Catheter cutting device

Abstract

The utility model is suitable for the field of catheter ablation treatment, and provides a catheter cutting device which comprises a cutting assembly, a supporting assembly and a positioning assembly, the cutting assembly comprises a plurality of blades, and the blades are evenly arranged in the circumferential direction during cutting; the supporting assembly is used for supporting the catheter to keep the catheter in a cylindrical shape; the positioning assembly is used for positioning the catheter at a preset position or guiding the catheter to enable the catheter to move in a preset direction; the guide pipe and the cutting assembly move relatively so that the blades can cut the guide pipe in the axial direction of the guide pipe at the same time. The cutting efficiency of the catheter is improved, the accuracy of the cutting process is improved, and deformation and damage of the catheter are avoided.

Description

Technical Field

[0001] The present application belongs to the technical field of catheter ablation therapy, and in particular, relates to a catheter cutting device. Background Art

[0002] The catheter is a tube structure made of polymer material. The catheter has a certain thickness and a central hole. The tube wall of the end face of the catheter is provided with a tube hole. There are multiple tube holes and each tube hole extends along the axial direction through both ends of the catheter. In the manufacturing process of the ablation catheter, the whole catheter needs to be cut along the axial direction, and each cut part has a tube hole (that is, cut along the position between the two tube holes), and then a wire is inserted into the tube hole of each cut part, and then multiple cut parts are clustered together to form a bundle, and then the multiple cut parts are bent outward, and the multiple cut parts are evenly distributed in the circumferential direction, and bent together with the wire to form a treatment head end similar to a petal shape. Generally, the bending part is adjacent to one end of the multiple cut parts, that is, one end of the cut parts is bound together, and the bound end is used as an end point of the bending part and bent to the other end, so that a petal-shaped treatment head end is formed. Electrodes are set at the bending part, and the electrodes conduct the wires. The pulse electric field passes through the several wires in the tube hole to transmit high-voltage energy to the electrodes at the treatment head end, realizing discharge between the electrodes, thereby achieving treatment. After catheter intervention, intermittent high-intensity pulsed electric fields are applied in a very short period of time, causing irreversible damage to the cell membrane through electroporation, thereby achieving pulsed electric field ablation treatment of tissues such as the heart.

[0003] Therefore, the whole catheter needs to be cut into the above-mentioned forms. Manual cutting is not only time-consuming, labor-intensive and inefficient, but also inaccurate cutting can easily cause deformation and damage of the catheter. Utility Model Content

[0004] In view of the above problems, the present application provides a catheter cutting device, which aims to improve the cutting efficiency of the catheter and the accuracy of the cutting process, thereby avoiding deformation and damage of the catheter.

[0005] The present application provides a catheter cutting device, comprising:

[0006] A cutting assembly, the cutting assembly comprising a plurality of blades, the blades being evenly arranged in a circumferential direction during cutting;

[0007] a support assembly for supporting the catheter so that the catheter maintains a columnar shape; and

[0008] A positioning assembly, the positioning assembly is used to position the catheter at a preset position or to guide the catheter so that the catheter moves along a preset direction;

[0009] The catheter and the cutting assembly move relative to each other so that the plurality of blades simultaneously cut the catheter along the axial direction of the catheter. The cutting assembly is provided with a plurality of blades, which can cut the catheter in place at one time, and cut all the tube holes of the catheter independently, thereby improving the cutting efficiency. Moreover, through the positioning of the positioning assembly and the support of the support assembly, the accuracy of the cutting process can be improved, and deformation and damage of the catheter can be avoided.

[0010] In one embodiment, the blades are arranged in a circular array in the circumferential direction during cutting. When arranged in a circular array, multiple blades can simultaneously cut the catheter, with better results. When arranged, the plane where the blades are located is parallel to the axis of the catheter.

[0011] In one embodiment, the catheter includes a central hole and a plurality of tube holes provided on the tube wall along the axial direction, the support assembly includes a needle seat and a positioning needle provided on the needle seat, the positioning needles are multiple and arranged in parallel with each other, the positioning needles are respectively used to be inserted into corresponding tube holes to support the catheter, and the needle seat is provided with an avoidance hole. Since the support assembly is provided, the catheter can be supported during cutting, so that the catheter can be kept in a cylindrical shape to avoid collapse, thereby ensuring the accuracy of cutting.

[0012] In one embodiment, the positioning component includes:

[0013] A support platform, wherein a first arc-shaped groove is provided on the support platform; and

[0014] The moving block is provided with a second arc groove, and the moving block moves in a vertical direction by means of a driving mechanism to make the first arc groove approach or move away from the second arc groove, and the conduit is used to be arranged between the first arc groove and the second arc groove to be positioned at the preset position or move along a preset direction. The positioning component can position the conduit well to ensure the accuracy during cutting.

[0015] In one embodiment, the direction in which the catheter and the cutting assembly move relative to each other is a first direction, and the blade of the blade for cutting the catheter extends along a second direction, and the angle between the second direction and the first direction is an acute angle. This is equivalent to setting the blade tilted, that is, tilted relative to the catheter, which can reduce cutting resistance during cutting and achieve better cutting effect.

