Adjustable aorta root ring contraction device and adjusting method thereof

Abstract

The invention discloses an adjustable aorta root ring contraction device which comprises a ring body, an adjusting line, a tightness adjusting assembly and an anchoring unit, the anchoring unit is arranged on the ring body, the ring body is connected with an aorta root through the anchoring unit, the adjusting line is arranged on the ring body, the adjusting line is pulled to drive the ring body to contract, and the tightness adjusting assembly is arranged on the elastic ring body. And the tightness adjusting assembly is used for fixing the adjusting wire after the ring body is expanded and retracted. The device has the advantages that the knitted ring body is fixed at the root of the aorta through the anchoring unit, the adjusting line penetrates into the ring body, and the ring body contraction is controlled by adjusting the tightness of the adjusting line; the tightness adjusting assembly mounted on the ring body is used for initially fixing the adjusting line, and after the tightness of the ring body is determined, the tightness adjusting assembly is used for finally fixing the adjusting line, so that the stability of the ring body is ensured; the elastic adjusting mechanism is arranged on the ring body, so that uniform contraction of the elastic ring body is guaranteed, and the problem that the blood vessel wall is expanded or fractured due to excessive traction caused by stress concentration is solved.

Description

Technical Field

[0001] The present invention specifically relates to an adjustable aortic root circumduction device, specifically an adjustable aortic root circumduction device and its adjustment method. Background Technology

[0002] Aortic root dilation is a common pathological feature of many cardiovascular diseases, commonly seen in Marfan syndrome, aortic root aneurysm, bicuspid aortic valve, and other diseases. The dilated aortic root can lead to aortic valve annulus enlargement, causing aortic valve insufficiency (regurgitation), which can lead to life-threatening complications such as heart failure and cardiac arrest in severe cases.

[0003] Current treatment methods mainly involve surgery, interventional therapy, and circumferential devices, but these methods have the following problems: 1. Traditional surgery: such as aortic root replacement surgery (Bentall procedure), which requires the removal of the diseased blood vessel and replacement with an artificial blood vessel, is highly invasive, has high surgical risks, and requires long-term anticoagulation therapy.

[0004] 2. Interventional treatment: such as endovascular stent implantation, which is suitable for descending aortic lesions, but has limited support effect on aortic root dilation and may affect the coronary artery ostium.

[0005] 3. Existing annular constriction devices: Some annular support devices have complex designs, are not securely fixed, are prone to displacement, or can cause local vascular damage. Furthermore, existing techniques for aortic root annular constriction mainly consist of two types: external support rings and internal support rings. External support ring: During the operation, the lateral side of the aorta needs to be freed to the aortic root. After continuous horizontal mattress sutures on the lateral side of the aorta using CV0 sutures, the sutures are tightened and knotted. Alternatively, an artificial vascular ring can be used to fix the aorta to the lateral side.

[0006] The external support ring method has the following drawbacks: the CV0 suture cannot be adjusted after being tied at the horizontal mattress along the valve annulus. Although the external vascular ring can ensure that it is on the same horizontal plane, it also has the problem of not being able to adjust in real time. Furthermore, when adjusting the tightness of the CV0 suture, the external support cannot achieve synchronous expansion and contraction, resulting in uneven contraction, stress concentration, and the risk of re-expansion or rupture of the vascular wall due to excessive traction.

[0007] Internal support ring: The HAART 300 system is a device sutured inside the aorta, below the aortic valve, to fix the aortic valve annulus. Its advantage is that it eliminates the need for the operation of freeing the aortic root, but its disadvantage is that it may form thrombi or cause perforation of the valve leaflets.

[0008] Therefore, for external support circumduction devices, there is a need for an aortic root circumduction device with a simple structure, which can continue to be adjusted after suturing and knotting, and which can shrink and expand evenly. Summary of the Invention

[0009] The technical problem to be solved by the present invention is that the existing aortic root circumferential device mentioned in the background art has a complex structure, cannot be adjusted after suturing and knotting, and has uneven stress concentration due to contraction and expansion, which leads to excessive re-expansion or rupture of the blood vessel wall due to excessive traction.

