CN214017664U - Medical hasp and medical locking device - Google Patents

Abstract

The utility model provides a medical hasp and medical knot device. The medical lock catch comprises a lock catch main body, a wire locking piece, a push rod and a position locking structure. The wire locking piece is movably arranged in the lock catch main body; the distal end of the push rod abuts the wire locking member. The push rod drives the wire locking piece to move in the lock catch main body so that the medical wire is clamped between the lock catch main body and the wire locking piece, the position locking structure can keep abutting against or drawing the push rod, the far end of the push rod abuts against the wire locking piece, therefore, the relative position of the wire locking piece and the lock catch main body can be prevented from changing, a gap between the wire locking piece and the lock catch main body for clamping the medical wire is kept, the medical wire is effectively prevented from loosening from the position between the wire locking piece and the lock catch main body, and therefore firm locking of the medical wire is achieved.

Description

Medical hasp and medical locking device

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to a medical hasp and be provided with medical knot device of medical hasp.

Background

The operation steps of knotting and fixing medical wires (such as suture lines, repair wires used as artificial chordae tendineae, repair wires for performing edge-to-edge repair on valves and the like) are often required in the operation, and the traditional surgical operation is operated under the condition of open-cut direct vision, and is usually knotted manually by a doctor. However, with the advance of technology, various minimally invasive and interventional procedures, such as laparoscopic procedures, transcatheter interventional procedures, etc., are becoming more common, which require a small operating window to be cut in the patient's body, whereby an instrument, such as an endoscope or interventional catheter, is inserted into the patient's body to a predetermined site for treatment. In such a surgery, if knotting or fixing operation of the medical thread in the patient is required, an operator is usually required to perform remote operation outside the patient through a small operation window to knot the medical thread in the patient.

The prior art discloses a medical lock catch, wherein a hollow inner cavity is arranged in a lock catch main body, and a locking pin moves along the axial direction of the inner cavity, so that a gap between the locking pin and the inner surface of the inner cavity is gradually reduced to fix a suture thread penetrating through the inner cavity. However, since the suture thread is formed by gradually reducing the gap between the locking pin and the inner surface of the inner cavity and pressing the suture thread to complete locking between the locking pin and the inner surface of the inner cavity, the suture thread is continuously pulled during and after the operation, so that the locking pin and the locking buckle body are easily moved relatively, the gap between the locking pin and the inner surface of the inner cavity is increased, the locking force on the suture thread is reduced, and even the suture thread is loosened from the locking buckle and falls off from the locking buckle, thereby causing a certain risk to the human body.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in, to prior art's defect, provide a medical hasp and be provided with the medical knot device of medical hasp.

In order to solve the technical problem, the utility model firstly provides a medical lock catch for locking a medical line, which comprises a lock catch main body, a line locking piece, a push rod and a position locking structure; the wire locking piece is movably arranged in the lock catch main body, and the far end of the push rod is abutted against the wire locking piece so as to drive the wire locking piece to move in the lock catch main body, so that the medical wire is clamped between the lock catch main body and the wire locking piece; under the state that the medical wire is clamped, the position locking structure pushes or pulls the push rod so as to keep the relative position of the wire locking piece and the lock catch main body.

Preferably, an accommodating space and a threading groove communicated with the accommodating space are formed in the lock catch main body, the thread locking piece comprises a pressing roller movably accommodated in the accommodating space, and the medical thread penetrates between the threading groove and the pressing roller; and in the process that the push rod moves from the near end of the lock catch main body to the far end of the lock catch main body, the press roller is driven to move in the accommodating space, so that the gap between the press roller and the bottom surface of the threading groove is gradually reduced.

Preferably, a guide rail or a guide groove is arranged on the side wall of the lock catch main body corresponding to the accommodating space, and the guide rail or the guide groove extends from the near end of the accommodating space to the far end of the accommodating space and gradually approaches to the bottom surface of the threading groove; the wire locking piece further comprises rolling shafts connected to two sides of the pressing roller, and the rolling shafts are matched with the guide rails or the guide grooves.

Preferably, the diameter value of the compression roller, the diameter value of the medical thread, the height value of the distal end of the guide groove or the guide rail, and the maximum height value of the bottom surface of the threading groove from the distal end of the guide groove or the guide rail satisfy: h is not less than 0₁-H₂/2-D₁/2≤D₂Wherein H is₁Represents the maximum height value H of the bottom surface of the threading groove from the far end of the guide groove or the guide rail₂Representing a height value, D, of the distal end of the channel₁Representing the diameter value of the press roll, D₂Representing a diameter value of the medical wire.

Preferably, the proximal end of the push rod is connected to a first connector, and the first connector is exposed out of the latch body.

Preferably, the lock catch main body is provided with a limiting structure, and the limiting structure is used for preventing the lock catch main body from moving in the process that the push rod drives the wire locking piece to move in the lock catch main body.

Preferably, the position locking structure comprises a screw hole axially penetrating through the lock catch body, and a transmission thread arranged on at least part of the outer surface of the push rod, wherein the transmission thread is matched with the screw hole.

Preferably, the position locking structure further comprises a stopper connected to a distal end of the locker body, the stopper defining an extreme position of a distal end of the wire locking member.

Preferably, the position locking structure includes along axial break-through the hasp main part is in order to supply the through-hole that the push rod activity passed and cover establish elastic component on the push rod, the one end butt of elastic component the periphery of through-hole, the other end butt the distal end of push rod or connect the near-end of push rod.

Preferably, the position locking structure further comprises a stopper connected to a distal end of the locker body, the stopper defining an extreme position of a distal end of the wire locking member.

The utility model also provides a medical knot device includes at least medical hasp and control the subassembly, control the subassembly with the connection can be dismantled to the near-end of push rod, it is used for control to control the subassembly the action of push rod, just control the subassembly and be in the push rod with the relative position of hasp main part keep unchanged the back with the near-end separation of push rod.

Preferably, still include spacing subassembly, spacing subassembly can dismantle connect in the hasp main part, spacing subassembly with locate spacing structure in the hasp main part cooperatees to the push rod drive the line locking piece is in the in-process of the internal motion of hasp main part prevents the axial displacement from taking place for the hasp main part, just spacing subassembly is in control the subassembly with the proximal end separation of push rod before with the hasp main part separation.

Preferably, the multifunctional electric bicycle further comprises a supporting pipe assembly, the lock catch main body is movably arranged in the far end of the supporting pipe assembly in a penetrating mode, and the control assembly and the limiting assembly are movably arranged in the supporting pipe assembly in a penetrating mode and extend out of the near end of the supporting pipe assembly.

