A multi-directional, multi-section bend-controlled catheter design

Abstract

The present invention discloses a multi-directional, multi-section bending control catheter design, including a catheter, a handle and an imitation spine component. The handle is fixedly mounted on the end of the catheter, and a bending control piece is provided on the handle. The bending control piece is connected to the imitation spine component. The catheter is divided into three sections: a distal bending section, a middle bendable section and a main section. The imitation spine component is distributed at different distal positions of the catheter and on different sections of the catheter. When the bending control piece pulls the imitation spine component, the catheter can be bent in multiple directions and in multiple sections. The present invention realizes that the metal parts, spring tubes and pull wires constitute an imitation spine component through the coordination of the above structures. The number of imitation spine components and their distribution positions on the catheter are adjusted, and then the imitation spine components are pulled by the pull wire to achieve different bending effects of the catheter.

Description

Technical Field

[0001] The present invention relates to the field of catheter technology, and in particular to a multi-directional, multi-section bend-controlled catheter design. Background Art

[0002] Controllable bend catheters / sheaths are widely used in interventional procedures. Currently, the most common method for controlling the bend of controllable bend sheaths is to secure a traction wire to the distal end of the sheath. Pulling the traction wire moves the distal end, thereby achieving a bending effect. This has led to a series of structural designs that control the bending of catheters through traction.

[0003] The common defects of these structures are:

[0004] (1) When controlling the bend, when the catheter is pulled by the pull wire, in addition to the force applied to the distal end of the catheter, the main section is also partially bent under the action of the force attached to the pull wire, which is not conducive to the doctor's operation in actual surgery.

[0005] (2) When adjusting the bend, there is a deviation between the real-time bending direction of the catheter and the bending control direction, and precise bending cannot be performed. In order to solve the above defects, we proposed a multi-directional, multi-segment bending control catheter design. Summary of the Invention

[0006] The purpose of the present invention is to provide a multi-directional, multi-section controlled bending catheter design, which has a simulated spine component composed of metal parts, spring tubes and pull wires. By adjusting the number of simulated spine components and their distribution positions on the catheter, different bending effects of the catheter can be achieved by pulling the simulated spine components through the pull wires, thereby solving the problems raised in the above-mentioned background technology.

[0007] To achieve the above objectives, the present invention provides the following technical solutions: a multi-directional, multi-section bending control catheter design, comprising a catheter, a handle, and a simulated spine assembly, wherein the handle is fixedly mounted on the end of the catheter, and a bending control member is provided on the handle, and the bending control member is connected to the simulated spine assembly;

[0008] The catheter is divided into three sections: a distal bending section, a middle bendable section, and a main body section. The simulated spine components are distributed at different positions at the distal end of the catheter and on different sections of the catheter. When the bending control part pulls the simulated spine components, the catheter can be bent in multiple directions and in multiple sections.

[0009] Preferably, the distal curved section is distributed on the end of the catheter away from the handle, the middle bendable section is distributed on the middle part of the catheter, and the main body section is distributed on the end of the catheter close to the handle.

[0010] Preferably, the simulated spine component is embedded into the catheter wall by heat melting.

[0011] Preferably, the one or more simulated spine components are located on the distal bendable section, and the distal bending is controlled by the bending control member.

[0012] Preferably, the one or more simulated spine components are located on the middle bendable section, and the bending of the middle bendable section is controlled by the bending control member.

[0013] Preferably, one or more simulated spine components are distributed at angles or irregularly in the radial or axial direction of the catheter.

[0014] Preferably, the simulated spine assembly includes several metal parts, spring tubes and pull wires. By adjusting the number of simulated spine assemblies and their distribution positions on the catheter, and then pulling the simulated spine assemblies through the bending control piece, different bending effects of the catheter can be achieved.

[0015] Preferably, the shape of the metal piece is rhombus, and several metal pieces are connected in series end to end through spring tubes.

[0016] Preferably, the pull wire is located in the spring tube, and the end of the pull wire away from the handle is connected to the metal part, and the end of the pull wire close to the handle is connected to the bending control part.

[0017] Preferably, the bending control member is a sliding block, a through slot for the sliding block to slide is provided on the handle, and one end of the pull wire close to the handle is connected to the sliding block.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] First, by setting an anti-vertebral component at the distal bending section, when controlling the bending, the pull wire pulls the simulated vertebral component to bend, so that the catheter only bends at the simulated vertebral component and the main section is not affected.

