CN117426818A

CN117426818A - Suture device for interventional therapy

Info

Publication number: CN117426818A
Application number: CN202211703701.2A
Authority: CN
Inventors: 康立标; 魏新民; 廖海燕; 陈冠伦; 郑镇坤
Original assignee: Shenzhen Wuyou Medical Technology Co ltd
Current assignee: Shenzhen Wuyou Medical Technology Co ltd
Priority date: 2022-12-29
Filing date: 2022-12-29
Publication date: 2024-01-23

Abstract

The application provides a suturing device for interventional therapy, which relates to the technical field of medical instruments. The suturing device comprises a mounting tube and at least two puncture elements; a catching part is movably arranged in the mounting pipe; the puncture parts are hollow structures, and the inside of each puncture part is movably provided with a suture; the capturing part has elasticity, wherein when the capturing part extends out of the mounting tube, the capturing part is in an unfolding state; the catch in the deployed state has a mesh for the suture to pass through. The interventional therapy suture device can suture the far-end tissues without implanting foreign matters in the body, can effectively reduce the risk of complications, is applicable to tissue openings with different shapes and sizes, and can effectively reduce the occurrence of residual shunt.

Description

Suture device for interventional therapy

Technical Field

The application relates to the technical field of medical instruments, in particular to a suturing device 5 for interventional therapy.

Background

Congenital heart disease refers to heart or intrathoracic diseases caused by the formation disorder or dysplasia of heart and large blood vessels or failure of closed channels which should be automatically closed after birth in embryo development period

Abnormalities in the physical structure or function of large blood vessels include ventricular septal defects, atrial septal 0 defects, unclosed passageways, and the like. With the development of medical technology at present, for the channel which cannot be closed, the plugging closing can be performed by an operation mode of interventional plugging.

Clinically, the plugging and closing treatment is carried out by adopting an plugging device in the operation of interventional plugging. Occluders have been in clinical use for over twenty years and are very mature medical devices. But due to the relative position of the occluder

In the case of implantable foreign bodies, there is a risk of embolism, arrhythmia, etc., so that patients need to take 5 anticoagulant drugs. In addition, if a metal occluder is used, significant surgical access can also be blocked.

Even though degradable occluders are currently available such that the operative passageway is not blocked, they still belong to the implant, require catabolism in the patient, still may create a risk of embolism, and are more expensive than conventional metal occluders.

0 thus, treatment of an unclosed channel, how to reduce complications such as embolism and avoid

The implantation of foreign bodies in patients is a problem which needs to be solved in clinic at present.

Disclosure of Invention

The utility model provides a defect that is used for overcoming prior art provides a suturing device for interventional therapy for adopt the stopper to treat the passageway that fails to close among the prior art, there is the high problem of complication emergence risk.

To solve the above problems, embodiments of the present application provide a suturing device for interventional therapy, including a mounting tube and at least two piercing members;

a catching part is movably arranged in the mounting pipe;

the puncture parts are hollow structures, and the inside of each puncture part is movably provided with a suture;

the capturing part has elasticity, wherein when the capturing part extends out of the mounting tube, the capturing part is in an unfolding state;

the catch in the deployed state has a mesh for the suture to pass through.

As a further improvement of the above technical solution, the mounting tube and the piercing member are both disposed within an outer tube;

a first chamber is arranged in the outer tube, and the mounting tube is slidably arranged in the first chamber;

a plurality of second chambers are further arranged in the outer tube, the second chambers are in one-to-one correspondence with the puncture pieces, and the puncture pieces are slidably arranged in the corresponding second chambers;

wherein a plurality of the second chambers encircle the first chamber.

As a further improvement of the above technical solution, a guide part is provided at one end of the second chamber for the penetration member to protrude, and the guide part is biased to a side far away from the first chamber;

the included angle between the central axis of the guide part and the central axis of the first chamber is alpha, wherein alpha is more than or equal to 0 degrees and less than 90 degrees;

the included angle between the central axes of two adjacent guide parts is beta, wherein beta is more than or equal to 5 degrees and less than 180 degrees.

