Intracardiac valve replacement conveying device

Abstract

The utility model discloses an intracardiac valve replacement conveying device. The intracardiac valve replacement conveying device comprises a first catheter, a second catheter, a positioning assembly, a fourth catheter, a sleeve and a guide wire. The first guide pipe is of a hollow structure, and the second guide pipe is arranged in the first guide pipe and can slide in the extending direction of the first guide pipe; one end of the positioning assembly is connected with the second guide pipe, an annular groove is formed in the peripheral wall of the positioning assembly, and a first through hole penetrating through the two ends of the positioning assembly is formed in the positioning assembly; the fourth guide pipe is arranged in the first through hole and can slide in the length direction of the first through hole. The sleeve is located on the outer side of the fourth catheter, a containing cavity is formed between the sleeve and the fourth catheter, and the positioning assembly can be inserted into the containing cavity; the guide wire penetrates through the second catheter, and one end of the guide wire penetrates through the first through hole and is connected with the fourth catheter. The conveying device provided by the utility model has the advantages of simple structure and very simple operation mode, and is favorable for reducing the difficulty of an operation and improving the success rate of the operation.

Description

Technical Field

[0001] The utility model relates to the technical field of valve repair, in particular to an intracardiac valve replacement delivery device. Background Art

[0002] Mitral stenosis is a common and complex heart valve disease. The core problem lies in the adhesion at the junction of the mitral valve, which restricts the opening of the valve leaflets and reduces the valve area. This pathological process can have a serious impact on heart function and have a significant impact on the patient's quality of life. Although there are two commonly used treatments-transcatheter interventional repair and surgery, they both have certain limitations. The efficacy of transcatheter interventional repair is not stable and is prone to recurrence. Although surgery is the industry gold standard, it has a high risk of surgery and causes greater physical trauma to patients.

[0003] In recent years, transcatheter mitral valve replacement has become an emerging treatment for patients with mitral regurgitation, bringing new hope to these patients. However, this treatment method is not suitable for patients with mitral stenosis because their mitral valve anatomical lesions are significantly different from those of patients with regurgitation. The valve orifice area of ​​patients with mitral stenosis is smaller, and the current design of transcatheter mitral valve replacement devices is based on the regurgitant mitral valve. If it is implanted in the narrow mitral valve orifice, it will lead to insufficient valve orifice opening area. In addition, the internal movement space of patients with mitral stenosis is relatively small, and the need for alignment and stability is more important. The current supporting delivery system is difficult to use directly. Utility Model Content

[0004] The utility model provides an intracardiac valve replacement delivery device to solve the deficiencies of the prior art.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] An intracardiac valve replacement delivery device includes a first catheter, a second catheter, a positioning assembly, a fourth catheter, a sleeve and a guide wire. The first catheter is a hollow structure, the second catheter is arranged in the first catheter and can slide along the extension direction of the first catheter; one end of the positioning assembly is connected to the second catheter, an annular groove is arranged on the outer peripheral wall of the positioning assembly, and a first through hole is arranged on the positioning assembly that passes through both ends thereof; the fourth catheter is arranged in the first through hole and can slide along the length direction of the first through hole; the sleeve is located on the outside of the fourth catheter and has a receiving cavity between it and the fourth catheter, and the positioning assembly can be inserted into the receiving cavity; the guide wire is inserted into the second catheter, and one end of the guide wire passes through the first through hole and is connected to the fourth catheter.

[0007] The delivery device provided by the utility model is very suitable for in vivo delivery of a valve replacement device, and has the advantages of a simple structure and a very simple operation method, which is beneficial to reducing the difficulty of the operation and improving the success rate of the operation.

[0008] In some embodiments, the positioning assembly includes a third catheter, a first stopper and a second stopper, the first stopper and the second stopper are sleeved on the third catheter, there is a spacing between the first stopper and the second stopper to form an annular groove, and the first through hole is arranged on the third catheter.

[0009] The distance between the first stopper and the second stopper can be adjusted by toggling the first stopper so that the delivery device can be matched with valve replacement devices of different lengths.

[0010] In some embodiments, the second stopper includes a supporting portion and a stopping portion, the outer peripheral surface of the supporting portion is a cylindrical surface, and the diameter of the stopping portion is greater than the outer diameter of the supporting portion.

