Push knot threader

Abstract

This application relates to a suture cutter, comprising: an end portion, a first tube body, a second tube body, and a blade tube. The end portion has an inner cavity, and a suture guide channel is formed within the inner cavity along its axial direction. The first tube body is rotatably fitted within the inner cavity, and a first notch is formed in the tube wall of the first tube body. The second tube body is rotatably fitted outside the first tube body and connected to the end portion. When the first notch rotates to coincide with the suture guide channel, the suture can be radially detached and exits the suture guide channel through the first notch. When the first notch rotates to a misaligned state with the suture guide channel, at least a portion of the tube wall of the first tube body serves to prevent the suture from radially exiting the suture guide channel. The blade tube is rotatably fitted between the first and second tube bodies, and is configured to move within the suture guide channel and cooperate with the cavity wall to cut the suture. This device is suitable for long-distance suture cutting operations within the body.

Description

Technical Field

[0001] This application relates to the field of medical surgical technology, and in particular to a suture cutter. Background Technology

[0002] Currently, suture cutters are primarily used as a handheld operating system for cutting various sutures inside the body, and are a relatively advanced structural device. However, existing suture cutters cannot perform long-distance suture cutting inside the body; for example, they cannot directly target the right / left atrium. Furthermore, existing suture cutters frequently cause intravascular bleeding during application, or the suture may fall out of the cutting area when the instrument is inserted into the body.

[0003] Therefore, there is an urgent need for a new type of wire cutter that can solve the above problems. Summary of the Invention

[0004] In view of the above problems, this application provides a suture cutter designed to prevent the suture from falling out of the cutting area when the instrument is inserted into the body.

[0005] This application provides a suture cutter, comprising: an end, a first tube, a second tube, and a blade. The end has an inner cavity and a suture guide channel along its axial direction, the suture guide channel communicating with the inner cavity. The first tube is rotatably fitted within the inner cavity, and its wall has a first notch. The second tube is rotatably fitted outside the first tube and connected to the end. When the first notch rotates to coincide with the suture guide channel, the suture can be radially and detachably passed through the suture guide channel via the first notch. When the first notch rotates to be misaligned with the suture guide channel, at least a portion of the wall of the first tube prevents the suture from radially passing through the suture guide channel. The blade is rotatably fitted between the first and second tubes, and is configured to move within the inner cavity and cooperate with the cavity wall to cut the suture.

[0006] In the technical solution of this application embodiment, the second tube body is fixedly connected to the end, the first tube body can rotate within the second tube body along its own axis, and the blade tube can rotate between the first and second tube bodies along its own axis. Before the suture is pushed and cut, the first notch of the first tube body is aligned with the suture channel. The suture, which is connected to the knot inside the body during surgery, is inserted into the suture channel. Then, the first tube body is rotated so that the first notch and the suture channel are misaligned to ensure that the suture will not fall off through the suture channel. Then, the end with the suture, the first tube body, and the second tube body are inserted into the human body through blood vessels until they reach the right / left atrium region or other locations with knots for suture cutting, thus completing the long-distance suture cutting.

[0007] In some embodiments, the end portion is configured as a rotating body structure, and the distal end of the end portion is configured as a surface region structure.

[0008] In some embodiments, the push-knot wire cutter further includes a handle and a housing. The housing is mounted on the proximal end of the second tube body, and the handle is located on the proximal end of the housing. A first groove is provided on the second tube body at a position for connecting with the handle, and a protrusion is provided on the housing body. The protrusion slides into the first groove. The first groove includes a first path segment extending axially and a second path segment extending circumferentially. When the protrusion slides to the second path segment, the second tube body rotates and is positioned at a preset position.

[0009] In some embodiments, an elastic abutment member is provided between the handle and the first tube body; the elastic abutment member includes: a connecting portion, one end of the connecting portion having a second groove, the other end of the connecting portion having a protrusion structure, the connecting portion being sleeved on the outside of the first tube body through the second groove, the protrusion structure of the connecting portion being sleeved with a spring, one end of the spring abutting against the inner sidewall of the handle, and the other end of the spring abutting against the sidewall where the protrusion structure connects to the connecting portion.

