Suturing device

Abstract

The utility model discloses a suturing device, and belongs to the technical field of medical instruments. The suturing device comprises a conveyor, the interior of the conveyor is provided with a suture line traction channel and a first containing cavity, the conveyor is provided with a traction opening, and the suture line traction channel and the traction opening communicate with the first containing cavity; a part of the limiting piece is located in the first containing cavity, and the limiting piece is in sliding connection with the conveyor in the first direction; the traction mechanism comprises a first traction component, a second traction component and an elastic piece. Limiting of the first traction component and the second traction component in the second direction can be relieved by moving the limiting piece, the second traction component enables the rope ring to withdraw towards the far end of the first traction component under the acting force of the elastic piece so as to clamp and fix the suture line, then the first traction component is pulled, and the suture line is pulled out of the body of the patient. The action of manually pulling the rope ring can be omitted, so that the operation steps are saved, and the operation efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of surgical instruments, in particular to a suturing device. BACKGROUND

[0002] The mitral valve is a part of the heart, located between the left atrium and the left ventricle. Blood is pumped from the left atrium into the left ventricle, and when the left ventricle contracts to pump blood into the body, the mitral valve closes to prevent blood from being pumped back into the left atrium, such as Figure 1 .

[0003] And the mitral valve insufficiency is one of the most common valvular lesions today, the main causes are mitral annulus dilatation, chordae function failure, mitral valve myxomatous degeneration, leaflet prolapse, rheumatic heart valve disease, ischemic lesion, etc. The more common method to repair the damaged mitral valve function is to replace or repair the valve through surgical operation, but due to the need for extracorporeal circulation technology support, the trauma to the human body is relatively large, and there is a considerable high complication and mortality rate for elderly patients and patients with more complications.

[0004] Now the minimally invasive surgery treatment is a better choice for most heart valve diseases, the main treatment methods are artificial chordae implantation, mitral annuloplasty and mitral valve edge-to-edge repair, etc. Among them, annuloplasty is mainly used for treating mitral regurgitation caused by annulus dilatation.

[0005] Some congenital heart diseases, ischemic heart diseases or dilated cardiomyopathy, etc. cause the left ventricle or left atrium to become larger, which indirectly causes the mitral annulus to dilate, and when the left ventricle contracts, the anterior and posterior leaflets of the mitral valve cannot be joined, thereby causing mitral regurgitation. Annuloplasty mainly shrinks the dilated mitral annulus through some minimally invasive instruments, so that the anterior and posterior leaflets can be effectively joined during ventricular contraction, thereby solving the problem of mitral regurgitation.

[0006] At present, the suture line is implanted into the suture position of the heart through a suturing instrument, specifically, the end of the suture line is first captured by a rope sleeve, and the rope sleeve is manually retracted to the end of the sleeve through a traction mechanism on the suturing instrument to fix the end of the suture line at the end of the sleeve, and then the traction mechanism is withdrawn as a whole to pull out the suture line. There is a problem of time-consuming and laborious in manually retraction of the rope sleeve to the end of the sleeve, which will increase the operation time. CONTENT OF THE UTILITY MODEL

[0007] In view of the above problems, the present application provides a suturing device which can improve the time-consuming and laborious situation when the traction mechanism is withdrawn.

[0008] In a first aspect, the present application provides a suturing device, comprising:

[0009] The delivery device has a suture pulling channel and a first accommodating cavity in the interior of the delivery device, and the delivery device is provided with a pulling port, and the suture pulling channel and the pulling port are in communication with the first accommodating cavity, respectively.

[0010] The limiting member has a part located in the first accommodating cavity, and the limiting member is in sliding connection with the delivery device along a first direction.

[0011] The pulling mechanism includes a first pulling member, a second pulling member, and an elastic member, the first pulling member and the second pulling member are in sliding connection along a second direction, one end of the elastic member is matched with the first pulling member, the other end of the elastic member is matched with the second pulling member, part of the first pulling member is sleeved on the second pulling member, and the second pulling member extends from the distal end of the first pulling member and forms a rope ring for sleeving the suture, the rope ring is arranged in the suture pulling channel, the first pulling member and the second pulling member are in insertion with the limiting member along the second direction, the elastic force of the elastic member has a tendency to make the rope ring retract to the distal end of the first pulling member, and the direction in which the pulling mechanism moves in or out of the first accommodating cavity is the same as the second direction, and the first direction intersects the second direction.

[0012] By moving the limiting member, the first pulling member and the second pulling member can be released from the limitation along the second direction, the second pulling member makes the rope ring retract to the distal end of the first pulling member under the action of the elastic member, so as to clamp and fix the suture, and then the first pulling member is pulled to pull the suture out of the patient's body, compared with the prior art, the action of manually pulling the rope ring can be saved, the operation steps are saved, and the operation efficiency is improved.