[0011] When the double-disc atrioventricular valve replacement device is embedded in the annular groove, the lower disc portion is sleeved on the outside of the support portion, the end of the lower disc portion contacts the stop portion, and the end of the rigid tube frame contacts the first stop block, thereby achieving stable installation of the double-disc atrioventricular valve replacement device.

[0012] In some embodiments, a plurality of protrusions are disposed on the outer peripheral wall of the support portion, and the plurality of protrusions are distributed at equal intervals along the outer peripheral wall of the support portion.

[0013] By making the protrusion cooperate with the double-disc atrioventricular valve replacement device, the double-disc atrioventricular valve replacement device can be firmly installed in the annular groove.

[0014] In some embodiments, the sleeve is a hollow round tube, and the inner diameter of the sleeve is not less than the outer diameter of the stopper.

[0015] The round tubular casing is easy to obtain materials and process, which helps to reduce manufacturing costs.

[0016] In some embodiments, one end of the first stopper adjacent to the second stopper is tapered, and the maximum diameter of the tapered portion is greater than the inner diameter of the sleeve.

[0017] After one end of the first stop adjacent to the second stop is designed to be tapered, a portion of the end can extend into the interior of the contracted double-disc valve replacement device, thereby supporting the end of the contracted double-disc valve replacement device and ensuring that the double-disc valve replacement device is stably fixed on the positioning assembly.

[0018] In some embodiments, the first conduit, the second conduit, the third conduit, and the fourth conduit are all hollow round tubes.

[0019] The circular tube-shaped conduit is easy to obtain materials and process, which helps to reduce manufacturing costs.

[0020] In some embodiments, the fourth catheter is connected to the sleeve through a plug body, the fourth catheter is provided with a second through hole, the plug body is provided with a third through hole, and the guide wire can pass through the first through hole, the second through hole, and the third through hole in sequence.

[0021] The guide wire passing through the second through hole and the third through hole plays a guiding role, enabling the fourth catheter and the sleeve to be accurately delivered to the target position, which is beneficial to improving the accuracy of installation.

[0022] In some embodiments, a plug body has an insert hole at one end adjacent to the second stopper, the insert hole is connected to the third through hole, and the fourth conduit is inserted into the insert hole and has an interference fit with the insert hole.

[0023] During assembly, the fourth conduit is inserted into the insertion hole to achieve connection between the fourth conduit and the plug body, so the connection operation between the fourth conduit and the plug body is very simple and quick.

[0024] In some embodiments, an end of the plug body adjacent to the second stopper has an insert portion, which surrounds the insertion hole and is interference fit with the sleeve.

[0025] This connection between the sleeve and the plug body makes the assembly process of the delivery device simpler.

[0026] In some embodiments, a retaining ring is further provided on the outer peripheral wall of the plug body, and the diameter of the retaining ring is larger than the outer diameter of the plug-in portion.

[0027] The provided retaining ring can control the insertion depth of the plug body to prevent the entire plug body from being inserted into the sleeve.

[0028] In some embodiments, the end of the plug body away from the second stopper has a tip portion, the stop ring is located between the tip portion and the plug-in portion, and the diameter of the tip portion gradually decreases from the end of the tip portion adjacent to the stop ring to the end of the tip portion away from the stop ring.

[0029] The provided tip portion is conducive to delivering the intracardiac valve replacement delivery device into the human body, further reducing the difficulty of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 It is a structural diagram of the conveying device provided by the utility model.

[0032] Figure 2 yes Figure 1sectional view of .

[0033] Figure 3 yes Figure 1 A magnified partial view of point A in the middle.

[0034] Figure 4 It is a cross-sectional view of the positioning assembly on the conveying device of the utility model when it is inserted into the sleeve.

[0035] Figure 5 It is a schematic diagram of the double-disc atrioventricular valve replacement device and the delivery device in the utility model when they are coordinated.

[0036] Figure 6 The utility model relates to a process in which the intracardiac valve replacement delivery device of the utility model delivers the double-disc-shaped atrioventricular valve replacement device to a target position.

[0037] Figure 7 It is a cross-sectional view of a plug body in the intracardiac valve replacement delivery device of the utility model.