As a further improvement of the technical scheme, one end of the outer tube, which is used for the installation tube to extend out, is provided with a fitting end face;

and in the projection direction parallel to the joint end face, an included angle theta exists between the projection of the joint end face and the central axis of the outer tube, wherein the included angle theta is more than or equal to 5 degrees and less than or equal to 90 degrees.

As a further improvement of the technical scheme, the device further comprises a shell, wherein the outer tube extends into the shell;

the inside of the shell is provided with a linear driving mechanism for driving the puncture member to move.

As a further improvement of the above technical solution, the tail of the housing is provided with a thread feeding module for driving the suture to move in the puncture member.

As a further improvement of the technical scheme, the wire feeding module comprises a wire pressing assembly and a wire feeding driving mechanism;

the thread pressing assemblies are in one-to-one correspondence with the puncture pieces, the suture is extruded by the corresponding thread pressing assemblies, and the thread feeding driving mechanism is used for driving the thread pressing assemblies to enable the suture to move.

As a further improvement of the above technical solution, the crimping assembly comprises a first crimping wheel and a second crimping wheel, wherein the suture is extruded between the first crimping wheel and the second crimping wheel;

the wire feeding driving mechanism comprises a rotating button, and the rotating button is in transmission connection with the first wire pressing wheel and the second wire pressing wheel through a gear set.

As a further improvement of the technical scheme, a bracket and a wire spool are arranged in the wire feeding module, and the suture is wound on the wire spool;

the wire spool is rotatably arranged on the bracket, and the wire spool is tightly matched with the bracket.

As a further improvement of the above technical solution, a push rod is slidably disposed in the mounting tube, and the capturing portion is fixed to a top portion of the push rod.

The beneficial effects of this application are:

a suturing device for interventional procedures includes a mounting tube and at least two piercing members. When in treatment, the capturing part of the mounting tube passes through the channel to be sealed and stretches into one side; pushing the capturing part to extend out of the mounting tube, wherein the capturing part is unfolded; moving the piercing member such that the piercing member pierces tissue surrounding the channel to be sealed from the other side; driving the suture within the penetrating member to move such that the suture extends out of the penetrating member and out of the capturing portion, during which the suture passes through the mesh on the capturing portion; holding the installation tube, pulling the catch part so that the catch part is retracted into the installation tube, wherein during this process the sutures threaded in the mesh are brought under the drive of the catch part and are retrieved together.

The suture thread passes through the tissue around the channel to be sealed and then is pulled out from the channel to be sealed, wherein the pulled suture thread is knotted and fastened, and the channel to be sealed can be sutured.

The suture device for interventional therapy can suture the far-end tissues without implanting foreign matters in the body, can effectively reduce the risk of complications, is applicable to tissue openings with different shapes and sizes, and can effectively reduce the occurrence of residual shunt. In addition, the main consumable of the suturing device is a suture, the cost of the suture is very low, and the treatment cost can be effectively reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 shows a first schematic view of a suturing device for interventional therapy;

FIG. 2 shows a partial enlarged view of FIG. 1;

FIG. 3 shows a second schematic view of a suturing device for interventional therapy;

FIG. 4 shows a partial enlarged view of FIG. 2;

FIG. 5 shows a schematic view of a trap in an expanded state;

FIG. 6 shows a cross-sectional view of an outer tube;

FIG. 7 shows a cross-sectional view of FIG. 4;

fig. 8 shows a schematic diagram of the connection of the housing to the wire feeding module;

FIG. 9 shows an exploded view of the enclosure of FIG. 8;

fig. 10 shows a schematic diagram of a wire feeding module;

fig. 11 shows an exploded view of the wire feeding module of fig. 10;

FIG. 12 shows a schematic view of a connection socket;

FIG. 13 illustrates a first isometric view of a connection block and mounting block assembled;

FIG. 14 shows a second axial side view of the connection post assembled with the mount;

FIG. 15 shows a schematic view of a guide wire threaded over a heart;

FIG. 16 shows a schematic of the outer tube pushing into the left atrium;

FIG. 17 shows a schematic view of the mounting tube pushed into the left atrium;

FIG. 18 shows a schematic view of the catch being deployed;

FIG. 19 shows a schematic view of the penetration member extended and performing a penetration;

FIG. 20 shows a schematic view of a suture being pushed out of a penetrating member;

fig. 21 shows a schematic view of the driver and catch after withdrawal.

