CN219941533U

CN219941533U - Catheter for transcatheter delivery system

Info

Publication number: CN219941533U
Application number: CN202320690800.5U
Authority: CN
Inventors: 蔡睿; 巨达; 冯彬; 贺志秀; 吴明明; 陈大凯
Original assignee: Koka Nantong Lifesciences Co Ltd
Current assignee: Koka Nantong Lifesciences Co Ltd
Priority date: 2023-03-08
Filing date: 2023-03-31
Publication date: 2023-11-03
Anticipated expiration: 2033-03-31
Also published as: CN118615064A; CN118615063A; CN219782849U; CN219782846U; CN118615062A; CN219782847U; CN219782848U

Abstract

The utility model discloses a catheter for a transcatheter delivery system, which relates to the technical field of medical appliances and comprises the following components: the catheter comprises a hanging lug cladding pipe and an inner pipe, wherein the inner pipe is arranged in the hanging lug cladding pipe; compared with the traditional method that the inner tube and the hanger cladding tube are emptied by independently filling normal saline and the like, the utility model combines the air evacuation of the inner tube and the hanger cladding tube into a whole through the arrangement of the penetration holes, and can realize the air evacuation of the inner tube and the hanger cladding tube without a plurality of externally connected channels, thereby effectively simplifying the operation of evacuating air of the guide tube.

Description

Catheter for transcatheter delivery system

Technical Field

The utility model relates to the technical field of medical appliances, in particular to a catheter for a transcatheter delivery system.

Background

The heart is divided into left and right parts, each part comprising a ventricle and an atrium, the ventricle and the atrium are separated by a ventricular septum and a atrial septum, valves for preventing blood reflux are arranged between the atrium and the ventricle, and the normal valves only allow blood to flow in one direction in the heart.

Wherein mitral regurgitation is due to valve insufficiency, and when the left ventricle contracts, blood flow is injected into the aorta and the left atrium with smaller resistance from the left ventricle, and at this time, the left atrium receives blood regurgitated from the left ventricle in addition to blood returned from the pulmonary veins, so that the pressure of the left atrium rises to cause the pressure of the pulmonary veins and pulmonary capillaries to rise, and then dilate and congestion occurs; at the same time, the capacity load of the left ventricle in diastole increases, and the left ventricle expands. When the acute mitral valve is not closed fully, a sudden increase in the left atrium with a large amount of regurgitated blood can cause a sudden rise in left atrium and pulmonary vein pressure, causing acute pulmonary edema.

Tricuspid regurgitation is generally caused by pulmonary hypertension, right ventricular enlargement and tricuspid valve ring expansion, and symptoms such as hypodynamia, ascites, edema, liver pain, dyspepsia and anorexia can be caused after tricuspid valve regurgitation, so that symptoms of right heart failure are aggravated, and even death is directly caused.

Since the transcatheter operation has the advantages of small trauma, quick recovery and the like, more and more operations begin to be performed by adopting the transcatheter operation, most of the valve replacement of the valve of the two/tricuspid valve is changed from the early surgical operation mode to the transcatheter operation mode, so that the valve replacement operation of the two/tricuspid valve is rapidly developed, the operation of the operating handle for conveying the catheter is particularly important in the operation, because the implantation process of the valve replacement of the two/tricuspid valve needs to be controlled by the handle, the conventional handle generally needs to be independently emptied, namely air is discharged, in the operation, each catheter is connected by an emptying pipeline, the movement of the handle is limited, and the structure is complex.

Disclosure of Invention

Aiming at the problems that in the prior art, each part of a catheter needs to be emptied of air and the structure is complex, the utility model provides the catheter for a catheter conveying system, thereby solving the problem that the air in each part of the catheter of the handle is inconvenient to empty.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

a catheter for a transcatheter delivery system, comprising:

the catheter comprises a hanging lug cladding pipe and an inner pipe, wherein the inner pipe is arranged in the hanging lug cladding pipe;

the inner tube is provided with penetration holes at the inner part of the hanger cladding tube.

