Implant loading tools and medical devices

Abstract

The present invention provides a loading tool and a medical device for an implant, wherein the loading tool for the implant comprises a guide cover and a guide seat for detachably connecting with the guide cover; the guide seat is used to penetrate the guide cover along a first direction to perform a first compression on the implant; the guide seat is also used to detachably connect with the guide cover along a second direction opposite to the first direction to perform a second compression on the implant; wherein, when the guide seat is connected with the guide cover along the second direction, the guide seat and the guide cover are coaxial, and the guide seat is restricted in radial displacement and axial displacement relative to the guide cover. With such a configuration, the guide seat is cleverly used to compress the implant twice, both forward and reverse, simplifying the structure of the loading tool, and achieving the coaxiality of the guide seat and the guide cover during the second compression process, reducing the difficulty of the operator's operation, and making the entire crimping process more convenient and efficient.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, and in particular to a loading tool and a medical device for an implant. Background Art

[0002] Interventional aortic valve implantation is a new minimally invasive valve replacement technology developed internationally in recent years. Its principle is that the valve prosthesis is loaded into the delivery system and delivered to the aortic root through a catheter. The stent release can ensure that the valve is fixed to the aortic valve ring, replacing the original valve with degraded function, so that the patient's heart function is improved. This technology can treat aortic valve disease without opening the chest and without stopping the heart, eliminating the huge trauma caused to patients by surgical thoracotomy and cardiac arrest in the past.

[0003] This technology requires the stent to be compressed to a very small diameter in order to be loaded into the delivery catheter. However, the stent or the valve on the stent is prone to damage to the stent or valve due to excessive compression, uneven compression, or local accidental bending, which ultimately leads to defects in the function of the stent or valve or a reduction in its service life, or even failure to implant and work normally. Especially when loading a self-expanding stent, the tension of the self-expanding stent makes it more difficult to fix and compress it, making it more prone to damage or breakage, making loading more difficult. On the one hand, this places higher technical requirements on the loading personnel, and on the other hand, it also invisibly prolongs the implantation operation time and increases the risk of surgery.

[0004] When using a loading tool to load a valve prosthesis, the guide cap and guide seat are usually used to perform preliminary compression on the stent, and then the inner cavity of the guide seat is used to further compress the inflow channel of the stent until the valve prosthesis is completely compressed. A large number of test results have confirmed that the coaxiality of the loading tool and the stent is very important for the uniform compression and grip of the stent. Existing loading tools need to rely on the operator's manual control to maintain coaxiality, which is relatively demanding on the operator. Although operators will receive technical training, clinical findings show that due to the complexity of interventional aortic valve implantation surgery and the many steps involved, the compression and grip of the stent accounts for a relatively small proportion of it. This part of the operation is often overlooked or the technical points are not mastered properly, resulting in improper compression and grip of the stent, affecting the loading of the stent and even affecting the use of the stent.

[0005] Therefore, a loading device with simple operation and high loading efficiency is needed. Summary of the invention

[0006] The object of the present invention is to provide a loading tool and a medical device for an implant, so as to solve the problem that the existing loading tool needs to be manually operated to maintain coaxial crimping.

[0007] In order to solve the above technical problems, the present invention provides an implant loading tool, comprising: a guide cover and a guide seat for detachably connecting with the guide cover; the guide cover has a first end and a second end opposite to each other in the axial direction, and the guide cover is used to connect with the guide seat in the direction of the second end toward the first end; the guide seat has a third end and a fourth end opposite to each other in the axial direction;

[0008] The guide seat is used to penetrate the guide cover along a first direction from the third end toward the fourth end to perform a first compression on the implant; the guide seat is also used to be detachably connected to the guide cover along a second direction from the fourth end toward the third end to perform a second compression on the implant;

[0009] When the guide seat is connected to the guide cover along the second direction, the guide seat and the guide cover are coaxial, and the guide seat is restricted in radial displacement and axial displacement relative to the guide cover.

[0010] Optionally, the guide cover has a first buckle portion and a fourth buckle portion, and the guide seat has a second buckle portion, a fifth buckle portion and a third buckle portion;

[0011] When the guide seat penetrates the guide cover along the first direction, the first buckle portion is engaged with the second buckle portion, limiting the radial displacement and axial displacement of the guide cover relative to the guide seat, so as to perform a first compression on the implant; after the first buckle portion is engaged with the second buckle portion, when the guide seat continues to penetrate the guide cover along the first direction, the fourth buckle portion is engaged with the fifth buckle portion, limiting the radial displacement, axial displacement and circumferential rotation of the guide cover relative to the guide seat, so as to perform a third compression on the implant;

[0012] When the guide seat is detachably connected to the guide cover along the second direction, the first snap portion and / or the fourth snap portion engage with the third snap portion to limit the radial displacement and axial displacement of the guide cover relative to the guide seat, so as to perform a second compression on the implant.

[0013] Optionally, the first buckle portion includes more than two first buckles, the fourth buckle portion includes more than two second buckles, the guide cover has a plurality of grooves extending along the axial direction, and the grooves are open at the first end; the first buckle and the second buckle are respectively distributed along the circumference of the guide cover, and each of the first buckles is provided with the grooves on both sides of the circumference, and each of the second buckles is provided with the grooves on both sides of the circumference.

[0014] Optionally, the first buckle has a first engaging surface toward the second end and a first coupling surface toward the interior of the guide cover; the second buckle portion has a first inclined surface inclined inward toward the fourth end, a second engaging surface toward the third end, and a second coupling surface toward the outside of the guide seat; the first inclined surface is used to abut against the first coupling surface and push the free end of the first buckle to expand; the first coupling surface is used to abut against the second coupling surface to limit the radial displacement of the guide cover relative to the guide seat; the first engaging surface is used to abut against the second engaging surface to limit the axial displacement of the guide cover relative to the guide seat in the direction toward the second end.

[0015] Optionally, the third snap-in portion includes a snap-in groove, the shape of the snap-in groove along the axial section of the guide seat is adapted to the shape of the first snap-in along the axial section of the guide cover; the first snap-in is used to snap into the snap-in groove to limit the radial displacement and axial displacement of the guide seat relative to the guide cover.

[0016] Optionally, there is a spacing area between two adjacent buckle grooves, the circumferential length of the spacing area is not less than the circumferential length of the first buckle along the guide cover, and the spacing area is used for allowing the first buckle to extend toward the fourth end; the first buckle is used to engage in the buckle groove in a circumferential manner through the circumferential relative rotation of the guide cover and the guide seat.

[0017] Optionally, the buckle groove gradually expands outwards toward the third end from the side wall inside the guide seat.

[0018] Optionally, the second buckle has a second inclined surface facing the outside of the guide cover and a third engaging surface facing the second end direction; the second inclined surface is inwardly inclined toward the first end direction; the fifth buckle portion has a fourth engaging surface facing the fourth end direction, a first limiting surface facing the inside of the guide seat, and two second limiting surfaces arranged opposite to each other along the circumference of the guide seat; the first limiting surface is used to abut against the second inclined surface to push the free end of the second buckle to retract toward the inside of the guide cover; the first limiting surface is used to abut against the outer side wall of the guide cover to limit the radial displacement of the guide cover relative to the guide seat; the third engaging surface is used to abut against the fourth engaging surface to limit the axial displacement of the guide cover relative to the guide seat in the direction toward the second end; the second limiting surface is used to abut against the radial side wall of the second buckle to limit the circumferential rotation of the guide cover relative to the guide seat.

[0019] Optionally, a maximum axial distance between the first buckle portion and the second end is not less than a maximum axial distance between the fourth buckle portion and the second end.

[0020] Optionally, the third snap-fit ​​portion includes a snap-fit ​​plate arranged along the axial direction of the guide seat, the snap-fit ​​plate has a snap-fit ​​hole arranged along the axial direction of the guide seat, the second snap is used to snap into the snap-fit ​​hole, and the third snap-fit ​​surface is used to abut against the side of the snap-fit ​​plate toward the fourth end to limit the radial displacement and axial displacement of the guide seat relative to the guide cover.

[0021] Optionally, the guide cover has a sixth buckle portion, and the guide seat has a third buckle portion;

[0022] When the guide seat is detachably connected to the guide cover along the second direction, the sixth buckle portion is engaged with the third buckle portion to limit the radial displacement and axial displacement of the guide cover relative to the guide seat.

[0023] Optionally, the sixth buckle portion includes more than two third buckles, the guide cover has a plurality of axially extending grooves, and the grooves are open at the first end; the third buckles are distributed circumferentially along the guide cover, and each of the third buckles is provided with the grooves on both sides of the circumference; the third buckle has a third inclined surface facing the outside of the guide cover and a fifth locking surface facing the second end; the third inclined surface is inclined inwardly toward the first end.

[0024] Optionally, the third snap-in portion includes a snap-in plate arranged axially along the guide seat, the snap-in plate having a snap-in hole arranged axially through the guide seat, the third snap is used to snap into the snap-in hole, and the fifth snap-in surface is used to abut against a side of the snap-in plate toward the fourth end to limit the radial displacement and axial displacement of the guide seat relative to the guide cover.

[0025] Optionally, the loading tool of the implant also includes a fixing member, which has an inner hole extending axially therethrough, and is used to be detachably connected to the second end; when the fixing member is connected to the second end, the inner hole is coaxial with the guide cover, and the fixing member is restricted in radial displacement and axial displacement relative to the guide cover.

[0026] Optionally, the fixing member is connected to the guide cover via a thread, a buckle or a pin.

[0027] Optionally, the loading tool of the implant also includes a protective tube, which is used to be detachably inserted into the inner hole; when the protective tube is connected to the fixing member, the protective tube is coaxial with the inner hole, and the protective tube is restricted in radial displacement and axial displacement relative to the fixing member.

