Suturing device

Abstract

The invention relates to the field of medical instruments, in particular to a suturing device which comprises a supporting and recycling system, a first conveying system and a second conveying system, and the supporting and recycling system comprises a supporting and traction structure and a supporting assembly connected with the supporting and traction structure; the first conveying system and the second conveying system are configured to convey the first suturing piece and the second suturing piece to penetrate through the two to-be-closed tissues respectively, and the first suturing piece and the second suturing piece are connected with the supporting traction structure or captured by the supporting traction structure; and the supporting traction structure supports the tissue to be closed when the first conveying system and the second conveying system penetrate through the tissue to be closed.

Description

Technical Field

[0001] The present application relates to the field of medical devices, and in particular to a suturing device. Background Art

[0002] The foramen ovale is a physiological passage of the atrial septum during the embryonic period. The fetus has no pulmonary circulation, and the oxygenated blood from the umbilical cord flows from the right atrium of the fetus through the foramen ovale into the left atrium. After birth, with the establishment of pulmonary circulation, the pressure in the left atrium increases, the secondary septum and the primary septum approach each other, adhere and fuse, and gradually form a permanent atrial septum. However, there are still some people who have not fused, forming a patent foramen ovale (PFO for short). The traditional treatment for patent foramen ovale is surgery. For surgical treatment, patients need to undergo a surgical thoracotomy. The main disadvantages of surgery are: extracorporeal circulation is required during the operation, and the operation may cause complications and lead to death; the surgical operation is traumatic and leaves scars after the operation; the cost of surgery is expensive. With the development and improvement of interventional treatment technology, the method of treating PFO through minimally invasive interventional technology is now very mature. Minimally invasive interventional treatment has the advantages of no surgery, less trauma, fewer complications, faster recovery, better results, a wide range of indications and relatively low surgical costs, but there are more or less problems in use.

[0003] Patent CN202111079433.7 discloses a tissue defect closure device. The puncture needle needs to pass back and forth through the secondary septum and the primary septum tissue. During the back-and-forth puncture, the puncture needle is prone to friction with the secondary septum tissue that has been punctured, thereby expanding the puncture opening and damaging the heart tissue. On the other hand, the heart tissue is not supported during the puncture process, and the diameter of the puncture needle cannot be made very small due to the pre-installed implant. It is difficult for the puncture needle to pass through the secondary septum with a certain thickness. The puncture action is unstable and easily damages the heart tissue. Even if it passes through, a larger puncture opening will be obtained, posing a risk of bleeding.

[0004] Patent US8246636B2 discloses a suture device and method for closing patent foramen ovale. The first suture capture mechanism and the second suture capture mechanism are operated to allow the first suture to pass through the secondary septum tissue and the foramen ovale channel, and the second suture to pass through the primary septum tissue and the foramen ovale channel. The defects of this design are: first, in order to facilitate the capture of the suture, the puncture needle passes through the suture buckle for capture, so that the needle exit angle of the puncture needle and the position of the suture fixed in the tissue are relatively stable, but it is not suitable for all lesions and has poor adjustability; second, in order to ensure that the puncture needle and the heart tissue are as vertical as possible, the angle between the puncture needle and the slender body should be designed to be small, so that the clamp arm supporting the tissue is also designed to be short, resulting in the fixing point of the suture and the secondary septum tissue and the primary septum tissue being closer to the foramen ovale channel, and the tissue at this position is relatively thin and there is a risk of tearing; third, after the suture is completed, at least two strands of thread pass through the foramen ovale channel, the secondary septum end and the primary septum end may be deformed, the shape after suture is uneven, and the lesion surface is convex relative to the left atrial surface, which is not conducive to recovery.

[0005] In summary, the prior art has the following problems that need to be urgently solved: first, the puncture piece does not obtain the corresponding support force when passing through the tissue to be closed; second, the position of the suture piece relative to the tissue to be closed after implantation is relatively fixed, and there are few indications; third, there is a bulge on the surface of the lesion after suturing; fourth, the fixing point of the suture piece is too close to the foramen ovale channel, and the suturing effect is not long-lasting. Summary of the invention

[0006] This application is proposed in view of the above and other more concepts.