[0038] The following are the descriptions of the reference numerals:

[0039] In the figure: 1, first catheter; 2, second catheter; 3, positioning assembly; 4, third catheter; 401, first through hole; 5, fourth catheter; 501, second through hole; 6, sleeve; 601, accommodating chamber; 7, guide wire; 8, first stopper; 9, second stopper; 901, supporting portion; 902, stopper; 903, protrusion; 10, plug body; 1001, third through hole; 1002, plug hole; 1003, plug-in portion; 1004, stop ring; 1005, tip portion; 11, ring groove; 100, valve replacement device; 200, intracardiac valve replacement delivery device. DETAILED DESCRIPTION

[0040] The following is a further detailed description of the implementation methods of the present application in conjunction with the accompanying drawings and examples. The detailed descriptions of the following examples and the accompanying drawings are used to exemplarily illustrate the principles of the present application, but cannot be used to limit the scope of the present application. The present application can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

[0041] The present application provides these embodiments to make the present application thorough and complete, and to fully express the scope of the present application to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, and not as limiting.

[0042] It should be noted that, in the description of this application, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0043] In addition, the words "first", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" does not mean vertical in the strict sense, but is within the tolerance range. "Parallel" does not mean parallel in the strict sense, but is within the tolerance range. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0044] It should also be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0045] All terms used in this application have the same meaning as those understood by those of ordinary skill in the art to which this application belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, such as general dictionaries, should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined herein.

[0046] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0047] See also Figures 1 to 7As shown, the utility model provides an intracardiac valve replacement delivery device 200, which includes a first catheter 1, a second catheter 2, a positioning assembly 3, a fourth catheter 5, a sleeve 6 and a guide wire 7. The first catheter 1 is a hollow structure, the second catheter 2 is arranged in the first catheter 1 and can slide along the extension direction of the first catheter 1; one end of the positioning assembly 3 is fixedly connected to the second catheter 2, and an annular groove 11 for accommodating the valve replacement device 100 is provided on the outer peripheral wall of the positioning assembly 3, and a first through hole 401 passing through both ends thereof is provided on the positioning assembly 3; the fourth catheter 5 is arranged in the first through hole 401 and can slide along the length direction of the first through hole 401; the sleeve 6 is located on the outside of the fourth catheter 5 and has a accommodating cavity 601 between it and the fourth catheter 5, the positioning assembly 3 can be inserted into the accommodating cavity 601, and the state of the positioning assembly 3 when inserted into the accommodating cavity 601 is shown in FIG. Figure 4 As shown; the guide wire 7 is inserted into the second catheter 2, and one end of the guide wire 7 passes through the first through hole 401 and is connected to the fourth catheter 5.

[0048] In the present invention, the first conduit 1, the second conduit 2 and the fourth conduit 5 are all round tubes. Figure 5 This is a schematic diagram of a valve replacement device 100 installed on the intracardiac valve replacement delivery device 200. The valve replacement device 100 is embedded in the annular groove 11. In this state, the sleeve 6 is pushed upward to install the positioning assembly 3 and the valve replacement device 100 into the accommodating cavity 601, thereby completing the storage of the valve replacement device 100.

[0049] The delivery device provided by the utility model is very suitable for in vivo delivery of the valve replacement device 100, and has the advantages of simple structure and simple operation, which is conducive to reducing the difficulty of surgery and improving the success rate of surgery.

[0050] In this embodiment, the positioning assembly 3 includes a third catheter 4, a first stopper 8 and a second stopper 9, the first stopper 8 and the second stopper 9 are sleeved on the third catheter 4, there is a distance between the first stopper 8 and the second stopper 9 to form an annular groove 11, and the first through hole 401 is provided on the third catheter 4. The distance between the first stopper 8 and the second stopper 9 is adapted to the length of the valve replacement device 100, and the distance between the first stopper 8 and the second stopper 9 can be adjusted by toggling the first stopper 8, so that the intracardiac valve replacement delivery device 200 matches valve replacement devices 100 of different lengths.

[0051] The first stopper 8 and the second stopper 9 are both rotating bodies, and the maximum diameters of the first stopper 8 and the second stopper 9 are larger than the inner diameter of the rigid straight tube frame 1 in the contracted state. The second stopper 9 includes a support portion 901 and a stopper 902, the outer peripheral surface of the support portion 901 is a cylindrical surface, the outer diameter of the support portion 901 is equal to the inner diameter of the valve replacement device 100 in the contracted state, and the diameter of the stopper 902 is larger than the outer diameter of the support portion 901.