Preferably, the proximal end of the catheter is mounted on the mounting plate, a metal pipe sleeve is arranged on the periphery of a part of the inner pipe positioned in the mounting plate, penetration holes are formed in the inner pipe positioned in the mounting plate and the part of the metal pipe sleeve on the periphery of the inner pipe positioned in the hanger cladding pipe, and the penetration holes are communicated with the inner part of the inner pipe and the outer part of the inner pipe.

Preferably, the proximal end of the inner tube is fixedly connected with the assembly disc through a luer connector.

Preferably, the outer side of the hanger cladding pipe is provided with a regulating bent pipe, the proximal end of the regulating bent pipe is provided with a penetration hole, the penetration hole is communicated with the inside of the regulating bent pipe and the outside of the regulating bent pipe, and the outer side of the regulating bent pipe is provided with an outer pipe.

Preferably, the outer tube is axially movable, and when the outer tube is positioned at the proximal end, the penetration holes of the tuning tube are all positioned inside the outer tube.

Preferably, the near end of the bent pipe is communicated with the outside through a bent pipe fixing seat, an external connecting channel is arranged on the side surface of the bent pipe fixing seat, and the external connecting channel penetrates through the inside and the outside of the bent pipe fixing seat.

Preferably, the inner portion of the bent pipe adjusting fixing seat penetrates through the hanger cladding pipe, and a sealing ring is arranged between the bent pipe adjusting fixing seat and the hanger cladding pipe.

Preferably, the sealing ring is arranged in a sealing ring hole, the sealing ring hole is a rectangular duct with at least one end penetrating through the side face of the bent pipe fixing seat, the radial width of the sealing ring hole is larger than the diameter of the inner channel at the two axial sides of the sealing ring hole, the sealing ring is arranged in the sealing ring hole, and the sealing ring is sleeved outside the hanger cladding pipe.

Preferably, the proximal end of the hanger cladding tube is fixedly connected to the hanger cladding tube fixing seat, and the hanger cladding tube fixing seat is provided with a sealing ring hole for installing a sealing ring.

Preferably, the distal end of the inner tube is provided with an ear hanger, the ear hanger is connected with the distal end of the inner tube, and the outer surface of the ear hanger is provided with a groove or a convex column.

Preferably, the inner tube is inserted into the hanger, the near end and the far end of the groove are respectively provided with a glue injection hole, the glue injection holes radially penetrate through the hanger, the included angle between the axes of the glue injection holes at the near end and the far end of the groove is not less than 60 degrees, and the glue injection holes at the far end are mutually axially staggered with the groove.

Preferably, the diameter of the distal portion of the catheter is greater than the diameter of the proximal portion of the catheter.

Compared with the prior art, the utility model provides a catheter for a transcatheter delivery system. The beneficial effects are as follows:

1. compared with the traditional method that the air is emptied by independently feeding normal saline and the like into the inner tube and the hanging lug cladding tube, the utility model combines the air evacuation of the inner tube and the hanging lug cladding tube into a whole through the arrangement of the penetrating holes, and can realize the air evacuation of the inner tube and the hanging lug cladding tube without a plurality of externally connected channels, thereby effectively simplifying the operation of evacuating air of the guide tube and reducing the influence on a handle movement mechanism.

2. Compared with the traditional pipe bending and handle discharging which requires separate conveying channels, the pipe bending and handle discharging device is characterized in that the pipe bending and handle discharging device is integrated with the pipe bending and handle discharging which is provided with penetrating holes at the near end of the pipe bending and tube discharging paths of the pipe bending and tube discharging which are integrated effectively, the structure is simplified, the normal discharging function is not affected, the complexity of the device is effectively reduced, and the air discharging treatment of the pipe bending and tube discharging device can be realized only by one external communication channel.

