CN209884984U

CN209884984U - Bending-adjustable handle and bending-adjustable catheter

Info

Publication number: CN209884984U
Application number: CN201821787398.8U
Authority: CN
Inventors: 张庭超; 蒋权杰; 罗建方; 黄桥
Original assignee: Hangzhou Strong Medical Technology Co Ltd
Current assignee: Hangzhou Strong Medical Technology Co Ltd
Priority date: 2018-10-31
Filing date: 2018-10-31
Publication date: 2020-01-03
Anticipated expiration: 2028-10-31

Abstract

The utility model provides a bend-adjusting handle and a bend-adjusting catheter comprising the same. The adjustable bending catheter comprises a catheter body, a bending adjusting handle and at least two traction pieces, wherein the far end of the catheter body is provided with at least two adjustable bending sections arranged at intervals, the bending adjusting handle comprises a driving mechanism and a control mechanism connected with the driving mechanism, each traction piece is connected with one adjustable bending section at the far end, and the near end is connected with a sub-sliding piece of the driving mechanism in the bending adjusting handle. The adjustable bending handle can be controlled to simultaneously drive all the adjustable bending sections to be bent to form different composite bending shapes or independently drive one adjustable bending section to be bent to finely adjust the bending shape of the corresponding adjustable bending section, so that operations with different requirements on the far end shape of the adjustable bending catheter, such as left coronary intervention operation and right coronary intervention operation, can be implemented by using the same adjustable bending catheter, and the individual difference of the physiological anatomical structures of the lumens of different patients can be adapted.

Description

Bending-adjustable handle and bending-adjustable catheter

Technical Field

The utility model relates to the field of medical equipment, especially, relate to a bend-adjustable handle and bend-adjustable pipe.

Background

Most of the coronary guiding catheters or angiography catheters widely used at present are pre-shaped catheters, and the distal end of the catheter at least comprises two pre-shaped bending sections. However, the conventional pre-shaped catheter, such as the Judkins Left catheter shown in fig. 1a, can only be applied to Left coronary intervention operation, and the Judkins Right shown in fig. 1b can only be applied to Right coronary intervention operation, so that the pre-shaped catheter must be replaced for the Left coronary intervention operation and the Right coronary intervention operation, and two pre-shaped catheters enter the Left coronary intervention and the Right coronary intervention respectively through two punctures, which results in long time consumption and complex operation. In addition, in the actual clinical use process, individual differences of human body lumen anatomical structures are often encountered, and even the pre-shaped catheter is difficult to adapt to the left coronary artery or the right coronary artery of different human bodies. In order to prevent such problems during surgery, the physician typically prepares a plurality of different sizes of pre-shaped catheters, such as JL6.0, JL5.0, JL4.5, JL4.0, JL3.5 and JL3.0 for the left-to-right catheter sizes in FIG. 2a (where JL represents the Judkins series of catheters capable of accessing the left coronary artery and the number following JL represents the distance between the two pre-shaped curves), such as JR 6.0, JR5.0, JR4.5, JR4.0, JR3.5 and JR3.0 for the left-to-right catheter sizes in FIG. 2b (where JR represents the Judkins series of catheters capable of accessing the right coronary artery and the number following JR represents the distance between the two pre-shaped curves), once the selected one size of pre-shaped catheter is found to be unsuitable for its distal end shape, the other pre-shaped catheters are withdrawn, and the catheter needs to be re-shaped, or even re-shaped to the desired anatomical shape of the distal end of the coronary artery of the catheter, further increasing the complexity of the procedure and prolonging the exposure time of the patient to X-rays, which is detrimental to the patient's health.

SUMMERY OF THE UTILITY MODEL

The utility model provides a transfer curved handle and include transfer curved handle's adjustable curved pipe can make through controlling the curved handle the distal end of adjustable curved pipe forms different compound curved shape immediately, different compound curved shape can be close human lumen different positions department respectively like the physiology anatomical structure of left coronary artery and right coronary artery to transfer curved handle through controlling and can also finely tune each curved shape in vivo in real time, thereby use same adjustable curved pipe just can implement the operation that has different requirements to the distal end form of adjustable curved pipe and intervene operation like left coronary artery intervention operation and right coronary artery intervention operation, and can adapt to different patient lumen physiology anatomical structure's individuation difference, reduce the number of times of puncture, reduce the damage to the human body, simplify the operation process, shorten operation time.

The bending adjusting handle is used for controlling at least two adjustable bending sections on the far end of the pipe body connected with the bending adjusting handle to bend, the bending adjusting handle comprises a driving mechanism and a control mechanism connected with the driving mechanism, and the driving mechanism is connected with all the adjustable bending sections; the control mechanism controls the driving mechanism to move in different forms through different actions, and the movements in different forms of the driving mechanism are respectively used for driving all the adjustable bending sections to bend simultaneously and driving each adjustable bending section to bend independently, so that different composite bending shapes are formed at the far end of the pipe body in real time.

The driving mechanism comprises a sliding part and at least two sub-sliding parts which are connected to the sliding part in a sliding manner, and one sub-sliding part is correspondingly connected with one adjustable bending section; the control mechanism comprises at least two first driving control pieces, and one first driving control piece correspondingly controls one sub-sliding piece; the first driving control piece independently acts to drive the corresponding sub-sliding piece to move relative to the sliding piece so as to independently drive the corresponding adjustable bending section to bend; all the first driving control pieces synchronously act to drive the sliding piece to move along the axial direction of the bending adjusting handle so as to simultaneously drive all the bending adjustable sections to bend.

Wherein the sub-sliding piece is a rack; the first driving control part comprises a fine adjustment knob and a gear shaft, one end of the gear shaft is provided with a gear meshed with the sub-sliding part, the other end of the gear shaft is connected with the fine adjustment knob, and one end of the gear shaft, provided with the gear, is rotatably connected with the sliding part; independently rotating the fine adjustment knob to drive the corresponding gear shaft to rotate so as to drive the corresponding sub-sliding part to move relative to the sliding part, so as to independently drive the corresponding adjustable bending section to bend; all the fine adjustment knobs synchronously move along the axial direction of the bending adjustment handle to drive all the gear shafts to move so as to drive the sliding pieces to move along the axial direction of the bending adjustment handle, and all the adjustable bending sections are driven to bend simultaneously.

The extending direction of the gear shaft is perpendicular to the axial direction of the bending adjusting handle.

The handle shell is arranged in the shell, the driving mechanism is located in the handle shell, the control mechanism is located outside the handle shell, and the control mechanism drives the driving mechanism to move relative to the handle shell.

The handle shell is provided with a guide hole extending along the axial direction of the bending adjusting handle, and the gear shaft penetrates through the guide hole and moves along the extending direction of the guide hole.

The control mechanism further comprises a second driving control piece, and the second driving control piece is sleeved outside the handle shell; a through hole is formed in the second driving control piece, the gear shaft penetrates through the second driving control piece through the through hole, a rotation stopping structure is arranged between the fine adjustment knob connected with the gear shaft and the through hole, and the rotation stopping structure is used for limiting the rotation of the fine adjustment knob; the second driving control piece moves along the axial direction of the handle shell to drive all the fine adjustment knobs and the gear shafts to synchronously move along the axial direction of the bending adjusting handle.

The inner wall of the through hole is provided with a plurality of clamping grooves, the fine adjustment knob comprises a connecting shaft connected with the gear shaft, the outer surface of the connecting shaft is provided with a plurality of rib positions corresponding to the clamping grooves, the clamping grooves and the rib positions form the rotation stopping structure, a first elastic piece is arranged between the gear and the fine adjustment knob, and when the first elastic piece naturally extends, the rib positions are clamped into the clamping grooves to prevent the fine adjustment knob from rotating; when the fine adjustment knob is pressed to compress the first elastic piece, the rib position is separated from the clamping groove, and the fine adjustment knob rotates.