Description of main reference numerals:

1-mounting a tube; 2-piercing member; a 3-capturing section; 4-stitching; 5-pushing rod; 6-an outer tube; 7-a first chamber; 8-a second chamber; 9-a guide; 10-attaching end faces; 11-a housing; 12-thumb wheel; 13-a sliding rod; 14-an external thread portion; 15-notch; 16-a first shell portion; 17-a second shell portion; 18-a guide groove; 19-a first slide; 20-top cap; 21-a plug-in column; 22-clamping petals; 23-through grooves; 24-wire feeding module; 25-an outer cover; 26-linker; 27-a second slide; 28-connecting seats; 29-mounting base; 30-connecting columns; 31-a wire pressing assembly; 32-a first wire pressing wheel; 33-a second wire pressing wheel; 34-turning the knob; 35-a drive gear; 36-a driven gear; 37-a rotation axis; 38-a transmission gear; 39-bracket; 40-wire spool; 41-bulge; 42-grooves; 43-end cap.

Detailed Description

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.

Examples

Referring to fig. 1 and 2, in the present embodiment, a suturing device for interventional therapy is proposed, comprising a mounting tube 1 and at least two piercing members 2.

A catching part 3 is movably arranged in the installation tube 1. The catching part 3 may be housed inside the mounting tube 1 or may extend outside the mounting tube 1.

The puncture members 2 are hollow, and each puncture member 2 is movably provided with a suture thread 4 inside. The suture 4 may be a single-strand wire or a multi-strand wire.

The front end of the puncture member 2 is a puncture end, and the end of the puncture end is a sharp puncture head, thereby facilitating puncture.

In the present embodiment, the catching part 3 has elasticity.

Referring to fig. 1 and 2, when the catching part 3 is positioned in the installation tube 1, the catching part 3 is in a contracted state due to the constraint of the tube wall; referring to fig. 3 and 4, when the catching part 3 protrudes outside the mounting tube 1, the catching part 3 is unfolded to an unfolded state by the self elastic force.

The catching part 3 may be made of a metal material, a polymer material, or the like. The catching part 3 may be woven into a net structure by silk threads.

Referring to fig. 5, in order to catch the suture 4, the catching part 3 in the unfolded state has a mesh for passing the suture 4 therethrough.

Taking the example of repairing a channel to be closed on the heart, the operation steps of the suture device for interventional therapy are as follows when 5 is used:

passing the capturing portion 3 of the mounting tube 1 through the passageway to be occluded and into the atrium;

pushing the catching part 3 to extend out of the mounting tube 1 so that the catching part 3 is in an unfolded state;

moving the penetrating member 2 such that the penetrating member 2 penetrates through the tissue surrounding the passage to be closed;

the suture 4 in the puncture element 2 is driven to move so that the suture 4 protrudes out of the puncture element 2 and into the atrium 0, during which the suture 4 passes through the mesh in the capturing portion 3;

holding the mounting tube 1, pulling the catch 3, so that the catch 3 is retracted into the mounting tube 1, wherein during this the sutures 4, which are threaded in the mesh, are brought under the drive of the catch 3 and are retrieved together.

The suture 4 passes through the tissue around the channel to be sealed, enters the atrium, and is pulled out of the channel to be sealed 5, wherein the pulled suture 4 is knotted and fastened, and the suture of the channel to be sealed can be realized.

The suturing device for interventional therapy can realize suturing of the to-be-closed channel, does not need to implant foreign matters in the heart, so that the risk of complications can be effectively reduced, and meanwhile, the suturing mode is applicable to the to-be-closed channel with different shapes and sizes, and the occurrence of residual shunt can be effectively reduced.

