Segmented combined type connected suturing instrument

Abstract

The invention relates to the field of medical instruments, in particular to a segmented combined connection suturing instrument which comprises a guide rail system, a thread capturing system, a locking system and a plurality of needle inserting and thread feeding systems, and at least part of the needle inserting and thread feeding systems are distributed on the guide rail system and penetrate through to-be-closed tissue according to a preset track. Suture line bodies and suture line heads connected with the suture line bodies are arranged in the needle inserting and line feeding systems, the multiple needle inserting and line feeding systems deliver the multiple suture line heads to penetrate through the line capturing system, the multiple suture line heads are captured by the line capturing system, and the line capturing system is operated to achieve in-vivo or in-vitro connection of the far ends of the multiple suture line bodies. The locking system enables the proximal end sides of the plurality of suture bodies to be connected in vivo and forms a segmented combined connection of the suture bodies.

Description

Technical Field

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

[0002] The foramen ovale is an open area in the middle of the atrial septum of the heart. It is located at the junction of the primary septum and the secondary septum in the embryonic period. It is the passage for blood to enter the left atrium from the right atrium during the fetal period. After birth, with the establishment of pulmonary circulation in the human heart, the foramen ovale will complete anatomical closure within 1 year of age. If the foramen ovale has not closed after the child is 3 years old, it is called PFO (Patent Foramen Ovale). Many studies in recent years have found that patent foramen ovale has a significant correlation with a variety of cardiovascular and cerebrovascular diseases, such as unexplained stroke, migraine, cerebral embolism, etc. With the development and improvement of interventional treatment technology, the method of treating PFO through minimally invasive interventional technology is now very mature, but there are still many problems in its use.

[0003] Patent 202010233230.8 discloses a patent foramen ovale suture device, comprising an outer tube and an inner tube, wherein the inner tube can slide inside the outer tube, a suture threading groove is provided at the center of the inner tube, two traction needle grooves are symmetrically provided inside the inner tube, the top of the traction needle groove is arc-shaped, two guide blocks are symmetrically provided at the end of the inner tube, the edges of the guide blocks are arc-shaped and aligned with the traction needle grooves, an elastic traction needle is provided in the traction needle groove, the elastic traction needle can slide along the edges of the traction needle groove and the guide block, a clamping hole corresponding to the elastic traction needle is provided on the end face of the outer tube corresponding to the guide block, a thread hook is provided in the clamping hole, and a thread hook is provided on the elastic traction needle Sutures are passed through the suture grooves. The defects of this design are: first, since the diameters of the inner tube and the outer tube cannot be designed to be too large, and the clamping holes are arranged on the outer tube, the spacing between the two clamping holes is limited, and the outer edge of the guide block will not exceed the outer tube. Therefore, the distance between the two puncture points on the secondary septum and the primary septum is fixed, which cannot adapt to all oval foramen tissues and cannot arbitrarily select a position for puncture; secondly, the movement trajectory of the elastic traction needle is determined by the guide block, but the guide block and the clamping hole cannot fix the two end faces of the tissue, and the tissue will move during puncture. Therefore, there are many uncertainties as to whether the elastic traction needle can actually pass through the tissue.

[0004] Patent US8246636B2 discloses a suture device 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 oval foramen channel, and the second suture to pass through the primary septum tissue and the oval foramen 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 oval foramen 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 oval foramen 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, when the puncture needle passes through the tissue to be closed, the tissue moves due to unrestricted movement, thereby affecting the puncture effect; second, the distance between the puncture points is limited, and the position of the suture piece relative to the tissue to be closed is relatively fixed after implantation, and the surgeon is limited in the puncture positions that can be selected during the operation; 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 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 to provide a segmented combined connection suturing device.

[0008] The object of the present invention is achieved through the following solutions: A segmented combined connection suturing instrument comprises a guide rail system, a thread catching system, a locking system and a plurality of needle and thread feeding systems, at least part of the needle and thread feeding systems are distributed on the guide rail system and pass through the tissue to be closed according to a preset track, a suture body and a suture head connected to the suture body are arranged in the needle and thread feeding system, a plurality of the needle and thread feeding systems deliver a plurality of the suture heads through the thread catching system, and the plurality of the suture heads are captured by the thread catching system, the thread catching system is operated to realize the connection of the distal ends of the plurality of suture bodies inside or outside the body, the locking system realizes the connection of the proximal ends of the plurality of suture bodies inside the body, and a segmented combined connection of the suture bodies is formed.