[0020] Second, through the arrangement of metal parts and spring tubes, when controlling the bending, due to the limitations of the metal parts and spring tubes, when the pull wire pulls the catheter to bend, the actual bending direction of the catheter does not deviate from the bending control direction.

[0021] 3. By distributing the simulated spine components at different positions of the distal end of the catheter and on different sections of the catheter, the catheter can be bent in multiple directions and sections by pulling the simulated spine components through sliding blocks and pull wires.

[0022] 4. In summary, through the coordinated use of the above-mentioned related structures, the metal parts, spring tubes and pull wires constitute an artificial spine component. By adjusting the number of artificial spine components and their distribution positions on the catheter, and then pulling the artificial spine components by the pull wires, different bending effects of the catheter can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention;

[0024] Figure 2 is a side view of the present invention;

[0025] Figure 3 This is an enlarged view of the structure at point A of the present invention;

[0026] Figure 4 It is a cross-sectional view of BB' of the present invention;

[0027] Figure 5 It is a cross-sectional view of CC' of the present invention;

[0028] Figure 6 DD' is a cross-sectional view of the present invention;

[0029] Figure 7 is a cross-sectional view of the simulated spine assembly of the present invention;

[0030] Figure 8 is a perspective view of the simulated spine assembly of the present invention;

[0031] Figure 9 is a schematic diagram of the bending of the simulated spine assembly of the present invention;

[0032] Figure 10 This is a schematic diagram of the active bending principle of the metal member array in the XZ plane of the present invention;

[0033] Figure 11 This is a schematic diagram of the passive restricted bending principle of the metal component array in the XY plane of the present invention.

[0034] In the figure: 1. Distal bending section; 2. Middle bendable section; 3. Simulated spine component; 4. Main body section; 5. Handle; 6. Bending control piece; 7. Pull wire; 8. Metal part; 9. Spring tube; 10. Catheter. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] See also Figures 1 to 11 The present invention provides a technical solution: a multi-directional, multi-section bending control catheter design, including a catheter 10, a handle 5 and an artificial spine component 3, wherein the handle 5 is fixedly mounted on the end of the catheter 10, and a bending control member 6 is provided on the handle 5, and the bending control member 6 is connected to the artificial spine component 3;

[0037] The catheter 10 is divided into three sections: the distal bending section 1, the middle bendable section 2 and the main body section 4. The simulated spine components 3 are distributed at different positions of the distal end of the catheter 10 and on different sections of the catheter 10. When the bending control part 6 pulls the simulated spine components, the catheter 10 can be bent in multiple directions and in multiple sections.

[0038] like Figure 1 Furthermore, the distal bending section 1 is distributed on the end of the catheter 10 away from the handle 5, the middle bendable section 2 is distributed on the middle part of the catheter 10, and the main section 4 is distributed on the end of the catheter 10 close to the handle 5. By arranging the simulated spine component 3 on the distal bending section 1, when controlling the bending, the pull wire 7 pulls the simulated spine component 3 to bend, so that the catheter 10 only bends at the simulated spine component 3, and the main section 4 is not affected.

[0039] like Figure 6 and 7 Furthermore, the simulated spine component 3 is embedded into the wall of the catheter 10 by heat melting.

[0040] like Figure 1-4 Furthermore, one or more simulated spine components 3 are located on the distal bending section 1, and the distal bending is controlled by the bending control member 6.

[0041] like Figure 1-4 Furthermore, one or more simulated spine components 3 are located on the middle bendable section 2 , and the bending of the middle bendable section 2 is controlled by the bending control member 6 .

[0042] like Figure 5 Furthermore, one or more simulated spine components 3 are angled or irregularly distributed in the radial or axial direction of the catheter 10.

[0043] Through the arrangement of the metal piece 8 and the spring tube 9, when controlling the bend, due to the restrictions of the metal piece 8 and the spring tube 9, when the pull wire 7 pulls the catheter 10 to bend, the real-time bending direction of the catheter 10 does not deviate from the bending control direction.

[0044] like Figure 8 Furthermore, the simulated spine component 3 includes several metal parts 8, spring tubes 9 and pull wires 7. By adjusting the number of simulated spine components 3 and their distribution positions on the catheter 10, and then pulling the simulated spine components 3 through the bending control part 6, different bending effects of the catheter 10 can be achieved.

