A fixator for a cardiac implantable device and its installation tool

Abstract

This invention discloses a fixator for a cardiac implantation device, comprising: an implantation part, including a limiting area and a connecting area, the implantation part passing through cardiac tissue, the limiting area abutting the inner side of the cardiac tissue, and the connecting area extending out of the cardiac tissue and having a plurality of first buckles arranged circumferentially thereon; and a locking part, including an integrally structured sealing disc and a fixing ring, the sealing disc surrounding the outer wall of the fixing ring, the locking part being located on the outer side of the cardiac tissue, the sealing disc abutting the cardiac tissue from the outer side, a fixing groove being provided on the inner wall of the locking part, the connecting area being embedded in the inner ring of the fixing ring, and the plurality of first buckles engaging with the fixing groove to clamp and fix the implantation part and the locking part to the inner and outer sides of the cardiac tissue. This invention designs the fixator as a separate implantation part and locking part, allowing installation from the inner and outer sides of the cardiac tissue. Through inner limiting and outer abutting engagement, the implantation part and locking part are clamped and fixed to the cardiac tissue without the need for sutures, making operation convenient and efficient.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a fixator for cardiac implantation devices and its installation tool. Background Technology

[0002] Heart failure, or HF for short, is simply the inability of the heart to pump enough blood to maintain the circulation of blood throughout the body. According to statistics from the World Health Organization, approximately 15% to 20% of people suffer from varying degrees of heart failure. For heart failure patients, there are currently only three treatment options: conservative drug therapy, heart transplantation, and cardiac assistive therapy. Among these, drug therapy has relatively poor efficacy, and heart transplantation is extremely difficult due to the limited availability of donors. Therefore, cardiac assistive therapy is recognized worldwide as the most effective treatment for various types of end-stage heart failure. Cardiac assistive therapy requires implanting a device into the heart using a fixator. Therefore, the safety and reliability of the fixator have a significant impact on the success of cardiac assistive therapy surgery. Currently, cardiac assistive therapy surgery uses surgical sutures to install the fixator into the heart. However, this surgical method is cumbersome and difficult, requiring a high level of surgical skill. The suturing process is also prone to new bleeding points, increasing the difficulty of the surgery. In addition, the surgical suture process is time-consuming, and it also requires the patient to be physically fit to support the surgery.

[0003] Therefore, how to reduce the operational difficulty of cardiac adjuvant therapy surgery, improve surgical efficiency, and reduce the surgical risk for patients is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a fixator for cardiac implantation devices, which reduces the operational difficulty of cardiac assistive therapy surgery, improves surgical efficiency, and reduces the surgical risk for patients.

[0005] Another object of the present invention is to provide an installation tool for installing the above-mentioned fixator on cardiac tissue.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A fixator for a cardiac implantable device, comprising:

[0008] The implantation part includes a limiting area and a connecting area. The implantation part is disposed through the heart tissue. The limiting area abuts against the inner side of the heart tissue. The connecting area has a cylindrical configuration and extends out of the heart tissue. The connecting area is provided with a plurality of first buckles in its circumferential direction. The first buckles protrude in a direction away from the axis of the connecting area.

[0009] The locking part includes a sealing disc and a fixing ring of one integrated structure. The sealing disc is arranged around the outer wall of the fixing ring. The locking part is located on the outer side of the heart tissue. The sealing disc abuts against the heart tissue from the outer side of the heart. The inner wall of the fixing ring is provided with a fixing groove that engages with the first buckle. The connecting area is embedded in the inner ring of the fixing ring. A plurality of the first buckles are inserted into the fixing groove to lock the implant and the locking part to the inner and outer sides of the heart tissue.

[0010] Preferably, in the fixator for the cardiac implantation device described above, the inner wall of the fixation ring is stepped and includes an annular limiting segment, the limiting segment being used to abut and limit one end of the connection area away from the limiting area, and the inner diameter of the limiting segment being smaller than the inner diameter of the fixation groove.

[0011] Preferably, in the fixation device for the cardiac implantation device described above, the fixation ring further includes an annular docking section, which docks with the end of the limiting section. When the connecting area is abutted by the limiting section, the inner wall of the connecting area docks with the inner wall of the docking section, and the inner diameter of the connecting area is the same as the inner diameter of the docking section.

[0012] Preferably, in the fixator for the cardiac implantation device described above, four first buckles are evenly arranged circumferentially along the connection area.