[0016] In one embodiment, the cutting assembly further comprises a knife bar, the blade is connected to the knife bar, and the knife bar is used to pass through the central hole of the catheter so that the blade cuts the catheter. The cutting assembly in the form of a knife bar has a simple structure, is easy to operate, and can still maintain rapidity and accuracy of cutting.

[0017] In one embodiment, the cutting assembly further comprises:

[0018] A knife seat, the knife seat is fixedly arranged, the knife seat has a through hole for the catheter to pass through, and the knife seat has a plurality of positioning grooves evenly arranged in the circumferential direction; and

[0019] A pressing block, the pressing block is arranged in the positioning groove, the blade is arranged in the positioning groove and squeezed between the pressing block and the groove wall of the positioning groove, and the end of the blade is exposed from the positioning groove and is located in the through hole;

[0020] The conduit is used to pass through the through hole so that the blade cuts the conduit. The cutting assembly meets the use requirements of the conduit moving and the cutting assembly being fixed, and the cutting is also fast, accurate and reliable.

[0021] In one embodiment, one side wall of the positioning groove is an inclined surface, the pressing block is in contact with the inclined surface, and the pressing block moves along the inclined surface with the aid of an elastic member so that the pressing block presses the blade at the other side wall of the groove. The blade is detachably assembled and can be well fixed, so that it can avoid being moved due to force during cutting, thereby ensuring the cutting effect.

[0022] In one embodiment, the support assembly further includes a core rod inserted into the central hole of the catheter, thereby further maintaining the circular characteristics of the catheter and ensuring the cutting effect.

[0023] In one embodiment, the cutting assembly further comprises a fixing seat, the knife seat is connected to the fixing seat by magnetic attraction, and the knife seat and the fixing seat are relatively positioned by matching positioning holes and positioning pins. The fixing seat is arranged on one side of the support platform, and is used to install the knife seat. In order to facilitate the installation of the knife seat on the fixing seat by magnetic attraction, it is convenient for disassembly and assembly, that is, after cutting is completed, the internal conduit can be taken out by disassembling the knife seat, and the knife seat and the fixing seat are mutually positioned by positioning holes and positioning pins to ensure the accuracy of installation.

[0024] In one embodiment, the cutting assembly further includes a moving seat, and there are multiple moving seats, on which the blade is arranged, and the moving seat is used to move along the radial direction of the catheter to adjust the radial distance between the blade and the catheter. The entire catheter may not be completely cut along the axial direction, that is, only a section is cut, and when bending, only this cut section is bent. Since other parts are not cut, the operation of binding other parts again is omitted, thereby achieving a better use effect.

[0025] In one embodiment, the cutting assembly further includes a driving unit, which is used to drive the moving seat to move and enable the moving seat to be positioned at any position of the moving path. The driving unit is used to drive the moving seat to move, so that the stability is better. By driving the moving seat to move by the driving unit, the moving position and distance of the moving seat can be effectively controlled, and the operability is stronger.

[0026] In one embodiment, the driving part is one or more of a cylinder, an electric push rod, a screw mechanism, and a manual adjustment assembly. The cylinder and the electric push rod are easy to operate, and the push end thereof can be connected to the moving seat, so that the moving seat can be moved in a controlled manner. The screw mechanism has a relatively low setting cost, and the nut of the screw mechanism can be connected to the moving seat, and the nut can be moved by rotating the screw rod, thereby moving the moving seat.

[0027] In one embodiment, the positioning component includes:

[0028] a backing rod, the backing rod being partially inserted into the conduit; and

[0029] A driving assembly is used to drive the liner rod and the catheter to move along the preset direction, thereby realizing the positioning of the moving direction of the catheter, so that the catheter can move along the preset axial direction.

[0030] In one embodiment, the catheter includes a central hole and a plurality of tube holes axially opened on the tube wall, the support assembly includes a needle seat and a positioning needle arranged on the needle seat, the positioning needles are multiple and arranged parallel to each other, the positioning needles are respectively used to be inserted into corresponding tube holes to support the catheter, the needle seat includes an avoidance hole, and the needle seat is sleeved on the backing rod through the avoidance hole.

[0031] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0033] Figure 1 A schematic diagram of the structure of a catheter in some embodiments of the present application;

[0034] Figure 2 This is a schematic diagram of the structure of a blade cutting a catheter in some embodiments of the present application;

[0035] Figure 3 This is a schematic diagram of the structure of a catheter cutting device in some embodiments of the present application;

[0036] Figure 4 This is a schematic diagram of the structure of the support assembly of some embodiments of the present application;

[0037] Figure 5 It is a schematic diagram of the structure of the support assembly of some other embodiments of the present application;

[0038] Figure 6 A schematic diagram of the structure of a cutting assembly in some embodiments of the present application;

[0039] Figure 7 It is a structural schematic diagram of a catheter cutting device in some other embodiments of the present application;

[0040] Figure 8 for Figure 7 Schematic diagram of the structure from another angle;

[0041] Fig. 9 for Figure 7 Schematic diagram of some structures in ;

[0042] Fig.10 for Figure 8 Schematic diagram of the structure inside the middle knife holder;

[0043] Fig.11 This is a schematic structural diagram of a catheter cutting device according to some other embodiments of the present application;

[0044] Fig.12 for Fig.11 Schematic diagram of the structure from another perspective;

[0045] Fig.13 for Fig.12 A schematic diagram of the enlarged structure at A in the middle;

[0046] Fig.14 for Fig.11 Schematic diagram of the structure from another perspective.