Preferably, the support tube assembly comprises a sleeve, a connecting cylinder and an outer tube which are sequentially connected from the far end to the near end; the lock catch main body is movably arranged in the sleeve in a penetrating mode, and the sleeve is matched with a limiting structure arranged on the lock catch main body so as to prevent the lock catch main body from rotating in the process that the push rod drives the wire locking piece to move in the lock catch main body; a lumen is disposed within the connector barrel surrounding a distal end of the steering assembly.

Preferably, the control assembly comprises a first inner core and a connecting rod connected to the distal end of the first inner core, and the distal end of the connecting rod is detachably connected with the proximal end of the push rod; the limiting assembly comprises a second inner core and a limiting screw connected to the far end of the second inner core, the limiting structure arranged on the lock catch main body comprises a limiting screw hole arranged along the axial direction, and the limiting screw is in threaded connection with the limiting screw hole.

Preferably, the control assembly further comprises a first control button fixedly connected to the proximal end of the first inner core, and a first barrel member sleeved outside the first inner core and detachably connected to the first control button; the limiting assembly further comprises a second control button fixedly connected with the near end of the second inner core and a second barrel part sleeved outside the second inner core and fixedly connected with the second control button.

Preferably, the handle comprises a handle shell, the proximal end of the outer tube is fixedly connected to the inside of the handle shell, and the first inner core and the second inner core extend in the handle shell; the first barrel part is partially arranged in the handle shell, a first retaining ring is arranged on the first barrel part, a first baffle plate and a second baffle plate are arranged in the handle shell at intervals, and the first retaining ring is positioned between the first baffle plate and the second baffle plate; the part of the second cylinder piece is arranged in the handle shell, a second retainer ring is arranged on the second cylinder piece, a third baffle and a fourth baffle are arranged in the handle shell at intervals, and the second retainer ring is positioned between the third baffle and the fourth baffle.

The utility model provides a medical hasp and be provided with medical knot device of medical hasp owing to be provided with the position locking structure the push rod drive the line locking piece is in the hasp main part internal motion is so that medical line is pressed from both sides tightly in the hasp main part with back between the line locking piece, the position locking structure can keep supporting or tractive the push rod, the distal end of push rod is the butt again the line locking piece, thereby can prevent the line locking piece with the relative position of hasp main part changes, keeps the line locking piece with can press from both sides tightly between the hasp main part the clearance of medical line effectively prevents the medical line is followed line locking piece with pine takes off between the hasp main part, thereby it is right to realize the firm knot of medical line.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural view of a first embodiment of the medical locking device of the present invention.

Fig. 2 is a schematic perspective view of a first embodiment of the locking buckle of fig. 1.

Fig. 3 is a perspective exploded view of the medical fastener of fig. 2.

Fig. 4 is a perspective view of the latch body of fig. 3.

Fig. 5 is a cross-sectional view of the latch body and stop of fig. 3.

Fig. 6 is a schematic view of the end structure of the medical lock of fig. 2 with the stopper omitted.

Fig. 7 is a side view of the medical lock of fig. 2 in an initial state.

Fig. 8 is a side view of the locked state of the medical fastener of fig. 2.

Fig. 9 is a sectional view of the medical fastener of fig. 2 in an initial state.

Fig. 10 is a sectional view showing a locked state of the medical fastener of fig. 2.

Fig. 11 is a perspective view of a handle housing of the medical knotting device of fig. 1.

Fig. 12 is a perspective view of the handle shell of fig. 11 with the upper shell removed.

Fig. 13 is a cross-sectional view taken along line XIII-XIII in fig. 1.

Fig. 14 is a cross-sectional view of the steering assembly of fig. 12.

Fig. 15 is a perspective view of the stop assembly of fig. 12.

Fig. 16 is a perspective view of the medical fastener of fig. 13 and a portion of the first core and a portion of the second core.

Fig. 17-26 are schematic views illustrating a procedure of using the medical locking device according to the first embodiment of the present invention, wherein fig. 17 is a schematic view illustrating a suture sewn on the tricuspid valve; FIG. 19 is an enlarged, cross-sectional view of the distal portion of the keying device of FIG. 18; fig. 20 illustrates the medical stapling device approaching the tricuspid valve along a suture; FIG. 22 is an enlarged cross-sectional view of the distal portion of the keying device of FIG. 21; FIG. 24 is an enlarged, cross-sectional view of the distal portion of the keying device of FIG. 23; fig. 26 is an enlarged schematic view at XXVI in fig. 25.

Fig. 27 is a schematic perspective view of a second embodiment of the medical lock of the present invention.

Fig. 28 is an exploded perspective view of the medical fastener of fig. 27.

Fig. 29 is a side view of the medical fastener of fig. 27 in an initial state.

Fig. 30 is a side view of the locked state of the medical fastener of fig. 27.

Fig. 31 is a sectional view of the medical fastener of fig. 27 in an initial state.

Fig. 32 is a sectional view showing a locked state of the medical fastener of fig. 27.

Fig. 33-38 are schematic views illustrating a process of using the medical locking device according to the second embodiment of the present invention; wherein fig. 34, fig. 36, fig. 38 illustrate the state of the distal end of the medical locking device, and fig. 33, fig. 35, fig. 37 illustrate the operation state on the handle case corresponding to fig. 34, fig. 36, fig. 38, respectively.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without any creative effort belong to the protection scope of the present invention.

Furthermore, the following description of the various embodiments refers to the accompanying drawings, which are included to illustrate specific embodiments in which the invention may be practiced. Directional phrases used in this disclosure, such as "upper," "lower," "front," "rear," "left," "right," "inner," "outer," "side," and the like, refer only to the orientation of the attached drawing figures and, thus, are used in a better and clearer sense to describe and understand the present invention rather than to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered limiting of the invention.

Orientation definition: for clarity of description, the end of the surgical procedure that is closer to the operator will be referred to hereinafter as the "proximal end" and the end that is further from the operator will be referred to hereinafter as the "distal end"; the axial direction is parallel to the direction of the connection line of the center of the far end and the center of the near end of the medical instrument; the foregoing definitions are for convenience only and are not to be construed as limiting the present invention.

