Aorta root suturing auxiliary device

Abstract

The invention discloses an aorta root suture auxiliary device, and belongs to the field of medical instruments. The outer fixing ring is arranged outside the inner fixing ring in a sliding and sleeving mode in the matching direction, the outer fixing ring is provided with two movable parts, an opening is formed in the position, between the two movable parts, of the outer fixing ring in a penetrating mode in the matching direction, the inner diameter of the outer fixing ring is increased when the movable parts move back to back, and the inner diameter of the outer fixing ring is reduced when the movable parts move in the opposite direction; the inner diameter of the outer fixing ring is always greater than the outer diameter of the inner fixing ring; a pericardial sheet is arranged between the inner fixing ring and the outer fixing ring, the inner fixing ring with the pericardial sheet is arranged on the inner side of the aorta wall, and the outer fixing ring is arranged on the outer side during use. By means of the arrangement, a doctor can be assisted in conducting segmented suturing on the aorta blood vessel in a great vessel operation by fixing the position of the pericardial sheet.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to an aortic root suturing auxiliary device. Background Art

[0002] Aortic dissection refers to the blood in the aorta cavity entering the aortic media from the tear in the aortic intima, causing the media to separate and expand along the long axis of the aorta to form a state of separation between the true and false cavities of the aortic wall. Type A aortic dissection is a disease with a very high mortality and disability rate. Surgical treatment is the main method for this disease. Part of the surgical procedure is the replacement of the ascending aorta, and the treatment of the aortic root is the difficulty and risk point of this operation. The "sandwich" method is an important way to deal with the aortic root. The method is briefly described as padding felt sheets or pericardial sheets inside and outside the aortic vessel wall, suturing three layers to reinforce the root and create an anastomosis plane with the artificial blood vessel.

[0003] However, the traditional suturing method requires trimming the felt piece or pericardium piece, which is not easy to place and is inconvenient to suturing. It is also easy to cause uneven and irregular suturing.

[0004] In view of the above problems, the present invention provides an aortic root suturing auxiliary device. Summary of the invention

[0005] In order to overcome the problems raised in the background technology, the present invention adopts the following technical solutions:

[0006] An aortic root suturing auxiliary device, comprising:

[0007] An inner fixing ring, which is a closed circular ring;

[0008] The outer fixing ring is a non-closed circular ring, and is slidably sleeved on the outside of the inner fixing ring along a matching direction. The outer fixing ring has two movable parts, and an opening is provided between the two movable parts along the matching direction. When the movable parts move in opposite directions, the inner diameter of the outer fixing ring increases, and when the movable parts move in opposite directions, the inner diameter of the outer fixing ring decreases. The inner diameter of the outer fixing ring is always larger than the outer diameter of the inner fixing ring; a gap is provided between the inner fixing ring and the outer fixing ring along the matching direction;

[0009] An adjustment plate 1 is connected to one of the movable parts of the outer fixed ring, and a limiting hole is provided through the adjustment plate 1;

[0010] A second adjusting plate connected to another movable portion of the outer fixing ring, wherein the second adjusting plate is provided with tooth grooves;

[0011] The adjustment structure includes a connecting shaft, a limiting member and a gear. The limiting member and the gear are both sleeved on the connecting shaft. The connecting shaft passes through the limiting hole and the tooth groove along its own axial direction. The gear is always engaged with the tooth groove. When the connecting shaft moves circumferentially, the two movable parts move relative to each other. When the limiting member is sleeved on the limiting hole, the circumferential movement of the connecting shaft is limited.

[0012] The pericardium sheet is pre-placed on the outside of the inner fixing ring and the inside of the outer fixing ring. When in use, the inner fixing ring with the pericardium sheet is placed inside the aortic wall, and the outer fixing ring is placed outside. The pericardium sheet is fixed to the blood vessel wall through a mattress suture in the gap between the first inner ring and the second inner ring, the first inner ring and the first outer ring are removed, and the pericardium is fixed to the blood vessel wall by continuous suture. After the suture is completed, the second inner ring and the second outer ring are removed to complete the suture.

