CN116035637A - push knot cutter - Google Patents

Abstract

The application relates to a knot pushing and trimming device, comprising: the end part, the first pipe body, the second pipe body and the cutter pipe. The end part is provided with an inner cavity, a lead channel is formed in the end part along the axial direction of the end part, and the lead channel is formed in the inner cavity; the first pipe body is rotationally sleeved in the inner cavity, and a first notch is formed in the pipe wall of the first pipe body; the second pipe body is rotatably sleeved outside the first pipe body and connected with the end part; when the first notch rotates to be in a superposition state with the lead channel, the suture thread can be penetrated out of the lead channel in a radial falling manner through the first notch; when the first notch rotates to be in a dislocation state with the lead channel, at least part of the pipe wall of the first pipe body is used for blocking the suture line from penetrating out of the lead channel along the radial direction; the knife tube is rotatably sleeved between the first tube body and the second tube body, and is configured to move in the lead channel and to be matched with the cavity wall of the inner cavity to cut off the suture line. Can be suitable for the suture cutting operation of long-distance in-vivo suture lines.

Description

push knot cutter

technical field

The present application relates to the technical field of medical operations, in particular to a knot pusher and thread cutter.

Background technique

At present, the thread cutter is mainly used as a hand-held operating system for various types of suturing and thread trimming in the body, and is a relatively advanced structural device. The currently used thread cutters cannot perform long-distance thread cutting operations inside the human body, for example: they cannot directly act on the right/left atrium area of the human body. In addition, the currently used thread cutter often has the phenomenon of intravascular bleeding during application, or the problem that the suture thread often falls out of the cutting area when the instrument enters the body.

Based on this, there is an urgent need for a wire cutter with a new structure that can solve the above problems.

Contents of the invention

In view of the above problems, the present application provides a knot pusher and thread cutter, which aims to prevent sutures from falling out of the cutting area when the instrument enters the body.

The present application provides a push knot thread cutter, comprising: an end part, a first pipe body, a second pipe body and a knife pipe. Wherein, the end portion has an inner cavity, and the end portion is provided with a lead wire channel along its axial direction, and the lead wire channel communicates with the inner cavity; the first tube body is rotatably sleeved in the inner cavity, and the The pipe wall of the first pipe body is provided with a first notch; the second pipe body is rotatably sleeved outside the first pipe body, and the second pipe body is connected to the end; when the first notch When it is rotated to coincide with the guide wire channel, the suture thread can detachably pass through the guide wire channel in the radial direction through the first notch; when the first notch is rotated to be in a misaligned state with the guide wire channel , at least part of the tube wall of the first tube body is used to prevent the suture thread from passing through the guide wire channel in the radial direction; the knife tube is rotatably sleeved between the first tube body and the second tube body Between, the knife tube is configured to be able to move in the inner cavity and cooperate with the cavity wall of the inner cavity to cut off the suture.

In the technical solution of the embodiment of the present application, the second pipe body is relatively fixedly connected to the end, the first pipe body can rotate in the second pipe body along its own axis, and the knife tube can rotate between the first pipe body and the second pipe body along its own axis. Rotate between tubes. Before pushing the knot and trimming the thread, the first notch of the first tube body is in a state of coincidence with the guide wire channel at this time, and the suture thread that is connected with the knot in the body during the operation and taken out of the body is inserted into the guide wire channel, and then the first tube body is rotated, Make the first notch and the guide wire passage be in a misaligned state, so as to ensure that the suture thread will not fall off through the guide wire passage. Then, the end of the suture thread, the first tube body and the second tube body are penetrated into the human body through blood vessels until they enter the right/left atrium area and other positions with knots for thread cutting operation to complete long-distance cutting. Wire.

In some embodiments, the end portion is configured as a structure of revolution, and the distal end of the end portion is configured as an area structure.

