CN113521498A

CN113521498A - Control handle and bend-adjusting catheter

Info

Publication number: CN113521498A
Application number: CN202110949836.6A
Authority: CN
Inventors: 贾登强; 曹刚毅; 董成旭; 顾海军
Original assignee: Huanxin Medical Technology Suzhou Co ltd
Current assignee: Huanxin Medical Technology Suzhou Co ltd
Priority date: 2021-08-18
Filing date: 2021-08-18
Publication date: 2021-10-22

Abstract

The invention discloses a control handle and an adjustable bending catheter, wherein the control handle is used for controlling the rotation of a catheter body connected with the control handle and the bending of at least one adjustable bending section positioned at the far end of the catheter body, and comprises a fixing part, a steering control part and a rotary bending adjusting part. The fixed part is used for installing the adaptive interface to connect with external equipment; the steering control part is rotatably connected with the fixing part and is used for fixing the pipe body connected with the control handle and driving the pipe body to rotate relative to the fixing part; and the rotary bending adjusting part comprises a rotary control component and a driving adjusting component, the driving adjusting component is arranged in the steering control part and connected with the adjustable bending section, the rotary control component can be rotatably arranged on the steering control part and can control the driving adjusting component to move so as to change the bending degree of the adjustable bending section. The control handle can realize the bending and rotating functions of the far end of the tube body by operating the control handle outside the body in an interventional operation.

Description

Control handle and bend-adjusting catheter

Technical Field

The invention relates to the technical field of medical instruments, in particular to a control handle and a bending adjusting catheter.

Background

The catheter is used for human diaphragm puncture, cardiovascular intervention, peripheral vascular intervention, other human body lumen intervention or minimally invasive treatment, heart interatrial septum puncture, renal artery ablation, heart valve repair, tumor intervention embolization and other operations with bifurcated vessels and needing accurate positioning, and is an indispensable auxiliary tool in the operations of generally establishing a channel from the outside of a body to a target position in advance by using a pre-plastic catheter, so as to provide a channel for subsequent guide wires or other instruments to enter diagnosis and treatment. However, due to the difference in the personalized structure of the human body, the pre-plastic catheter cannot be completely adapted to all clinical requirements, and once the inserted catheter does not conform to the physiological structure of the patient, the catheter needs to be withdrawn and reinserted again, thereby increasing the operation time and possibly causing injury to the patient.

The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.

Disclosure of Invention

The invention aims to provide a control handle and a bending adjusting catheter, which can enable the head end of the catheter to be bent randomly within a pre-formed bending range through the control handle, and can realize that the distal end of the handle drives the catheter to rotate randomly together when the proximal end of the fixed handle is not rotated, so that the head end of the catheter can reach any position within a three-dimensional range.

To achieve the above object, an embodiment of the present invention provides a control handle for controlling rotation of a tubular body connected to the control handle and controlling bending of at least one adjustable bending section at a distal end of the tubular body, the control handle including a fixing portion, a steering control portion, and a rotation steering portion.

The fixed part is at least used for installing an adaptive interface to connect external equipment;

the steering control part is rotatably connected with the fixing part and is used for fixing a pipe body connected with the control handle and driving the pipe body to rotate relative to the fixing part; and

the rotary bending adjusting part comprises a rotary control component and a driving adjusting component, the driving adjusting component is arranged in the steering control part and connected with the bending adjustable section, the rotary control component can be rotatably arranged on the steering control part and can be controlled to move the driving adjusting component so as to change the bending degree of the bending adjustable section.

In one or more embodiments of the present invention, the steering control portion includes a first housing disposed to axially penetrate through the first housing, the first housing includes a first body portion and an extending portion extending from one side of the first body portion, a radial diameter of the extending portion is smaller than a radial diameter of the first body portion, and a first sliding groove is formed in the extending portion in an axial direction of the first housing.

In one or more embodiments of the present invention, a limiting groove is disposed at one end of the extending portion in the first body portion, the limiting groove and the first sliding groove are disposed in the same direction and are communicated, a plurality of supporting members are disposed at one end of the first body portion away from the extending portion, and a through hole adapted to a pipe body to be connected is disposed on each of the plurality of supporting members.

In one or more embodiments of the invention, the drive adjustment assembly includes a guide structure and a slide structure.

