Adjustable bent guide pipe structure

Abstract

The catheter structure comprises a catheter, at least one traction wire and an operating piece, the catheter comprises a far end and a near end, the traction wire comprises a first connecting part and a second connecting part, the first connecting part is arranged close to the far end and connected with the catheter, the second connecting part is arranged close to the near end, and the operating piece comprises a first operating part and a second operating part. The second operating part is movably arranged relative to the first operating part in the length direction of the traction wire, the second operating part is connected with the second connecting part of the traction wire, and the first operating part is configured to be capable of limiting the second operating part, so that the second operating part can drive the traction wire to move in the length direction; the far end of the catheter is bent under the driving of the traction wire, so that the catheter can conveniently enter another part from one part in the body of a patient, the risk that the catheter is bent or coiled in the body of the patient is reduced, the operation time can be shortened, the comfort of the patient is improved, and the intervention efficiency and safety of the catheter are improved.

Description

Technical Field

[0001] This application belongs to the technical field of medical devices, and particularly relates to an adjustable-bending catheter structure. Background Art

[0002] When an interventional medical catheter is inserted, it usually needs to pass through multiple parts of the patient's body to finally enter the part to be measured for detection. For example, when measuring hemodynamic parameters through an interventional medical catheter, the catheter needs to pass through the vena cava, right atrium, right ventricle, pulmonary artery, and finally reach the small blood vessels of the pulmonary artery. During this process, the catheter usually needs to bend at a certain angle to enter from one part to another. Especially when the catheter enters the pulmonary artery from the right ventricle, it needs to bend nearly 180°. If the patient has diseases such as low cardiac output, tricuspid regurgitation, ventricular stenosis, or tricuspid stenosis, it is very difficult for the catheter to bend at a large angle in the right ventricle and enter the pulmonary artery, resulting in the catheter bending or coiling in the right ventricle, seriously increasing the operation time and the patient's discomfort, and affecting the intervention efficiency and safety of the catheter. Summary of the Utility Model

[0003] An embodiment of this application provides an adjustable-bending catheter structure, which can improve the intervention efficiency and safety.

[0004] A first aspect of this application provides an adjustable-bending catheter structure, including a catheter, at least one traction wire, and an operating member. The catheter includes a distal end and a proximal end; the traction wire includes a first connection portion and a second connection portion. The first connection portion is disposed near the distal end and is connected to the catheter, and the second connection portion is disposed near the proximal end; the operating member includes a first operating portion and a second operating portion. The second operating portion is movably disposed relative to the first operating portion along the length direction of the traction wire. The second operating portion is connected to the second connection portion of the traction wire, and the first operating portion is configured to be able to limit the second operating portion.

[0005] In some embodiments, the first operating portion and the second operating portion are threadedly connected, and the first operating portion is connected to the catheter.

[0006] In some embodiments, the first operating portion includes an operating ring and two end plates. The two end plates are spaced apart along the length direction of the traction wire. The operating ring is clamped between the two end plates and is threadedly connected to the second operating portion. The second operating portion is movably disposed between the two end plates.

[0007] In some embodiments, the first operating portion further includes a guide shaft connected to the catheter. The two end plates are axially spaced apart on the guide shaft, and the operating ring and the second operating portion are respectively disposed around the guide shaft.

[0008] In some embodiments, a wire passing hole is axially formed in the guiding shaft, and an opening is radially formed in the guiding shaft. The opening is located between the two end plates and exposes a part of the wire passing hole. A part of the traction wire passes through the wire passing hole and the opening from inside the catheter, and the second connecting portion is connected to the second operating portion.

[0009] In some embodiments, the steerable catheter structure further includes a wire pulling loop. The wire pulling loop and a part of the traction wire are respectively located inside the catheter. The wire pulling loop is disposed near the distal end and extends circumferentially around the catheter. The first connecting portion is connected to the catheter through the wire pulling loop.

[0010] In some embodiments, a part of the traction wire is located inside the catheter, and the catheter is partially embedded in the first connecting portion.

[0011] In some embodiments, the first connecting portion is provided with at least one groove, and the catheter is embedded in the groove; and / or, the first connecting portion is provided with at least one through hole, and the catheter is embedded in the through hole.

[0012] In some embodiments, the catheter is a floating catheter, and / or the catheter includes a bent portion near the distal end and a non-bent portion near the proximal end. The hardness of the non-bent portion is greater than that of the bent portion.

[0013] In some embodiments, the steerable catheter structure further includes a balloon disposed at the distal end. A balloon inflation cavity is provided inside the catheter. The inlet of the balloon inflation cavity is located at the proximal end, and the second outlet of the balloon inflation cavity communicates with the balloon; and / or, the steerable catheter structure further includes a thermistor and a thermistor connector. A resistor receiving cavity is provided inside the catheter. The thermistor is disposed in the resistor receiving cavity and is near the distal end. The thermistor connector is electrically connected to the thermistor and is located at the proximal end.