The bending adjusting handle further comprises a locking piece, and the locking piece is arranged on the handle shell and used for locking the position of the second driving control piece on the handle shell.

The locking piece comprises a second elastic piece and a button, the button comprises a pressing part and a locking part vertically connected with the pressing part, the second elastic piece is connected between the pressing part and the handle shell, and when the second elastic piece naturally extends, the locking part locks the position of the second driving control piece on the handle shell; when the pressing part is pressed to compress the second elastic part, the locking part releases the locking of the second driving control part.

And a gear mark is arranged on the handle shell to mark the position of the second driving control piece on the handle shell.

The adjustable bending catheter comprises a catheter body, at least two traction pieces and the bending adjusting handle, wherein the bending adjusting handle is connected to the near end of the catheter body, and the far end of the catheter body is provided with at least two adjustable bending sections which are arranged at intervals; the far end of each traction piece is connected with one adjustable bending section, and the near end of each traction piece is connected with the driving mechanism in the adjustable bending handle.

Wherein, the body includes interior membrane, reinforcing pipe and the outer tube of suit in proper order from inside to outside.

Wherein the hardness of the outer tube corresponding to the adjustable bending section is less than that of other parts of the outer tube.

Wherein, pull the piece embedded in the pipe wall of body.

The traction piece comprises a traction wire, the far end of the traction wire is connected with the adjustable bending section, and the near end of the traction wire is correspondingly connected with the driving mechanism in the adjustable bending handle.

The traction wires correspondingly connected with the different adjustable bending sections are arranged on the same side of the pipe body, the parts, located on the corresponding adjustable bending sections, of the different traction wires are parallel to the axis of the pipe body, and the parts, located on the corresponding adjustable bending sections, of the different traction wires are respectively superposed with the plane formed by the axis of the pipe body.

The traction piece further comprises an anchoring ring, and the anchoring ring is embedded in the pipe wall of the adjustable bending section and is fixedly connected with the far end of the traction wire.

The traction piece further comprises a wire wrapping pipe, wherein the part of the traction wire, which is positioned in the pipe body, movably penetrates through the wire wrapping pipe, and the hardness of the wire wrapping pipe, which corresponds to the adjustable bending section, is smaller than that of other parts of the wire wrapping pipe.

Wherein the at least two adjustable bending sections comprise a first adjustable bending section located at the distal end of the tube body and a second adjustable bending section located at the proximal side of the first adjustable bending section; the hardness of the first adjustable bending section is less than the hardness of the second adjustable bending section.

Wherein the first adjustable bending section has a hardness ranging from 25D to 35D, and the second adjustable bending section has a hardness ranging from 45D to 55D.

The bending angle range of the first adjustable bending section is 0-90 degrees, and the bending angle range of the second adjustable bending section is-90-180 degrees.

The control mechanism controls the driving structure to simultaneously drive the first adjustable bending section and the second adjustable bending section to bend, so that a bending shape suitable for intervening left coronary artery or right coronary artery is formed; and the control mechanism controls the driving structure to independently drive the first adjustable bending section or the second adjustable bending section to bend so as to finely adjust the bending shape. Specifically, the second driving control element slides to a gear position close to the first shell in a far-end manner and is locked by the locking element, so as to drive the sliding element and all the sub-sliding elements to move far-end in the axial direction synchronously, drive the first adjustable bending section and the second adjustable bending section to bend simultaneously to form a bending shape close to the right coronary artery, and then independently rotate a fine-tuning knob to drive a corresponding sub-sliding element to slide in the axial direction relative to the sliding element, so that the first adjustable bending section or the second adjustable bending section is independently bent to finely tune the bending shape; the second driving control piece slides to a gear close to the second shell towards the near end and is locked by the locking piece, so that the sliding piece and all the sub-sliding pieces are driven to synchronously move towards the near end along the axial direction, the first adjustable bending section and the second adjustable bending section are driven to be bent simultaneously, a bending shape close to the left coronary artery is formed, then the fine adjustment knob is independently rotated to drive a corresponding sub-sliding piece to axially slide relative to the sliding piece, and the first adjustable bending section or the second adjustable bending section is independently bent to finely adjust the bending shape.

The utility model provides a transfer curved handle and adjustable curved pipe, through actuating mechanism motion can drive simultaneously respectively adjustable curved section is crooked simultaneously or pulls each difference respectively adjustable curved section is crooked to make the distal end of adjustable curved pipe form different compound curved shape immediately, different compound curved shape can be close human lumen different positions department respectively like the physiology anatomical structure of left coronary artery and right coronary artery, and can also finely tune each curved shape in vivo through controlling the handle of transferring the curve, thereby use same adjustable curved pipe just can implement the operation that has different requirements like the intervention of left coronary artery and the intervention of right coronary artery to the distal end form of adjustable curved pipe. In addition, the bending curvature of each adjustable bending section can be adjusted according to individual difference of physiological anatomical structures of lumens of different patients so as to adapt to requirements of different human bodies, reduce puncture times, reduce injury to the human body, simplify the operation process and shorten the operation time.

Drawings

To more clearly illustrate the structural features and effects of the present invention, the following detailed description is given with reference to the accompanying drawings and specific embodiments.

FIG. 1a is a schematic view of a pre-shaped catheter suitable for left coronary intervention;

FIG. 1b is a schematic view of a pre-shaped catheter suitable for right coronary intervention;

FIG. 2a is a schematic structural diagram of a Judkins Left pre-shaped catheter of different specifications suitable for Left coronary intervention;

FIG. 2b is a schematic diagram of a Judkins Right pre-shaped catheter of different specifications suitable for Right coronary intervention;

fig. 3 is a schematic perspective view of an adjustable bending conduit according to an embodiment of the present invention;

fig. 4 is a schematic perspective view of another direction of the adjustable bending conduit according to the embodiment of the present invention;

fig. 5 is a schematic view of a three-dimensional split structure of an adjustable bending catheter according to an embodiment of the present invention;

fig. 6 is a schematic cross-sectional view of the bend adjustment handle according to the embodiment of the present invention along the axial direction thereof;

FIG. 7 is a schematic cross-sectional view taken at I-I of FIG. 6;

fig. 8a is a schematic structural view of a bent shape of a pipe body according to an embodiment of the present invention;

fig. 8b is a schematic view of another bending configuration of the tube according to the embodiment of the present invention;

fig. 9 is a schematic three-dimensional split view of the driving mechanism and the control mechanism in the bending adjustment handle according to the embodiment of the present invention;

fig. 10 is a schematic structural view of a second inner shell in the bend adjustment handle according to the embodiment of the present invention;

fig. 11 is a schematic structural view of the sliding member in the bending adjustment handle according to the embodiment of the present invention;

fig. 12 is a schematic structural view of the bending adjustment handle inner sliding part according to the embodiment of the present invention;

fig. 13 is a schematic structural view of a pipe body according to an embodiment of the present invention;

fig. 14 is a schematic structural view of a pulling member and a tube body according to an embodiment of the present invention;

fig. 15 is a schematic structural view of a pulling member and a tube according to another embodiment of the present invention;

fig. 16 is a schematic structural view of a pulling member and a tube according to another embodiment of the present invention;

fig. 17 is a schematic view of the embodiment of the present invention in which the second driving control member is moved to a position mark, and the distal end of the tube can be inserted into the right coronary artery;

fig. 18 is a schematic view illustrating that the second driving control part of the tube body of the embodiment of the present invention moves to another gear mark, and the distal end of the tube body can intervene in the left coronary artery.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. The drawings are for illustrative purposes only and are merely schematic representations, not intended to limit the present patent.