The guide structure is provided with a strip-shaped second body part and is configured in the first body part and the extension part;

the sliding structure is sleeved on the second body part of the guide structure, part of the sliding structure is limited in the first sliding groove, the sliding structure can slide along the first sliding groove in the axial direction of the second body part, and a thread structure is arranged on the surface of the sliding structure, protruding from the first sliding groove.

In one or more embodiments of the invention, the rotational control assembly includes a collar and a knob.

The retainer ring is fixedly sleeved on the extending part of the first shell;

the inner wall of the knob is provided with a thread structure matched with the surface of the sliding structure, the knob is rotatably sleeved on the clamping ring and is positioned at one end, close to the first body part, of the clamping ring, and the knob is in thread fit with the sliding structure and rotates by itself to drive the sliding structure to move.

In one or more embodiments of the present invention, a second sliding groove is formed in the second body portion of the guiding structure along the axial direction thereof, and the sliding structure is partially embedded in the second sliding groove and slides in the second sliding groove under the action of the knob.

In one or more embodiments of the present invention, the sliding structure includes a sliding body, a connecting body, and a wire crimping body.

The sliding body is sleeved on the second body part of the guide structure, and the sliding body is provided with a mounting hole;

the connecting body is arranged in the mounting hole and partially embedded in the second sliding groove, a mounting cavity is formed in the connecting body, the connecting body is driven by the sliding body to slide in the second sliding groove, and

the wire pressing body is arranged in the installation cavity, is fixedly connected with the adjustable bending section of the pipe body and controls the bending degree of the adjustable bending section of the pipe body by controlling the displacement of the wire pressing body.

In one or more embodiments of the present invention, the fixing portion includes a second housing and an adaptor.

The second shell is axially arranged in a through manner, and the second shell is sleeved on the extension part of the first shell and is in clearance fit with the retainer ring; and

the adaptor is axially provided with a first channel in a penetrating way and is provided with a second channel communicated with the first channel, the adaptor is arranged at the near end of the second shell and is partially embedded in the extension part of the first shell, the adaptor is sleeved at the near end of the guide structure, and a sealing ring is arranged between the adaptor and the guide structure; the near end of adaptor is provided with the adaptation interface, be provided with sealed the pad between adaptor with the adaptation interface.

In one or more embodiments of the present invention, a first limiting portion is convexly disposed in the extending portion of the first housing, a second limiting portion clamped with the first limiting portion is disposed at a distal end of the adaptor, and the fixing portion is axially fixed relative to the steering control portion by clamping the first limiting portion with the second limiting portion.

Another embodiment of the invention provides a bending adjusting catheter, which comprises a catheter body, a traction piece and any one of the control handles, wherein the catheter body is fixedly arranged in the control handle, the near end of the catheter body is flush with the near end of the guide structure, the far end of the catheter body is provided with an adjustable bending section, the far end of the traction piece is connected with the adjustable bending section, and the near end of the traction piece is connected with the driving adjusting assembly.

In one or more embodiments of the invention, the traction member includes a traction ring fixedly disposed at the distal end of the tube body, and a traction wire having one end connected to the traction ring and the other end connected to the drive adjustment assembly.

Compared with the prior art, the control handle and the adjustable-bending catheter control the adjustable-bending section of the catheter body to be bent at will in the pre-formed bending range by rotating the adjustable-bending part, and meanwhile, the steering control part is adjusted to drive the catheter body to rotate at any angle while the fixing part is kept not to rotate according to the rotatable connection between the steering control part and the fixing part, so that the head end of the catheter body can reach any position in a three-dimensional range, the curvature and the direction of the head end can be adjusted in real time according to different structures of a human body after the catheter body enters the human body, and the adjustable-bending catheter control handle and the adjustable-bending catheter control method can be suitable for operations with bifurcated blood vessels, which need to be accurately positioned and can meet different requirements on the far-end form of the catheter body, such as atrial septal puncture, renal artery ablation, heart valve repair, tumor interventional embolization and the like.

According to the control handle and the adjustable bent catheter, liquid sealing can be realized through the sealing ring and the sealing gasket in the control handle and the adjustable bent catheter, and when the distal end catheter body is inserted into a blood vessel of a human body, blood cannot leak from the proximal end of the control handle.