In addition, the main consumable of the suturing device is the suture 4, the cost of the suture 4 is very low, and the cost of 0 treatment can be effectively reduced.

When the catching part 3 is in the unfolded state, a certain coverage area is needed, so that the suture 4 in the puncture member 2 can be aligned with the catching part 3 and inserted into the mesh of the catching part 3.

In this embodiment, the capturing portion 3 may have a disk shape, an ellipsoid shape, or the like when in the expanded state.

5 as shown in fig. 5, in order to be able to drive the catch 3 to move, the catch 3 may be fixed to the top of the push rod 5. Wherein the push rod 5 is slidably arranged inside the mounting tube 1. The outer diameter of the push rod 5 is smaller than the inner diameter of the installation tube 1, and the length of the push rod 5 may be greater than the length of the installation tube 1.

Pushing the push rod 5 by an external force causes the push rod 5 to slide with respect to the installation tube 1, thereby enabling the catching part 3 to protrude to the outside of the installation tube 1 or the catching to be retracted to the inside of the installation tube 1.

For the purpose of assembling the mounting tube 1 and the piercing element 2, with reference to fig. 2 and 4, both the mounting tube 1 and the piercing element 2 are arranged in an outer tube 6. Wherein the length of the push rod 5 may be greater than the length of the outer tube 6.

Referring to fig. 6, a first chamber 7 is provided in the outer tube 6, and the installation tube 1 is slidably provided in the first chamber 7; a plurality of second chambers 8 are arranged in the outer tube 6, the second chambers 8 are in one-to-one correspondence with the puncture elements 2, and the puncture elements 2 are slidably arranged in the corresponding second chambers 8. Wherein the length of the mounting tube 1 may be greater than the length of the outer tube 6.

In this embodiment, the number of piercing elements 2 may be set to four, and correspondingly, the number of second chambers 8 is also four. It should be noted that the number of piercing elements 2 may be set as desired, for example, six, eight, etc., in the actual manufacturing process.

The number of the puncture members 2 is set to be even so as to facilitate knotting and fastening of the suture 4 when the channel to be closed is sewn.

The second chamber 8 may surround the first chamber 7. Wherein the second chambers 8 may be distributed in an annular array about the central axis of the first chamber 7, taking into account the symmetry of the structure in order to obtain a better stitching effect. Accordingly, after being installed in the outer tube 6, the piercing elements 2 are also distributed in an annular array with respect to the installation tube 1.

The size of the channel to be closed is different, so that the puncture member 2 can puncture the tissue around the channel to be closed, the puncture member 2 can deflect outwards by a certain angle relative to the mounting tube 1, and the area surrounded by the puncture ends of the puncture members 2 is increased, so that the channel to be closed with a large size can be sutured.

Referring to fig. 7, in the present embodiment, the second chamber 8 is provided with a guide 9 at an end for the penetration member 2 to protrude, and the guide 9 is biased to a side away from the first chamber 7. The guide 9 can guide the piercing direction of the piercing element 2, so that the piercing end of the piercing element 2 is offset along the guide 9. The puncture member 2 may be made of a material such as metal, and may be deformed to some extent by the guide portion 9 when passing through the guide portion 9.

The included angle between the central axis of the guide part 9 and the central axis of the first chamber 7 is alpha, wherein alpha is more than or equal to 0 degrees and less than 90 degrees. When α=0°, the central axis of the guide 9 and the central axis of the first chamber 7 are considered to be parallel to each other.

Referring to fig. 4 and 7, since the piercing end of the piercing tool 2 passes through the guide portion 9, the angle between the central axis of the guide portion 9 and the central axis of the first chamber 7 is the angle between the central axis of the piercing end of the piercing tool 2 and the central axis of the first chamber 7.