[0028] Optionally, the inner diameter of the inner hole is matched with the outer diameter of the protection tube, and the protection tube is used to pass through the inner hole and is restricted by the inner hole in radial displacement relative to the fixing member.

[0029] Optionally, the protective tube has a fifth end and a sixth end opposite to each other in the axial direction, and the protective tube is used to be connected to the fixing member with the sixth end in the direction toward the fifth end; the fixing member has a seventh end and an eighth end opposite to each other in the axial direction, and the protective tube is used to be connected to the protective tube with the eighth end in the direction toward the seventh end; the protective tube has a third limiting surface toward the sixth end; the fixing member has a fourth limiting surface toward the seventh end, and the third limiting surface is used to abut against the fourth limiting surface to limit the axial displacement of the protective tube toward the sixth end relative to the fixing member.

[0030] To solve the above technical problems, the present invention further provides a medical device, which includes a loading tool for the implant as described above, and also includes a conveying device, wherein the loading tool is used to cooperate with the conveying device to load an implant into the conveying device.

[0031] In order to solve the above technical problems, the present invention also provides an implant loading tool, which includes: a guide cover and a guide seat for detachably connecting with the guide cover, at least one of the guide cover and the guide seat has a snap portion; the guide seat has a third end and a fourth end opposite to each other in the axial direction, when the guide seat extends into the guide cover in a first direction from the third end toward the fourth end, the guide seat is used to apply a first compression force to the implant, when the guide seat is detachably connected to the guide cover in a second direction from the fourth end toward the third end, the guide seat is used to apply a second compression force to the implant, when the first compression force or the second compression force is applied, the snap portion is used to limit the guide seat so that it is coaxial with the guide cover.

[0032] In summary, in the loading tool and medical device for implants provided by the present invention, the loading tool for implants includes a guide cover and a guide seat for detachably connecting to the guide cover; the guide seat is used to penetrate the guide cover along a first direction to perform a first compression on the implant; the guide seat is also used to be detachably connected to the guide cover along a second direction opposite to the first direction to perform a second compression on the implant; wherein, when the guide seat is connected to the guide cover along the second direction, the guide seat is coaxial with the guide cover, and the guide seat is restricted in radial displacement and axial displacement relative to the guide cover.

[0033] With such a configuration, the implant is first compressed using the guide cover and the guide seat, and then the guide seat is reversed and connected to the guide cover to perform a second compression on the implant. During the second compression, the guide seat and the guide cover are configured to be coaxial, and the guide seat is restricted in radial displacement and axial displacement relative to the guide cover. Thus, the guide seat is cleverly utilized to compress the implant twice, both forward and reverse, simplifying the structure of the loading tool, and achieving the coaxiality of the guide seat and the guide cover during the second compression, ensuring the coaxial compression and gripping of the implant during the second compression, ensuring the straightness of the entire operation, thereby reducing the difficulty of the operator performing the second compression, and making the entire gripping process more convenient and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Those skilled in the art will appreciate that the accompanying drawings are provided for a better understanding of the present invention and do not constitute any limitation on the scope of the present invention.

[0035] Figure 1 is a schematic diagram of a loading tool for an implant according to a first embodiment of the present invention;

[0036] Figure 2a is a schematic diagram of the first buckle portion and the second buckle portion being engaged and connected with each other in accordance with the first embodiment of the present invention;

[0037] Figure 2b yes Figure 2a Schematic diagram of the axial section;

[0038] Figure 2c yes Figure 2b A magnified view of part A;

[0039] Figure 3a is a schematic diagram of the engagement and connection between the fourth buckle portion and the fifth buckle portion in the first embodiment of the present invention;

[0040] Figure 3b yes Figure 3a Schematic diagram of the axial section;

[0041] Figure 3c yes Figure 3b A magnified view of part B;

[0042] Figure 4 is an axial cross-sectional schematic diagram of the cooperative connection of the fixing member, the protection tube and the guide cover in the first embodiment of the present invention;

[0043] Figure 5a is a schematic diagram of a guide cover according to a first embodiment of the present invention;

[0044] Figure 5b yes Figure 5a A schematic diagram of an axial cross section of a guide cover;

[0045] Figure 5c yes Figure 5a A schematic diagram of the guide cover viewed from the first end to the second end;

[0046] Figure 6a is a schematic diagram of a guide seat according to a first embodiment of the present invention;

[0047] Figure 6b yes Figure 6a A schematic diagram of an axial cross section of a guide seat;

[0048] Figure 6c yes Figure 6a A three-dimensional diagram of a guide seat;

[0049] Figure 7a is a schematic diagram of the first buckle portion and the third buckle portion being engaged and connected in accordance with the first embodiment of the present invention;

[0050] Figure 7b yes Figure 7a Enlarged view of part C;

[0051] Figure 7c is a schematic diagram of a side wall of a buckle slot according to a first embodiment of the present invention;

[0052] Figure 7d yes Figure 7c A magnified view of the D portion;

[0053] Figure 8 is a schematic diagram of an implant according to Embodiment 1 of the present invention;

[0054] Fig. 9 is a schematic diagram of a conveying device according to a first embodiment of the present invention;

[0055] Fig.10a is a schematic diagram of step 1 of the use process of the loading tool of the first embodiment of the present invention;

[0056] Fig.10b yes Fig.10a Schematic diagram of the axial section;

[0057] Fig.11a is a schematic diagram of step 2 of the use process of the loading tool of the first embodiment of the present invention;

[0058] Fig.11b yes Fig.11a Schematic diagram of the axial section;

[0059] Fig.12a is a schematic diagram of step three of the use process of the loading tool of the first embodiment of the present invention;

[0060] Figure 12b yes Fig.12a Schematic diagram of the axial section;

[0061] Fig.12c yes Figure 12b A magnified view of part E;

[0062] Fig.12d yes Figure 12b A schematic diagram of a partial axial cross section of the middle protection tube;

[0063] Fig.13a is a schematic diagram of step 4 of the use process of the loading tool of the first embodiment of the present invention;

[0064] Fig.13b yes Fig.13a Schematic diagram of the axial section;

[0065] Fig.14a is a schematic diagram of a guide cover according to a second embodiment of the present invention;

[0066] Fig.14b yes Fig.14a Schematic diagram of the axial section;

[0067] Fig.15a is a schematic diagram of a guide seat according to a second embodiment of the present invention;

[0068] Fig.15b yes Fig.15a A three-dimensional schematic diagram of

[0069] Fig.16a is a schematic diagram of the first buckle portion and the second buckle portion being engaged and connected with each other in the second embodiment of the present invention;

[0070] Fig.16b is a schematic diagram of the engagement of the fourth buckle portion and the fifth buckle portion in the second embodiment of the present invention;

[0071] Fig.17 is an axial cross-sectional schematic diagram of the fourth buckle portion and the third buckle portion being engaged and connected in the second embodiment of the present invention;

[0072] Fig.18a is a schematic diagram of a guide cover according to a third embodiment of the present invention;

[0073] Fig.18b yes Fig.18a Schematic diagram of the axial section;

[0074] Fig.19a is a schematic diagram of a guide seat according to a third embodiment of the present invention;

[0075] Fig.19b yes Fig.19a A three-dimensional schematic diagram of

[0076] Fig.20a is a schematic diagram of the first buckle portion and the second buckle portion being engaged and connected with each other in the third embodiment of the present invention;

[0077] Fig.20b is a schematic diagram of the engagement of the fourth buckle portion and the fifth buckle portion of the third embodiment of the present invention;

[0078] Fig.21a is an axial cross-sectional schematic diagram of the fourth buckle portion and the third buckle portion being engaged and connected in the third embodiment of the present invention;

[0079] Figure 21b is a three-dimensional diagram of the fourth buckle portion and the third buckle portion of the third embodiment of the present invention being engaged and connected;

[0080] Fig. 22 is a schematic axial cross-sectional view of a guide cover according to a fourth embodiment of the present invention;

[0081] Fig.23 is a schematic axial cross-sectional view of a guide seat according to a fourth embodiment of the present invention;

[0082] Fig.24 It is a partial axial cross-sectional schematic diagram of the guide cover and the guide seat after being matched and connected in the fourth embodiment of the present invention.

[0083] In the attached figure:

[0084] 5-transport device; 54-conical head; 55-fixed head; 56-sheath;

[0085] 9-valve support; 91-hanging ear; 92-outflow duct; 93-inflow duct;

[0086] 10-guide cover; 101-first end; 102-second end; 11-first buckle part; 111-first buckle; 112-first engaging surface; 113-first joint surface; 12-fourth buckle part; 121-second buckle; 122-second inclined surface; 123-third engaging surface; 13-cut groove; 14-sixth buckle part; 141-third buckle; 142-third inclined surface; 143-fifth engaging surface; 151-first section; 152-third section; 153-sixth section; 154-seventh section;

[0087] 20-guide seat; 201-third end; 202-fourth end; 21-second buckle part; 211-first inclined surface; 212-second engaging surface; 213-second joint surface; 22-third buckle part; 221-buckle groove; 222-side wall; 23-fifth buckle part; 231-fourth engaging surface; 232-first limiting surface; 233-second limiting surface; 24-accommodating groove; 25-buckle plate; 251-buckle hole; 261-second section; 262-eighth section; 263-fourth section; 264-fifth section; 265-ninth section;

[0088] 30-fixing member; 301-seventh end; 302-eighth end;

[0089] 40 - protective tube; 401 - fifth end; 402 - sixth end; 41 - third limiting surface. DETAILED DESCRIPTION

[0090] In order to make the purpose, advantages and features of the present invention clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the drawings are all in a very simplified form and are not drawn to scale, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. In addition, the structure shown in the drawings is often a part of the actual structure. In particular, the emphasis of each drawing is different, and sometimes different scales are used.