[0014] An embodiment of the present application provides an adjustable-bending catheter structure, which includes a catheter, at least one traction wire, and an operating member. The catheter includes a distal end and a proximal end. The traction wire includes a first connection portion and a second connection portion. The first connection portion is disposed near the distal end and is connected to the catheter. The second connection portion is disposed near the proximal end. The operating member includes a first operating portion and a second operating portion. The second operating portion is movably disposed relative to the first operating portion along the length direction of the traction wire. The second operating portion is connected to the second connection portion of the traction wire. Thus, the traction wire can be driven to move along the length direction through the second operating portion, so that the distal end of the catheter is bent under the drive of the traction wire, which is convenient for the catheter to enter from one part of the patient's body into another part, reduces the risk of the catheter bending or knotting in the patient's body, can shorten the operation time, improve the comfort of the patient, and improve the intervention efficiency and safety of the catheter. Moreover, the first operating portion is configured to be able to limit the second operating portion. Therefore, when the second operating portion drives the traction wire to move to a preset position, the second operating portion is limited by the first operating portion, so that the second operating portion and the traction wire remain stationary at the preset position, and further the distal end of the catheter maintains the corresponding bending degree. Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required to be used in the embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0016] Figure 1 is a cross-sectional schematic view of an adjustable-bending catheter structure provided by some embodiments of the present application;

[0017] Figure 2 is a cross-sectional schematic view of the catheter bending in the adjustable-bending catheter structure provided by some embodiments of the present application;

[0018] Figure 3 is a partial enlarged view of the operating member in the adjustable-bending catheter structure provided by some embodiments of the present application;

[0019] Figure 4 is Figure 3 the cross-sectional view at A-A in

[0020] Figure 5 is a partial enlarged view of the distal end of the catheter in the adjustable-bending catheter structure provided by some embodiments of the present application;

[0021] Figure 6 is a partial enlarged view of the distal end of the catheter in the adjustable-bending catheter structure provided by some other embodiments of the present application;

[0022] Figure 7 is a partial enlarged view of the distal end of the catheter in the adjustable-bending catheter structure provided by some other embodiments of the present application;

[0023] Figure 8 Another cross-sectional schematic diagram of the adjustable bending catheter structure provided by some embodiments of the present application;

[0024] Figure 9 For Figure 8 The cross-sectional schematic diagram at A-A in

[0025] Marking name:

[0026] Catheter 10; distal end 11; proximal end 12; intervention cavity 13; first outlet 131; balloon inflation cavity 14; resistor accommodation cavity 15; bending portion 101; non-bending portion 102; traction wire 20; first connection portion 21; groove 211; through hole 212; second connection portion 22; traction wire main body 23; operating member 30; first operating portion 31; operating ring 311; end plate 312; guide shaft 313; wire passing hole 314; opening 315; second operating portion 32; wire pulling ring 40; joint 50; balloon inflation valve 60; thermistor 70; thermistor joint 80. Detailed implementation manners

[0027] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the objectives, technical solutions and advantages of the present application clearer and more understandable, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present application and are not configured to limit the present application. For those skilled in the art, the present application can be implemented without some of these specific details. The following description of the embodiments is only intended to provide a better understanding of the present application by showing examples of the present application.

[0028] It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, the elements defined by the statement "comprising..." do not exclude the presence of additional identical elements in the process, method, article or device comprising the said elements.

[0029] Figure 1 It is a cross-sectional schematic diagram of the adjustable bending catheter structure provided by some embodiments of the present application, Figure 2It is a schematic cross-sectional view when the catheter of the adjustable bending catheter structure provided by some embodiments of the present application is bent.

[0030] As Figure 1 and Figure 2 shown, a first aspect of the present application provides an adjustable bending catheter structure, including a catheter 10, at least one traction wire 20, and an operating member 30. The catheter 10 includes a distal end 11 and a proximal end 12. The traction wire 20 includes a first connection portion 21 and a second connection portion 22. The first connection portion 21 is disposed near the distal end 11 and is connected to the catheter 10. The second connection portion 22 is disposed near the proximal end 12. The operating member 30 includes a first operating portion 31 and a second operating portion 32. The second operating portion 32 is movably disposed relative to the first operating portion 31 along the length direction of the traction wire 20. The second operating portion 32 is connected to the second connection portion 22 of the traction wire 20. The first operating portion 31 is configured to be able to limit the second operating portion 32.

[0031] The catheter 10 includes a distal end 11 and a proximal end 12. It should be noted that the distal end 11 and the proximal end 12 are relative to the operator. The distal end 11 refers to the end of the catheter 10 away from the operator, which usually intervenes in the patient's body. The proximal end 12 refers to the end of the catheter 10 close to the operator, which is usually located outside the patient's body. The catheter 10 can intervene in the patient's body from the distal end 11. After the catheter 10 is inserted, the proximal end 12 of the catheter 10 can be located outside the patient's body. The traction wire 20 can be located inside the catheter 10, which can not only reduce the influence of the external environment on the traction wire 20, but also improve the compactness between the traction wire 20 and the catheter 10, reduce the overall radial dimension, and reduce the intervention difficulty. The traction wire 20 includes a first connection portion 21 and a second connection portion 22. And the traction wire 20 can also include a traction wire main body 23, and the traction wire main body 23 is connected between the first connection portion 21 and the second connection portion 22. For example, both ends of the traction wire main body 23 are connected to the first connection portion 21 and the second connection portion 22 respectively. The first connection portion 21 is disposed near the distal end 11, that is, the first connection portion 21 is connected to the catheter 10 at the distal end 11 of the catheter 10. The first connection portion 21 can be connected to the catheter 10 in various ways. For example, the first connection portion 21 can be connected to the catheter 10 through a wire loop 40 (see Figure 5) and other connection structures are indirectly connected to the catheter 10, and the first connection portion 21 can also be directly clamped to the catheter 10. The second connection portion 22 is arranged near the proximal end 12, and the second operation portion 32 of the operating member 30 is connected to the second connection portion 22, that is, the operating member 30 is arranged near the proximal end 12 of the catheter 10. When the catheter 10 is inserted into the patient's body, the operating member 30 can be located outside the patient's body, so as to facilitate the operation of the operator. It should be noted that the traction wire 20 can be made of a metal material. For example, steel can be used as the material of the traction wire 20. Of course, the material of the traction wire 20 can also be other plastic materials or brittle materials, as long as the traction wire 20 is difficult to deform after being pulled by hand.