[0007] One of the purposes of the present application is to overcome the deficiencies of the prior art and provide a suturing device.

[0008] The object of the present invention is achieved through the following solutions: A suturing device includes a support recovery system, a first conveying system and a second conveying system, the support recovery system includes a support traction structure and a support assembly connected to the support traction structure, the first conveying system and the second conveying system are configured to convey a first suture and a second suture respectively through two pieces of tissue to be closed, the first suture and the second suture are connected to or captured by the support traction structure; and the support traction structure supports the tissue to be closed when the first conveying system and the second conveying system pass through the tissue to be closed.

[0009] The purpose of the present invention can be further achieved by the following technical solutions: Furthermore, the distal ends of the first suture and the second suture are transported outside the body or inside the body by the support recovery system and connected, and the formed connection point is moved to the distal surface of the tissue to be closed by operating the first suture and / or the second suture.

[0010] Furthermore, the support and traction structure is fixedly connected or movably connected to the support assembly; and the movable connection between the two includes coaxial movement of the support and traction structure relative to the support assembly.

[0011] Furthermore, the supporting and traction structure is disc-shaped.

[0012] Furthermore, the supporting and traction structure includes a supporting frame and a connecting member, wherein the connecting member is connected to the supporting frame; and the connecting member restricts the first suture member and the second suture member from being fixed on the supporting and traction structure.

[0013] Furthermore, the support assembly includes a channel adaptor, a pulling member and a clamping member; and the distal end and the proximal end of the channel adaptor are respectively connected to the support frame and the pulling member.

[0014] Further, the proximal end of the channel adapter is connected to the clamping member.

[0015] Furthermore, the distal end of the channel adapter is movably connected to the supporting frame.

[0016] Furthermore, the proximal end of the channel adapter is fixedly connected to the pulling member.

[0017] Furthermore, the distal end of the channel adapter is fixedly connected to the supporting frame.

[0018] Furthermore, the proximal end of the clamping member is movably connected to the channel adapting member, and the clamping member fits with the channel adapting member in a natural state.

[0019] Furthermore, the channel adapter includes a guide rail and a slider, the clamping member is connected to the slider, the clamping member can slide relative to the channel adapter, and the symmetry plane of the clamping member will not move relative to the center line of the channel adapter during sliding.

[0020] Furthermore, the support recovery system also includes an auxiliary control component, and the auxiliary control component is connected to the free end of the clamping component.

[0021] Furthermore, a spring or a torsion spring is provided at the connection position between the proximal end of the clamping member and the channel adapting member.

[0022] Furthermore, when the first puncture tube punctures the secondary septal tissue, the clamp is located at the proximal surface of the secondary septal tissue, and the clamp cooperates with the support frame to fix the secondary septal tissue.

[0023] Furthermore, the clamping member clamps the primary septal tissue.

[0024] Furthermore, the length of the channel adaptor is A, the length of the clamping member is B, and the length relationship between the two is A=(1 / 3~2)B.

[0025] Furthermore, the auxiliary control member is a thin wire or a thin rope.

[0026] Furthermore, the first delivery system and the second delivery system include a first puncture tube and a second puncture tube, and the first suture piece and the second suture piece are pre-installed in the first puncture tube and the second puncture tube.

[0027] Furthermore, a connecting portion is respectively provided at a distal end of the first suture piece and a distal end of the second suture piece.

[0028] Furthermore, the connecting portion has a preset shape, and the connecting portion is connected to the connecting member and / or the supporting frame after being released.

[0029] Furthermore, the connecting portion is in a hook shape or an anchor shape in a natural state.

[0030] Furthermore, the connecting member is a membrane connected to the supporting frame.

[0031] Furthermore, the membrane can be punctured by the first puncture tube and the second puncture tube. Furthermore, the size of the connecting portion is larger than the diameter of the first suture piece / the second suture piece, and the connecting portion is captured by the connecting piece after being released.

[0032] Further, the connecting member is configured to capture the structure of the distal ends of the first suture member and the second suture member.

[0033] Furthermore, the connecting member includes a capturing device, the capturing device includes a slot, and the engaging portion is fixed in the slot.