The control handle and the adjustable bent catheter can avoid the operator from manually operating the shape of the head end of the catheter before puncture positioning, and improve the precision and the positioning speed of the surgical positioning.

Drawings

FIG. 1 is a perspective view of a bendable catheter according to an embodiment of the present invention;

FIG. 2 is an exploded view of an adjustable bend conduit according to an embodiment of the present invention;

FIG. 3 is an axial cross-sectional view of an adjustable bend catheter in accordance with an embodiment of the invention;

FIG. 4 is a detail view of portion A of FIG. 3 in accordance with an embodiment of the present invention;

FIG. 5 is a schematic structural view of a tube according to an embodiment of the present invention;

FIGS. 6-8 are schematic views of different degrees of bending of a tube according to an embodiment of the present invention;

FIG. 9 is a first housing (half) configuration view of an embodiment of the present invention;

FIG. 10 is a perspective view of a guide structure according to an embodiment of the present invention;

fig. 11 is a perspective view of a slider (half) according to an embodiment of the present invention;

FIG. 12 is a perspective view of a connector according to an embodiment of the present invention;

fig. 13 is a perspective view of the wire presser according to the embodiment of the present invention;

fig. 14 is a perspective view of an adapter according to an embodiment of the present invention;

fig. 15 is a perspective view of the side branch seat according to the embodiment of the present invention.

Detailed Description

The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the specific embodiments.

Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.

To more clearly describe the structure of the steerable catheter, the terms "proximal" and "distal" are defined herein as relative positions, as are conventional 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.

As shown in FIG. 1, an embodiment of the present invention provides an adjustable bending catheter, which includes a catheter body 10, a pulling member, and a control handle 30. The tubular body 10 is partially secured within the control handle 30. A pulling member is provided between the tube 10 and the control handle 30, and the control handle 30 can control the bending of the distal end (head section or end) of the tube 10 through the pulling member.

The proximal end of the tubular body 10 and the control handle 30 can be fixedly connected together by means of adhesion, welding or integral molding. The distal end of the tube 10 extends out of the control handle 30, and the distal end of the tube 10 is provided with a pre-formed adjustable bending section.

The tubular body 10 may be a solid chamber, a hollow chamber, multiple chambers or a combination of the above-mentioned tubes. The tubular body 10 comprises, from the inside to the outside, an inner layer, a first braided layer, a wire-drawing layer, a reinforcing layer or a second braided layer, and an outer layer. The inner layer is made of smooth materials including PTFE, FEP, PEEK, PI and the like, the first and second braided layers or the reinforcing layer can be formed by braiding or winding stainless steel wires, nylon wires and glass fiber wires, and the outer layer can be nylon and PEBAX.

As shown in fig. 1 and 5, the tube 10 includes a head section 11, an adjustable bending section 12 and a connecting section 13 from the distal end to the proximal end. The head section 11 is provided with an X-ray developable marking ring 111 and a traction ring 21, and the developable marking ring 111 can be detected by X-ray during operation so as to be accurately positioned. The adjustable bending section 12 is composed of different hardness sections, the hardness change can be realized by the hardness of the outer layer material and the density of the reinforcing layer or the braided layer, and the different hardness sections can ensure that the adjustable bending section 12 of the pipe body 10 can be bent according to the pre-designed shape and angle when the traction piece pulls the head section 11 of the pipe body 10.

As shown in FIGS. 6-8, in one embodiment, the adjustable bending section 12 may be composed of 5-6 sections (121-125) with different hardness. The outer layer of material of the segments of different hardness may be made of Pebax2533, Pebax3533, Pebax4033, Pebax5533, Pebax6333 respectively from the distal end to the proximal end of the tube 10. In another embodiment, the hardness of the different hardness segments may also be achieved by varying the braid or fired density of the reinforcement or braid material, and the strength of the reinforcement or braid material. Fig. 6-8 show examples of different degrees of bending of the adjustable bend section 12 of the tubular body 10 achieved by varying the stiffness of each of the stiffness sections of the adjustable bend section 12 or the strength of the reinforcing or braided layer material.