[0009] The purpose of the present invention can be further achieved by the following technical solutions: Furthermore, the wire catching system includes an expansion frame and a wire catching structure. The wire catching system is disc-shaped, and the expansion frame diverges from the center to the peripheral edge; and the expansion frame presses against the distal surface of the tissue to be closed when the needle-thread feeding system passes through the tissue to be closed.

[0010] Furthermore, the expanded frame has a preset shape; the expanded frame is preinstalled in the loading tube.

[0011] Furthermore, the expanded frame is in a grid double-disc shape in a natural state.

[0012] Furthermore, the wire-catching structure includes one or more of a thin film body and a dense mesh support.

[0013] Furthermore, the line catching structure is hook-shaped.

[0014] Furthermore, the wire catching structure includes a limiting slot.

[0015] Furthermore, the needle-puncture and wire-feeding system at least includes a first needle-puncture and wire-feeding system and a second needle-puncture and wire-feeding system; and the first needle-puncture and wire-feeding system and the second needle-puncture and wire-feeding system respectively pass through two pieces of tissue to be closed.

[0016] Furthermore, the first needle-puncture and wire-feeding system and the second needle-puncture and wire-feeding system pass through the secondary septal tissue and the primary septal tissue respectively.

[0017] Furthermore, the first needle-puncture and wire-feeding system includes a first puncture tube, and the second needle-puncture and wire-feeding system includes a second puncture tube. The number of the first puncture tube and the second puncture tube is one or more.

[0018] Furthermore, the first needle puncture and wire feeding system includes one first puncture tube, the second needle puncture and wire feeding system includes two second puncture tubes, the three suture heads are captured by the wire capturing system, and the distal ends of the three suture bodies are connected outside the body to form a connection point.

[0019] Furthermore, there is one puncture point on the secondary septal tissue and two puncture points on the primary septal tissue.

[0020] Furthermore, the connection point is formed by knotting, welding or bonding.

[0021] Furthermore, the connection point is a fixed knot.

[0022] Furthermore, the first needle-puncture and wire-feeding system also includes a bend adjustment and alignment tube, the first puncture tube is pre-installed in the bend adjustment and alignment tube, and a rotating fitting is provided at the distal end of the bend adjustment and alignment tube; and the guide rail system includes a sleeve and an abutment assembly, the bend adjustment and alignment tube and the second puncture tube are pre-installed in the sleeve, the abutment assembly includes a support rod and a fitting sheet, and the distal end of the fitting sheet is movably connected to the rotating fitting.

[0023] Furthermore, the bending adjustment and alignment tube has a bending function, and a plurality of slits are arranged on its outer surface.

[0024] Furthermore, a U-shaped groove is provided at the distal end of the bonding sheet, and the U-shaped groove provides a rotation space for the movement of the rotating fitting.

[0025] Furthermore, the bending adjustment and alignment tube is pushed toward the distal end at the proximal end, and the distal end portion of the bending adjustment and alignment tube is automatically bent until the distal end of the bending adjustment and alignment tube is vertically close to the oval foramen tissue.

[0026] Furthermore, the distal ends of the plurality of suture bodies are connected inside or outside the body to form one or more connection points; and the connection points are moved to the distal surface of the tissue to be closed by operating the suture body.

[0027] Furthermore, after the suturing instrument completes the suturing action, the connection point is located on the left atrial surface or the right atrial surface of the foramen ovale or is not inside the heart.

[0028] Further, pulling all or part of the suture body causes the connection point to move to the distal surface of the tissue to be closed.

[0029] Furthermore, it also includes a support system connected to the wire catching system, the support system includes a push-pull member and a transition member, the transition member connects the expansion frame and the push-pull member; and the flexibility of the transition member is greater than that of the push-pull member.

[0030] Furthermore, the line catching system can move relative to the supporting system.

[0031] Furthermore, the support system further comprises a clamping member, the push-pull member comprises a channel adapting member, the clamping member is connected to the channel adapting member and can slide and / or rotate relative to the channel adapting member.

[0032] Further, the proximal end of the channel adapter is connected to the clamping member.