[0010] To address the aforementioned technical problems, an adjustable aortic root annulus contraction device is proposed. This is achieved through the following technical solution: An adjustable aortic root annulus contraction device includes an annulus body, an adjusting line, a tension adjustment component, and an anchoring unit. The anchoring unit is disposed on the annulus body, and the annulus body is connected to the aortic root via the anchoring unit. The adjusting line is disposed on the annulus body; pulling the adjusting line causes the annulus body to contract, and the knotted adjusting line defines the size of the aortic valve annulus. The tension adjustment component is disposed on the elastic annulus body, and one end of the adjusting line passes through the tension adjustment component. The tension adjustment component fixes and adjusts the adjusting line after the annulus body expands and contracts.

[0011] In a preferred embodiment of the present invention, the ring body includes a support portion and a connecting portion. There are two support portions, which are connected by the connecting portion. This arrangement improves the overall support effect of the ring body and enhances its stability.

[0012] In a preferred embodiment of the present invention, the ring body is made of polyester woven fabric. The woven ring body can shrink and expand radially, and titanium wires are provided on the inner side of the ring body. The titanium wires facilitate imaging under CT and are easy to use.

[0013] In a preferred embodiment of the present invention, an elastic adjustment mechanism is further provided on the ring body. The elastic adjustment mechanism is located on the outer surface of the ring body and includes a transverse adjustment plate and a longitudinal adjustment plate. The transverse adjustment plate is located on the upper and lower end faces of the outer surface of the ring body, and the longitudinal adjustment plate is connected to the transverse adjustment plate. This arrangement facilitates the expansion or contraction of the ring body, allowing the elastic adjustment mechanism to act like a spring to drive the ring body to contract or expand uniformly, thereby improving the ability of the elastic ring body to contract uniformly.

[0014] In a preferred embodiment of the present invention, the lateral adjustment piece and the longitudinal adjustment piece include multiple connecting pieces arranged in a "W" shape, and the lateral adjustment piece and the longitudinal adjustment piece provide elasticity for the expansion of the ring.

[0015] In a preferred embodiment of the present invention, the tension adjustment assembly includes a base, a tube, and a plug. The base is disposed on the ring body, the tube is disposed on the base, and one end of the plug is inserted into the tube. The tension adjustment assembly facilitates the initial and final fixing of the tension adjustment line, and makes it convenient to adjust the tension of the ring body.

[0016] In a preferred embodiment of the present invention, the transverse and longitudinal adjustment plates include multiple "W"-shaped connecting plates, and the force between the connecting plates of the elastic ring is increased, thereby improving the ability of the elastic ring to contract uniformly.

[0017] In a preferred embodiment of the present invention, a threading port and a limiting ring are provided on the insertion tube, and a limiting groove is provided on the plug. The limiting groove cooperates with the limiting ring. The adjusting wire is inserted into the threading port and passes through the insertion tube. The insertion depth of the insertion tube is adjusted by pressing the plug. The adjusting wire passing through the insertion tube is restricted. This arrangement facilitates the initial and final fixation of the adjusting wire and makes it convenient to adjust the tightness of the ring.

[0018] In a preferred embodiment of the present invention, the anchoring unit includes multiple spaced-apart threading channels, which are disposed on the ring body. The ring body is connected to the aortic root through the threading channels. This arrangement facilitates the fixation of the position of the elastic ring body.

[0019] To address the aforementioned technical problems, this application also proposes a method for adjusting an adjustable aortic root constriction device; this is achieved through the following technical solution, specifically including the following steps: S1. Pull the adjustment line to adjust the shrinkage of the ring after fixing, pass the adjustment line through the threading port into the insertion tube, and then tie the adjustment line into a knot. S2. Observe the diameter of the valve annulus and the ascending aorta to determine if it is appropriate. If it is appropriate, proceed to step S3. If it is not appropriate, loosen the adjustment line and readjust the tightness. S3. Press the plug to fully insert it into the tube, press the adjustment wire inserted into the wire hole, and then tie a knot in the adjustment wire to complete the adjustment.