[0013] In some embodiments, the elastic member is a compression spring, one end of the compression spring is in abutment with the second pulling member, and the other end of the compression spring is in abutment with the first pulling member.

[0014] In some embodiments, the first pulling member includes a first pullback member, the second pulling member includes a second pullback member, the first pullback member has a guide groove extending along the second direction, and the second pullback member is arranged in the guide groove and can slide along the second direction in the guide groove.

[0015] In some embodiments, the guide groove includes a side wall parallel to the second direction, and an inner surface of the side wall is provided with a limiting groove, the limiting groove includes a first part, and the second pullback member has a limiting part located in the first part, and the size of the first part along the second direction is greater than the size of the limiting part along the second direction.

[0016] In some embodiments, the limiting groove further includes a second part in communication with the first part, one end of the second part through the guide groove has a slot opening and forms a taking-out port, and the limiting part is configured to be able to exit from the taking-out port to separate the second pullback member from the guide groove.

[0017] In some embodiments, the first traction member comprises a first pullback member and a traction sleeve, the first pullback member is connected with a proximal end of the traction sleeve, the second traction member comprises a second pullback member and a traction cord, the second pullback member is slidingly connected with the first pullback member in the second direction, the second pullback member is connected with a proximal end of the traction cord, a part of the traction cord is located in the traction sleeve, the traction cord extends from a distal end of the traction sleeve and forms a cord loop.

[0018] In some embodiments, the traction sleeve is detachably connected with the first pullback member.

[0019] In some embodiments, an inner portion of the first pullback member is provided with a first channel, the first channel penetrates through a distal end of the first pullback member in the second direction, a side of the first pullback member in the first direction is provided with a first insertion hole, the first insertion hole is in communication with the first channel, and the first traction member further comprises:

[0020] a first connecting member which is inserted into the first insertion hole, an inner portion of the first connecting member is provided with a second channel, a side wall of the second channel is provided with a first threaded hole which penetrates through an outer surface of the first connecting member in the first direction;

[0021] a first fastener which is threadedly connected with the first threaded hole, and the first fastener is in abutment with the traction sleeve.

[0022] In some embodiments, the first connecting member is limitingly fitted with the first insertion hole in a circumferential direction of the first insertion hole.

[0023] In some embodiments, an inner portion of the second pullback member is provided with a third channel which penetrates through a distal end of the second pullback member in the second direction, the second pullback member is provided with a second insertion hole, and the second traction member further comprises:

[0024] a clamping member which is inserted into the second insertion hole and clamps the traction cord.

[0025] In some embodiments, the second insertion hole is located on a side of the second pullback member in the first direction, and the clamping member comprises:

[0026] a second connecting member which is inserted into the second insertion hole, an inner portion of the second connecting member is provided with a fourth channel which is configured to be in communication with the third channel, a side wall of the fourth channel is provided with a second threaded hole which penetrates through an outer surface of the second connecting member;

[0027] a second fastener which is threadedly connected with the second threaded hole and is used for clamping the traction cord with the side wall of the fourth channel.

[0028] In some embodiments, the second connecting member is limitingly fitted with the second insertion hole in a circumferential direction of the second insertion hole.

[0029] The above description is only a summary of the technical solutions of the present application. In order to make the technical means of the present application more clearly understood and implemented according to the content of the description, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described in detail. BRIEF DESCRIPTION OF DRAWINGS

[0030] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not meant to limit the present application. Moreover, in the drawings, like reference numerals designate the same parts throughout the various drawings. In the drawings:

[0031] Figure 1 Axial view of a bearing of a suturing device according to an embodiment of the present application;

[0032] Figure 2 Axial view of a separation of a traction mechanism and a conveyor of a suturing device according to an embodiment of the present application;

[0033] Figure 3 Axial view of a traction mechanism of a suturing device according to an embodiment of the present application;

[0034] Figure 4 Partial cross-sectional view of an axis of a traction sleeve of a suturing device according to an embodiment of the present application;

[0035] Figure 5 Partial cross-sectional view of a cross-section of a suturing device according to an embodiment of the present application, perpendicular to the traction direction;

[0036] Figure 6 Partial cross-sectional view of an axis of a traction sleeve of a suturing device according to another embodiment of the present application;

[0037] Figure 7 Partial cross-sectional view of a suturing device according to an embodiment of the present application, after clamping a biological tissue and before the needle has pierced the biological tissue;

[0038] Figure 8 Partial cross-sectional view of a suturing device according to an embodiment of the present application, after the suture has pierced the biological tissue and before the traction mechanism has pulled the suture;

[0039] Figure 9 Partial cross-sectional view of a suturing device according to an embodiment of the present application, after the traction mechanism has pulled the suture.