[0052] In some embodiments, a plurality of protrusions 903 for cooperating with the valve replacement device 100 are provided on the outer peripheral surface of the support portion 901, and the plurality of protrusions 903 are equidistantly spaced along the outer peripheral wall of the support portion 901. When some valve replacement devices 100 are installed on the intracardiac valve replacement delivery device 200 of this embodiment, the contracted valve replacement device 100 is sleeved on the outer side of the support portion 901, and the protrusions 903 are inserted into the limiting holes of the valve replacement device 100. This connection method enables the valve replacement device 100 to be more firmly installed in the annular groove 11.

[0053] In some embodiments, the sleeve 6 is a hollow round tube. The round tube-shaped sleeve 6 is easy to obtain materials and process, which is conducive to reducing manufacturing costs. In order to allow the second stopper 9 to be accommodated in the accommodating cavity 601, the inner diameter of the sleeve 6 is not less than the outer diameter of the stopper 902. The end of the first stopper 8 adjacent to the second stopper 9 is tapered, and the maximum diameter of the tapered portion is greater than the inner diameter of the sleeve 6. After the end of the first stopper 8 adjacent to the second stopper 9 is designed to be tapered, a portion of the end can extend into the interior of the retracted valve replacement device 100, thereby supporting the end of the retracted valve replacement device 100 and ensuring that the valve replacement device 100 is stably fixed on the positioning assembly 3.

[0054] In some embodiments, the first conduit 1, the second conduit 2, the third conduit 4 and the fourth conduit 5 are all hollow round tubes. The round tube-shaped conduits are easy to obtain materials and process, which is beneficial to reducing manufacturing costs.

[0055] The fourth catheter 5 is connected to the sleeve 6 through the plug body 10. The fourth catheter 5 is provided with a second through hole 501. The plug body 10 is provided with a third through hole 1001. The guide wire 7 can pass through the first through hole 401, the second through hole 501, and the third through hole 1001 in sequence. The guide wire 7 passing through the second through hole 501 and the third through hole 1001 plays a guiding role, enabling the fourth catheter 5 and the sleeve 6 to be accurately transported to the target position, which is conducive to improving the accuracy of installation. Figure 6 As shown, during the process of releasing the valve replacement device 100, the fourth catheter 5 and the sleeve 6 can be driven downward by the guide wire 7, and when the sleeve 6 moves to be completely separated from the positioning component 3, the valve replacement device 100 can be completely released.

[0056] In order to facilitate the connection between the fourth conduit 5 and the plug body 10, a plug hole 1002 is provided at one end of the plug body 10 near the second stopper 9, and the plug hole 1002 is communicated with the third through hole 1001, and the fourth conduit 5 is inserted into the plug hole 1002 and has an interference fit with the plug hole 1002. During assembly, the fourth conduit 5 can be connected to the plug body 10 by inserting the fourth conduit 5 into the plug hole 1002, which is very convenient. In order to facilitate the connection between the sleeve 6 and the plug body 10, a plug part 1003 is provided at one end of the plug body 10 near the second stopper 9, and the plug part 1003 surrounds the plug hole 1002 and has an interference fit with the sleeve 6. A retaining ring 1004 is also provided on the outer peripheral wall of the plug body 10, and the diameter of the retaining ring 1004 is greater than the outer diameter of the retaining ring 1003. The retaining ring 1004 can control the insertion depth of the plug body 10 to prevent the entire plug body 10 from being inserted into the sleeve 6.

[0057] In some embodiments, the end of the plug body 10 away from the second stopper 9 has a tip portion 1005, the stop ring 1004 is located between the tip portion 1005 and the plug-in portion 1003, and the diameter of the tip portion 1005 gradually decreases from the end of the tip portion 1005 close to the stop ring 1004 to the end of the tip portion 1005 away from the stop ring 1004. Figure 7 As shown, the third through hole 1001 is located at one end of the tip portion 1005 away from the retaining ring 1004. The tip portion 1005 is provided to facilitate delivery of the intracardiac valve replacement delivery device into the human body, further reducing the difficulty of the operation.

[0058] The valve replacement device 100 is delivered to a target position in the human body via the intracardiac valve replacement delivery device 200, and then deployed or released by the intracardiac valve replacement delivery device 200. The installation method of the valve replacement device 100 and the intracardiac valve replacement delivery device 200 of the utility model is shown in FIG. Figure 5 As shown, Figure 5 The mid-valve replacement device 100 is not fully collapsed.