[0020] The beneficial effects of this invention compared to the prior art are: The technical solution of the present invention uses an anchoring unit to fix the braided loop to the root of the aorta, and controls the contraction of the loop by inserting an adjustment line into the loop and adjusting the tightness of the adjustment line. The tension adjustment assembly installed on the ring body is used to initially fix the adjustment line, which makes it easy to adjust the size of the ring body. After the tightness of the ring body is determined, the tension adjustment assembly can finally fix the adjustment line to ensure the stability of the ring body. Furthermore, by setting an elastic adjustment mechanism on the ring body, the uniform contraction of the elastic ring body is ensured, effectively preventing the problem of excessive traction and re-expansion or rupture of the blood vessel wall caused by stress concentration. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of Embodiment 1 of the present invention; Figure 2 This is a three-dimensional schematic diagram of Embodiment 2 of the present invention; Figure 3This is a three-dimensional schematic diagram of the elastic adjustment mechanism; Figure 4 This is a three-dimensional schematic diagram of the tension adjustment component; Figure 5 This is a partial cross-sectional view of the tension adjustment component; Figure 6 A schematic diagram of the tension adjustment component after the adjustment line is inserted (partial sectional view). Figure 7 Schematic diagram after fixing the adjustment line to the tension adjustment component (partial sectional view); Explanation of reference numerals in the attached drawings: 1-Ring body, 11-Support part, 12-Connecting part, 13-Installation notch, 14-Threading channel, 15-Separation line, 2-Elastic adjustment mechanism, 21-Horizontal adjustment piece, 22-Longitudinal adjustment piece, 3-Adjustment line, 4-Tightness adjustment component, 5-Base, 6-Insertion tube, 61-Limiting ring, 62-Threading port, 7-Plug, 71-Limiting groove. Detailed Implementation

[0022] The following will refer to the appendices in the embodiments of the present invention. Figure 1-7 The technical solutions in the embodiments of the present invention will be described in detail below. Example 1

[0023] like Figure 1 As shown, an adjustable aortic root circumduction device includes a ring body 1 and an adjustment line 3. The ring body 1 is fitted around the aortic root and sutured to the aortic root using surgical sutures. The adjustment line 3 passes through the ring body 1, allowing the ring body 1 to expand and contract. Pulling the adjustment line 3 adjusts the degree of contraction of the ring body 1, thereby achieving circumduction of the aortic root.

[0024] The annulus 1 serves as the base of the device and is fitted around the root of the aorta. By adjusting the contraction of the annulus 1, the diameter of the aortic valve annulus can be adjusted.

[0025] The main function of the regulating line 3 is to use the regulating line 3 to pull the annulus 1 to contract, thereby achieving annular contraction at the root of the aorta.

[0026] Definition: In this embodiment, the inner side of the ring 1 that contacts the blood vessel is the inner side, and the other side is the outer side. The annular end of the ring 1 is the upper end and the other end is the lower end.

[0027] like Figure 1 As shown, the ring 1 is a circular ring made of polyester that meets medical standards. In this embodiment, the ring 1 is preferably made of rib knitting to ensure that the ring 1 can be stretched or contracted in the radial direction. The ring 1 includes a support part 11 and a connecting part 12. There are two support parts 11, and the two ends of the connecting part 12 are respectively connected to the support parts 11.

[0028] The support part 11 is a tube with a circular cross-section, and the inner side of the support part 11 is in contact with the outer wall of the aortic root.

[0029] The connecting part 12 is a woven piece with a rectangular cross-section, and its two end faces along the axial direction are integrally connected to the support part 11.