[0032] The second operation portion 32 is movably arranged relative to the first operation portion 31 along the length direction of the traction wire 20. The length direction of the traction wire 20 is the direction extending along the axis of the traction wire 20. Therefore, the traction wire 20 can be driven to move along the length direction through the second operation portion 32, so that the distal end 11 of the catheter 10 is bent under the drive of the traction wire 20, so as to adjust the orientation and position of the distal end 11 of the catheter 10, so as to facilitate the catheter 10 to enter from one part of the patient's body into another part, reduce the risk of the catheter 10 bending or knotting in the patient's body, shorten the operation time, improve the comfort of the patient, and improve the intervention efficiency and safety of the catheter 10. At the same time, the first operation portion 31 is configured to be able to limit the second operation portion 32 to limit the movement of the second operation portion 32 and the traction wire 20 along the length direction of the traction wire 20. Therefore, when the second operation portion 32 drives the traction wire 20 to move to a preset position, the second operation portion 32 is limited by the first operation portion 31, so that the second operation portion 32 and the traction wire 20 remain at the preset position without moving, and further the distal end 11 of the catheter 10 maintains the corresponding bending degree.

[0033] It should be noted that the first operation portion 31 can limit the second operation portion 32 in any way. For example, the operating member 30 can be a cylinder, the first operation portion 31 can be the cylinder body of the cylinder, and the second operation portion 32 can be the piston rod of the cylinder. Or, the operating member 30 can also be a motor or a lead screw, as long as the second operation portion 32 can move relative to the first operation portion 31 along the length direction of the traction wire 20, and the first operation portion 31 can limit the second operation portion 32 along the length direction of the traction wire 20. The specific structures and connection manners of the first operation portion 31 and the second operation portion 32 are not limited in this embodiment.

[0034] It should be noted that when the traction wire 20 moves toward the side close to the proximal end 12 under the drive of the second operation portion 32, the traction wire 20 can drive the distal end 11 of the catheter 10 to bend. When the distal end 11 of the catheter 10 needs to be reset, the traction wire 20 and the second operation portion 32 move toward the side close to the distal end 11 of the catheter 10 respectively to achieve the reset.

[0035] It can be understood that the position where the first connecting portion 21 of the traction wire 20 is connected to the catheter 10 is related to the direction in which the catheter 10 is to be bent. In this application, the bending direction of the catheter 10 is controlled by designing the position where the first connecting portion 21 is connected to the catheter 10. For example, if the catheter 10 includes a first side, a second side, a third side, and a fourth side in the circumferential direction, when the first connecting portion 21 of the traction wire 20 is connected to the first side of the catheter 10, the catheter 10 can be driven to bend toward the first side when the traction wire 20 moves along the length direction toward the side close to the proximal end 12. If the first connecting portion 21 of the traction wire 20 is connected to the second side of the catheter 10, the catheter 10 can be driven to bend toward the second side when the traction wire 20 moves along the length direction toward the side close to the proximal end 12.

[0036] In some alternative embodiments, the number of the traction wires 20 and the operating members 30 can be multiple respectively. The second operating portions 32 of the multiple operating members 30 are connected to the second connecting portions 22 of the multiple traction wires 20 one by one. The first connecting portions 21 of the multiple traction wires 20 are arranged at intervals along the outer periphery of the catheter 10 and are connected to the catheter 10. Therefore, the catheter 10 can be driven to bend in any one of multiple directions by the multiple operating members 30 and the multiple traction wires 20, thereby improving the flexibility of the bending of the catheter 10.

[0037] It should be noted that when the number of the traction wires 20 and the operating members 30 is multiple, the bending direction of the distal end 11 of the catheter 10 can be determined by one of the multiple traction wires 20, or can also be jointly determined by the multiple traction wires 20. For example, when the traction wires 20 are respectively arranged on the first side and the second side of the catheter 10 in the circumferential direction, the distal end 11 of the catheter 10 can be bent in a direction between the first side and the second side by the traction wire 20 on the first side and the traction wire 20 on the second side.

[0038] It should be noted that the multiple directions refer to the directions where the first connecting portions 21 of the multiple traction wires 20 are located. For example, when the number of the traction wires 20 is two, and the first connecting portions 21 of the two traction wires 20 are connected to both sides of the catheter 10 in the width direction, the distal end 11 of the catheter 10 can be driven to bend in any one of the two sides by the two traction wires 20.

