A suturing device with segmented combined connection

Abstract

The application relates to the field of medical instruments, in particular to a segmented combined connection suture instrument which comprises a guide rail system, a thread catching system, a locking system and a plurality of needle thread delivery systems, at least part of the needle thread delivery systems are distributed on the guide rail system and pass through the tissue to be closed along preset tracks, the needle thread delivery system is provided with a suture thread body and a suture thread head connected with the suture thread body, a plurality of suture thread heads are delivered by the plurality of needle thread delivery systems to pass through the thread catching system, and the plurality of suture thread heads are caught by the thread catching system; the thread catching system is operated to realize the connection of the distal ends of the plurality of suture thread bodies in or out of the body; and the locking system realizes the connection of the proximal ends of the plurality of suture thread bodies in the body, and forms the segmented combined connection of the suture thread 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, located at the junction of the primordial and secundum septa during the embryonic period. It serves as 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 within the human heart, the foramen ovale will complete anatomical closure within one year of age. If the foramen ovale still has not closed after a child is three years old, it is called a PFO (Patent Foramen Ovale). Many studies in recent years have found that patent foramen ovale is significantly correlated with a variety of cardiovascular and cerebrovascular diseases, such as unexplained stroke, migraine, and cerebral embolism. 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 suturing 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 in 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 the elastic traction needle is provided with a thread hook. Sutures are passed through the suture slots. 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 hole is provided on the outer tube, the distance 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 the position cannot be arbitrarily selected 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. The tissue will move during puncture, so there are many uncertainties as to whether the elastic traction needle can actually pass through the tissue.

[0004] US Patent No. 8246636B2 discloses a suture device 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 points to the septum secundum and 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 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, 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 after implantation is relatively fixed, and the surgeon's selectable puncture positions during surgery 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 to provide a segmented combined connection suturing device.

[0008] The object of the present invention is achieved through the following solutions:

[0009] A suturing instrument with segmented modular connection includes a guide rail system, a thread catching system, a locking system and multiple 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, the needle and thread feeding system is provided with a suture body and a suture head connected to the suture body, multiple needle and thread feeding systems deliver multiple suture heads through the thread catching system, and multiple suture heads are captured by the thread catching system, the thread catching system is operated to realize the connection of the distal ends of multiple suture bodies inside or outside the body, the locking system realizes the connection of the proximal ends of multiple suture bodies inside the body, and forms a segmented modular connection of the suture bodies.

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

[0011] 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 toward the peripheral edge. Moreover, when the needle-feeding wire feeding system passes through the tissue to be closed, the expansion frame presses against the distal surface of the tissue to be closed.

[0012] Furthermore, the expanded frame has a preset shape; the expanded frame is pre-installed in the loading tube.

[0013] Furthermore, the expanded frame is in a grid double-disc shape in a natural state.

[0014] Furthermore, the wire-catching structure includes one or more of a thin film body and a dense mesh support.

[0015] Furthermore, the line-catching structure is hook-shaped.

[0016] Furthermore, the wire-catching structure includes a limiting slot.

[0017] Furthermore, the needle-puncture and wire-feeding system comprises at least 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.

[0018] Furthermore, the first needle-puncture and suture-feeding system and the second needle-puncture and suture-feeding system pass through the secondary septal tissue and the primary septal tissue respectively.

[0019] Furthermore, the first needle puncture and suture feeding system includes a first puncture tube, and the second needle puncture and suture feeding system includes a second puncture tube. The number of the first puncture tube and the second puncture tube is one or more.

[0020] Furthermore, the first needle puncture and thread feeding system includes one first puncture tube, the second needle puncture and thread feeding system includes two second puncture tubes, the three suture heads are captured by the thread capturing system, and the distal ends of the three suture bodies are connected outside the body to form a connection point.

[0021] Furthermore, there is one puncture point on the secondary septal tissue and two puncture points on the primary septal tissue.

[0022] Furthermore, the connection points are formed by knotting, welding or bonding.

[0023] Furthermore, the connection point is a fixed knot.

[0024] Furthermore, the first needle-puncture and thread-feeding system also includes a bend-adjusting and alignment tube, the first puncture tube is pre-installed in the bend-adjusting and alignment tube, and the distal end of the bend-adjusting and alignment tube is provided with a rotating fitting; and the guide rail system includes a sleeve and an abutment assembly, the bend-adjusting and alignment tube and the second puncture tube are pre-installed in the sleeve, and 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.