As shown in fig. 5, the pulling member includes a pulling ring 21 and a pulling wire 22 disposed on the head section 11 of the tube 10, the pulling wire 22 is distributed in the pulling layer of the tube 10, one end of the pulling wire is connected to the pulling ring 21, and the other end of the pulling wire extends out of the surface of the tube 10 from the connecting section 13 of the tube 10 and extends into the control handle 30. The pull wire 22 may be one or more, typically metallic, wires that are threaded through the layers of the pull wire to control the positional movement of the head section 11 relative to the connector section 13 through the adjustable bend section 12. There is a certain strength between the traction ring 21 and the traction wire 22 and also itself.

The control handle 30 is used to control the rotation of the tubular body 10 connected to the control handle 30 and to control the bending of the bendable section 12 at the distal end of the tubular body 10.

As shown in fig. 1, the control handle 30 includes a fixing portion 31, a steering control portion 32, a turning portion 33, and an adapter interface 34. The fixing portion 31 is used to mount the adaptor interface 34 for connecting an external device. The steering control portion 32 is rotatably connected to the fixing portion 31, and the steering control portion 32 is used for fixing the tube 10 connected to the control handle 30 and driving the tube 10 to rotate relative to the fixing portion 31. The turning part 33 is disposed on the turning control part 32 and connected to the pulling wire 22 in the tube body 10, so that the degree of bending of the turning part can be changed by turning.

As shown in fig. 2, 3 and 9, the steering control portion 32 includes a first housing 321 axially disposed therethrough, and the first housing 321 is formed by fastening and mounting an upper housing and a lower housing through a locking pin 322, so as to facilitate assembly or disassembly. The first housing 321 is generally configured as a cylindrical structure, which includes a first head portion 3211, a first body portion 3212, and an extension portion 3213, which are integrally formed.

The first head portion 3211 is a cone structure, and a through hole for accommodating the connecting section 13 of the pipe body 10 is formed in an axial middle portion of the first head portion.

As shown in fig. 9, a plurality of supporting members 32121 are disposed at a connecting end of the first body 3212 and the first head 3211, wherein the upper shell and the lower shell of the first shell 321 are both provided with the supporting members 32121, each supporting member 32121 is provided with a semi-arc through hole adapted to the pipe 10, and the supporting members on the upper shell and the lower shell are disposed in a staggered manner, as shown in fig. 3. The through holes of the first body portion 3212 and the through holes of the first head portion 3211 are used to fix and support the tube 10, so as to improve the stability of the tube 10 disposed in the control handle 30, and the supports 32121 staggered on the upper housing and the lower housing further enhance the stability of the tube 10.

In the first body portion 3212, a limiting groove 32122 is disposed at a connection end with the extending portion 3213, and the limiting groove 32122 is configured to accommodate a portion of components in the rotation adjustment portion 33.

In the first body portion 3212, a T-shaped groove 32123 is disposed between the supporting member 32121 and the limiting groove 32122, and a head end of the T-shaped groove 32123 is communicated with the limiting groove 32122 for accommodating and fixing a part of components in the rotating bending adjusting portion 33.

The extending portion 3213 is formed by extending from a side of the first body portion 3212 away from the first head portion 3211, and a radial diameter of the extending portion 3213 is smaller than a radial diameter of the first body portion 3211, so that after the fixing portion 31 is installed, a surface of the fixing portion 31 is flush with a surface of the first body portion 3212, which is convenient for appearance. The extending portion 3213 is provided with a first sliding groove 32131 along an axial direction of the first housing 321, the first sliding groove 32131 radially penetrates the extending portion 3213, and is axially communicated with the limiting groove 32122 for providing a moving track for a part of components in the rotating turning portion 33. An annular first limiting portion 32132 is protruded from an inner portion of a proximal end (an end away from the first body portion) of the extending portion 3213, and the first limiting portion 32132 is used for relatively fixing the fixing portion 31 and the steering control portion 32 in the axial direction.

As shown in fig. 2 and 3, the rotary turning part 33 includes a rotation control component 331 and a driving adjustment component 332. The driving adjustment assembly 332 is disposed in the first housing 321 of the steering control portion 32 and connected to the traction ring 21 of the head section of the pipe body 10. The rotation control assembly 332 is rotatably disposed on the steering control portion 32 and can control the driving adjustment assembly 331 to move so as to change the bending degree of the bendable section 12 of the pipe 10.

The actuation adjustment assembly 332 includes a guide structure 3321 and a sliding structure 3322.

