CN117860179A

CN117860179A - Multi-forceps endoscope and surgical system

Info

Publication number: CN117860179A
Application number: CN202410264354.0A
Authority: CN
Inventors: 谢天灵; 徐科端
Original assignee: Shenzhen Kesimingde Medical Technology Co ltd
Current assignee: Shenzhen Kesimingde Medical Technology Co ltd
Priority date: 2024-03-08
Filing date: 2024-03-08
Publication date: 2024-04-12
Anticipated expiration: 2044-03-08

Abstract

The invention provides a multi-channel endoscope and an operation system, and relates to the technical field of endoscopes. The multi-channel endoscope comprises a single-channel endoscope and at least one external channel, wherein the external channel is arranged on an insertion tube; the external forceps channel comprises a first sleeve piece and a second sleeve piece, and the single-channel endoscope comprises an insertion tube; the first sleeve piece is connected with the insertion tube and is provided with a first cavity, and the first sleeve piece and the first cavity are both arranged in an extending way along the insertion tube; the second sleeve member has a second cavity, the second sleeve member is capable of sliding through the first cavity, and the second sleeve member has a bending portion capable of driving one end of the second sleeve member, which is close to the distal end portion of the insertion tube, to bend. The multi-channel endoscope provided by the invention can realize that a plurality of channels can be independently operated respectively, reduce the operation difficulty, effectively reduce the operation difficulty and improve the operation efficiency.

Description

Multi-forceps endoscope and surgical system

Technical Field

The invention relates to the technical field of endoscope equipment, in particular to a multi-channel endoscope and an operation system.

Background

The multi-track endoscope has two tracks, although one more track than a single track endoscope may be used to insert surgical instruments for surgical treatment. However, since the two jaws cannot be individually bent due to the restriction of the outer diameter of the insertion tube of the endoscope, that is, the surgical instrument must be operated together with the head end of the endoscope, and cannot be individually operated, there is a problem in that the operation is inconvenient, which is disadvantageous in the operation.

Disclosure of Invention

In view of the above, the invention aims to overcome the defects in the prior art, and provides a multi-channel endoscope which can realize that a plurality of channels can be independently operated respectively, reduce the operation difficulty, effectively reduce the operation difficulty and improve the operation efficiency;

in addition, a surgical system using the multi-channel endoscope is provided.

The invention provides the following technical scheme:

according to a first aspect of the present disclosure, there is provided a multi-jaw endoscope comprising:

a single channel endoscope, the single channel endoscope comprising an insertion tube;

at least one external forceps channel, wherein the external forceps channel is arranged on the insertion tube; wherein the method comprises the steps of

The external clamp path comprises:

the first sleeve part is connected to the insertion tube and is provided with a first cavity, and the first sleeve part and the first cavity are both arranged in an extending mode along the extending direction of the insertion tube; and

the second sleeve member is provided with a second cavity, the second sleeve member can be slidably arranged in the first cavity in a penetrating mode, the second sleeve member is provided with a bending portion, and the bending portion can drive one end, close to the front end portion of the insertion tube, of the second sleeve member to bend.

Further, the second sleeve member includes:

a first sheath having a first curved section, the first sheath penetrating the first lumen;

the first supporting piece is at least partially arranged on the first bending section and extends along the extending direction of the first sheath tube; wherein the first support is configured to at least enable a tensile modulus of the first curved section to be greater than a flexural modulus;

the first lining pipe penetrates through the first bending section, and one end, close to the first bending section, of the first lining pipe is connected with the first bending section; the first lining pipe is provided with a plurality of first notches, the first notches are arranged at intervals along the extending direction of the first lining pipe, and the first notches are arranged along the circumferential extension of the first lining pipe; and the side of the first lining pipe, which is close to the first supporting piece, is provided with the first notch;

a plurality of first steering wires connected to the first liner tube, the plurality of first steering wires configured to drive the first liner tube and the first curved section to curve; wherein the first liner tube, the first bend section, and the first steering wire comprise the bend.

Further, the first sleeve member includes:

and the second sheath tube is detachably connected with the insertion tube, and is provided with a second main cavity channel which forms the first cavity channel.