[0013] Preferably, in the fixator for the cardiac implantation device described above, the limiting region is an umbrella-shaped structure composed of a plurality of limiting plates, and the plurality of limiting plates are evenly arranged at the end of the connecting region along the circumference of the connecting region.

[0014] Preferably, in the above-mentioned fixation device for cardiac implantation, the connecting area is provided with a plurality of second buckles for connecting the cardiac implantation device in its circumferential direction, and the second buckles protrude in the direction toward the axis of the connecting area.

[0015] Preferably, in the fixator for the cardiac implantation device described above, the sealing disc has a structure with a recessed central region in its axial direction.

[0016] An installation tool is provided for installing a fixator for a cardiac implantable device according to any of the above embodiments, the installation tool comprising:

[0017] The outer shell is cylindrical, with a threaded inner wall and flanges at both ends.

[0018] A push rod is threaded to the inner wall of the housing and passes through the housing; the first end of the push rod has a pointed conical structure.

[0019] The gripping head includes a slider and a cover plate. The cover plate is installed on a flange structure at one end of the housing by screws. Several sliders are fully embedded in the cover plate along its circumference. A spring is sleeved on the protrusion of the slider. When the first end of the push rod moves along the axial direction of the housing, it passes through the housing and pushes the slider to lift the slider out of the outer wall surface of the cover plate.

[0020] The side wall of the connecting area is provided with square holes corresponding to the sliders. The gripping head extends into the connecting area, and when the slider is lifted and protrudes from the outer wall of the cover plate, it engages with the square holes one by one.

[0021] Preferably, in the above-mentioned installation tool, the second end of the push rod is a knob structure that extends out of the housing, and a rear cover is sleeved on the outer side of the second end of the push rod, and the rear cover is threadedly connected to the end of the housing.

[0022] Preferably, in the above-mentioned installation tool, the outer wall of the back cover is provided with anti-slip texture.

[0023] As can be seen from the above technical solution, the fixator for cardiac implantation devices provided by the present invention includes an implantation part and a locking part, which clamp and fix the cardiac tissue from both sides of the cardiac incision and allow the cardiac implantation device to pass through. Specifically, the implantation part includes a limiting area and a connecting area. The implantation part passes through the cardiac tissue, specifically the limiting area located at the end of the connecting area abuts against the inner side of the cardiac tissue, while the connecting area extends out of the cardiac tissue. The connecting area has a cylindrical configuration so that the cardiac implantation device can be installed through the inside of the cylinder. At the same time, the connecting area has a plurality of first buckles on its circumferential sidewalls. The connecting area is connected to the locking part through the first buckles. Therefore, the protrusion direction of the first buckles is along the axis away from the connecting area to avoid affecting the internal cavity space of the cylinder of the connecting area and to provide good insertion space for the cardiac implantation device. The locking part specifically includes a sealing disc and a fixing ring with an integral metal structure to ensure connection strength and rigidity. The sealing disc is made of rigid material and is arranged around the outer wall of the fixing ring. The locking part as a whole The device is positioned on the outer side of the heart tissue and uses an expanding rigid sealing disc to provide good contact with the heart tissue from the outside. A fixing groove is provided on the inner wall of the fixing ring, which is an indentation that engages with the first snap-fit ​​of the protruding structure. The connecting area that extends through the heart tissue is embedded in the inner ring of the fixing ring. Simultaneously, several first snap-fits engage with the fixing groove to connect the implant and locking parts into a single structure. The limiting area and sealing disc press the heart tissue from both the inside and outside to ensure stable placement of the fixator. When installing this structure on the heart tissue, simply insert the implant into the heart and extend its connecting area through the heart tissue. Then, place the fixing ring of the locking part onto the outer wall of the connecting area's cylinder outside the heart. Pushing the locking part causes the first snap-fit ​​to engage with the fixing groove. The limiting effect of the limiting area and sealing disc ensures the fixator is stably positioned on the heart tissue. The channel between the connecting area and the inner ring of the fixing ring allows for convenient insertion and installation of cardiac implantation devices. The fixator setup is simple and quick, improving surgical efficiency.The fixator for cardiac implantation devices provided by this invention is designed as a split structure to reduce the difficulty of installation on cardiac tissue. During surgery, the surgeon can first separate the fixator, then implant the implant into the heart. The limiting area of ​​the implant abuts against the heart tissue from the inside, while the connecting area extends out of the heart tissue. Correspondingly, the sealing disc of the locking part abuts against the heart tissue from the outside through cooperation with the limiting area. The fixing ring in the locking part is fitted onto the outer wall of the connecting area and is fixed by a fixing groove and a first buckle in the circumferential direction of the connecting area, so that the implant and the locking part are connected as a whole structure, achieving stable installation of the fixator on the cardiac tissue. At the same time, the inner channel of the connecting area and the fixing ring allows for convenient insertion and installation of the cardiac implantation device. Compared with the fixation of existing technologies, the fixator for cardiac implantation devices provided by this invention eliminates the need for surgical sutures, making the operation simple and quick, avoiding secondary damage to the patient caused by the suturing process, and reducing surgical risks. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of an explosion of the fixator for a cardiac implantation device provided in an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the fixation structure for a cardiac implantation device provided in an embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the implantation site structure provided in an embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of the locking part structure provided in an embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram of the installation tool structure provided in an embodiment of the present invention;