[0025] Furthermore, the bending adjustment and alignment tube has a bending function, and a plurality of slits are provided on its outer surface.

[0026] Furthermore, a U-shaped groove is provided at the distal end of the fitting sheet, and the U-shaped groove provides a rotation space for the movement of the rotating fitting part.

[0027] Furthermore, the bend-adjusting and alignment tube is pushed toward the distal end at the proximal end, and the distal end portion of the bend-adjusting and alignment tube automatically bends until the distal end of the bend-adjusting and alignment tube is perpendicularly against the foramen ovale tissue.

[0028] 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.

[0029] 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.

[0030] Further, pulling all or part of the suture body moves the connection point to the distal end surface of the tissue to be closed.

[0031] 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.

[0032] Furthermore, the line catching system is movable relative to the supporting system.

[0033] Furthermore, the support system further includes a clamping member, the push-pull member includes a channel adapting member, and the clamping member is connected to the channel adapting member and can slide and / or rotate relative to the channel adapting member.

[0034] Furthermore, the proximal end of the channel adapter is connected to the clamping member.

[0035] Furthermore, the support system further includes an auxiliary control member connected to the free end of the clamping member.

[0036] 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.

[0037] 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 expansion frame to fix the secondary septal tissue.

[0038] 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.

[0039] Furthermore, the auxiliary control member is a thin wire or a thin rope.

[0040] Furthermore, it further comprises a loading system, wherein the line catching system and the supporting system are pre-installed in the loading system; and the loading system comprises a loading tube.

[0041] Furthermore, the locking system includes a locking structure and a cutting structure; and the locking structure is used to fix the multiple suture bodies located on 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.

[0042] Furthermore, the loading tube delivers the wire-catching system into the heart and releases the expansion frame to be located on the left atrial surface of the foramen ovale. The wire-catching system and the support system remain in the body, and the loading tube is recovered.

[0043] Furthermore, the guide rail system and the needle and wire feeding system enter the right atrial cavity of the heart, pulling the push-pull member so that the expansion frame is 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 along the preset track respectively, and the first puncture tube and the second puncture tube pass through the tissue and the wire catching system to deliver multiple suture heads to the distal end of the expansion frame.

[0044] Furthermore, the suture thread head is in a ball shape or a strip shape.

[0045] Furthermore, the wire-catching structure includes a thin film body, and the suture thread head will no longer move to the proximal end surface of the wire-catching structure after passing through the thin film body, and the suture thread head is restricted to the distal end surface of the wire-catching system.

[0046] 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 multiple suture bodies outside the body and forms a connection point. Then, the proximal end of the suture body is pulled, and the connection point moves to the place where it was initially captured, that is, the left atrial surface of the foramen ovale, and the suture body forms at least one closed loop on the left atrial surface.

[0047] 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.

[0048] Furthermore, the thread-catching system has two major functions: supporting the distal surface of the tissue and capturing the suture thread head.

[0049] Furthermore, the fixed position of the guide rail system affects the needle insertion point of the needle insertion and thread feeding system.

[0050] Furthermore, it includes an enhanced sealing system, which includes an enhanced sealing 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 sealing piece inside or outside the body, and the enhanced sealing piece and multiple suture bodies are moved to the distal surface of the tissue to be closed; and the enhanced sealing system includes a delivery tube for pre-installed enhanced sealing pieces and a pushing piece for pushing the enhanced sealing pieces.

[0051] Furthermore, the reinforced sealing member replaces the connection point to achieve the function of connecting the suture body.

[0052] Furthermore, the reinforced occluding member not only has the function of connecting the suture body, but also increases the contact area with the foramen ovale on the left atrial surface, thereby further sealing the foramen ovale tissue.