Further, the first sleeve member further includes:

a second support member, the second sheath tube having a second bending section and a second infusion section, the insertion tube having a distal end portion and an operation portion, the second infusion section being adjacent to the operation portion, the second infusion section being connected to the insertion tube, the second support member being at least partially disposed in the second bending section, and the second support member being disposed to extend in an extending direction of the second sheath tube; wherein the second support is configured to at least enable a tensile modulus of the second curved section to be greater than a curved modulus;

the second lining pipe penetrates through the second bending section, and one end, close to the second bending section, of the second lining pipe is connected with the second bending section; the second lining pipe is provided with a plurality of second notches, the second notches are arranged at intervals along the extending direction of the second lining pipe, and the second notches extend along the circumference of the second lining pipe; and the side of the second lining pipe, which is close to the second supporting piece, is provided with the second notch; wherein the first sleeve member is slidably inserted into the second liner tube;

The second liner tube comprises a plurality of second control wires, a plurality of second control wires and a second liner tube, wherein the second control wires are connected with the second liner tube and are configured to drive the second liner tube and the second bending section to bend.

Further, the first notch and the second notch are arranged in an opposite mode.

Further, the first liner tube has a first extension section coaxially connected with the first bending section, and the first extension section is provided with a third notch configured to enable elastic bending of the second extension section.

Further, the second liner tube has a second extension section coaxially connected with the second bending section, the second extension section being provided with a fourth notch configured to enable elastic bending of the second extension section.

Further, the third notch and the fourth notch are both provided as helical grooves.

Further, the first lining pipe is further provided with a plurality of fifth notches, the fifth notches are arranged at intervals along the extending direction of the first lining pipe, and the fifth notches extend along the circumferential direction of the first lining pipe;

The first notch and the fifth notch are respectively positioned on two opposite side walls of the first lining pipe, a first area and a second area are respectively arranged at two ends of the first lining pipe, the first notch is positioned in the first area, and the fifth notch is positioned in the second area.

Further, the second lining pipe is further provided with a plurality of sixth notches, the plurality of sixth notches are arranged at intervals along the extending direction of the second lining pipe, and the sixth notches extend along the circumferential direction of the second lining pipe;

the second notch and the sixth notch are respectively positioned on two side walls of the second lining pipe, which are opposite to each other, and the two ends of the second lining pipe are respectively provided with a third area and a fourth area, the second notch is positioned in the third area, and the sixth notch is positioned in the fourth area.

Further, the number of the first control wires is one, the first sheath tube is provided with a first main cavity channel and a first auxiliary cavity channel, the first lining tube is arranged in the first main cavity channel in a penetrating mode, the first control wires can be elastically deformed, one ends of the first control wires are connected with the first lining tube, and the first control wires are arranged in the first auxiliary cavity channel in a penetrating mode;

Wherein the first secondary lumen is configured to limit the range of oscillation of the first steering wire within the cross-section of the first sheath such that the first steering wire is switchable between at least a pulling force and a pushing force applied to bend the first bending section.

Further, the number of the second control wires is one, the second sheath tube is provided with a second main cavity channel and a second auxiliary cavity channel, the second lining tube is arranged in the second main cavity channel in a penetrating mode, the second control wires can elastically deform, one ends of the second control wires are connected with the second lining tube, and the second control wires are arranged in the second auxiliary cavity channel in a penetrating mode;

wherein the second secondary lumen is configured to limit the range of oscillation of the second steering wire within the cross-section of the second sheath such that the second steering wire is switchable between at least a pulling force and a pushing force applied to bend the second bending section.

Further, the first supporting piece is arranged into a strip-shaped structure and is installed in the side wall of the first sheath tube;

the second support piece is arranged in a strip-shaped structure, and is installed in the side wall of the second sheath tube.

According to a second aspect of the present disclosure, there is provided a surgical system comprising the multi-jaw endoscope.

Embodiments of the present invention have the following advantages:

by adopting the multi-channel endoscope provided by the invention, the first sleeve pipe piece of the external channel is connected with the insertion pipe of the single-channel endoscope, the second sleeve pipe piece with the bending part is penetrated in the first cavity channel of the first sleeve pipe piece, and the second sleeve pipe piece can rotate and slide in the first cavity channel, so that the second sleeve pipe piece can be controlled to enter and exit the first cavity channel, wherein the second cavity channel is used for penetrating surgical instruments; when the bending part moves out of the first cavity, the bending part can drive the part of the second sleeve part positioned out of the first cavity to bend so as to adjust the bending angle of the working end of the surgical instrument, and the position of the working end of the surgical instrument can be adjusted by adjusting the length of the second sleeve part extending out of the first cavity. In addition, by controlling the rotation of the second cannula member within the first lumen, the direction of curvature of the working end of the surgical instrument can be adjusted. Therefore, the device shell adopts a plurality of external pincers to form a plurality of pincers by matching with the single-channel endoscope, can realize the bending angle, the bending direction and the position of the second sleeve pipe fitting of each external pincers independently, and then matches with the insertion pipe of the single-channel endoscope, can realize that the plurality of pincers can be independently operated respectively, reduce the operation difficulty, can effectively reduce the operation difficulty and improve the operation efficiency.