In some embodiments, the knot pusher and thread cutter also includes a handle and a housing, the housing is mounted on the proximal end of the second tube body, the handle is located at the proximal end of the housing, and the second tube A first groove is provided on the body for connecting with the handle, and a projection is provided on the housing, and the projection is slidably fitted with the first groove; the first groove includes a An extended first path segment and a circumferentially extended second path segment, when the protrusion slides to the second path segment, the second pipe body rotates and is positioned to a preset position.

In some embodiments, an elastic abutment member is provided between the handle and the first pipe body; the elastic abutment member includes: a connection part, one end of the connection part is configured with a second groove, the The other end of the connecting part is configured with a protruding structure, the connecting part is sleeved on the outside of the first pipe body through the second groove, and the protruding structure of the connecting part is covered with a spring, so One end of the spring abuts against the inner side wall of the handle, and the other end of the spring abuts against the side wall where the protruding structure is connected to the connecting portion.

In some embodiments, the knife tube includes a third tubular body near the proximal end and a blade formed on the distal end of the third tubular body; a blade knob is arranged inside the housing, and the blade knob is fixedly sleeved on the outer wall of the third tube body; a connecting structure is also provided in the outer shell, and the connecting structure is sleeved on the outer wall of the third tube, and the proximal end of the blade knob is connected to the distal end of the connecting structure Threaded connection, so that when the blade knob moves relative to the connecting structure, it can drive the third pipe body to move synchronously.

In some embodiments, the connection structure has a clearance groove for the movement of the third pipe body; the inner sidewall of the clearance groove is used to prevent the third pipe body from continuing to retract inward, so The inner sidewall of the inner cavity at the end is used to prevent the blade from continuing to move outward, and the inner sidewall of the inner cavity cooperates with the blade to cut the suture thread.

In some embodiments, the push knot cutter further includes a locking knob, the locking knob is sleeved between the outer casing and the third pipe body in the radial direction, and the locking knob is arranged along the radial direction. The axial direction is located between the blade knob and the end, and the locking knob can lock or unlock the position between the knife tube and the first tube body.

In some embodiments, the housing is also provided with two connecting holes for connecting the hemostatic valve;

In the position area where the components in the housing communicate with each of the connecting holes, between the corresponding third pipe body and the first pipe body, and between the corresponding third pipe body and the first pipe body Between the two pipe bodies, a gap structure for filling with physiological saline is prefabricated.

In some embodiments, a second notch communicating with the lead wire channel is formed on the outer wall of the second tube body.

In some embodiments, the first notch communicates with the distal end of the first tubular body; the second notch communicates with the distal end of the second tubular body.

The above description is only an overview of the technical solution of the present application. In order to better understand the technical means of the present application, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present application more obvious and understandable , the following specifically cites the specific implementation manner of the present application.

Description of drawings

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 embodiment. The drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the application. Also, the same reference numerals are used to denote the same components throughout the drawings. In the attached picture:

Fig. 1 is a front structural schematic diagram 1 of a push knot thread cutter in an embodiment of the present application;

Fig. 2 is a schematic cross-sectional structure diagram along A-A in Fig. 1 in an embodiment of the present application;

Fig. 3 is a schematic diagram of the shaft side structure of the push knot thread cutter in an embodiment of the present application;

Fig. 4 is an enlarged structural schematic diagram of the end at B in Fig. 3 in an embodiment of the present application;

Fig. 5 is a schematic diagram of the fracture structure of the first pipe body in an embodiment of the present application;

Fig. 6 is a schematic diagram of the fracture structure of the second pipe body in an embodiment of the present application;

Fig. 7 is the second structural schematic diagram of the front view of the knot pusher and thread cutter in an embodiment of the present application.

The reference numerals in the specific embodiment are as follows:

2. Push knot thread cutter; 11. End; 12. First pipe body; 13. Second pipe body; 14. Knife pipe; 15. Handle; 16. Shell; 17. Connection hole; 18. Elastic abutment Component; 19, blade knob; 20, locking knob; 111, lead wire channel; 121, first notch; 131, second notch; 132, first groove; 1321, first path segment; 1322, second path segment ; 181, connecting portion; 182, spring.