[0040] Reference numerals in the detailed description of the embodiments are as follows:

[0041] 100. Suturing device;

[0042] 10, conveyor; 101, conveyor sheath; 102, handle; 11, suture delivery channel; 12, suture pulling channel; 13, puncture needle delivery channel; 20, limiting piece; 30, pulling mechanism; 31, first pulling member; 311, first pull-back piece; 3111, first jack; 3112, first channel; 3113, first clamping groove; 3114, guide groove; 3115, limiting groove; 31151, first part; 31152, second part; 312, pulling sleeve; 313, first connecting piece; 3131, second channel; 3132, first threaded hole; 314, first fastener; 32, second pulling member; 321, second pull-back piece; 3211, third channel; 3212, second jack; 3213, second clamping groove; 3214, limiting part; 322, pulling rope; 3221, rope ring; 323, clamping member; 3231, second connecting piece; 32311, fourth channel; 32312, second threaded hole; 3232, second fastener; 3233, first clamping part; 3234, second clamping part; 33, elastic piece;

[0043] 40, suture; 41, clamping piece; 50, puncture needle; 60, first clamping arm; 61, puncture needle passing hole; 70, second clamping arm; 80, elastic gasket;

[0044] X, first direction; Y, second direction; P, biological tissue. DETAILED DESCRIPTION

[0045] The embodiments of the technical scheme of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0047] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified.

[0048] Reference to "an embodiment" herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. It is expressly understood that any of the embodiments described herein can be incorporated into any other embodiment.

[0049] In the description of the embodiments of the application, the term "and / or" is merely used to describe associated objects, and can represent the three conditions of A and / or B, which can represent three cases of A alone, A and B, and B alone. In addition, the character " / " in this article generally represents an "or" relationship between the front and rear associated objects.

[0050] In the description of the embodiments of the application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0051] In the description of the embodiments of the application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the application.

[0052] In the description of the embodiments of the application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing", and the like should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the application can be understood according to the specific circumstances.

[0053] The following embodiments are described with reference to Figures 1-9 A stitching device 100 according to some embodiments of the application is described by way of example.

[0054] The suture device 100 comprises a delivery device 10, a limiting member 20 and a traction mechanism 30, wherein the delivery device 10 has a suture line traction channel 12 and a first accommodating cavity in the interior of the delivery device 10, the delivery device 10 is provided with a traction port, the suture line traction channel 12 and the traction port are communicated with the first accommodating cavity respectively. A part of the limiting member 20 is located in the first accommodating cavity, and the limiting member 20 is in sliding connection with the delivery device 10 along a first direction X. The traction mechanism 30 comprises a first traction member 31, a second traction member 32 and an elastic member 33, the first traction member 31 and the second traction member 32 are in sliding connection along a second direction Y, one end of the elastic member 33 is matched with the first traction member 31, the other end of the elastic member 33 is matched with the second traction member 32, a part of the first traction member 31 is sleeved on the second traction member 32, and the second traction member 32 extends from the distal end of the first traction member 31 and forms a rope ring 3221 for sleeving the suture line 40, the rope ring 3221 is arranged in the suture line traction channel 12, the first traction member 31 and the second traction member 32 are both in insertion with the limiting member 20 along the second direction Y, the elastic force of the elastic member 33 has a tendency to make the rope ring 3221 shrink to the distal end of the first traction member 31, the direction of the traction mechanism 30 moving in or out of the first accommodating cavity is the same as the second direction Y, and the first direction X intersects with the second direction Y.

[0055] In the embodiments of the present application, a member refers to one piece or an overall structure formed by mutual connection of multiple pieces.

[0056] The proximal end refers to the end close to the operator, and the distal end refers to the end away from the operator.

[0057] The elastic member 33 can be, but is not limited to, any one of a compression spring, a tensile spring or an elastic telescopic rod.

[0058] As an example, the elastic member 33 can be an elastic telescopic rod, which is a telescopic rod with a spring in the interior. When the elastic telescopic rod is contracted, the spring in the interior is compressed, and when the elastic telescopic rod is elongated, the spring in the interior releases the elastic force.

[0059] As an example, the elastic member 33 can be a tensile spring, which is located at the proximal end of the second traction member 32, one end of the tensile spring is hung with the first traction member 31, and the other end of the tensile spring is hung with the second traction member 32. When the limiting member 20 is in insertion with the first traction member 31 and the second traction member 32, the tensile spring is in a tensile state to release the elastic force when the limiting member 20 is in the unlimiting state, so that the second traction member 32 moves relative to the first traction member 31 to be able to pull the rope ring 3221 to retreat to the distal end of the first traction member 31, thereby clamping the suture line 40.