In addition, the present invention also relates to a surgical system, and since the multi-jaw endoscope has the technical effects described above, the surgical system including the multi-jaw endoscope should have the same technical effects, and will not be described herein.

In order to make the above objects, features and advantages of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view showing a view of a multi-channel endoscope according to an embodiment of the present invention;

FIG. 2 is a schematic view showing another view of a multi-jaw endoscope according to an embodiment of the present invention;

FIG. 3 is a schematic view showing a first embodiment of a first liner tube of a multi-jaw endoscope according to a first embodiment of the present invention;

FIG. 4 is a schematic view showing a second embodiment of a first liner tube of a multi-jaw endoscope according to the first embodiment of the present invention;

FIG. 5 is a schematic view showing a third embodiment of a first liner tube of a multi-jaw endoscope according to the first embodiment of the present invention;

FIG. 6 is a schematic view showing a structure of a multi-jaw endoscope according to a second embodiment of the present invention;

FIG. 7 is a schematic view showing the structure of a first sheath tube and a first lining tube in a second sheath tube member of a multi-jaw endoscope according to a first embodiment of the present invention;

FIG. 8 is a schematic view showing the assembly of a first sleeve member and a second sleeve member of a multi-jaw endoscope according to a first embodiment of the present invention;

FIG. 9 is a schematic view showing a structure of a second sleeve member of a multi-channel endoscope according to an embodiment of the present invention;

FIG. 10 is a schematic view showing another view of a second sleeve member of a multi-channel endoscope according to an embodiment of the present invention;

FIG. 11 is a schematic view showing a three-dimensional structure of a primary sheath according to an embodiment of the present invention;

FIG. 12 is a schematic view showing the structure of a primary sheath according to an embodiment of the present invention;

FIG. 13 shows a schematic structural view of a cross section of a first curved section of a primary sheath provided by an embodiment of the present invention;

FIG. 14 shows a schematic structural view of a cross section of a first infusion segment of a primary sheath provided by an embodiment of the present invention;

fig. 15 shows an assembly schematic of a first sleeve member and a second sleeve member provided by an embodiment of the present invention.

Description of main reference numerals:

100-primary sheath; 110-a first main channel; 120-a first infusion segment; 130-a first curved section; 140-a first secondary channel; 200-a first support; 210-a first auxiliary channel; 300-a first liner tube; 310-a first notch; 320-a third notch; 330-a first region; 340-a first extension; 400-a first steering wire; 500-content; 600-a second sleeve member; 700-a first sleeve member; 800-single track endoscope; 810-inserting a tube; 900-a secondary sheath; 910-a second curved section; 920-a second infusion segment; 1000-a second liner tube; 1100-a second notch; 1200-third region; 1300-second extension.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

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 to which this application belongs. The terminology used in the description of the templates herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

In the related art, with the progress of medical science and technology and the improvement of health consciousness, medical treatment appliances are gradually perfected and complete, and the medical treatment means are enriched. The development of medical examination and operation makes non-invasive or minimally invasive treatment gradually replace part of traditional large-wound operation, greatly shortens the recovery period and human body trauma, and gradually enriches surgical instruments so that modern medical means are increasingly widely used. However, as the procedure progresses, some conventional instruments have not been adequate in some complex procedures, such as single-track endoscope 800, and the advent of multi-track endoscopes has evolved.

The multi-jaw endoscope has two jaws, that is, the insertion tube 810 of the multi-jaw endoscope has two jaws, and although one more jaw than the single-jaw endoscope 800 is available to insert surgical instruments for surgical treatment, the two jaws cannot be individually operated in a bending manner due to the limitation of the outer diameter of the insertion tube 810, that is, the surgical instruments must be operated together with the head end of the endoscope, which is inconvenient to operate, and is disadvantageous to the operation.

In order to solve the above technical problems, according to a first aspect of the present disclosure, as shown in fig. 1 and 2, there is provided a multi-jaw endoscope including a single-channel endoscope including an insertion tube 810; at least one external jaw mounted to the insertion tube 810; the external forceps channel comprises a first sleeve member 700 and a second sleeve member 600, wherein the first sleeve member 700 is connected to the insertion tube 810, the first sleeve member 700 is provided with a first channel, and the first sleeve member 700 and the first channel are both arranged in an extending way along the extending direction of the insertion tube 810; the second sleeve member 600 has a second channel, the second sleeve member 600 can be slidably disposed through the first channel, and the second sleeve member 600 has a bending portion capable of driving one end of the second sleeve member 600 near the distal end portion of the insertion tube 810 to bend.