[0034] Furthermore, the connecting member is arranged on the distal end surface of the supporting frame.

[0035] Furthermore, the connecting portion is magnetic, and the connecting piece is a magnetic element, and the two are connected through the principle of magnetic attraction.

[0036] Furthermore, the support frame and the membrane form a plurality of anchoring regions, and the first puncture tube and the second puncture tube can move the distal end portion of the first suture piece and the distal end portion of the second suture piece to the left atrium by piercing the anchoring regions.

[0037] Further, the connection point is formed by knotting, welding or bonding, and the distal end of the first suture is fixed to the distal end of the second suture; and, by pulling the first suture and / or the second suture, the connection point moves to the distal surface of the tissue to be closed, i.e., the left atrial surface of the foramen ovale.

[0038] Furthermore, the first suture is continuously pulled, and the connection point passes through the septum secundum tissue from the left atrial surface to the right atrial surface.

[0039] Furthermore, the second suture is continuously pulled, and the fixing member passes through the primary septum tissue from the left atrial surface to the right atrial surface.

[0040] Further, the first delivery system includes one or more first sutures, and the second delivery system includes one or more second sutures.

[0041] Furthermore, the connection points are formed in one or more forms.

[0042] Further, the connection point is a fixed knot obtained by directly knotting the distal end portion of the first suture piece and the distal end portion of the second suture piece.

[0043] Furthermore, it also includes a proximal locking system, which includes a locking structure and a cutting structure; and the locking structure is used to fix the first suture and / or the second suture located on the proximal surface of the tissue to be closed, thereby realizing the proximal connection of the first suture and the second suture, and finally forming a segmented combined connection between the first suture and the second suture.

[0044] Further, the cutting structure shears the first suture portion and / or the second suture portion located at the proximal end of the locking structure.

[0045] Furthermore, the locking structure fixes the plurality of first suture members and the plurality of second suture members together.

[0046] Furthermore, the support recovery system includes a recovery outer sheath. After the recovery outer sheath is withdrawn, the first delivery system and the second delivery system enter the right atrial cavity of the heart. After the first suture and the second suture are connected to the support traction structure, the first delivery system and the second delivery system are withdrawn, and the recovery outer sheath is then introduced to pull the support assembly to recover the support traction structure.

[0047] Furthermore, the first conveying system comprises a clamping structure, wherein the clamping structure and the supporting and traction structure are respectively arranged on the proximal surface and the distal surface of the tissue to be closed; and the clamping structure is connected to the first puncture tube.

[0048] Furthermore, it also includes a protection system, which is at least partially arranged in the foramen ovale channel of the heart; and the protection system includes a protection groove, and the first suture piece and the second suture piece are in contact with the protection groove during the process of moving from the tissue to be closed to the outside of the body.

[0049] Furthermore, the support recovery system comprises a recovery outer sheath tube, and the support traction structure and the support assembly are pre-installed in the recovery outer sheath tube.

[0050] Furthermore, the retrieval outer sheath is operated to release the support traction structure and the support assembly. After the release, the retrieval outer sheath is withdrawn, and the first delivery system and the second delivery system enter the heart together or separately.

[0051] Furthermore, the first puncture tube is operated to transport the first suture piece through the secondary septal tissue, and the connecting portion is connected to the supporting traction structure.

[0052] Furthermore, the first suture piece and the second suture piece are connected to the supporting and traction structure simultaneously or step by step.

[0053] Furthermore, after the first suture piece and the second suture piece are connected to the support and traction structure, the first puncture tube and the second puncture tube are withdrawn; and, the recovery outer sheath is operated to enter the right atrium, and the support assembly is pulled to recover the support and traction structure, and the support and traction structure brings the distal ends of the first suture piece and the second suture piece into the recovery outer sheath; the distal ends of the first suture piece and the second suture piece are moved outside the body, and the operator knots them; then, the proximal ends of the first suture piece and the second suture piece are pulled, and the connection point moves to the left atrial surface.