3. The diameter of the distal end part of the catheter is larger than that of the proximal end part of the catheter, when the artificial heart valve is delivered through the strand, the distal end of the catheter needs to be wrapped with the valve, so that the outer contour diameter of the distal end part is larger, in the delivery process, when the wrapped valve part passes through a thinner blood vessel, the blood vessel is expanded, the continuous blood vessel expansion can cause damage to the blood vessel, so that the unwrapped valve part of the catheter, namely the proximal end part of the catheter, is smaller than that of the distal end part of the catheter, and when the distal end of the catheter passes through the blood vessel, the thinner proximal end part of the catheter can not continuously expand the blood vessel or reduce the expansion of the blood vessel, thereby effectively reducing the influence of the catheter on the blood vessel.

Drawings

The specific features of the utility model related to the utility model are shown in the appended claims. A better understanding of the features and advantages of the utility model in accordance with the present utility model will be obtained by reference to the exemplary embodiments and the accompanying drawings that are described in detail below. The drawings are briefly described as follows:

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic illustration of the structure of the utility model with the housing removed;

FIG. 3 is a schematic structural view of a bent pipe adjusting and fixing seat of the present utility model

FIG. 4 is a schematic view of the structure of the outer tube, the adjusting bend, the hanger cladding tube, the inner tube and the fixing seat thereof;

FIG. 5 is an exploded view of FIG. 4 in accordance with the present utility model;

FIG. 6 is an exploded view of the removable mounting plate of FIG. 4 in accordance with the present utility model;

FIG. 7 is a schematic structural view of an outer tube, an elbow, a hanger cladding tube, and an inner tube;

FIG. 8 is a schematic view of a fixing base of an adjusting elbow according to the present utility model;

FIG. 9 is a cross-sectional view of the tuning trap holder of the present utility model;

FIG. 10 is a schematic view of a holder for a hanger cladding tube according to the present utility model;

FIG. 11 is a cross-sectional view of a holder for a hanger cladding tube in accordance with the present utility model;

FIG. 12 is a schematic view of the structure of the outer tube fixing base of the present utility model;

FIG. 13 is a cross-sectional view of an outer tube holder of the present utility model;

fig. 14 is a schematic structural view of the ear hanger of the present utility model.

Reference numerals illustrate:

1000. proximal, 2000, distal, 1, outer shell, 101, upper shell, 102, lower shell, 2, assembly disc, 3, hanger cladding tube, 4, hanger cladding tube fixing base, 5, tuning tube, 6, tuning tube fixing base, 601, external connection channel, 7, inner tube, 701, hanger, 70101, groove, 70102, boss, 70103, glue injection hole, 8, outer tube, 9, outer tube fixing base, 10, permeation hole, 11, sealing ring hole, 12, catheter, 13, luer connector.

Detailed Description

Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict.

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

It should be noted that, in this context, for example, a is fixedly connected to B, and a and B may be directly fixedly connected to each other or indirectly fixedly connected to each other through C.

It should be noted that, except as specifically described herein, the "proximal" refers to the side of the electrokinetic delivery system closer to the operator, as shown in fig. 1, the reference numeral proximal 1000, and the "distal" refers to the side of the electrokinetic delivery system further from the operator, as shown in fig. 1, the reference numeral distal 2000.

The utility model provides a technical scheme that: a catheter for a transcatheter delivery system, comprising a catheter 12;

the catheter 12 includes:

hanger cladding tube 3: the inner tube 7 is arranged in the hanger cladding tube 3 and is used for being matched with the inner tube 7 to fix the artificial heart valve, controlling the connection and separation of the valve and the catheter 12;

inner tube 7: the distal end of the hanging ring cladding tube 3 is matched with the hanging ring cladding tube 3 and is used for fixing the connection between the artificial heart valve and the catheter 12;

when the catheter 12 enters a human body, the air in the catheter 12 needs to be exhausted, and in order to improve the exhausting efficiency of the catheter 12, the inner tube 7 is provided with the penetrating holes 10 in the inner part of the hanger cladding tube 3, so that the inner tube 7 and the hanger cladding tube 3 can be simultaneously exhausted.

