Compression mechanism

Abstract

The utility model relates to the technical field of medical equipment, and discloses a compression mechanism which comprises a first component and a second component. The second part is rotationally arranged in the first part; the compression components are arranged on the first component and the second component in a sliding mode respectively, and when the second component rotates relative to the first component, the compression components move in the radial direction; the compression part comprises a first sliding block and a second sliding block, the first sliding block and the second sliding block are each provided with a contact part making contact with the expandable implant, and the contact part of the first sliding block is inserted into the contact part of the second sliding block. According to the utility model, the number of contact points between each compression component and the expandable implant is changed from original four to three, so that the contact area between the compression component and the expandable implant is reduced, the affected range of the expandable implant is reduced, the damaged area of the expandable implant is reduced, and the service life of the expandable implant is prolonged. And the damage to the expandable implant in the compression process can be effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of medical equipment technology, specifically to a compression mechanism. Background Technology

[0002] In heart valve surgery, especially when implanting an artificial heart valve, a heart valve compression mechanism is used to compress the heart valve to a smaller size so that it can be delivered through a catheter.

[0003] When a heart valve compression mechanism squeezes the heart valve, it can damage the bioprosthetic leaflets to some extent. Current heart valve compression mechanisms have an excessively wide contact area with the heart valve, leading to significant damage to the bioprosthetic leaflets and potentially causing valvular insufficiency and failure. Utility Model Content

[0004] In view of this, the present invention provides a compression mechanism to solve the problem of large damage area of ​​the bioprosthetic leaflets of the heart valve when the current heart valve compression mechanism squeezes the heart valve.

[0005] This utility model also provides a compression mechanism, including:

[0006] First component;

[0007] The second component is rotatably disposed inside the first component;

[0008] Multiple compression components are provided, each of which is slidably disposed on the first component and the second component. When the second component rotates relative to the first component, each of the compression components moves radially.

[0009] The compression component includes a first slider and a second slider, both of which have a contact portion that contacts the expandable implant. The contact portion of the first slider is provided with one portion that is inserted into the interior of the contact portion of the second slider.

[0010] The beneficial effects of the above compression mechanism are as follows:

[0011] The aforementioned compression mechanism is simple to operate. The number of contact points between each compression component and the expandable implant has been reduced from four to three, which reduces the contact area between the compression component and the expandable implant, reduces the affected area of ​​the expandable implant, and reduces the damaged area of ​​the expandable implant. This can effectively reduce damage to the expandable implant during compression and prevent the phenomenon of incomplete closure of the expandable implant.

[0012] In one alternative implementation, the first slider includes:

[0013] First sliding part;

[0014] The first contact portion is connected to the first sliding portion, and the side of the first contact portion closest to the central axis of the first component is the first contact position.

[0015] In one alternative implementation, the second slider includes:

[0016] Second sliding part;

[0017] The second contact portion is connected to the second sliding portion. The second contact portion has an insertion hole. The side of the second contact portion near the central axis of the first component has two second contact positions, which are located on both sides of the insertion hole.

[0018] In the above technical solution, when the first contact part contacts the expandable implant, there is only one first contact position, thereby reducing the number of contact points between each compression component and the expandable implant.

[0019] In one alternative embodiment, the first contact portion is movably inserted into the insertion hole. When the compression component expands or contracts, the insertion hole on the second contact portion provides a movement channel for the first contact portion, preventing the first contact portion from deflecting during expansion or contraction.

[0020] In one alternative embodiment, the axial length of the first contact point along the first component is less than the sum of the axial lengths of the two second contact points along the first component.

[0021] The above technical solution reduces the axial length of the first contact point along the first component, thereby reducing the contact area between the compression component and the expandable implant, decreasing the affected area of ​​the expandable implant, and thus achieving the goal of reducing the damaged area of ​​the expandable implant. The smaller first contact point and the two larger second contact points contact the expandable implant in an alternating manner, which, while reducing the damaged area of ​​the expandable implant, also ensures the stability and reliability of the contact.

[0022] In one alternative embodiment, the first contact portion has an axial length of 1 to 3 mm along the first component.

[0023] In one alternative embodiment, the second contact portion has an axial length of 3 to 5 mm along the first component.

[0024] The above technical solution can precisely control the contact area between the first and second sliders and the expandable implant, reducing wear and damage to the expandable implant. The specific length design of the first and second contact parts can ensure the uniform distribution of contact points during the compression process, avoiding local over-compression or under-compression.

[0025] In one alternative embodiment, the first contact portion of the compression component is further inserted into the insertion hole of the second contact portion of the next compression component.

[0026] In the above technical solution, the first contact part is inserted into the socket of the second contact part, forming a mechanical locking mechanism that enhances the connection stability between the two parts. This design can effectively reduce loosening caused by vibration or external force during use, ensuring the reliability and stability of the compression component during operation.