[0039] Optionally, the second operating portion 32 can move relative to the first operating portion 31 in a manually adjustable manner to save costs. Alternatively, the second operating portion 32 can also move relative to the first operating portion 31 in an electrically controlled manner. For example, the second operating portion 32 can be connected to the first operating portion 31 through electrically controlled components such as air cylinders, hydraulic cylinders, and screw mechanisms, so that the second operating portion 32 can move relative to the first operating portion 31 under the drive of the foregoing electrically controlled components, so as to reduce the operation difficulty and improve the operation accuracy.

[0040] In some embodiments, the first operating portion 31 and the second operating portion 32 are threadedly connected, and the first operating portion 31 is connected to the catheter 10.

[0041] Specifically, one of the first operating portion 31 and the second operating portion 32 is provided with an internal thread, and the other is provided with an external thread that meshes therewith, so as to realize the connection between the two through the meshing of the internal and external threads. The first operating portion 31 can be directly connected to the catheter 10 or indirectly connected to the catheter 10 through other structures, and this embodiment does not limit this.

[0042] In these embodiments, the first operating portion 31 and the second operating portion 32 are threadedly connected. Therefore, by rotating the first operating portion 31 or the second operating portion 32, the second operating portion 32 can be moved along the length direction of the traction wire 20, so as to drive the traction wire 20 to move along the length direction. The operation is simple and convenient, and the transmission stability between the first operating portion 31 and the second operating portion 32 can be improved. At the same time, in this embodiment, when the second operating portion 32 drives the traction wire 20 to move to a preset position, the first operating portion 31 can also limit the second operating portion 32 along the length direction of the traction wire 20 through the meshing of the threads, so that the second operating portion 32 and the traction wire 20 remain stationary at this preset position, and further make the distal end 11 of the catheter 10 maintain the corresponding bending degree.

[0043] In addition, in this embodiment, the connection between the first operating portion 31 and the catheter 10 can also prevent the entire operating member 30 from being displaced accidentally, which may cause the traction wire 20 to be driven accidentally, thereby reducing the risk of accidental bending of the catheter 10 and improving the safety of the catheter 10 when inserted into the patient's body.

[0044] In some other alternative embodiments, the second operating portion 32 can be slidably arranged relative to the first operating portion 31, and the first operating portion 31 and the second operating portion 32 can be snap-connected to each other. Specifically, the first operating portion 31 is provided with a plurality of first snap-connection portions, and the plurality of first snap-connection portions are arranged at intervals along the length direction of the traction wire 20. The second operating portion 32 is provided with a second snap-connection portion. When the second operating portion 32 drives the traction wire 20 to move to a preset position along the length direction, the second snap-connection portion is snap-connected to the corresponding first snap-connection portion to limit the second operating portion 32 through the first snap-connection portion, so that the second operating portion 32 and the traction wire 20 remain stationary at this preset position, and further make the distal end 11 of the catheter 10 maintain the corresponding bending degree.

[0045] Figure 3 It is a partial enlarged view of the operating member in the adjustable-bending catheter structure provided by some embodiments of the present application.

[0046] Such as Figure 3As shown, in some embodiments, the first operating part 31 includes an operating ring 311 and two end plates 312. The two end plates 312 are spaced apart along the length direction of the traction wire 20. The operating ring 311 is clamped between the two end plates 312 and is threadedly connected to the second operating part 32. The second operating part 32 is movably arranged between the two end plates 312.

[0047] Specifically, the operating ring 311 is annular, and is provided with a center hole that penetrates along the length direction of the traction wire 20. The operating ring 311 may include an inner contour surface facing the center hole and an outer contour surface away from the center hole, wherein an inner thread may be formed at the contour surface, and the second operating portion 32 may be located in the center hole, and the second operating portion 32 may be formed with an outer thread, so that the threaded connection between the operating ring 311 and the second operating portion 32 may be achieved through the engagement of the inner and outer threads, and the structure is simple and the transmission is stable. In addition, since the second operating portion 32 is located in the center hole of the operating ring 311, that is, the operating ring 311 is arranged around the outer peripheral side of the second operating portion 32, the operator can drive the second operating portion 32 to move by rotating the operating ring 311, so that the operation is simple and convenient.

[0048] The two end plates 312 are arranged at intervals along the length direction of the traction wire 20. The distance between the two end plates 312 can be greater than the size of the second operating part 32 along the length direction of the traction wire 20, and is roughly equal to the size of the first operating part 31 along the length direction of the traction wire 20. Therefore, when the operating ring 311 is clamped between the two end plates 312, the second operating part 32 can be moved along the length direction of the traction wire 20 between the two end plates 312 by rotating the operating ring 311, so that the operating ring 311 can be limited along the length direction of the traction wire 20 by the two end plates 312 to prevent the operating ring 311 from moving during the operation of the operator, which is not conducive to the operation or affects the operation accuracy. At the same time, the second operating part 32 can also be limited along the length direction of the traction wire 20 by the two end plates 312 to prevent the second operating part 32 from causing the traction wire 20 to move excessively and cause the distal end 11 of the catheter 10 to be excessively bent.

[0049] Figure 4 for Figure 3 Cross-section view at AA.

[0050] See also Figure 3 and Figure 4 In some embodiments, the first operating part 31 also includes a guide shaft 313 connected to the catheter 10, two end plates 312 are arranged on the guide shaft 313 along the axial direction of the guide shaft 313, and the operating ring 311 and the second operating part 32 are respectively arranged around the guide shaft 313.