Referring to fig. 1 to 3 and 7 to 10, a medical locking device 100 according to a first embodiment of the present invention includes a medical lock 20, a handle housing 40, a control assembly 50, a support tube assembly 70, and a position limiting assembly 80. The medical lock 20 is used for locking the medical thread 300 (the medical thread 300 may be a suture thread used for suturing an incision or a laceration, or a suture thread used for performing edge-to-edge repair on a heart valve, a repair thread used as an artificial chordae tendineae, or a suture thread implanted in internal tissues of a human body such as an annulus, etc., the material of the medical thread 300 includes but is not limited to PTFE, e-PTFE, PET, UHMWPE, etc.), the medical lock 20 includes a lock main body 21, a thread locking piece 23, a push rod 25 and a position locking structure 27, the thread locking piece 23 is movably arranged in the lock main body 21, the distal end of the push rod 25 abuts against the thread locking piece 23, and the control assembly 50 controls the push rod 25 to act to drive the thread locking piece 23 to move in the lock main body 21, so that the medical thread 300 is clamped between the lock main body 21 and the thread locking piece 23; the position locking structure 27 is engaged with the push rod 25, and in a state that the medical wire 300 is clamped by the latch main body 21 and the wire locking member 23, the position locking structure 27 abuts against the push rod 25 to keep the relative position of the wire locking member 23 and the latch main body 21 unchanged. The distal end of the manipulating member 50 is detachably connected to the proximal end of the push rod 25, the proximal end extends out of the handle housing 40, and the manipulating member 50 is separated from the push rod 25 after the relative position of the locking wire member 23 and the locking main body 21 is maintained. The support tube assembly 70 extends distally from the handle housing 40 for receiving the medical fastener 20, the steering assembly 50 and the stop assembly 80. The distal end of the limiting component 80 is detachably connected to the latch body 21, and the proximal end extends out of the handle housing 40 for cooperating with a limiting structure provided on the latch body 21 to prevent the latch body 21 from moving during the process that the push rod 25 drives the wire locking member 23 to move in the latch body 21.

According to the medical lock 20 and the medical locking device 100, due to the arrangement of the position locking structure 27, after the push rod 25 drives the wire locking piece 23 to move in the lock main body 21 so that the medical wire 300 is clamped between the lock main body 21 and the wire locking piece 23, the position locking structure 27 can keep abutting against the push rod 25, the far end of the push rod 25 abuts against the wire locking piece 23, even if the medical wire 300 is pulled, the relative position of the wire locking piece 23 and the lock main body 21 can be prevented from changing, the lock main body 21 and the wire locking piece 23 cannot loosen, a gap between the wire locking piece 23 and the lock main body 21 for clamping the medical wire 300 is kept, the medical wire 300 is effectively prevented from being loosened from the lock wire piece 23 and the lock main body 21, and therefore the medical wire 300 is firmly locked.

Specifically, referring to fig. 2 to 4, the lock catch body 21 is provided with an accommodating space 210 and a threading groove 211 communicating with the accommodating space 210, the threading member 23 includes a pressing roller 230 movably accommodated in the accommodating space 210, and the medical thread 300 is threaded between the threading groove 211 and the pressing roller 230; during the movement of the push rod 25 from the proximal end of the locking main body 21 to the distal end of the locking main body 21, the driving pressure roller 230 moves in the accommodating space 210 to change the position relative to the locking main body 21, so that the gap between the outer circumferential surface of the pressure roller 230 and the bottom surface of the threading groove 211 is gradually reduced until the medical thread 300 threaded in the gap is clamped.

The latch body 21 includes a distal end surface 212, a proximal end wall 213, and two opposite first side walls 214 and two opposite second side walls 215 located between the distal end surface 212 and the proximal end wall 213, wherein outer surfaces of the two first side walls 214 are parallel and opposite planes, and outer surfaces of the two second side walls 215 are opposite arc surfaces. The accommodating space 210 is defined by two first sidewalls 214, two second sidewalls 215 and a proximal end wall 213, and a distal end of the accommodating space 210 penetrates through a distal end surface 212 of the latch body 21. The threading groove 211 is communicated with the accommodating space 210, specifically, the threading groove 211 is recessed downward from an inner surface of one of the second sidewalls 215 (shown in fig. 4), and support platforms 2150 are respectively disposed at two opposite sides of the threading groove 211 in the latch body 21. The threading groove 211 extends along the axial direction, one end of the threading groove 211 penetrates through the distal end surface 212 of the lock catch main body 21, the other end of the threading groove 211 penetrates through the notch 216 arranged at the near end of the lock catch main body 21, and the medical thread 300 extends out of the notch 216 after passing through the threading groove 211.

In this embodiment, the lock main body 21 is provided with two guide grooves 2140 aligned with each other corresponding to the two first sidewalls 214, and the guide grooves 2140 extend from a side of the proximal end of the accommodating space 210 away from the notch 216 to the distal end of the accommodating space 210 and gradually approach to the bottom surfaces of the support platform 2150 and the threading groove 211. The wire locking member 23 further includes a roller 232 connected to the pressing roller 230, and the roller 232 is fitted into the guide groove 2140. Further, the guide channel 2140 intersects the distal end of the support platform 2150 and extends distally along the support platform 2150 and through the distal face 212 of the latch body 21. The contour of the guide groove 2140 is preferably curved toward the side where the threading groove 211 is located. The shape of the pressing roller 230 is generally cylindrical, the pressing roller 230 is fixedly sleeved in the middle of the roller 232, the pressing roller 230 and the roller 232 have a coaxial axis, that is, two opposite ends of the roller 232 extend out of two opposite end faces of the pressing roller 230 along the axial direction of the pressing roller 230. The opposite ends of the roller 232 are respectively connected with a blocking piece 234, and the radial dimension of the blocking piece 234 along the roller 232 is larger than the width of the guiding groove 2140, so as to prevent the wire locking member 23 from greatly swaying in the accommodating space 210 of the locking main body 21.

In some other embodiments, since the diameter of the pressing roller 230 is larger than the width of the guiding groove 2140, the blocking pieces 234 at the opposite ends of the roller 232 can be omitted.

In some other embodiments, the side wall of the locking body 21 corresponding to the accommodating space 210 may be provided with a guide rail (not shown) instead of the guide groove 2140, the guide rail extends from the proximal end of the accommodating space 210 to the distal end of the accommodating space 210 and gradually approaches the bottom surface of the threading groove 211, and the roller 23 is adapted to the guide rail. Further, two opposite guide rails are disposed on the two first sidewalls 214 of the locking device body 21, and each guide rail extends from a side of the proximal end of the accommodating space 210 away from the notch 216 to the distal end of the accommodating space 210 and gradually approaches the threading slot 211. The two opposite ends of the roller 232 can be respectively arranged on the two guide rails in a rolling manner, the roller 232 rolls along the guide rails to drive the compression roller 230 to roll, and the compression roller 230 is gradually close to the bottom surface of the threading groove 211, so that the medical thread 300 passing through the threading groove 211 is clamped between the compression roller 230 and the bottom surface of the threading groove 211.