For a more clear description of the structure of the bend adjustable handle and the bend adjustable catheter, the terms "proximal" and "distal" are defined herein as terms commonly used in the interventional medical field. Specifically, "distal" refers to the end of the surgical procedure that is distal from the operator, and "proximal" refers to the end of the surgical procedure that is proximal to the operator.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Referring to fig. 3 to 7 and fig. 8a and 8b, the present invention provides a bending adjustment handle 20 for controlling the bending direction and curvature of at least two adjustable bending sections 11 at the distal end of a tube 10 connected thereto, so that the distal end of the tube 10 can be formed into different composite bending shapes in real time, thereby satisfying the surgical requirements for different distal end configurations of the tube 10. In this embodiment, taking as an example that the bending adjusting handle 20 bends the distal end of the tube 10 to meet the requirement of the interventional operation of the left coronary artery and the right coronary artery on the distal end of the tube 10, the number of the adjustable bending sections 11 is two, and the two adjustable bending sections 11 are arranged on the tube 10 at intervals. In this embodiment, the bending adjustment handle 20 includes a handle housing 21, a driving mechanism 22, and a control mechanism 23 connected to the driving mechanism 22. The drive mechanism 22 is connected to all adjustable bends 11 via a number of traction elements 30 equal to the number of adjustable bends 11. The control mechanism 23 is connected with the driving mechanism 22 to control the driving mechanism 22 to move, so that the driving mechanism 22 moves to drive the adjustable bending section 11 to bend. The control mechanism 23 controls the driving mechanism 22 to move in different forms through different actions, and the movements in different forms of the driving mechanism are respectively used for simultaneously driving all the adjustable bending sections 11 to bend and independently driving each adjustable bending section 11 to bend, so that the distal end of the tube body 10 forms different composite bending shapes instantly. Specifically, all the adjustable bending sections 11 are driven to bend by the driving mechanism 22, so as to improve the bending efficiency, and the distal end of the tube body 10 can be bent as soon as possible to a shape close to some human body lumen anatomical structures required by the operation, such as a left coronary artery or a right coronary artery, thereby shortening the operation time. The driving structure 22 is used for respectively and independently driving each adjustable bending section 11 to bend, so that the bending curvature of each adjustable bending section 11 is finely adjusted, the bending curvature of each adjustable bending section 11 is accurately adjusted, the individualized differences of the physiological and anatomical structures of the lumens of different patients are adapted, and the application range of the tube body 10 is expanded.

Referring to fig. 3 to 9, the driving mechanism 22 is disposed in the handle housing 21, and the control mechanism 23 is disposed outside the handle housing 21. The control mechanism 23 drives the driving mechanism 22 to move axially along the handle housing 21 to drive the adjustable bending section 11 connected with the traction member 30 to bend or straighten. In this embodiment, the handle housing 21 includes a first inner housing 211, a second inner housing 212, a first outer housing 213 and a second outer housing 214. The first inner housing 211 and the second inner housing 212 are partially sleeved and fixed, in this embodiment, the first inner housing 211 is sleeved outside the second inner housing 212. The first outer shell 213 and the second outer shell 214 are disposed on the outer surface of the first inner shell 211 and/or the second inner shell 212 at intervals and expose a portion of the first inner shell 211. The first inner shell 211, the second inner shell 212, the first outer shell 213 and the second outer shell 214 may be integrally formed or formed by combining two or more sub-shells. In this embodiment, the first outer shell 213, the first inner shell 211, and the second inner shell 212 are all integrally formed structures, and the second outer shell 214 is formed by splicing two sub-shells. It is understood that in some embodiments of the present invention, only the first inner housing 211 or the second inner housing 212 may be included. The driving mechanism 22 is movably received in the second inner housing 212, and the control mechanism 23 is located between the first outer housing 213 and the second outer housing 214 and movably sleeved outside the first inner housing 211. Referring to fig. 3 to 5 and 10, at least two guiding holes 2111 are disposed on the first inner housing 211 and the second inner housing 212 exposed between the first outer housing 213 and the second outer housing 214, and the number of the guiding holes 2111 is the same as that of the adjustable bending sections 11. After the first inner housing 211 is sleeved with the second inner housing 212, the guide holes 2111 of the first inner housing 211 and the second inner housing 212 are overlapped. In this embodiment, the number of the guide holes 2111 is two, and the two guide holes 2111 are disposed opposite to each other. The proximal end of the second housing 214 is fixedly attached to the luer fitting 70.

Specifically, referring to fig. 5 to 7 and 9 to 12, the driving mechanism 22 includes a sliding member 221 slidably connected in the second inner housing 212, and at least two sub-sliding members 222 slidably connected to the sliding member 221 along the axial direction of the handle housing 21. Each sub-sliding member 222 is correspondingly connected with an adjustable bending section 11 through a pulling member 30, and when the sub-sliding member 222 slides relative to the handle housing 21, the corresponding pulling member 30 can be pulled, so that the corresponding adjustable bending section 11 can be bent with a certain curvature. In this embodiment, the sliding member 221 is driven to move in the second inner housing 212 along the axial direction of the second inner housing 212 to drive all the sub-sliding members 222 on the sliding member 221 to move synchronously relative to the second inner housing 212, so as to adjust the bending shapes of all the adjustable bending sections 11 simultaneously, thereby performing rapid bending adjustment on the distal end of the tube 10 to approach or obtain a desired state of the distal end of the tube 10, i.e., to achieve coarse adjustment of the distal end of the tube 10. For example, when the distal end shape of the tube 10 suitable for the left coronary intervention needs to be adjusted, the sliding piece 221 is moved towards the distal end of the tube 10, and then both the adjustable bending sections 11 are bent to the left with a certain curvature to form a compound bending shape capable of entering the left coronary; when the shape of the distal end of the tube body 10 suitable for the right coronary artery interventional operation needs to be adjusted, the sliding part 221 is moved towards the proximal end of the tube body 10, and then the two adjustable bending sections 11 are bent rightwards to form a certain curvature to form a compound bending shape capable of entering the right coronary artery. Further, by keeping the sliding member 221 still, the sub-sliding members 222 are separately adjusted to slide relative to the sliding member 221, and the bending sections 11 can be separately adjusted to bend to change the curvature, so that the distal end of the tube 10 can accurately reach a desired bending state, that is, fine adjustment of the distal end of the tube 10 can be achieved, and the distal end of the tube 10 can meet requirements of different operations and lumen anatomical structures of different patients.

In this embodiment, the control mechanism 23 includes at least two first driving controllers 231. The first driving control members 231 correspond to the sub-sliding members 222 one by one to drive the corresponding sub-sliding members 222 to move relative to the sliding member 221, and can drive the sliding member 221 to move relative to the handle housing 21 to bend the distal end of the catheter 10 to different configurations.

Specifically, referring to fig. 11, the sliding member 221 is a strip extending along the axial direction of the bending handle 20, and includes a bearing block 2211 and a driving block 2212 perpendicular to the middle of the bearing block 2211, that is, the cross section of the sliding member 221 is substantially an inverted T shape. One surface of the bearing block 2211 facing away from the driving block 2212 is provided with a sliding slot 2213 extending axially along the handle 20, the inner wall of the second inner housing 212 is provided with a protruding strip 2114 adapted to the sliding slot 2213, and the protruding strip 2114 is installed in the sliding slot 2213, so as to realize the axial movement of the sliding member 221 in the second inner housing 212. It is understood that the sliding slot 2213 can also be disposed on the inner wall of the second inner housing 212, and the protruding strip 2114 is disposed on the bearing block 2211. Further, the driving block 2212 is provided with a mounting hole 2214 penetrating the driving block 2212 in a direction perpendicular to the axial direction of the handle 20. It will be appreciated that the mounting hole 2214 can also be two grooves disposed on opposite sides of the drive block 2212. The sliding member 221 is provided with a through hole 2216 axially penetrating the sliding member 221 along the handle 20, the through hole 2216 is coaxially arranged with the axis of the handle 20, and the tube 10 passes through the through hole 2216 from the distal end of the first housing 213 and is connected with the luer 70 at the proximal end of the second housing 214.