[0033] Furthermore, the support system further comprises an auxiliary control member, and the auxiliary control member is connected to the free end of the clamping member.

[0034] Furthermore, a spring or a torsion spring is provided at a connection position between the proximal end of the clamping member and the channel adapting member.

[0035] 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 expansion frame to fix the secondary septal tissue.

[0036] 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.

[0037] Furthermore, the auxiliary control member is a thin wire or a thin rope.

[0038] Furthermore, it also includes a loading system, in which the line catching system and the supporting system are pre-installed; and the loading system includes a loading tube.

[0039] Furthermore, the locking system includes a locking structure and a cutting structure; and the locking structure is used to fix the plurality of suture bodies located at the proximal surface of the tissue to be closed; and the cutting structure shears the suture body portion located at the proximal end of the locking structure.

[0040] Furthermore, the loading tube delivers the wire catching system into the heart and releases the expansion frame at the left atrial surface of the foramen ovale, the wire catching system and the supporting system remain in the body, and the loading tube is recovered.

[0041] Furthermore, the guide rail system and the needle and wire feeding system enter the right atrial cavity of the heart, and the push-pull member is pulled to make the expansion frame press against the left atrial surface of the foramen ovale, and the first needle and wire feeding system and the second needle and wire feeding system are operated to reach the proximal surface of the secondary septal tissue and the proximal surface of the primary septal tissue respectively along the preset track, and the first puncture tube and the second puncture tube pass through the tissue and the wire catching system to deliver the plurality of suture heads to the distal end of the expansion frame.

[0042] Furthermore, the suture thread head is in a ball shape or a strip shape.

[0043] Furthermore, the wire catching structure includes a thin film body, and after the suture thread head passes through the thin film body, it will no longer move to the proximal end surface of the wire catching structure, and the suture thread head is restricted to the distal end surface of the wire catching system.

[0044] Furthermore, the support system is pulled to drive the wire capturing system back into the loading tube, and the wire capturing system brings the distal ends of the plurality of suture bodies outside the body and forms a connection point, and then the proximal end of the suture body is pulled, and the connection point moves to the place where it was initially captured, i.e., the left atrial surface of the foramen ovale, and the suture body forms at least one closed loop on the left atrial surface.

[0045] Furthermore, the locking system is operated to achieve in vivo connection of the proximal ends of the plurality of suture bodies and form a segmented combined connection of the suture bodies.

[0046] Furthermore, the thread-catching system has two major functions: supporting the distal surface of the tissue and capturing the suture thread head.

[0047] Furthermore, the fixed position of the guide rail system affects the needle insertion point of the needle insertion and thread feeding system.

[0048] Furthermore, it includes an enhanced occlusion system, which includes an enhanced occlusion piece, which is in the shape of a sheet or a disc, and the distal ends of a plurality of suture bodies are connected to the enhanced occlusion piece inside or outside the body, and the enhanced occlusion piece and the plurality of suture bodies are moved to the distal surface of the tissue to be closed; and the enhanced occlusion system includes a delivery tube for pre-installing the enhanced occlusion piece and a pushing piece for pushing the enhanced occlusion piece.

[0049] Furthermore, the reinforced sealing member replaces the connection point to achieve the function of connecting the suture body.

[0050] Furthermore, the reinforced occluding member not only has the function of connecting the suture body, but also increases the contact area with the oval foramen of the left atrial surface, thereby further occluding the oval foramen tissue.

[0051] 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 point of the puncture needle will not exceed the diameter of the delivery sheath, and the sheath diameter of the interventional surgery is designed to be small, so the puncture needle can have a small selection range for puncture. At the same time, the tissue is not restricted or supported when the puncture needle punctures, and the puncture hole is prone to tearing during the puncture process. The present application solves the above problems. First, when the suturing device of the present application performs puncture, the distal and proximal surfaces of the fixed tissue adopt two systems that do not affect each other, namely, the wire catching system and the needle-thread delivery system. Since the expanded skeleton of the wire catching system has a preset shape, it can be folded in the loading tube during pre-installation and is disc-shaped after release, so that the wire catching system can be used without expanding the tube diameter. A distal surface support member with a larger support surface is provided below, and the puncture points of the needle-thread feeding system are all within the disk surface of the expanded skeleton. Therefore, the needle-thread feeding system has a wide range of puncture point choices, and the operator has more freedom to choose the puncture point during operation, and the needle-thread feeding system can operate the guide system wherever the puncture is performed, and there is no restriction between the puncture points; secondly, since the disk surface of the expanded skeleton is large, the puncture point of the needle-thread feeding system can be set in the middle position between the secondary septum tissue and the primary septum tissue, reducing the risk of tearing the heart tissue and achieving a good suturing effect; thirdly, the present application also designs a clamping member and abutting components to fix the proximal surface of the tissue, so that the tissue will not move during the puncture action and the puncture stability is good.