Detailed ways

Embodiments of the technical solutions of the present application will be described in detail below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present application more clearly, and therefore are only examples, rather than limiting the protection scope of the present application.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of the application; the terms used herein are only for the purpose of describing specific embodiments, and are not intended to To limit this application; the terms "comprising" and "having" and any variations thereof in the specification and claims of this application and the description of the above drawings are intended to cover a non-exclusive inclusion.

In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects, and should not be understood as indicating or implying relative importance or implicitly indicating the number, specificity, or specificity of the indicated technical features. Sequence or primary-secondary relationship. In the description of the embodiments of the present application, "plurality" means two or more, unless otherwise specifically defined.

Reference herein to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The occurrences of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is understood explicitly and implicitly by those skilled in the art that the embodiments described herein can be combined with other embodiments.

In the description of the embodiment of the present application, the term "and/or" is only a kind of association relationship describing associated objects, which means that there may be three kinds of relationships, such as A and/or B, which may mean: A exists alone, and A exists at the same time and B, there are three cases of B alone. In addition, the character "/" in this article generally indicates that the contextual objects are an "or" relationship.

In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two), similarly, "multiple groups" refers to more than two groups (including two), and "multiple pieces" refers to More than two pieces (including two pieces).

In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical" "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", "Radial", "Circumferential", etc. indicate the orientation or positional relationship based on the drawings Orientation or positional relationship is only for the convenience of describing the embodiment of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as an implementation of the present application. Example limitations.

In the description of the embodiments of this application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection" and "fixation" should be interpreted in a broad sense, for example, it can be a fixed connection or a fixed connection. Disassembled connection, or integration; it can also be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the embodiments of the present application according to specific situations.

In the prior art, it is often necessary to cut the suture thread when performing internal suturing operations on the human body. However, various thread cutters currently used cannot perform long-distance thread cutting operations, for example: it is impossible to enter the suture thread through blood vessels. to the heart area. Moreover, the existing thread cutter often has the problem that the suture thread falls off after the instrument enters the blood vessel. Based on this, the present application aims to provide a method that can not only perform long-distance thread cutting but also prevent the suture from falling off after the instrument enters the blood vessel. The specific scheme is as follows:

Referring to Fig. 1-Fig. 7, it is a schematic diagram of the relevant structure of the thread cutter recommended in this application. The relevant structure of the knot pusher and thread cutter of the present application will be described below in conjunction with the accompanying drawings.

Referring to FIG. 1 and FIG. 2 , a knot pusher and thread cutter 10 is provided for this application, including: an end portion 11 , a first tube body 12 , a second tube body 13 and a knife tube 14 . Wherein, the end portion 11 has an inner cavity, and the end portion 11 is provided with a lead wire channel 111 along its axial direction, and the lead wire channel 111 is formed in the inner cavity; the first tube body 12 is rotatably sleeved in the inner cavity, further referring to FIG. 5 , the first tube The tube wall of the body 12 is provided with a first notch 121; the second tube body 13 is rotated and sleeved outside the first tube body 12, and the second tube body 13 is connected to the end 11; When it is in the overlapped state, the suture thread can detachably pass through the guide wire channel 111 in the radial direction through the first notch 121; It is used to prevent the suture thread from passing out of the guide wire channel 111 in the radial direction; the knife tube 14 is rotatably sleeved between the first tube body 12 and the second tube body 13, and the knife tube 14 is configured to be able to move in the guide wire channel 111, and can Cut the suture in cooperation with the lumen wall of the lumen.

Exemplarily, the end portion 11 , the first tube body 12 , the second tube body 13 and the cutter tube 14 are all of a rotary structure.

Exemplarily, the lengths of the first tube body 12 , the second tube body 13 and the knife tube 14 can be set according to actual application needs. The details are based on the application scenario.