[0053] Compared with the prior art, the advantages of the technical solution of this application include at least the following:

[0054] 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 has 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 instrument 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 feeding system. Since the expanded frame of the wire catching system has a preset shape, it can be folded into the loading tube when pre-installed and is disc-shaped after release, so that the wire catching system can be used without expanding the tube diameter. A distal support member with a larger support surface is provided below, and the puncture points of the needle and wire feeding system are all within the disk surface of the expanded skeleton. Therefore, the puncture point selection range of the needle and wire feeding system is wide, and the operator has more freedom to choose the puncture point during operation, and the guide rail system can be operated at any place for puncture by the needle and wire feeding system, 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 and wire feeding system can be set in the middle position between the secondary septum tissue and the primary septum tissue, which reduces the risk of tearing the heart tissue and has a good suturing effect; thirdly, the present application also designs a clamping member and an abutment component 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.

[0055] 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, and the lesion is smooth without any protrusions. In addition, the present application is equipped with multiple needle and wire delivery systems, which can deliver multiple suture bodies for suturing. Even when dealing with oddly shaped foramen ovale tissue, the surgeon can perform suturing. Moreover, the number and position of the suture bodies during suturing, the number of connection points formed, and the location of the connection points can all be selected according to the actual situation of the patient, reducing dependence on surgical imaging equipment.

[0056] 3. Different from the prior art, the thread-capturing structure of the present application includes a thin film or a dense mesh support or a hook. As long as the suture thread head does not escape from the thread-capturing system, combined with the expansion structure being a grid structure, the suture thread head will be delivered to the distal surface of the expansion structure. It is difficult for the suture thread head to escape from the thread-capturing system, so the action of capturing the suture thread head will be very smooth.

[0057] 4. Different from the existing technology, multiple systems adopt a modular design, such as the separate entry and retrieval of the wire-catching system and the separate entry and retrieval 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 and wire delivery system also adopts 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 surgeon a lot of room to play.

[0058] 5. Different from the existing technology, 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 is punctured, it can cooperate with the support structure to better rest against the distal surface of the secondary septal tissue. When the second puncture tube is punctured, 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 support structure after recovery, and will not expand the size of the recovered outer sheath.

[0059] 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

[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 in conjunction with the accompanying drawings, in which:

[0061] Figures 1 to 3 It is a schematic diagram of the arrangement of the guide rail system, wire catching system, locking system and needle and wire feeding system of the present invention.

[0062] Figure 4 and Figure 5 Schematic diagram of the structure of the wire catching system of the present invention.

[0063] Figure 6 It is a structural schematic diagram of the first needle-piercing and thread-feeding system of the present invention.

[0064] Figures 7 to 15 This is a schematic diagram of the suturing process performed by the suturing instrument of the present invention.

[0065] The features indicated by the numbers in the accompanying drawings are as follows:

[0066] 1-guide rail system, 11-sleeve, 12-rest component, 121-support rod, 122-fitting sheet, 1221-U-shaped groove, 2-wire catching system, 21-spreading 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 Method

[0067] 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.

[0068] 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.

[0069] The present application will be described in more detail below with reference to different embodiments and examples of several aspects of the application.

[0070] 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.

[0071] 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.

[0072] One purpose of the embodiments described below is to address the above-mentioned drawbacks, as well as other problems. Example

[0073] 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 multiple 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, the needle and thread feeding system 4 is provided with a suture body 5 and a suture head 6 connected to the suture body 5, multiple needle and thread feeding systems 4 deliver multiple suture heads 6 through the thread catching system 2, and multiple 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 multiple suture bodies 5 inside or outside the body, the locking system 3 realizes the connection of the proximal sides of multiple suture bodies 5 inside the body, and forms a segmented combined connection of the suture bodies 5.

[0074] In the first embodiment, the line catching system 2 includes a support frame 21 and a line catching structure 22. Figure 4 As shown, the wire-catching system 2 is disc-shaped, and the expansion frame 21 diverges from the center toward the peripheral edge; and the expansion frame 21 abuts against the distal surface of the tissue to be closed when the needle-puncturing and wire-feeding system 4 passes through the tissue to be closed.

[0075] In the first embodiment, the expansion framework 21 has a preset shape; the expansion framework 21 is preloaded in the loading tube 81, and is in a grid double-disc shape in a natural state.

[0076] In the first embodiment, the line capturing structure 22 includes a film body 221, as shown in Figure 4 and 5 .

[0077] In the first embodiment, the needle-threading system 4 includes at least a first needle-threading system 41 and a second needle-threading system 42; and the first needle-threading system 41 and the second needle-threading system 42 respectively pass through the secondary septal tissue and the primary septal tissue, as shown in Figure 2 .