[0052] 2. Different from the prior art, the suture body of the present application is only located on the left and right atrial surfaces of the foramen ovale after implantation. There is no implant in the foramen ovale channel, the lesion is smooth and has no protrusions, and the present application is provided with multiple needle-piercing and wire-feeding systems, which can deliver multiple suture bodies for suturing. Even when dealing with oddly shaped foramen ovale tissues, the surgeon can perform suturing, and the number and position of the suture bodies during suturing, as well as the number of connection points formed and where the connection points are located, can all be selected according to the actual situation of the patient, thereby reducing dependence on surgical imaging equipment.

[0053] 3. Different from the prior art, the wire-catching structure of the present application includes a film body or a dense mesh bracket or a hook. As long as the suture thread head does not escape from the wire-catching system, combined with the support structure being a grid structure, the suture thread head will be delivered to the distal surface of the support structure, and it will be difficult for the suture thread head to escape from the wire-catching system. Therefore, the action of capturing the suture thread head will be smooth.

[0054] 4. Different from the existing technology, multiple systems adopt modular design, such as the separate entry and recovery of the wire-catching system and the separate entry and recovery of the locking system. Compared with the integrated design, the advantages of this design are: the interventional sheath is designed to be small, which will not expand the foramen ovale channel and will not cause surgical trauma. The needle-piercing and wire-feeding system is also a microneedle design. The size of the puncture hole is small, the position of the puncture hole can be freely selected, and the structural design is ingenious, giving the operator a lot of room to play.

[0055] 5. Different from the prior art, the push-pull member of the present application includes a channel adapter, which has a certain rigidity and can support the secondary septal tissue and the primary septal tissue at the same time during the operation. When the first puncture tube performs puncture, it can cooperate with the support structure to better rest against the distal surface of the secondary septal tissue. When the second puncture tube performs puncture, it plays the function of limiting and fixing the primary septal tissue, thereby ensuring the stable puncture of the primary septal tissue. In addition, the size of the channel adapter is smaller than that of the recovered support structure, and will not expand the size of the recovered outer sheath.

[0056] 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

[0057] 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 3 It is a schematic diagram of the arrangement of the guide rail system, the wire catching system, the locking system and the needle-thread feeding system of the present invention.

[0058] Figure 4 and Figure 5 It is a structural schematic diagram of the line catching system of the present invention.

[0059] Figure 6 It is a structural schematic diagram of the first needle-piercing and thread-feeding system of the present invention.

[0060] Figures 7 to 15 The figure is a schematic diagram of the process of suturing performed by the suturing apparatus of the present invention.

[0061] The features indicated by the numbers in the accompanying drawings are as follows: 1-guide rail system, 11-sleeve, 12-abutment component, 121-support rod, 122-fitting sheet, 1221-U-shaped groove, 2-wire catching system, 21-opening frame, 22-wire catching structure, 221-film body, 3-locking system, 31-locking structure, 32-resection structure, 4-needle and wire feeding system, 41-first needle and wire feeding system, 411-first puncture tube, 412-bending alignment tube, 4121-rotating matching part, 42-second needle and wire feeding system, 421-second puncture tube, 5-suture body, 6-suture head, 7-support system, 71-push-pull part, 711-channel adapter, 72-transition part, 73-clamping part, 74-auxiliary control part, 8-loading system, 81-loading tube, 9-connection point. Implementation

[0062] 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.

[0063] 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.

[0064] The present application will be described in more detail below with reference to different embodiments and examples of several aspects of the present application.

[0065] 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.

[0066] 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.