In this embodiment, the multi-track endoscope has one external track, and in other embodiments, two external tracks, three external tracks, four external tracks, and the like may be provided, which is not limited herein. It should be noted that, whether one external pincer channel or other external pincer channels, the structure and principle are the same, and only the number of external pincer channels is increased or decreased.

It is to be easily understood that the insertion tube 810 of the single channel endoscope has a distal end portion and an operation portion, and the operation portion is connected to an operation handle, whereby the bending direction and bending angle of the insertion tube 810 are controlled by the operation portion. It should be noted that, how to control the bending direction and the bending angle of the insertion tube 810 is the prior art, and will not be described again.

Generally, in the conventional endoscope scheme, the portion of the endoscope inserted into the patient is mainly divided into three layers, which are sequentially from outside to inside: isolation layer, snake bone structure to control bending of the endoscope, content 500. The snake bone structure is a mechanism formed by a plurality of sections of annular hinges, a large gap is reserved between every two adjacent sections, bending of the snake bone structure is controlled by ropes, and the snake bone structure can realize two-way or four-way bending.

Illustratively, the first sleeve member 700 is mounted on a distal end portion of the insertion tube 810, and it should be noted that the insertion tube 810 includes a distal end portion, a distal end bending portion, an insertion portion, and an operation portion, which are sequentially connected, wherein the distal end portion is made of a hard material, also referred to as a distal end hard portion, which does not undergo bending deformation. Obviously, the first sleeve member 700 is mounted to the distal end portion so as to avoid the first sleeve member 700 interfering with the bending of the distal end bending portion. Of course, since the distal end portion is connected to the insertion portion through the distal end bending portion, the first sleeve member 700 is mounted on the distal end portion, so that the first sleeve member 700 and the second sleeve member 600 can be synchronously bent in the process of being inserted into the human body cavity by using the distal end portion, thereby facilitating the insertion operation.

Optionally, the tip portion is adhesively secured to the first sleeve member 700; alternatively, in other embodiments, the distal end portion is connected to the first sleeve member 700 by a connector, where the connector is a clip, and the clip and the distal end portion are locked and fixed.

Illustratively, by sizing the first channel, the second sleeve member 600 is capable of both sliding along the direction of extension of the first channel and rotating circumferentially within the first channel; wherein the shape of the first channel is set to be circular, elliptical, polygonal, etc., and the shape of the first channel is not particularly limited herein.

It should be noted that, as shown in fig. 8, by controlling the second sleeve member 600 to move along the extending direction of the first channel, the length of the second sleeve member 600 extending out of the first channel may be controlled, and the bending portion may be matched to control the second sleeve member 600 to drive the bending portion of the second sleeve member 600 extending out of the first channel, that is, the distance between the end portion of the second sleeve member 600 extending out of the first channel and the front end portion of the insertion tube 810 may be adjusted. Since the contents 500 are inserted into the second channel, it is apparent that the distance between the end of the contents 500 and the distal end of the insertion tube 810 can be adjusted, and thus the control of the position distance between the contents 500 inserted into the insertion tube 810 and the contents 500 inserted into the second channel can be achieved. Wherein the content 500 may be an endoscopic forceps or the like.

In addition, by controlling the rotation of the second cannula member 600, the bending direction of the second cannula member 600 can be controlled to allow for multi-position, multi-directional operation, which is suitable for more surgical needs.

Illustratively, a lubricant is disposed on the inner wall of the first channel or the outer wall of the second sleeve member 600 to reduce the coefficient of friction therebetween. Optionally, the lubricant is a solid lubricant such as molybdenum disulfide, a fluid lubricant such as medical silicone oil, and a mixed lubricant such as molybdenum disulfide and adhesive suspension.

By connecting the first sleeve member 700 of the external forceps channel with the insertion tube 810 of the single-channel endoscope and penetrating the second sleeve member 600 with the bending part into the first cavity channel of the first sleeve member 700, and the second sleeve member 600 can rotate and slide in the first cavity channel, the control of the second sleeve member 600 to enter and exit the first cavity channel can be realized, wherein the second cavity channel is used for penetrating surgical instruments; when the bending part moves out of the first cavity, the bending part can drive the part of the second sleeve member 600 positioned out of the first cavity to bend so as to adjust the bending angle of the working end of the surgical instrument, and the position of the working end of the surgical instrument can be adjusted by adjusting the length of the second sleeve member 600 extending out of the first cavity. In addition, by controlling the rotation of the second cannula member 600 within the first lumen, the direction of bending of the working end of the surgical instrument can be adjusted.