[0060] As an example, the inner wall of the first accommodating cavity is provided with a sliding groove extending along the first direction X, the limiting member 20 comprises a rod portion and a pressing portion, one end of the rod portion is connected with the pressing portion, at least part of the rod portion is located in the first accommodating cavity, the pressing portion is located outside the conveyor 10, part of the rod portion is located in the sliding groove and can move in the sliding groove along the first direction X. The rod portion is inserted into the first traction member 31 and the second traction member 32 along the first direction X, so as to limit the first traction member 31 and the second traction member 32 along the second direction Y. In another example, the sliding groove can be replaced by a guide hole, the first traction member 31 and the second traction member 32 are both provided with a insertion hole, and the rod portion is sequentially inserted into the guide hole and the insertion hole of the first traction member 31 and the second traction member 32 along the first direction X, so as to limit the first traction member 31 and the second traction member 32 along the second direction Y.

[0061] The conveyor 10 refers to a component used for conveying the suture thread 40 and the puncture needle 50 to the biological tissue P to be sutured during the operation process. The conveyor 10 is internally provided with the puncture needle 50 and the suture thread 40 connected with the distal end of the puncture needle 50. The puncture needle 50 extends from the distal end of the conveyor 10 and penetrates through the biological tissue P, so as to introduce the distal end of the suture thread 40 into the side of the biological tissue P opposite to the conveyor 10 for the suture operation.

[0062] By moving the limiting member 20, the limiting of the first traction member 31 and the second traction member 32 along the second direction Y can be released. Under the action of the elastic member 33, the grommet 3221 is withdrawn to the distal end of the first traction member 31, so as to clamp and fix the suture thread 40. Then, the first traction member 31 is pulled, and the suture thread 40 is pulled out of the patient's body. The action of manually pulling the grommet 3221 can be saved, the operation steps can be saved, and the operation efficiency can be improved.

[0063] In some embodiments, please refer to Figures 1-3 and Figures 7-9 The conveyor 10 comprises a delivery sheath 101 and a handle 102. The proximal end of the delivery sheath 101 is fixedly connected with the distal end of the handle 102. The delivery sheath 101 of the conveyor 10 is rotationally connected with a first clamping arm 60 and a second clamping arm 70. The first clamping arm 60 and the second clamping arm 70 jointly clamp the biological tissue P. The first clamping arm 60 and the second clamping arm 70 respectively adjust the respective rotation angles through a push-pull rod. The first clamping arm 60 and the second clamping arm 70 are respectively rotationally connected with the axes of the delivery sheath 101, which are parallel to each other. The push-pull rod is slidingly connected in the delivery sheath 101 and extends out of the proximal end of the delivery sheath 101.

[0064] The inside of the delivery sheath tube 101 is further formed with a puncture needle delivery channel 13 extending along the axial direction of the delivery sheath tube 101 and penetrating through the distal end of the second clamping arm 70, and the puncture needle delivery channel 13 forms a needle port at the distal end of the second clamping arm 70. A puncture needle 50 is slidably connected in the puncture needle delivery channel 13, the puncture needle 50 can pass through the needle port and penetrate through the biological tissue P, the proximal end of the puncture needle 50 is connected with an operating rod located in the handle 102 and extending out of the proximal end of the handle 102, the operating rod is slidably connected with the handle 102 along the axial direction of the operating rod, the suture delivery channel 11 is provided with a suture 40, the puncture needle 50 is a hollow needle, the inside of the puncture needle 50 is slidably connected with a push rod, the proximal end of the push rod can extend out of the handle 102, the puncture needle 50 is further provided with a clamping piece 41 located at the distal end of the push rod, and the suture 40 is connected with the clamping piece 41.

[0065] The first clamping arm 60 is provided with a puncture needle passing hole 61, the suture pulling channel 12 penetrates through the side wall of the puncture needle passing hole 61, the grommet 3221 is arranged around the puncture needle passing hole 61, the side surface of the first clamping arm 60 facing away from the biological tissue P is connected with an elastic gasket 80 which can be made of silicone or rubber, so that when the puncture needle 50 is withdrawn, the clamping piece 41 can be better retained on one side of the elastic gasket 80, when the grommet 3221 is withdrawn, the clamping piece 41 can be dragged from one side of the elastic gasket 80 to the other side by an external force, and the clamping piece 41 is dragged into the distal end of the pulling sleeve 312 to abut against the distal end of the pulling sleeve 312.