[0010] In some embodiments, the blade tube includes a third tube body near its proximal end and a blade formed on the distal end of the third tube body; a blade knob is provided inside the housing and is fixedly sleeved on the outer wall of the third tube body; a connecting structure is also provided inside the housing and is sleeved on the outer wall of the third tube body, and the proximal end of the blade knob is threadedly connected to the distal end of the connecting structure so that when the blade knob moves relative to the connecting structure, it can drive the third tube body to move synchronously.

[0011] In some embodiments, the connecting structure has a gap groove for the movement of the third tube; the inner wall of the gap groove is used to prevent the third tube from continuously retracting inward, and the inner wall of the inner cavity at the end is used to prevent the blade from continuously extending outward; the inner wall of the inner cavity rubs against the blade to cut the suture.

[0012] In some embodiments, the push-knot wire cutter further includes a locking knob, which is radially sleeved between the outer casing and the third tube, and axially located between the blade knob and the end, and the locking knob can lock or unlock the position between the blade tube and the first tube.

[0013] In some embodiments, the housing is further provided with two connection holes for connecting a hemostatic valve;

[0014] In the regions where the components within the outer casing communicate with each of the connecting holes, gap structures for filling with saline solution are prefabricated between the third tube and the first tube, and between the third tube and the second tube.

[0015] In some embodiments, a second notch communicating with the lead wire channel is provided on the outer wall of the second tube.

[0016] In some embodiments, the first notch communicates with the distal end of the first tube; the second notch communicates with the distal end of the second tube.

[0017] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0018] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0019] Figure 1 This is a schematic front view of the push-knot wire cutter in one embodiment of this application. Figure 1 ;

[0020] Figure 2 As shown in one embodiment of this application Figure 1 A schematic diagram of the cross-sectional structure at point AA along the middle edge;

[0021] Figure 3 This is a schematic diagram of the axial structure of the push-knot wire cutter in one embodiment of this application;

[0022] Figure 4 As shown in one embodiment of this application Figure 3 Enlarged structural diagram of the end at point B;

[0023] Figure 5 This is a schematic diagram of the fracture structure of the first tube in one embodiment of this application;

[0024] Figure 6 This is a schematic diagram of the fracture structure of the second tube in one embodiment of this application;

[0025] Figure 7 This is a schematic front view of the push-knot wire cutter in one embodiment of this application. Figure 2 .

[0026] The reference numerals in the detailed embodiments are as follows:

[0027] 2. Wire cutter; 11. End; 12. First tube body; 13. Second tube body; 14. Blade tube; 15. Handle; 16. Outer shell; 17. Connecting hole; 18. Elastic abutment member; 19. Blade knob; 20. Locking knob; 111. Wire guide channel; 121. First notch; 131. Second notch; 132. First groove; 1321. First path segment; 1322. Second path segment; 181. Connecting part; 182. Spring. Detailed Implementation

[0028] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0030] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0031] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0032] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0033] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple groups" refers to two or more (including two groups), and "multiple pieces" refers to two or more (including two pieces).

[0034] In the description of the embodiments of this 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," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0035] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0036] In existing technologies, sutures often need to be cut during internal suturing surgeries. However, current suture cutters cannot perform long-distance suture cutting, for example, they cannot reach the heart region through blood vessels. Furthermore, existing suture cutters frequently experience suture dislodgement after the instrument enters the blood vessel. Therefore, this application aims to provide a solution that can both perform long-distance suture cutting and prevent suture dislodgement after the instrument enters the blood vessel. The specific solution is as follows:

[0037] refer to Figures 1-7 The diagram below shows the relevant structure of the wire cutter described in this application. The structure of the wire cutter of this application will be described below with reference to the accompanying drawings.