[0013] Furthermore, the adjustment structure also includes an elastic reset member, the elastic reset member and the limit member are arranged at both ends of the connecting shaft, the other end of the elastic reset member is connected to the second adjusting plate, the elastic reset member is connected to the second adjusting plate and maintains the adjustment structure in an initial position, when the adjustment structure is in the initial position, the limit member is sleeved in the limit hole and limits the circumferential movement of the connecting shaft, when the limit member moves away from the inner fixing ring along the axial direction of the connecting shaft and disengages from the limit hole, the adjustment structure can rotate around the circumference of the connecting shaft. By providing the elastic reset member, the inner diameter of the outer fixing ring can be fixed by matching the limit member and the limit hole when there is no need to adjust the tightness of the outer fixing ring.

[0014] Furthermore, an abutment sheet is provided at one end of the connecting shaft connected to the elastic return member. The abutment sheet has an abutment end surface, and the abutment end surface is perpendicular to the axial direction of the connecting shaft.

[0015] Furthermore, the inner fixing ring is surrounded by a plurality of inner suture holes, and the outer fixing ring is surrounded by a plurality of outer suture holes. When the outer fixing ring is not subjected to external force, the outer suture holes on the outer fixing ring do not correspond to the inner suture holes on the inner fixing ring, so as to prevent the inner suture thread from penetrating into the outer suture hole or the outer suture thread from penetrating into the inner suture hole when the inner suture hole is aligned with the outer suture hole.

[0016] Furthermore, the outer fixing ring is also provided with an outer suture thread passing through the outer suture hole, and the two ends of each of the outer suture thread are respectively connected to the adjustment plate one and the adjustment plate two; the inner fixing ring is also provided with an inner suture thread passing through the inner suture hole, and the two ends of each of the inner suture thread are retained in the inner fixing ring.

[0017] Furthermore, it also includes a pericardial sheet, which is arranged around the outside of the inner fixing ring. The inner suture thread penetrates the pericardial sheet when passing through the inner suture hole. When the inner suture thread moves toward the central axis of the inner fixing ring, the inner diameter of the pericardial sheet decreases.

[0018] Furthermore, the inner fixed ring includes a first inner ring and a second inner ring, the gap of the inner fixed ring is arranged between the first inner ring and the second inner ring, the first inner ring and the second inner ring are arranged in an array along the matching direction, the central axis of the first inner ring coincides with the central axis of the second inner ring and the inner diameter of the first inner ring is always the same as the inner diameter of the second inner ring; an inner connecting piece is arranged between the first inner ring and the second inner ring, and both ends of the inner connecting piece are respectively plug-connected to the first inner ring and the second inner ring.

[0019] Furthermore, the outer fixing ring includes a first outer ring and a second outer ring, a gap of the outer fixing ring is arranged between the first outer ring and the second outer ring, the first outer ring and the second outer ring are arranged in an array along the mating direction, the first outer ring is arranged on the outside of the first inner ring, the second outer ring is arranged on the outside of the second inner ring, the first outer ring and the second outer ring are detachably connected, and the outer fixing ring is a non-closed loop; an external connecting piece is arranged between the first outer ring and the second outer ring, and both ends of the external connecting piece are respectively plug-connected to the first outer ring and the second outer ring.

[0020] Furthermore, the number of the first inner ring is at least one, the number of the second inner ring is at least one; the number of the inner connecting members is at least two, and the inner connecting members are distributed in a ring array around the central axis of the inner fixed ring.

[0021] Furthermore, the number of the first inner ring is at least one, the number of the second outer ring is at least one, and the number of the external connecting members is at least three.

[0022] Furthermore, there is a gap between the first outer ring and the second outer ring, and the gap length is at least 2 mm along the mating direction; there is a gap between the first inner ring and the first inner ring, and the gap length is at least 2 mm along the mating direction.