Referring to fig. 6, 7, 9, 11 and 12, the sub-sliding member 222 is preferably a rack. In this embodiment, two sub-sliding members 222 are slidably connected to the bearing block 2211 of the sliding member 221, and are respectively located at two sides of the driving block 2212. Specifically, two opposite side surfaces of the sub-slider 222 are provided with a stroke slot 2221 extending axially along the handle 20, one surface of the bearing block 2211 facing the driving block 2212 is provided with a groove 2217, the opposite groove wall of the groove 2217 is provided with a rib 2215 matched with the stroke slot 2221, the sub-slider 222 is installed in the groove 2217 on the bearing block 2211, and the rib 2215 is slidably connected in the stroke slot 2221, so that the sub-slider 222 can move axially on the slider 221. The side of the sub-slider 222 facing away from the bearing block 2211 is provided with a plurality of teeth arranged along the extending direction of the stroke slot 2221. One surface of the sub-slider 222 facing the bearing block 2211 is provided with a receiving groove 2223, and the proximal end of the pulling element 30 is fixed in the receiving groove 2223 of the sub-slider 222, so that the proximal end of the pulling element 30 is received in the receiving groove 2223 and fixed in the sub-slider 222, and the situation that the pulling element 30 protrudes from the surface of the sub-slider 222 to affect the sliding of the sub-slider 222 relative to the slider 221 is avoided. Further, in this embodiment, the proximal end of the pulling member 30 is welded to a connecting block 2224, and the connecting block 2224 is embedded in the accommodating groove 2223, so that the pulling member 30 is more stably fixed to the sub-sliding member 222.

Referring further to fig. 5 to 12, each of the first driving control members 231 includes a fine adjustment knob 2311 and a gear shaft 2312. The axial direction of the gear shaft 2312 is perpendicular to the axial direction of the handle housing 21. One end of the gear shaft 2312 is provided with a gear 2313 engaged with the sub slider 222, and the other end is connected with the fine adjustment knob 2311. One end of the gear shaft 2312, which is provided with the gear 2313, passes through the guide hole 2111 of the handle housing 21, and the gear 2313 is engaged with the sub-slider 222. Further, in the present invention, a protrusion 2314 is disposed on a side of the gear 2313 away from the fine adjustment knob 2311, the protrusion 2314 penetrates into the mounting hole 2214 on the driving block 2212 and can rotate in the mounting hole 2214, that is, the gear shaft 2312 is rotatably connected to the slider 221, so that when the fine adjustment knob 2311 is pushed or pulled axially, the slider 221 can be pushed or pulled by the protrusion 2314 connected to the fine adjustment knob 2311 to drive all the sub-sliders 222 located thereon to move relative to the handle housing 21, thereby adjusting the bending configuration of all the adjustable bending sections 11 simultaneously, and realizing coarse adjustment of the distal end of the tube 10. When the fine adjustment knob 2311 is rotated, the gear shaft 2312 drives the gear 2313 to rotate, so as to drive the sub-slider 222 engaged with the gear 2313 to move relative to the slider 221, thereby adjusting the bending form of the adjustable bending section 11 connected with the sub-slider 222, i.e. fine adjustment of the distal end of the tube 10 is realized.

It is understood that in other embodiments of the present invention, the sub-slider 222 may also be a bar-shaped member having a plurality of grooves at intervals along the extending direction of the stroke slot 2221 at a side away from the bearing block 2211, one end of the gear shaft 2312 is provided with an engaging member engaged with the sub-slider 222 instead of a gear, and one end of the gear shaft 2312 provided with the engaging member is rotatably connected with the slider 221. The outer surface of the engaging member is provided with a plurality of protrusions corresponding to the grooves of the sub-slider 222. When the gear shaft 2312 drives the engaging member to rotate, the protrusions on the outer surface of the engaging member are sequentially engaged with the grooves on the sub-slider 222, so as to drive the sub-slider 222 to move relative to the slider 221.

Further, in the present invention, the control mechanism 23 further includes a second driving control element 232. In this embodiment, the second driving control member 232 is a sleeve. The second driving control element 232 is sleeved outside the first inner housing 211 and located between the first outer housing 213 and the second outer housing 214, and two through holes 233 are formed in the second driving control element 232. The gear shaft 2312 passes through the through hole 232 and the guide hole 2111 of the handle housing 21, so that the gear 2313 of the gear shaft 2312 is engaged with the sub-slider 222. Pushing or pulling the second drive control 232 in the axial direction causes all of the fine adjustment knobs 2311 to move synchronously, thereby further stabilizing the sliding movement of the slider 221 relative to the handle housing 21.

Further, in this embodiment, a plurality of locking grooves 2331 are formed in the inner wall of the through hole 233, and the extending direction of the locking grooves 2331 is the same as the extending direction of the through hole 233. The fine adjustment knob 2311 comprises a knob portion 2311a and a connecting shaft 2311b connected with the knob portion 2311a and located in the center of the knob portion 2311a, and the axis of the connecting shaft 2311b is coaxial with the rotating shaft of the knob portion 2311a and the axis of the gear shaft 2312. A plurality of rib positions 2311c corresponding to the clamping grooves 2331 are arranged on the outer surface of the connecting shaft 2311b, a first elastic piece 2315 is arranged between the gear 2313 and the fine adjustment knob 2311, when the first elastic piece 2315 naturally extends, the rib positions 2311c are clamped into the clamping grooves 2331, the fine adjustment knob 2311 stops rotating, and therefore the fine adjustment knob 2311 cannot drive the gear shaft 2312 and the gear 2313 to rotate, and the sub-sliding piece 222 is prevented from sliding relative to the sliding piece 221; when the fine adjustment knob 2311 is pressed to compress the first elastic member 2315, the rib portions 2311c are separated from the slots 2331, and at this time, the gear shaft 2312 and the gear 2313 can be driven to rotate by rotating the fine adjustment knob 2311, so that the sub-slider 222 can slide relative to the slider 221. That is, when all the adjustable bending sections 11 need to be adjusted to be bent at the same time, the fine adjustment knob 2311 is not operated, under the action of the first elastic member 2315, the rib portions 2311c are clamped into the clamping grooves 2331, the fine adjustment knob 2311 stops rotating, the gear shaft 2312 is prohibited from driving the gear 2313 to rotate, so that the sub-sliding member 222 is fixed relative to the sliding member 221, and at this time, pushing or pulling the second driving control member 232 along the axial direction of the handle 20 can drive the sliding member 221 and all the sub-sliding members 222 on the sliding member 221 to move synchronously relative to the handle housing 21, so as to adjust all the adjustable bending sections 11 to be bent at the same time. When a certain adjustable bending section 11 needs to be individually adjusted, the second driving control element 232 can be kept still, the corresponding fine adjustment knob 2311 is pressed inwards to enable the fine adjustment knob 2311 to be separated from a rotation stop state, and the fine adjustment knob 2311 is rotated, so that the corresponding gear shaft 2312 and the gear 2313 can be driven to rotate, the corresponding sub-sliding piece 222 moves relative to the sliding piece 221, and fine adjustment of the bending state of the single adjustable bending section 11 is achieved. In this embodiment, the first elastic member 2315 is preferably a spring, and the first elastic member 2315 is sleeved outside the gear shaft 2312. Further, in some embodiments of the present invention, the connecting shaft 2311b of the fine adjustment knob is hollow, the gear shaft 2312 is inserted into the connecting shaft 2311b, and a gap exists between the connecting shaft 2311b and the gear shaft 2312 in the axial direction thereof, so as to allow the fine adjustment knob 2311 to move inward along the axial direction thereof when being pressed, so that the rib 2311c is disengaged from the locking groove 2331, without causing the gear shaft 2312 and the gear 2313 to move relative to the sub-slider 222 along the axial direction thereof.