[0059] The process of the intracardiac valve replacement delivery device 200 delivering the valve replacement device 100 to the target position is shown in Figure 6 The valve replacement device 100 is connected to the intracardiac valve replacement delivery device 200, the valve replacement device 100 is positioned at a target location using the intracardiac valve replacement delivery device 200, and the valve replacement device 100 is completely detached from the intracardiac valve replacement delivery device 200 after evaluating the functionality of the valve replacement device 100.

[0060] During the operation, the intracardiac valve replacement delivery device 200 has the advantages of easy operation and smooth retraction and release. Moreover, the intracardiac valve replacement delivery device 200 can be recovered again after release, which is convenient for secondary adjustment of the placement position of the valve replacement device 100 in the body, so that the valve replacement device 100 can be placed in an ideal position and achieve a stronger fixation effect.

[0061] So far, various embodiments of the present application have been described in detail. In order to avoid obscuring the concept of the present application, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed herein.

[0062] Although some specific embodiments of the present application have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict.

Claims

1. An intracardiac valve replacement delivery device, characterized in that: include: A first conduit having a hollow structure; a second conduit disposed in the first conduit and slidable along an extension direction of the first conduit; A positioning component, one end of which is connected to the second conduit, an annular groove is provided on the outer peripheral wall of the positioning component, and a first through hole is provided on the positioning component that penetrates through both ends thereof; a fourth conduit, which is disposed in the first through hole and can slide along the length direction of the first through hole; a sleeve, the sleeve being located outside the fourth conduit and having an accommodating cavity between the sleeve and the fourth conduit, the positioning assembly being insertable into the accommodating cavity; A guide wire is inserted into the second catheter, and one end of the guide wire passes through the first through hole and is connected to the fourth catheter.

2. The intracardiac valve replacement delivery device according to claim 1, characterized in that: The positioning assembly includes a third conduit, a first stopper and a second stopper, wherein the first stopper and the second stopper are sleeved on the third conduit, a distance exists between the first stopper and the second stopper to form the annular groove, and the first through hole is arranged on the third conduit.

3. The intracardiac valve replacement delivery device according to claim 2, characterized in that: The second stopper includes a supporting portion and a stopping portion. The outer peripheral surface of the supporting portion is a cylindrical surface. The diameter of the stopping portion is greater than the outer diameter of the supporting portion.

4. The intracardiac valve replacement delivery device according to claim 3, characterized in that: A plurality of protrusions are arranged on the outer peripheral wall of the support portion, and the plurality of protrusions are distributed at equal intervals along the outer peripheral wall of the support portion.

5. The intracardiac valve replacement delivery device according to claim 4, characterized in that: The sleeve is a hollow round tube, and the inner diameter of the sleeve is not less than the outer diameter of the stopper.

6. The intracardiac valve replacement delivery device according to claim 5, characterized in that: One end of the first stopper adjacent to the second stopper is tapered, and the maximum diameter of the tapered portion is greater than the inner diameter of the sleeve.

7. The intracardiac valve replacement delivery device according to claim 6, characterized in that: The first conduit, the second conduit, the third conduit and the fourth conduit are all hollow round tubes.

8. The intracardiac valve replacement delivery device according to any one of claims 2 to 7, characterized in that: The fourth catheter is connected to the sleeve via a plug body, the fourth catheter is provided with a second through hole, the plug body is provided with a third through hole, and the guide wire can pass through the first through hole, the second through hole, and the third through hole in sequence.

9. The intracardiac valve replacement delivery device according to claim 8, characterized in that: An insertion hole is provided at one end of the plug body adjacent to the second stopper, the insertion hole is communicated with the third through hole, and the fourth conduit is inserted into the insertion hole and has an interference fit with the insertion hole.

10. The intracardiac valve replacement delivery device according to claim 9, characterized in that: The plug body has an inserting portion at one end adjacent to the second stopper, and the inserting portion surrounds the insertion hole and is interference-fitted with the sleeve.

11. The intracardiac valve replacement delivery device according to claim 10, characterized in that: A retaining ring is also provided on the outer peripheral wall of the plug body, and the diameter of the retaining ring is larger than the outer diameter of the plug-in portion.

12. The intracardiac valve replacement delivery device according to claim 11, characterized in that: The end of the plug body away from the second stopper has a tip portion, the stop ring is located between the tip portion and the plug-in portion, and the diameter of the tip portion gradually decreases from the end of the tip portion adjacent to the stop ring to the end of the tip portion away from the stop ring.

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