A suturing device

Abstract

The present application relates to the field of medical devices, and more particularly to a suturing device including a support and retrieval system, a first delivery system and a second delivery system, the support and retrieval system including a support and traction structure and a support assembly connected to the support and traction structure, the first and second delivery systems configured to deliver first and second suturing members through two pieces of tissue to be closed, the first and second suturing members connected to or captured by the support and traction structure, and the support and traction structure supporting the tissue to be closed as the first and second delivery systems are passed 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 passageway in the atrial septum during the embryonic period. The fetus lacks pulmonary circulation, so oxygenated blood from the umbilical cord flows from the right atrium through the foramen ovale into the left atrium. After birth, as pulmonary circulation establishes, left atrial pressure increases, and the septum secundum and septum primum converge, fuse, and eventually form a permanent atrial septum. However, in some cases, this fusion still occurs, resulting in a patent foramen ovale (PFO). Traditionally, surgical treatment for a PFO is surgical. Surgical treatment requires a thoracotomy. The main disadvantages of surgery are: the need for extracorporeal circulation, the potential for complications and death, the high trauma and scarring, and the high cost. With the advancement of interventional technology, minimally invasive techniques for treating PFO have become highly established. Minimally invasive interventions offer advantages such as no surgery, minimal trauma, fewer complications, faster recovery, better results, a wide range of indications, and relatively low costs. However, these procedures often present challenges.

[0003] Patent CN202111079433.7 discloses a device for closing tissue defects. The puncture needle needs to pass back and forth through the secondary septum and primary septum tissue. During the back-and-forth puncture process, 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, and there is a risk of bleeding.

[0004] US Patent No. 8246636B2 discloses a suture device and method for closing a patent foramen ovale. By operating a first suture capture mechanism and a second suture capture mechanism, the first suture is passed through the septum secundum tissue and the foramen ovale passage, and the second suture is passed through the septum primum tissue and the foramen ovale passage. This design has the following drawbacks: first, to facilitate suture capture, the puncture needle is passed through a suture buckle for capture. As a result, the needle exit angle and the position of the suture fixed in the tissue are relatively stable, but are not suitable for all lesions and have poor adjustability. Second, to ensure that the puncture needle and the cardiac tissue are as perpendicular as possible, the angle between the puncture needle and the slender body must be designed to be small, resulting in a short clamping arm supporting the tissue. This results in the suture fixing point between the septum secundum tissue and the septum primum tissue being relatively close to the foramen ovale passage, where the tissue is relatively thin and there is a risk of tearing. Third, after the suture is completed, at least two strands of suture pass through the foramen ovale passage, and the ends of the septum secundum and the septum primum may be deformed, resulting in an uneven shape after suture, and a bulge on the lesion surface relative to the left atrial surface, which is not conducive to recovery.

[0005] In summary, the existing technology has the following problems that urgently need to be solved: first, the puncture piece does not receive 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 the indications are limited; third, there is a bulge on the surface of the lesion after the suturing is completed; 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:

[0009] A suturing device includes a support and recovery system, a first conveying system and a second conveying system, the support and recovery system includes a support and traction structure and a support assembly connected to the support and 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 the support and traction structure or captured by the support and traction structure; and the support and 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.

[0010] The purpose of the present invention can be further achieved by the following technical solutions:

[0011] Furthermore, 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.

[0012] Furthermore, the support and traction structure is fixedly connected or movably connected to the support assembly; and the movably connected manner between the two includes the support and traction structure moving coaxially relative to the support assembly.

[0013] Furthermore, the supporting and traction structure is disc-shaped.

[0014] Furthermore, 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 connecting member restricts the first suture member and the second suture member from being fixed on the support and traction structure.

[0015] Furthermore, 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.

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

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

[0018] Furthermore, the proximal end of the channel adapter is fixedly connected to the pulling member.

[0019] Furthermore, the distal end of the channel adapter is fixedly connected to the support frame.

[0020] 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.

[0021] 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 the sliding process.

[0022] Furthermore, the support recovery system further includes an auxiliary control component, and the auxiliary control component is connected to the free end of the clamping component.

[0023] Furthermore, a spring or a torsion spring is provided at the connection position between the proximal end of the clamping member and the channel adaptor.

[0024] Furthermore, when the first puncture tube punctures the secondary septal tissue, the clamping member is located at the proximal end surface of the secondary septal tissue, and the clamping member cooperates with the supporting frame to fix the secondary septal tissue.

[0025] Furthermore, the clamping member clamps the primary septal tissue.

[0026] 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.