Further, referring to fig. 5 and fig. 6, the bend adjustment handle 20 further includes a locking member 40, and the locking member 40 is disposed on the handle housing 21 and is used for locking the position of the second driving control member 232 on the handle housing 21. In this embodiment, the locking member 40 includes a second elastic member 41 and a button 42. In this embodiment, the second elastic member 41 is preferably a spring. The push button 42 includes a pressing portion 421 and a locking portion 422 perpendicularly connected to the pressing portion 421. The second elastic member 41 is connected between the pressing portion 421 and the handle housing 21. Specifically, one end of the second elastic member 41 is connected to the second inner shell 212 of the handle housing 21, and the other end passes through the first outer shell 213 or the second outer shell 214 and is connected to the pressing portion 421. When the second elastic member 41 naturally extends, the locking part 422 locks the position of the second driving control member 232 on the handle housing 21; when the pressing portion 421 is pressed to compress the second elastic member 41, the locking portion 422 releases the locking of the second driving control member 232. In this embodiment, the locking portion 422 is a hook-shaped member having one end fixed to the pressing portion 421, the end of the second driving control member 232 close to the first housing 213 and the end close to the second housing 214 are both provided with a groove or an opening 215, when the second driving control member 232 is moved to be close to the first housing 213 or the second housing 214, the pressing portion 421 is engaged with the groove or the opening 215, so as to lock the position of the second driving control member 232 on the handle housing 21, at this time, the bending shape of the corresponding adjustable bending section 11 can be finely adjusted by rotating the fine adjustment knob 2311, after the desired bending shape of the distal end of the tube 10 is obtained, the fine adjustment knob 2311 is engaged with the corresponding through hole 233 on the second driving control member 232 to stop rotating, so as to prevent the positions of the second driving control member 232 and the first driving control member 231 from changing during the operation, i.e., to avoid changes in the curved configuration of the distal end of the tube 10 during the procedure so that the distal end of the tube 10 remains in the desired curved configuration. In this embodiment, the distal end of the tube 10 can be suitable for both left coronary intervention and right coronary intervention, and the two locking members 40 are respectively disposed on the first housing 213 and the second housing 214: when the second driving control element 232 moves to a position close to the first housing 213 and is locked by the locking element 40, the bending shape of the distal end of the tube 10 is close to the physiological anatomical structure of the right coronary artery, and the bending shape of each adjustable bending section 11 is finely adjusted by the fine adjustment knob 2311, so that the distal end of the tube 10 can adapt to the difference of the physiological anatomical structures of the right coronary artery of different patients and smoothly enter the right coronary artery, and the right coronary artery intervention operation is suitable for right coronary artery intervention; when the second driving control element 232 moves to a position close to the second housing 212 and is locked by another locking element 40, the bending shape of the distal end of the tube 10 approaches the physiological anatomical structure of the left coronary artery, and the bending shape of each adjustable bending section 11 is finely adjusted by the fine adjustment knob 2311, so that the distal end of the tube 10 can smoothly enter the left coronary artery to adapt to the difference of the physiological anatomical structures of the left coronary artery of different patients, and the device is suitable for left coronary artery interventional surgery.

Further, a shift mark 50 is arranged on the handle casing 21 of the bend-adjusting handle 20 on the stroke of the second driving control member 232 moving along the axial direction of the handle casing 21, so as to mark the position of the second driving control member 232 on the handle casing 21. In this embodiment, the gear marks 50 are respectively disposed at positions where the two locking members 40 are located.

The utility model provides a transfer curved handle 20, through control structure 23 does different motion control actuating mechanism 22 does different forms's motion, actuating mechanism 22 different forms's motion is used for driving simultaneously all respectively adjustable curved section 11 is crooked and individual drive each adjustable curved section 11 is crooked, is applicable to the operation that has different requirements to the crooked form of distal end of body 10 and intervenes the operation like left coronary artery intervention operation and right coronary artery intervention operation to can adapt to different patient lumen physiology anatomical structure's individuation difference.

Referring to fig. 3 to 7, 8a, 8b, 17 and 18, the present invention provides an adjustable bending catheter 100 including the bending handle 20. The adjustable bending catheter 100 can be used in a variety of procedures where different requirements are placed on the shape of the distal end of the catheter. The present invention is described by taking the example of the adjustable curved catheter 100 used in the intervention operation of the left coronary artery and the right coronary artery. The adjustable bending catheter 100 comprises a catheter body 10, the bending handle 20 and at least two traction members 30. The bending handle 20 is connected to the proximal end of the tube 10. The far end of the tube body 10 is provided with at least two adjustable bending sections 11 which are arranged at intervals. One end of the traction member 30 is correspondingly connected with one of the adjustable bending sections 11, and the other end is correspondingly connected with a sub-sliding member 222 in the bending adjusting handle 20. The traction piece 30 is arranged along the pipe body 10 and can move along the pipe body 10, and the bending adjusting handle 20 controls the traction piece 30 to move along the pipe body 10 so as to drive the bending adjustable section 11 to bend. In the present invention, when the sliding member 221 is driven to move axially by pushing and pulling the second driving control member 232 on the bending adjustment handle 20, all the pulling members 30 can be synchronously controlled to move along the pipe body 10, so as to simultaneously drive all the bending adjustable sections 11 to bend, thereby improving the efficiency of adjusting the bending adjustable catheter 100; by rotating the fine adjustment knob 2311 of each first driving control element 231 to drive the corresponding sub-sliding element 222 to move axially relative to the sliding element 221, the corresponding pulling element 30 can be controlled to move along the tube body 10 individually to bend the corresponding adjustable bending section 11, so as to further adjust the distal end of the adjustable bending catheter 100 to a desired bending shape. It will be appreciated that the adjustable bending section 11 may be three or more sections depending on the anatomical structure of the lumen into which the adjustable bending catheter 100 is to be introduced.

Referring to fig. 8a, 8b and 13, the tube 10 includes an inner film 10a, a reinforcing tube 10b sleeved on the inner film 10a, and an outer tube 10c sleeved on the reinforcing tube 10 b. In this embodiment, the inner membrane 10a is a flexible tube made of flexible material such as PTFE; the reinforcing tube 10b is preferably a metal woven mesh structure, has certain rigidity, and can be bent in the axial direction, so that the support is provided for the tube body 10, the twisting deformation of the tube body 10 in the radial direction is avoided, the twisting control performance of the tube body 10 is improved, and the bending of each adjustable bending section 11 on the tube body 10 is not influenced; the outer tube 10c is made of a material having excellent biocompatibility and a certain hardness, such as PEBAX. Moreover, the hardness of the outer tube 10c corresponding to the adjustable bending section 11 is less than that of the other parts of the outer tube 10c, so that the adjustable bending section 11 is easier to bend. Specifically, in the present embodiment, the part of the outer tube 10c corresponding to the adjustable bending section 11 and other parts respectively use PEBAX materials with different brands, and the hardness of the PEBAX material used for the part of the outer tube 10c corresponding to the adjustable bending section 11 is less than that of the PEBAX material used for the other parts of the outer tube 10c, so that the hardness of the part of the outer tube 10c corresponding to the adjustable bending section 11 is less than that of the other parts of the outer tube 10 c. Further, in this embodiment, the inner tube 10a, the reinforcing tube 10b and the outer tube 10c are formed by heat-melting and composite molding, so as to form at least one delivery lumen extending completely from the proximal end to the distal end. It is understood that in other embodiments of the present invention, the inner membrane 10a, the reinforcing tube 10b and the outer tube 10c may be made of other materials than the embodiment, if the use requirement is satisfied.

Further, in this embodiment, the distal end of the tubular body 10 is an arc-shaped end with a smooth surface, i.e. a Tip head, and a radiopaque developing ring (not shown), such as a tantalum ring, is disposed near the Tip head, so that whether the distal end of the tubular body 10 reaches a desired position can be accurately known under a developing device.