[0047] The reference numerals in the specific implementation manner are as follows:

[0048] 1. Cutting assembly; 11. Blade; 12. Knife bar; 13. Knife seat; 14. Fixed seat; 15. Press block; 16. Through hole;

[0049] 2. Support assembly; 21. Needle seat; 22. Positioning needle; 23. Avoidance hole;

[0050] 3. Positioning assembly; 31. Support table; 32. Moving block;

[0051] 4. catheter; 41. center hole; 42. tube hole;

[0052] 5. Driving mechanism;

[0053] 6. Putting;

[0054] 7. Mobile seat;

[0055] 8. Driving unit;

[0056] 9. Lining rod;

[0057] 10. Drive components. DETAILED DESCRIPTION

[0058] The following embodiments of the technical solution of the present application will be described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0059] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0060] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0061] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0062] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0063] 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 groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0064] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0065] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0066] The embodiments of the technical solution of the present application will be described in detail below with reference to the accompanying drawings.

[0067] See also Figure 1-Figure 10 The present application provides a specific embodiment of a catheter cutting device, including a cutting component 1, a supporting component 2, and a positioning component 3.

[0068] Among them, the cutting component 1 includes multiple blades 11, which are evenly arranged in the circumferential direction during cutting; the supporting component 2 is used to support the catheter 4 so that the catheter 4 maintains a columnar shape; the positioning component 3 is used to position the catheter 4 at a preset position or to guide the catheter 4 so that the catheter 4 moves along a preset direction; when in use, the catheter 4 and the cutting component 1 move relative to each other so that the multiple blades 11 simultaneously cut the catheter 4 along the axial direction of the catheter 4.

[0069] like Figure 1The commonly used catheter 4 is cylindrical, has an inner cavity, i.e., a center hole 41, and has a certain wall thickness. A tube hole 42 is provided on the end wall of the catheter 4, and the tube hole 42 is used to set the wire. Usually, each catheter 4 has a plurality of tube holes 42 in the circumferential direction, and a plurality of wires can be set. Before use, the catheter 4 needs to be cut along the axial direction to cut out each tube hole 42 to form a cut portion.

[0070] Therefore, in order to achieve the above purpose, the cutting assembly 1 of the catheter 4 provided in this embodiment includes a plurality of blades 11, and specifically, the number of the blades 11 is the same as the number of the tube holes 42 on the catheter 4. The blades 11 cut the tube wall portion between two tube holes 42 during cutting. Figure 2 In order to better achieve one-time cutting, multiple blades 11 need to be set in the circumferential direction during cutting. When cutting, multiple blades 11 cut the tube wall at the same time, and each blade 11 cuts the tube wall portion between two tube holes 42.

[0071] Since the conduit 4 is relatively soft, it needs to be kept in a columnar shape during cutting to achieve smooth cutting. Therefore, this embodiment provides a support component 2, which is used to support the conduit 4 and keep it in a columnar state, which facilitates cutting and improves accuracy. When cutting, the conduit 4 and the cutting component 1 are relatively moved to achieve the desired effect. In the first case, as shown in FIG. Figure 7 , the guide tube 4 moves relative to the blade 11 of the cutting assembly 1, or the second case is as follows Figure 3 The blade 11 of the cutting component 1 moves relative to the catheter 4 to achieve cutting. In order to improve the accuracy, in the first case, when the catheter 4 moves relative to the blade 11 of the cutting component 1, it is necessary to keep the catheter 4 moving along the preset direction without deviation. In the second case, when the blade 11 moves relative to the catheter 4, the catheter 4 needs to remain stationary, so that the accuracy of cutting can be guaranteed. Therefore, this embodiment provides a positioning component 3, and the function of the positioning component 3 is to position the catheter 4 at a preset position or to guide the catheter 4 so that the catheter 4 moves along a preset direction.

[0072] Therefore, the effect of the catheter cutting device provided in this embodiment is that the cutting component 1 is provided with multiple blades 11, which can cut the catheter 4 in place at one time, thereby improving the cutting efficiency, and through the positioning of the positioning component 3 and the support of the support component 2, the accuracy in the cutting process can be improved, thereby avoiding deformation and damage of the catheter 4.

[0073] like Figure 2In one embodiment, the blades 11 are arranged in a circular array in the circumferential direction when cutting. Specifically, when arranged in a circular array, multiple blades 11 can simultaneously cut the catheter 4, with better effect. And when arranged, the plane where the blades 11 are located is parallel to the axis of the catheter 4.