[0045] By distributing the simulated spine components 3 at different positions of the distal end of the catheter 10 and on different sections of the catheter 10, the catheter 10 can be bent in multiple directions and sections by pulling the simulated spine components 3 through the sliding block and the pull wire 7.

[0046] like Figure 8Furthermore, the shape of the metal piece 8 is a rhombus, and the metal piece 8 can also be other shapes, not limited to rhombus. Several metal pieces 8 are connected in series through the spring tube 9.

[0047] During the manufacturing process of the catheter 10, a structural component that simulates a "spine" is embedded into the catheter wall by hot melting. The "transverse process" of the "spine" is a metal component 8 with a certain shape. Adjacent metal components 8 are connected in series through spring tubes 9. The spring tubes 9 act as "vertebrae". Pull wires 7 are placed in the spring tubes 9. The metal components 8, spring tubes 9, and pull wires 7 constitute a "spine" component. By adjusting the number of simulated spine components 3 and their distribution positions on the catheter 10, different bending effects can be achieved by pulling the pull wires 7.

[0048] like Figure 6-7 Furthermore, the pull wire 7 is located in the spring tube 9, and the end of the pull wire 7 away from the handle 5 is connected to the metal part 8, and the end of the pull wire 7 close to the handle 5 is connected to the bending control part 6.

[0049] like Figure 4 Furthermore, the bending control member 6 is a sliding block, a through groove for the sliding block to slide is provided on the handle 5, and the end of the pull wire 7 close to the handle 5 is connected to the sliding block.

[0050] Through the coordinated use of the above-mentioned related structures, the metal part 8, the spring tube 9 and the pull wire 7 constitute an artificial spine component 3. By adjusting the number of artificial spine components 3 and their distribution positions on the catheter 10, and then pushing the sliding block to pull the pull wire 7, the artificial spine component 3 can be pulled to achieve different bending effects of the catheter 10.

[0051] When the pull wire 7 is pulled, the force is concentrated on the spring tube 9, the spring tube 9 contracts and bends, and the array composed of the metal parts 8 bends along the force direction, such as Figure 10 As shown, when subjected to force, the array of metal parts 8 actively bends in the XZ plane with a free bending angle, and the array of metal parts 8 is passively restricted in bending in the XY plane, and the degree of restriction is adjusted according to the spacing and shape of the metal parts 8.

[0052] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A multi-directional, multi-section bend-controlled catheter, characterized by: It includes a catheter, a handle and an artificial spine component. The handle is fixedly mounted on the end of the catheter. The handle is provided with a bending control piece, which is connected to the artificial spine component. The catheter is divided into three sections: a distal bending section, a middle bendable section, and a main section. The simulated spine components are distributed at different positions at the distal end of the catheter and at different sections of the catheter. When the bending control member pulls the simulated spine components, the catheter can be bent in multiple directions and sections. The simulated spine component is embedded into the catheter wall by heat melting; Multiple simulated spine components are located on the distal bending section, and the distal bending is controlled by the bending control member; Multiple simulated spine components are located on the middle bendable section, and the bending of the middle bendable section is controlled by the bending control member; The simulated spine assembly includes several metal parts, spring tubes and pull wires. By adjusting the number of simulated spine components and their distribution on the catheter, and then pulling the simulated spine components through the bending control piece, different bending effects of the catheter can be achieved. The metal parts are in the shape of a diamond, and a plurality of metal parts are connected in series end to end through spring tubes; The pull wire is located in the spring tube, and the end of the pull wire away from the handle is connected to the metal part, and the end of the pull wire close to the handle is connected to the bending control part; The bending control piece is a sliding block, a through slot for the sliding block to slide is provided on the handle, and one end of the pull wire close to the handle is connected to the sliding block.

2. The multi-directional, multi-section bend-controlled catheter according to claim 1, characterized in that: The distal bending section is distributed on an end of the catheter away from the handle, the middle bendable section is distributed on a middle portion of the catheter, and the main body section is distributed on an end of the catheter close to the handle.

3. The multi-directional, multi-section controlled bend catheter according to claim 1, characterized in that: The multiple simulated spine components are distributed at angles or irregularly in the radial or axial direction of the catheter.

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