In some embodiments, since the catheter 12 is bendable, the proximal end of the catheter 12 is mounted on the mounting plate 2 (where the outer side of the mounting plate 2 may be provided with the housing 1, the housing 1 is used to form the outer surface of the operation handle, the mounting plate 2 is mainly used to load each component, the mounting plate 2 is fixedly mounted inside the housing 1, where the mounting plate 2 may be integrally formed with the housing 1, or the mounting plate 2 may not be integrally formed with the housing 1, and by assembling the housing 1 and the mounting plate 2 later, an embodiment is given where the housing 1 includes the upper housing 101 and the lower housing 102, and the mounting plate 2 may be integrally formed with the lower housing 102, the upper housing 101 and the lower housing 102 may form a complete outer surface of the handle, and an embodiment is given where the housing 1 includes the upper housing 101 and the lower housing 102, and the mounting plate 2 is mounted on the lower housing 102, and the upper housing 101 and the lower housing 102 may form a complete outer surface of the handle; the shell 1 can be cuboid, cylinder, ellipsoid and other shapes, also can be by a plurality of parts constitution), in order to guarantee that pipe 12 keeps straight in the handle inside, select to be provided with the metal pipe box in inner pipe 7 is located the interior partial periphery of assembly dish 2, the metal pipe box can be stainless steel, nickel titanium alloy or cobalt chromium alloy and other materials, because inner pipe 7 runs through the proximal end of handle to distal end, can realize that pipe 12 keeps straight in the part in the handle, the inside inner pipe 7 of assembly main part and the metal pipe box of its periphery are provided with the infiltration hole in the inside part of hangers cladding pipe 3, infiltration hole UNICOM inner pipe 7 is inside with the inner pipe 7 outside to can also carry out the air evacuation to hangers cladding pipe 3 through to inner pipe 7 evacuation air.

In some embodiments, to facilitate connection of the proximal end of the inner tube 7 to an external device (e.g., an air evacuation device), the proximal end of the inner tube 7 is fixedly connected to the mounting plate 2 via a luer fitting 13.

In some embodiments, the outer side of the hanger cladding pipe 3 is provided with a regulating pipe bend 5, the proximal end of the regulating pipe bend 5 is provided with a penetration hole 10, the penetration hole 10 communicates with the inside of the regulating pipe bend 5 and the outside of the regulating pipe bend 5, and the outer side of the regulating pipe bend 5 is provided with an outer pipe 8, where the outer pipe 8: for forming the outermost layer of the catheter 12, while the distal end of the outer tube 8 is used for wrapping the valve, preventing the valve from expanding or scratching the blood vessel during delivery, etc., the proximal end of the outer tube 8 may be connected to the outer tube holder 9;

in some embodiments, since the outer tube 8 is movable, the outer tube 8 may be axially movable, but when the outer tube 8 is located at the proximal end, the permeation hole 10 of the elbow 5 is located entirely inside the outer tube 8, and of course further, when the pore diameter of the permeation hole 10 is too large to prevent liquid from leaking out through the permeation hole 10, and when the outer tube 8 is located at the distal end, the permeation hole 10 of the elbow 5 is also located entirely inside the outer tube 8, but too long a distance from the permeation hole 10 to the proximal end of the elbow 5 may cause an increase in the liquid pressure required for evacuation.

In some embodiments, the proximal end of the elbow 5 is communicated with the outside through an elbow fixing seat 6, an external connection channel 601 is arranged on the side surface of the elbow fixing seat 6, the external connection channel 601 penetrates through the inside and the outside of the elbow fixing seat 6, and all air evacuation of the inside of the elbow 5 and the gap between the outer tube 8 and the elbow 5 can be realized only by one external connection channel 601.