[0030] Among them, 10 is the implantation part, 110 is the limiting area, 1110 is the limiting piece, 120 is the connecting area, 1210 is the first buckle, 1220 is the second buckle, 1230 is the square hole, 20 is the locking part, 210 is the sealing plate, 220 is the fixing ring, 2210 is the fixing groove, 2220 is the limiting section, 2230 is the docking section, and 30 is the heart tissue;

[0031] 410 is the outer shell, 420 is the push rod, 430 is the gripping head, 4310 is the slider, 4320 is the cover plate, 4330 is the spring piece, and 440 is the back cover. Detailed Implementation

[0032] The core of this invention is to disclose a fixator for cardiac implantation devices, which reduces the operational difficulty of cardiac assistive therapy surgery, improves surgical efficiency, and reduces the surgical risk for patients.

[0033] Another key aspect of this invention is to provide an installation tool for mounting the aforementioned fixator on cardiac tissue.

[0034] To enable those skilled in the art to better understand the present invention, embodiments of the present invention will be described below with reference to the accompanying drawings. Furthermore, the embodiments shown below do not limit the scope of the invention as described in the claims. Additionally, the complete contents of the configurations shown in the embodiments below are not limited to those necessary for the solution of the invention described in the claims.

[0035] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the fixator for a cardiac implantation device provided in this embodiment of the invention includes an implantation part 10 and a locking part 20 to clamp and fix the cardiac tissue 30 from both sides of the cardiac incision and to allow the cardiac implantation device to pass through. Specifically, the implantation part 10 includes a limiting area 110 and a connecting area 120. The implantation part 10 passes through the cardiac tissue 30. Specifically, the limiting area 110 located at the end of the connecting area 120 abuts against the inner side of the cardiac tissue 30, while the connecting area 120 extends out of the cardiac tissue 30. The connecting area 120 has a cylindrical configuration so that the cardiac implantation device can be installed through the inside of the cylinder. At the same time, the connecting area 120 is provided with a plurality of first buckles 1210 on its circumferential sidewall. The connecting area 120 is connected to the locking part 20 through the first buckles 1210. Therefore, the protrusion direction of the first buckles 1210 is along the direction away from the axis of the connecting area 120 to avoid affecting the internal cavity space of the cylindrical connecting area 120 and to provide a good insertion space for the cardiac implantation device.

[0036] The locking part 20 specifically includes a sealing disc 210 and a fixing ring 220 with an integrated metal structure to ensure connection strength and rigidity requirements. The sealing disc 210 is made of rigid material and is arranged around the outer wall of the fixing ring 220. The locking part 20 is set on the outside of the heart tissue 30 and provides good abutment to the heart tissue 30 from the outside of the heart through the expanding rigid sealing disc 210. The inner wall of the fixing ring 220 is provided with a fixing groove 2210. The fixing groove 2210 is an inner groove that engages with the first buckle 1210 of the protruding structure. The connecting area 120 of the heart tissue 30 is inserted into the inner ring of the fixing ring 220. At the same time, several first buckles 1210 engage with the fixing groove 2210 to connect the implant 10 and the locking part 20 into an integrated structure. The limiting area 110 and the sealing disc 210 press the heart tissue 30 from the inside and outside to make the fixator stably set.