As shown in fig. 10, the guiding structure 3321 includes a second head portion 33211, a second body portion 33212 and a tail portion 33213 which are integrally formed. The guide 3321 is fixedly disposed in the first housing 321.

The second head portion 33211 is also axially provided with a through hole for accommodating the tube 10, two side surfaces of the second head portion 33211 are provided with symmetrical T-shaped limiting portions 332111, the T-shaped limiting portion 332111 is adapted to the T-shaped groove 32123 in the first body portion 3212, and when the guiding structure 3321 is disposed in the first housing 321, the T-shaped limiting portion 332111 and the T-shaped groove 32123 can fix fibers of the two.

The second body 33212 is configured as a strip structure, and the second body 33212 has a second sliding slot 332121 along its axial direction. The second slide groove 332121 communicates with the through hole of the second head 33211. The second slide groove 332121 has a depth for accommodating the tube 10 and also for accommodating a part of the sliding structure 3322. The outer surface of the second body portion 33212 is symmetrically provided with guide bars 332122 for guiding the sliding structure 3322 to slide.

The tail portion 33213 has a through hole axially formed therethrough, and the tail portion 33213 has an annular protrusion 332131, and the annular protrusion 332131 is used to fix the sealing ring. The proximal end of the body 10 is flush with the proximal end of the tail 33213 of the guide structure 3321 and is fixedly attached to the guide structure 3321 by bonding, welding or integral molding.

As shown in fig. 2, the sliding structure 3322 is disposed on the second body 33212 of the guiding structure 3321, and a portion of the sliding structure is confined in the first sliding slot 32131 and another portion of the sliding structure is confined in the second sliding slot 332121. The sliding structure 3322 can slide along the first sliding groove 32131 in the axial direction of the second body 33212. The surface of the sliding structure 3322 protruding from the first sliding slot 32131 is provided with a thread structure.

The sliding structure 3322 includes a sliding body 33221, a connecting body 33222 and a pressing line body 33223.

As shown in fig. 11, the sliding body 33221 includes an upper portion and a lower portion, and the two portions are engaged to form the sliding body 33221. The sliding body 33221 is sleeved on the second body 33212 of the guiding structure 3321, the sliding body 33221 is provided with a mounting hole 332211 (half mounting holes are respectively formed in the upper part and the lower part of the sliding body 33221), a guiding groove 332212 matched with the guiding strip 332122 of the second body 33212 is formed in the sliding body 33221, and the stability of the sliding body 33221 during moving is further improved due to the matching of the guiding groove 332212 and the guiding strip 332122. The surface of the sliding body 33221 is provided with the above-mentioned thread structure.

As shown in fig. 12, the connector 33222 is disposed in the mounting hole 332211, the connector 33222 has a stopper plate 332221 and two sliding legs 332222 extending from one side of the stopper plate 332221, and the area between the two sliding legs 332222 is configured to be arc-shaped for accommodating the pipe body 10. The width of the limit plate 332221 is greater than that of the second slide groove 332121, and the two slide legs 332222 are embedded in the second slide groove 332121. The connector 33222 has a mounting cavity 332223, and the connector 33222 has a first cable pulling hole 332224 along the axial direction of the tube 10. The connecting body 33222 slides in the second sliding slot 332121 under the driving of the sliding body 33221.

As shown in fig. 13, the wire pressing body 33223 is disposed in the mounting cavity 332223, the wire pressing body 33223 is also provided with a second wire pulling hole 332231, the pulling wire 22 passes through the first wire pulling hole 332224 and the second wire pulling hole 332231, and is pressed into the wire pressing body 33223 by the jackscrew, so as to be fixedly connected to the head section 11 of the tube body 10, and the bending degree of the bendable section 12 of the tube body 10 is controlled by controlling the displacement thereof.

As shown in fig. 2, in order to control the distance of the sliding structure 3322 on the guiding structure 3321, stoppers 3323 are disposed at two ends of the second body 33212 of the guiding structure 3321.

The rotation control assembly 331 includes a collar 3311 and a knob 3312.

The collar 3311 is fixedly secured to the extension portion 3213 of the first housing 321 and spaced apart from the first body portion 3212 of the first housing 321 for receiving the knob 3312.