[0027] In one alternative embodiment, the first contact portion of the compression component is further inserted into the insertion hole of the second contact portion of the next compression component.

[0028] In one optional embodiment, the first component has a plurality of sliding holes radially provided, and the second component has a plurality of arc-shaped holes circumferentially provided;

[0029] The first sliding part is slidably disposed in the sliding hole, and a first locking member is provided on the first sliding part, the first locking member passing through the arc-shaped hole;

[0030] The second sliding part is slidably disposed in the sliding hole, and a second locking member is provided on the second sliding part, the second locking member passing through the arc-shaped hole. Attached Figure Description

[0031] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of an existing compression mechanism;

[0033] Figure 2 A schematic diagram of the structure of a compression mechanism in the open state provided by this utility model;

[0034] Figure 3 A schematic diagram of the structure of the compression mechanism in the closed state provided by this utility model;

[0035] Figure 4 A front view of a compression mechanism in the open state provided by this utility model;

[0036] Figure 5 A front view of a compression mechanism in a closed state provided by this utility model;

[0037] Figure 6 A front view of the first slider in a compression mechanism provided by this utility model;

[0038] Figure 7 A side view of the first slider in a compression mechanism provided by this utility model;

[0039] Figure 8 A front view of the second slider in a compression mechanism provided by this utility model;

[0040] Figure 9 A side view of the second slider in a compression mechanism provided by this utility model;

[0041] Figure 10 This is a schematic diagram of the structure of a compression mechanism provided by this utility model in practical application.

[0042] Explanation of reference numerals in the attached figures:

[0043] 1. First component; 11. First gripping part; 12. Rotating part;

[0044] 2. Second component; 21. Second gripping part; 22. Fixing part; 23. Sliding hole;

[0045] 3. Compression component; 31. First slider; 311. First sliding part; 312. First contact part; 313. First contact position; 32. Second slider; 321. Second sliding part; 322. Second contact part; 323. Insertion hole; 324. Second contact position; 33. First locking member; 34. Second locking member.

[0046] 4. Center hole;

[0047] 5. Third locking component. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0049] In heart valve surgery, especially when implanting an artificial heart valve, a heart valve compression mechanism is used to compress the heart valve to a smaller size so that it can be delivered through a catheter.

[0050] When a heart valve compression mechanism squeezes the heart valve, it can damage the bioprosthetic leaflets to some extent. Current heart valve compression mechanisms have an excessively wide contact area with the heart valve, leading to significant damage to the bioprosthetic leaflets. This can cause valvular insufficiency and failure, ultimately affecting surgical outcomes and the patient's long-term health.

[0051] The applicant's earlier Chinese utility model patent, with authorization announcement number CN208808759U, discloses a radial gripping mechanism, combined with Figure 1 As shown, both the sliding component one and the sliding component two of the radial gripping mechanism have two points that come into contact with the heart valve, resulting in a large area of ​​the bioprosthetic leaflet of the heart valve being affected.

[0052] Based on this, the present invention provides a compression mechanism that utilizes the method of inserting the contact portion of the first slider into the interior of the contact portion of the second slider, so that the first slider and the heart valve have only one contact point, thereby reducing the affected area of ​​the bioprosthetic leaflet of the heart valve and solving the problem of bioprosthetic leaflet damage during compression of small-sized heart valves.

[0053] It should be noted that in this utility model, the term "axial" refers to the direction parallel to the central axis of the first component and the second component, and "radial" refers to the direction perpendicular to the central axis of the first component and the second component.

[0054] The following is combined with Figures 2 to 10 The specific embodiments of this utility model are described in detail below with reference to the compression mechanism of this utility model. It should be noted that the compression mechanism of this utility model is only a preferred embodiment of this utility model, and the compression mechanism can adopt the compression mechanism of this utility model or other structures.

[0055] According to an embodiment of the present invention, a compression mechanism is provided, combined with Figures 2 to 5 As shown, the device includes a first component 1, a second component 2, and a compression component 3. The second component 2 is rotatably disposed inside the first component 1. Multiple compression components 3 are provided, each slidably disposed on the first component 1 and the second component 2 respectively. When the second component 2 rotates relative to the first component 1, each compression component 3 moves radially. Each compression component 3 includes a first slider 31 and a second slider 32. Both the first slider 31 and the second slider 32 have contact portions that contact the expandable implant. One contact portion of the first slider 31 is inserted into the interior of the contact portion of the second slider 32.

[0056] In the aforementioned compression mechanism, the number of contact points between each compression component 3 and the expandable implant has been reduced from four to three, thus reducing the contact area between the compression component 3 and the expandable implant. Fewer contact points mean less friction, reducing the area affected by the expandable implant, thereby achieving the goal of reducing the damaged area of ​​the expandable implant. Reducing damage to the expandable implant helps to extend its service life.