In some embodiments, since the hanger cladding pipe 3 is disposed inside the elbow pipe 5, and the hanger cladding pipe 3 penetrates through the elbow pipe fixing seat 6, a sealing ring is disposed between the elbow pipe fixing seat 6 and the hanger cladding pipe 3 when the hanger cladding pipe 3 penetrates inside the elbow pipe fixing seat 6.

In some embodiments, in order to install the sealing ring more conveniently, the sealing ring is shown to be disposed in the sealing ring hole 11, the sealing ring hole 11 is a rectangular hole with at least one end penetrating through the side surface of the bent pipe fixing seat 6, as shown in fig. 10 and 11, the radial width of the sealing ring hole 11 (i.e. the rectangular hole) is larger than the diameter of the inner channels of the two axial sides (i.e. the distal side and the proximal side) of the sealing ring hole, so that the sealing ring cannot axially displace after being embedded into the sealing ring hole 11, and the sealing ring is sleeved on the conduit 12, where the sealing ring can be sleeved on the outer side of the hanger cladding pipe 3, so that the sealing ring cannot radially move, therefore, the sealing ring can be installed conveniently and rapidly compared with the conventional large-diameter stepped hole through the design of the sealing ring hole 11, the sealing ring is disposed in the sealing ring hole 11, the sealing ring is sleeved on the outer side of the conduit 12, and it is required to be stated that the sealing ring hole 11 can be disposed at each layer of the conduit 12, so as to ensure the tightness between the conduits 12, for example, the fixing seat 9 is also provided with the sealing ring hole 11.

Further, the proximal end of the hanger cladding tube 3 is fixedly connected to the hanger cladding tube fixing seat 4, and the hanger cladding tube fixing seat 4 is provided with a sealing ring hole 11 for installing a sealing ring.

In some embodiments, a structure of an ear hanger 701 is provided for fixing a prosthetic heart valve by matching with the ear wrapping tube 3 at the distal end of the inner tube 7, the distal end of the inner tube 7 is provided with the ear hanger 701, the ear hanger 701 is connected with the distal end of the inner tube 7, the outer surface of the ear hanger 701 is provided with a groove or a convex pillar, and likewise, the prosthetic heart valve is provided with a corresponding ear hanger, and the ear hanger is used for connection with the ear hanger 701. In more detail, as shown in fig. 14, there is provided an ear hanger 701 connected to a prosthetic heart valve, where a corresponding ear is provided on the prosthetic heart valve, the ear hanger is engaged in a groove 70101 of the ear hanger 701 and is wrapped and limited in the groove 70101 by an ear wrapping tube 3, when the ear hanger tube 3 moves proximally, the ear hanger of the valve loses its binding and pops out from the groove 70101, thereby separating the valve from the catheter 12, a distal end of the inner tube 7 is provided with the ear hanger 701, the ear hanger 701 is connected to a distal end of the inner tube 7, an outer surface of the ear hanger 701 is provided with a groove 70101, in some examples, an outer surface of the ear hanger 701 is provided with a boss 70102, for example, a square boss, etc., and a corresponding round hole or square hole is provided on the ear hanger 70102 for being sleeved on an outer surface of the ear hanger 701, and in some embodiments, the outer surface of the ear hanger 701 is provided with a groove 70101, and the corresponding ear hanger 70102 is also provided with a corresponding hole or square hole on the ear hanger 70101.

In some embodiments, an ear hanger 701 fixed by using an adhesive manner is improved, the inner tube 7 is inserted into the ear hanger 701, the proximal end and the distal end of the groove 70101 are respectively provided with a glue injection hole 70103, the glue injection holes 70103 radially penetrate through the ear hanger 701, the included angle between the axes of the glue injection holes 70103 at the proximal end and the distal end of the groove 70101 is not less than 60 degrees, the whole circumference of the inner tube 7 is effectively ensured to be adhesive, and the glue injection holes 70103 at the distal end are axially staggered with the groove 70101, so that the glue injection holes 70103 are prevented from overflowing the adhesive to affect the groove 70101.