[0074] like Figure 1 and Figure 4 In one embodiment, the catheter 4 includes a central hole 41 and a plurality of tube holes 42 axially opened on the tube wall. The support assembly 2 includes a needle seat 21 and a positioning needle 22 arranged on the needle seat 21. There are multiple positioning needles 22 and they are arranged in parallel with each other. The multiple positioning needles 22 are arranged on the same circle. The positioning needles 22 are respectively used to be inserted into the corresponding tube holes 42 to support the catheter 4. The needle seat 21 is provided with an avoidance hole 23.

[0075] Specifically, the central hole 41 is the inner cavity of the catheter 4 , and the tube holes 42 are used to accommodate the guide wires. Generally, the plurality of tube holes 42 are evenly distributed along the circumference of the catheter 4 .

[0076] In this embodiment, the support assembly 2 includes a needle seat 21 and a positioning needle 22 arranged on the needle seat 21. The needle seat 21 can be set into any shape as needed, specifically, it can be set into a rectangular shape, and then a plurality of positioning needles 22 are arranged side by side on one side of the rectangular shape, that is, the same side ends of the plurality of positioning needles 22 are connected to the side wall of the needle seat 21, and the plurality of positioning needles 22 are arranged in a cantilever form. The number of positioning needles 22 can be the same as the number of tube holes 42, and they are parallel to each other. The positioning needles 22 can be inserted one by one into the corresponding tube holes 42. The positioning needles 22 have a certain length, which can be the same as the length of the catheter 4 or greater than the length of the catheter 4. The cross section of the positioning pin 22 can be the same as the cross section of the tube hole 42, or when the cross section of the positioning pin 22 is smaller than the cross section of the tube hole 42, it can also be set so that when some positioning pins 22 are inserted into the tube hole 42, they abut against the side wall of one end of the tube hole 42 in the circumferential direction, and when other positioning pins 22 are inserted into the tube hole 42, they abut against the opposite side wall of the other end of the tube hole 42 in the circumferential direction. In this way, the catheter 4 can be effectively positioned to prevent the catheter 4 from rotating, and it also supports the catheter 4 to prevent it from collapsing. The setting of the avoidance hole 23 can avoid some structures. For example, when the knife rod 12 enters the inner cavity of the catheter 4 for cutting, the knife rod 12 passes through the center hole 41, and the blade 11 on the knife rod 12 cuts the catheter 4 at the same time. At this time, the avoidance hole 23 is used to avoid the knife rod 12, that is, for the knife rod 12 to pass through.

[0077] Alternatively, you can set it like this, see Figure 5Two needle seats 21 can be provided, one end of the plurality of positioning needles 22 is connected to the side wall of one needle seat 21, and at the same time passes through and is fixedly connected to the other needle seat 21, there is a distance between the two needle seats 21, and the plurality of positioning needles 22 are still arranged in a cantilever form after passing through the other needle seat 21. This makes the arrangement of the positioning needles 22 more stable and has a higher support strength.

[0078] The effect of this embodiment is that, since the support assembly 2 is provided, the catheter 4 can be supported during cutting, so that the catheter 4 can be kept in a cylindrical shape and avoid collapse, thereby ensuring the accuracy of cutting.

[0079] like Figure 3 or Figure 7 , Fig. 9 In one embodiment, the positioning assembly 3 includes a supporting platform 31 and a moving block 32 .

[0080] The support platform 31 is provided with a first arc groove; the moving block 32 is provided with a second arc groove, and the moving block 32 moves in the vertical direction by means of the driving mechanism 5 so that the first arc groove approaches or moves away from the second arc groove, and the guide tube 4 is used to be arranged between the first arc groove and the second arc groove to be positioned at a preset position or move along a preset direction. The driving mechanism 5 can be a cylinder or a moving part arranged on a linear guide rail, and the moving part is connected to the moving block 32, etc.

[0081] Specifically, the support platform 31 can be set on the ground, and it has a certain height. The first arc groove is provided on the surface of the support platform 31, and the moving block 32 is arranged above the support platform 31. The second arc groove is provided on the lower surface of the moving block 32. The shape and size of the first arc groove can be the same as the shape and size of the second arc groove, and the second arc groove is located directly above the first arc groove. When in use, the catheter 4 is placed in the first arc groove, and the second arc groove is gradually approached to the first arc groove by the downward movement of the moving block 32. When it reaches a certain degree, it produces a certain extrusion on the catheter 4, thereby realizing the positioning of the catheter 4. It should be noted that when the catheter 4 needs to move along the preset direction, the extrusion force can be adjusted so that it can move along the length direction of the first arc groove and the second arc groove under a certain thrust, and the groove wall of the first arc groove and the second arc groove plays a certain guiding role in the movement of the catheter 4. At this time, the preset direction is the length direction of the first arc groove and the second arc groove, and the blade 11 can be cut by moving along this direction.

[0082] It should be noted that when the catheter 4 moves, the catheter 4 can be moved by pushing the needle seat 21, and the first arc groove and the second arc groove do not completely wrap the catheter 4. There is a certain gap between the surface of the support platform 31 and the lower surface of the moving block 32. When pushing, the needle seat 21 can be located in this gap, which will not hinder the movement of the needle seat 21.