Referring to fig. 8a, 8b and 13 to 16, the pulling element 30 is embedded in the wall of the tube 10 and is disposed along the axial direction of the tube 10. Specifically, in this embodiment, the pulling member 30 is located between the inner membrane 10a and the reinforcing tube 10 b. The traction member 30 includes a traction wire 31, a distal end of the traction wire 31 is connected to an adjustable bending section 11, a proximal end of the traction wire 31 penetrates through a tube wall of the proximal end of the tube body 10 and is connected to a corresponding sub-sliding member 222 in the bending handle 20, and the sub-sliding member 222 slides to drive the traction wire 31 to move so as to drive the corresponding adjustable bending section 11 to bend. In this embodiment, the number of the adjustable bending sections 11 is two, and the two adjustable bending sections are respectively a first adjustable bending section 11a and a second adjustable bending section 11 b; there are also two pulling elements 30, a first pulling element 30a and a second pulling element 30 b. The first pulling member 30a connects the first adjustable bending section 11a with a sub-sliding member 222 in the bending adjustment handle 20, and the second pulling member 30b connects the second adjustable bending section 11b with another sub-sliding member 222 in the bending adjustment handle 20.

In this embodiment, the first adjustable bending section 11a is mainly used for selecting a left coronary artery or a right coronary artery and controlling the depth of penetration into the crown by adjusting the bending form thereof, so that the length of the first adjustable bending section 11a is required to be relatively small, preferably 10mm to 15mm, and the first adjustable bending section 11a is required to be more flexible than the second adjustable bending section 11b, so that bending can be continued on the basis that the bending shape of the second adjustable bending section 11b is basically fixed, so that the first adjustable bending section 11a is required to be more flexible than the second adjustable bending section 11b, in this embodiment, the hardness of the first adjustable bending section 11a is preferably 25D to 35D. The second adjustable bending section 11b needs to provide support for the first adjustable bending section 11a to make the first adjustable bending section 11a more accessible to the entrance of the left or right coronary artery, so it is required that the length of the second adjustable bending section 11b is longer, preferably 25mm to 35mm, and the hardness is higher than that of the first adjustable bending section 11a, preferably 45D to 55D. Except for the Tip, the first adjustable bending section 11a and the second adjustable bending section 11b, the other portion of the pipe 10 should have higher hardness to ensure the twisting control and the support of the pipe 10, so the hardness needs to be higher, and in this embodiment, the hardness of the other portion of the pipe 10 is 72D. Further, the bending angle of the first adjustable bending section 11a (the included angle between the pipe body adjacent to the proximal end of the first adjustable bending section 11a and the proximal end tangent of the first adjustable bending section 11 a) ranges from 0 degree to 90 degrees, and the bending angle of the second adjustable bending section 11b ranges from-90 degrees to 180 degrees (the included angle between the pipe body adjacent to the proximal end of the second adjustable bending section 11b and the proximal end tangent of the second adjustable bending section 11 b), so that the far end of the pipe body 10 can be bent in two directions, and the requirement of the intervention operation of the left coronary artery and the right coronary artery is met. It is understood that, in other embodiments of the present invention, when the bendable catheter 100 is used for other interventional operations of human body, three or more bendable sections 11 can be set as required, and the bendable range of each bendable section 11 can be adjusted accordingly to meet the requirements of the operation.

In this embodiment, if all the pulling wires 31 are synchronously pulled or pushed at the proximal end of the tube 10, all the adjustable bending sections 11 are bent, and the positions of the proximal ends of all the pulling wires 31 are synchronously controlled to be different, so that different bending shapes compounded by all the adjustable bending sections 11 can be obtained, for example, synchronously pushing all the pulling wires 31 towards the distal end to the first position can enable all the adjustable bending sections 11 to be compounded to form a bending shape close to the right coronary artery, synchronously pulling all the pulling wires 31 towards the proximal end to the second position can enable all the adjustable bending sections 11 to be compounded to form a bending shape close to the left coronary artery, and independently pushing or pulling one pulling wire 31, the pulling wire 31 can drive the corresponding adjustable bending section 11 to realize bending in a certain angle range, so that after all the pulling wires 31 are synchronously controlled, fine adjustment of the bending shape of the corresponding adjustable bending section 11 can be performed by independently controlling one pulling wire 31, the bending shape of the far end of the tube body 10 can be suitable for the anatomical shapes of coronary arteries of different patients; if the acting force on the traction wire 31 is cancelled, the corresponding adjustable bending section 11 can be restored under the action of the elasticity of the corresponding adjustable bending section.

The cross-sectional shape of the traction wire 31 may be a circular shape or a flat shape. The diameter range of the traction wire 31 is 0.05 mm-0.25 mm. The pull wire 31 is preferably made of a metallic material, such as stainless steel, tungsten alloy, cobalt-chromium alloy, or nickel-titanium alloy. It is understood that in other embodiments, the pull wire 31 may be made of a polymer material with certain strength. Preferably, in this embodiment, the pulling wire 31 is a stainless steel wire with a diameter of 0.20 mm.

Further, referring to fig. 13 to 16, an anchoring ring 32 is disposed at an end of the pulling wire 31 connected to the adjustable bending section 11, and the anchoring ring 32 is fixedly sleeved on the adjustable bending section 11, that is, a distal end of the pulling wire 31 is connected to the adjustable bending section 11 through the anchoring ring 32. In this embodiment, the anchor ring 32 is sleeved on the inner membrane 10a at a position corresponding to the adjustable bending section 11. The contact area between the traction part 30 and the adjustable bending section 11 on the pipe body 10 is increased through the anchoring ring 32, so that the adjustable bending section 11 can be better driven to bend. The anchor ring 32 may be made of a metal material or a polymer material, and in this embodiment, the anchor ring 32 is made of a metal such as SUS304 stainless steel. The means for connecting the traction wire 31 to the anchoring ring 32 include, but are not limited to, bonding, welding, heat fusing, knotting, etc., and are not limited thereto.

The traction member 30 further comprises a wire wrapping tube 33, wherein a part of the traction wire 31 positioned in the tube body 10 is movably arranged in the wire wrapping tube 33, so that the traction direction of the traction wire 31 is limited by the wire wrapping tube 33, and the traction wire 31 is protected by the wire wrapping tube 33. The utility model discloses in, the internal diameter of package silk pipe 33 slightly is greater than the diameter of traction wire 31 and wears to establish wherein in order for traction wire 31, can avoid body 10 to hold traction wire 31 tightly in the hot melt shrink and lead to the unable smooth and easy endwise slip of traction wire 31 to prevent that traction wire 31 from breaking because of the bending. In this embodiment, the inner diameter of the filament-wrapping tube 33 may be selected to be 0.40 mm. It should be noted that the hardness of the wire-wrapping tube 33 corresponding to the adjustable bending section 11 should be less than that of other portions, i.e., the portion of the wire-wrapping tube 33 corresponding to the adjustable bending section 11 is flexible so as not to affect the bending of the adjustable bending section 11. For example, the portion of the threading tube 33 embedded in the adjustable bending section 11 may be a soft PTFE thin tube, while the other portion may be a PI thin tube or a stainless steel thin tube.

Further, in the present invention, the pulling wire 31 is fixedly connected to the corresponding sub-sliding member 222 in the bending adjustment handle 20 after penetrating out from the proximal end of the tube 10. Moreover, a stiffening tube (not shown) is fixedly sleeved outside the connection part of the pull wire 31 and the sub-sliding member 222, and the strength of the stiffening tube is greater than that of the wire wrapping tube 33, so that the strength of the connection part of the sub-sliding member 222 of the pull wire 31 is increased, the pull wire 31 is prevented from being broken, and the connection of the pull wire 31 and the sub-sliding member 222 is facilitated. In this embodiment, the stiffened tube includes, but is not limited to, a stainless steel tube. Further, the present embodiment further includes a splitting head (not shown), through which different pulling wires 31 are guided into the extending path of the bending handle 20 after the pulling wires 31 are passed out of the tube 10, so as to connect different sub-sliding members 222.