The inner wall of the knob 3312 is provided with a thread structure adapted to the surface of the sliding body 33221, the knob 3312 is rotatably sleeved on the clamping ring 3311 and located at one end of the clamping ring 3311 close to the first body portion 3212, the knob 3212 is in thread fit with the sliding structure 3322, and the rotation of the knob 3312 drives the sliding structure 3322 to move, thereby controlling the bending of the adjustable bending section 12 of the tube 10.

As shown in fig. 2, 3 and 4, the fixing portion 31 includes a second housing 311 and an adaptor 312.

The second housing 311 is axially disposed through, and the second housing 311 is sleeved on the extending portion 3213 of the first housing 321 and is in clearance fit with the collar 3311, so that the first housing 321 and the rotation control assembly 331 do not affect the second housing 311 when rotating.

As shown in fig. 4 and 14, the adaptor 312 has a first passage 3121 axially penetrating therethrough and a second passage 3122 communicating with the first passage 3121, and the adaptor 312 is fixedly disposed at the proximal end of the second housing 311 by gluing or the like and is partially embedded in the extending portion 3213 of the first housing 321 (gap embedded). The adaptor 312 is sleeved on the annular boss 332131 at the tail of the guide structure 3321 and a sealing ring is arranged between the adaptor and the annular boss 332131 at the tail of the guide structure 3321.

In an embodiment, the distal end of the adaptor 312 is provided with an annular second limit portion 3123 engaged with the first limit portion 32132, the fixing portion 31 is axially fixed relative to the steering control portion 32 by engaging the first limit portion 32132 with the second limit portion 3123, the fixing portion 31 of the control handle 30 is also fixed and does not rotate, and when the distal steering control portion 32 and the rotation regulating portion 33 drive the tube 10 to rotate freely, the fixing portion 31 and the first housing 321 will not fall off. The adapter piece 312 is provided with an adapter interface 34 at its proximal end, a sealing gasket 35 is provided between the adapter piece 312 and the adapter interface 34, and the sealing gasket 35 is a water-blocking sealing gasket, so that when the tube 10 is inserted into a blood vessel of a human body, blood leakage at the proximal end of the control handle 30 is avoided.

As shown in fig. 2 and 15, the adapter 34 includes a sidebranch switch valve 341, an extension tube 342, a sidebranch seat 343, and a luer fitting 344. The adaptor 312 is engaged with the side branch seat 343, and a sealing gasket 35 is disposed between the adaptor 312 and the side branch seat 343. The side branch seat 343 is provided with a central hole 3431, the central hole 3431 is connected with the luer fitting 344, the extension tube 342 is bonded with the second passage 3122 of the adaptor 312, and the other end of the extension tube 342 is bonded with the side branch switch valve 341.

The adjustable bent conduit of the invention has the following installation method:

the connecting section 13 of the tube 10 is inserted into the through hole of the guiding structure 3321 and the second sliding groove 332121 and is fixedly connected by means of bonding, welding, etc., and the proximal end of the connecting section 13 of the tube 10 is flush with the tail end of the guiding structure 3321.

The adaptor 312 is fittingly sleeved on the tail end of the guiding structure 3321, and a sealing ring is disposed at the joint for sealing. The adaptor 312 is clamped with the side branch seat 343 in a matching manner, and a sealing gasket 35 is arranged in the middle for sealing. The central aperture 3431 of the side branch seat 343 is connected to the luer fitting 344, and the second passage 3122 of the adaptor 312 is bonded to the extension tube 342. The extension pipe 342 is bonded to the side branch switching valve 341.

The two terminal screws are screwed into the crimp 33223 and fit together into the mounting cavity 332223 of the connector 33222. Upper and lower sliders 33221 are fitted into guide structure 3321, and connecting body 33222 is fitted into mounting hole 332211 of upper and lower sliders 33221 to form sliding structure 3322.

The proximal end of the pulling wire 22 of the tube 10 is inserted through the first and second pulling wire holes (332224, 332234) of the sliding structure 3322, the position thereof is adjusted, the pulling wire is pressed and fixed by a jackscrew, and two front and rear stoppers 3323 are engaged with the second body portion 33212 of the guiding structure 3321 at the front and rear positions of the sliding structure 3322 on the guiding structure 3321.