In some embodiments, the distal portion of the catheter 12 (outer tube 8) has a larger diameter than the proximal portion of the catheter 12 (outer tube 8), and the distal portion of the catheter 12 (outer tube 8) is required to be wrapped around the valve during transfemoral delivery of the prosthetic heart valve, so that the outer diameter of the distal portion is larger, and during delivery, the wrapped valve portion may expand the vessel, and the sustained expansion of the vessel may cause damage to the vessel, so that the unwrapped valve portion of the catheter 12, i.e., the proximal portion of the catheter 12, is smaller in diameter than the distal portion, effectively reducing the effect of the catheter 12 on the vessel, and the thinner proximal portion of the catheter may no longer continuously expand the vessel or reduce the expansion of the vessel after the distal portion of the catheter 12 has been passed, effectively reducing the effect of the catheter 12 on the vessel.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A catheter for a transcatheter delivery system, comprising a catheter, characterized in that:

2. The catheter for transcatheter delivery system according to claim 1, wherein the proximal end of the catheter is mounted to a fitting tray, a metal tube sleeve is provided around a portion of the inner tube located inside the fitting tray, and penetration holes are provided in the inner tube of the fitting tray and a portion of the metal tube sleeve around the inner tube located inside the hanger cladding tube, the penetration holes communicating the inner tube with the outer portion of the inner tube.

3. The transcatheter delivery system catheter of claim 2, wherein the proximal end of the inner tube is fixedly attached to the mounting disk by a luer fitting.

4. The catheter for transcatheter delivery system according to claim 1 or 2, wherein the hanger cladding tube is provided with a regulating tube on the outside thereof, a proximal end of the regulating tube is provided with a penetration hole, the penetration hole communicates the inside of the regulating tube with the outside thereof, and an outer tube is provided on the outside thereof.

5. The transcatheter delivery system catheter of claim 4, wherein the outer tube is axially movable, and wherein the permeate aperture of the tuning tube is entirely within the outer tube when the outer tube is proximal.

6. The catheter for transcatheter delivery system of claim 4, wherein the proximal end of the elbow is in communication with the exterior through an elbow mount, wherein an external communication channel is provided on a side of the elbow mount, the external communication channel extending through the interior and exterior of the elbow mount.

7. The catheter for transcatheter delivery system of claim 6, wherein the inner portion of the bend-adjusting tube holder is penetrated by a hanger cladding tube, and a sealing ring is disposed between the bend-adjusting tube holder and the hanger cladding tube.

8. The catheter for transcatheter delivery system of claim 7, wherein the sealing ring is disposed in a sealing ring hole, the sealing ring hole is a rectangular hole having at least one end penetrating through the side surface of the fixed seat of the bent pipe, the radial width of the sealing ring hole is larger than the diameter of the inner channels on both axial sides thereof, the sealing ring is disposed in the sealing ring hole, and the sealing ring is sleeved outside the hanger cladding pipe.

9. The catheter for transcatheter delivery system of claim 1, wherein the proximal end of the hanger cladding tube is fixedly attached to a hanger cladding tube holder, the hanger cladding tube holder being provided with a sealing ring aperture for mounting a sealing ring.

10. The transcatheter delivery system catheter of claim 1, wherein the distal end of the inner tube is provided with a hanger, the hanger being connected to the distal end of the inner tube, the outer surface of the hanger being provided with a groove or a projection.

11. The catheter for transcatheter delivery system of claim 10, wherein the inner tube is inserted into the interior of the hanger, wherein the proximal and distal ends of the groove are each provided with an injection hole, wherein the injection holes extend radially through the hanger, wherein the angle between the axes of the injection holes at the proximal and distal ends of the groove is not less than 60 degrees, and wherein the injection holes at the distal end are axially offset from the groove.

12. The transcatheter conduit transfer system of claim 1, wherein the distal portion of the conduit has a diameter greater than a diameter of the proximal portion of the conduit.