[0091] As used in the present invention, the singular forms "a", "an" and "the" include plural objects, the term "or" is generally used in a sense including "and / or", the term "several" is generally used in a sense including "at least one", and the term "at least two" is generally used in a sense including "two or more". In addition, the terms "first", "second" and "third" are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", and "third" may explicitly or implicitly include one or at least two of the features. The term "proximal end" is usually the end close to the operator, and the term "distal end" is usually the end close to the patient, that is, the end close to the puncture object. "One end" and "the other end" as well as "proximal end" and "distal end" usually refer to two corresponding parts, which not only include the endpoints. 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 body; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of the two elements or the interaction relationship between the two elements. In addition, as used in the present invention, an element is arranged on another element, which usually only means that there is a connection, coupling, matching or transmission relationship between the two elements, and the connection, coupling, matching or transmission between the two elements can be direct or indirect through an intermediate element, but it cannot be understood as indicating or implying the spatial position relationship between the two elements, that is, an element can be in any orientation such as inside, outside, above, below or on one side of another element, unless the content clearly indicates otherwise. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0092] The core idea of ​​the present invention is to provide an implant loading tool and a medical device to solve the problem that the existing loading tools need to be manually operated to maintain coaxial compression and grip.

[0093] The following description is given with reference to the accompanying drawings.

[0094] [Example 1]

[0095] Please refer to Figures 1 to 13b ,in, Figure 1 is a schematic diagram of a loading tool for an implant according to a first embodiment of the present invention; Figure 2a is a schematic diagram of the first buckle portion and the second buckle portion being engaged and connected with each other in accordance with the first embodiment of the present invention; Figure 2b yes Figure 2a Schematic diagram of the axial section; Figure 2c yes Figure 2b A magnified view of part A; Figure 3a is a schematic diagram of the engagement and connection between the fourth buckle portion and the fifth buckle portion in the first embodiment of the present invention; Figure 3b yes Figure 3a Schematic diagram of the axial section; Figure 3c yes Figure 3b A magnified view of part B; Figure 4 is an axial cross-sectional schematic diagram of the cooperative connection of the fixing member, the protection tube and the guide cover in the first embodiment of the present invention; Figure 5a is a schematic diagram of a guide cover according to a first embodiment of the present invention; Figure 5b yes Figure 5a A schematic axial cross-sectional view of a guide cover; Figure 5c yes Figure 5a A schematic diagram of the guide cover viewed from the first end to the second end; Figure 6a is a schematic diagram of a guide seat according to a first embodiment of the present invention; Figure 6b yes Figure 6a A schematic diagram of an axial cross section of a guide seat; Figure 6c yes Figure 6a A three-dimensional diagram of a guide seat; Figure 7a is a schematic diagram of the first buckle portion and the third buckle portion being engaged and connected in accordance with the first embodiment of the present invention; Figure 7b yes Figure 7a Enlarged view of part C; Figure 7c is a schematic diagram of a side wall of a buckle slot according to a first embodiment of the present invention; Figure 7d yes Figure 7c A magnified view of the D portion; Figure 8 is a schematic diagram of an implant according to Embodiment 1 of the present invention; Fig. 9 is a schematic diagram of a conveying device according to a first embodiment of the present invention; Fig.10a is a schematic diagram of step 1 of the use process of the loading tool of the first embodiment of the present invention; Fig.10b yes Fig.10a Schematic diagram of the axial section; Fig.11a is a schematic diagram of step 2 of the use process of the loading tool of the first embodiment of the present invention; Fig.11b yes Fig.11a Schematic diagram of the axial section; Fig.12a is a schematic diagram of step three of the use process of the loading tool of the first embodiment of the present invention; Figure 12b yes Fig.12a Schematic diagram of the axial section; Fig.12c yes Figure 12b A magnified view of part E; Fig.12d yes Figure 12b A schematic diagram of a partial axial cross section of the middle protection tube; Fig.13a is a schematic diagram of step 4 of the use process of the loading tool of the first embodiment of the present invention; Fig.13b yes Fig.13a Schematic diagram of the axial cross section.

[0096] like Figure 1 to Figure 7d As shown, embodiment 1 of the present invention provides a loading tool for an implant, which includes: a guide cover 10 and a guide seat 20 for detachably connecting with the guide cover 10; the guide cover 10 has a first end 101 and a second end 102 opposite to each other in the axial direction, and the guide cover 10 is used to connect with the guide seat 20 in the direction of the second end 102 toward the first end 101; the guide seat 20 has a third end 201 and a fourth end 202 opposite to each other in the axial direction; the guide seat 20 is used to penetrate the guide cover 10 in the first direction, and is used to apply a first compression force to the implant, and perform a first compression on the implant; the guide seat 20 is also used to be detachably connected with the guide cover 10 in a second direction opposite to the first direction, and is used to apply a second compression force to the implant, and perform a second compression on the implant; the first direction is the direction from the third end 201 toward the fourth end 202, and the second direction is the direction from the fourth end 202 toward the third end 201. When the guide seat 20 is connected to the guide cover 10 along the second direction, the guide seat 20 and the guide cover 10 are coaxial, and the guide seat 20 is restricted from radial displacement and axial displacement relative to the guide cover 10. The first compression process can be referred to Fig.10b and Fig.11b , refers to using the guide seat 20 to perform preliminary compression on the implant inside the guide cover 10. The second compression process can be referred to Fig.13b , refers to using the guide seat 20 to compress the end of the implant, and then loading the implant into the conveying device 5.

[0097] For details, please refer to Figure 5a~6cIn an exemplary embodiment, the guide cover 10 has a through first inner cavity, and the first inner cavity gradually decreases in a step-like manner from the first end 101 toward the second end 102. The guide seat 20 has a receiving groove 24 toward the fourth end 202, and the receiving groove 24 is used to accommodate an end of the implant. The guide seat 20 also has a through second inner cavity, and the second inner cavity is used for a part of the conveying device 5 to pass through; the second inner cavity gradually decreases in a shape from the third end 201 toward the fourth end 202. In practice, the implant is often annular before being loaded into the conveying device 5, so the receiving groove 24 is also configured to be annular to adapt to the end shape of the implant. Please refer to Fig.10b and Fig.11b When the guide seat 20 penetrates the guide cover 10 along the first direction, since the first inner cavity of the guide cover 10 gradually shrinks in a step-like manner along the first direction, the implant can be radially compressed, that is, the first compression.

[0098] After a part of the implant is loaded into the delivery device 5, the guide seat 20 is disassembled and turned over so that the guide seat 20 is assembled and connected with the first end 101 of the guide cover 10 along the second direction, and at the same time, the guide seat 20 is ensured to be coaxial with the guide cover 10 and the relative radial displacement and axial displacement are restricted. In this way, the side wall of the second inner cavity can abut against the inlet channel 93 of the implant to restrict the radial displacement and axial displacement of the implant, so that one end of the inlet channel 93 of the implant is compressed and adapted to the second inner cavity, thereby facilitating the coaxial loading of the implant into the delivery device 5.

[0099] With such configuration, the implant is first compressed by using the guide cover 10 and the guide seat 20, and then the guide seat 20 is reversed and connected to the guide cover 10 to perform a second compression on the implant. During the second compression, the guide seat 20 and the guide cover 10 are configured as coaxial, and the guide seat 20 is restricted in radial displacement and axial displacement relative to the guide cover 10. Thus, the guide seat 20 is cleverly used to compress the implant twice, both forward and reverse, simplifying the structure of the loading tool, and achieving the coaxiality of the guide seat 20 and the guide cover 10 during the second compression, ensuring the coaxial compression and gripping of the implant during the second compression, ensuring the straightness of the entire operation, thereby reducing the difficulty of the operator performing the second compression, reducing the difficulty of the operator's operation, and making the entire gripping process more convenient and efficient. Optionally, at least one of the guide cover 10 and the guide seat 20 has a buckle portion, and when the first compression force or the second compression force is applied, the buckle portion is used to restrict the guide seat 20 to be coaxial with the guide cover 10 .

[0100] Please refer to Figure 5a~Figure 7b , and combined with Figure 2a~Figure 3cPreferably, the guide cover 10 has a first snap-fit ​​portion 11, and the guide seat 20 has a second snap-fit ​​portion 21 and a third snap-fit ​​portion 22; when the guide seat 20 penetrates into the guide cover 10 along the first direction, the first snap-fit ​​portion 11 and the second snap-fit ​​portion 21 are engaged with each other, limiting the radial displacement and axial displacement of the guide cover 10 relative to the guide seat 20, for performing a first compression on the implant; when the guide seat 20 is detachably connected to the guide cover 10 along the second direction, the first snap-fit ​​portion 11 and the third snap-fit ​​portion 22 are engaged with each other, limiting the radial displacement and axial displacement of the guide cover 10 relative to the guide seat 20, for performing a second compression on the implant.

[0101] In an alternative embodiment, the first buckle portion 11 includes more than two first buckles 111, and the more than two first buckles 111 are distributed along the circumference of the guide cover 10. The guide cover 10 has a plurality of slots 13 extending along the axial direction, and the slots 13 are open in the direction of the first end 101, and the guide cover 10 is provided with the slots 13 on both sides of the circumference of the first buckle 111. Preferably, the slots can be of any shape and size, preferably a rectangle, and the axial length along the guide cover 10 is preferably 18-21mm, and the width is 2-4mm; such a configuration can meet both elasticity requirements and strength requirements. More preferably, the guide cover 10 and the guide seat 20 can be made of transparent materials, such as PC or PMMA.