Exemplarily, the present application does not limit the shape of the lead wire channel 111 and the first notch 121, as long as the suture thread can be penetrated, and the lead wire channel 111 can be closed after the first tube body 12 is rotated, so as to Just keep the sutures from coming off.

With the push knot wire cutter 10 of the present application, the second pipe body 13 is relatively fixedly connected to the end portion 11, the first pipe body 12 can rotate in the second pipe body 13 along its own axis, and the knife tube 14 can rotate along its own axis. Rotate between the first tube body 12 and the second tube body 13 . Before pushing the knot and trimming the thread, the first notch 121 of the first tube body 12 is in a state of coincidence with the lead wire channel 111 at this time, and the suture thread that is connected with the knot in the body and taken out of the body during the operation is inserted into the lead wire channel 111, and then the first notch 121 is rotated. A tube body 12, so that the first notch 121 and the guide wire channel 111 are in a misaligned state, so as to ensure that the suture will not fall off through the guide wire channel 111. Then, the end portion 11, the first tube body 12 and the second tube body 13 threaded with the suture thread are penetrated into the human body through the blood vessel, until they enter the right/left atrium area and other positions with knots to perform the thread cutting operation to complete Long distance thread cutting.

In an optional embodiment of the present application, with further reference to FIG. 4 , the end portion 11 is configured as a structure of revolution, and the distal end of the end portion 11 is configured as an area structure, that is, it can be understood that the distal end of the end portion 11 is used to connect with the wire The knots are in direct contact, and the side that is in direct contact with the wire knots is constructed as an area structure. Exemplarily, the planar structure can be understood as a shaped planar structure. When the knot pusher 10 of the present application reaches the position where the knot is located, push the external handle 15 so that the surface structure can directly push the knot, which can lock the knot to further ensure that the knot is knot stability.

Exemplarily, the present application does not limit the shape of the area structure on the surface of the end portion 11, as long as a continuous planar structure can be formed. Only under the pushing action of the continuous planar structure can the second locking of the wire knot be carried out.

In an optional embodiment of the present application, with further reference to FIG. 7 , the knot pusher and thread cutter 10 also includes a handle 15 and a housing 16, and the housing 16 is installed on the proximal end of the second tubular body 13, and the proximal end can be understood as the handle 15. One side, opposite to the proximal end is the distal end, and the distal end can be understood as the side close to the end portion 11 . The handle 15 is located at the proximal end of the shell 16, and the second tube body 13 is provided with a first groove 132 at a position connected to the handle 15, and a projection (not shown in the accompanying drawings) is arranged on the shell 16, and the projection is connected with the first groove 132. A groove 132 is slidingly fitted; the first groove 132 includes a first path segment 1321 extending axially and a second path segment 1322 extending circumferentially, when the protrusion slides to the second path segment 1322, the second tube The body 13 rotates and is positioned to a preset position.

Exemplarily, the first groove 132 of the present application may be an L-shaped structure, and the two sections of the L-shaped structure correspond to the first path section 1321 and the second path section 1322 respectively.

Exemplarily, both the handle 15 and the housing 16 are configured as a revolving body. The present application does not limit the shapes of the handle 15 and the housing 16 .

Applying the structure of the first groove 132 and the protrusion as above can make the handle 15 drive the first tube body 12 to rotate during the process of pressing and rotating, thereby achieving the effect of preventing the suture thread from coming out.

In an optional embodiment of the present application, further referring to FIG. 2 , an elastic abutment member 18 is provided between the handle 15 and the first pipe body 12, and the elastic abutment member 18 includes: a connecting portion 181, one end of the connecting portion 181 is configured with The second groove, the other end of the connecting part 181 is configured with a protruding structure, the connecting part 181 is sleeved outside the first pipe body 12 through the second groove, the protruding structure of the connecting part 181 is covered with a spring 182, and the spring 182 One end of the spring 182 abuts against the inner side wall of the handle 15 , and the other end of the spring 182 abuts against the side wall where the protruding structure is connected with the connecting portion 181 . The structure of the connecting part 181 and the spring 182 can be installed in a limited space in the handle 15, and the structure is simple, easy to use, and easy to disassemble. Furthermore, the use of the elastic abutment member 18 can realize stable relative displacement between the handle 15 and the first tube body 12, further ensuring the stability of the whole instrument.

