, and the first fixing member 411 can move relatively to the first split 410 to fix the proximal end of the first tube 100. A second fixing member 421 is disposed in the second sub-body 420 for fixing the proximal end of the second tube member 200. The third split 430 has a third fixing member 431 disposed therein and movable relative to the third split 430 for fixing the proximal end of the third tube 300.

Preferably, referring to fig. 6, the outer sidewall of the first fixing member 411 is provided with external threads, and the inner sidewall of the first sub-body 410 is provided with internal threads, at this time, the first sub-body 410 is rotatably fixed to the proximal end of the second sub-body 420, forming the first adjusting member, and forming a displacement adjusting structure similar to a nut and a screw with the first sub-body 410. The medical staff can drive the first fixing piece 411 to axially move by rotating the first split 410, so as to drive the first pipe fitting 100 to axially move, and the operation is simple and convenient.

In contrast, the outer sidewall of the third fixing member 431 is provided with an external thread, and the inner sidewall of the third split body 430 is provided with an internal thread, at this time, the third split body 430 is rotatably fixed to the distal end of the second split body 420, so as to form the second adjusting member, and a displacement adjusting structure similar to a nut and a screw is formed with the third split body 430. The medical staff can drive the third fixing member 431 to axially move by rotating the third split 430, and further drive the third tube 300 to axially move.

In a specific embodiment, an axially extending slideway may be further disposed on the side wall of the first split 410, and a corresponding slider is disposed on the first fixing member 411, where the slider passes through the slideway and extends to the outside of the first split 410. At this time, the sliding block can drive the first fixing member 411 to move, so as to drive the first tube 100 to move axially. In contrast, a slide extending along the axial direction may be disposed on the side wall of the third split body 430, and the third fixing member 431 is provided with a corresponding slider, which passes through the slide and extends to the outside of the third split body 430. At this time, the sliding slider drives the third fixing member 431 to move, so as to drive the third tube 300 to move axially.

Specifically, referring to fig. 6, the handle 400 further includes a cover 440, and the number of the covers 440 is two, and the covers are respectively disposed at the proximal end of the first split 410 and the distal end of the third split 430.

The cover body 440 located at the proximal end of the first split body 410 extends towards the distal end to form two connecting rods 441, and the distal ends of the two connecting rods 441 are clamped to the proximal end of the second split body 420, so as to clamp the first split body 410 between the cover body 440 and the second split body 420. At this time, the first fixing member 411 is located between the two connection bars 441 and is movable in the axial direction of the connection bars 441. There is a gap between the two connecting rods 441 through which the edge of the first fixing member 411 is fitted with the side wall of the first split 410. If the inner side wall of the first split 410 is provided with an internal thread, then the outer side wall of the first fixing piece 411, which is matched with the inner side wall of the first split 410, is provided with an external thread, at this time, the first split 410 is rotated, and the first fixing piece 411 does not rotate along the axial direction of itself under the action of the two connecting rods 441, and only moves along the axial direction of itself, so that the practicability is strong. If the side wall of the first split 410 is provided with a slide extending along the axial direction, the sliding block on the first fixing piece 411 will first pass through the gap between the two connecting rods and then pass through the slide, so as to extend to the outer side of the first split 410.

In contrast, the cover 440 at the distal end of the third sub-body 430 is provided with two connection rods 441, and the proximal ends of the two connection rods 441 are fixed to the distal end of the second sub-body 420 to sandwich the third sub-body 430 between the cover 440 and the second sub-body 420. At this time, the third fixing member 431 is located between the two connection rods 441 and is movable in the axial direction of the connection rod 441. There is a gap between the two connection rods 441, through which the edge of the third fixing member 431 is engaged with the side wall of the third sub-body 430. If the inner side wall of the third split 430 is provided with an internal thread, then the outer side wall of the third fixing member 431 matched with the inner side wall of the third split 430 is provided with an external thread, at this time, the third split 430 is rotated, and the third fixing member 431 does not rotate along the axial direction of itself under the action of the two connecting rods 441, and only moves along the axial direction of itself, so that the practicability is strong. If the side wall of the third split 430 is provided with a slide extending along the axial direction, the sliding block on the third fixing member 431 first passes through the gap between the two connecting rods and then passes through the slide, so as to extend to the outer side of the third split 430.

In the foregoing embodiments, the descriptions of the embodiments are focused on, and the parts of a certain embodiment that are not described or depicted in detail may be referred to in the related descriptions of other embodiments.

It should be noted that the above embodiments can be freely combined as needed. The foregoing is merely a preferred embodiment of the present utility model and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present utility model, which are intended to be comprehended within the scope of the present utility model.