[0102] Preferably, the first buckle 111 has a first engaging surface 112 facing the second end 102 and a first coupling surface 113 facing the inside of the guide cover 10, and the second buckle portion 21 has a first inclined surface 211 inwardly inclined toward the fourth end 202, a second engaging surface 212 facing the third end 201, and a second coupling surface 213 facing the outside of the guide seat 20. In the process of the guide seat 20 penetrating into the first inner cavity, the first coupling surface 113 abuts against the first inclined surface 211, and due to the setting of the groove 13, the free end of the first buckle 111 divided by the groove 13 is gradually pushed by the first inclined surface 211 and expands outward, until the first engaging surface 112 passes over the first inclined surface 211, and the first coupling surface 113 abuts against the second coupling surface 213, thereby limiting the radial displacement of the guide cover 10 relative to the guide seat 20. The first engaging surface 112 is used to abut against the second engaging surface 212 to limit the axial displacement of the guide cover 10 relative to the guide seat 20 in the direction toward the second end 102. When the first engaging surface 112 abuts against the second engaging surface 212, it is regarded as the first buckle portion 11 and the second buckle portion 21 are engaged. It should be noted that this embodiment does not limit the axial displacement of the guide cover 10 relative to the guide seat 20 in the direction toward the first end 101, that is, the guide cover 10 is limited to coaxial fit with the guide seat 20, and the axial unidirectional displacement is limited. When the guide seat 20 continues to move in the direction of the second end 102 of the guide cover 10, the first buckle portion 11 is separated from the second buckle portion 21. In particular, the first buckle portion 11 and the second buckle portion 21 are separated, which means that the first engaging surface 112 and the second engaging surface 212 are separated from the abutment, without limiting the abutment relationship between the first joint surface 113 and the second joint surface 213, that is, the first buckle portion 11 and the second buckle portion 21 are separated, and the guide seat 20 goes deeper into the first inner cavity toward the second end 102, while the radial displacement of the guide cover 10 and the guide seat 20 continues to be limited by the abutment between the first joint surface 113 and the second joint surface 213. With such a configuration, the guide cover 10 and the guide seat 20 can be in a coaxial stable state, which is convenient for the insertion of the conical head of the conveying device 5, so as to facilitate the next step of compression of the implant. It should be noted that in this embodiment, the first snap-fit ​​portion 11 and the second snap-fit ​​portion 21 realize the axial limitation of the guide cover 10 and the guide seat 20 by the way that the first snap-fit ​​surface 112 and the second snap-fit ​​surface 212 abut against each other, and in some other embodiments, the first snap-fit ​​portion 11 and the second snap-fit ​​portion 21 can also realize the axial limitation of the guide cover 10 and the guide seat 20 by the snap-fit ​​form fixed by friction force, or other forms of cooperation such as the snap-fit ​​form of the groove and the protrusion. Preferably, the first snap-fit ​​surface 112 is circumferentially distributed around the axis of the guide cover 10, and the second snap-fit ​​surface 212 is circumferentially distributed around the axis of the guide seat 20, and when the first snap-fit ​​portion 11 and the second snap-fit ​​portion 21 are engaged, the guide cover 10 and the guide seat 20 remain coaxial.

[0103] Furthermore, the guide cover 10 has a fourth snap-fit ​​portion 12, and the guide seat 20 has a fifth snap-fit ​​portion 23; after the first snap-fit ​​portion 11 is engaged with the second snap-fit ​​portion 21, when the guide seat 20 continues to penetrate the guide cover 10 along the first direction, the fourth snap-fit ​​portion 12 is engaged with the fifth snap-fit ​​portion 23, thereby limiting the radial displacement, axial displacement and circumferential rotation of the guide cover 10 relative to the guide seat 20, so as to perform a third compression on the implant.

[0104] In an alternative embodiment, the fourth buckle portion 12 includes more than two second buckles 121, and the more than two second buckles 121 are distributed along the circumference of the guide cover 10, and the guide cover 10 is provided with the grooves 13 on both sides of the circumference of the second buckles 121. It should be understood that the grooves 13 on both sides of the second buckle 121 may overlap with the grooves 13 on both sides of the first buckle 111, that is, there may be only one groove 13 between the second buckle 121 and the first buckle 111. Optionally, the second buckle 121 is an active buckle, preferably an elastic buckle. The shape of the second buckle 121 is not limited. Preferably, in the fourth buckle portion 12, the number of second buckles 121 is not limited to ensure circumferential and axial positioning when the guide cover 10 and the guide seat 20 are combined; as Figure 5c As shown, the number of the second buckles 121 is preferably two, which are arranged axially symmetrically in the circumferential direction of the guide cover 10. Optionally, the outer surface of the second buckle 121 and the outer surface of the fifth buckle portion 23 are marked with the same mark for easy operation.

[0105] Preferably, the second buckle 121 has a second inclined surface 122 inwardly inclined toward the first end 101 and a third engaging surface 123 toward the second end 102; the fifth buckle portion 23 has a fourth engaging surface 231 toward the fourth end 202 and a first limiting surface 232 toward the inside of the guide seat 20; after the first buckle portion 11 is engaged with the second buckle portion 21, the guide seat 20 continues to move along the first direction to the inside of the guide cover 10, the first limiting surface 232 abuts against the second inclined surface 122, and pushes the second inclined surface 122 toward the guide cover 10 The guide seat 20 moves inside the guide cover 10, and the free end of the second buckle 121 divided by the groove 13 is gradually pushed and retracted to the inside of the guide cover 10, until the third engaging surface 123 passes over the first limiting surface 232, and the free end of the second buckle 121 pops outward, and the outer wall of the guide cover 10 abuts against the first limiting surface 232, limiting the radial displacement of the guide cover 10 relative to the guide seat 20; and the third engaging surface 123 abuts against the fourth engaging surface 231, limiting the axial displacement of the guide cover 10 relative to the guide seat 20 toward the second end 102. When the third engaging surface 123 abuts against the fourth engaging surface 231, it is regarded that the fourth buckle part 12 is engaged with the fifth buckle part 23. Preferably, when the fourth buckle part 12 is engaged with the fifth buckle part 23, the guide cover 10 and the guide seat 20 remain coaxial.

[0106] Furthermore, the fifth buckle portion 23 also has two second limiting surfaces 233 arranged opposite to each other along the circumferential direction of the guide seat 20. The distance between the two second limiting surfaces 233 matches the radial width of the second buckle 121 between two adjacent slots 13, that is, the distance between the two second limiting surfaces 233 is equal to or slightly larger than the radial width of the second buckle 121. The second limiting surfaces 233 are used to abut against the radial side wall of the second buckle 121 to limit the circumferential rotation of the guide cover 10 relative to the guide seat 20. Figure 3a As shown, when the fourth buckle portion 12 is engaged with the fifth buckle portion 23 , the two radial side walls of the second buckle 121 abut against the two second limiting surfaces 233 of the fifth buckle portion 23 .

[0107] Please refer to Fig.11b and Figure 12b When the fourth buckle portion 12 is engaged with the fifth buckle portion 23, the guide cover 10 and the guide seat 20 have no radial displacement, axial displacement or circumferential rotation, and the guide cover 10 and the guide seat 20 are in a relatively fixed state, which can prevent the implant from twisting, tilting or wearing during the compression process, and facilitate the third compression of the implant through the delivery device 5.

[0108] Preferably, the maximum axial distance of the first buckle portion 11 relative to the second end 102 is not less than the maximum axial distance of the fourth buckle portion 12 relative to the second end 102. With this configuration, the fourth buckle portion 12 does not exceed the first buckle portion 11 in the direction toward the first end 101, which significantly reduces the size of the guide cover 10, makes it easier to carry out packaging, sterilization and other process operations, and also reduces costs.

[0109] Please refer to Figure 7a~Figure 7d , and combined with Fig.13a and Fig.13b Preferably, the third buckle portion 22 includes a buckle groove 221, and the shape of the buckle groove 221 along the axial section of the guide seat 20 is adapted to the shape of the first buckle 111 along the axial section of the guide cover 10. After the fourth buckle portion 12 is engaged with the fifth buckle portion 23 and the third compression of the implant is completed, the guide seat 20 can be detached from the guide cover 10, and then the guide seat 20 is turned over so that the guide seat 20 is arranged along the second direction, and the third buckle portion 22 of the guide seat 20 is assembled and connected with the first buckle portion 11 of the guide cover 10. Specifically, the first buckle 111 can be engaged in the buckle groove 221, and the radial and axial displacements are limited by the buckle groove 221, thereby limiting the radial displacement and axial displacement of the guide seat 20 relative to the guide cover 10. Further, the position of the inflow channel 93 of the implant is limited by the second inner cavity of the guide seat 20. Preferably, the buckle grooves 221 are distributed circumferentially around the axis of the guide seat 20 , so that after the first buckle 111 is engaged in the buckle groove 221 , the guide cover 10 and the guide seat 20 remain coaxial.

[0110] It should be understood that the shape of the axial section of the buckle groove 221 along the guide seat 20 is adapted to the shape of the axial section of the first buckle 111 along the guide cover 10, and is not limited to the shape of the axial section of the buckle groove 221 being exactly the same as the shape of the axial section of the first buckle 111. The buckle groove 221 is slightly larger than the first buckle 111, or the buckle groove 221 is the same as the first buckle 111. It can also be that the shape of the axial section of the buckle groove 221 can envelop the shape of the axial section of the first buckle 111. In some embodiments, the axial section of the buckle groove 221 is L-shaped, T-shaped, or J-shaped, etc. The first buckle 111 can be completely accommodated in the buckle groove 221, and the buckle groove 221 is abutted and connected through the corner or edge to achieve the limit of the first buckle 111 by the buckle groove 221. Preferably, the number of the buckle grooves 221 is not less than the number of the first buckles 111, and the number of the buckle grooves 221 can be 2, 3 or 4. The setting of the third snap portion 22 cleverly reuses the first snap portion 11, simplifies the structure of the loading tool, and realizes the third snapping after the first snap portion 11 is snapped with the second snap portion 21, and the fourth snap portion 12 is snapped with the fifth snap portion 23. After the third snapping, the coaxiality of the loading tool and the implant is guaranteed.