Referring to fig. 5 and 6 together, the diameter value of the pressing roller 230, the diameter value of the medical thread 300, the height value of the distal end of the guide groove 2140, and the maximum height value of the bottom surface of the thread passing groove 211 from the distal end of the guide groove 2140 satisfy: h is not less than 0₁-H₂/2-D₁/2≤D₂Wherein H is₁Represents the maximum height value, H, of the bottom surface of the threading groove 211 from the distal end of the guide groove 2140₂Indicates a height value, D, of the distal end of the guide groove 2140₁Representing the diameter value of the press roll, D₂Representing a diameter value of the medical wire. Specifically, when the pressing roller 230 clamps the medical thread 300 with the bottom surface of the threading groove 211, a gap a between a portion of the outer circumferential surface of the pressing roller 230 closest to the bottom surface of the threading groove 211 and the bottom surface of the threading groove 211 is equal to 1/2, which is a maximum height of the bottom surface of the threading groove 211 from the distal end of the guide groove 2140 minus a height of the distal end of the guide groove 2140, and 1/2, which is a value of the diameter of the pressing roller 230, i.e., H ═ a₁-H₂/2-D₁2; in order to firmly clamp the medical wire 300 threaded in the gap a between the outer circumferential surface of the pressing roller 230 and the bottom surface of the threading groove 211, the diameter of the gap a cannot be larger than the diameter of the medical wire 300. The length value W of the press roll 230 in the axial direction thereof₁Width W less than or equal to the threading groove 211₂So that the pressing roller 230 can be freely introduced into the threading groove 211. When the push rod 25 pushes the pressing roller 230 axially and distally, the roller 232 is guided by the guide groove 2140 to approach the bottom surface of the threading groove 211 while rolling in the guide groove 2140, and drives the pressing roller 230 to approach the bottom surface of the threading groove 211 until the medical thread 300 in the threading groove 211 is locked between the outer circumferential surface of the pressing roller 230 and the bottom surface of the threading groove 211.

As shown in fig. 2, fig. 3, fig. 5, fig. 9 and fig. 10, in the present embodiment, the proximal end wall 213 of the locking main body 21 is provided with a locking screw hole 2131 and a limiting screw hole 2133 which are spaced apart from each other, the locking screw hole 2131 is closer to the middle position of the proximal end wall 213 than the limiting screw hole 2133, and preferably, the locking screw hole 2131 is coaxial with the locking main body 21. The locking screw hole 2131 and the limiting screw hole 2133 extend axially, and the locking screw hole 2131 is communicated with the accommodating space 210. The push rod 25 includes a rod body 251 and a radial protrusion 253 disposed at a distal end of the rod body 251, the diameter of the radial protrusion 253 is larger than that of the rod body 251, a transmission thread 255 is disposed on the rod body 251, and the transmission thread 255 is screwed with the locking screw hole 2131 of the locking main body 21. When the push rod 25 is rotated, the transmission thread 255 spirally moves in the locking screw hole 2131, the push rod 25 synchronously and axially moves relative to the lock catch main body 21, the press roller 230 is pushed to move towards the far end, and the press roller 230 gradually approaches to the bottom surface of the threading groove 211 until the medical thread 300 between the press roller 230 and the threading groove 211 is pressed by the two; after that, the rotation of the push rod 25 is stopped, the far end of the push rod 25 is pressed against the press roller 230 to receive the axial acting force of the press roller 230 on the push rod, so that the transmission thread 255 on the push rod 25 and the thread on the locking screw hole 2131 are mutually extruded to realize self-locking, the relative position of the press roller 230 and the threading groove 211 can be kept, even if the medical thread 300 is pulled, the position of the press roller 230 cannot be changed, the gap between the press roller 230 and the threading groove 211 for clamping the medical thread 300 is kept, the medical thread 300 is prevented from being loosened, and the medical thread 300 is kept firmly locked. That is, in the present embodiment, the position locking structure 27 includes a locking screw hole 2131 of the lock main body 21 and a driving screw 255 of the push rod 25.

The position locking structure 27 further includes a stopper 29 to define a distal limit position of the wire locking member 23, stopping the wire locking member 23 from being disengaged from the locker body 21. As shown in fig. 2 and 3, the stopper 29 includes a blocking plate 291 and two catching blocks 293 protruding from two opposite sides of a proximal end surface of the blocking plate 291, the proximal end surface of the blocking plate 291 abuts against the distal end surface 212 of the lock main body 21, the two catching blocks 293 are respectively caught in distal openings of two guide grooves 2140 of the lock main body 21, the catching blocks 293 are used for stopping the roller 232 from continuously rolling distally in the guide grooves 2140, and the blocking plate 291 is used for limiting a distal limit position of the pressing roller 230. Furthermore, a threading hole 295 is formed in the baffle 291, the threading hole 295 is communicated with the threading groove 211 of the lock catch main body 21, and the medical thread 300 is threaded in the threading groove 211 through the threading hole 295.

Further, as shown in fig. 3, a first connector 28 is further connected to the proximal end of the push rod 25, and the first connector 28 is exposed outside the latch body 21 after the push rod 25 is mounted to the latch body 21. Specifically, the proximal end face of the push rod 25 is provided with a fixing hole 256 for fixedly connecting the first joint 28. The first joint 28 includes a connecting portion 281 and a fixing post 283 disposed at a distal end of the connecting portion 281, and the fixing post 283 and the fixing hole 256 may be fixedly connected by screwing, welding, or the like. The connecting portion 281 is detachably connected to a distal end of the first core 51 in the manipulating assembly 50 described later. In other embodiments, the first connector 28 and the push rod 25 may be integrally formed.

The limiting screw hole 2133 on the lock catch main body 21 and the two first side walls 214 form a limiting structure, wherein the limiting screw hole 2133 is in threaded connection with a limiting screw 83 at the distal end of a limiting assembly 80, which will be described later, so as to prevent the lock catch main body 21 from moving axially in the process that the push rod 25 drives the wire locking piece 23 to move in the lock catch main body 21; the flat surfaces of the two first side walls 214 are engaged with corresponding flat surfaces in the inner cavity of the sleeve 71 of the support tube assembly 70, which will be described later, to prevent the latch body 21 from rotating during the movement of the wire locking member 23 in the latch body 21 driven by the push rod 25.

Referring to fig. 7 to 10, when the medical lock buckle 20 is used, a group of medical wires 300 is threaded between the outer circumferential surface of the pressing roller 230 and the bottom surface of the threading groove 211, the first joint 28 is driven to rotate, so that the push rod 25 moves axially and distally relative to the rotation edge of the locking screw hole 2131, the radial protrusion 253 of the push rod 25 pushes the pressing roller 230 to drive the threading locking piece 23 to move along the guide groove 2140 toward the baffle 291 and the bottom surface of the threading groove 211, and the gap between the outer circumferential surface of the pressing roller 230 and the bottom surface of the threading groove 211 is gradually reduced until the medical wires 300 are clamped between the outer circumferential surface of the pressing roller 230 and the bottom surface of the threading groove 211; thereafter, due to the screw locking between the driving screw 255 of the push rod 25 and the locking screw hole 2131, the relative position between the locking main body 21 and the wire locking member 23 can be prevented from changing, and the medical wire 300 can be prevented from being loosened from between the wire locking member 23 and the locking main body 21.