[0051] The extending direction of the guiding shaft 313 is parallel to the length of the traction wire 20, that is, the axial direction of the guiding shaft 313 is parallel to the length direction of the traction wire 20. The guiding shaft 313 can be directly connected to the catheter 10 or indirectly connected to the catheter 10 in other ways. The guiding shaft 313 and the catheter 10 can be connected by means of adhesion, clamping, etc.; alternatively, the guiding shaft 313 can also be integrally formed with the catheter 10 during the manufacturing process of the catheter 10. For example, when the catheter 10 is injection-molded, the guiding shaft 313 can be inserted into the injection material during the injection molding of the catheter 10, and the connection with the catheter 10 is achieved after the injection material is cured to form the catheter 10. The two end plates 312 are arranged on the guiding shaft 313 at intervals along the axial direction of the guiding shaft 313. Among them, the end plate 312 and the guiding shaft 313 can be an integrally formed structure, or the end plate 312 can also be connected by adhesion or other mechanical connection methods, which is not limited in this embodiment. The operation ring 311 and the second operation part 32 are respectively arranged around the outer peripheral side of the guiding shaft 313, and there is a gap between the operation ring 311 and the guiding shaft 313. The second operation part 32 is located in the gap between the operation ring 311 and the guiding shaft 313. Thus, the guiding shaft 313 can guide the second operation part 32 during the movement of the second operation part 32 along the length direction of the traction wire 20, improve the stability when the second operation part 32 drives the traction wire 20 to move, enable the distal end 11 of the catheter 10 to be bent stably, and enhance the safety of the catheter 10 when inserted into the patient's body.

[0052] Please continue to refer to Figure 3 and Figure 4 , in some embodiments, the guiding shaft 313 is axially provided with a wire passing hole 314 along its own axis, and the guiding shaft 313 is radially provided with an opening 315 along its own axis. The opening 315 is located between the two end plates 312 and exposes a part of the wire passing hole 314. Part of the traction wire 20 passes through the wire passing hole 314 and the opening 315 from the inside of the catheter 10, and the second connecting part 22 is connected to the second operation part 32.

[0053] The length direction of the wire passing hole 314 is parallel to the axial direction of the guide shaft 313. The wire passing hole 314 is formed by the guide shaft 313 opening along its own axial direction. The guide shaft 313 is connected to the catheter 10. Therefore, the traction wire 20 can directly extend from the inside of the catheter 10 into the wire passing hole 314 of the guide shaft 313, which can reduce the risk of the traction wire 20 being exposed to the external environment. That is, the catheter 10 and the guide shaft 313 can protect the traction wire 20 and improve its service life. The guide shaft 313 is provided with an opening 315 for exposing the wire passing hole 314 along its own radial direction. The opening 315 is located between the two end plates 312. Therefore, the traction wire 20 located in the wire passing hole 314 can be connected to the second operating part 32 surrounding the guide shaft 313 through the opening 315. When the second operating part 32 drives the traction wire 20 to move, the wire passing hole 314 can limit and guide the traction wire 20 to a certain extent, improving the stability of the traction wire 20 during the moving process.

[0054] Figure 5 It is a partial enlarged view of the distal end of the catheter in the adjustable bending catheter structure provided by some embodiments of the present application.

[0055] As Figure 5 shown, in some embodiments, the adjustable bending catheter structure further includes a wire pulling loop 40. The wire pulling loop 40 and a part of the traction wire 20 are respectively located inside the catheter 10. The wire pulling loop 40 is arranged close to the distal end 11 and extends circumferentially along the catheter 10. The first connecting part 21 is connected to the catheter 10 through the wire pulling loop 40.

[0056] In these embodiments, the wire pulling loop 40 is arranged inside the catheter 10 so that the wire pulling loop 40 is arranged close to the distal end 11, thereby connecting the traction wire 20 and the catheter 10 through the wire pulling loop 40, which can ensure the reliability of the connection between the traction wire 20 and the catheter 10. At the same time, since the wire pulling loop 40 is annular, it can also avoid interference with other structures inside the catheter 10.

[0057] In some embodiments, a part of the traction wire 20 is located inside the catheter 10, and the catheter 10 is partially embedded in the first connecting part 21. Specifically, the catheter 10 is partially embedded in the first connecting part 21 along the width direction of the traction wire 20, which is equivalent to making the catheter 10 and the first connecting part 21 be clamped along the length direction of the traction wire 20. When the traction wire 20 moves along the length direction, it can drive the catheter 10 to bend. The structure is simple and the transmission is stable. And, compared with connecting the traction wire 20 and the catheter 10 through structures such as the wire pulling loop 40, since there is no need to set the wire pulling loop 40 inside the catheter 10, the process steps can be simplified, and at the same time, the radial size of the catheter 10 caused by structures such as the wire pulling loop 40 can be avoided.

[0058] Figure 6 It is a partial enlarged view of the distal end of the catheter in the adjustable bending catheter structure provided by other embodiments of the present application.

[0059] Please refer to Figure 6 , in some embodiments, at least one groove 211 is formed in the first connecting portion 21, and the catheter 10 is embedded in the groove 211.

[0060] The number of the grooves 211 may be one or more. Preferably, the first connecting portion 21 is provided with a plurality of grooves 211. The plurality of grooves 211 may be arranged at intervals in the circumferential direction and / or the axial direction of the traction wire 20, which can increase the contact area between the catheter 10 and the first connecting portion 21 and improve the reliability of the connection between the two. Moreover, the shape of the groove 211 can be reasonably set in practical applications, and this embodiment does not limit this.