[0030] To facilitate adjustment of the contraction of the annulus 1 and thus the diameter of the aortic root, the middle part of the annulus 1 is cut open to provide an installation notch 13. The annulus 1 is fitted onto the aortic root through the installation notch 13 and is sutured to the aortic root using surgical sutures. By adjusting the distance between the two ends of the annulus 1, the annulus 1 can be contracted and adjusted, thereby adjusting the diameter of the aortic valve annulus.

[0031] To facilitate adjustment of the contraction of the ring body 1, the middle part of the ring body 1 is divided into three parts evenly using the dividing line 15. The main function of the dividing line 15 is to adjust the contraction of the ring body 1 using the adjusting line 3 so that each part separated by the dividing line 15 can contract independently, avoiding uneven contraction at a certain position due to the distance being too long when the entire ring body 1 contracts.

[0032] Regarding the installation method of the separator line 15 on the ring body 1, in this embodiment, it is preferred that the separator line 15 is sewn onto the ring body 1.

[0033] The adjustment line 3 is made of existing ePTFE. The adjustment line 3 passes through the support part 11 on the ring body 1. By tightening both ends of the adjustment line 3 and adjusting the tightness of the two ends, the degree of contraction of the ring body 1 can be controlled.

[0034] There are two adjustment lines 3, which pass through the two support parts 11 of the ring body 1 respectively.

[0035] Regarding the method of adjusting the contraction of ring 1 using adjustment line 3: One end of the adjustment line 3 passes through the support part 11 on the ring body 1 from the installation notch 13, runs through the entire support part 11, and then extends out from the installation notch 13. When the adjustment line 3 is tightened, the adjustment line 3 can drive the ring body 1 to contract under the action of its own braided structure, thereby achieving the circumduction of the aortic root.

[0036] The adjustment method for the adjustable aortic root annulus constriction device includes the following steps: S1. Pull the adjusting line 3 to adjust and fix the ring body 1 to shrink, pass the adjusting line 3 through the threading port 62 through the insertion tube 6, and then tie the adjusting line 3 into a knot. S2. Observe the diameter of the valve annulus and the ascending aorta to determine if it is appropriate. If it is appropriate, proceed to step S3. If it is not appropriate, loosen the adjustment line 3 and readjust the tightness. S3. Tie the adjustment line 3 in a final knot to secure it, and the adjustment is complete.

[0037] The usage process of this embodiment is as follows: First, through the installation notch 13, the annulus 1 is placed on the root of the aorta. Then, the annulus 1 is sewn to the root of the aorta using sutures. At this time, the annulus 1 can be adjusted by adjusting the adjustment line 3. When adjusting, first pull the adjustment line 3 to the appropriate tightness and then tie a knot. Then observe the diameter of the valve annulus. If it is not appropriate, untie the adjustment line 3 and readjust the tightness as needed. If it is appropriate, then fix the adjustment line 3 in the final stage. Example 2

[0038] like Figure 2 As shown, in order to further enhance the uniform contraction of the ring body 1 and adjust the tightness of the adjustment line 3, multiple sets of elastic adjustment mechanisms 2 and tightness adjustment components 4 can be set on the basis of embodiment 1. Each set of elastic adjustment mechanisms 2 is located between two dividing lines 15, and the tightness adjustment components 4 are fixed on the ring body 1 and located at the installation notch 13. In addition, in order to facilitate the fixing of the ring body 1 to the aortic root, an anchoring unit 8 is also provided on the ring body 1.

[0039] The main function of the elastic adjustment mechanism 2 is to make the ring body 1 contract evenly when adjusting the contraction of the ring body 1, so as to prevent stress concentration and the problem of excessive traction causing the blood vessel wall to expand or rupture.

[0040] The main function of the anchoring unit 8 is to fix the position of the ring 1 and fix the entire device to the root of the aorta.

[0041] The main function of the tension adjustment component 4 is to fix the tension of the adjustment line 3, so as to facilitate the adjustment of the ring 1 to the optimal diameter.