[0038] refer to Figure 1 and Figure 2 This application provides a push-knot wire cutter 10, comprising: an end 11, a first tube 12, a second tube 13, and a blade tube 14. The end 11 has an inner cavity, and a wire guide channel 111 is formed within the inner cavity along its axial direction. The first tube 12 is rotatably sleeved within the inner cavity. Further reference... Figure 5 The first tube 12 has a first notch 121 in its wall; the second tube 13 is rotatably sleeved outside the first tube 12 and connected to the end 11; when the first notch 121 is rotated to coincide with the lead suture channel 111, the suture can be detached and pass through the lead suture channel 111 radially through the first notch 121; when the first notch 121 is rotated to be misaligned with the lead suture channel 111, at least a portion of the wall of the first tube 12 is used to block the suture from passing through the lead suture channel 111 radially; the knife tube 14 is rotatably sleeved between the first tube 12 and the second tube 13, and the knife tube 14 is configured to move within the lead suture channel 111 and cooperate with the inner wall of the cavity to cut the suture.

[0039] For example, the end 11, the first tube 12, the second tube 13 and the knife tube 14 are all rotating structures.

[0040] For example, the lengths of the first tube 12, the second tube 13, and the knife tube 14 can be set according to the needs of the actual application. The specific application scenario will be taken into account.

[0041] For example, this application does not limit the shape of the lead channel 111 and the first notch 121, as long as the suture can be inserted and the lead channel 111 can be closed after the first tube 12 is rotated to prevent the suture from falling off.

[0042] Using the suture pusher and cutter 10 of this application, the second tube 13 is fixedly connected to the end 11, the first tube 12 can rotate within the second tube 13 along its own axis, and the blade 14 can rotate between the first tube 12 and the second tube 13 along its own axis. Before pushing and cutting the suture, the first notch 121 of the first tube 12 is aligned with the suture channel 111. The suture, which is connected to the knot inside the body during surgery, is inserted into the suture channel 111. Then, the first tube 12 is rotated so that the first notch 121 and the suture channel 111 are misaligned to ensure that the suture will not fall off through the suture channel 111. Then, the end 11 with the suture, the first tube 12, and the second tube 13 are inserted into the human body through blood vessels until they reach the right / left atrium region or other locations with knots for suture cutting, thus completing long-distance suture cutting.

[0043] In optional embodiments of this application, further reference is made to Figure 4 The end portion 11 is constructed as a rotating body, and the distal end of the end portion 11 is constructed as a planar structure. That is, it can be understood that the distal end of the end portion 11 is used for direct contact with the knot, and the side that directly contacts the knot is constructed as a planar structure. For example, the planar structure can be understood as a shaped planar structure. When the knot pusher / cutter 10 of this application reaches the position of the knot, it pushes the external handle 15, causing the planar structure to directly push the knot, which can lock the knot and further ensure the stability of the knot.

[0044] For example, this application does not limit the shape of the surface region structure of the end 11, as long as a continuous planar structure can be formed. Only under the pushing action of the continuous planar structure can the knot be locked a second time.

[0045] In optional embodiments of this application, further reference is made to Figure 7 The push-knot wire cutter 10 also includes a handle 15 and a housing 16. The housing 16 is installed at the proximal end of the second tube 13, which can be understood as the side near the handle 15. The opposite side is the distal end, which can be understood as the side near the end 11. The handle 15 is located at the proximal end of the housing 16. A first groove 132 is provided on the second tube 13 for connecting with the handle 15. A protrusion (not shown in the figure) is provided on the housing 16. The protrusion slides in engagement with the first groove 132. 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 13 rotates and is positioned at a preset position.

[0046] For example, the first groove 132 of this application can be an L-shaped structure, with the two segments of the L-shaped structure corresponding to the first path segment 1321 and the second path segment 1322, respectively.

[0047] For example, both the handle 15 and the housing 16 are constructed as rotating bodies. This application does not limit the shape of the handle 15 and the housing 16.