[0111] Preferably, the snap grooves 221 are distributed at intervals along the circumference of the guide seat 20, and there is a spacing area between two adjacent snap grooves 221, which is a notch portion extending along the circumference of the guide seat 20, and the circumferential length of the spacing area is not less than the circumferential length of the first snap 111 along the guide cover 10, and the spacing area is used for the first snap 111 to extend toward the fourth end 202, and then rotate the guide cover 10 and the guide seat 20 relative to each other around the axis, so that the first snap 111 can be snapped into the snap groove 221 in a circumferential manner.

[0112] Please refer to Figure 7c and Figure 7d Preferably, the buckle groove 221 gradually expands outwards toward the third end 201 from the side wall 222 inside the guide seat 20 , so that the first buckle 111 can be smoothly engaged in the buckle groove 221 . Figure 7c and Figure 7d The state when the second buckle 121 is inserted into the buckle slot 221 is shown. It can be understood that the first buckle 111 is located in the spacing area at this time. On this basis, the guide cover 10 and the guide seat 20 are relatively rotated, so that the first buckle 111 can be engaged with the buckle slot 221 along the circumferential direction, and the second buckle 121 can exit the buckle slot 221 and enter the spacing area.

[0113] Please refer to Figure 4 , Figures 10a to 13bPreferably, the implant loading tool further comprises a fixing member 30, the fixing member 30 having an inner hole extending in the axial direction, and the fixing member 30 is used to be detachably connected to the second end 102; when the fixing member 30 is connected to the second end 102, the inner hole is coaxial with the guide cover 10, and the fixing member 30 is limited in radial displacement and axial displacement relative to the guide cover 10. In one embodiment, the fixing member 30 has an inner hole extending in the axial direction, the inner hole can be passed through by the conveying device 5, and can produce a certain radial limiting effect on the conveying device 5. When the fixing member 30 is assembled and connected with the second end 102 of the guide cover 10, the inner hole is coaxial with the guide cover 10, so that the coaxiality of the conveying device 5 and the guide cover 10 is ensured. Optionally, the fixing member 30 is connected to the guide cover 10 by a thread, a buckle or a pin, and the fixing member 30 is preferably connected to the guide cover 10 by a thread, which can ensure the coaxiality of the fixing member 30 and the guide cover 10.

[0114] Furthermore, the implant loading tool further comprises a protection tube 40, which is used to be detachably inserted into the inner hole; when the protection tube 40 is connected to the fixing member 30, the protection tube 40 is coaxial with the inner hole, and the protection tube 40 is restricted in radial displacement and axial displacement relative to the fixing member 30. Optionally, the inner diameter of the inner hole is matched with the outer diameter of the protection tube 40, and the protection tube 40 is used to be inserted into the inner hole, and is restricted in radial displacement relative to the fixing member 30 by the inner hole. The provision of the protection tube 40 and the fixing member 30 can realize the stable axial combination of the guide seat 20, the guide cover 10, the fixing member 30 and the protection tube 40, and realize the coaxiality of the four, thereby reducing the difficulty of crimping and lowering the requirements for the operator.

[0115] In an exemplary embodiment, the protection tube 40 has a fifth end 401 and a sixth end 402 opposite to each other in the axial direction, and the protection tube 40 is used to connect to the fixing member 30 in the direction of the sixth end 402 toward the fifth end 401; the fixing member 30 has a seventh end 301 and an eighth end 302 opposite to each other in the axial direction, and the protection tube 40 is used to connect to the protection tube 40 in the direction of the eighth end 302 toward the seventh end 301; the protection tube 40 has a third limiting surface 41 facing the sixth end 402; the fixing member 30 has a fourth limiting surface facing the seventh end 301, and the third limiting surface 41 is used to abut against the fourth limiting surface to limit the axial displacement of the protection tube 40 relative to the fixing member 30 toward the sixth end 402. For the specific configuration of the protection tube 40, reference may be made to the patent application with publication number CN209827106U, the entire contents of which are incorporated herein by reference.

[0116] Please refer to Figures 9 to 13b This embodiment also provides a medical device, including the implant loading tool as described above, and also including a conveying device 5, wherein the implant loading tool is used to cooperate with the conveying device 5 to load an implant into the conveying device 5. The implant here refers to a compressible implant, such as a heart valve stent, etc. The present invention does not specifically limit the geometric shape and material of the implant, and it can be any existing implant in the art.

[0117] The following uses a valve stent 9 as an example of an implant, and describes the use of the implant loading tool, as well as the structure and principle of the medical device, in conjunction with the accompanying drawings.

[0118] Please refer to Figure 8 , which shows a valve stent 9, including an outflow channel 92, an inflow channel 93 and a lug 91. The valve stent 9 is compressed and loaded into the delivery device 5 by the loading tool provided in this embodiment with the assistance of the delivery device 5. Then, in use, the valve stent 9 is delivered into the patient's body to the target area by the delivery device 5 through the catheter in a contracted state and released to expand into a shape as shown in FIG. Figure 8 Status shown.

[0119] Please refer to Fig. 9 , which is a delivery device 5, including a conical head 54, a fixed head 55, a sheath 56, a catheter and a handle (not shown), the conical head 54 is fixedly connected to the fixed head 55, and the fixed head 55 is inserted into the sheath 56. The fixed head 55 is fixed to the handle through a connector, and the sheath 56 moves under the control of the handle, and the fixed head 55 is relatively exposed, so that the fixed head 55 is used to connect with the ear 91 of the valve stent 9, so as to apply force to the valve stent 9 as a force-applying end. In an optional embodiment, the fixed head 55 has a circumferentially arranged groove, and the ear 91 can be snapped into the groove to achieve a matching connection with the fixed head 55. After the ear 91 is matched and connected with the fixed head 55, the axial relative position of the valve stent 9 and the fixed head 55 is defined.

[0120] like Fig.10a and Fig.10bAs shown, when the implant loading tool is used, the inflow channel 93 of the valve stent 9 is first placed on the receiving groove 24 of the guide seat 20, and then the guide cover 10 is pressed from the outflow channel 92 of the valve stent 9 in the direction of the guide seat 20 along the first direction (that is, the guide seat 2 penetrates into the first inner cavity), so that the first buckle portion 11 of the guide cover 10 is matched and engaged with the second buckle portion 21 of the guide seat 20, so that the guide cover 10 and the guide seat 20 are relatively fixed axially. At this time, since one end of the valve stent 9 is limited by the receiving groove 24, it is compressed for the first time by the first inner cavity of the guide cover 10. At this time, since the first buckle portion 11 is matched and engaged with the second buckle portion 21, the guide cover 10 and the guide seat 20 form a first locking state, and the guide cover 10, the guide seat 20 and the valve stent 9 are in a coaxial stable state, which is convenient for inserting the conical head 54 to complete the first compression.

[0121] Further, the conical head 54 is inserted into the second inner cavity from the fourth end 202 of the guide seat 20 (at this time, the guide cover 10 and the guide seat 20 are in the first locking state, and the valve stent 9 is installed between the guide cover 10 and the guide seat 20), and then, the ear 91 is roughly aligned with the fixed head 55, and then the guide cover 10 is continuously pushed along the first direction toward the direction of the guide seat 20, so that the fourth buckle portion 12 is engaged with the fifth buckle portion 23. During this process, the outflow channel 92 of part of the valve stent 9 is pushed out from the second end 102 of the guide cover 10, forming a fixed fit among the guide cover 10, the guide seat 20 and the valve stent 9, so as to facilitate the ear 91 to be stuck in the groove of the fixed head 55, as shown in FIG. Fig.11a and Fig.11b As shown. After confirming that the ear 91 is inserted into the groove of the fixing head 55, the sheath 56 is moved in the direction of the inflow channel 93 (i.e., the direction of the third end 201 of the guide seat 20, the right side in the figure) by operating the handle, driving the valve stent 9 to move inside the sheath 56, so that the valve stent 9 begins to be loaded into the sheath 56. The third compression is completed. During the first and third compressions of the valve stent 9, since the guide cover 10 and the guide seat 20 can achieve radial, circumferential and axial fixation, the valve stent 9 can be effectively prevented from twisting, tilting or wearing during the compression process, so that the compression process of the valve stent 9 can be carried out smoothly.

[0122] Please refer to Fig.12a and Figure 12bAfter completing the third compression of the valve stent 9, the fixing member 30 is connected to the guide cover 10, such as tightening the thread of the fixing member 30, and fixing the guide cover 10, the guide seat 20, the fixing member 30 and the protective tube 40 as a whole. After confirming that the lug 91 of the valve stent 9 has not disengaged from the groove of the fixing member 30 of the conveying device 5, the operator moves the sheath 56 toward the distal end of the conveying device 5 by operating the handle. Until about one-third of the valve stent 9 enters the sheath 56, the guide cover 10 and the guide seat 20 are fixed circumferentially and axially during the operation, which prevents the valve stent from twisting, tilting or wearing during the compression process, so that the compression is carried out smoothly. So far, the preliminary loading of the valve stent 9 is completed.