[0037] When the above structure is fixed on the heart tissue 30, it is only necessary to first implant the implant 10 into the heart and pass its connecting area 120 through the heart tissue 30. Outside the heart, the fixing ring 220 of the locking part 20 is sleeved on the outer wall of the cylindrical body of the connecting area 120. The locking part 20 is pushed so that the first buckle 1210 is engaged and fixed with the fixing groove 2210. With the limiting effect of the limiting area 110 and the sealing plate 210, the fixator can be stably positioned on the heart tissue 30. At the same time, the inner ring channel of the connecting area 120 and the fixing ring 220 allows the heart implantation device to be easily inserted and installed. The fixator is simple and quick to set up, improving the efficiency of the operation.

[0038] The fixator for cardiac implantation devices provided in this embodiment of the invention is designed as a split structure to reduce the difficulty of installation on the cardiac tissue 30. During the operation, the surgeon can first separate the fixator, then implant the implant part 10 into the heart. The limiting area 110 of the implant part 10 abuts against the inside of the cardiac tissue 30, while the connecting area 120 extends out of the cardiac tissue 30. Correspondingly, the sealing disc 210 of the locking part 20 abuts against the cardiac tissue 30 from the outside of the heart through cooperation with the limiting area 110. The fixing ring 220 in the locking part 20 is sleeved on the connecting area 110. The outer wall of the implant 10 is fixed by engaging with the first buckle 1210 in the circumferential direction of the connecting area 120 through the fixing groove 2210, so that the implant 10 and the locking part 20 are connected as an integral structure, realizing the stable setting of the fixator on the heart tissue 30. At the same time, the inner ring channel of the connecting area 120 and the fixing ring 220 allows for convenient insertion and installation of the cardiac implantation device. Compared with the setting of the fixator on the heart tissue 30 in the embodiment of the present invention, the fixator for cardiac implantation device provided by the present invention does not require surgical suture operation, the operation is simple and quick, avoids secondary damage to the patient caused by the suturing process of the surgeon, and reduces the surgical risk.

[0039] Furthermore, since the connecting area 120 is a structure that is inserted into and connected to the fixing ring 220, in order to improve the accuracy of the insertion of the connecting area 120 and the fixing ring 220, in a specific embodiment of the present invention, the inner wall of the fixing ring 220 is stepped, and the fixing ring 220 includes a ring-shaped limiting segment 2220. The limiting segment 2220 is used to abut against a section of the connecting area 120 away from the limiting area 110. That is, when the connecting area 120 is inserted into the fixing ring 220, the end of the connecting area 120 will abut against the limiting segment 2220 so that the connecting area 120 reaches the position required for installation. Similarly, when the end of the connecting area 120 abuts against the limiting segment 2220, the first buckle 1210 is engaged in the fixing groove 2210 to complete the connection between the connecting area 120 and the fixing ring 220.

[0040] It should be noted that the stepped configuration of the inner wall of the fixing ring 220, i.e., the inner diameter of the limiting segment 2220 is smaller than the inner diameter of the fixing groove 2210, so that the limiting segment 2220 can meet the purpose of abutting the end of the connecting area 120. At the same time, the limiting segment 2220 is located further away from the heart tissue 30 than the fixing groove 2210.

[0041] It should be further explained that a guide area sloping towards the fixing groove 2210 is preferably provided between the fixing groove 2210 and the limiting section 2220, so that when the connecting area 120 and the fixing ring 220 are not properly inserted, the end of the connecting area 120 is stably guided to the limiting section 2220 through the guide area, and the central axis of the connecting area 120 and the fixing ring 220 are collinearly aligned.

[0042] Based on the above embodiments, the fixing ring 220 preferably further includes an annular docking section 2230. The docking section 2230 is arranged adjacent to the limiting section 2220 and docked at its ends. The docking section 2230 is located further away from the heart tissue 30 than the limiting section 2220. When the connecting area 120 is abutted by the limiting section 2220, the inner wall of the connecting area 120 docks with the inner wall of the docking section 2230 to form a complete cylindrical wall surface. The inner diameter of the connecting area 120 is the same as the inner diameter of the docking section 2230. The connection end is provided to provide pre-alignment space for the heart implantation device when it is inserted and installed, so as to avoid the heart implantation device directly contacting the connecting area 120 and causing the implantation part 10 to be pushed away from the heart tissue 30.

[0043] Furthermore, in a specific embodiment of the present invention, four first buckles 1210 are provided in the circumferential direction of the connection area 120, and the four first buckles 1210 are evenly arranged in the circumferential direction of the connection area 120 so that each first buckle 1210 is subjected to uniform force, and the four first buckles 1210 lock from four directions to ensure the stability of the connection.