[0066] During the suturing operation, the grommet 3221 is delivered to the suturing area of the biological tissue P by the delivery device 10, the puncture needle 50 penetrates through the biological tissue P, at this time the grommet 3221 is sleeved on the puncture needle 50, the distal end of the suture 40 and the clamping piece 41 are sent to one side of the biological tissue P, the clamping piece 41 and the distal end of the suture 40 are left on one side of the biological tissue P by pushing the push rod, the puncture needle 50 is withdrawn, the limiting state of the pulling mechanism 30 and the delivery device 10 is released by moving the limiting piece 20, so that the elastic piece 33 provides a withdrawing force to the grommet 3221, the suture is clamped at the distal end of the first pulling member 31, the capturing operation of the suture 40 is completed, finally the pulling mechanism 30 is withdrawn as a whole, and the suture 40 is pulled out of the body to the outside of the body to complete the pulling operation of the suture 40, so as to facilitate subsequent operation.

[0067] In some embodiments, please refer to Figures 3-5The first traction member 31 comprises a first pull-back piece 311, and the first pull-back piece 311 is provided with a first clamping groove 3113 on the first side in the first direction X. The second traction member 32 comprises a second pull-back piece 321, and the second pull-back piece 321 is provided with a second clamping groove 3213 on the first side in the first direction X. The first clamping groove 3113 and the second clamping groove 3213 are both inserted with the limiting piece 20 in the first direction X.

[0068] The first clamping groove 3113 and the second clamping groove 3213 can be, but are not limited to, rectangular grooves, U-shaped grooves, or trapezoidal grooves.

[0069] The first clamping groove 3113 and the second clamping groove 3213 can be replaced by jack plugs.

[0070] In order to enable the first clamping groove 3113 and the second clamping groove 3213 to be inserted with the limiting piece 20, the first clamping groove 3113 is a through groove in the first direction X. By moving the second pull-back piece 321, the first clamping groove 3113 and the second clamping groove 3213 can be oppositely arranged. By moving the limiting piece 20, a part of the limiting piece 20 is moved into the first clamping groove 3113, and a part of the limiting piece 20 is moved into the second clamping groove 3213, so as to simultaneously limit the first pull-back piece 311 and the second pull-back piece 321 in the second direction Y. When the limiting piece 20 is moved, the limiting of the first pull-back piece 311 and the second pull-back piece 321 in the second direction Y is simultaneously released, and the limiting piece 20 is simultaneously separated from the first clamping groove 3113 and the second clamping groove 3213. At this time, the second pull-back piece 321 moves relative to the first pull-back piece 311 under the elastic force of the elastic piece 33, so as to pull the rope ring 3221 to shrink, thereby fixing the suture 40 to the distal end of the first traction member 31. Then, the traction mechanism 30 is operated to be withdrawn as a whole, the suture 40 is pulled out from the conveyor 10, and the traction operation of the suture 40 is completed.

[0071] In some embodiments, please refer to Figure 3 and Figure 4 The elastic piece 33 is a compression spring, one end of the compression spring abuts against the second traction member 32, and the other end of the compression spring abuts against the first traction member 31.

[0072] As an example, the compression spring can be arranged at the distal end of the second pull-back piece 321, and the two ends of the compression spring abut against the second pull-back piece 321 and the first pull-back piece 311.

[0073] Compared with the way of using a tensile spring, the compression spring used as the elastic piece 33 can simplify the structure of the elastic piece 33 and the connection between the elastic piece 33 and the first pull-back piece 311 and the second pull-back piece 321, so as to make the traction mechanism 30 more compact, thereby reducing the occupied space of the traction mechanism 30.

[0074] In some embodiments, please refer toFigure 3 The first traction member 31 comprises a first pullback member 311, and the second traction member 32 comprises a second pullback member 321. The first pullback member 311 has a guide groove 3114 extending along the second direction Y, and the second pullback member 321 is arranged in the guide groove 3114 and can slide in the guide groove 3114 along the second direction Y.

[0075] The cross-sectional profile of the guide groove 3114 can be, but is not limited to, a U shape, a rectangle, a trapezoid, or the like, and can be reasonably designed according to actual needs. The cross section of the guide groove 3114 is perpendicular to the second direction Y.

[0076] The arrangement of the guide groove 3114 can accommodate the second pullback member 321 in the first pullback member 311, so that the volume of the traction mechanism 30 can be made smaller to reduce the space occupied by the traction mechanism 30. At the same time, when the traction mechanism 30 is withdrawn as a whole, the probability of movement of the first pullback member 311 relative to the second pullback member 321 can be reduced, so as to reduce the probability of loosening of the rope ring 3221 and disengagement of the suture 40 from the distal end of the first traction member 31, thereby improving the success rate of the surgery.

[0077] In some embodiments, referring to Figure 3 The guide groove 3114 comprises a side wall parallel to the second direction Y, and the inner surface of the side wall is provided with a limiting groove 3115. The limiting groove 3115 comprises a first portion 31151, and the second pullback member 321 has a limiting portion 3214 located in the first portion 31151. The dimension of the first portion 31151 along the second direction Y is greater than the dimension of the limiting portion 3214 along the second direction Y.