[0123] Please refer to Fig.13a and Fig.13b After completing the initial loading of the valve stent 9, press the fourth buckle part 12 to separate the guide seat 20 and the guide cover 10 to expose the valve stent 9, invert the guide seat 20, and move the first end 101 of the guide cover 10 along the second direction, and use the second inner cavity of the guide seat 20 to abut against the inlet channel 93 of the valve stent 9, so that one end of the inlet channel 93 of the implant is compressed and adapted to the second inner cavity, and then the first buckle part 11 is engaged with the third buckle part 22, so that the guide cover 10, the guide seat 20 and the valve stent 9 are coaxially fixed again, and then, by continuing to operate the handle, the sheath 56 is pushed forward, and then the valve stent 9 is pulled to move to the left in the figure, the valve stent 9 is compressed for the second time, and the valve stent 9 is completely loaded into the sheath 56, that is, the loading process of the entire valve stent 9 is completed. During the second compression of the valve stent 9, the valve stent 9 is limited by the second inner cavity of the guide seat 20, which ensures the coaxiality of the valve stent 9 and the conveying device 5, solving the problem that the existing loading tool needs to be manually operated to maintain the coaxial compression grip. At the same time, the loading tool has a small number of parts, a simple structure, a low manufacturing cost, and is easy to operate.

[0124] [Example 2]

[0125] Please refer to Figures 14a to 17 ,in, Fig.14a is a schematic diagram of a guide cover according to a second embodiment of the present invention; Fig.14b yes Fig.14a Schematic diagram of the axial section; Fig.15a is a schematic diagram of a guide seat according to a second embodiment of the present invention; Fig.15b yes Fig.15a A three-dimensional schematic diagram of Fig.16a is a schematic diagram of the first buckle portion and the second buckle portion being engaged and connected with each other in the second embodiment of the present invention; Fig.16b is a schematic diagram of the engagement of the fourth buckle portion and the fifth buckle portion in the second embodiment of the present invention; Fig.17It is a schematic axial cross-sectional view of the fourth buckle portion and the third buckle portion being engaged and connected in the second embodiment of the present invention.

[0126] The implant loading tool and the medical device provided in the second embodiment of the present invention are substantially the same as the implant loading tool and the medical device provided in the first embodiment, and the same parts will not be described again, and only the differences will be described below.

[0127] like Figures 14a to 17 As shown, in the loading tool for the implant provided in Embodiment 2, after completing the first compression and the third compression, when the guide seat 20 is detachably connected to the guide cover 10 along the second direction, the fourth snap portion 12 is engaged with the third snap portion 22, limiting the radial displacement and axial displacement of the guide cover 10 relative to the guide seat 20, for performing a second compression on the implant.

[0128] In an exemplary embodiment, the third snap-fit ​​portion 22 includes a snap-fit ​​plate 25 arranged along the axial direction of the guide seat 20, the snap-fit ​​plate 25 has a snap-fit ​​hole 251 arranged along the axial direction of the guide seat 20, the second snap 121 is used to snap into the snap-fit ​​hole 251, and the third snap-fit ​​surface 123 is used to abut against the side of the snap-fit ​​plate 25 facing the fourth end 202 to limit the radial displacement and axial displacement of the guide seat 20 relative to the guide cover 10.

[0129] Preferably, the number of the buckle holes 251 is not less than the number of the second buckles 121 .

[0130] In the second embodiment, the fourth snap-on portion 12 is cleverly reused, and the implant is compressed for the second time by engaging the fourth snap-on portion 12 with the third snap-on portion 22, thereby streamlining the structure of the loading tool. After the first snap-on portion 11 is engaged with the second snap-on portion 21, and after the fourth snap-on portion 12 is engaged with the fifth snap-on portion 23, the third engagement is achieved, and after the third engagement, the coaxiality of the loading tool and the implant is ensured.

[0131] In accordance with the position of the snap plate 25, the maximum axial distance of the first snap portion 11 relative to the second end 102 is preferably greater than the maximum axial distance of the fourth snap portion 12 relative to the second end 102, so that when the guide seat 20 is detachably connected to the guide cover 10 along the second direction, the second snap 121 can engage with the snap plate 25 before the first snap 111 abuts against the guide seat 20.

[0132] It should be noted that the method of utilizing the fourth snap portion 12 to engage with the third snap portion 22 provided in the second embodiment can be used together with the method of utilizing the first snap portion 11 to engage with the third snap portion 22 provided in the first embodiment. Specifically, the third snap portion 22 includes a snap groove 221 and a snap plate 25. After completing the first compression and the third compression, when the guide seat 20 is detachably connected to the guide cover 10 along the second direction, the first snap 111 is snap-connected with the snap groove 221, and the second snap 121 can be snap-connected with the snap plate 25.

[0133] [Example 3]

[0134] Please refer to Figures 18a to 21b ,in, Fig.18a is a schematic diagram of a guide cover according to a third embodiment of the present invention; Fig.18b yes Fig.18a Schematic diagram of the axial section; Fig.19a is a schematic diagram of a guide seat according to a third embodiment of the present invention; Fig.19b yes Fig.19a A three-dimensional schematic diagram of Fig.20a is a schematic diagram of the first buckle portion and the second buckle portion being engaged and connected with each other in the third embodiment of the present invention; Fig.20b is a schematic diagram of the engagement of the fourth buckle portion and the fifth buckle portion of the third embodiment of the present invention; Fig.21a is an axial cross-sectional schematic diagram of the fourth buckle portion and the third buckle portion being engaged and connected in the third embodiment of the present invention; Figure 21b It is a three-dimensional diagram of the fourth buckle portion and the third buckle portion of the third embodiment of the present invention being engaged and connected.

[0135] The implant loading tool and the medical device provided in the third embodiment of the present invention are substantially the same as the implant loading tool and the medical device provided in the first embodiment, and the same parts will not be described again, and only the differences will be described below.

[0136] like Figures 18a to 21b As shown, in the loading tool for the implant provided in the third embodiment, after the first compression and the third compression are completed, the first snap-fit ​​portion 11 or the fourth snap-fit ​​portion 12 is not used to snap-fit ​​and connect with the third snap-fit ​​portion 22, but the sixth snap-fit ​​portion 14 separately provided on the guide cover 10 is used to snap-fit ​​and connect with the third snap-fit ​​portion 22.

[0137] Specifically, the guide cover 10 has a sixth snap-fit ​​portion 14. When the guide seat 20 is detachably connected to the guide cover 10 along the second direction, the sixth snap-fit ​​portion 14 engages with the third snap-fit ​​portion 22 to limit the radial displacement and axial displacement of the guide cover 10 relative to the guide seat 20, thereby performing a second compression on the implant.

[0138] In an exemplary embodiment, the sixth buckle portion 14 includes more than two third buckles 141, the guide cover 10 has a plurality of slots 13 extending in the axial direction, and the slots 13 are open in the direction of the first end 101; the third buckles 141 are distributed along the circumference of the guide cover 10, and each of the third buckles 141 is provided with the slots 13 on both sides of the circumference; the third buckle 141 has a third inclined surface 142 facing the outside of the guide cover 10 and a fifth engaging surface 143 facing the direction of the second end 102; the third inclined surface 142 is inwardly inclined toward the direction of the first end 101. It should be understood that the slots 13 on both sides of the third buckle 141 may overlap with the slots 13 on both sides of the first buckle 111 or the slots 13 on both sides of the second buckle 121, that is, there may be only one slot 13 between the two sides of the third buckle 141 and the second buckle 121 or the first buckle 111.

[0139] Preferably, in the sixth buckle portion 14 , the number of the third buckles 141 is not limited to ensure that the guide cover 10 and the guide seat 20 can be reliably positioned when combined; the number of the third buckles 141 is preferably 2, which are arranged axially symmetrically in the circumferential direction of the guide cover 10 .

[0140] [Example 4]

[0141] Please refer to Figure 22 to Figure 24 ,in, Fig. 22 is a schematic axial cross-sectional view of a guide cover according to a fourth embodiment of the present invention; Fig.23 is a schematic axial cross-sectional view of a guide seat according to a fourth embodiment of the present invention; Fig.24 It is a partial axial cross-sectional schematic diagram of the guide cover and the guide seat after being matched and connected in the fourth embodiment of the present invention.

[0142] The implant loading tool and the medical device provided in the fourth embodiment of the present invention are substantially the same as the implant loading tool and the medical device provided in the first embodiment, and the same parts will not be described again, and only the differences will be described below.

[0143] In the fourth embodiment, the steps of performing the first compression, the third compression and the second compression on an implant using the guide cover 10 and the guide seat 20 are the same as those in the first embodiment, and reference may be made to the description of the steps of using the loading tool in the first embodiment. The fourth embodiment describes the specific structures of the guide cover 10 and the guide seat 20 in detail.

[0144] Please refer to Figure 22 to Figure 24In the guide cover 10, the first inner cavity includes a first section 151, the first section 151 is located at the second end 102, and the first section 151 is in the shape of a truncated cone expanding from the second end 102 toward the first end 101; the side wall of the first section 151 forms a first angle θ1 with the axis of the guide cover 10; the outer periphery of the guide seat 20 includes a second section 261 for matching with the first section 151, and the second section 261 is in the shape of a truncated cone expanding from the fourth end 202 toward the third end 201; the side wall of the second section 261 forms a second angle θ3 with the axis of the guide seat 20, and the second angle θ3 is smaller than the first angle θ1.

[0145] After the guide seat 20 is inserted into the first inner cavity of the guide cover 10 along the first direction and the fourth buckle portion 12 is engaged with the fifth buckle portion 23, the valve stent 9 is subjected to a third compression. At this time, the fourth end 202 of the guide seat 20 passes through the first inner cavity and exceeds the second end of the guide cover 10. At this time, the second section 261 is opposite to and close to the first section 151, and the two are used to abut against the inner and outer sides of the valve stent 9 at the same time, that is, it is understood that the second section 261 cooperates with the first section 151.

[0146] Combination Fig.11b It can be understood that at this time, the contour shape of the valve stent 9 is mainly limited by the first inner cavity of the guide cover 10 and a part of the outer contour of the guide seat 20 close to the fourth end 202. The ear 91 of the valve stent 9 extends out of the second end of the guide cover 10 along the first direction and is connected with the fixed head 55 of the conveying device 5.