[0067] One of the purposes of the embodiments described below is to address the above-mentioned deficiencies, as well as other problems. Example

[0068] like Figures 1 to 3 As shown, a segmented combined connection suturing instrument according to an embodiment of the present application is illustrated, comprising a guide rail system 1, a thread catching system 2, a locking system 3 and a plurality of needle and thread feeding systems 4, at least part of the needle and thread feeding systems 4 are distributed on the guide rail system 1 and pass through the tissue to be closed according to a preset track, a suture body 5 and a suture head 6 connected to the suture body 5 are provided in the needle and thread feeding system 4, a plurality of the needle and thread feeding systems 4 deliver a plurality of the suture heads 6 through the thread catching system 2, and a plurality of the suture heads 6 are captured by the thread catching system 2, the thread catching system 2 is operated to realize the connection of the distal ends of the plurality of suture bodies 5 inside or outside the body, the locking system 3 realizes the connection of the proximal ends of the plurality of suture bodies 5 inside the body, and a segmented combined connection of the suture bodies 5 is formed.

[0069] In the first embodiment, the wire catching system 2 includes a support frame 21 and a wire catching structure 22. Figure 4 As shown, the wire catching system 2 is disc-shaped, and the expansion frame 21 diverges from the center to the peripheral edge; and the expansion frame 21 presses against the distal surface of the tissue to be closed when the needle-piercing wire feeding system 4 passes through the tissue to be closed.

[0070] In the first embodiment, the expanded frame 21 has a preset shape; the expanded frame 21 is pre-installed in the loading tube 81 and is in a grid double-disc shape in a natural state.

[0071] In the first embodiment, the wire-catching structure 22 includes a thin film body 221. Figure 4 and 5 shown.

[0072] In the first embodiment, the needle-thread feeding system 4 includes at least a first needle-thread feeding system 41 and a second needle-thread feeding system 42; and the first needle-thread feeding system 41 and the second needle-thread feeding system 42 pass through the secondary septal tissue and the primary septal tissue respectively. Figure 2 shown.

[0073] In the first embodiment, the first needle-piercing and suture-feeding system 41 includes one first puncture tube 411, and the second needle-piercing and suture-feeding system 42 includes two second puncture tubes 421. Figure 1 As shown, the three suture heads 6 are captured by the catching system 2, and the distal ends of the three suture bodies 5 are connected in vitro to form a connection point 9, as shown in FIG. Fig.13 shown.

[0074] In the first embodiment, there is one puncture point on the secondary septal tissue and two puncture points on the primary septal tissue.

[0075] In the first embodiment, the first needle-piercing and thread-feeding system 41 further comprises a bend-adjusting and alignment tube 412, in which the first puncture tube 411 is pre-installed, and a rotating fitting 4121 is provided at the distal end of the bend-adjusting and alignment tube 412. Figure 6 As shown; and, the guide rail system 1 includes a sleeve 11 and an abutment assembly 12, the bending adjustment tube 412 and the second puncture tube 421 are pre-installed in the sleeve 11, and the abutment assembly 12 includes a support rod 121 and a fitting sheet 122, and the distal end of the fitting sheet 122 is movably connected to the rotating mating piece 4121.

[0076] In the first embodiment, the bending adjustment and alignment tube 412 has a bending function, and a plurality of slits are provided on its outer surface.

[0077] In the first embodiment, a U-shaped groove 1221 is provided at the distal end of the fitting sheet 122 , and the U-shaped groove 1221 provides a rotation space for the movement of the rotating fitting member 4121 .

[0078] In the first embodiment, the bend adjusting and alignment tube 412 is pushed toward the distal end at the proximal end, and the distal end of the bend adjusting and alignment tube 412 is automatically bent until the distal end of the bend adjusting and alignment tube 412 is vertically adjacent to the foramen ovale tissue.

[0079] In the first embodiment, the suture body 5 is pulled at the same time so that the connection point 9 moves to the distal end of the tissue to be closed. Fig.13 shown.

[0080] In the first embodiment, a support system 7 connected to the line catching system 2 is further included. The support system 7 includes a push-pull member 71 and a transition member 72. The transition member 72 connects the open frame 21 and the push-pull member 71. Moreover, the flexibility of the transition member 72 is greater than that of the push-pull member 71. Figure 5 shown.

[0081] In the first embodiment, the support system 7 further includes a clamping member 73 , the push-pull member 71 includes a channel adapting member 711 , and the clamping member 73 is connected to the channel adapting member 711 and can slide and / or rotate relative to the channel adapting member 711 .