Claims (10)

1. An adjustable elbow assembly for prosthetic valve delivery, comprising:

The first pipe fitting, the second pipe fitting and the third pipe fitting are sleeved in sequence from inside to outside;

The first pipe fitting is a stainless steel pipe which is at least partially softened by a solid solution process, or the first pipe fitting is a metal pipe, and a plurality of cutting gaps are axially arranged on the metal pipe at intervals; and

The second pipe fitting is a stainless steel pipe which is at least partially softened by a solid solution process, or the second pipe fitting is a metal pipe, and a plurality of cutting gaps are arranged on the metal pipe at intervals along the axial direction;

when the third pipe fitting is bent, the third pipe fitting drives the second pipe fitting to be bent, and then drives the first pipe fitting to be bent.

2. The valve delivery trim assembly as defined in claim 1, wherein,

The third pipe fitting comprises a pipe body and an elastic material layer coated on the surface of the pipe body, and the pipe body is a stainless steel braided pipe.

3. The valve delivery trim assembly as defined in claim 2, wherein,

Reinforcing ribs are embedded in the pipe wall of the pipe body;

the reinforcing ribs are metal wires and extend along the axial direction of the pipe body.

4. The valve delivery elbow assembly according to any one of claim 1-3,

The distal end of the first pipe fitting extends out of the second pipe fitting, a first capsule is arranged at the distal end of the first pipe fitting, a first cavity is formed in the first capsule, and an opening is formed at the proximal end of the first cavity; and

A second capsule is arranged at the distal end of the third pipe fitting, a second cavity is formed in the second capsule, and an opening is formed at the distal end of the second cavity;

the first pipe fitting and the third pipe fitting can move relative to the second pipe fitting, when the first capsule and the second capsule are connected and matched, the first chamber and the second chamber jointly form a placing station suitable for accommodating a prosthetic valve, and when the first capsule and the second capsule are separated, the prosthetic valve is released from the placing station.

5. The valve delivery trim assembly as defined in claim 4, wherein,

The distal end of the second tube extends out of the third tube, and the second tube is provided with a claw disc for fixing the artificial valve.

6. The valve delivery trim assembly as defined in claim 4, wherein,

The distal end of the first capsule is provided with a guide member, which is of conical configuration.

7. A prosthetic valve delivery device, comprising:

a handle and valve delivery elbow assembly of any one of claims 1-6;

The proximal end of the first pipe fitting is movably fixed on the handle, and a first adjusting piece is arranged on the handle and used for controlling the first pipe fitting to move along the axis of the first pipe fitting; and

The proximal end of the third pipe fitting is movably fixed on the handle, and a second adjusting piece is arranged on the handle and used for controlling the third pipe fitting to move along the axis of the third pipe fitting;

The proximal end of the second tube is secured to the handle.

8. The prosthetic valve delivery device of claim 7,

The handle comprises a first split body, a second split body and a third split body in sequence along the axial direction of the handle;

A first fixing piece is arranged in the first split body and can move relative to the first split body so as to fix the proximal end of the first pipe fitting;

A second fixing piece is arranged in the second split body and used for fixing the proximal end of the second pipe fitting;

And a third fixing piece is arranged in the third split body and can move relative to the third split body so as to fix the proximal end of the third pipe fitting.

9. The prosthetic valve delivery device of claim 8,

The outer side wall of the first fixing piece is provided with external threads, the inner side wall of the first split body is provided with internal threads, and the first split body is rotatably fixed at the proximal end of the second split body;

The first split forms the first adjusting piece, and the first split rotates so as to drive the first fixing piece to move and further drive the first pipe fitting to move;

And

The outer side wall of the third fixing piece is provided with external threads, the inner side wall of the third split body is provided with internal threads, and the third split body is rotatably fixed at the far end of the second split body;

The third split forms the second adjusting piece, and the third split rotates to drive the third fixing piece to move and further drive the third pipe fitting to move.

10. The prosthetic valve delivery device of claim 9,

The handle also comprises a cover body which is arranged at the proximal end of the first split body and the distal end of the third split body;

The cover body positioned at the proximal end of the first split body is provided with two connecting rods, and the distal ends of the two connecting rods are fixed at the proximal end of the second split body so as to clamp the first split body between the cover body and the second split body; the first fixing piece is slidably positioned between the two connecting rods, a gap is formed between the two connecting rods, and the edge of the first fixing piece penetrates through the gap to be in threaded fit with the first split side wall; and

The cover body positioned at the far end of the third split body is provided with two connecting rods, and the near ends of the two connecting rods are fixed at the far end of the second split body so as to clamp the third split body between the cover body and the second split body; the third fixing piece is slidably positioned between the two connecting rods, a gap is reserved between the two connecting rods, and the edge of the third fixing piece penetrates through the gap to be in threaded fit with the third split side wall.