[0061] In these embodiments, the groove 211 may be formed by the first connecting portion 21 opening along the width direction of the traction wire 20. When the catheter 10 is embedded in the groove 211 along the width direction of the traction wire 20, the catheter 10 and the first connecting portion 21 are equivalent to being clamped with each other along the length direction of the traction wire 20. When the traction wire 20 moves along the length direction, it can drive the catheter 10 to bend. The structure is simple and the transmission is stable. Moreover, compared with connecting the traction wire 20 and the catheter 10 through structures such as the wire pulling loop 40, since the wire pulling loop 40 does not need to be arranged inside the catheter 10, the process steps can be simplified, and at the same time, the radial dimension increase of the catheter 10 caused by structures such as the wire pulling loop 40 can be avoided.

[0062] Figure 7 It is a partial enlarged view of the distal end of the catheter in the adjustable bending catheter structure provided by some other embodiments of the present application.

[0063] Please refer to Figure 7 , and / or, at least one through hole 212 is formed in the first connecting portion 21, and the catheter 10 is embedded in the through hole 212.

[0064] The width direction of the traction wire 20, which is also the radial direction of the traction wire 20, is perpendicular to the length direction of the traction wire 20, that is, perpendicular to the axial direction of the traction wire 20. The number of the through holes 212 can be one or multiple. Preferably, a plurality of through holes 212 are provided in the first connecting portion 21, and the plurality of through holes 212 are arranged at intervals along the length direction of the traction wire 20, so that the catheter 10 is embedded in the plurality of through holes 212, thereby improving the connection reliability between the catheter 10 and the first connecting portion 21. It should be noted that when the first connecting portion 21 is provided with the through holes 212, the first connecting portion 21 may include two first sub-portions and two second sub-portions. The two first sub-portions are respectively located on both sides of the through hole 212 along the length direction of the traction wire 20, and one of the first sub-portions is connected to the traction wire main body 23. The two second sub-portions are respectively located on both sides of the through hole 212 along the width direction of the traction wire 20. The second sub-portions are located between the two first sub-portions. The two first sub-portions and the two second sub-portions jointly define the through hole 212, and the two first sub-portions are connected to each other through the two second sub-portions to form the first connecting portion 21.

[0065] In these embodiments, the through holes 212 may be formed by the first connecting portion 21 opening along the width direction of the traction wire 20, that is, the length direction of the through holes 212 is parallel to the width direction of the traction wire 20 and perpendicular to the length direction of the traction wire 20, so that the catheter 10 can be embedded in the through holes 212 along the width direction of the traction wire 20, and the catheter 10 and the first connecting portion 21 are equivalent to being clamped with each other along the length direction of the traction wire 20. When the traction wire 20 moves along the length direction, it can drive the catheter 10 to bend, with a simple structure and stable transmission. Moreover, compared with connecting the traction wire 20 and the catheter 10 through structures such as the wire pulling loop 40, since there is no need to provide a wire pulling loop 40 inside the catheter 10, the process steps can be simplified, and at the same time, the increase in the size of the catheter 10 caused by structures such as the wire pulling loop 40 can be avoided.

[0066] It should be noted that during the assembly process of the traction wire 20 and the catheter 10, the traction wire 20 can be inserted into the catheter 10 so that the first connecting portion 21 with the groove 211 or the through hole 212 is close to the distal end 11. Subsequently, through the heat shrinkage process during the forming process of the catheter 10, the catheter 10 can be embedded into the groove 211 or the through hole 212 of the first connecting portion 21 without additional processing, which can simplify the process steps and save production costs.

[0067] In some embodiments, the catheter 10 is a floating catheter, which is used to detect hemodynamic parameters such as the cardiac output, central venous pressure, right atrial pressure, pulmonary artery pressure, and pulmonary artery wedge pressure of a patient to provide accurate data for treating the patient.

[0068] It should be noted that when the catheter 10 is a floating catheter, during the catheterization process, the catheter 10 needs to pass through the vena cava, right atrium, right ventricle, pulmonary artery, and finally reach the small blood vessels of the pulmonary artery. During this process, the catheter 10 usually needs to be bent at a certain angle to enter from one part to another part. Especially when the catheter 10 enters the pulmonary artery from the right ventricle, it needs to be bent nearly 180°. Therefore, in the embodiments of the present application, by setting the first connection portion 21 of the traction wire 20 close to the distal end 11 of the catheter 10 and connecting it to the catheter 10, its second connection portion 22 is close to the proximal end 12 of the catheter 10, and the second operation portion 32 of the operating member 30 is movably arranged along the length direction of the traction wire 20 relative to the first operation portion 31. The second operation portion 32 is connected to the second connection portion 22 of the traction wire 20. Thus, the traction wire 20 can be driven to move along the length direction through the second operation portion 32, so that the distal end 11 of the catheter 10 is bent under the drive of the traction wire 20, facilitating the catheter 10 to enter from one part of the patient's body to another part. For example, when the catheter 10 is in the right ventricle, the distal end 11 of the catheter 10 is driven by the traction wire 20 to be bent nearly 180°, so that the distal end 11 of the catheter 10 can enter the pulmonary artery from the right ventricle, thereby reducing the risk of the catheter 10 being bent or coiled in the patient's body, shortening the operation time, improving the comfort of the patient, and improving the intervention efficiency and safety of the catheter 10.