[0042] like Figure 2 and 3 As shown, each set of elastic adjustment mechanisms 2 includes two lateral adjustment plates 21 and one longitudinal adjustment plate 22, with the two ends of the longitudinal adjustment plate 22 connected to the lateral adjustment plates 21 respectively.

[0043] The transverse adjustment piece 21 and the longitudinal adjustment piece 22 are made of existing medical-grade polyurethane material. Both the transverse adjustment piece 21 and the longitudinal adjustment piece 22 include multiple connecting pieces distributed in a "W" shape. The size of the connecting pieces on the transverse adjustment piece 21 is slightly shorter than that on the longitudinal adjustment piece 22. The transverse adjustment piece 21 is set horizontally, and the longitudinal adjustment piece 22 is set vertically. The transverse adjustment piece 21 and the longitudinal adjustment piece 22 are connected to form a "U" shape. This arrangement enables the elastic adjustment mechanism 2 to be elastic. When stretched, the elastic adjustment mechanism 2 extends, and when released, the elastic adjustment mechanism 2 contracts, which facilitates the uniform shrinkage of the ring body 1.

[0044] Regarding the connection of the elastic adjustment mechanism 2 on the ring body 1, there are multiple sets of elastic adjustment mechanisms 2. Each set of elastic adjustment mechanisms 2 is set in a small segment separated by two dividing lines 14 on the ring body 1. The two ends of the two transverse adjustment pieces 21 in each set of elastic adjustment mechanisms 2 are fixedly connected to the upper and lower end faces of the ring body 1 respectively. The connection method is an existing connection method, such as bio-adhesive bonding.

[0045] Three elastic adjustment mechanisms 2 are installed inside the ring body 1. This arrangement allows multiple elastic adjustment mechanisms 2 to contract synchronously when the adjustment line 3 is pulled to adjust the ring body 1. When it is necessary to loosen the adjustment line 3 to relax the ring body 1, the ring body 1 can be evenly expanded under the action of the elastic adjustment mechanism 2, preventing stress concentration in the ring body 1, which could lead to excessive traction causing the blood vessel wall to re-expand or rupture.

[0046] like Figure 1 and 2 As shown, the anchoring unit 8 includes multiple threading channels 14, each of which is a circular through hole. The threading channels 14 are evenly distributed on the connecting part 12. Sutures can be used to pass through the threading channels 14 and perform a mattress suture along the valve annulus to suture the annulus 1 to the aortic root.

[0047] The threading channel 14 is opened at the same level as the connecting part 12. This arrangement allows the annular device to be stably attached to the upper part of the aortic valve annulus at the level of the aortic valve annulus.

[0048] like Figure 2 , 4 As shown in Figures 5, 6 and 7, the tension adjustment assembly 4 includes a base 5, a tube 6 and a plug 7. The base 5 is fixed on the ring body 1 and is located at the mounting notch 13 of the ring body 1. The tube 6 is fixed on the base 5 and the plug 7 is movably inserted into the tube 6.

[0049] The base 5 is a rectangular plate made of plastic. In this embodiment, it is preferably made of polyethylene that meets medical standards. The base 5 is fixed on the ring 1, near the mounting notch 13. The fixing method can adopt existing technology, such as heat fixation or bio-adhesive bonding. The end of the adjustment line 3 near this end is also fixed on the base 5, which can be glued.

[0050] The insertion tube 6 is a circular plastic tube with openings at both ends. The insertion tube 6 is fixed integrally with the base 5. In order to facilitate the installation of the adjustment line 3, a circular hole is opened on the side of the insertion tube 6. This hole is named the wire passage 62. The adjustment line 3 can pass through this wire passage 62.

[0051] The plug 7 is a round plastic rod. One end of the plug 7 is fixedly connected to the base 5 through flexible plastic, and the other end is inserted into the insertion tube 6. In order to ensure the stability of the plug 7 when inserted into the insertion tube 6, two circular limiting rings 61 are protruding outward along the axis on the inner arc surface of the insertion tube 6. The one closer to the opening of the insertion tube 6 is named the first limiting ring, and the other is named the second limiting ring. The distance between the two limiting rings 61 is slightly larger than the diameter of the adjusting line 3, but smaller than the size of the adjusting line 3 after knotting.