[0083] The positioning assembly 3 provided in this embodiment can position the catheter 4 well, ensuring accuracy during cutting.

[0084] like Figure 6 or Fig.10 In one embodiment, the direction of relative movement between the catheter 4 and the cutting assembly 1 is a first direction, the blade 11 for cutting the catheter 4 extends along a second direction, and the angle between the second direction and the first direction is an acute angle.

[0085] Specifically, this is equivalent to setting the blade 11 at an angle, that is, setting it at an angle relative to the catheter 4, which can reduce the cutting resistance during the cutting process and achieve a better cutting effect.

[0086] like Figure 4 and Figure 6 In one embodiment, the cutting assembly 1 further comprises a knife bar 12, the blade 11 is connected to the knife bar 12, and the knife bar 12 is used to pass through the central hole 41 of the catheter 4 so that the blade 11 cuts the catheter 4. The needle seat 21 may be provided with an avoidance hole 23 for avoiding the knife bar 12, and the knife bar 12 may have a tail portion with a rectangular cross section, and the tail portion may be overlapped on the support platform 31.

[0087] Specifically, when the catheter 4 is fixed and the cutting assembly 1 is moved relative to the catheter 4 for cutting, the cutting assembly 1 includes a knife bar 12, and a blade 11 is arranged on the knife bar 12. The knife bar 12 can be cylindrical. During the specific operation, the knife bar 12 can be passed through the central hole 41 of the catheter 4. When one end is exposed, the knife bar 12 is pulled, and the blade 11 arranged on the other end of the knife bar 12 cuts the catheter 4. At this time, the catheter 4 is positioned by the positioning assembly 3 and remains motionless.

[0088] When there is a needle seat 21, in order not to block the movement of the knife rod 12, an avoidance hole 23 is provided on the needle seat 21, so that the knife rod 12 can pass through. The avoidance hole 23 can be located in the middle of the plurality of positioning needles 22, that is, the plurality of positioning needles 22 are arranged around the avoidance hole 23.

[0089] In addition, in order to increase the stability of the movement of the knife rod 12, the present embodiment also sets the end of the knife rod 12 where the blade 11 is not set to have a rectangular cross-section, that is, the tail is a rectangular parallelepiped. When the knife rod 12 is pulled, the tail can be overlapped on the support platform 31, which can prevent the knife rod 12 from rotating and ensure the accuracy of cutting.

[0090] Therefore, the cutting assembly 1 in the form of the knife bar 12 provided in this embodiment has a simple structure and is easy to operate, while still being able to maintain rapidity and accuracy in cutting.

[0091] like Figure 7 , Figure 8 , Fig. 9 and Fig.10 In another embodiment, the cutting assembly 1 may also be configured such that when the guide tube 4 moves and the cutting assembly 1 is fixed, the cutting assembly 1 includes a knife holder 13 and a pressing block 15 .

[0092] The knife seat 13 is fixedly arranged, and has a through hole 16 for the guide tube 4 to pass through. The knife seat 13 has a plurality of positioning grooves evenly arranged in the circumferential direction.

[0093] The pressing block 15 is arranged in the positioning groove, the blade 11 is arranged in the positioning groove and squeezed between the pressing block 15 and the positioning groove wall, the end of the blade 11 is exposed from the positioning groove and is located in the through hole 16; the catheter 4 is used to pass through the through hole 16 so that the blade 11 cuts the catheter 4.

[0094] Specifically, the knife seat 13 can be a circular seat structure, which is provided with a through hole 16 for the catheter 4 to pass through, and the blade 11 is set on the knife seat 13, and the blade 11 is exposed from the through hole 16. When the catheter 4 passes through the through hole 16, it is cut by the blade 11.

[0095] The blade 11 is installed in this way: a positioning groove is set on the blade seat 13, and a pressure block 15 is set in the positioning groove. The shape of the pressure block 15 is adapted to the positioning groove, and the positioning groove is connected to the through hole 16. The blade 11 is squeezed between the pressure block 15 and the groove wall of the positioning groove, and the blade end extends from the positioning groove into the through hole 16, so that the blade 11 can be fixed.

[0096] The plurality of blades 11 are exposed from the through hole 16 and arranged in a circumferential direction in the through hole 16, and can be cut when the catheter 4 passes through. The through hole 16 can be trumpet-shaped, which is conducive to guiding the catheter 4. At this time, the positioning component 3 plays a guiding role in the movement of the catheter 4.

[0097] It should be noted that in this embodiment, if the above-mentioned support assembly 2 with a needle seat 21 and a positioning needle 22 is used, the needle seat 21 can be set at the tail end of the catheter 4 in the moving direction, so that the needle seat 21 will not collide with the blade 11 and will not hinder the cutting of the blade 11.

[0098] The cutting assembly 1 provided in this embodiment meets the use requirements of the catheter 4 moving the cutting assembly 1 and fixing it, and the cutting is also fast, accurate and reliable.