[0069] Please continue to refer to Figure 2 , and / or, the catheter 10 includes a bent portion 101 near the distal end 11 and a non-bent portion 102 near the proximal end 12. The hardness of the non-bent portion 102 is greater than that of the bent portion 101, so as to facilitate the distal end 11 of the catheter 10 to be bent under the drive of the traction wire 20. Moreover, setting the hardness of the non-bent portion 102 to be greater than that of the bent portion 101 can also prevent the catheter 10 from being bent into a snake shape, a wave shape, etc. under the drive of the traction wire 20.

[0070] In some alternative embodiments, the non-bent portion 102 includes a first region and a second region located between the first region and the bent portion 101. The second region is connected to the bent portion 101, and the hardness of the first region is greater than that of the second region to further prevent the catheter 10 from being bent into a snake shape, a wave shape, etc. under the drive of the traction wire 20.

[0071] Furthermore, the hardness HR1 of the first region satisfies: 60D ≤ HR1 ≤ 75D, the hardness HR2 of the second region satisfies: 50D ≤ HR2 ≤ 65D, and the hardness HR3 of the bent portion satisfies: 25D ≤ HR3 ≤ 50D. Thus, by reasonably setting the hardness of each part of the catheter 10, the performance of the catheter 10 is improved. It should be clear that the hardness D in the embodiments of the present application is the Shore hardness.

[0072] In some alternative embodiments, the material of the catheter 10 may include polymer materials. For example, the material of the catheter 10 may include at least one of polyether block polyamide, polyvinyl chloride, polyurethane, polyethylene, and polypropylene, so that the catheter 10 has good performance.

[0073] It should be noted that at least a part of the catheter 10 can be formed by processes such as extrusion process and heat shrinkage process. For example, the catheter 10 may include a tube body and a catheter joint connecting the tube body. The tube body can be formed by processes such as extrusion process and heat shrinkage process, and the catheter joint can be made by injection molding or the like, and can be connected to the tube body during the injection molding process.

[0074] It should be noted that when the catheter 10 includes a tube body and a catheter joint, the traction wire 20 can extend from the tube body into the catheter joint and then extend from the catheter joint into the wire passing hole 314 of the guide shaft 313. At this time, the operating member 30 can be connected to the catheter joint.

[0075] Figure 8 It is a schematic cross-sectional view of an adjustable bending catheter structure provided by some embodiments of the present application. Figure 9 is Figure 8 the schematic cross-sectional view at A-A in

[0076] Please refer to Figure 8 and Figure 9 , in some embodiments, at least one intervention cavity 13 is provided in the catheter 10. The entrance of the intervention cavity 13 is located at the proximal end 12, and the first outlet 131 of the intervention cavity 13 is arranged close to the distal end 11 to allow a guide wire to pass through the intervention cavity 13, or to perform functions such as infusion, pressure measurement, blood aspiration, and measurement of cold carbon monoxide injection solution.

[0077] In some alternative embodiments, the number of the intervention cavities 13 can be two. The first outlets 131 of the two intervention cavities 13 are arranged at intervals along the length direction of the traction wire 20. Among them, the intervention cavity 13 with the first outlet 131 close to the distal end 11 can allow a guide wire to pass through, or to perform functions such as blood aspiration, infusion, and pressure measurement. The intervention cavity 13 with the first outlet 131 far from the distal end 11 can be used for functions such as blood aspiration, infusion, pressure measurement, and measurement of cold carbon monoxide injection solution. Of course, the number of the intervention cavities 13 can also be multiple, and this embodiment does not limit this.

[0078] In some alternative embodiments, the adjustable bending catheter structure may further include two Luer connectors 50, and the two Luer connectors 50 are respectively communicated with the entrances of the two intervention cavities 13 to facilitate liquid injection into the intervention cavities 13.

[0079] Please continue to refer to Figure 8 and Figure 9, in some embodiments, the steerable catheter structure further includes a balloon disposed at the distal end 11. A balloon inflation lumen 14 is provided inside the catheter 10. The inlet of the balloon inflation lumen 14 is located at the proximal end 12, and the second outlet of the balloon inflation lumen 14 communicates with the balloon.

[0080] In this embodiment, the catheter 10 can be a floating catheter, and its distal end 11 is provided with a balloon. By providing a balloon inflation lumen 14 inside the catheter 10, the balloon can be inflated through the balloon inflation lumen 14, so that the balloon can be pushed by the blood flow in the blood vessel, facilitating the catheter 10 to enter from one part of the patient's body to another part. Moreover, during the catheterization process, since the inflated balloon can keep the distal end 11 of the catheter 10 below the surface of the balloon, the force acting on the distal end 11 of the catheter 10 will be dispersed on the surface of the inflated balloon, thereby reducing the irritation to the endocardium. At the same time, the balloon can also help to position the catheter 10 in the blood vessel. When the balloon is inflated, it can float along the blood flow and detect the pressures of each ventricle and the pulmonary circulation of the patient through a specific blood vessel path. In addition, the balloon can also be used to calculate the cardiac output, evaluate the patient's cardiovascular function, etc., to expand the application scope of the steerable catheter structure.