[0147] It is understandable that the extension direction of the ear 91 depends on the shape of the first inner cavity near the second end 102 and the shape of the guide seat 20 near the fourth end 202. The inventor found through research that when the second angle θ3 is less than the first angle θ1, the ear 91 of the valve stent 9 in the gripping state can present a suitable angle, so that the ear 91 can effectively and firmly cooperate with the fixed head 55 on the delivery system 5 without being separated from the fixed head 55, thereby facilitating the next step of compression (i.e., the second compression). Since the first section 151 and the second section 261 are both truncated cone-shaped, the valve stent 9 can always be kept in a steady state, and the entire circumference of the valve stent 9 can be ensured to be regularly compressed, avoiding the valve stent 9 from having an irregular compression shape.

[0148] Furthermore, the first inner cavity further includes a third section 152 adjacent to the first section 151, the third section 152 is located on the side of the first section 151 close to the first end 101, the third section 152 is in the shape of a truncated cone that expands from the second end 102 toward the first end 101, and the connection between the first section 151 and the third section 152 only bulges inward; the side wall of the third section 152 forms a third angle θ2 with the axis of the guide cover 10, and the first angle θ1 is smaller than the third angle θ2. It should be noted that the connection between the first section 151 and the third section 152 only bulges inward means that the connection between the first section 151 and the third section 152 will not form a recessed area facing the inside of the guide cover 10. In one embodiment, the first section 151 and the third section 152 are both truncated cone-shaped, and the first section 151 and the third section 152 can be directly connected, that is, the lower bottom surface of the first section 151 (that is, the bottom surface close to the first end 101) and the upper bottom surface of the third section 152 (that is, the bottom surface close to the second end 102) overlap in the axial direction of the guide cover 10. At this time, the lower bottom surface of the first section 151 and the upper bottom surface of the third section 152 should be configured to be the same size, and the two are arranged to overlap. With this configuration, the side wall of the first section 151 and the side wall of the third section 152 form an angle connection, and the angle only protrudes toward the inner direction of the guide cover 10. In some other embodiments, the first section 151 and the third section 152 may also be connected by an additional transition section, such as the first section 151 and the third section 152 are connected by a smooth inwardly protruding curve, or are connected by a plurality of fold lines protruding toward the inner direction of the guide cover 10, which should still be regarded as the first section 151 and the third section 152 being in an adjacent relationship. However, it should be understood that no folded angle or arc surface that is concave toward the inner direction of the guide cover 10 should appear. The connection between the first section 151 and the third section 152 only protrudes inward to ensure that the valve support 9 will not be stuck in the first inner cavity. The expressions "only protruding inward" and "only protruding outward" between other sections below can be understood with reference to the connection between the first section 151 and the third section 152.

[0149] Optionally, the first inner cavity also includes an adjacent sixth section 153 and a seventh section 154, the sixth section 153 is located on a side of the third section 152 close to the first end 101, and the seventh section 154 is located on a side of the sixth section 153 close to the first end 101; the sixth section 153 is cylindrical, and the seventh section 154 is a truncated cone that expands from the second end 102 toward the first end 101; the connection between the sixth section 153 and the third section 152 only protrudes inward, and the connection between the seventh section 154 and the sixth section 153 only protrudes inward.

[0150] The first inner cavity is mainly used to compress the valve stent 9, so it also includes several sections with different inner diameters. The setting of the sixth section 153 and the seventh section 154 can make the valve stent 9 achieve a smooth transition. The entire first inner cavity adopts a four-section design, the purpose of which is to allow the valve stent 9 to be compressed and fixed in sections, which not only reduces the strength of the loaders, but also reduces the complexity of loading. In an exemplary embodiment, the maximum diameter of the seventh section 154 (that is, the bottom surface of the seventh section 154 close to the first end 101) should be greater than the maximum outer diameter of the valve stent 9 when it is in an expanded state, so that the valve stent 9 can enter the seventh section 154 unimpeded and be compressed.

[0151] Preferably, the side wall of the seventh section 154 forms a sixth angle θ6 with the axis of the guide cover 10, and the range of the sixth angle θ6 is between 25° and 30°. The inventor has verified through mechanical calculations and experiments that when the sixth angle θ6 is between 25° and 30°, the compression of the valve stent 9 can be kept in a moderate state. The sixth section 153 adopts a cylindrical design, and its side wall is parallel to the axis of the guide cover 10. Preferably, the diameter of the sixth section 153 is about three quarters of the maximum outer diameter of the valve stent 9 when it is in an expanded state. Such a configuration can not only stabilize the inflow channel 93, so that the guide cover 10, the valve stent 9 and the guide seat 20 are relatively fixed, but also can play a role in compressing only the outflow channel 92 without affecting the inflow channel 93 part.

[0152] Optionally, the third angle θ2 is in the range of 25° to 30°. The third section 152 is used to further compress the valve stent 9. Similarly, through mechanical calculation and experimental verification, when the third angle θ2 is between 25° and 30°, the compression of the valve stent 9 can be kept in a moderate state, reducing the difficulty of the operator to apply force and achieving the purpose of gradual compression. In a preferred embodiment, the third angle θ2 and the sixth angle θ6 can be set to the same angle.

[0153] Preferably, the second angle θ3 is in the range of 6.5° to 8.5°, and the first angle θ1 is in the range of 12.5° to 17.5°; more preferably, the first angle θ1 is 15°. According to finite element simulation and experiments, the lug 91 of the valve stent 9 can be fixed inward without being too tight to cause excessive deformation. Fig.24 The special taper design of the first section 151 and the second section 261 can keep the valve stent 9 in a steady state and ensure that the entire circumference of the valve stent 9 is compressed regularly, thereby preventing the valve stent 9 from having an irregular compression shape.

[0154] Optionally, the outer periphery of the guide seat 20 further includes an eighth section 262, the eighth section 262 is located at the fourth end 202 and is adjacent to the second section 261; the side wall of the eighth section 262 forms a seventh angle θ7 with the axis of the guide seat 20, and the seventh angle θ7 is greater than the second angle θ3; the connection between the eighth section 262 and the second section 261 only protrudes toward the outside. The eighth section 262 has a larger inward angle relative to the second section 261 along the first direction, which can avoid obstruction and scratching of the valve support 9. Preferably, the seventh angle θ7 ranges from 15° to 20°.

[0155] Please refer to Fig.23 In the guide seat 20, the second inner cavity includes a fourth section 263 and a fifth section 264 adjacent to each other, the fourth section 263 is located at the third end 201, and the fifth section 264 is located on the side of the fourth section 263 close to the fourth end 202; the fourth section 263 and the fifth section 264 are both in the shape of a truncated cone expanding from the fourth end 202 toward the third end 201; the connection between the fourth section 263 and the fifth section 264 only protrudes inward; the side wall of the fourth section 263 forms a fourth angle θ4 with the axis of the guide seat 20, the side wall of the fifth section 264 forms a fifth angle θ5 with the axis of the guide seat 20, and the fourth angle θ4 is greater than the fifth angle θ5.

[0156] After completing the third compression of the valve stent 9, the guide seat 20 is used to assemble and connect with the first end 101 of the guide cover 10 along the second direction, and is used to perform the second compression on the valve stent 9. The second compression process is mainly performed by limiting one end of the inflow channel 93 of the valve stent 9 through the second inner cavity of the guide seat 20, and cooperating with the conveying device 5. Optionally, the second inner cavity can be designed with several sections of different inner diameters to achieve a smooth transition of the valve stent 9. In an alternative embodiment, the second inner cavity also includes a ninth section 265 connected to the side of the fifth section 264 close to the fourth end 202, and the ninth section 265 is a cylindrical tube section. In the final stage of the second compression, the valve stent 9 will be pushed into the ninth section 265 for the final radial compression. Optionally, the ninth section 265 is smoothly connected to the fifth section 264, and the connection between the two only protrudes inward. The diameter of the ninth section 265 is set to be slightly larger than the outer diameter of the valve stent 9 after being compressed, and the axial length of the ninth section 265 is preferably greater than 25 mm to stabilize the valve stent 9 in its internal area.

[0157] exist Fig.23In the illustrated example, the second inner cavity adopts a three-stage design, and the maximum diameter of the fourth section 263 (i.e., the bottom surface of the fourth section 263 close to the third end 201) should be larger than the maximum outer diameter of the inflow channel 93 of the valve stent 9 after the third compression. The fifth section 264 is used to further compress the valve stent 9, and the axial length of this section is relatively long, while the fifth angle θ5 is relatively small, in order to easily compress the valve stent 9 from a larger diameter to a relatively smaller diameter, which can reduce the force applied by the operator and achieve a larger diameter change transition.

[0158] Preferably, the fourth angle θ4 is in the range of 25° to 30°, and the fifth angle θ5 is in the range of 10° to 20°. The special angle design of the fourth angle θ4 and the fifth angle θ5 allows the inner wall of the fifth section 264 of the second inner cavity to present a relatively slow and long compression path, which facilitates the gradual compression of the valve stent 9 and better ensures that the valve stent 9 is subjected to a gradual force during the compression and gripping process, thereby avoiding the valve stent 9 from having an irregular compression shape.

[0159] The inventor verified through experiments that when the loading tool of the implant provided in the fourth embodiment is used to compress the valve stent 9, the ears 91 can fit completely in the groove of the fixing part 30, all the ears 91 are tightly matched with the fixing head 55, and the stent compression and gripping shape is regular, which is more conducive to the balanced compression and gripping of the valve stent 9, so that the valve stent 9 can smoothly enter the sheath 56.