[0023] Beneficial effects of the present invention:

[0024] 1. An internal fixing ring, an external fixing ring and a pericardial piece are provided. The pericardial piece is fixed to the outer wall of the internal fixing ring through the internal suture line and is placed in a fixed shape inside the two disconnected aortic vessels of the patient. Then the external fixing ring is sleeved on the outside of the two aortic vessels; thus, the two sections of the blood vessels can be connected through the pericardial piece, and then the internal fixing ring and the pericardial piece are fixed in the blood vessel through the effect of the adjustable inner diameter of the external fixing ring. Therefore, the device can shape a stable shape for the pericardial piece and fix the pericardial piece in the blood vessel for the doctor to suture, which has a good technical effect.

[0025] 2. By setting a gap between the inner and outer fixing rings, the doctor can sew the blood vessels and the pericardial piece through the gap after the inner and outer fixing rings fix the two sections of the blood vessels, and can effectively prevent the pericardial piece from moving axially, circumferentially or radially along the inner fixing ring during the suturing process. Compared with the current operation method, it has extremely high operation stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of an overall structure of the present invention;

[0027] Figure 2 for Figure 1 A schematic cross-sectional structure diagram of ;

[0028] Figure 3 It is a schematic diagram of the assembly structure of the adjustment plate 1, the adjustment plate 2 and the adjustment structure of the present invention;

[0029] Figure 4 It is a structural schematic diagram of the regulating structure of the present invention;

[0030] Figure 5 This is a schematic diagram of the overall structure of the pericardium piece;

[0031] Figure 6 It is a schematic diagram of an overall structure of the present invention;

[0032] Figure 7 for Figure 6 A schematic diagram of the overall structure when the inner fixing ring is not assembled;

[0033] Figure 8 for Figure 6 A schematic diagram of the overall structure when the inner fixing ring is not assembled;

[0034] Fig. 9 It is a schematic diagram of the overall structure of the present invention when the adjustment structure is in the initial position;

[0035] In the figure, 1. inner fixing ring; 11. first inner ring; 12. second inner ring; 13. inner connecting piece; 14. inner suture hole; 15. inner suture line; 16. gap; 2. outer fixing ring; 21. first outer ring; 22. second outer ring; 23. outer connecting piece; 24. outer suture hole; 25. outer suture line; 26. matching direction; 27. movable part; 28. opening; 3. adjusting plate one; 31. limiting hole; 4. adjusting plate two; 41. tooth groove; 5. adjusting structure; 51. connecting shaft; 52. limiting piece; 53. gear; 54. elastic reset piece; 55. abutment piece; 551. abutment end face; 6. pericardial piece. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention are described clearly and completely below through specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation methods. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] An aortic root suture auxiliary device comprises: an inner fixing ring 1, which is a closed circular ring; an outer fixing ring 2, which is a non-closed circular ring, and is slidably sleeved on the outside of the inner fixing ring 1 along a matching direction 26. The outer fixing ring 2 has two movable parts 27, and an opening 28 is provided between the two movable parts 27 along the matching direction 26. When the movable parts 27 move in opposite directions, the inner diameter of the outer fixing ring 2 increases, and when the movable parts 27 move in opposite directions, the inner diameter of the outer fixing ring 2 decreases, and the inner diameter of the outer fixing ring 2 is always greater than the outer diameter of the inner fixing ring 1; a gap 16 is provided between the inner fixing ring 1 and the outer fixing ring 2 along the matching direction 26. An adjusting plate 1 3 is connected to one of the movable parts 27 of the outer fixing ring 2, and a limiting hole 31 is provided through the adjusting plate 1 3; an adjusting plate 2 4 is connected to the other movable part 27 of the outer fixing ring 2, and a tooth groove 41 is provided through the adjusting plate 2 4. The adjustment structure 5 includes a connecting shaft 51, a stopper 52 and a gear 53. The stopper 52 and the gear 53 are both sleeved on the connecting shaft 51. The connecting shaft 51 passes through the stopper hole 31 and the tooth groove 41 along its own axial direction. The gear 53 is always engaged with the tooth groove 41. When the connecting shaft 51 moves circumferentially, the two movable parts 27 move relative to each other. When the stopper 52 is sleeved on the stopper hole 31, the circumferential movement of the connecting shaft 51 is limited. Among them, the pericardium sheet 6 is pre-placed on the outer side of the inner fixing ring 1 and the inner side of the outer fixing ring 2. When in use, the inner fixing ring 1 with the pericardium sheet 6 is placed on the inner side of the aortic wall, and the outer fixing ring 2 is placed on the outer side of the aortic wall. The inner fixing ring 1 and the outer fixing ring 2 sandwich the patient's aortic wall. The pericardial sheet 6 is fixed to the blood vessel wall by mattress suture in the gap 16 between the first inner ring 11 and the second inner ring 12, that is, the pericardial sheet 6 is fixed to the aortic wall; after the fixation is completed, the first inner ring 11 and the first outer ring 21 are pulled out, and the pericardial sheet 6 and the aortic wall are continuously sutured to fix the pericardial sheet 6 to the aortic wall. After the suture fixation is completed, the second inner ring 12 and the second outer ring 22 are removed to complete the suturing.