[0027] Furthermore, the auxiliary control member is a thin wire or a thin rope.

[0028] 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.

[0029] Furthermore, the distal ends of the first suture piece and the second suture piece are respectively provided with connecting portions.

[0030] 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.

[0031] Furthermore, the connecting portion is hook-shaped or anchor-shaped in a natural state.

[0032] Furthermore, the connecting member is a membrane connected to the supporting frame.

[0033] Furthermore, the membrane can be punctured by the first puncture tube and the second puncture tube

[0034] 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.

[0035] Furthermore, the connecting member is configured to capture the structure of the distal ends of the first suture member and the second suture member.

[0036] Furthermore, the connecting member includes a capturing device, the capturing device includes a slot, and the connecting portion is fixed in the slot.

[0037] Furthermore, the connecting member is arranged on the distal end surface of the supporting frame.

[0038] 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.

[0039] Furthermore, the support frame and the membrane form a plurality of anchoring areas, 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 areas.

[0040] Furthermore, 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, that is, the left atrial surface of the foramen ovale.

[0041] 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.

[0042] 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.

[0043] Furthermore, the first delivery system includes one or more first sutures, and the second delivery system includes one or more second sutures.

[0044] Furthermore, the connection points are formed into one or more.

[0045] Furthermore, the connection point is a fixed knot obtained by directly tying the distal end portion of the first suture piece and the distal end portion of the second suture piece.

[0046] 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 of the first suture and the second suture.

[0047] Furthermore, the cutting structure shears the first suture portion and / or the second suture portion located proximal to the locking structure.

[0048] Furthermore, the locking structure fixes the plurality of first suture members and the plurality of second suture members together.

[0049] Furthermore, the support recovery system includes a recovery outer sheath. After the recovery outer sheath is withdrawn, the first conveying system and the second conveying 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 conveying system and the second conveying system are withdrawn, and the recovery outer sheath is introduced again to pull the support assembly to recover the support traction structure.

[0050] Furthermore, the first conveying system includes a clamping structure, wherein the clamping structure and the supporting and traction structure 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.

[0051] 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.

[0052] Furthermore, the support recovery system includes a recovery outer sheath tube, and the support traction structure and the support assembly are pre-installed in the recovery outer sheath tube.

[0053] 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.

[0054] Furthermore, the first puncture tube is operated to transport the first suture piece through the secondary septum tissue, and the connecting portion is connected to the supporting and traction structure.

[0055] Furthermore, the first suture piece and the second suture piece are connected to the supporting and traction structure simultaneously or step by step.

[0056] 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 carries 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 ties a knot; 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.

[0057] Compared with the prior art, the advantages of the technical solution of this application include at least the following:

[0058] 1. In the prior art, the puncture needle and the clamping arm supporting the tissue are designed in one system, and there are many restrictions to ensure the cooperation of the two, such as: the clamping arm provides support force to fit the oval hole tissue, the puncture needle performs puncture action as much as possible perpendicular to the oval hole tissue, and due to the connection of the puncture needle and the clamping arm with the slender main body, plus the space limitation, the angle between the puncture needle and the slender main body is designed to be small, and the length of the clamping arm is small, which causes the connection point of the suture and the oval hole tissue to be too close to the oval hole passage. The connection at this point can easily lead to two results: 1. The heart tissue at this point is relatively thin, which is easy to be torn and deformed by the suture, and the suture effect is not durable. 2. The secondary septum end and the primary septum end may be deformed, and the shape after suture is not flat, and the surface of the lesion is protruding relative to the atrial surface. The present application avoids the above problems. First, the first suture member and the second suture member only pass through the secondary septum tissue and the primary septum tissue after completing the suture step. The connection point will pass through the oval hole passage, but will finally be located on the left atrial surface. Therefore, the first suture member and the second suture member will not cause the secondary septum end and the primary septum end to be deformed, and there is no implant in the oval hole passage, and the lesion is smooth and will not have a protrusion.

[0059] 2. Different from the prior art, the support traction structure of the present application includes a support framework and a connecting member. The support framework is in a radial divergent shape, which is convenient for recycling into the outer sheath tube. The connecting member is a structure for capturing the connection part. Since the support traction structure is released after passing through the oval hole passage, it will also pass through the oval hole passage during recycling. Therefore, the distal end part of the first suture member and the second suture member will move to the oval hole passage with the support traction structure, and then move to a certain place in or out of the body along the access path of the support recovery system to complete knotting. On the other hand, the puncture hole on the secondary septum tissue and the primary septum tissue is of a size comparable to the puncture tube. Therefore, the first suture member and the second suture member have little damage to the tissue when moving in the puncture hole.