[0078] The limiting groove 3115 can pass through the side wall along the thickness direction of the side wall, or can not pass through the side wall.

[0079] The limiting portion 3214 moves in the limiting groove 3115, which can limit the movement of the limiting portion 3214 along the first direction X and can guide the second pullback member 321. After the limiting member 20 releases the limitation on the first pullback member 311 and the second pullback member 321, the second pullback member 321 can move along a straight line in general, so as to reduce the probability of jamming of the second pullback member 321 during movement relative to the first pullback member 311, thereby improving the reliability of the traction mechanism 30.

[0080] In some embodiments, referring to Figure 3 The limiting groove 3115 further comprises a second portion 31152, which is in communication with the first portion 31151. The second portion 31152 passes through the end of the guide groove 3114 having a slot and forms an outlet. The limiting portion 3214 is configured to exit from the outlet, so that the second pullback member 321 is separated from the guide groove 3114.

[0081] When the cord loop 3221 needs to be replaced, the limiting portion 3214 can be moved out of the taking-out port, so as to separate the second pull-back member 321 from the first pull-back member 311, to take out the cord loop 3221 from the first traction member 31 for replacement, so that the traction mechanism 30 can continue to be used, thereby improving the service life of the traction mechanism 30.

[0082] In some embodiments, referring to Figure 3 and Figure 4 , the first traction member 31 further comprises a traction sleeve 312, the first pull-back member 311 is connected to the proximal end of the traction sleeve 312, the second traction member 32 further comprises a traction cord 322, the second pull-back member 321 is slidingly connected to the first pull-back member 311 in the second direction Y, the second pull-back member 321 is connected to the proximal end of the traction cord 322, and part of the traction cord 322 is located in the traction sleeve 312, the traction cord 322 extends out of the distal end of the traction sleeve 312 and forms the cord loop 3221.

[0083] The cord loop 3221 can be made in various ways. For example, the traction cord 322 can form the cord loop 3221 by binding at the distal end of the traction sleeve 312, or one or more cords can be folded in half, the cord head is connected to the second traction member 32 by passing through the proximal end of the traction sleeve 312, and the folded position of the cord is located outside the distal end of the traction sleeve 312 to form the cord loop 3221.

[0084] The connection between the first pull-back member 311 and the proximal end of the traction sleeve 312 can be detachable, which can be but is not limited to threaded connection, screw connection or crimping, etc. The connection between the first pull-back member 311 and the proximal end of the traction sleeve 312 can also be welding.

[0085] The connection between the second pull-back member 321 and the proximal end of the traction cord 322 can be connected by binding, clamping, fixing or winding, etc.

[0086] The traction sleeve 312 can be a flexible tube to adapt to the change of the blood vessel path in the body during the operation. In other examples, the traction sleeve 312 can be a rigid tube, which can be used in operations that do not require complex paths.

[0087] The arrangement of the traction sleeve 312 and the traction cord 322 can make the distal end of the first traction member 31 and the distal end of the second traction member 32 extend a long distance, so as to be moved from the blood vessel in the body to the suture position of the heart, thereby facilitating the cord loop 3221 to be able to set and pull out the suture line 40 from the body, to facilitate the operation.

[0088] In some embodiments, referring to Figure 3 and Figure 4The first pull member 311 is internally provided with a first channel 3112 penetrating through the distal end of the first pull member 311 along the second direction Y. The first pull member 311 is provided with a first insertion hole 3111 on one side along the first direction X, and the first insertion hole 3111 is in communication with the first channel 3112. The first pulling member 31 further comprises a first connecting member 313 and a first fastener 314. The first connecting member 313 is inserted into the first insertion hole 3111. The first connecting member 313 is internally provided with a second channel 3131, and the side wall of the second channel 3131 is provided with a first threaded hole 3132 penetrating through the outer surface of the first connecting member 313 along the first direction X. The first fastener 314 is threadedly connected with the first threaded hole 3132, and the first fastener 314 abuts against the pulling sleeve 312.

[0089] The first insertion hole 3111 can be a round hole or a special-shaped hole such as a directional hole, an oval hole or a polygonal hole.

[0090] The first fastener 314 includes but is not limited to a set screw, a screw rod or a screw.

[0091] As an example, the first fastener 314 is a set screw which is screwed into the first threaded hole 3132.

[0092] The first connecting member 313 can be generally in a columnar structure, one end of the columnar structure is provided with the first threaded hole 3132 which is a blind hole, the outer peripheral surface of the columnar structure is inserted into the first insertion hole 3111, and the second channel 3131 penetrates through the outer peripheral surface of the columnar structure and the first threaded hole 3132.

[0093] Therefore, when the pulling sleeve 312 is damaged or reaches a preset number of uses, the first fastener 314 can be loosened to replace the pulling sleeve 312, thereby prolonging the service life of the suturing device 100.