The upper and lower portions of the first housing 321 are snapped into the installed guide 3321 and secured by the snap 322. The collar 3311 and the sealing ring are sleeved on the extending portion 3213 of the first housing 321, sleeved on the knob 3312 and screwed into the thread of the sliding body 33221, and finally sleeved on the second housing 311 to fix the proximal end of the second housing 311 and the adaptor 312, thereby completing the assembly of the adjustable bending catheter.

The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims

1. A control handle for manipulating rotation of a tubular body connected to said control handle and for manipulating bending of at least one adjustable bend segment at a distal end of said tubular body, said control handle comprising:

a fixing part at least for installing an adapting interface to connect an external device;

the steering control part is rotatably connected with the fixing part and is used for fixing the pipe body connected with the control handle and driving the pipe body to rotate relative to the fixing part; and

the rotary bending adjusting part comprises a rotary control component and a driving adjusting component, the driving adjusting component is arranged in the steering control part and connected with the bending adjustable section, the rotary control component can be rotatably arranged on the steering control part and can be controlled to drive the adjusting component to move so as to change the bending degree of the bending adjustable section.

2. The control handle according to claim 1, wherein the steering control portion includes a first housing disposed axially therethrough, the first housing includes a first body portion and an extending portion extending from one side of the first body portion, a radial diameter of the extending portion is smaller than a radial diameter of the first body portion, and a first sliding groove is formed in the extending portion along an axial direction of the first housing.

3. The control handle of claim 2, wherein said drive adjustment assembly comprises:

a guide structure having a strip-shaped second body portion, the guide structure being disposed in the first body portion and the extension portion; and

the sliding structure is sleeved on the second body part of the guide structure, part of the sliding structure is limited in the first sliding groove, the sliding structure can slide in the axial direction of the second body part along the first sliding groove, and a thread structure is arranged on the surface of the sliding structure, protruding out of the first sliding groove.

4. The control handle of claim 3, wherein the rotational control assembly comprises:

the clamping ring is fixedly sleeved on the extending part of the first shell; and

the knob is rotatably sleeved on the clamping ring and is positioned at one end, close to the first body part, of the clamping ring, and the knob is in threaded fit with the sliding structure and rotates to drive the sliding structure to move.

5. The control handle according to claim 4, wherein the second body of the guiding structure has a second sliding slot formed along an axial direction thereof, and the sliding structure is partially embedded in the second sliding slot and slides in the second sliding slot under the action of the knob.

6. The control handle of claim 5, wherein said sliding structure comprises:

the sliding body is sleeved on the second body part of the guide structure and is provided with a mounting hole;

a connecting body disposed in the mounting hole and partially embedded in the second sliding groove, the connecting body having a mounting cavity, the connecting body being driven by the sliding body to slide in the second sliding groove, and

and the wire pressing body is arranged in the installation cavity, is fixedly connected with the adjustable bending section of the pipe body and controls the bending degree of the adjustable bending section of the pipe body by controlling the displacement of the wire pressing body.

7. The control handle of claim 5, wherein said fixed portion comprises:

the adapter is axially provided with a first channel in a penetrating way and is provided with a second channel communicated with the first channel, the adapter is arranged at the near end of the second shell and is partially embedded in the extension part of the first shell, the adapter is sleeved at the near end of the guide structure, and a sealing ring is arranged between the adapter and the guide structure; the near end of adaptor is provided with the adaptation interface, be provided with sealed the pad between adaptor with the adaptation interface.

8. The control handle according to claim 7, wherein a first limiting portion is provided in the extending portion of the first housing in a protruding manner, a second limiting portion is provided at a distal end of the adaptor, the second limiting portion is engaged with the first limiting portion, and the fixing portion is axially fixed relative to the steering control portion by engaging the first limiting portion with the second limiting portion.

9. A bending adjusting catheter is characterized by comprising a catheter body, a traction piece and a control handle according to any one of claims 3 to 8, wherein the catheter body is fixedly arranged in the control handle, the near end of the catheter body is flush with the near end of a guide structure, an adjustable bending section is arranged at the far end of the catheter body, the far end of the traction piece is connected with the adjustable bending section, and the near end of the traction piece is connected with a driving adjusting assembly.

10. The bend-adjusting catheter of claim 9, wherein the pulling member comprises a pulling ring and a pulling wire, the pulling ring is fixedly disposed at the distal end of the catheter body, one end of the pulling wire is connected to the pulling ring, and the other end of the pulling wire is connected to the driving adjustment assembly.