[0054] Compared with the prior art, the advantages of the technical solution of the present application include at least the following: 1. In the prior art, the puncture needle and the clamp arm of the supporting tissue are designed in one system. In order to ensure the mutual cooperation between the two, there are many restrictions, such as: the clamp arm fits the oval foramen tissue when providing support force, and the puncture needle should be as perpendicular to the oval foramen tissue as possible during the puncture action. In addition, since the puncture needle and the clamp arm are connected to the slender body, coupled with space limitations, the angle between the puncture needle and the slender body is designed to be small, and the length of the clamp arm is short, resulting in the connection point between the suture line and the oval foramen tissue being too close to the oval foramen channel. Connecting here can easily lead to two results: first, since the heart tissue at this location is relatively thin, it is easy to be torn and deformed by the suture line, and the suture effect is not long-lasting; second, the secondary septum end and the primary septum end may be deformed, the shape after suturing is uneven, and the lesion surface is convex relative to the atrial surface; the present application avoids The above problems are avoided. Firstly, the first suture and the second suture that complete the suturing step only pass through the secondary septum tissue and the primary septum tissue. Although the connection point will pass through the foramen ovale channel, it will finally be located on the left atrial surface. Therefore, the first suture and the second suture will not cause the secondary septum end and the primary septum end to be deformed. There is no implant in the foramen ovale channel, and the lesion is smooth without any protrusion. Secondly, the present application provides a supporting traction structure, and the supporting traction structure is disc-shaped. Therefore, as long as the puncture point is in the disc, the puncture tube can successfully complete the puncture. Therefore, the puncture points of the first suture and the second suture can act on the middle position between the secondary septum tissue and the primary septum tissue, reducing the risk of tearing the heart tissue. The suturing effect is good and the stability is strong. At the same time, the puncture point is highly optional and can adapt to different foramen ovale tissues.

[0055] 2. Different from the prior art, the support and traction structure of the present application includes a support frame and a connector. The support frame is radially divergent, which is convenient for recovery into the outer sheath. The connector is a structure for capturing the connecting part. Since the support and traction structure is released after passing through the oval foramen channel and will also pass through the oval foramen channel when recovered, the distal ends of the first and second sutures will move to the oval foramen channel with the support and traction structure, and then move to somewhere outside the body or inside the body along the access path of the support recovery system to complete the knotting. On the other hand, the size of the puncture holes on the secondary septal tissue and the primary septal tissue is comparable to that of the puncture tube, so the first suture and the second suture move in the puncture hole with little damage to the tissue.

[0056] 3. Different from the prior art, the supporting traction structure is disc-shaped, and the connecting piece is a membrane connected to the supporting frame. The membrane and the supporting frame form a number of anchoring areas. Therefore, when the operator performs the puncture, the puncture of the first puncture tube and the second puncture tube only needs to be within the disc surface. Therefore, the specific position of the puncture point is highly optional. The puncture point can be set in the middle part of the secondary septum tissue, where the tissue thickness is not so thin, it is more stable as a fixed point, and the suturing effect is good.

[0057] 4. Different from the prior art, the first delivery system can be loaded with multiple first puncture tubes, thereby enabling puncture in different anchoring areas. The supporting traction structure can capture the connecting parts of multiple first suture pieces. Similarly, the supporting traction structure can capture the connecting parts of multiple second suture pieces. The operator can tie one knot or multiple knots according to the condition of the patient's lesion, which is more humane. After suturing, the occlusion effect of the foramen ovale is better, thereby solving the problem of large residual shunts in the prior art.

[0058] 5. Different from the prior art, the support and traction structure of the present application supports the tissue to be closed when the first delivery system and the second delivery system pass through the tissue to be closed, that is, the support frame of the support and traction structure is against the oval foramen tissue at the left atrial surface of the oval foramen, and the first delivery system and the second delivery system are supported by the other side when puncturing the right atrial surface, so the puncture action can be carried out smoothly; and, because the support and traction structure is used to capture the first suture and the second suture, the support and traction structure has two functions, and is finally withdrawn from the body, which will not increase the metal content of the implant, and the design concept is ingenious.

[0059] The embodiments of the present application can achieve other advantageous technical effects that are not listed one by one, and these other technical effects may be partially described below; and are predictable and understandable to those skilled in the art after reading this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] The above features and advantages of these embodiments and other features and advantages and the manner in which they are achieved will become more apparent and the embodiments of the present application can be better understood by referring to the following description together with the accompanying drawings, in which: Figure 1 to Figure 14 It is a schematic diagram of the process of the support recovery system, the first delivery system, the second delivery system and the proximal locking system of the present invention cooperating with each other to complete the suturing process.