[0060] 3. Different from the prior art, the support traction structure is in a disc shape, and the connecting member is a film connected with the support framework. The film and the support framework form a plurality of anchoring areas. Therefore, when the operator performs the puncture action, the puncture of the first puncture tube and the second puncture tube is only in the disc surface. Therefore, the specific position of the puncture point is highly selectable, and the puncture point can be arranged at the middle part of the secondary septum tissue. The thickness of the tissue at this point is not so thin, and it is relatively stable as a fixed point, and the suture effect is good.

[0061] 4. Different from the existing technology, the first delivery system can be loaded with multiple first puncture tubes, thereby allowing puncture in different anchoring areas. The support and traction structure can capture the connecting parts of multiple first suture pieces. Similarly, the support and traction structure can capture the connecting parts of multiple second suture pieces. The surgeon 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 existing technology.

[0062] 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 abuts against the foramen ovale tissue on the left atrial surface of the foramen ovale, and the first delivery system and the second delivery system are supported from the other side when puncturing the right atrial surface, so that 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 outside the body, which will not increase the metal content of the implant, and the design concept is ingenious.

[0063] The embodiments of the present application can achieve other advantageous technical effects that are not listed one by one. These other technical effects may be partially described below; and they can be anticipated and understood by those skilled in the art after reading this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] 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 in conjunction with the accompanying drawings, in which:

[0065] Figures 1 to 14 This is a schematic diagram of the process in which the support recovery system, the first delivery system, the second delivery system, and the proximal locking system cooperate with each other to complete suturing.

[0066] Figure 15 and Figure 16 This is an embodiment of the capturing and engaging portion of the connector of the present invention.

[0067] Figure 17 This is an implementation method of the connecting portion of the present invention.

[0068] Figure 18 This is an implementation method of forming two connection points in the present invention.

[0069] The features indicated by the numbers in the accompanying drawings are as follows:

[0070] 1-support and recovery system, 11-recovery outer sheath, 12-auxiliary control component, 2-support and traction structure, 21-support skeleton, 22-connecting component, 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-connection point, 8-proximal locking system, 81-locking structure, 82-resection structure. Implementation Method

[0071] In the following description of the drawings and specific embodiments, details of one or more embodiments of the present application will be described. Other features, purposes and advantages of the present application will be clear from these descriptions, drawings and claims.

[0072] It should be understood that the phrases and terms used herein are for descriptive purposes only and should not be considered restrictive. The use of "include," "comprise," or "have" and variations thereof herein is intended to encompass the items listed thereafter and their equivalents as well as additional items.

[0073] The present application will be described in more detail below with reference to different embodiments and examples of several aspects of the application.

[0074] In the present application, the term “proximal end” or “proximal side” refers to an end or side closer to a surgical operator, and “distal end” or “distal side” refers to an end or side farther from a surgical operator.

[0075] In the prior art, there are problems such as limited selection of puncture positions and uneven protrusions at the suture site between the secondary septum end and the primary septum end.

[0076] One purpose of the embodiments described below is to address the above-mentioned drawbacks, as well as other problems. Example

[0077] like Figures 1 to 14 As shown, a suturing device is illustrated, including a support and recovery system 1, a first conveying system 4 and a second conveying system 5, the support and recovery system 1 includes a support traction structure 2 and a support component 3 connected to the support and 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 and traction structure 2 or captured by the support and traction structure 2; and, the support and 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.

[0078] 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.

[0079] 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 .

[0080] In this embodiment, the support assembly 3 includes a channel adaptor 31, a pulling member 32 and a clamping member 33; and the distal end and proximal end of the channel adaptor 31 are connected to the support frame 21 and the pulling member 32 respectively. Figure 3 shown.

[0081] 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 .

[0082] 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.

[0083] 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 slider 312 , and the clamping member 33 can slide relative to the channel adapting member 31 .

[0084] In the first embodiment, the symmetrical surface of the clamping member 33 does not move relative to the channel adapting member 31 during the sliding process.

[0085] 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 .

[0086] 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 adaptor 31 .

[0087] In the first embodiment, when the first puncture tube 42 punctures the secondary septal tissue, the clamping member 33 is located at the proximal end surface of the secondary septal tissue, and the clamping member 33 cooperates with the supporting frame 21 to fix the secondary septal tissue.

[0088] 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.

[0089] In the first embodiment, the auxiliary control member 12 is a metal wire.