Exemplarily, the present application does not limit the specific structure of the connecting portion 181 , as long as the stable sleeve and positioning of the spring 182 can be realized.

Exemplarily, the connection part 181 of the present application is sheathed on the outside of the first pipe body 12, which can be understood as a relatively fixed connection between the two. In order to prevent the first pipe body 12 from shaking or displacement in the radial direction during the rotation process.

In an optional embodiment of the present application, the knife tube 14 includes a third tubular body near the proximal end and a blade formed on the far end of the third tubular body; a blade knob 19 is arranged in the housing 16, and the blade knob 19 is fixedly sleeved. Located on the outer wall of the third tube, a connecting structure is also provided in the outer shell 16, the connecting structure is sleeved on the outer wall of the third tube, the proximal end of the blade knob 19 is screwed to the distal end of the connecting structure, so that the blade knob 19 is relatively connected When the structure moves, it can drive the third pipe body to move synchronously. With the structure of the knife tube 14 as above, the structural strength of the long distance knife tube 14 can be ensured.

Exemplarily, the third tube body in the knife tube 14 of the present application is configured as a solid structure.

Exemplarily, the blade knob 19 of the present application may be a knob made of medical device material.

In an optional embodiment of the present application, further referring to FIG. 2 , there is a gap groove for the movement of the third pipe body in the connecting structure; The inner side wall of the inner cavity of the part 11 is used to prevent the blade from continuing to move outwards, and the inner side wall of the inner cavity cooperates with the blade to cut the suture.

In an optional embodiment of the present application, with further reference to FIG. 3 and FIG. 7 , the knot pusher and thread cutter 10 further includes a locking knob 20 , which is sleeved between the casing 16 and the third pipe body in the radial direction. , the locking knob 20 is located between the blade knob 19 and the end 11 along the axial direction, and the locking knob 20 can lock or unlock the position between the knife tube 14 and the first tube body 12 . When the position of the blade needs to be adjusted, the locking knob 20 is loosened, and when the blade is adjusted to a desired position, the locking knob 20 can be tightened. The position adjustment of the blade can be facilitated, and it can also be ensured that the blade will not cut off the suture line by mistake when the instrument enters the human body.

Exemplarily, the locking knob 20 of the present application may be a knob made of medical device material.

In an optional embodiment of the present application, with further reference to FIG. 1 , the housing 16 is also provided with two connection holes 17 for connecting the hemostatic valve; Between the three tube bodies and the first tube body 12 , and between the corresponding third tube body and the second tube body 13 , gap structures for filling with physiological saline are prefabricated.

Exemplarily, the connection hole 17 communicates with the gap structure between the third pipe body and the first pipe body 12 , and the connection hole 17 communicates with the gap structure between the third pipe body and the second pipe body 13 .

In an optional embodiment of the present application, further referring to FIG. 6 , a second notch 131 communicating with the lead wire channel 111 is formed on the outer wall of the second tube body 13 . The setting of the second notch 131 is to ensure that the guide wire channel 111 is convenient for the insertion of sutures.

In an optional embodiment of the present application, further refer to FIG. 5 and FIG. 6 , wherein the first notch 121 communicates with the distal end of the first tube body 12 ; the second notch 131 communicates with the distal end of the second tube body 13 . Such a structural setting is to facilitate communication with the lead wire channel 111 , so that extracorporeal sutures can be smoothly inserted into the lead wire channel 111 .