[0052] Two circular limiting grooves 71 are recessed on the arc-shaped surface of the plug 7. The two limiting grooves 71 are distributed axially at intervals. The limiting groove 71 near the end of the plug 7 that is inserted into the insertion tube 6 is named the first limiting groove, and the other is named the second limiting groove. The two limiting grooves 71 can cooperate with the limiting ring 61.

[0053] To ensure the stability of the insertion of the plug 7 into the cannula 6, the diameter of the plug 7 is slightly smaller than the inner diameter of the cannula 6, but the outer diameter of the limiting ring 61 is equal to the inner diameter of the limiting groove 71. Since both the cannula 6 and the plug 7 are made of plastic, a certain force (e.g., 100-200N, to ensure that the limiting ring 61 will not fall out of the limiting groove 71 during normal use) is required to complete the engagement between the limiting ring 61 and the limiting groove 71, and to ensure that the plug 7 will not fall out of the cannula 6 during normal use inside the human body.

[0054] Two insertion tubes 6 and plugs 7 are spaced apart on the base 5 to facilitate the fixing of the two adjustment wires 3 respectively.

[0055] Regarding the use of the tension adjustment component 4, first insert the plug 7 into the insertion tube 6, but be careful not to insert the plug 7 completely into the insertion tube 6, i.e., the first limiting groove is in the state of engaging with the first limiting ring. At this time, the unfixed end of the adjustment line 3 can be passed through the wire hole 62 and out from the other side of the insertion tube 6. Pulling the adjustment line 3 can adjust the tension of the ring body 1. After the initial adjustment, a loose joint can be made on the adjustment line 3. Since the distance between the two limiting rings 61 is slightly larger than the diameter of the adjustment line 3 but smaller than the size of the knotted adjustment line 3, the knotted adjustment line 3 will not fall out of the insertion tube 6. You can then observe the diameter of the valve ring and check whether the reduced size of the ring body 1 is appropriate. If it is not appropriate, untie the joint of the adjustment line 3 and readjust. If it is appropriate, continue to press the plug 7 to fully engage the two limiting rings 61 and the two limiting grooves 71 (during this process, be careful not to move the adjustment line 3). At the same time, tie the adjustment line 3 for final fixation.

[0056] The adjustment method for the adjustable aortic root annulus constriction device includes the following steps: S1. Pull the adjusting line 3 to adjust and fix the ring body 1 to shrink, pass the adjusting line 3 through the threading port 62 through the insertion tube 6, and then tie the adjusting line 3 into a knot. S2. Observe the diameter of the valve annulus and the ascending aorta to determine if it is appropriate. If it is appropriate, proceed to step S3. If it is not appropriate, loosen the adjustment line 3 and readjust the tightness. S3. Press the plug 7 to fully insert the plug 7 into the tube 6, press the adjustment wire 3 inserted into the wire hole 62, and then tie the adjustment wire 3 to complete the adjustment.

[0057] The usage process of this embodiment is as follows: First, through the installation notch 13, the annulus 1 is placed on the root of the aorta. Then, using the suture and thread channel 14, the annulus 1 is sewn to the root of the aorta. At this time, the annulus 1 can be adjusted by adjusting the adjustment line 3. When adjusting, first insert the end of the adjustment line 3 into the thread port 62, then pull the adjustment line 3 to the appropriate tightness and tie a knot initially (during this process, the elastic adjustment mechanism 2 is compressed). Then observe the diameter of the valve annulus. If it is appropriate, press the plug 7 completely into the cannula 6, and then fix the adjustment line 3 a second time to ensure that it will not slip. If it is not appropriate, untie the adjustment line 3 as needed. Then the annulus 1 will unfold under the action of the elastic adjustment mechanism 2. Then, readjust the tightness according to the above steps according to the actual tightness.