Referring to fig. 14 and 15, the drawing wires 31 correspondingly connected to different adjustable bending sections 11 are disposed on the same side of the pipe 10, a portion of the drawing wire 31 of the first drawing member 30a corresponding to the first adjustable bending section 11a and a portion of the drawing wire 31 of the second drawing member 30b corresponding to the second adjustable bending section 11 are both parallel to the axis of the pipe 10, and a plane formed by a portion of the drawing wire 31 of the first drawing member 30a corresponding to the first adjustable bending section 11a and the axis of the pipe 10 and a plane formed by a portion of the drawing wire 31 of the second drawing member 30b corresponding to the second adjustable bending section 11 are overlapped with a plane formed by the axis of the pipe 10, so that when the drawing wire 31 of the first drawing member 30a and the second drawing member 30b drives the first adjustable bending section 11a and the second adjustable bending section 11b to bend, the planes where the first adjustable bending section 11a and the second adjustable bending section 11b bend are coplanar, so that the distal end of the adjustable bending catheter 100 is more easily controlled and the distal end of the bent adjustable bending catheter 100 can enter the target lumen more easily.

Specifically, please refer to fig. 14, in an embodiment of the present invention, the two anchoring rings 32 are respectively provided with an arc portion that is concave inwards or a convex arc portion that is convex outwards relative to the outer periphery of the anchoring ring 32, the two wire wrapping tubes 33 are respectively fixed in the arc portions, the wire wrapping tube 33 on the first traction member 30a is overlapped on the wire wrapping tube 33 on the second traction member 30b in the radial direction of the pipe body 10, the traction wire 31 is inserted into the wire wrapping tube 33, so that the plane formed by the traction wire 31 of the first traction member 30a and the axis of the pipe body 10 and the plane formed by the traction wire 31 of the second traction member 30b and the axis of the pipe body 10 coincide, and the plane where the first adjustable bending section 11a bends under the driving of the traction wire 31 in the corresponding wire wrapping tube 33 and the plane where the second adjustable bending section 11b bends under the driving of the traction wire 31 in the corresponding wire wrapping tube 33 are coplanar. Referring to fig. 15, in another embodiment of the present invention, two anchoring rings 32 are respectively disposed with an arc portion protruding outward from the periphery of the anchoring ring 32, two wire wrapping tubes 33 are respectively fixed in the arc portion, a portion of the wire wrapping tube 33 on the first pulling member 30a corresponding to the first adjustable bending section 11a and a portion of the wire wrapping tube 33 on the second pulling member 30b corresponding to the second adjustable bending section 11b are both parallel to the axis of the pipe 10 and are located on the same straight line, and a pulling wire is threaded into the wire wrapping tubes, so that a plane formed by a portion of the pulling wire 31 of the first pulling member 30a corresponding to the first adjustable bending section 11a and the axis of the pipe 10 and a plane formed by a portion of the pulling wire 31 of the second pulling member 30b corresponding to the second adjustable bending section 11 are overlapped with the plane formed by the axis of the pipe 10, and the plane formed by the pulling wire 31 of the first adjustable bending section 11a under the driving of the pulling wire wrapping tube 33 and a plane formed by the second bending section 11b under the driving of the pulling wire 31 under the adjustable wire wrapping tube 33 The planes of the curves are coplanar; the wire-wrapping tube 33 of the first pulling member 30a is bent at a position close to the anchoring ring 32 of the first pulling member 30b so that the wire-wrapping tube 33 of the first pulling member 30a is juxtaposed with the wire-wrapping tube 33 of the second pulling member 30b except for the portion corresponding to the first adjustable bent section 11 a.

It can be understood that, referring to fig. 16, in other embodiments of the present invention, the wire wrapping tube 33 on the first pulling member 30a and the wire wrapping tube 33 on the second pulling member 30b may be arranged side by side, that is, the two pulling wires 31 are arranged side by side, so that the plane where the first pulling member 30a drives the first adjustable bending section 11a to bend is not coplanar with the plane where the second pulling member 30b drives the e-th adjustable bending section 11b to bend.

The utility model provides a catheter 100 that can bend, through controlling bend adjusting handle 20 can make the distal end of body 10 form different compound curved shape immediately, different compound curved shape can be close human lumen different positions department respectively like the physiology anatomical structure of left coronary artery and right coronary artery, and can also finely tune the curved shape of each adjustable curved section 11 in vivo in real time through controlling bend adjusting handle 20, thereby use same catheter 100 that can bend just can implement the operation that has different requirements to the distal end form of catheter that can bend intervene operation and right coronary artery and intervene the operation like left coronary artery, and can adapt to different patient lumen physiology anatomical structure's individuation difference, reduce the number of times of puncturing, reduce the damage to the human body, simplify the operation process, shorten operation time.

Referring to fig. 3 to 9, 17 and 18, when the adjustable curved catheter 100 is used to perform a left coronary intervention and a right coronary intervention, the catheter 10 reaches the entrance of the coronary artery through the radial artery. The second drive control 232 is manually operated to slide distally to a gear position adjacent to the first housing 213 and lock the second drive control 232 via the locking member 40. In the process that the second driving control element 232 slides to the gear position close to the first housing 213, the second driving control element 232 drives the first driving control element 231, the sub-sliding element 222 and the sliding element 221 to move axially synchronously, the sub-sliding element 222 pushes all the pulling wires 31 towards the distal end, so that all the adjustable bent sections 11 are combined to form a bent shape close to the right coronary artery, and then the fine adjustment knob 2311 is pushed inwards to make the rib position 2311c separate from the clamping groove 2331 and rotate the fine adjustment knob 2311, so that the corresponding sub-sliding element 222 can be driven to slide axially on the sliding element 221, so that the pulling wires 31 are driven to act on the corresponding adjustable bent sections 11, the bent shape of the corresponding adjustable bent section 11 is fine adjusted, and the distal end of the tube body 10 can smoothly enter the right coronary artery. When the diagnosis and treatment of the right coronary artery are finished and the diagnosis and treatment of the left coronary artery are needed, the locking piece 40 for locking the second driving control piece 232 is manually pressed downwards, the second driving control piece 232 is unlocked, the second driving control piece 232 is pulled to slide towards the near end to a gear position close to the second shell 214, the second driving control piece 232 is locked through the other locking piece 40, in the process, the rib position 2311c on the fine adjustment knob 2311 is clamped into the clamping groove 2331, the gear 2313 cannot rotate, therefore, the position of the sub-sliding piece 222 relative to the sliding piece 221 is not changed, the second driving control piece 232 drives the first driving control piece 231, the sub-sliding piece 222 and the sliding piece 221 to synchronously move axially, the sub-sliding piece 222 pulls all the pull wires 31 towards the near end, all adjustable bent sections 11 can be instantly compounded to form a bent shape which is close to the intervention of the left coronary artery, and then the rib position 2311c is separated from the clamping groove 2331 by pushing the fine adjustment knob 2311 inwards and rotating the fine adjustment The member 222 slides axially on the sliding member 221, so as to drive the traction wire 31 to act on the corresponding adjustable bending section 11, and to finely adjust the bending shape of the corresponding adjustable bending section 11, so that the distal end of the catheter can smoothly enter the left coronary artery. Therefore, the utility model discloses adjustable curved pipe 100 can realize that an adjustable curved pipe 100 can be applicable to left coronary artery and intervene the operation, can be applicable to right coronary artery again and intervene the operation to each adjustable curved section 11 can finely tune in real time respectively, can adapt to different patient's coronary artery anatomical morphology.