[0061] Fig.15 and Fig.16 This is an implementation manner of the capturing and engaging portion of the connector of the present invention.

[0062] Fig.17 This is an implementation mode of the connecting portion of the present invention.

[0063] Fig.18 This is an implementation method of forming two connection points for the present invention.

[0064] The features indicated by the numbers in the accompanying drawings are as follows: 1-support recovery system, 11-recovery outer sheath, 12-auxiliary control part, 2-support traction structure, 21-support skeleton, 22-connecting part, 2201-capture device, 2202-card slot, 2203-membrane, 3-support component, 31-channel adapter, 311-guide rail, 312-slider, 32-pulling member, 33-clamping member, 4-first conveying system, 41-first suture member, 42-first puncture tube, 5-second conveying system, 51-second suture member, 52-second puncture tube, 6-connecting part, 7-connecting point, 8-proximal locking system, 81-locking structure, 82-resection structure. Implementation

[0065] In the following description of the drawings and specific embodiments, the details of one or more embodiments of the present application will be described. From these descriptions, drawings and claims, other features, purposes and advantages of the present application can be clearly seen.

[0066] It should be understood that the phrases and terms used herein are for descriptive purposes and should not be considered restrictive. The use of "include", "comprises", or "having" and variations thereof herein is intended to be open-ended to include the items listed thereafter and their equivalents and additional items.

[0067] The present application will be described in more detail below with reference to different embodiments and examples of several aspects of the present application.

[0068] In the present application, the term “proximal end” or “proximal side” refers to an end or a side closer to a surgical operator, and the term “distal end” or “distal side” refers to an end or a side farther from a surgical operator.

[0069] In the prior art, there are problems such as limited selection of puncture positions and uneven protrusions at the suture sites between the secondary septum end and the primary septum end.

[0070] One of the purposes of the embodiments described below is to address the above-mentioned deficiencies, as well as other problems. Example

[0071] like Figures 1 to 14 As shown, a suturing device is illustrated, including a support recovery system 1, a first conveying system 4 and a second conveying system 5, the support recovery system 1 includes a support traction structure 2 and a support component 3 connected to the support traction structure 2, the first conveying system 4 and the second conveying system 5 are configured to convey a first suture 41 and a second suture 51 respectively through two pieces of tissue to be closed, the first suture 41 and the second suture 51 are connected to the support traction structure 2 or captured by the support traction structure 2; and, the support traction structure 2 supports the foramen ovale tissue when the first conveying system 4 and the second conveying system 5 pass through the foramen ovale tissue.

[0072] In the first embodiment, the distal ends of the first suture piece 41 and the second suture piece 51 are transported outside the body by the support recovery system 1 to form a connection point 7, and the connection point 7 is moved to the distal surface of the tissue to be closed by operating the first suture piece 41 and / or the second suture piece 51.

[0073] In the first embodiment, the support and traction structure 2 includes a support frame 21 and a connecting member 22 , wherein the connecting member 22 is connected to the support frame 21 ; and the connecting member 22 restricts the first stitching member 41 and the second stitching member 51 from being fixed to the support and traction structure 2 .

[0074] In the first embodiment, the support assembly 3 includes a channel adaptor 31, a puller 32 and a clamp 33; and the distal end and the proximal end of the channel adaptor 31 are connected to the support frame 21 and the puller 32, respectively. Figure 3 shown.

[0075] In the first embodiment, the distal end of the channel adaptor 31 is movably connected to the support frame 21 ; the proximal end of the channel adaptor 31 is fixedly connected to the pulling member 32 .

[0076] In the first embodiment, the support frame 21 supports the left atrial surface of the foramen ovale tissue when the first puncture tube 42 and the second puncture tube 52 pass through the septum secundum and the septum primum.

[0077] In the first embodiment, the channel adaptor 31 includes a guide rail 311 and a slider 312. Figure 3 As shown, the clamping member 33 is connected to the sliding block 312 , and the clamping member 33 can slide relative to the channel adapting member 31 .