The shape of the channel to be closed is not necessarily circular, but may be oval or other regular or irregular shape. In order to adapt to the channels to be closed of different shapes, the included angle between the guide parts 9 can also be set, in the embodiment, the included angle between the central axes of two adjacent guide parts 9 is beta, wherein, the included angle is more than or equal to 5 degrees and less than 180 degrees.

Referring to fig. 2 and 7, the included angle between the central axes of the adjacent two guide portions 9 is the included angle between the central axes of the piercing ends of the adjacent two piercing members 2.

The included angle α and included angle β may be set according to the specific shape and size of the channel to be closed.

As shown in fig. 2 and 4, in the present embodiment, the end of the outer tube 6 for the installation tube 1 to protrude is provided with a fitting end face 10. In the projection direction parallel to the fitting end face 10, an angle θ exists between the projection of the fitting end face 10 and the central axis of the outer tube 6, wherein 5 ° < θ+.ltoreq.90°.

When suturing, the attaching end face 10 of the outer tube 6 can attach to the tissue around the channel to be closed, thereby playing a supporting role, and facilitating the puncturing of the puncturing element 2.

As shown in fig. 1, in the present embodiment, the suturing device for interventional therapy further includes a housing 11, and the outer tube 6 extends into the housing 11. Wherein, the outer tube 6 and the shell 11 can be fixedly connected by interference fit and the like.

In order to enable movement of the lancet 2, a linear drive mechanism for driving the lancet 2 is provided inside the housing 11. Wherein the piercing member 2 can be driven to move relative to the outer tube 6 by a linear drive mechanism.

In this embodiment, the linear driving mechanism may employ a threaded screw mechanism.

Referring to fig. 8 and 9, in the present embodiment, a dial 12 and a slide lever 13 are provided in a housing 11. The dial wheel 12 and the housing 11 can rotate relatively, and the sliding rod 13 and the housing 11 can slide relatively.

The interior of the thumbwheel 12 includes a threaded through hole that extends through the thumbwheel 12 and is coaxial with the thumbwheel 12. Wherein the minor diameter of the threaded through hole of the thumbwheel 12 is larger than the outer diameter of the outer tube 6, thereby facilitating passage of the outer tube 6.

The sliding rod 13 is of hollow structure, thereby facilitating the passage of the outer tube 6. Wherein, the front end of the sliding rod 13 is provided with an external thread part 14, and the external thread part 14 is in threaded connection with the threaded through hole. The tail of the sliding rod 13 is fixedly connected with the wire feeding module 24, wherein the tail of the puncture element 2 is fixedly connected with the wire feeding module 24.

To facilitate rotation of the thumbwheel 12, a notch 15 is provided in a side wall of the housing 11, wherein the thumbwheel 12 is partially exposed outside the housing 11 through the notch 15.

The housing 11 includes a first housing portion 16 and a second housing portion 17.

Referring to fig. 9, guide grooves 18 are provided in each of the first and second housing parts 16 and 17, and two symmetrical first sliding pieces 19 are fixedly provided on the sliding rod 13, wherein the first sliding pieces 19 are inserted into the guide grooves 18 and slidably connected therewith. It is noted that only the guide groove 18 in the second shell portion 17 is shown in fig. 9 due to the view angle.

The slide rod 13 is made slidable only with respect to the housing 11 and is not rotatable by the engagement between the first slide piece 19 and the guide groove 18.

When the thumb wheel 12 is driven to rotate, the sliding rod 13 moves relative to the shell 11 under the action of the screw transmission, and the tail of the sliding rod 13 is fixedly connected with the wire feeding module 24, and the tail of the puncture member 2 is fixedly connected with the wire feeding module 24, so that the puncture member 2 moves synchronously with the sliding rod 13, thereby realizing the driving of the puncture member 2.

The linear driving mechanism is not limited to the above-described screw mechanism, and for example, a rack-and-pinion mechanism or the like may be employed.

The first housing part 16 is detachably connected to the second housing part 17, wherein both the first housing part 16 and the second housing part 17 can be connected by the engagement of the plug-in posts 21 with the plug-in holes. It is to be noted that, due to the view angle, only the plug-in posts 21 provided on the first shell portion 16 are shown in fig. 9.