[0048] By applying the structure of the first groove 132 and the protrusion as described above, the first tube 12 can be rotated during the pressing and rotating of the handle 15, thereby achieving the effect of preventing the suture from coming off.

[0049] In optional embodiments of this application, further reference is made to Figure 2 An elastic abutment member 18 is provided between the handle 15 and the first tube 12. The elastic abutment member 18 includes a connecting part 181, one end of which has a second groove, and the other end of which has a protrusion. The connecting part 181 is sleeved on the outside of the first tube 12 through the second groove. A spring 182 is sleeved on the protrusion of the connecting part 181. One end of the spring 182 abuts against the inner sidewall of the handle 15, and the other end of the spring 182 abuts against the sidewall where the protrusion connects to the connecting part 181. The structure of the connecting part 181 and the spring 182 allows for installation within the limited space of the handle 15, resulting in a simple structure, convenient use, and easy assembly and disassembly. Furthermore, the elastic abutment member 18 enables stable relative displacement between the handle 15 and the first tube 12, further ensuring the stability of the overall device.

[0050] For example, this application does not limit the specific structure of the connecting part 181, as long as it can stably fit and limit the spring 182.

[0051] For example, the connecting portion 181 of this application is sleeved on the outside of the first tube 12, which can be understood as a relatively fixed connection between the two. This is to prevent the first tube 12 from shaking or shifting radially during rotation.

[0052] In an optional embodiment of this application, the blade tube 14 includes a third tube body near its proximal end and a blade formed on the distal end of the third tube body; a blade knob 19 is provided inside the housing 16, and the blade knob 19 is fixedly sleeved on the outer wall of the third tube body. A connecting structure is also provided inside the housing 16, and the connecting structure is sleeved on the outer wall of the third tube body. The proximal end of the blade knob 19 is threadedly connected to the distal end of the connecting structure, so that when the blade knob 19 moves relative to the connecting structure, it can drive the third tube body to move synchronously. Using the above-described blade tube 14 structure ensures the structural strength of the long-distance blade tube 14.

[0053] For example, the third tube in the blade tube 14 of this application is constructed as a solid structure.

[0054] For example, the blade knob 19 of this application can be a knob made of medical device material.

[0055] In optional embodiments of this application, further reference is made to Figure 2 The connecting structure has a gap groove for the movement of the third tube; the inner wall of the gap groove is used to prevent the third tube from continuously retracting inward, and the inner wall of the inner cavity of the end 11 is used to prevent the blade from continuously extending outward. The inner wall of the inner cavity rubs against the blade to cut the suture.

[0056] In optional embodiments of this application, further reference is made to Figure 3 and Figure 7 The suture cutter 10 also includes a locking knob 20, which is radially fitted between the outer casing 16 and the third tube, and axially located between the blade knob 19 and the end 11. The locking knob 20 can lock or unlock the position between the blade tube 14 and the first tube 12. When the blade position needs to be adjusted, the locking knob 20 is loosened; when the blade is adjusted to the desired position, the locking knob 20 is tightened. This facilitates blade position adjustment and ensures that the blade will not accidentally cut the suture during insertion into the body.

[0057] For example, the locking knob 20 of this application can be a knob made of medical device material.

[0058] In optional embodiments of this application, further reference is made to Figure 1 The outer casing 16 is also provided with two connection holes 17 for connecting the hemostatic valve; in the area where the components inside the outer casing 16 communicate with each connection hole 17, there are pre-fabricated gap structures for filling with physiological saline between the corresponding third tube and the first tube 12, and between the corresponding third tube and the second tube 13.

[0059] For example, the gap structure between the connecting hole 17 and the third tube body and the first tube body 12, as well as the gap structure between the connecting hole 17 and the third tube body and the second tube body 13, are all connected.

[0060] In optional embodiments of this application, further reference is made to Figure 6 The outer wall of the second tube 13 has a second notch 131 that communicates with the lead wire channel 111. The second notch 131 is provided to ensure that the lead wire channel 111 is easy for the suture to pass through.