[0058] The above embodiments are merely illustrative of the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made to the technical solutions based on the technical concept proposed in this invention shall fall within the scope of protection of this invention.

Claims

1. An adjustable aortic root annulus constriction device, characterized in that: The device includes a ring body (1), an adjustment line (3), a tension adjustment assembly (4), and an anchoring unit (8). The anchoring unit (8) is set on the ring body (1), and the ring body (1) is connected to the aortic root through the anchoring unit (8). The adjustment line (3) is set on the ring body (1). Pulling the adjustment line (3) causes the ring body (1) to contract. The knotted adjustment line (3) limits the size of the aortic valve forming ring. The tension adjustment assembly (4) is set on the elastic ring body (1). One end of the adjustment line (3) passes through the tension adjustment assembly (4). The tension adjustment assembly (4) fixes and adjusts the adjustment line (3) after the ring body (1) expands and contracts.

2. The adjustable aortic root annulus constriction device according to claim 1, characterized in that: The ring body (1) includes a support part (11) and a connecting part (12). There are two support parts (11), and the two support parts (11) are connected by the connecting part (12).

3. The adjustable aortic root annulus constriction device according to claim 1, characterized in that: The ring (1) is made of polyester. The woven ring (1) can shrink and expand radially, and titanium wires are provided on the inner side of the ring (1).

4. The adjustable aortic root annulus constriction device according to claim 1, characterized in that: An elastic adjustment mechanism (2) is also provided on the ring body (1). The elastic adjustment mechanism (2) is located on the outer side of the ring body (1). The elastic adjustment mechanism (2) includes a transverse adjustment piece (21) and a longitudinal adjustment piece (22). The transverse adjustment piece (21) is located on the upper and lower end faces of the outer side of the ring body (1). The longitudinal adjustment piece (22) is connected to the transverse adjustment piece (21).

5. The adjustable aortic root annulus constriction device according to claim 4, characterized in that: The lateral adjustment piece (21) and the longitudinal adjustment piece (22) include multiple "W"-shaped connecting pieces, which provide elasticity for the expansion of the ring (1).

6. The adjustable aortic root annulus constriction device according to claim 1, characterized in that: The tension adjustment assembly (4) includes a base (5), a cannula (6) and a plug (7). The base (5) is set on the ring (1), the cannula (6) is set on the base (5), and one end of the plug (7) is inserted into the cannula (6).

7. The adjustable aortic root annulus constriction device according to claim 6, characterized in that: A wire-passing port (62) and a limiting ring (61) are provided on the insertion tube (6), and a limiting groove (71) is provided on the plug (7). The limiting groove (71) cooperates with the limiting ring (61). The adjusting wire (3) is inserted into the wire-passing port (62) and passes through the insertion tube (6). The depth of insertion into the insertion tube (6) is adjusted by pressing the plug (7), which limits the adjusting wire (3) passing through the insertion tube (6).

8. The adjustable aortic root annulus constriction device according to claim 1, characterized in that: The anchoring unit (3) includes multiple spaced threading channels (14), which are disposed on the ring body (1) and the ring body (1) is connected to the aortic root through the threading channels (14).

9. The adjustment method of the adjustable aortic root annulus constriction device according to claims 1-8, characterized in that: Specifically, the steps include the following: S1. Pull the adjustment line (3) to adjust and fix the ring (1) to shrink, pass the adjustment line (3) through the threading port (62) through the insertion tube (6), and then tie the adjustment line (3) into a knot. S2. Observe the diameter of the valve annulus and the ascending aorta to determine if it is appropriate. If it is appropriate, proceed to step S3. If it is not appropriate, untie the adjustment line (3) and readjust the tightness. S3. Press the plug (7) to fully insert the plug (7) into the tube (6), press the adjustment wire (3) inserted into the wire hole (62) tightly, and then tie the adjustment wire (3) to complete the adjustment.

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