[0038] In some embodiments of the present application, Figure 1-9As shown, the adjustment structure 5 also includes an elastic reset member 54, and the elastic reset member 54 and the limit member 52 are arranged at both ends of the connecting shaft 51, wherein the elastic reset member 54 is arranged at one end of the connecting shaft 51 facing the inner fixing ring 1, and the limit member 52 is arranged at one end of the connecting shaft 51 away from the inner fixing ring 1. The elastic reset member 54 is connected to the adjustment plate 24 and maintains the adjustment structure 5 in an initial position. When the adjustment structure 5 is in the initial position, the limit member 52 is sleeved in the limit hole 31 and limits the circumferential movement of the connecting shaft 51. When the adjustment structure 5 is in the initial position, the elastic reset member 54 is not squeezed or pulled in the axial direction of the connecting shaft 51. When the limit member 52 moves away from the inner fixing ring 1 along the axial direction of the connecting shaft 51 and disengages from the limit hole 31, the adjustment structure 5 can rotate around the circumference of the connecting shaft 51, and at this time, the elastic reset member 54 is elastically deformed and stores energy in the axial direction of the connecting shaft 51. By providing the elastic reset member 54 , when there is no need to adjust the tightness of the outer fixing ring 2 , the inner diameter of the outer fixing ring 2 can be fixed by matching the limiting member 52 with the limiting hole 31 .

[0039] The other end of the elastic reset member 54 is connected to the adjustment plate 2 4, and when the adjustment structure 5 is out of the initial position, the contact piece 55 moves toward the adjustment plate 2 4. The elastic reset member 54 is a spring, a tension spring, or an elastic band. When the elastic reset member 54 is a spring or a tension spring, the elastic reset member 54 is sleeved on the outer side of the connecting shaft 51, thereby preventing the elastic reset member 54 from pulling the adjustment structure 5 away from the original axial direction; when the elastic reset member 54 is two or more springs, two or more tension springs, or multiple elastic bands, the elastic reset member 54 is arranged in a circumferential array around the central axis of the connecting shaft 51, thereby ensuring that the elastic reset member 54 pulls the adjustment structure 5 away from the original axial direction.