[0061] In optional embodiments of this application, further reference is made to Figure 5 and Figure 6 The first notch 121 is connected to the distal end of the first tube 12; the second notch 131 is connected to the distal end of the second tube 13. This structural arrangement is to facilitate communication with the lead-in channel 111, so that the external suture can smoothly pass into the lead-in channel 111.

[0062] For example, the first notch 121 and the second notch 131 of this application can be regular or irregular in shape. This application does not limit the shape of the first notch 121 and the second notch 131.

[0063] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0064] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A push-knot wire cutter, characterized in that, include: The end has an inner cavity, and a lead wire channel is provided along its own axial direction, the lead wire channel communicating with the inner cavity; A first tube body is rotatably sleeved in the inner cavity, and a first notch is provided in the tube wall of the first tube body. The second tube is rotatably sleeved outside the first tube, and the second tube is connected to the end. When the first notch is rotated to coincide with the lead channel, the suture can be detached radially through the first notch and exit the lead channel. When the first notch is rotated to a misaligned state with the lead channel, at least a portion of the tube wall of the first tube body is used to prevent the suture from passing through the lead channel radially. A cutting tube is rotatably sleeved between the first tube body and the second tube body. The cutting tube is configured to move within the inner cavity and to cooperate with the cavity wall to cut the suture. It also includes a handle and a housing, the housing being mounted on the proximal end of the second tube body, and the handle being located on the proximal end of the housing; The blade tube includes a third tube body near its proximal end and a blade formed at the distal end of the third tube body; a blade knob is provided inside the housing and is fixedly sleeved on the outer wall of the third tube body; a connecting structure is also provided inside the housing and is sleeved on the outer wall of the third tube body, and the proximal end of the blade knob is threadedly connected to the distal end of the connecting structure so that when the blade knob moves relative to the connecting structure, it can drive the third tube body to move synchronously.

2. The push-knot wire cutter according to claim 1, characterized in that, The end portion is constructed as a rotating body structure, and the distal end portion is constructed as a surface region structure.

3. The push-knot wire cutter according to claim 1, characterized in that, The second tube body has a first groove at the position for connecting with the handle, and the outer shell has a protrusion that slides in conjunction with the first groove. The first groove includes a first path segment extending axially and a second path segment extending circumferentially. When the protrusion slides to the second path segment, the second tube body rotates and is positioned at a preset position.

4. The push-knot wire cutter according to claim 3, characterized in that, An elastic abutment member is provided between the handle and the first tube body; The elastic abutment member includes: a connecting part, one end of which has a second groove and the other end of which has a protrusion. The connecting part is sleeved on the outside of the first tube body through the second groove. A spring is sleeved on the protrusion of the connecting part. 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 protrusion connects to the connecting part.

5. The push-knot wire cutter according to claim 1, characterized in that, The connecting structure has a gap groove for the movement of the third tube; the inner wall of the gap groove is used to prevent the third tube from continuously retracting inward, and the inner wall of the inner cavity at the end is used to prevent the blade from continuously extending outward. The inner wall of the inner cavity rubs against the blade to cut the suture.

6. The push-knot wire cutter according to claim 1, characterized in that, The push-knot wire cutter also includes a locking knob, which is sleeved radially between the outer shell and the third tube, and located axially between the blade knob and the end, and can lock or unlock the position between the blade tube and the first tube.

7. The push-knot wire cutter according to claim 1, characterized in that, The outer casing is also provided with two connection holes for connecting a hemostatic valve. In the regions where the components within the outer casing communicate with each of the connecting holes, gap structures for filling with saline solution are prefabricated between the third tube and the first tube, and between the third tube and the second tube.

8. The push-knot wire cutter according to claim 1, characterized in that, The outer wall of the second tube has a second notch that communicates with the lead wire channel.

9. The push-knot wire cutter according to claim 8, characterized in that, The first notch communicates with the distal end of the first pipe body; the second notch communicates with the distal end of the second pipe body.

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