[0078] In the first embodiment, the first needle-threading system 41 includes one first puncture tube 411, and the second needle-threading system 42 includes two second puncture tubes 421, as shown in Figure 1 ; three suture heads 6 are captured by the line capturing system 2, and three suture bodies 5 distal ends are connected to form a connection point 9 outside the body, as shown in Figure 13 .

[0079] In the first embodiment, there is one puncture point on the secondary septal tissue, and there are two puncture points on the primary septal tissue.

[0080] In the first embodiment, the first needle-threading system 41 further includes a bending and aligning tube 412, the first puncture tube 411 is preloaded in the bending and aligning tube 412, and the distal end of the bending and aligning tube 412 is provided with a rotating fitting part 4121, as shown in Figure 6 ; and the guide rail system 1 includes a sleeve 11 and an abutting assembly 12, the bending and aligning tube 412 and the second puncture tube 421 are preloaded in the sleeve 11, the abutting assembly 12 includes a supporting rod 121 and an abutting sheet 122, and the distal end of the abutting sheet 122 is movably connected with the rotating fitting part 4121.

[0081] In the first embodiment, the bending and aligning tube 412 has a bending function, and the outer surface thereof is provided with a plurality of slits.

[0082] In the first embodiment, the distal end of the abutting sheet 122 is provided with a U-shaped groove 1221, and the U-shaped groove 1221 provides a rotating space for the movement of the rotating fitting part 4121.

[0083] In the first embodiment, the bending and aligning tube 412 is pushed towards the distal end from the proximal end, and the distal end part of the bending and aligning tube 412 is automatically bent until the most distal end of the bending and aligning tube 412 is perpendicularly abuts the oval foramen tissue.

[0084] In the first embodiment, simultaneously pulling the suture body 5 makes the connection point 9 move to the distal surface of the tissue to be closed, as shown in Figure 13

[0085] In the first embodiment, the support system 7 connected with the line capturing system 2 includes a push-pull piece 71 and a transition piece 72, and the transition piece 72 connects the distraction framework 21 and the push-pull piece 71, and the flexibility of the transition piece 72 is greater than that of the push-pull piece 71, as shown in Figure 5

[0086] In the first embodiment, the support system 7 further includes a clamping piece 73, and the push-pull piece 71 includes a channel adapting piece 711, and the clamping piece 73 is connected with the channel adapting piece 711 and can slide and / or rotate relative to the channel adapting piece 711.

[0087] In the first embodiment, the support system 7 further includes an auxiliary control piece 74, and the auxiliary control piece 74 is connected with the free end of the clamping piece 73.

[0088] In the first embodiment, when the first puncture tube 411 punctures the secondary septum tissue, the clamping piece 73 is located at the proximal surface of the secondary septum tissue, and the clamping piece 73 cooperates with the distraction framework 21 to fix the secondary septum tissue, as shown in Figure 10

[0089] In the first embodiment, the length of the channel adapting piece 711 is A, and the length of the clamping piece 73 is B, and the length relationship between the two is A=(1 / 3~2)B.

[0090] In the first embodiment, it further includes a loading system 8, and the line capturing system 2 and the support system 7 are preloaded in the loading system 8; and the loading system 8 includes a loading tube 81.

[0091] 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 a plurality of suture bodies 5 located at the proximal surface of the tissue to be closed; and the cutting structure 32 cuts part of the suture body 5 located at the proximal end of the locking structure 31.

[0092] In the first embodiment, the loading tube 81 delivers the line capturing system 2 into the heart, and releases the distraction framework 21 at the left atrial surface of the foramen ovale, and the line capturing system 2 and the support system 7 remain in the body, and the loading tube 81 is recovered.

[0093] ​​​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. 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 multiple suture heads 6 to the distal end of the expansion frame 21.

[0094] In the first embodiment, the suture thread head 6 is in a strip shape.

[0095] In the first embodiment, the wire-catching structure 22 includes a thin film body 221 . After the suture thread head 6 passes through the thin film body 221 , it will no longer move to the proximal surface of the wire-catching structure 22 . The suture thread head 6 is restricted to the distal surface of the wire-catching system 2 .