[0094] In some embodiments, referring to Figure 3 The first connecting member 313 is limitingly fitted with the first insertion hole 3111 along the circumferential direction of the first insertion hole 3111.

[0095] The first connecting member 313 can be limitingly fitted by special-shaped fitting. For example, the first connecting member 313 is a square column, the first insertion hole 3111 is a square hole, or the first connecting member 313 is a circular column, the outer peripheral surface of the first connecting member 313 is provided with a first limiting plane, the first insertion hole 3111 is a circular hole, and the inner surface of the first insertion hole 3111 is provided with a second limiting plane, the first limiting plane and the second limiting plane are limitingly fitted. The square column can be replaced by other special-shaped columns such as an elliptical column, a triangular column or other polygonal columns, and the first insertion hole 3111 is formed in the same profile shape as the special-shaped column.

[0096] The first connecting member 313 is in position-limiting cooperation with the first insertion hole 3111, so as to limit the rotation of the first connecting member 313, to prevent the traction sleeve 312 from rotating with the first connecting member 313, to avoid the bending of the traction sleeve 312, and to reduce the probability of damage of the traction sleeve 312, and to improve the reliability of the operation of the suturing device 100.

[0097] In some embodiments, referring to Figure 3 and Figure 4 , the second pulling member 321 is internally provided with a third channel 3211 penetrating through the distal end of the second pulling member 321 along the second direction Y, the second pulling member 321 is provided with a second insertion hole 3212, and the second traction member 32 further comprises a clamping member 323 clamped with the traction rope 322.

[0098] As an embodiment, referring to Figure 6 , the second insertion hole 3212 is located at the proximal end of the second traction member 32. The clamping member 323 comprises a first clamping portion 3233 and a second clamping portion 3234, the first clamping portion 3233 and the second clamping portion 3234 are buckled, the first clamping portion 3233 forms a conical structure, the first insertion hole 3111 is a conical hole, the diameter of the proximal end of the conical hole is larger than the diameter of the distal end of the conical hole, the conical structure is inserted into the conical hole, and the first clamping portion 3233 and the second clamping portion 3234 jointly clamp the traction rope 322 by using the interference fit force between the conical structure and the conical hole. In order to fix the traction rope 322 more firmly, a knot can be arranged at the proximal end of the traction rope 322.

[0099] By arranging the clamping member 323, the traction rope 322 can be fixed to the second pulling member 321, so that the second pulling member 321 can pull the rope ring 3221 of the traction rope 322 to shrink into the traction sleeve 312 to fix the suture line 40 during the elastic recovery of the elastic member 33, so as to achieve the capture of the suture line 40.

[0100] In other embodiments, referring to Figure 3 and Figure 4The second insertion hole 3212 is located on one side of the second pull-back member 321 along the first direction X. The clamping member 323 comprises a second connecting member 3231 and a second fastener 3232. The second connecting member 3231 is inserted into the second insertion hole 3212. The second connecting member 3231 has a fourth channel 32311 formed in the interior thereof. The fourth channel 32311 is in communication with the third channel 3211. The side wall of the fourth channel 32311 has a second threaded hole 32312 formed therethrough and extending to the outer surface of the second connecting member 3231. The second fastener 3232 is screwed into the second threaded hole 32312. The second fastener 3232 is in contact with the side wall of the fourth channel 32311 to clamp the traction rope 322.

[0101] The second fastener 3232 can be, but is not limited to, a set screw, a screw rod, or a screw.

[0102] For example, the second fastener 3232 is a set screw which is screwed into the second threaded hole 32312.

[0103] Therefore, when the traction rope 322 is damaged or reaches the preset number of uses, the second fastener 3232 can be loosened to replace the traction rope 322, thereby prolonging the service life of the suturing device 100.

[0104] In some embodiments, referring to Figure 3 The second connecting member 3231 is in limiting cooperation with the second insertion hole 3212 along the circumferential direction of the second insertion hole 3212.

[0105] The second connecting member 3231 can be in limiting cooperation through profiled cooperation. For example, the second connecting member 3231 is a square column, and the second insertion hole 3212 is a square hole. Alternatively, the second connecting member 3231 is a circular column, and the outer circumferential surface of the second connecting member 3231 has a third limiting plane. The second insertion hole 3212 is a circular hole, and the inner surface thereof has a fourth limiting plane. The third limiting plane and the fourth limiting plane are in limiting cooperation. The square column can be replaced by other profiled columns, such as an elliptical column, a triangular column, or other polygonal columns. The second insertion hole 3212 has a profile shape substantially the same as that of the profiled column.