Further, the front ends of the first and second shell portions 16 and 17 are each provided with a clip 22. The cross section of the clamping flap 22 is semicircular, and a through groove 23 is arranged in the clamping flap, wherein the cross section of the through groove 23 is semicircular, and the through groove 23 is communicated with the inside of the shell 11. When the two clamping flaps 22 are spliced, the outer tube 6 can be clamped, so that the outer tube 6 and the shell 11 are fixed.

Referring to fig. 8 and 9, after the first shell portion 16 and the second shell portion 17 are assembled, the two clamping flaps 22 form a hollow tube, wherein the top cap 20 is sleeved on the clamping flaps 22, so that the shaping of the hollow tube is realized, and the outer tube 6 penetrating through the hollow tube is in interference fit with the hollow tube.

As shown in fig. 8, the tail of the housing 11 is provided with a thread feeding module 24, and the thread feeding module 24 is used for driving the suture 4 to move in the puncture member 2.

As shown in fig. 10 and 11, the wire feeding module 24 includes a housing 25 and an end cover 43, a connector 26 at the front end of the housing 25 may be fixedly connected to the sliding rod 13 by a threaded connection, and the end cover 43 is disposed outside the housing 25 and may be fixedly connected to the housing 25 by a screw. Two second sliding pieces 27 are symmetrically arranged on the joint 26, wherein the second sliding pieces 27 are used for being inserted into and slidingly connected with the guide grooves 18 in the shell 11.

The inside of the housing 25 is provided with a connection seat 28 and a mounting seat 29, and the connection seat 28 is provided with a connection post 30, wherein the connection post 30 is inserted into the mounting seat 29, thereby realizing connection between the connection seat 28 and the mounting seat 29. The connecting seat 28 can be fixedly connected with the outer cover 25 through screws.

In this embodiment, the thread feeding module 24 includes a thread pressing assembly 31 and a thread feeding driving mechanism, the thread pressing assemblies 31 are in one-to-one correspondence with the piercing members 2, and the suture 4 is pressed by the corresponding thread pressing assemblies 31, wherein the thread feeding driving mechanism is used for driving the thread pressing assemblies 31 to move the suture 4.

Referring to fig. 12, the wire pressing assembly 31 is disposed on the connecting base 28. The crimping assembly 31 comprises a first crimping wheel 32 and a second crimping wheel 33, wherein the suture 4 is extruded between the first crimping wheel 32 and the second crimping wheel 33 of the corresponding crimping assembly 31. Since the number of the piercing elements 2 is four in the present embodiment, the thread pressing assembly 31 is also provided with four groups corresponding to four sutures 4.

As shown in fig. 11, the wire feeding drive mechanism includes a rotation knob 34 rotatably provided on the housing 25 through a bearing. The rotary knob 34 is in transmission connection with the first wire pressing wheel 32 and the second wire pressing wheel 33 through a gear set.

Referring to fig. 11 and 12, a driving gear 35 is fixedly disposed on the shaft body of the rotation knob 34, the driving gear 35 is meshed with a driven gear 36, four rotating shafts 37 are disposed in parallel on the connection base 28, the four rotating shafts 37 are sequentially distributed from top to bottom, and the driven gear 36 is fixed on one of the rotating shafts 37. Each rotating shaft 37 is fixedly provided with a transmission gear 38, wherein the transmission gears 38 are distributed in sequence from top to bottom, and adjacent transmission gears 38 are meshed with each other. Further, the first crimping wheel 32 and the second crimping wheel 33 of the same crimping assembly 31 may be respectively fixed on two adjacent rotating shafts 37, wherein the corresponding suture 4 is extruded between the first crimping wheel 32 and the second crimping wheel 33 of the crimping assembly 31.