[0090] 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 .

[0091] In the first embodiment, a connecting portion 6 is provided at the distal end of the first suture piece 41 and the distal end of the second suture piece 51 .

[0092] 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.

[0093] 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. Figure 15 and 16 shown.

[0094] In the first embodiment, the capture device 2201 can be pulled to the center of the support frame 21 .

[0095] 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.

[0096] In the first embodiment, the connection point 7 is formed as one.

[0097] In this embodiment 1, a proximal locking system 8 is further 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.

[0098] In this embodiment 1, 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 component 3 to recover the support traction structure 2.

[0099] In the first embodiment, a protection system is further included, wherein the protection system is at least partially arranged 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.

[0100] The exemplary operation process of the closed system of the first embodiment is as follows:

[0101] (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;

[0102] (2) Release the support and traction structure 2 to fit the left atrial surface, and retract the outer sheath 11, as shown in FIG. Figure 2 As shown;

[0103] (3) Operate the first delivery system 4 into the heart, such as Figure 3 As shown, the auxiliary control member 12 is then operated to cause the clamping member 33 to 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;

[0104] (4) Operate the second delivery system 5 into the heart, as shown in FIG. 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;

[0105] (5) Operate the retrieving outer sheath 11 to enter the right atrium, pull the supporting assembly 3 to retract the supporting traction structure 2, and the supporting traction structure 2 brings the distal end of the first suture piece 41 and the distal end of the second suture piece 51 into the retrieving outer sheath 11, as shown in FIG. Figure 9 and Figure 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, as shown. Figure 11 As shown;

[0106] (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. Figure 11 and 12 As shown;

[0107] (7) The locking structure 81 covers the proximal end portion 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. Figure 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 Figure 14 As shown, suture is completed. Example

[0108] The difference from the first embodiment is that:

[0109] In the second embodiment, the connecting portion 6 has a preset shape, the connecting member 22 is a membrane 2203 ; and the connecting points 7 are formed in plurality.

[0110] The following describes in detail the composition and connection of the various components in this embodiment with reference to the accompanying drawings:

[0111] 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 including 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.

[0112] 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.

[0113] 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.

[0114] In the second embodiment, the connecting portion 6 is in a hook shape or an anchor shape in a natural state. Figure 17 shown.

[0115] In the second embodiment, the connecting member 22 is a membrane 2203 connected to the supporting frame 21 .

[0116] In the second embodiment, the support frame 21 and the membrane 2203 form several 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.

[0117] 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. Figure 18 shown.

[0118] 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.

[0119] 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.

[0120] The foregoing description of several embodiments of the present application has been presented for illustrative purposes. It is not intended to be exhaustive or to limit the present application to the precise configurations, configurations, and / or steps disclosed, and it is apparent that many modifications and variations are possible in light of the above teachings. It is intended that the scope of the invention and all equivalents thereof 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 wherein 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, wherein the support traction structure comprises a support skeleton and a connecting member, wherein the connecting member is connected to the support skeleton; In addition, the supporting and traction structure is disc-shaped, and the connecting member limits the first suture member and the second suture member to be fixed on the supporting and traction structure. The first conveying system and the second conveying system include a first puncture tube and a second puncture tube. The first suture member and the second suture member are pre-installed in the first puncture tube and the second puncture tube. The distal ends of the first suture member and the distal ends of the second suture member are respectively provided with connecting parts, and the size of the connecting parts is larger than the diameter of the first suture member / the second suture member. After the connecting parts are released, they are captured by the connecting member.

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 movably connected manner between the two includes the support and traction structure moving coaxially relative to the support assembly.

4. The suturing device according to claim 1, wherein: 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.

5. The suturing device according to claim 4, characterized in that: The proximal end of the clamping member is movably connected to the channel adapter, and the clamping member fits with the channel adapter 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.

6. The suturing device according to claim 1, characterized in that: The connecting portion has a preset shape, and is connected to the connecting member and / or the supporting frame after being released.

7. The suturing device according to claim 1, 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.

8. 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.

9. 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 ways.

10. 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 conveying system and the second conveying 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 conveying system and the second conveying system are withdrawn, and the recovery outer sheath is then introduced to pull the support assembly to recover the support traction structure.

11. The suturing device according to claim 1, characterized in that: The first conveying system includes a clamping structure, wherein the clamping structure and the supporting and traction structure are respectively arranged on the proximal end surface and the distal end surface of the tissue to be closed; and the clamping structure is connected to the first puncture tube.

12. The suturing device according to claim 1, characterized in that: 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.

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