[0096] In the first embodiment, the support system 7 is pulled to drive the catching system 2 back into the loading tube 81. The catching system 2 brings the distal ends of the multiple suture bodies 5 outside the body and forms a connection point 9. 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. The suture body 5 forms a closed loop on the left atrial surface. Figure 13 shown.

[0097] The exemplary operation process of the closed system of the first embodiment is as follows:

[0098] (1) The loading system 8 delivers the wire capture system 2 and the support system 7 into the right atrium through the femoral vein, and then moves to the patent foramen ovale position between the secondary septum and the primary septum near the atrial septum, such as Figure 7 As shown;

[0099] (2) Release the wire-catching system 2 to fit the left atrium, release the support system 7 to be located in the foramen ovale channel and the right atrium, and reclaim the loading tube 81, as shown in FIG. Figure 8 As shown;

[0100] (3) Operate the guide rail system 1 and bring the needle 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. Figure 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 through the oval foramen tissue and the catching system 2, as shown. Figure 10 As shown, the guide rail system 1 and the needle and thread feeding system 4 are recovered;

[0101] (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 toward the proximal end with the multiple suture heads 6 to the outside of the body, as shown in FIG. Figure 11 As shown, the distal end portions of the plurality of suture bodies 5 are connected to form a connection point 9, as shown Figure 12 As shown;

[0102] (5) Pull the proximal end of the suture body 5, and the connection point 9 moves to the left atrial surface, as shown in FIG. Figure 13 As shown;

[0103] (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 operates the cutting structure 32 to cut off the portion of the suture body 5 located at the proximal end of the locking structure 31, as shown in FIG. Figure 14 and 15 As shown, the segmented combined connection of the suture body 5 is completed.

[0104] 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 segmented combined connection suturing device, characterized in that: The invention 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, the needle and thread feeding system is provided with a suture body and a suture head connected to the suture body, a plurality of the needle and thread feeding systems deliver a plurality of the suture heads through the thread catching system, and a 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 sides of the plurality of suture bodies inside the body, and forms a segmented combined connection of the suture bodies; the thread catching system comprises an expansion frame and a thread catching structure, the thread 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 and thread feeding system passes through the tissue to be closed.

2. The suturing instrument 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.

3. The suturing instrument according to claim 1, wherein: The needle-puncture and thread-feeding system comprises at least a first needle-puncture and thread-feeding system and a second needle-puncture and thread-feeding system; and the first needle-puncture and thread-feeding system and the second needle-puncture and thread-feeding system respectively pass through two pieces of tissue to be closed.

4. The suturing instrument according to claim 3, characterized in that: The first needle puncture and suture feeding system includes a first puncture tube, and the second needle puncture and suture feeding system includes a second puncture tube. The number of the first puncture tube and the second puncture tube is one or more.

5. The suturing instrument according to claim 4, characterized in that: The first needle-puncture and thread-feeding system also includes a bend-adjusting and alignment tube, in which the first puncture tube is pre-installed, and a rotating fitting is provided at the distal end of the bend-adjusting and alignment tube; and the guide rail system includes a sleeve and an abutment assembly, in which the bend-adjusting and alignment tube and the second puncture tube are pre-installed in the sleeve, and the abutment assembly includes a support rod and an abutment sheet, and the distal end of the abutment sheet is movably connected to the rotating fitting.

6. The suturing instrument 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 end surface of the tissue to be closed by operating the suture body.

7. The suturing instrument according to claim 1, characterized in that: It also includes an enhanced sealing system, which includes an enhanced sealing 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 sealing piece inside or outside the body, and the enhanced sealing piece and multiple suture bodies are moved to the distal surface of the tissue to be closed; and the enhanced sealing system includes a delivery tube for pre-installed enhanced sealing pieces and a pushing piece for pushing the enhanced sealing pieces.

8. The suturing instrument according to claim 1, 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.

9. The suturing instrument according to claim 8, characterized in that: The support system further includes a clamping member, the push-pull member includes a channel adapting member, and the clamping member is connected to the channel adapting member and can slide and / or rotate relative to the channel adapting member.

10. The suturing instrument according to claim 8, characterized in that: The invention also includes a loading system, wherein the line capturing system and the supporting system are pre-installed in the loading system; and the loading system includes a loading tube.

11. The suturing instrument 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 the plurality of suture bodies located at the proximal end 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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