[0057] Expandable implants can be artificial heart valves. Reducing the contact points and contact area can prevent incomplete closure of the artificial heart valve during closure, ensuring the normal progress of the surgery.

[0058] Taking a configuration with three compression components 3 as an example, the three compression components 3 are evenly arranged circumferentially, reducing the number of contact points between the compression mechanism and the expandable implant from twelve to nine. Therefore, regardless of the number of compression components 3, the number of contact points between the compression mechanism and the expandable implant will always decrease.

[0059] In some embodiments, the first slider 31 includes a first sliding portion 311 and a first contact portion 312. The first contact portion 312 is connected to the first sliding portion 311, and the side of the first contact portion 312 closest to the central axis of the first component 1 is a first contact position 313.

[0060] The second slider 32 includes a second sliding part 321 and a second contact part 322. The second contact part 322 is connected to the second sliding part 321. An insertion hole 323 is provided on the second contact part 322. Two second contact positions 324 are located on the side of the second contact part 322 near the central axis of the first component 1. The two second contact positions 324 are located on both sides of the insertion hole 323.

[0061] In this embodiment, when the first contact portion 312 contacts the expandable implant, there is only one first contact position 313, thereby reducing the number of contact points between each compression component 3 and the expandable implant.

[0062] The first sliding portion 311 and the first contact portion 312 have an included angle, preferably an obtuse angle. The second sliding portion 321 and the second contact portion 322 have an included angle, preferably an obtuse angle.

[0063] In some embodiments, the first contact portion 312 is movably inserted into the insertion hole 323. When the compression member 3 expands or contracts, the insertion hole 323 on the second contact portion 322 can provide a moving channel for the first contact portion 312, which can prevent the first contact portion 312 from deflecting during expansion or contraction.

[0064] In some embodiments, the axial length of the first contact position 313 along the first component 1 is less than the sum of the axial lengths of the two second contact positions 324 along the first component 1.

[0065] In this embodiment, the first contact position 313 is reduced along the axial length of the first component 1, thereby reducing the contact area between the compression component 3 and the expandable implant, reducing the affected area of ​​the expandable implant, and thus achieving the purpose of reducing the damaged area of ​​the expandable implant. The smaller first contact position 313 and the two larger second contact positions 324 are staggered in contact with the expandable implant, which not only reduces the damaged area of ​​the expandable implant, but also ensures the stability and reliability of the contact.

[0066] The design of the smaller first contact 313 and the two larger second contact 324 makes the entire compression component 3 more compact and lightweight. The simplified design reduces manufacturing costs and improves production efficiency.

[0067] In some embodiments, combined with Figure 7 As shown, the first contact portion 312 has an axial length of 1–3 mm along the first component 1. (Combined) Figure 9 As shown, the second contact portion 322 has an axial length of 3-5 mm along the first component 1. In this embodiment, the contact area between the first slider 31 and the second slider 32 and the expandable implant can be precisely controlled, reducing wear and damage to the expandable implant. The specific length design of the first contact portion 312 and the second contact portion 322 can ensure the uniform distribution of contact points during the compression process, avoiding local over-compression or under-compression.

[0068] In some embodiments, the compression mechanism has an open state and a closed state. When the compression mechanism is in the open state, the inner diameter of the opening is 20–35 mm. Figure 2 and Figure 4 As shown, the compression mechanism is in the open state; combined with Figure 3 and Figure 5 As shown, the compression mechanism is in the closed state.

[0069] In some embodiments, the first contact portion 312 of the compression member 3 is also inserted into the insertion hole 323 of the second contact portion 322 of the next compression member 3.

[0070] In this embodiment, the first contact portion 312 is inserted into the insertion hole 323 of the second contact portion 322, forming a mechanical locking mechanism that enhances the connection stability between the two parts. This design can effectively reduce loosening caused by vibration or external force during use, ensuring the reliability and stability of the compression component 3 during operation.

[0071] In some embodiments, the first component 1 and the second component 2 are respectively provided with corresponding central holes 4 in the axial direction. The first contact portion 312 is located inside the central hole 4.

[0072] The first component 1 has multiple sliding holes 23 radially, and the second component 2 has multiple arc-shaped holes circumferentially.

[0073] The first sliding part 311 is slidably disposed within the sliding hole 23, and a first locking member 33 is provided on the first sliding part 311, the first locking member 33 passing through the arc-shaped hole. The first locking member 33 is a rivet.

[0074] The second sliding part 321 is slidably disposed within the sliding hole 23, and a second locking member 34 is provided on the second sliding part 321, the second locking member 34 passing through the arc-shaped hole. The second locking member 34 is a rivet.