When the rotation knob 34 is rotated, the driving gear 35 drives the driven gear 36 to rotate, so that the rotation shafts 37 fixedly connected with the driven gear 36 rotate, and since the transmission gear 38 is provided on each rotation shaft 37 and the adjacent transmission gears 38 are engaged with each other, each rotation shaft 37 rotates at the same rotation speed, and at the same time, the rotation directions of the adjacent rotation shafts 37 are opposite. With the rotation of all the rotating shafts 37, the first crimping wheel 32 and the second crimping wheel 33 of each crimping assembly 31 rotate at the same speed and in opposite directions, thereby realizing the driving of the suture 4 by static friction force.

Referring to fig. 12, the connection base 28 is provided with a card board having a groove, wherein the rotation shaft 37 is rotatably inserted into the corresponding groove, thereby achieving the installation of the rotation shaft 37.

As shown in fig. 13 and 14, in the present embodiment, the holder 39 and the spool 40 are provided inside the housing 25 of the wire feeding module 24, and the wire 4 is wound around the spool 40. The wire reels 40 are in one-to-one correspondence with the stitches 4.

The bracket 39 is fixedly arranged on the mounting seat 29, wherein the suture 4 passes through the mounting seat 29 and is inserted into the corresponding puncture outfit 2 through the gap between the corresponding first crimping wheel 32 and the second crimping wheel 33.

The spool 40 is rotatably disposed on the bracket 39, and when the rotation knob 34 is rotated, the spool 40 rotates and pays out the wire.

In this embodiment, the spool 40 may be tightly fitted to the bracket 39, that is, there is a static friction between the spool 40 and the bracket 39, so that the spool 40 is driven to rotate only when the rotation knob 34 rotates, thereby achieving the control of paying-off.

As shown in fig. 13, in order to mount and fix the penetration member 2, the connection block 28 is provided with protrusions 41, wherein the wire pressing assembly 31 and the protrusions 41 are disposed at both sides of the connection block 28.

The protrusions 41 may be provided in a cone shape, a hemispherical shape, or the like.

The surface of the protrusion 41 is provided with a groove 42 for mounting the tail end of the piercing member 2, and the tail end of the piercing member 2 is inserted into and fixed in the groove 42 by means of adhesive or the like. The grooves 42 are in one-to-one correspondence with the piercing elements 2, wherein the sutures 4 are inserted through the connecting seats 28 inside the respective piercing elements 2. The grooves 42 may be uniformly distributed over the protrusions 41.

Referring to fig. 1, the outer tube 6 is inserted into and passed through the wire feeding module 24, and the tail of the outer tube 6 protrudes out of the wire feeding module 24. To facilitate the installation of the piercing member 2, the piercing member 2 may pass through the outer tube 6 and the outer wall of the corresponding second chamber 8, thereby enabling the piercing member 2 to be inserted and installed into the interior of the corresponding second chamber 8.

Common non-occluded passages include patent foramen ovale.

The foramen ovale is the stump of the fetal room blood-flow separation traffic. The blood flow from the inferior vena cava in fetal stage is delivered to the left atrium via the Eustachian valve. The primary septum forms a membrane-like structure covering the secondary septum, and the foramen ovale closes as the left atrial pressure increases after birth. 25-35% of people can find patent foramen ovale on the anterior aspect of the fossa ovalis.

The diameter of the foramen ovale is about 1-19mm, on average 4.9mm, on average 12.2mm from the superior vena cava and on average 8.1mm from the aortic sinus. Patent foramen ovale is considered to be benign and harmless in many cases, but with recent progress of clinical research, patent foramen ovale is gradually recognized to be closely related to clinical diseases such as cerebral apoplexy of unknown origin, circulatory embolism of unknown origin (myocardial infarction, renal infarction, retinal arterial embolism) and migraine, and the related disease spectrum is still expanding. Thus, the foramen ovale needs to be plugged.

In order to more clearly understand the operation of the suturing device for interventional therapy, the suturing of the foramen ovale is taken as an example and described with reference to the accompanying drawings. Wherein a represents a guidewire, b represents a secondary septum, c represents a left atrium, d represents a primary septum, e represents a right atrium, and f represents an superior vena cava.