[0044] Furthermore, in a specific embodiment of the present invention, the limiting region 110 is an umbrella-shaped structure composed of a plurality of limiting pieces 1110, and the plurality of limiting pieces 1110 are evenly arranged at the end of the connecting region 120 along the circumference of the connecting region 120 to maintain the stability of the limiting effect. After the limiting region 110 is implanted into the heart, the surgeon can conveniently perform the abutment action from the inside of the heart tissue 30 by opening the plurality of limiting pieces 1110 in sequence.

[0045] Furthermore, in a specific embodiment of the present invention, the connecting area 120 is provided with a plurality of second buckles 1220 in its circumferential direction. The second buckles 1220 protrude in the direction toward the axis of the connecting area 120, that is, protrude into the connecting area 120, for connecting the cardiac implantation device. The snap-fit ​​structure makes the installation process of the cardiac implantation device equally convenient and efficient, improving surgical efficiency.

[0046] Furthermore, in a specific embodiment of the present invention, the sealing disc 210 has a structure with a recessed middle region in its axial direction, that is, the two ends of the sealing disc 210 are expansion structures, one end of which is used to abut against the outer wall of the heart tissue 30, and the other end can be used to abut against other tissue structures. At the same time, the recessed structural area in the middle can be used to snap on the auxiliary components required to fix the heart.

[0047] like Figure 5As shown, the present invention also provides an installation tool for installing the fixator for the cardiac implantation device provided in any of the above embodiments onto the cardiac tissue 30. Specifically, the installation tool is used to implant the implantation part 10 into a suitable position on the cardiac tissue 30. The installation tool includes a housing 410, a push rod 420, and a gripping head 430. The housing 410 is a cylindrical load-bearing and protective component with a threaded inner wall and flanged ends. The push rod 420 includes a partial screw structure for threaded connection with the inner wall of the housing 410. The push rod 420 passes through the inner cavity of the housing 410. The first end of the push rod 420 has a pointed conical structure. The gripping head 430 includes a slider 4310 and a cover plate 4320. The cover plate 4320 is stably installed on the flange structure at one end of the housing 410 by screws. Several sliders 4310 are fully embedded in the cover plate 4320 along its circumference. The sliders 4310 are provided with bosses, and spring pieces 4330 are sleeved on the bosses. The spring pieces 4330 are fixed at both ends. When the push rod 420 is pushed, it moves along the axial direction of the housing 410. At the same time, the first end of the push rod 420 moves along the axial direction of the housing 410. A section extends through the outer shell 410 and into the cover plate 4320. The slider 4310 on the circumferential direction of the cover plate 4320 is lifted and protrudes from the outer wall surface of the cover plate 4320. When the first end of the push rod 420 leaves the cover plate 4320, the slider 4310 will be completely re-embedded into the cover plate 4320 due to the elastic action of the spring piece 4330. Correspondingly, in the fixator for the cardiac implantation device provided in this embodiment of the invention, square holes 1230 corresponding one-to-one with the slider 4310 are provided on the side wall of the connecting area 120. It should be noted that "one-to-one correspondence" here refers to the square holes 1230. The number and circumferential position of 230 correspond to the slider 4310. After the gripping head 430 extends into the connecting area 120, the push rod 420 is driven so that its first end extends into the cover plate 4320. When the slider 4310 is lifted and protrudes from the outer wall of the cover plate 4320, it will be locked in place with the square hole 1230. The surgeon can then control the movement of the implant 10 and other operations through the installation tool. After the position setting of the implant 10 is completed, the first end of the push rod 420 is driven away from the cover plate 4320, and the installation tool and the implant 10 can be unlocked and the installation tool can be removed.

[0048] Furthermore, based on the above embodiment, the second end of the push rod 420 is a knob structure extending out of the outer shell 410. The operator can drive the push rod 420 to rotate by turning the knob. At the same time, a back cover 440 is sleeved on the outer side of the second end of the push rod 420. The back cover 440 is threadedly connected to the end of the outer shell 410. The knob structure is embedded in the back cover 440 to protect the knob structure and prevent the knob structure from being damaged or accidentally operated. When it is necessary to operate the knob structure, the back cover 440 can be unscrewed from the outer shell 410.

[0049] To further optimize the above technical solution, the outer wall of the back cover 440 provided in this embodiment of the invention is provided with anti-slip texture, so that the surgeon can easily install or remove the back cover 440 on the outer shell 410.