[0078] In the first embodiment, the symmetric surface of the clamping member 33 will not move relative to the channel adapting member 31 during the sliding process.

[0079] In the first embodiment, the support recovery system 1 further includes an auxiliary control component 12 , and the auxiliary control component 12 is connected to the free end of the clamping component 33 .

[0080] In the first embodiment, a spring or a torsion spring is provided at the connection position between the proximal end of the clamping member 33 and the channel adapting member 31 .

[0081] In the first embodiment, when the first puncture tube 42 punctures the secondary septal tissue, the clamp 33 is located at the proximal surface of the secondary septal tissue, and the clamp 33 cooperates with the support frame 21 to fix the secondary septal tissue.

[0082] In the first embodiment, the length of the channel adaptor 31 is A, the length of the clamping member 33 is B, and the length relationship between the two is A=(1 / 3-2)B.

[0083] In the first embodiment, the auxiliary control member 12 is a metal wire.

[0084] In the first embodiment, the first delivery system 4 and the second delivery system 5 include a first puncture tube 42 and a second puncture tube 52 , and the first suture piece 41 and the second suture piece 51 are pre-installed in the first puncture tube 42 and the second puncture tube 52 .

[0085] In the first embodiment, the distal ends of the first suture piece 41 and the distal ends of the second suture piece 51 are respectively provided with a connecting portion 6 .

[0086] In the first embodiment, the size of the connecting portion 6 is larger than the diameter of the first suture piece 41 / the second suture piece 51 , and the connecting portion 6 is captured by the connecting piece 22 after being released.

[0087] In the first embodiment, the connecting member 22 includes a capture device 2201, the capture device 2201 includes a slot 2202, and the connecting portion 6 is fixed in the slot 2202. Fig.15 and 16 shown.

[0088] In the first embodiment, the capture device 2201 can be pulled to the center of the support frame 21 .

[0089] In the first embodiment, the connection point 7 is formed by knotting, welding or bonding, and the distal end of the first suture 41 is fixed to the distal end of the second suture 51; and, by pulling the first suture 41 and / or the second suture 51, the connection point 7 moves to the distal surface of the tissue to be closed, that is, the left atrial surface of the foramen ovale.

[0090] In the first embodiment, the connection point 7 forms one.

[0091] In the first embodiment, a proximal locking system 8 is also included, and the proximal locking system 8 includes a locking structure 81 and a cutting structure 82; and the locking structure 81 is used to fix the first suture 41 and / or the second suture 51 located at the proximal surface of the tissue to be closed, and the cutting structure 82 shears the first suture 41 part and / or the second suture 51 part located at the proximal end of the locking structure 81.

[0092] In the first embodiment of the present invention, the support recovery system 1 includes a recovery outer sheath 11. After the recovery outer sheath 11 is withdrawn, the first conveying system 4 and the second conveying system 5 enter the heart. After the first suture 41 and the second suture 51 are connected to the support traction structure 2, the first conveying system 4 and the second conveying system 5 are withdrawn, and then the recovery outer sheath 11 is introduced to pull the support assembly 3 to recover the support traction structure 2.

[0093] In the first embodiment, a protection system is further included, wherein the protection system is at least partially disposed in the oval foramen channel; and the protection system includes a protection groove, and the first suture piece 41 and the second suture piece 51 are in contact with the protection groove during the process of moving from the tissue to be closed to the outside of the body.