[0081] It should be noted that the balloon inflation lumen 14 is located inside the catheter 10, and the balloon can be connected to the distal end 11 of the catheter 10 by means of adhesion, heat shrinkage, hot melting, welding, etc. to communicate with the balloon inflation lumen 14.

[0082] In some alternative embodiments, the steerable catheter structure may further include a balloon inflation valve 60 to control the gas flow rate in the balloon inflation lumen 14. The balloon inflation valve 60 can be a valve of types such as a two-way valve, a three-way valve, a spring-type air valve, a silicone-type air valve, etc.

[0083] Please continue to refer to Figure 8 and Figure 9 , in some embodiments, the steerable catheter structure further includes a thermistor 70 and a thermistor connector 80. A resistor accommodation lumen 15 is provided inside the catheter 10. The thermistor 70 is disposed in the resistor accommodation lumen 15 and is disposed close to the distal end 11. The thermistor connector 80 is electrically connected to the thermistor 70 and is located at the proximal end 12.

[0084] In these embodiments, the catheter 10 can be a floating catheter, and a resistor accommodation lumen 15 is provided inside it. By disposing the thermistor 70 in the resistor accommodation lumen 15 inside the catheter 10 so that the thermistor 70 is disposed close to the distal end 11, the temperature of the distal end 11 and its vicinity of the catheter 10 can be monitored by the thermistor 70, which helps to calculate parameters such as cardiac output. The thermistor connector 80 is connected to the thermistor 70 and is located at the proximal end 12, then the thermistor connector 80 can be electrically connected to a patch cord or other external devices for data transmission.

[0085] It should be noted that in the present application, the thermistor connector 80, the balloon inflation valve 60, and the luer connector 50 can be respectively connected to the corresponding chambers in the catheter 10 through pipelines. When the catheter 10 includes a tube body and a catheter connector connecting the tube body, each pipeline can be connected to the catheter connector by means such as bonding, so as to communicate with the corresponding chamber.

[0086] As described above, the above is only the specific implementation manner of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the above-described systems, modules, and units can refer to the corresponding processes in the foregoing method embodiments, and will not be elaborated herein. It should be understood that the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered within the protection scope of the present application.

Claims

1. An adjustable curved conduit structure, characterized in that: include: a catheter, including distal and proximal ends; at least one traction wire, the traction wire comprising a first connection portion and a second connection portion, the first connection portion being disposed near the distal end and connected to the catheter, and the second connection portion being disposed near the proximal end; The operating member includes a first operating part and a second operating part, wherein the second operating part is movably arranged relative to the first operating part along the length direction of the traction wire, the second operating part is connected to the second connecting part of the traction wire, and the first operating part is configured to limit the second operating part.

2. The adjustable curved conduit structure according to claim 1, characterized in that: The first operating part and the second operating part are threadedly connected, and the first operating part is connected to the catheter.

3. The adjustable curved conduit structure according to claim 1, characterized in that: The first operating part includes an operating ring and two end plates, the two end plates are spaced apart along the length direction of the traction wire, the operating ring is clamped between the two end plates and is threadedly connected to the second operating part, and the second operating part is movably arranged between the two end plates.

4. The adjustable curved conduit structure according to claim 3, characterized in that: The first operating part further comprises a guide shaft connected to the catheter, the two end plates are arranged on the guide shaft at intervals along the axial direction of the guide shaft, and the operating ring and the second operating part are respectively arranged around the guide shaft.

5. The adjustable curved conduit structure according to claim 4, characterized in that: The guide shaft has a wire passing hole along its axial direction and an opening along its radial direction, the opening is located between the two end plates and exposes part of the wire passing hole, part of the traction wire passes through the wire passing hole and the opening from the inside of the catheter, and the second connecting part is connected to the second operating part.

6. The adjustable curved conduit structure according to claim 1, characterized in that: The adjustable bend catheter structure also includes a pull wire ring, which and part of the traction wire are respectively located in the catheter. The pull wire ring is arranged close to the distal end and extends around the circumference of the catheter. The first connecting part is connected to the catheter through the pull wire ring.

7. The adjustable curved conduit structure according to claim 1, characterized in that: Part of the traction wire is located in the catheter, and the catheter is partially embedded in the first connecting part.

8. The adjustable curved conduit structure according to claim 7, characterized in that: The first connecting portion is provided with at least one groove, and the conduit is embedded in the groove; and / or, The first connecting portion is provided with at least one through hole, and the conduit is embedded in the through hole.

9. The adjustable curved conduit structure according to any one of claims 1 to 8, characterized in that: The catheter is a floating catheter, and / or The catheter includes a bending portion close to the distal end and a non-bending portion close to the proximal end, and the hardness of the non-bending portion is greater than the hardness of the bending portion.

10. The adjustable curved conduit structure according to any one of claims 1 to 8, characterized in that: The adjustable bend catheter structure further includes a balloon disposed at the distal end, a balloon inflation cavity is disposed in the catheter, an inlet of the balloon inflation cavity is located at the proximal end, and a second outlet of the balloon inflation cavity is connected to the balloon; and / or, The adjustable curved conduit structure also includes a thermistor and a thermistor connector. A resistor accommodating cavity is provided in the conduit. The thermistor is arranged in the resistor accommodating cavity and is arranged close to the distal end. The thermistor connector is electrically connected to the thermistor and is located at the proximal end.

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