[0099] like Figure 7 Further, the catheter cutting device may further include a push rod 6, which is used to push the needle seat 21 or directly push the catheter 4 to allow the catheter 4 to pass through the through hole 16. The setting of the push rod 6 can facilitate the movement of the catheter 4, which is more labor-saving and convenient.

[0100] like Figure 8 and Fig.10 In one embodiment, one side wall of the positioning groove is an inclined surface, and the pressing block 15 is in contact with the inclined surface. The pressing block 15 moves along the inclined surface with the aid of an elastic member so that the pressing block 15 presses the blade 11 at the other side wall of the groove.

[0101] Specifically, in order to enable the pressure block 15 to maintain the squeezing pressure on the blade 11, the groove wall on one side of the positioning groove is set to an inclined surface, and the pressure block 15 is in contact with the inclined surface. When the pressure block 15 moves, it will move along the inclined surface, thereby squeezing the blade 11 on the other side, and then pressing the blade 11. The movement of the pressure block 15 is achieved with the help of the pushing of the elastic member, or in other words, under the elastic force of the elastic member and with the help of the guidance of the inclined surface, the pressure block 15 maintains the squeezing pressure on the blade 11 to position the blade 11.

[0102] Therefore, in this embodiment, the blade 11 is detachably assembled and can be well fixed, so that it can avoid movement due to force during the cutting process, thereby ensuring the cutting effect.

[0103] In one embodiment, the support assembly 2 further includes a mandrel inserted into the central hole 41 of the catheter 4. Specifically, when the mandrel is inserted, the catheter 4 moves while the cutting assembly 1 is fixed, so that the inner cavity of the catheter 4 is filled, further maintaining the circular characteristics of the catheter 4 and ensuring the cutting effect.

[0104] like Figure 7 In one embodiment, the cutting assembly 1 further includes a fixing seat 14, and the knife seat 13 is connected to the fixing seat 14 by magnetic attraction. The knife seat 13 and the fixing seat 14 are relatively positioned by matching positioning holes and positioning pins.

[0105] Specifically, the fixing seat 14 is arranged on one side of the support platform 31, and is used to install the knife seat 13. In order to facilitate the installation of the knife seat 13 on the fixing seat 14, the knife seat 13 is magnetically attracted, which facilitates disassembly and assembly. That is, after the cutting is completed, the internal catheter 4 can be taken out by disassembling the knife seat 13, and the knife seat 13 and the fixing seat 14 are positioned with each other through positioning holes and positioning pins to ensure the accuracy of the installation.

[0106] It should be noted that when the catheter 4 is cut, the catheter 4 can be completely cut along the axial direction to form a plurality of independent cut parts. When in use, all the cut parts are clustered together, and only one section of the cut part needs to be bent to form a petal shape, and the parts that are not bent still need to be tied together. Generally, the bent part is adjacent to one end of the plurality of cut parts, that is, one end of the cut parts is tied together, and the tied end is used as an end point of the bent part and bent toward the other end, so that a petal-shaped treatment head end is formed. Therefore, in some cases, it is not necessary to completely cut the entire catheter, and only the part that needs to be bent needs to be cut.

[0107] Based on this, the present application provides another embodiment, please refer to Figure 11-Figure 14 In another embodiment, the cutting assembly 1 further includes a movable seat 7, wherein the movable seat 7 is multiple, and a blade 11 is disposed on the movable seat 7. The movable seat 7 is used to move along the radial direction of the conduit 4 to adjust the radial distance between the blade 11 and the conduit 4.

[0108] In this embodiment, the entire catheter 4 does not need to be completely cut along the axial direction, that is, only a section is cut, and when bending, only this cut section is bent. Since the other parts are not cut, the operation of binding the other parts again is omitted, thereby achieving a better use effect.

[0109] Specifically, since the distance between the blade 11 and the catheter 4 in the radial direction of the catheter 4 can be adjusted, when the blade 11 and the catheter 4 move relative to each other in the axial direction, it is not necessary to start cutting from the head end of the catheter 4, and the cutting position can be selected as needed. For example, when the catheter 4 moves to a suitable position in the axial direction, the position of the blade 11 in the radial direction is adjusted so that the blade 11 touches the catheter 4, and the cutting starts from the touching position. When the catheter 4 moves to another position in the axial direction, the blade 11 moves back and leaves the catheter 4, so that the cutting is performed at the designated position of the catheter 4, and the cut portion is formed, and the cut portion can be bent.

[0110] The movement of the blade 11 is performed by means of the moving seat 7, and the moving seat 7 is used to move along the radial direction of the catheter 4. Since the moving seat 7 is provided, a fixed structure is provided for the blade 11. In addition, some structures can be provided to set the moving seat 7, which can be some cubic-shaped seats, and the moving seat 7 can be arranged on the seat along the circumferential direction, and a track can also be provided to move the moving seat 7.

[0111] Furthermore, the cutting assembly 1 further comprises a driving unit 8, which is used to drive the moving seat 7 to move and enable the moving seat 7 to be positioned at any position of the moving path.

[0112] Specifically, the driving part 8 is used to drive the moving seat 7 to move, so that the stability is better. By driving the moving seat 7 to move through the driving part 8, the moving position and distance of the moving seat 7 can be effectively controlled, and the operability is stronger.