In this embodiment, the locking device body 21, the wire locking member 23 and the push rod 25 can be made of, but not limited to, a biocompatible metal material such as stainless steel, nickel titanium, pure titanium, etc.

As shown in fig. 11 and 12, the handle case 40 includes an upper case 41 and a lower case 42 which are engaged with each other, and a front screw 43 which is screw-engaged with the upper case 41 and the lower case 42. An outer tube fixing member 44 is fixedly installed in the inner cavity of the lower shell 42, and the proximal end of the outer tube 75 in the support tube assembly 70 is fixedly connected with the outer tube fixing member 44. The handle case 40 is provided with first and second shutters 46 and 47 provided at intervals, and third and fourth shutters 48 and 49 provided at intervals. Specifically, the first baffle 46 and the second baffle 47 are disposed in the middle of the proximal end of the inner cavity of the lower shell 42, and the third baffle 48 and the fourth baffle 49 are disposed in the proximal end of the inner cavity of the lower shell 42 near the middle.

Please refer to fig. 1, and fig. 11 to 16: the lock catch main body 21 is movably arranged at the far end of the supporting tube component 70 in a penetrating way; the distal end of the steering assembly 50 is detachably connected to the push rod 25, and the proximal end extends out of the handle housing 40; the distal end of the stop assembly 80 is threadably engaged with the latch body 21 and the proximal end extends out of the handle shell 40.

Specifically, the support tube assembly 70 includes a sleeve 71, a connecting cylinder 73, and an outer tube 75 connected in this order from the distal end to the proximal end. The locking main body 21 is movably arranged in the sleeve 71 in a penetrating manner, two opposite sides of the sleeve 71 are provided with planes attached to the outer surfaces of the two first side walls 14 of the locking main body 21, and the planes of the first side walls 14 are attached to the planes in the sleeve 71, so that the locking main body 21 is prevented from rotating in the process that the push rod 25 drives the wire locking piece 23 to move in the locking main body 21. The sleeve 71 has an inner cavity 711 extending axially through its distal and proximal faces, the latch body 21 being disposed in the inner cavity 711 of the sleeve 71 and being only axially slidable in the inner cavity 711. A thread outlet notch 713 is formed in the proximal end of the outer peripheral wall of the sleeve 71 corresponding to the threading groove 211, and the medical thread 300 in the threading groove 211 extends out of the supporting tube assembly 70 from the thread outlet notch 713. The distal end surface of the connecting cylinder 73 is fixedly attached to the proximal end surface of the sleeve 71, the connecting cylinder 73 is provided with a first through groove 731 and a second through groove 733 at intervals along the axial direction, the first through groove 731 is located in the middle of the connecting cylinder 73 and aligned with the push rod 25, and the second through groove 733 is aligned with the limit screw hole 2133 of the lock catch body 21. The proximal end of the connector barrel 73 is fixedly attached to the distal end of the outer tube 75. In this embodiment, the outer tube 75 is a flexible tube that has a supporting effect and can be bent to facilitate insertion into a lumen of a human body.

The steering assembly 50 includes a first inner core 51 and a connecting rod 52 connected to a distal end of the first inner core 51. Specifically, the first inner core 51 is movably inserted into the outer tube 75, and in order to meet the requirement of human intervention, in this embodiment, the first inner core 51 is flexible and bendable; the distal end of the connecting rod 52 is provided with a second joint 521, the second joint 521 is detachably connected with the first joint 28 of the push rod 25, and further, the first joint 28 and the second joint 521 are respectively provided with a concave-convex structure with a complementary shape, such as a Z shape, an S shape, a tooth shape or a wave shape. When the first joint 28 is connected with the second joint 521 and is inserted into the first through groove 731 of the connecting cylinder 73, the connection relationship between the two is maintained; when the first joint 28 and the second joint 521 lose the envelope of the first through groove 731 on the periphery, such as when the distal end of the sleeve 71 is exposed, the second joint 521 and the first joint 28 can be disengaged to release the connection therebetween.

As shown in fig. 14, the operating assembly 50 further includes a first operating button 54 exposed from the proximal end of the handle housing 40 and a first barrel 55 detachably connected to the first operating button 54, wherein the first operating button 54 is disposed at the proximal end of the first barrel 55. The proximal end of the first inner core 51 is movably inserted through the outer tube 75 and the outer tube fixing member 44 and then fixedly connected to the first manipulation knob 54. When the first barrel part 55 is locked with the first operating button 54, the first barrel part 55 can rotate with the first operating button 54 and move axially together with the first operating button 54; when the first barrel member 55 is unlocked from the first operating button 54, the first operating member 55 is axially movable relative to the first barrel member 55. Specifically, the first operation button 54 includes a hollow housing 541, a connection column 543 axially extending inside the housing 541, and an end cap 545 disposed at a proximal end of the housing 541 and fixedly connected to the connection column 543. An annular slide guide groove 546 is disposed between the connecting column 543 and the housing 541, and the proximal end of the first barrel 55 is slidably inserted into the slide guide groove 546 along the axial direction. The distal end of the first barrel 55 is provided with a guide rod 551 in an axially protruding manner, the middle of the proximal end surface of the first barrel 55 is provided with a slide guiding hole 553 in an axially protruding manner, and the connecting column 543 is slidably inserted into the slide guiding hole 553. The proximal end of the first inner core 51 extends axially through the first barrel member 55 and is fixedly attached to the end cap 545. Guide rod 551 is movably embedded in the notches respectively arranged on first baffle 46 and second baffle 47, first retaining ring 555 protruding along the circumferential direction is arranged on guide rod 551, first retaining ring 555 is positioned between first baffle 46 and second baffle 47, so that first barrel part 55 can rotate relative to first baffle 46 and second baffle 47 and can axially move between first baffle 46 and second baffle 47, i.e. first retaining ring 555 can be stopped between first baffle 46 and second baffle 47. The housing 541 has a screw hole 547 formed along a radial direction thereof to communicate with the guide groove 546, and the first operating button 54 further includes a fastening screw 548 screwed into the screw hole 547, such that when the fastening screw 548 is tightened, the first barrel member 55 and the first operating button 54 are fixed together to be synchronously operated, and conversely, when the fastening screw 548 is loosened, the first barrel member 55 and the first operating button 54 are respectively operated. Preferably, the first barrel 55 is further provided with a displacement mark on its outer peripheral surface for displaying the amount of movement of the first manipulation knob 54 in the axial direction relative to the first barrel 55.