[0075] In this embodiment, the centers of the multiple arc-shaped holes arranged circumferentially in the second component 2 are not concentric with the center of the second component 2. When the second component 2 rotates, each arc-shaped hole rotates, and the arc-shaped holes push the first locking member 33 and the second locking member 34 to move along the orientation of the arc-shaped hole. The first sliding part 311 connected to the first locking member 33 and the second sliding part 321 connected to the second locking member 34 are both restricted by the sliding hole 23, so that the first sliding part 311 and the second sliding part 321 can only move radially along the sliding hole 23, thereby converting the circumferential motion of the second component 2 into the radial motion of the first sliding part 311 and the second sliding part 321.

[0076] In one specific embodiment, the first component 1 includes a first gripping part 11 and a rotating part 12. The first gripping part 11 is a moving handle, and the rotating part 12 is a circular plate structure. The second component 2 includes a second gripping part 21 and a fixing part 22. The second gripping part 21 is a fixed handle, and the fixing part 22 is a circular plate structure with a receiving cavity inside. The rotating part 12 is disposed inside the fixing part 22, and the rotating part 12 and the fixing part 22 are connected by a third locking member 5, which is a rivet. The rotating part 12 is also provided with a second arc-shaped hole, which is concentric with the center of the rotating part 12. The third locking member 5 passes through the second arc-shaped hole, thereby allowing the rotating part 12 to rotate around the center of the fixing part 22.

[0077] The specific operation process of the above compression mechanism is as follows:

[0078] The user holds the first gripping part 11 of the first component 1, lifts the first gripping part 11, and the rotating part 12 moves counterclockwise circumferentially. The first slider 31 and the second slider 32 move radially away from the axis of the second component 2 under the drive of the rotating part 12. The compression mechanism is in the open state, combined with Figure 2 As shown.

[0079] The expandable implant is placed into the opening created by the compression mechanism.

[0080] When compression of the expandable implant is required, the user holds the first gripper 11 of the first component 1 and lowers it. The rotating part 12 moves clockwise circumferentially, and the first slider 31 and the second slider 32 move radially along the axis closer to the second component 2 under the drive of the rotating part 12, squeezing the expandable implant. The compression mechanism compresses the expandable implant, combined with... Figure 10 As shown.

[0081] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A compression mechanism, comprising: First component (1); The second component (2) is rotatably disposed inside the first component (1); Multiple compression components (3) are provided, each of which is slidably disposed on the first component (1) and the second component (2). When the second component (2) rotates relative to the first component (1), each of the compression components (3) moves radially. The compression component (3) is characterized in that it includes a first slider (31) and a second slider (32), both of which have a contact portion that contacts the expandable implant. The contact portion of the first slider (31) is provided with one and inserted into the interior of the contact portion of the second slider (32).

2. The compression mechanism according to claim 1, characterized in that, The first slider (31) includes: First sliding part (311); The first contact portion (312) is connected to the first sliding portion (311), and the side of the first contact portion (312) near the central axis of the first component (1) is the first contact position (313).

3. The compression mechanism according to claim 2, characterized in that, The second slider (32) includes: Second sliding part (321); The second contact portion (322) is connected to the second sliding portion (321). The second contact portion (322) has an insertion hole (323). The second contact portion (322) has two second contact positions (324) on one side of the second contact portion (322) near the central axis of the first component (1). The two second contact positions (324) are located on both sides of the insertion hole (323).

4. The compression mechanism according to claim 3, characterized in that, The first contact portion (312) is movably inserted into the socket (323).

5. The compression mechanism according to claim 3, characterized in that, The axial length of the first contact position (313) along the first component (1) is less than the sum of the axial lengths of the two second contact positions (324) along the first component (1).

6. The compression mechanism according to claim 3, characterized in that, The first contact portion (312) has an axial length of 1 to 3 mm along the first component (1).

7. The compression mechanism according to claim 3, characterized in that, The second contact portion (322) has an axial length of 3 to 5 mm along the first component (1).

8. The compression mechanism according to any one of claims 3-7, characterized in that, The first contact portion (312) of the compression component (3) is also inserted into the insertion hole (323) of the second contact portion (322) of the next compression component (3).

9. The compression mechanism according to any one of claims 3-7, characterized in that, The first component (1) and the second component (2) are respectively provided with corresponding central holes (4) in the axial direction; the first contact part (312) and the first contact part (312) are respectively located in the central holes (4).

10. The compression mechanism according to any one of claims 3-7, characterized in that, The first component (1) has a plurality of sliding holes (23) radially provided, and the second component (2) has a plurality of arc-shaped holes circumferentially provided; The first sliding part (311) is slidably disposed in the sliding hole (23), and a first locking member (33) is provided on the first sliding part (311), the first locking member (33) passing through the arc-shaped hole; The second sliding part (321) is slidably disposed in the sliding hole (23), and a second locking member (34) is provided on the second sliding part (321), the second locking member (34) passing through the arc-shaped hole.

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