As shown in fig. 15, when performing the foramen ovale suturing, the physician passes through the guide wire to reach the foramen ovale, which is the tunnel hole between the primary septum and the secondary septum. The sheath line is placed in the right atrium adjacent to the foramen ovale, but does not pass through the foramen ovale, in order to avoid tearing of the foramen ovale by passage of the large sheath. At this time, the device is pushed along the sheath at a location other than the mounting tube 1 so that the chamfer of the instrument front guide is adjacent to the foramen ovale.

As shown in fig. 16, the mounting tube 1 is pushed along the guide wire with the outer tube 6 to the left atrium.

As shown in fig. 17 and 18, the guidewire is withdrawn and the capturing portion 3 is pushed along the mounting tube 1 to the left atrium and the push rod 5 is pushed so that the capturing portion 3 expands.

As shown in fig. 19, the capturing portion 3 is retracted and the capturing portion 3 is brought into abutment against the atrium, thereby improving the supporting force and facilitating the puncturing by the puncturing member 2. The penetrating member 2 is driven such that the penetrating member 2 passes through the tissue, wherein the penetrating member 2 passes through the mesh openings on the catching part 3.

As shown in fig. 20, the suture 4 is driven to move so that the suture 4 protrudes out of the penetrating member 2.

As shown in fig. 21, the penetrating member 2 is driven to retract into the second cavity, thereby preventing the suture 4 from being cut by the penetrating member 2, and then the mounting tube 1 is pushed and the catching part 3 is retracted into the mounting tube 1. At this time, the mounting tube 1 has a cutting force to the tissue that shares the sliding of the suture 4, thereby reducing the damage to the tissue. Along with the recovery of the capturing part 3, the capturing part 3 drives the suture 4 penetrating through the mesh of the capturing part to retract together.

After the end of the suture 4 is taken out through the oval foramen, the suture 4 is knotted and fastened, and then the treatment of closing the oval foramen can be completed.

The suture device for interventional therapy proposed in this embodiment can complete the operation of closing the foramen ovale, without leaving an implant in the patient, without the inherent risk of septum occlusion, and correspondingly, without the risk of embolism by the implant, thrombosis or advanced erosion by the implant, and without the risk of arrhythmia. In addition, due to the adoption of a suture mode, future operation access to the left atrium is not blocked, and the patient does not have the requirement of anticoagulation.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

Although embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives, and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.

Claims

1. A suturing device for interventional procedures comprising a mounting tube and at least two piercing members;

a catching part is movably arranged in the mounting pipe;

the catch in the deployed state has a mesh for the suture to pass through.

2. The suturing device for interventional therapy of claim 1, wherein the mounting tube and the penetrating member are both disposed within an outer tube;

wherein a plurality of the second chambers encircle the first chamber.

3. The suturing device for interventional therapy of claim 2, wherein the end of the second chamber from which the penetrating member protrudes is provided with a guide portion which is biased to a side away from the first chamber;

4. The suturing device for interventional therapy according to claim 2, wherein one end of the outer tube from which the mounting tube protrudes is provided with a fitting end face;

5. The suturing device for interventional therapy of claim 2, further comprising a housing, the outer tube extending into the housing interior;

6. The suturing device for interventional therapy of claim 5, wherein the housing tail is provided with a thread feeding module for urging the suture to move within the penetrating member.

7. The suturing device for interventional therapy of claim 6, wherein the wire feeding module comprises a wire pressing assembly and a wire feeding drive mechanism;

8. The suturing device for interventional therapy of claim 7, wherein the crimping assembly comprises a first crimping wheel and a second crimping wheel, wherein the suture is compressed between the first crimping wheel and the second crimping wheel;

9. The suturing device for interventional therapy of claim 6, wherein a bracket and a wire spool are provided inside the wire feeding module, the suture being wound around the wire spool;

10. The suturing device for interventional therapy of claim 1, wherein a push rod is slidably disposed within the mounting tube, the catch being secured to a top of the push rod.