Exemplarily, the first notch 121 and the second notch 131 of the present application may be of regular shape or irregular shape, and the present application does not limit the shape of the first notch 121 and the second notch 131 .

The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, should be considered as within the scope of this specification.

The above-mentioned embodiments only express several implementation modes of the present application, and the description thereof is relatively specific and detailed, but should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of protection of the patent application should be based on the appended claims.

Claims (10)

1. A knot clipper, comprising:

the end part is provided with an inner cavity, and is provided with a lead channel along the axial direction of the end part, and the lead channel is communicated with the inner cavity;

the first pipe body is rotationally sleeved in the inner cavity, and a first notch is formed in the pipe wall of the first pipe body;

the second pipe body is rotationally sleeved outside the first pipe body, and the second pipe body is connected with the end part;

when the first notch rotates to be in a superposition state with the lead channel, the suture thread can be penetrated out of the lead channel in a radial falling manner through the first notch;

when the first notch rotates to be in a dislocation state with the lead channel, at least part of the pipe wall of the first pipe body is used for blocking the suture line from penetrating out of the lead channel along the radial direction;

the knife tube is rotationally sleeved between the first tube body and the second tube body, and is configured to move in the inner cavity and be matched with the cavity wall of the inner cavity to cut off the suture line.

2. The knot clipper of claim 1, wherein the end is configured as a solid of revolution and the distal end of the end is configured as a face area structure.

3. The knot clipper of claim 1, further comprising a handle and a housing, the housing mounted to the proximal end of the second tube, the handle positioned at the proximal end of the housing, a first groove positioned on the second tube for connection to the handle, a tab positioned on the housing, the tab slidably engaging the first groove; the first groove comprises a first path section extending along the axial direction and a second path section extending along the circumferential direction, and when the convex block slides to the second path section, the second pipe body rotates and is positioned to a preset position.

4. A knot clipper according to claim 3, wherein an elastic abutment member is provided between the handle and the first tube body;

the elastic abutment member includes: the connecting portion, the one end of connecting portion is constructed with the second recess, the other end of connecting portion is constructed with protruding structure, connecting portion passes through the second recess cover is located the outside of first body, connecting portion protruding structure overcoat is equipped with the spring, the one end butt of spring in the inside wall of handle, the other end butt of spring in protruding structure with the lateral wall that connecting portion are connected.

5. The knot clipper of claim 3, wherein the blade tube comprises a third tube body proximate the proximal end and a blade formed at the distal end of the third tube body; a blade knob is arranged in the shell and fixedly sleeved on the outer wall of the third pipe body; still be provided with connection structure in the shell, connection structure cover is located third body outer wall, the proximal end of blade knob with connection structure's distal end threaded connection, so that the blade knob is relative when connection structure removes, can drive third body synchronous movement.

6. The knot clipper of claim 5, wherein the connection structure has a clearance groove therein for movement of the third tube; the inner side wall of the clearance groove is used for blocking the third pipe body from continuously retracting inwards, the inner side wall of the inner cavity of the end part is used for blocking the blade from continuously retracting outwards, and the inner side wall of the inner cavity is in friction with the blade in a matched mode so as to be used for shearing the suture line.

7. The knot clipper of claim 5, further comprising a locking knob radially nested between the housing and the third tube, the locking knob axially positioned between the blade knob and the end, the locking knob capable of locking or unlocking the position between the blade tube and the first tube.

8. The knot clipper of claim 1, wherein the housing is further provided with two connection holes for connecting a hemostatic valve;

in the position area where the components in the shell are communicated with the connecting holes, a gap structure for filling physiological saline is prefabricated between the corresponding third pipe body and the first pipe body and between the corresponding third pipe body and the second pipe body.

9. The knot clipper of claim 1, wherein the outer wall of the second tube body is provided with a second notch in communication with the lead channel.

10. The knot clipper of claim 9, wherein the first notch is through the distal end of the first tube; the second notch is communicated with the distal end of the second tube body.

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