[0094] The exemplary operation process of the closed system of the first embodiment is as follows: (1) The support and retrieval system 1 enters the right atrium through the femoral vein, and then moves to the position of the patent foramen ovale between the secondary septum and the primary septum near the atrial septum, such as Figure 1 As shown; (2) releasing the support and traction structure 2 to fit the left atrial surface, and retrieving the outer sheath 11, as shown in FIG. Figure 2 As shown; (3) Operate the first delivery system 4 to enter the heart, such as Figure 3 As shown, then, the auxiliary control member 12 is operated to make the clamping member 33 clamp the secondary septum tissue, as shown in FIG. Figure 4 As shown, the first puncture tube 42 is operated to perform puncture, as shown in FIG. Figure 5 As shown, the connecting member 22 captures the connecting portion 6 of the first suture member 41, as shown in FIG. Figure 6 and 16 As shown, the first puncture tube 42 is withdrawn; (4) Operate the second delivery system 5 to enter the heart, such as Figure 7 As shown, the second puncture tube 52 is operated to perform puncture, as shown in FIG. Figure 8 As shown, the connecting member 22 captures the connecting portion 6 of the second suture member 51 and withdraws the second puncture tube 52; (5) The outer sheath tube 11 is operated to enter the right atrium, and the support assembly 3 is pulled to retract the support traction structure 2. The support traction structure 2 brings the distal ends of the first suture piece 41 and the second suture piece 51 into the outer sheath tube 11. Fig. 9 and Fig.10 The distal end of the first suture member 41 and the distal end of the second suture member 51 are moved outside the body, and the surgeon ties a knot, such as Fig.11 As shown; (6) Pull the proximal ends of the first suture piece 41 and the second suture piece 51, and the connection point 7 moves to the left atrial surface, as shown in FIG. Fig.11 and 12 As shown; (7) The locking structure 81 covers the proximal end of the first suture piece 41 and the second suture piece 51, and enters the right atrium along the first suture piece 41 and the second suture piece 51. Fig.13 then operate the resection structure 82, cutting the locking structure 81 proximal portion of the first suture member 41 and the second suture member 51, as Fig.14 As shown, suturing is completed. Example

[0095] The difference from the first embodiment is that: In the second embodiment, the connecting portion 6 has a preset shape, the connecting member 22 is a membrane 2203 ; and the connecting point 7 is formed in plurality.

[0096] The composition and connection mode of each component in this embodiment will be described in detail below with reference to the accompanying drawings: In the second embodiment, a suturing device is disclosed, including a support recovery system 1, a first conveying system 4 and a second conveying system 5, the support recovery system 1 includes a support traction structure 2 and a support assembly 3 connected to the support traction structure 2, the first conveying system 4 and the second conveying system 5 are configured to convey a first suture 41 and a second suture 51 respectively through two pieces of tissue to be closed, the first suture 41 and the second suture 51 are connected to the support traction structure 2 or captured by the support traction structure 2; and, the support traction structure 2 supports the tissue to be closed when the first conveying system 4 and the second conveying system 5 pass through the tissue to be closed.

[0097] In the second embodiment, the distal ends of the first suture piece 41 and the second suture piece 51 are transported outside the body by the support recovery system 1 to form a connection point 7, and the connection point 7 is moved to the distal surface of the tissue to be closed by operating the first suture piece 41 and / or the second suture piece 51.

[0098] In the second embodiment, the connecting portion 6 has a preset shape, and the connecting portion 6 is connected to the connecting member 22 and / or the supporting frame 21 after being released.

[0099] In the second embodiment, the connecting portion 6 is in a hook shape or an anchor shape in a natural state. Fig.17 shown.

[0100] In the second embodiment, the connecting member 22 is a membrane 2203 connected to the supporting frame 21 .

[0101] In the second embodiment, the support frame 21 and the membrane 2203 form a plurality of anchoring areas, and the first puncture tube 42 and the second puncture tube 52 can move the distal end portion of the first suture piece 41 and the distal end portion of the second suture piece 51 to the left atrium by piercing the anchoring areas.

[0102] In the second embodiment, the first delivery system 4 includes two first puncture tubes 42, the second delivery system 5 includes two second puncture tubes 52, and the two first suture pieces 41 and the two second suture pieces 51 form two connection points 7, such as Fig.18 shown.

[0103] In the second embodiment, the first conveying system 4 includes a clamping structure, and the clamping structure and the supporting and traction structure 2 are respectively arranged on the proximal and distal surfaces of the tissue to be closed; and the clamping structure is connected to the first puncture tube 42.

[0104] In this regard, the relevant structure and concept of the second embodiment are similar to those of the first embodiment, and thus will not be described again here.

[0105] The foregoing description of several embodiments of the present application is presented for illustrative purposes. The foregoing description is not intended to be exhaustive, nor is it intended to limit the present application to the precise configurations, constructions and / or steps disclosed, and it is apparent that many modifications and variations may be made in light of the teachings above. The scope of the present invention and all equivalents are intended to be defined by the appended claims.