[0040] In some embodiments of the present application, Figure 1-9 As shown, one end of the connecting shaft 51 connected to the elastic reset member 54 is further provided with an abutting piece 55, and the abutting piece 55 has an abutting end face 551, and the abutting end face 551 is perpendicular to the axial direction of the connecting shaft 51. The abutting end face 551 faces the inner fixing ring 1, and when the pericardial sheet 6 is arranged between the inner fixing ring 1 and the outer fixing ring 2, the abutting end face 551 of the abutting piece 55 can abut against the pericardial sheet 6 when the adjusting structure 5 is in the initial position, so as to spread the pressure of the adjusting structure 5 on the patient's blood vessel when the limiting member 52 is squeezed and moves toward the patient's blood vessel; at the same time, when the adjusting structure 5 squeezes the blood vessel, the elastic reset member 54 can also reduce the pressure of the adjusting structure 5 on the blood vessel.

[0041] In some embodiments of the present application, Figure 1-9As shown, the inner fixing ring 1 is surrounded by a plurality of inner suture holes 14, and the outer fixing ring 2 is surrounded by a plurality of outer suture holes 24. When the outer fixing ring 2 is not subjected to external force, the outer suture holes 24 on the outer fixing ring 2 do not correspond to the inner suture holes 14 on the inner fixing ring 1, so as to prevent the inner suture thread 15 from penetrating the outer suture hole 24 or the outer suture thread 25 from penetrating the inner suture hole 14 when the inner suture hole 14 is aligned with the outer suture hole 24. The outer fixing ring 2 is also provided with outer suture threads 25 penetrating the outer suture holes 24, and the two ends of each outer suture thread 25 are respectively connected to the adjustment plate 1 3 and the adjustment plate 2 4; the inner fixing ring 1 is also provided with inner suture threads 15 penetrating the inner suture holes 14, and the two ends of each inner suture thread 15 are retained in the inner fixing ring 1. The first inner ring 11 and the second inner ring 12 are both provided with the same inner suture hole 14, and the first inner ring 11 and the second inner ring 12 are respectively provided with an inner suture thread 15; the first outer ring 21 and the second outer ring 22 are both provided with the same outer suture hole 24, and the first outer ring 21 and the second outer ring 22 are respectively provided with an outer suture thread 25. The outer suture thread 25 provided on the outer fixing ring 2 extends from the outside into one of the outer suture holes 24 on the outer fixing ring 2 and extends outward from the adjacent outer suture holes 24, and the outer suture thread 25 passes through each of the adjacent outer suture holes 24 in sequence, and the provision of the outer suture thread 25 can facilitate the fixing of the pericardium sheet 6 and the outer fixing ring 2; the connection relationship between the inner fixing ring 1 and the inner suture thread 15 is similar, and the inner fixing ring 1 and the pericardium sheet 6 can also be connected through the inner suture thread 15.

[0042] In some embodiments of the present application, Figure 1-9 As shown, the inner fixed ring 1 includes a first inner ring 11 and a second inner ring 12, a gap 16 of the inner fixed ring 1 is arranged between the first inner ring 11 and the second inner ring 12, the first inner ring 11 and the second inner ring 12 are arranged in an array along the matching direction 26, the central axis of the first inner ring 11 coincides with the central axis of the second inner ring 12 and the inner diameter of the first inner ring 11 is always the same as the inner diameter of the second inner ring 12; an inner connecting member 13 is arranged between the first inner ring 11 and the second inner ring 12, and both ends of the inner connecting member 13 are respectively plug-connected to the first inner ring 11 and the second inner ring 12.

[0043] In some embodiments of the present application, Figure 1-9As shown, the pericardial sheet 6 is also included. The pericardial sheet 6 is arranged outside the inner fixing ring 1 in a circumferential manner. The inner suture 15 penetrates the pericardial sheet 6 when passing through the inner suture hole 14. When the inner suture 15 moves toward the central axis of the inner fixing ring 1, the inner diameter of the pericardial sheet 6 is reduced, so that the inner diameter of the pericardial sheet 6 when it is surrounded is closer to the outer diameter of the inner fixing ring 1. By suturing and fixing the pericardial sheet 6 with the inner suture 15 that passes through the first inner ring 11 and the second inner ring 12, respectively, the pericardial sheet 6 can be stably fixed outside the first inner ring 11 and the second inner ring 12, so that it is convenient to sew the pericardial sheet 6 with the patient's blood vessel wall through the gap. The length of the pericardial sheet 6 in the circumferential direction of the inner fixing ring 1 is greater than the circumference of the inner fixing ring 1, so that the pericardial sheet 6 can be completely surrounded on the inner fixing ring 1, and the pericardial sheet 6 is prevented from having a gap in the circumferential direction after suturing.