[0106] The limiting cooperation between the second connecting member 3231 and the second insertion hole 3212 can limit the rotation of the second connecting member 3231, so as to prevent the traction rope 322 from rotating with the second connecting member 3231. This can better control the length of the traction rope 322 and reduce the probability that the rope ring 3221 deviates from the predetermined position due to the rotation of the traction rope 322 with the second connecting member 3231, thereby improving the reliability of the suture 40 catching.

[0107] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them. Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some or all of the technical features can be replaced equivalently. Such modifications or replacements do not change the essence of the corresponding technical solutions, which should be covered in the scope of the present application. In particular, the technical features mentioned in each embodiment can be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A suturing device, characterized by, The device comprises: a delivery device, which has a suture pulling channel and a first accommodating cavity in the interior, and is provided with a pulling port, the suture pulling channel and the pulling port being in communication with the first accommodating cavity, respectively; a limiting member, a part of which is located in the first accommodating cavity, and which is in sliding connection with the delivery device in a first direction; a pulling mechanism, which comprises a first pulling member, a second pulling member and an elastic member, the first pulling member and the second pulling member being in sliding connection in a second direction, one end of the elastic member being in cooperation with the first pulling member, the other end of the elastic member being in cooperation with the second pulling member, a part of the first pulling member being sleeved on the second pulling member, and the second pulling member extending from the distal end of the first pulling member and forming a rope loop for sleeving a suture, the rope loop being arranged in the suture pulling channel, the first pulling member and the second pulling member being in insertion with the limiting member in the second direction, the elastic force of the elastic member having a tendency to contract the rope loop towards the distal end of the first pulling member, the direction of the pulling mechanism moving in or out of the first accommodating cavity being the same as the second direction, and the first direction intersecting the second direction.

2. The suturing device of claim 1, wherein, The elastic member is a compression spring, one end of the compression spring being in abutment with the second pulling member, and the other end of the compression spring being in abutment with the first pulling member.

3. The suturing device of claim 1, wherein, The first pulling member comprises a first pullback member, and the second pulling member comprises a second pullback member, the first pullback member having a guide groove extending in the second direction, and the second pullback member being arranged in the guide groove and being capable of sliding in the second direction in the guide groove.

4. The suturing device of claim 3, wherein, The guide groove comprises a side wall, the side wall being parallel to the second direction, and an inner surface of the side wall being provided with a limiting groove, the limiting groove comprising a first part, and the second pullback member having a limiting part, the limiting part being located in the first part, and the size of the first part in the second direction being greater than the size of the limiting part in the second direction.

5. The suturing device of claim 4, wherein, The limiting groove further comprises a second part, the second part being in communication with the first part, and one end of the second part having a slot opening through the guide groove and forming a taking-out port, and the limiting part being configured to exit from the taking-out port to separate the second pullback member from the guide groove.

6. The suturing device of claim 1, wherein, The first pulling member comprises a first pullback member and a pulling sleeve, the first pullback member being connected with the proximal end of the pulling sleeve, the second pulling member comprises a second pullback member and a pulling rope, the second pullback member being in sliding connection with the first pullback member in the second direction, the second pullback member being connected with the proximal end of the pulling rope, and a part of the pulling rope being located in the pulling sleeve, the pulling rope extending from the distal end of the pulling sleeve and forming the rope loop.

7. The suturing device of claim 6, wherein, The pulling sleeve is detachably connected with the first pullback member.

8. The suturing device of claim 7, wherein, The first pull-back member is internally provided with a first channel, the first channel penetrates the distal end of the first pull-back member along the second direction, the first pull-back member is provided with a first insertion hole on one side along the first direction, the first insertion hole is in communication with the first channel, and the first pull-back member further comprises: a first connecting member which is inserted into the first insertion hole, the first connecting member is internally provided with a second channel, the side wall of the second channel is provided with a first threaded hole, and the first threaded hole penetrates the outer surface of the first connecting member along the first direction; a first fastener which is threadedly connected with the first threaded hole and abuts against the traction sleeve.

9. The suturing device according to claim 6, wherein, The second pull-back member is internally provided with a third channel, the third channel penetrates the distal end of the second pull-back member along the second direction, and the second pull-back member is provided with a second insertion hole, and the second pull-back member further comprises: a clamping member which is inserted into the second insertion hole and clamps the traction rope.

10. The suturing device of claim 9, wherein, The second insertion hole is located on one side of the second pull-back member along the first direction, and the clamping member comprises: a second connecting member which is inserted into the second insertion hole, the second connecting member is internally provided with a fourth channel, the fourth channel is configured to be in communication with the third channel, the side wall of the fourth channel is provided with a second threaded hole, and the second threaded hole penetrates the outer surface of the second connecting member; a second fastener which is threadedly connected with the second threaded hole and is used for clamping the traction rope with the side wall of the fourth channel.

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