[0160] In summary, in the implant loading tool and medical device provided by the present invention, the implant loading tool includes a guide cover and a guide seat for detachably connecting with the guide cover; the guide seat is used to penetrate the guide cover along a first direction to perform a first compression on the implant; the guide seat is also used to detachably connect with the guide cover along a second direction opposite to the first direction to perform a second compression on the implant; wherein, when the guide seat is connected with the guide cover along the second direction, the guide seat is coaxial with the guide cover, and the guide seat is restricted in radial displacement and axial displacement relative to the guide cover. In such a configuration, the implant is first compressed by using the guide cover and the guide seat, and then the guide seat is reversed in direction and connected with the guide cover to perform a second compression on the implant. During the second compression, the guide seat and the guide cover are configured to be coaxial, and the guide seat is restricted in radial displacement and axial displacement relative to the guide cover. In this way, the guide seat is cleverly used to compress the implant twice, both forward and reverse, to simplify the structure of the loading tool, and to maintain the coaxiality of the guide seat and the guide cover during the second compression process, thereby ensuring that the implant is coaxially gripped during the second compression process and ensuring the straightness of the entire operation, thereby reducing the difficulty of the operator performing the second compression and making the entire gripping process more convenient and efficient.

[0161] The above description is only a description of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any changes or modifications made by a person skilled in the art in the field of the present invention based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A loading tool for an implant, It is characterized in that The invention comprises a guide cover and a guide seat for being detachably connected with the guide cover; the guide cover has a first end and a second end opposite to each other in the axial direction, the guide cover has a through first inner cavity, and the first inner cavity is gradually reduced in a step-like shape from the first end toward the second end; the guide cover is used to be connected to the guide seat in the direction from the second end toward the first end; the guide seat has a third end and a fourth end opposite to each other in the axial direction, the guide seat has a through second inner cavity, and the second inner cavity is gradually reduced in a shape from the third end toward the fourth end; The guide seat is used to penetrate the guide cover along a first direction from the third end toward the fourth end to perform a first compression on the implant; the guide seat is also used to be detachably connected to the guide cover along a second direction from the fourth end toward the third end to perform a second compression on the implant; Wherein, when the guide seat is connected to the guide cover along the second direction, the guide seat and the guide cover are coaxial, and the guide seat is restricted in radial displacement and axial displacement relative to the guide cover; The guide cover has a first buckle portion and a fourth buckle portion, and the guide seat has a second buckle portion, a fifth buckle portion and a third buckle portion; When the guide seat penetrates the guide cover along the first direction, the first buckle portion is engaged with the second buckle portion, limiting the radial displacement and axial displacement of the guide cover relative to the guide seat, so as to perform a first compression on the implant; after the first buckle portion is engaged with the second buckle portion, when the guide seat continues to penetrate the guide cover along the first direction, the fourth buckle portion is engaged with the fifth buckle portion, limiting the radial displacement, axial displacement and circumferential rotation of the guide cover relative to the guide seat, so as to perform a third compression on the implant; When the guide seat is detachably connected to the guide cover along the second direction, the first snap portion and / or the fourth snap portion engage with the third snap portion to limit the radial displacement and axial displacement of the guide cover relative to the guide seat, so as to perform a second compression on the implant.

2. The implant loading tool according to claim 1, It is characterized in that The first buckle portion includes more than two first buckles, the fourth buckle portion includes more than two second buckles, the guide cover has a plurality of grooves extending along the axial direction, and the grooves are open at the first end; the first buckle and the second buckle are respectively distributed along the circumference of the guide cover, and each of the first buckles is provided with the grooves on both sides of the circumference, and each of the second buckles is provided with the grooves on both sides of the circumference.

3. The implant loading tool according to claim 2, It is characterized in that The first buckle has a first engaging surface toward the second end and a first coupling surface toward the inside of the guide cover; the second buckle portion has a first inclined surface inclined inward toward the fourth end, a second engaging surface toward the third end, and a second coupling surface toward the outside of the guide seat; the first inclined surface is used to abut against the first coupling surface and push the free end of the first buckle to expand; the first coupling surface is used to abut against the second coupling surface to limit the radial displacement of the guide cover relative to the guide seat; the first engaging surface is used to abut against the second engaging surface to limit the axial displacement of the guide cover relative to the guide seat in the direction toward the second end.

4. The implant loading tool according to claim 3, It is characterized in that The third snap-in portion includes a snap-in groove, the shape of the snap-in groove along the axial section of the guide seat is adapted to the shape of the first snap-in along the axial section of the guide cover; the first snap-in is used to snap into the snap-in groove to limit the radial displacement and axial displacement of the guide seat relative to the guide cover.

5. The implant loading tool according to claim 4, It is characterized in that There is a spacing area between two adjacent buckle grooves, and the circumferential length of the spacing area is not less than the circumferential length of the first buckle along the guide cover, and the spacing area is used for the first buckle to extend toward the fourth end; the first buckle is used to engage in the buckle groove in a circumferential manner through the circumferential relative rotation of the guide cover and the guide seat.

6. The implant loading tool according to claim 5, It is characterized in that The side wall of the buckle groove facing the inner part of the guide seat gradually expands outwards towards the third end.

7. The implant loading tool according to claim 2, It is characterized in that The second buckle has a second inclined surface facing the outside of the guide cover and a third engaging surface facing the second end direction; the second inclined surface is inclined inwardly toward the first end direction; the fifth buckle portion has a fourth engaging surface facing the fourth end direction, a first limiting surface facing the inside of the guide seat, and two second limiting surfaces arranged opposite to each other along the circumference of the guide seat; the first limiting surface is used to abut against the second inclined surface to push the free end of the second buckle to retract toward the inside of the guide cover; the first limiting surface is used to abut against the outer side wall of the guide cover to limit the radial displacement of the guide cover relative to the guide seat; The third engaging surface is used to abut against the fourth engaging surface to limit the axial displacement of the guide cover relative to the guide seat in a direction toward the second end; The second limiting surface is used to abut against the radial side wall of the second buckle to limit the circumferential rotation of the guide cover relative to the guide seat.

8. The implant loading tool according to any one of claims 1 to 7, It is characterized in that A maximum axial distance between the first buckle portion and the second end is not less than a maximum axial distance between the fourth buckle portion and the second end.

9. The implant loading tool according to claim 7, It is characterized in that The third snap-fit ​​portion includes a snap-fit ​​plate arranged along the axial direction of the guide seat, the snap-fit ​​plate has a snap-fit ​​hole arranged along the axial direction of the guide seat, the second snap is used to snap into the snap-fit ​​hole, and the third snap-fit ​​surface is used to abut against a side of the snap-fit ​​plate facing the fourth end to limit the radial displacement and axial displacement of the guide seat relative to the guide cover.

10. The implant loading tool according to claim 1, It is characterized in that The guide cover has a sixth buckle portion, and the guide seat has a third buckle portion; When the guide seat is detachably connected to the guide cover along the second direction, the sixth buckle portion is engaged with the third buckle portion to limit the radial displacement and axial displacement of the guide cover relative to the guide seat.

11. The implant loading tool according to claim 10, It is characterized in that The sixth buckle portion includes more than two third buckles, the guide cover has a plurality of axially extending grooves, and the grooves are open at the first end; the third buckles are distributed circumferentially along the guide cover, and each of the third buckles is provided with the grooves on both sides of the circumference; the third buckle has a third inclined surface facing the outside of the guide cover and a fifth locking surface facing the second end; the third inclined surface is inclined inwardly toward the first end.

12. The implant loading tool according to claim 11, It is characterized in that The third snap-fit ​​portion includes a snap-fit ​​plate arranged along the axial direction of the guide seat, the snap-fit ​​plate has a snap-fit ​​hole arranged along the axial direction of the guide seat, the third snap is used to snap into the snap-fit ​​hole, and the fifth snap-fit ​​surface is used to abut against a side of the snap-fit ​​plate facing the fourth end to limit the radial displacement and axial displacement of the guide seat relative to the guide cover.

13. The implant loading tool according to claim 1, It is characterized in that The loading tool of the implant also includes a fixing member, which has an inner hole that penetrates axially, and is used to be detachably connected to the second end; when the fixing member is connected to the second end, the inner hole is coaxial with the guide cover, and the fixing member is restricted in radial displacement and axial displacement relative to the guide cover.

14. A loading tool for an implant according to claim 13, It is characterized in that The fixing member is connected to the guide cover via a thread, a buckle or a pin.

15. The implant loading tool according to claim 13, It is characterized in that The implant loading tool also includes a protection tube, which is used to be detachably inserted into the inner hole; when the protection tube is connected to the fixing member, the protection tube is coaxial with the inner hole, and the protection tube is restricted in radial displacement and axial displacement relative to the fixing member.

16. The implant loading tool according to claim 15, It is characterized in that The inner diameter of the inner hole is matched with the outer diameter of the protection tube. The protection tube is used to pass through the inner hole and is restricted by the inner hole in radial displacement relative to the fixing member.

17. The implant loading tool according to claim 15, It is characterized in that The protective tube has a fifth end and a sixth end opposite to each other in the axial direction, and the protective tube is used to be connected to the fixing member with the sixth end in the direction toward the fifth end; the fixing member has a seventh end and an eighth end opposite to each other in the axial direction, and the protective tube is used to be connected to the protective tube with the eighth end in the direction toward the seventh end; the protective tube has a third limiting surface toward the sixth end; the fixing member has a fourth limiting surface toward the seventh end, and the third limiting surface is used to abut against the fourth limiting surface to limit the axial displacement of the protective tube toward the sixth end relative to the fixing member.

18. A medical device, It is characterized in that A loading tool for an implant as claimed in any one of claims 1 to 17, further comprising a conveying device, wherein the loading tool is used to cooperate with the conveying device to load an implant into the conveying device.

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