[0113] Furthermore, the driving part 8 is one or more of a cylinder, an electric push rod, a screw mechanism, and a manual adjustment component.

[0114] Specifically, the cylinder and the electric push rod are easy to operate, and the push end thereof can be connected to the moving seat 7, so that the moving seat 7 can be moved in a controlled manner. The screw mechanism has a relatively low setting cost, and the nut of the screw mechanism can be connected to the moving seat 7, and the nut can be moved by rotating the screw rod, so that the moving seat 7 can be moved.

[0115] Alternatively, the driving part 8 can also be other manual adjustment components. Specifically, it can include a threaded seat and a push screw. The threaded seat is provided with a screw hole adapted to the push screw. The push screw thread is assembled in the screw hole. By twisting the push screw, the push screw will move, so that the push end of the push screw can contact the moving seat 7, thereby pushing the moving seat 7. At the same time, a spring can be provided, and the spring is used to rebound the moving seat 7, that is, when the push screw pushes the moving seat 7, the spring will be compressed, and when the push screw moves in the opposite direction, the spring will rebound. The provision of the spring can realize the reverse movement of the moving seat 7, and at the same time can enhance the stability of the movement of the moving seat 7.

[0116] For further information, see Fig.12 and Fig.13 When the above embodiment is adopted, the positioning assembly 3 may include a liner rod 9 and a driving assembly 10.

[0117] The liner rod 9 is partially inserted into the conduit 4; the driving assembly 10 is used to drive the liner rod 9 and the conduit 4 to move along a preset direction.

[0118] Specifically, since the catheter 4 needs to move along the axial direction, a driving assembly 10 is provided. However, the driving assembly 10 cannot directly drive the catheter 4 to move well, so a liner rod 9 is provided in the catheter 4. The liner rod 9 is partially inserted into the catheter 4, and the portion not inserted into the catheter 4 is connected to the driving assembly 10. The liner rod 9 is moved by the driving assembly 10, thereby moving the catheter 4.

[0119] Since the position of the driving component 10 is fixed and the driving direction of the driving component 10 is fixed, the driving component 10 drives the lining rod 9 along the fixed direction, so that the lining rod 9 moves along the fixed direction, thereby causing the catheter 4 to move along the fixed direction. This is equivalent to achieving the positioning of the moving direction of the catheter 4, so that the catheter 4 can move along the preset axial direction.

[0120] The driving component 10 can be selected as a cylinder, an electric push rod, etc.

[0121] For further information, please refer to Fig.12 and Fig.13 as well as Figure 4 In this embodiment, a support assembly 2 is also provided. The support assembly 2 is to keep the catheter 4 in a columnar shape. Although the liner rod 9 also plays a supporting role to a certain extent, the support effect of the support assembly 2 is better. Specifically, the catheter 4 includes a central hole 41 and a plurality of tube holes 42 provided on the tube wall along the axial direction. The support assembly 2 includes a needle seat 21 and a positioning needle 22 provided on the needle seat 21. The positioning needles 22 are multiple and arranged parallel to each other. The positioning needles 22 are respectively used to be inserted into the corresponding tube holes 42 to support the catheter 4. The needle seat 21 includes an avoidance hole 23. The needle seat 21 is sleeved on the liner rod 9 through the avoidance hole 23.

[0122] like Figure 4The support assembly 2 includes a needle seat 21 and a positioning needle 22 arranged on the needle seat 21. The needle seat 21 can be set into any shape as needed, specifically, it can be set into a rectangular shape, and then a plurality of positioning needles 22 are arranged side by side on one side of the rectangular shape, that is, the same side ends of the plurality of positioning needles 22 are connected to the side wall of the needle seat 21, and the plurality of positioning needles 22 are arranged in a cantilever form. The number of positioning needles 22 can be the same as the number of tube holes 42, and they are parallel to each other. The positioning needles 22 can be inserted one by one into the corresponding tube holes 42. The positioning needles 22 have a certain length, which can be the same as the length of the catheter 4 or greater than the length of the catheter. The cross-section of the positioning needle 22 can be the same as that of the tube hole 42, or when the cross-section of the positioning needle 22 is smaller than that of the tube hole 42, it can also be arranged so that when some positioning needles 22 are inserted into the tube hole 42, they abut against the side wall of one end of the tube hole 42 in the circumferential direction, and when other positioning needles 22 are inserted into the tube hole 42, they abut against the opposite side wall of the other end of the tube hole 42 in the circumferential direction. This can also effectively position the catheter 4 to prevent the catheter 4 from rotating, and also provide support for the catheter 4 to prevent it from collapsing.

[0123] The avoidance hole 23 is arranged so that the needle seat 21 can be put on the backing rod 9 through the avoidance hole 23 and fixed to the backing rod 9, thereby realizing the fixation of the needle seat 21 and the fixation of the positioning needle 22. After the positioning needle 22 is fixed, it can well support the catheter 4 and tighten the catheter 4.