[0044] In some embodiments of the present application, Figure 1-9 As shown, the outer fixing ring 2 includes a first outer ring 21 and a second outer ring 22, the gap 16 of the outer fixing ring 2 is arranged between the first outer ring 21 and the second outer ring 22, the first outer ring 21 and the second outer ring 22 are arranged in an array along the matching direction 26, the first outer ring 21 is arranged on the outer side of the first inner ring 11, and the second outer ring 22 is arranged on the outer side of the second inner ring 12, the first outer ring 21 and the second outer ring 22 are detachably connected, and the outer fixing ring 2 is a non-closed loop; an outer connecting member 23 is arranged between the first outer ring 21 and the second outer ring 22, and the two ends of the outer connecting member 23 are respectively plugged and connected to the first outer ring 21 and the second outer ring 22, the plugging direction of the outer connecting member 23 and the first outer ring 21 is the matching direction 26, and the plugging direction of the outer connecting member 23 and the second outer ring 22 is also the matching direction 26.

[0045] In some embodiments of the present application, Figure 1-9 As shown, the number of the first inner ring 11 is at least one, the number of the second inner ring 12 is at least one; the number of the inner connecting members 13 is at least two, and the inner connecting members 13 are distributed in a circular array around the central axis of the inner fixing ring 1. The number of the first inner ring 11 is at least one, the number of the second outer ring 22 is at least one; the number of the outer connecting members 23 is at least three; thereby ensuring that the second outer ring 22 of the first outer ring 21 can evenly share the external force after being connected by the outer connecting member 23, and also preventing the connection relationship between the first outer ring 21 and the second outer ring 22 from being directly destroyed when a certain outer connecting member 23 is disconnected from the outer fixing ring 2.

[0046] In some embodiments of the present application, Figure 1-9 As shown, there is a gap 16 between the first outer ring 21 and the second outer ring 22, and the length of the gap 16 along the mating direction 26 is at least 2 mm. There is a gap 16 between the first inner ring 11 and the first inner ring 11, and the length of the gap 16 along the mating direction 26 is at least 2 mm.

[0047] The above embodiments are only used to understand the present invention. It should be noted that, for those skilled in the art, several improvements can be made to the present invention without departing from the principles of the present invention, and these improvements will also fall within the scope of protection of the claims of the present invention.

Claims

1. An aortic root suturing auxiliary device, Including, characterized by, including: Internal retaining ring; An outer fixing ring is slidably sleeved on the outside of the inner fixing ring along a matching direction, the outer fixing ring has two movable parts, and an opening is provided between the two movable parts along the matching direction. When the movable parts move in opposite directions, the inner diameter of the outer fixing ring increases, and when the movable parts move in opposite directions, the inner diameter of the outer fixing ring decreases, and the inner diameter of the outer fixing ring is always larger than the outer diameter of the inner fixing ring; a gap is provided between the inner fixing ring and the outer fixing ring along the matching direction; An adjustment plate 1 is connected to one of the movable parts of the outer fixed ring, and a limiting hole is provided through the adjustment plate 1; A second adjusting plate connected to another movable portion of the outer fixing ring, wherein the second adjusting plate is provided with tooth grooves; The adjustment structure includes a connecting shaft, a limiting member and a gear. The limiting member and the gear are both sleeved on the connecting shaft. The connecting shaft passes through the limiting hole and the tooth groove along its own axial direction. The gear is always engaged with the tooth groove. When the connecting shaft moves circumferentially, the two movable parts move relative to each other. When the limiting member is sleeved on the limiting hole, the circumferential movement of the connecting shaft is limited.