[0050] The terms "first" and "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units may include steps or units not listed, but rather steps or units not listed.

[0051] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A fixator for a cardiac implantable device, characterized in that, include: The implant (10) includes a limiting area (110) and a connecting area (120). The implant (10) is disposed through the heart tissue (30). The limiting area (110) abuts against the inner side of the heart tissue (30). The connecting area (120) has a cylindrical configuration and extends out of the heart tissue (30). The connecting area (120) is provided with a plurality of first buckles (1210) in its circumferential direction. The first buckles (1210) protrude in a direction away from the axis of the connecting area (120). The locking part (20) includes an integral sealing disc (210) and a fixing ring (220). The sealing disc (210) is arranged around the outer wall of the fixing ring (220). The locking part (20) is located on the outer side of the heart tissue (30). The sealing disc (210) abuts against the heart tissue (30) from the outer side of the heart. The inner wall of the fixing ring (220) is provided with a fixing groove (2210) that engages with the first buckle (1210). The connecting area (120) is embedded in the inner ring of the fixing ring (220). A plurality of the first buckles (1210) are inserted into the fixing groove (2210) to clamp and fix the implant (10) and the locking part (20) to the inner and outer sides of the heart tissue (30). The connection area (120) is provided with a plurality of second latches (1220) for connecting cardiac implantation devices in its circumferential direction, and the second latches (1220) protrude in the direction toward the axis of the connection area (120).

2. The fixator for a cardiac implantable device as described in claim 1, characterized in that, The inner wall of the fixing ring (220) is stepped and includes an annular limiting segment (2220). The limiting segment (2220) is used to abut and limit the end of the connecting area (120) away from the limiting area (110). The inner diameter of the limiting segment (2220) is smaller than the inner diameter of the fixing groove (2210).

3. The fixator for a cardiac implantable device as described in claim 2, characterized in that, The fixing ring (220) further includes an annular docking section (2230), which docks with the end of the limiting section (2220). When the connecting area (120) is abutted by the limiting section (2220), the inner wall of the connecting area (120) docks with the inner wall of the docking section (2230), and the inner diameter of the connecting area (120) is the same as the inner diameter of the docking section (2230).

4. The fixator for a cardiac implantable device as described in claim 1, characterized in that, The four first buckles (1210) are evenly arranged along the circumference of the connecting area (120).

5. The fixator for a cardiac implantable device as described in claim 1, characterized in that, The limiting area (110) is an umbrella-shaped structure composed of several limiting pieces (1110), and the several limiting pieces (1110) are evenly arranged at the end of the connecting area (120) along the circumference of the connecting area (120).

6. The fixator for a cardiac implantable device as described in claim 1, characterized in that, The sealing disc (210) has a structure with a recessed middle region in its axial direction.

7. An installation tool, characterized in that, Suitable for installing a fixator for a cardiac implantable device as described in any one of claims 1-6, the installation tool comprising: The outer shell (410) is cylindrical in shape, and the inner wall of the outer shell (410) is threaded, and the two ends are flanges. A push rod (420) is threaded to the inner wall of the housing (410) and passes through the housing (410). The first end of the push rod (420) is a pointed cone structure. The gripping head (430) includes a slider (4310) and a cover plate (4320). The cover plate (4320) is installed on a flange structure at one end of the housing (410) by screws. A plurality of sliders (4310) are fully embedded in the cover plate (4320) along the circumference. A spring piece (4330) is sleeved on the protrusion of the slider (4310). When the first end of the push rod (420) moves along the axial direction of the housing (410), it passes through the housing (410) and pushes the slider (4310) to lift the slider (4310) and protrude from the outer wall surface of the cover plate (4320). The side wall of the connecting area (120) is provided with square holes (1230) that correspond one-to-one with the slider (4310). The gripping head (430) extends into the connecting area (120). When the slider (4310) is lifted and protrudes from the outer wall of the cover plate (4320), it engages with the square holes (1230) one-to-one.

8. The installation tool as described in claim 7, characterized in that, The second end of the push rod (420) is a knob structure that extends out of the outer shell (410). A back cover (440) is sleeved on the outer side of the second end of the push rod (420), and the back cover (440) is threadedly connected to the end of the outer shell (410).

9. The installation tool as described in claim 8, characterized in that, The outer wall of the back cover (440) is provided with anti-slip texture.

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