As shown in fig. 12, 13 and 15, the distal end of the limiting member 80 is detachably connected to the locking main body 21, the limiting member 80 is engaged with the limiting screw hole 2133 formed on the locking main body 21 to prevent the locking main body 21 from moving axially during the process of the push rod 25 driving the wire locking member 23 to move in the locking main body 21, and the limiting member 80 is separated from the locking main body 21 before the manipulating member 50 is separated from the proximal end of the push rod 25 so as not to hinder the medical lock 20 from being pushed out of the sleeve 71. Specifically, the limiting assembly 80 includes a second inner core 81 and a limiting screw 83 connected to a distal end of the second inner core 81, and the second inner core 81 is movably inserted into the outer tube 75. In order to adapt to the requirement of human body intervention, in this embodiment, the second inner core 81 is flexible and bendable. The limit screw 83 is movably inserted into the second through groove 733 of the connecting cylinder 73, and the limit screw 83 can be screwed with the limit screw 2133 of the locking main body 21. When the limit screw 83 is screwed in the limit screw hole 2133, the limit screw 83 can prevent the lock catch main body 21 from moving in the axial direction; after the limit screw 83 is released from the limit screw hole 2133, the latch body 21 can be moved in the axial direction by the push rod 25.

The stop assembly 80 further includes a second knob 84 exposed out of the proximal end of the handle housing 40 and a second barrel 85 fixedly connected to the second knob 84, the second knob 84 being located at the proximal end of the second barrel 85. The proximal end of the second inner core 81 is movably inserted through the outer tube 75 and the outer tube fixing member 44 and then fixedly connected to the second barrel 85 or the second operating button 84. The second cylinder 85 is movably inserted into the notches of the third baffle 48 and the fourth baffle 49, the second cylinder 85 is provided with a second retaining ring 86 protruding along the circumferential direction, and the second retaining ring 86 is located between the third baffle 48 and the fourth baffle 49. Second cartridge 85 is rotatable relative to third baffle 48 and fourth baffle 49 and is axially movable between third baffle 48 and fourth baffle 49, i.e., second stop 86 can be stopped between third baffle 48 and fourth baffle 49.

Referring to fig. 17 to 26, a procedure of using the medical locking device 100 according to the first embodiment of the present invention is described below by taking a valve repair of a tricuspid valve of a heart as an example.

The tricuspid valve is a one-way "valve" between the Right Atrium (RA) and the Right Ventricle (RV), which ensures blood flow from the right atrium to the right ventricle. A normal healthy tricuspid valve has a plurality of chordae tendineae. The valve leaves of the tricuspid valve are divided into an anterior leaf, a posterior leaf and a septal lobe, when the right ventricle is in a diastole state, the three are in an open state, and blood flows from the right atrium to the right ventricle; when the right ventricle is in a contraction state, the chordae tendineae are stretched to ensure that the valve leaflets are not flushed to the atrium side by blood flow, and the valve leaflets close well, so that blood is ensured to flow from the right ventricle to the pulmonary artery through the Pulmonary Valve (PV). If the tricuspid valve is diseased, when the right ventricle is in a contracted state, each valve leaflet is not closed completely, and the impulse of blood flow further causes the valve leaflets to fall into the right atrium, so that the blood flows back.

As shown in fig. 17, before using the medical locking device 100, a plurality of medical wires (which may be referred to as sutures) 300 with elastic spacers 310 are implanted into the anterior leaflet, the posterior leaflet, and the septal leaflet of the tricuspid valve, respectively, so that the point contact between the sutures 300 and the leaflets is converted into the surface contact between the elastic spacers 310 and the leaflets, which can effectively reduce the risk of tearing of the leaflets; the free end of the suture 300 extends out of the body.

The first step is as follows: as shown in fig. 18 and 19, a plurality of sutures 300 are threaded through the threading slots 211 from the threading holes 295 and out of the threading notches 713 outside the patient's body. At this time, the pressing roller 230 is close to the proximal end of the locker body 21; the first joint 28 and the second joint 521 are inserted into the first through groove 731 of the connecting cylinder 73; the limit screw 83 is in threaded connection with the limit screw hole 2133; the fastening screw 548 is tightened, and the first barrel member 55 is fixed to the first operating knob 54; the first retainer ring 555 is attached to the first baffle 46; the second retainer 86 is attached to the third baffle 48.

The second step is that: as shown in fig. 20, and with reference to fig. 21 and 22, with the guidance of the suture 300, the distal end of the support tube assembly 70 is advanced into the right atrium of the heart via an interventional pathway (e.g., femoral vein, inferior vena cava), moved closer to the leaflets of the tricuspid valve, simultaneously, the tightness of the suture 300 on each valve leaflet is adjusted, simultaneously the state of the tricuspid valve with the lightest regurgitation is determined by the ultrasound, when the state is reached, the first operating button 54 is rotated to drive the first core 51, the connecting rod 52 and the push rod 25 to rotate, so that the radial protrusion 253 at the distal end of the push rod 25 pushes against the press roller 230, the roller 232 moves along the guide groove 2140 toward the bottom surface of the retaining plate 291 and the threading groove 211, the gap between the outer circumferential surface of the pressing roller 230 and the bottom surface of the threading groove 211 is gradually reduced until the suture 300 is clamped between the outer circumferential surface of the pressing roller 230 and the bottom surface of the threading groove 211, and self-locking is formed between the transmission thread 255 on the push rod 25 and the locking screw hole 2131 of the lock catch main body 21; at this point, the first retainer 555 of the first barrel member 55 moves axially from the first stop 46 to abut the second stop 47, indicating that the medical fastener 20 has locked the suture 300. During this step, the limit screw 83 is screwed into the limit screw hole 2133 to prevent the lock body 21 from moving axially and distally.

The third step: referring to fig. 21 and 22, the second operating button 84 is rotated to rotate the second core 81, and the second core 81 drives the limit screw 83 to rotate relative to the latch body 21 until the limit screw 83 is disengaged from the limit screw hole 2133. At this time, the second shutter 86 moves from the third shutter 48 to abut against the fourth shutter 49.

The fourth step: as shown in fig. 23 and 24, the fastening screw 548 is unscrewed to release the relative locking between the first operating button 54 and the first barrel 55, the first operating button 54 is pushed to the distal end to drive the first inner core 51 to move to the distal end along the axial direction, the first inner core 51 pushes the push rod 25 and the entire medical lock 20 to expose out of the sleeve 71, the outer envelopes of the first joint 28 and the second joint 521 disappear, and the connection between the first joint 28 and the second joint 521 is released.

Thereafter, the knot device 100 is withdrawn and the cutting device is used to cut the suture 300 out of the medical lock 20. As shown in fig. 25 and 26, the locking device 20 and the locked suture 300 are left in the heart, and the leaflets of the tricuspid valve are pulled toward each other by the plurality of sutures 300, completing the edge-to-edge repair.