2. The aortic root suturing auxiliary device according to claim 1, characterized in that: The adjustment structure also includes an elastic reset member, the elastic reset member and the limiting member are arranged at both ends of the connecting shaft, the other end of the elastic reset member is connected to the adjusting plate 2, the elastic reset member is connected to the adjusting plate 2 and maintains the adjustment structure at an initial position, when the adjustment structure is in the initial position, the limiting member is sleeved on the limiting hole and limits the circumferential movement of the connecting shaft, when the limiting member moves away from the inner fixing ring along the axial direction of the connecting shaft and disengages from the limiting hole, the adjustment structure can rotate circumferentially around the connecting shaft.

3. The aortic root suturing auxiliary device according to claim 1, characterized in that: The inner fixing ring is surrounded by a plurality of inner suture holes, and the outer fixing ring is surrounded by a plurality of outer suture holes. When the outer fixing ring is not subjected to external force, the outer suture holes on the outer fixing ring do not correspond to the inner suture holes on the inner fixing ring.

4. The aortic root suturing auxiliary device according to claim 3, characterized in that: The outer fixing ring is also provided with an outer suture thread passing through the outer suture hole, and the two ends of each of the outer suture thread are respectively connected to the adjustment plate 1 and the adjustment plate 2; the inner fixing ring is also provided with an inner suture thread passing through the inner suture hole, and the two ends of each of the inner suture thread are retained in the inner fixing ring.

5. The aortic root suturing auxiliary device according to claim 4, characterized in that: It also includes a pericardial sheet, which is arranged around the outside of the inner fixing ring. The inner suture thread penetrates the pericardial sheet when passing through the inner suture hole. When the inner suture thread moves toward the central axis of the inner fixing ring, the inner diameter of the pericardial sheet decreases.

6. The aortic root suturing auxiliary device according to claim 1, characterized in that: The inner fixed ring includes a first inner ring and a second inner ring, a gap of the inner fixed ring is arranged between the first inner ring and the second inner ring, the first inner ring and the second inner ring are arranged in an array along the matching direction, the central axis of the first inner ring coincides with the central axis of the second inner ring and the inner diameter of the first inner ring is always the same as the inner diameter of the second inner ring; an inner connecting piece is arranged between the first inner ring and the second inner ring, and two ends of the inner connecting piece are respectively plug-connected to the first inner ring and the second inner ring.

7. The aortic root suturing auxiliary device according to claim 1, characterized in that: The outer fixing ring includes a first outer ring and a second outer ring, a gap of the outer fixing ring is arranged between the first outer ring and the second outer ring, the first outer ring and the second outer ring are arranged in an array along the matching direction, the first outer ring is arranged on the outer side of the first inner ring, the second outer ring is arranged on the outer side of the second inner ring, the first outer ring and the second outer ring are detachably connected, and the outer fixing ring is a non-closed loop; an external connecting piece is arranged between the first outer ring and the second outer ring, and both ends of the external connecting piece are respectively plug-connected to the first outer ring and the second outer ring.

8. The aortic root suturing auxiliary device according to claim 6, characterized in that: The number of the first inner ring is at least one, and the number of the second inner ring is at least one; the number of the inner connecting members is at least two, and the inner connecting members are distributed in a ring array around the central axis of the inner fixed ring.

9. The aortic root suturing auxiliary device according to claim 7, characterized in that: The number of the first inner ring is at least one, the number of the second outer ring is at least one, and the number of the outer connecting members is at least three.

10. The aortic root suturing auxiliary device according to claim 2, characterized in that: One end of the connecting shaft connected to the elastic return member is also provided with an abutment sheet, and the abutment sheet has an abutment end surface, and the abutment end surface is perpendicular to the axial direction of the connecting shaft.

Images