Claims

1. A suturing device, characterized in that: The invention comprises a support recovery system, a first conveying system and a second conveying system, wherein the support recovery system comprises a support traction structure and a support assembly connected to the support traction structure, wherein the first conveying system and the second conveying system are configured to convey a first suture and a second suture respectively through two pieces of tissue to be closed, wherein the first suture and the second suture are connected to or captured by the support traction structure; and the support traction structure supports the tissue to be closed when the first conveying system and the second conveying system pass through the tissue to be closed.

2. The suturing device according to claim 1, characterized in that: The distal ends of the first suture and the second suture are transported outside the body or inside the body by the support and recovery system and connected, and the formed connection point is moved to the distal surface of the tissue to be closed by operating the first suture and / or the second suture.

3. The suturing device according to claim 1, characterized in that: The support and traction structure is fixedly connected or movably connected to the support assembly; and the movable connection between the two includes coaxial movement of the support and traction structure relative to the support assembly.

4. The suturing device according to claim 1, characterized in that: The support and traction structure includes a support frame and a connecting member, wherein the connecting member is connected to the support frame; and the support and traction structure is disc-shaped, and the connecting member restricts the first suture member and the second suture member from being fixed on the support and traction structure.

5. The suturing device according to claim 1, characterized in that: The support assembly includes a channel adapter, a pulling member and a clamping member; and the distal end and proximal end of the channel adapter are respectively connected to the support frame and the pulling member, and the proximal end of the channel adapter is connected to the clamping member.

6. The suturing device according to claim 5, characterized in that: The proximal end of the clamping member is movably connected to the channel adaptor, and the clamping member fits with the channel adaptor in a natural state; and the support recovery system also includes an auxiliary control member, which is connected to the free end of the clamping member.

7. The suturing device according to claim 1, characterized in that: The first delivery system and the second delivery system include a first puncture tube and a second puncture tube, the first suture piece and the second suture piece are pre-installed in the first puncture tube and the second puncture tube, and the distal ends of the first suture piece and the second suture piece are respectively provided with a connecting portion.

8. The suturing device according to claim 7, characterized in that: The connecting portion has a preset shape, and the connecting portion is connected to the connecting member and / or the supporting frame after being released; Alternatively, the size of the engaging portion is larger than the diameter of the first suture piece / the second suture piece, and the engaging portion is captured by the connecting piece after being released.

9. The suturing device according to claim 7, characterized in that: The connecting member is a membrane connected to the supporting frame, and the membrane can be punctured by the first puncture tube and the second puncture tube; or, the connecting member is constructed as a structure that captures the distal ends of the first suture member and the second suture member.

10. The suturing device according to claim 2, characterized in that: The connection point is formed by knotting, welding or bonding, and the distal end of the first suture is fixed to the distal end of the second suture; and, by pulling the first suture and / or the second suture, the connection point moves to the distal surface of the tissue to be closed.

11. The suturing device according to claim 2, characterized in that: The first delivery system includes one or more first sutures, the second delivery system includes one or more second sutures; and the connection points are formed in one or more.

12. The suturing device according to claim 1, characterized in that: The support recovery system includes a recovery outer sheath. After the recovery outer sheath is withdrawn, the first delivery system and the second delivery system enter the right atrial cavity of the heart. After the first suture and the second suture are connected to the support traction structure, the first delivery system and the second delivery system are withdrawn, and the recovery outer sheath is then introduced to pull the support assembly to recover the support traction structure.

13. The suturing device according to claim 7, characterized in that: The first conveying system comprises a clamping structure, wherein the clamping structure and the supporting and traction structure are respectively arranged on the proximal surface and the distal surface of the tissue to be closed; and the clamping structure is connected to the first puncture tube.

14. The suturing device according to claim 1, characterized in that: It also includes a protection system, which is at least partially arranged in the heart's oval foramen channel; and the protection system includes a protection groove, and the first suture piece and the second suture piece are in contact with the protection groove during the process of moving from the tissue to be closed to the outside of the body.

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