It should be understood that the above embodiment only provides two adjustable bending sections 11 on the tube 10, and in other embodiments, a greater number of adjustable bending sections 11 can be provided, as long as a corresponding number of sub-sliding members 222 and first driving control members 232 are adaptively disposed in the bending handle 20.

The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations are also considered as the protection scope of the present invention.

Claims

1. A bending adjusting handle is characterized by being used for controlling at least two bending adjustable sections on the far end of a pipe body connected with the bending adjusting handle to bend, the bending adjusting handle comprises a driving mechanism and a control mechanism connected with the driving mechanism, and the driving mechanism is connected with all the bending adjustable sections; the control mechanism controls the driving mechanism to move in different forms through different actions, and the movements in different forms of the driving mechanism are respectively used for driving all the adjustable bending sections to bend simultaneously and driving each adjustable bending section to bend independently, so that different composite bending shapes are formed at the far end of the pipe body in real time.

2. The bend-adjusting handle according to claim 1, wherein the driving mechanism comprises a sliding member, at least two sub-sliding members slidably connected to the sliding member, and one of the sub-sliding members is correspondingly connected to one of the adjustable bending sections; the control mechanism comprises at least two first driving control pieces, and one first driving control piece correspondingly controls one sub-sliding piece; the first driving control piece independently acts to drive the corresponding sub-sliding piece to move relative to the sliding piece so as to independently drive the corresponding adjustable bending section to bend; all the first driving control pieces synchronously act to drive the sliding piece to move along the axial direction of the bending adjusting handle so as to simultaneously drive all the bending adjustable sections to bend.

3. A bend-adjusting handle as set forth in claim 2, wherein said sub-slider is a rack; the first driving control part comprises a fine adjustment knob and a gear shaft, one end of the gear shaft is provided with a gear meshed with the sub-sliding part, the other end of the gear shaft is connected with the fine adjustment knob, and one end of the gear shaft, provided with the gear, is rotatably connected with the sliding part; independently rotating the fine adjustment knob to drive the corresponding gear shaft to rotate so as to drive the corresponding sub-sliding part to move relative to the sliding part, so as to independently drive the corresponding adjustable bending section to bend; all the fine adjustment knobs synchronously move along the axial direction of the bending adjustment handle to drive all the gear shafts to move so as to drive the sliding pieces to move along the axial direction of the bending adjustment handle, and all the adjustable bending sections are driven to bend simultaneously.

4. The bend-adjusting handle according to claim 3, wherein the gear shaft extends in a direction perpendicular to the axial direction of the bend-adjusting handle.

5. A bend-adjusting handle as set forth in claim 4 further comprising a handle housing, said drive mechanism being located within said handle housing, said control mechanism being located outside said handle housing, said control mechanism moving said drive mechanism relative to said handle housing.

6. The bend-adjusting handle according to claim 5, wherein the handle housing is provided with a guide hole extending in an axial direction of the bend-adjusting handle, and the gear shaft passes through the guide hole and moves in an extending direction of the guide hole.

7. The bend-adjusting handle according to claim 5 or 6, wherein the control mechanism further comprises a second driving control member, the second driving control member is sleeved outside the handle housing; a through hole is formed in the second driving control piece, the gear shaft penetrates through the second driving control piece through the through hole, a rotation stopping structure is arranged between the fine adjustment knob connected with the gear shaft and the through hole, and the rotation stopping structure is used for limiting the rotation of the fine adjustment knob; the second driving control piece moves along the axial direction of the handle shell to drive all the fine adjustment knobs and the gear shafts to synchronously move along the axial direction of the bending adjusting handle.

8. The bending adjusting handle according to claim 7, wherein a plurality of clamping grooves are formed in the inner wall of the through hole, the fine adjustment knob comprises a connecting shaft connected with the gear shaft, a plurality of rib positions corresponding to the clamping grooves are formed in the outer surface of the connecting shaft, the clamping grooves and the rib positions form the rotation stopping structure, a first elastic member is arranged between the gear and the fine adjustment knob, and when the first elastic member naturally extends, the rib positions are clamped into the clamping grooves to prevent the fine adjustment knob from rotating; when the fine adjustment knob is pressed to compress the first elastic piece, the rib position is separated from the clamping groove, and the fine adjustment knob rotates.

9. A bend adjusting handle as set forth in claim 7 further comprising a locking member disposed on said handle housing for locking the position of said second drive control member on said handle housing.

10. A bending adjustment handle according to claim 9, wherein the locking member comprises a second elastic member and a button, the button comprises a pressing portion and a locking portion perpendicularly connected to the pressing portion, the second elastic member is connected between the pressing portion and the handle housing, and the locking portion locks the position of the second driving control member on the handle housing when the second elastic member is naturally extended; when the pressing part is pressed to compress the second elastic part, the locking part releases the locking of the second driving control part.

11. A bend-adjusting handle as set forth in claim 10 wherein said handle housing is provided with a gear indicator to indicate where said second drive control is located on said handle housing.

12. An adjustable bending catheter, which comprises a catheter body, at least two traction members and a bending adjusting handle according to any one of claims 1 to 11, wherein the bending adjusting handle is connected to the proximal end of the catheter body, and the distal end of the catheter body is provided with at least two adjustable bending sections arranged at intervals; the far end of each traction piece is connected with one adjustable bending section, and the near end of each traction piece is connected with the driving mechanism in the adjustable bending handle.

13. The adjustable bend catheter of claim 12, wherein the tubular body comprises an inner membrane, a reinforcing tube and an outer tube, which are sequentially sleeved from inside to outside.

14. The adjustable bend catheter of claim 13, wherein the outer tube has a stiffness corresponding to the adjustable bend section that is less than a stiffness of other portions of the outer tube.

15. The adjustable bend catheter of claim 12, wherein the pulling member is embedded within the wall of the tubular body.

16. The adjustable bending catheter of claim 15, wherein the pull member comprises a pull wire having a distal end coupled to one of the adjustable bending segments and a proximal end coupled to the drive mechanism within the bending handle.

17. The catheter of claim 16, wherein the pull wires associated with different of the sections are disposed on the same side of the catheter body, wherein the portions of the different pull wires located in the corresponding sections are parallel to the axis of the catheter body, and wherein the portions of the different pull wires located in the corresponding sections are coincident with the plane defined by the axis of the catheter body.

18. The steerable catheter of claim 16, wherein the puller further comprises an anchoring ring embedded within the wall of the steerable segment and affixed to the distal end of the puller wire.

19. The adjustable bending catheter according to claim 16, wherein the pulling member further comprises a wire wrapping tube, a portion of the pulling wire located in the catheter body is movably disposed in the wire wrapping tube, and the hardness of the wire wrapping tube corresponding to the adjustable bending section is less than that of other portions of the wire wrapping tube.

20. The adjustable bend catheter of claim 12, wherein said at least two adjustable bend segments comprise a first adjustable bend segment at a distal end of said catheter body and a second adjustable bend segment proximal to said first adjustable bend segment; the hardness of the first adjustable bending section is less than the hardness of the second adjustable bending section.

21. The adjustable bend catheter of claim 20, wherein the first adjustable bend segment has a stiffness in the range of 25D to 35D and the second adjustable bend segment has a stiffness in the range of 45D to 55D.

22. The catheter of claim 20 or 21, wherein the first adjustable bend section has a bend angle in a range of 0 ° to 90 ° and the second adjustable bend section has a bend angle in a range of-90 ° to 180 °.

23. The adjustable curve catheter of claim 22, wherein the control mechanism controls the drive mechanism to simultaneously drive the first adjustable curve segment and the second adjustable curve segment to curve to form a curve suitable for intervention in a left coronary artery or a right coronary artery; and the control mechanism controls the driving mechanism to independently drive the first adjustable bending section or the second adjustable bending section to bend so as to finely adjust the bending shape.