It is understood that the above only describes the use of the medical lock and medical locking device with the edge-to-edge repair of the tricuspid valve as an example. The medical latch and the medical locking device can also be used for locking and fixing the medical thread in other operation processes such as tricuspid chordae repair (the medical thread is used as an artificial chordae, one end of the medical thread is sewed on the valve leaflet, the other end of the medical thread is arranged on an anchor which is anchored on the ventricular wall or papillary muscle in a penetrating way and is locked by the medical latch), mitral valve edge opposite edge repair, mitral chordae repair, annuloplasty (a plurality of anchors are anchored into annulus tissue, the medical thread is connected with the near end of each anchor in series, and the medical latch is used for locking after the medical thread is tightened to reduce the area of the orifice of the valve), simple incision or broken suture and the like.

Referring to fig. 27 to 32, a second embodiment of the medical lock 20a of the present invention is similar to the first embodiment, but the structure of the position locking structure 27a of the medical lock 20a in the second embodiment is slightly different from the structure of the position locking structure 27 in the first embodiment. Referring to fig. 33 to 38, the manipulating member 50a of the second embodiment of the medical knotting apparatus has a slightly different structure from the manipulating member 50 of the first embodiment.

Specifically, as shown in fig. 27 to 32, in the second embodiment, the position locking structure 27a includes a through hole 2135 axially penetrating through the latch main body 21a for the push rod 25a to move through, a radial protrusion 253 disposed on the distal end of the push rod 25a, and a compression elastic member 275 sleeved on the push rod 25a, and two ends of the compression elastic member 275 abut against the radial protrusion 253 and a portion of the latch main body 21a located on the periphery of the through hole 2135, respectively. A radial projection 253 surrounds the distal end of the rod 251 of the pushrod 25a, the radial projection 253 having an outer diameter greater than the diameter of the rod 251. The through hole 2135 axially penetrates through the proximal end wall 213 of the latch body 21a and communicates with the accommodating space 210, the diameter of the through hole 2135 is larger than or equal to the diameter of the rod 251 but smaller than the diameter of the radial protrusion 253, so that the rod 251 can be movably inserted into the through hole 2135, and the radial protrusion 253 can be stopped by the through hole 2135 to prevent the thrust rod 25a from being disengaged from the latch body 21a from the through hole 2135. In this embodiment, the compression elastic member 275 preferably compresses a spring. When the proximal end of the push rod 25a is not pulled by external force, the compression spring 275 automatically springs open, the radial protrusion 253 at the distal end of the self-driven push rod 25a pushes against the pressing roller 230 to drive the thread locking piece 23 to move towards the baffle 291 and the bottom surface of the threading groove 211 along the guide groove 2140, and the gap between the outer circumferential surface of the pressing roller 230 and the bottom surface of the threading groove 211 is gradually reduced until the medical thread 300 is clamped between the outer circumferential surface of the pressing roller 230 and the bottom surface of the threading groove 211; thereafter, since the radial protrusion 253 at the distal end of the push rod 25a is always pressed by the compression spring toward the distal end, the relative position between the locking main body 21a and the locking wire 23 can be prevented from changing, and the medical wire 300 can be prevented from being released from between the locking wire 23 and the locking main body 21 a.

As shown in fig. 33, 35 and 37, the distance between the first baffle 46 and the second baffle 47 at the proximal end and the distal end of the first retainer 555 of the manipulating assembly 50a is smaller than the distance between the first baffle 46 and the second baffle 47 in the first embodiment. Specifically, the distance between the first baffle 46 and the second baffle 47 in the second embodiment is equal to or slightly larger than the axial thickness of the first retaining ring 555, and the first baffle 46 and the second baffle 47 are used for axially positioning the first retaining ring 555 to prevent the first barrel member 55 from being carried along to move axially when the compression spring 275 is sprung open. The first cylindrical member 55 is provided with displacement marks 557 on the outer peripheral surface thereof, and the displacement marks 557 include numerals "0", "1", and "2" in the order from the proximal end to the distal end.

As shown in fig. 33 and 34, when the medical locking device of the second embodiment is in the initial state, the numbers "0", "1" and "2" on the displacement indicator 557 are exposed outside the first operating button 54. In the initial state, the fastening screw 548 is tightened, the first barrel member 55 and the first operating button 54 are fixed together, the compression spring 275 is in a compressed state, and the wire locking member 23 is located at the proximal end of the guide groove 2140.

As shown in fig. 35 and 36, when the medical lock catch in the second embodiment is in the wire locking state, the fastening screw 548 is unscrewed, the compression elastic member 275 automatically pops open, the first operating button 54 is driven to move axially and distally, the number "0" on the displacement mark 557 is covered by the first operating button 54, the numbers "1" and "2" are exposed outside the first operating button 54, the compression elastic member 275 pushes the pressing roller 230 to lock the medical wire 300 from the driving rod 25, and the compression elastic member 275 continuously keeps elastically pushing against the pressing roller 230.

As shown in fig. 37 and 38, the first operating button 54 is continuously pushed to the far end until the number "1" on the displacement mark 557 is covered by the first operating button 54, and the number "2" is exposed, the first operating button 54 drives the first inner core 51 to move to the far end along the axial direction, the first inner core 51 pushes the push rod 25a and the whole medical lock 20a to expose out of the sleeve 71, the outer envelopes of the first joint 28 and the second joint 521 disappear, and the connection between the first joint 28 and the second joint 521 can be released.

In other embodiments, the position between the first operating button 54 and the first barrel 55 can be relatively limited or not limited by the cooperation between the positioning rod and the positioning hole; specifically, the outer peripheral surface of the first barrel 55 is provided with a first positioning hole along the radial direction, the outer peripheral surface of the first operating button 54 is provided with a second positioning hole corresponding to the first positioning hole, and when the positioning rod is inserted into the first positioning hole and the second positioning hole, the position between the first operating button 54 and the first barrel 55 is relatively limited; when the positioning rod inserted into the first positioning hole and the second positioning hole is pulled out, the first manipulation button 54 can move in the axial direction relative to the first barrel 55.

It will be appreciated that in other embodiments, a tensile resilient member such as a tension spring may be used instead of the compression resilient member 275 of the second embodiment described above. Referring to fig. 29 to fig. 32, when the elastic member is used, the elastic member is not disposed in the receiving space 210 of the latch body 21a, but disposed outside the receiving space 210, one end of the elastic member still abuts against a portion of the latch body 21a located at the periphery of the through hole 2135, and the other end extends to the proximal end and is connected to the proximal end of the push rod 25a, for example, by welding. When the push rod 25a is acted upon by an external force toward the proximal end, the tensile elastic member is stretched; when the external force applied to the push rod 25a is removed, the stretching elastic member automatically contracts, the distal end of the self-driven push rod 25a pushes the pressing roller 230 to drive the thread locking member 23 to move towards the baffle 291 and the bottom surface of the thread passing groove 211 along the guide groove 2140, and the gap between the outer circumferential surface of the pressing roller 230 and the bottom surface of the thread passing groove 211 is gradually reduced until the medical thread 300 is clamped between the outer circumferential surface of the pressing roller 230 and the bottom surface of the thread passing groove 211; thereafter, since the proximal end of the push rod 25a is always pulled by the stretching elastic member toward the distal end, the relative position between the locking main body 21a and the wire locking member 23 can be prevented from changing, and the medical wire 300 can be prevented from being released from between the wire locking member 23 and the locking main body 21 a. That is, in this embodiment, in a state where the medical wire is clamped, the position locking structure pulls the push rod 25a to maintain the relative position of the wire locking member 23 and the locker body 21 a.