[0124] By inserting the positioning needle 22 into the tube hole 42 , the catheter 4 can be supported, and at the same time the backing rod 9 is also inserted into the catheter 4 , and the needle seat 21 is then sleeved through the avoidance hole 23 and fixed on the backing rod 9 .

[0125] The driving assembly 10 drives the backing rod 9 to move, thereby causing the catheter 4 and the needle seat 21 and the positioning needle 22 to move synchronously. When passing through the blade 11, the catheter 4 can be cut.

[0126] Similarly, it should be noted that the needle seat 21 is arranged at the tail end of the catheter 4 in the moving direction, so that it will not collide with the blade 11, thereby avoiding obstruction to the cutting of the blade 11.

[0127] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A catheter cutting device, characterized in that: include: A cutting assembly, the cutting assembly comprising a plurality of blades, the blades being evenly arranged in a circumferential direction during cutting; A support assembly, the support assembly being used to support the catheter so that the catheter maintains a columnar shape; as well as A positioning assembly, the positioning assembly is used to position the catheter at a preset position or to guide the catheter so that the catheter moves along a preset direction; The catheter and the cutting assembly move relative to each other so that the plurality of blades cut the catheter along the axial direction of the catheter at the same time.

2. The catheter cutting device according to claim 1, characterized in that: The blades are arranged in a circular array in the circumferential direction during cutting.

3. The catheter cutting device according to claim 1, characterized in that: The catheter includes a central hole and a plurality of tube holes opened axially on the tube wall. The support assembly includes a needle seat and a positioning needle arranged on the needle seat. The positioning needles are multiple and arranged parallel to each other. The positioning needles are respectively used to be inserted into corresponding tube holes to support the catheter. An avoidance hole is arranged on the needle seat.

4. The catheter cutting device according to claim 1, characterized in that: The positioning component comprises: A support platform, wherein a first arc-shaped groove is provided on the support platform; and A moving block is provided with a second arc groove, and the moving block moves in a vertical direction with the aid of a driving mechanism to make the first arc groove approach or move away from the second arc groove, and the conduit is used to be arranged between the first arc groove and the second arc groove to be positioned at the preset position or move along a preset direction.

5. The catheter cutting device according to claim 1, characterized in that: The direction in which the catheter and the cutting assembly move relative to each other is a first direction, and the blade of the blade for cutting the catheter extends along a second direction, and the angle between the second direction and the first direction is an acute angle.

6. The catheter cutting device according to any one of claims 1 to 5, characterized in that: The cutting assembly further comprises a knife bar, the knife blade is connected to the knife bar, and the knife bar is used to pass through the central hole of the catheter so that the knife blade cuts the catheter.

7. The catheter cutting device according to any one of claims 1 to 5, characterized in that: The cutting component also includes: A knife seat, the knife seat is fixedly arranged, the knife seat has a through hole for the catheter to pass through, and the knife seat has a plurality of positioning grooves evenly arranged in the circumferential direction; and A pressing block, the pressing block is arranged in the positioning groove, the blade is arranged in the positioning groove and squeezed between the pressing block and the groove wall of the positioning groove, and the end of the blade is exposed from the positioning groove and is located in the through hole; The conduit is used to pass through the through hole so that the blade cuts the conduit.

8. The catheter cutting device according to claim 7, characterized in that: One side wall of the positioning groove is an inclined surface, the pressing block is in contact with the inclined surface, and the pressing block moves along the inclined surface with the aid of an elastic member so that the pressing block presses the blade at the other side wall of the groove.

9. The catheter cutting device according to claim 7, characterized in that: The support assembly also includes a core rod inserted into the central hole of the catheter.

10. The catheter cutting device according to claim 7, characterized in that: The cutting assembly also includes a fixing seat, the knife seat is connected to the fixing seat by magnetic attraction, and the knife seat and the fixing seat are relatively positioned by matching positioning holes and positioning pins.

11. The catheter cutting device according to any one of claims 1, 2 or 5, characterized in that: The cutting assembly further comprises a plurality of movable seats, on which the blade is arranged, and the movable seat is used to move along the radial direction of the conduit to adjust the radial distance between the blade and the conduit.

12. The catheter cutting device according to claim 11, characterized in that: The cutting assembly further comprises a driving part, and the driving part is used for driving the moving seat to move and can position the moving seat at any position of the moving path.

13. The catheter cutting device according to claim 12, characterized in that: The driving part is one or more of a cylinder, an electric push rod, a screw mechanism, and a manual adjustment component.

14. The catheter cutting device according to claim 11, characterized in that: The positioning component comprises: a backing rod, the backing rod being partially inserted into the conduit; and A driving assembly is used to drive the liner rod and the guide tube to move along the preset direction.

15. The catheter cutting device according to claim 14, characterized in that: The catheter includes a central hole and a plurality of tube holes axially opened on the tube wall; the support assembly includes a needle seat and a positioning needle arranged on the needle seat; the positioning needles are multiple and arranged parallel to each other; the positioning needles are respectively used to be inserted into corresponding tube holes to support the catheter; the needle seat includes an avoidance hole, and the needle seat is sleeved on the backing rod through the avoidance hole.

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