[0082] In the first embodiment, the support system 7 further includes an auxiliary control component 74 , and the auxiliary control component 74 is connected to the free end of the clamping component 73 .

[0083] In the first embodiment, when the first puncture tube 411 punctures the secondary septal tissue, the clamp 73 is located at the proximal surface of the secondary septal tissue, and the clamp 73 cooperates with the expansion frame 21 to fix the secondary septal tissue. Fig.10 shown.

[0084] In the first embodiment, the length of the channel adaptor 711 is A, the length of the clamping member 73 is B, and the length relationship between the two is A=(1 / 3-2)B.

[0085] In the first embodiment, a loading system 8 is further included. The line catching system 2 and the supporting system 7 are pre-installed in the loading system 8 . Furthermore, the loading system 8 includes a loading tube 81 .

[0086] In the first embodiment, the locking system 3 includes a locking structure 31 and a cutting structure 32; and the locking structure 31 is used to fix the multiple suture bodies 5 located on the proximal surface of the tissue to be closed; and the cutting structure 32 shears the portion of the suture body 5 located at the proximal end of the locking structure 31.

[0087] In the first embodiment, the loading tube 81 delivers the wire catching system 2 into the heart and releases the expansion frame 21 on the left atrial surface of the foramen ovale. The wire catching system 2 and the supporting system 7 remain in the body, and the loading tube 81 is recovered.

[0088] In the first embodiment of the present invention, the guide rail system 1 and the needle and wire feeding system 4 enter the right atrial cavity of the heart, and the push-pull member 71 is pulled to make the expansion frame 21 press against the left atrial surface of the foramen ovale, and the first needle and wire feeding system 41 and the second needle and wire feeding system 42 are operated to reach the proximal surface of the secondary septal tissue and the proximal surface of the primary septal tissue respectively along the preset track, and the first puncture tube 411 and the second puncture tube 421 pass through the tissue and the wire catching system 2 to deliver the plurality of suture heads 6 to the distal end of the expansion frame 21.

[0089] In the first embodiment, the suture thread head 6 is in a strip shape.

[0090] In the first embodiment, the wire catching structure 22 includes a thin film body 221 , and the suture thread head 6 will no longer move to the proximal surface of the wire catching structure 22 after passing through the thin film body 221 , and the suture thread head 6 is restricted to the distal surface of the wire catching system 2 .

[0091] In the first embodiment, the support system 7 is pulled to drive the wire-catching system 2 back into the loading tube 81, and the wire-catching system 2 brings the distal ends of the plurality of suture bodies 5 to the outside of the body and forms a connection point 9, and then the proximal end of the suture body 5 is pulled, and the connection point 9 moves to the place where it was initially captured, that is, the left atrial surface of the foramen ovale, and the suture body 5 forms a closed loop on the left atrial surface. Fig.13 shown.

[0092] The exemplary operation process of the closed system of the first embodiment is as follows: (1) The loading system 8 delivers the wire capture system 2 and the support system 7 into the right atrium through the femoral vein approach, and then moves to the position of the patent oval foramen between the secondary septum and the primary septum near the atrial septum, such as Figure 7 As shown; (2) releasing the wire capture system 2 to fit with the left atrium, releasing the support system 7 located in the foramen ovale channel and the right atrium, and retrieving the loading tube 81, as shown in FIG. Figure 8 As shown; (3) Operate the guide rail system 1 and bring the needle and wire feeding system 4 into the right atrium, then tighten the push-pull member 71, and operate the auxiliary control member 74 to make the clamping member 73 clamp the secondary septum tissue, as shown in FIG. Fig. 9 As shown, the first puncture tube 411 and the second puncture tube 421 are operated to perform puncture, and the suture head 6 and the distal suture body 5 are delivered to pass through the oval foramen tissue and the wire capture system 2, as shown in FIG. Fig.10 As shown, the guide rail system 1 and the needle-thread feeding system 4 are recovered; (4) Operate the loading tube 81 to enter the right atrium, pull the support system 7 to retract the wire-catching system 2, and the wire-catching system 2 moves proximally with the plurality of suture heads 6 to the outside of the body, as shown in FIG. Fig.11 As shown, the distal end portions of the plurality of suture bodies 5 are connected to form a connection point 9, as shown Fig.12 As shown; (5) Pull the proximal end of the suture body 5, and the connection point 9 moves to the left atrial surface, such as Fig.13 As shown; (6) The locking structure 31 covers the proximal portion of the suture body 5 and enters the right atrium along the suture body 5, and then the cutting structure 32 is operated to cut off the portion of the suture body 5 located at the proximal end of the locking structure 31. Fig.14 and 15 As shown, the segmented combined connection of the suture body 5 is completed.