The above is an implementation manner of the embodiments of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principles of the embodiments of the present invention, and these improvements and decorations are also considered as the protection scope of the present invention.

Claims (17)

1. A medical hasp for locking medical line, its characterized in that includes:

a lock catch main body;

the wire locking piece is movably arranged in the lock catch main body;

the far end of the push rod abuts against the wire locking piece so as to drive the wire locking piece to move in the lock catch main body, and the medical wire is clamped between the lock catch main body and the wire locking piece;

and the position locking structure is used for propping or pulling the push rod under the state that the medical wire is clamped, so as to keep the relative position of the wire locking piece and the lock catch main body.

2. The medical lock catch according to claim 1, wherein an accommodating space and a threading groove communicating with the accommodating space are formed in the lock catch main body, the threading member comprises a pressing roller movably accommodated in the accommodating space, and the medical thread is arranged between the threading groove and the pressing roller in a penetrating manner; and in the process that the push rod moves from the near end of the lock catch main body to the far end of the lock catch main body, the press roller is driven to move in the accommodating space, so that the gap between the press roller and the bottom surface of the threading groove is gradually reduced.

3. The medical lock catch as claimed in claim 2, wherein a guide rail or a guide groove is provided on a side wall of the lock catch body corresponding to the accommodating space, the guide rail or the guide groove extends from a proximal end of the accommodating space to a distal end of the accommodating space and gradually approaches to a bottom surface of the threading groove; the wire locking piece further comprises rolling shafts connected to two sides of the pressing roller, and the rolling shafts are matched with the guide rails or the guide grooves.

4. The medical latch of claim 3 wherein the diameter of the compression roller, the diameter of the medical wire, the height of the distal end of the guide channel or railThe maximum height value of the bottom surface of the threading groove from the far end of the guide groove or the guide rail meets the following requirements: h is not less than 0₁-H₂/2-D₁/2≤D₂Wherein H is₁Represents the maximum height value H of the bottom surface of the threading groove from the far end of the guide groove or the guide rail₂Representing a height value, D, of the distal end of the channel₁Representing the diameter value of the press roll, D₂Representing a diameter value of the medical wire.

5. The medical latch of claim 1 wherein the proximal end of the pushrod is coupled to a first connector, the first connector being exposed outside of the latch body.

6. The medical lock catch as claimed in claim 1, wherein the lock catch body is provided with a limiting structure, and the limiting structure is used for preventing the lock catch body from moving during the process that the push rod drives the wire locking member to move in the lock catch body.

7. The medical fastener of any one of claims 1-6, wherein said position locking structure comprises a threaded hole axially through said fastener body, and a driving thread provided on at least a portion of an outer surface of said push rod, said driving thread being adapted to said threaded hole.

8. The medical latch of claim 7 wherein the position locking structure further comprises a stop connected to the distal end of the latch body, the stop defining an extreme position of the distal end of the wire locking member.

9. The medical lock catch as claimed in any one of claims 1 to 6, wherein the position locking structure comprises a through hole axially penetrating through the lock catch body for the push rod to movably pass through, and an elastic member sleeved on the push rod, wherein one end of the elastic member abuts against the periphery of the through hole, and the other end abuts against the distal end of the push rod or is connected with the proximal end of the push rod.

10. The medical latch of claim 9 wherein the position locking structure further comprises a stop connected to the distal end of the latch body, the stop defining an extreme position of the distal end of the wire locking member.

11. A medical locking device, comprising the medical lock of any one of claims 1 to 10 and a manipulating member, wherein the manipulating member is detachably connected to the proximal end of the pushing rod, the manipulating member is used for controlling the action of the pushing rod, and the manipulating member is separated from the proximal end of the pushing rod after the relative position of the pushing rod and the lock body is kept unchanged.

12. The medical locking device of claim 11, further comprising a limiting component detachably connected to the locking body, wherein the limiting component cooperates with a limiting structure disposed on the locking body to prevent the locking body from moving axially during the process of the push rod driving the wire locking member to move in the locking body, and the limiting component is separated from the locking body before the manipulating component is separated from the proximal end of the push rod.

13. The medical locking device according to claim 12, further comprising a support tube assembly, wherein the locking device body is movably disposed in the distal end of the support tube assembly, and the control assembly and the limiting assembly are movably disposed in the support tube assembly and extend out of the proximal end of the support tube assembly.

14. The medical knot device of claim 13, wherein the support tube assembly comprises a sleeve, a connecting cylinder and an outer tube connected in sequence from a distal end to a proximal end; the lock catch main body is movably arranged in the sleeve in a penetrating mode, and the sleeve is matched with a limiting structure arranged on the lock catch main body so as to prevent the lock catch main body from rotating in the process that the push rod drives the wire locking piece to move in the lock catch main body; a lumen is disposed within the connector barrel surrounding a distal end of the steering assembly.

15. The medical knot device of claim 14, wherein the manipulation assembly comprises a first inner core and a connecting rod connected to a distal end of the first inner core, a distal end of the connecting rod being detachably connected to a proximal end of the push rod; the limiting assembly comprises a second inner core and a limiting screw connected to the far end of the second inner core, the limiting structure arranged on the lock catch main body comprises a limiting screw hole arranged along the axial direction, and the limiting screw is in threaded connection with the limiting screw hole.

16. The medical knot device of claim 15, wherein the manipulation assembly further comprises a first manipulation knob fixedly connected to the proximal end of the first inner core, and a first barrel member sleeved outside the first inner core and detachably connected to the first manipulation knob; the limiting assembly further comprises a second control button fixedly connected with the near end of the second inner core and a second barrel part sleeved outside the second inner core and fixedly connected with the second control button.

17. The medical knot device of claim 16, further comprising a handle shell, wherein the proximal end of the outer tube is fixedly attached within the handle shell, and wherein the first and second inner cores extend within the handle shell;

the first barrel part is partially arranged in the handle shell, a first retaining ring is arranged on the first barrel part, a first baffle plate and a second baffle plate are arranged in the handle shell at intervals, and the first retaining ring is positioned between the first baffle plate and the second baffle plate;

the part of the second cylinder piece is arranged in the handle shell, a second retainer ring is arranged on the second cylinder piece, a third baffle and a fourth baffle are arranged in the handle shell at intervals, and the second retainer ring is positioned between the third baffle and the fourth baffle.

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