[0093] 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 segmented combined connection suturing device, characterized in that: The invention comprises a guide rail system, a wire catching system, a locking system and a plurality of needle and wire feeding systems, at least part of the needle and wire feeding systems are distributed on the guide rail system and pass through the tissue to be closed according to a preset track, the needle and wire feeding system is provided with a suture body and a suture head connected to the suture body, a plurality of the needle and wire feeding systems deliver a plurality of the suture heads through the wire catching system, and the plurality of the suture heads are captured by the wire catching system, the wire catching system is operated to realize the connection of the distal ends of the plurality of suture bodies inside or outside the body, the locking system realizes the connection of the proximal ends of the plurality of suture bodies inside the body, and forms a segmented combined connection of the suture bodies.

2. The suturing device according to claim 1, characterized in that: The wire catching system comprises an expansion frame and a wire catching structure. The wire catching system is disc-shaped, and the expansion frame diverges from the center to the peripheral edge. Moreover, when the needle-piercing and wire-feeding system passes through the tissue to be closed, the expansion frame abuts against the distal surface of the tissue to be closed.

3. The suturing device according to claim 1, characterized in that: The wire-catching structure includes one or more of a thin film body and a dense mesh support.

4. The suturing device according to claim 1, characterized in that: The needle-puncture and wire-feeding system at least comprises a first needle-puncture and wire-feeding system and a second needle-puncture and wire-feeding system; and the first needle-puncture and wire-feeding system and the second needle-puncture and wire-feeding system respectively pass through two tissues to be closed.

5. The suturing device according to claim 4, characterized in that: The first needle-puncture and wire-feeding system includes a first puncture tube, and the second needle-puncture and wire-feeding system includes a second puncture tube. The number of the first puncture tube and the second puncture tube is one or more.

6. The suturing device according to claim 5, characterized in that: The first needle-puncture and thread-feeding system also includes a bend adjustment tube, the first puncture tube is pre-installed in the bend adjustment tube, and a rotating fitting is provided at the distal end of the bend adjustment tube; and the guide rail system includes a sleeve and an abutment assembly, the bend adjustment tube and the second puncture tube are pre-installed in the sleeve, the abutment assembly includes a support rod and a fitting sheet, and the distal end of the fitting sheet is movably connected to the rotating fitting.

7. The suturing device according to claim 1, characterized in that: The distal ends of the plurality of suture bodies are connected in vivo or in vitro to form one or more connection points; and the connection points are moved to the distal surface of the tissue to be closed by operating the suture body.

8. The suturing device according to claim 1, characterized in that: It also includes an enhanced occlusion system, which includes an enhanced occlusion piece, which is in the shape of a sheet or a disc, and the distal ends of multiple suture bodies are connected to the enhanced occlusion piece inside or outside the body, and the enhanced occlusion piece and the multiple suture bodies are moved to the distal surface of the tissue to be closed; and the enhanced occlusion system includes a delivery tube for pre-installing the enhanced occlusion piece and a pushing piece for pushing the enhanced occlusion piece.

9. The suturing device according to claim 2, characterized in that: It also includes a support system connected to the wire catching system, the support system includes a push-pull member and a transition member, the transition member connects the expansion frame and the push-pull member; and the flexibility of the transition member is greater than that of the push-pull member.

10. The suturing device according to claim 9, characterized in that: The support system further comprises a clamping member, the push-pull member comprises a channel adapting member, the clamping member is connected to the channel adapting member and can slide and / or rotate relative to the channel adapting member.

11. The suturing device according to claim 9, characterized in that: It also includes a loading system, in which the line catching system and the supporting system are pre-installed; and the loading system includes a loading tube.

12. The suturing device according to claim 1, characterized in that: The locking system includes a locking structure and a cutting structure; the locking structure is used to fix a plurality of suture bodies located at the proximal surface of the tissue to be closed; and the cutting structure shears the suture body portion located at the proximal end of the locking structure.

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