Therefore, the device adopts a plurality of external forceps to form a plurality of forceps channels by matching with the single-channel endoscope, can realize the independent control of the bending angle, the bending direction and the position of the second sleeve pipe fitting 600 of each external forceps channel, further matches with the insertion pipe 810 of the single-channel endoscope, can realize the independent operation of the double forceps channels respectively, reduces the operation difficulty, and can effectively reduce the operation difficulty and improve the operation efficiency.

Of course, in other embodiments, the first sleeve member may be used as an external jaw and the second sleeve member may be an adjustable bending device having an active bending system.

As shown in fig. 7, 9 and 10, the second sleeve member 600 includes the first sheath tube 100, the first support member 200, the first lining tube 300 and the plurality of first manipulation wires 400, the first sheath tube 100 has the first bending section 130, and the first sheath tube 100 is inserted into the first lumen. The first supporting member 200 is at least partially disposed on the first bending section 130, and the first supporting member 200 is disposed along the extending direction of the first sheath 100; wherein the first support 200 is configured to at least enable a tensile modulus of the first curved section 130 to be greater than a flexural modulus. The first liner tube 300 is inserted through the first curved section 130, and one end of the first liner tube 300 adjacent to the first curved section 130 is connected to the first curved section 130. The first lining tube 300 is provided with a plurality of first notches 310, the first notches 310 are arranged at intervals along the extending direction of the first lining tube 300, and the first notches 310 are arranged along the circumferential direction of the first lining tube 300; and the side of the first lining tube 300 adjacent to the first support 200 has the first notch 310. A plurality of first steering wires 400 are connected to the first liner tube 300, the plurality of first steering wires 400 being configured to drive the first liner tube 300 and the first bending section 130 to bend; wherein the first liner tube 300, the first bending section 130 and the first steering wire 400 constitute a bend.

For example, the number of the first manipulation wires 400 is two, and as with the interventional catheters on the market, the distal end of the interventional catheter is bendable, and one or more pull wires are usually fixed at the distal end of the interventional catheter and extend to the proximal end of the interventional catheter, so that the bending deformation of the interventional catheter can be controlled through the pull wires, thereby increasing the applicability of the interventional catheter. That is, when in use, the two first manipulation wires 400 are pulled by the manipulation handles, so that the first bending section connected to the first manipulation wires 400 can be bent bi-directionally.

The first sheath 100 has a distal end and a proximal end, the distal end is close to the distal end of the insertion tube 810, the proximal end is far away from the distal end, the portion of the first sheath 100 located at the distal end is the first curved section 130, the portion of the first sheath 100 located at the proximal end is the first infusion section 120, wherein the distal end of the first sheath 100, i.e., the end capable of being inserted into the human body, is connected to the endoscope operating handle.

In this application, as shown in fig. 7, the first liner tube 300 is inserted into the first bending section 130, one side of the first liner tube 300 is provided with a plurality of first notches 310, and the plurality of first notches 310 are spaced apart along the extending direction (i.e., the axial direction) of the first liner tube 300. Wherein the side of the first liner tube 300 where the first notch 310 is provided is adjacent to the first support 200, i.e. the first notch 310 and the first support 200 are located on the same side of the first sheath tube 100. Obviously, by providing the first notch 310, the flexural modulus of the first liner tube 300 on the side where the first notch 310 is provided can be reduced, making it easier to bend and deform.

Obviously, the primary sheath 100 is inserted into the primary cavity and is in sliding fit with the primary cavity, and the length of the primary sheath 100 extending out of the primary cavity can be adjusted by pushing and pulling the primary sheath 100. It should be noted that, when the first sheath 100 enters the human body along with the insertion tube 810 of the single-track endoscope 800, only the first sheath 100 and the content 500 need to be kept retracted into the first lumen, and at this time, the first sheath 100 and the content 500 can be moved to bend along with the insertion tube 810. Of course, since the second sleeve member 600 has a bending portion, if the first sheath 100 and the content 500 are located outside the first lumen during the insertion of the insertion tube 810 into the human body, the bending portion can be used to control the bending movement of the second sleeve member 600, and the insertion tube 810 and the bending portion can be simultaneously controlled to realize the insertion.

Alternatively, by maintaining the first sheath tube 100 and the first inner liner tube 300 outside the first lumen, the distal end of the first sheath tube 100 can be driven to bend by controlling the first manipulation wire 400, and at this time, the bending of the insertion tube 810 can be omitted, and since the outer diameter of the second sleeve member 600 formed by combining the first sheath tube 100 and the first inner liner tube 300 is smaller than the outer diameter of the insertion tube 810, the front end of the first sheath tube 100 in the advancing direction of the insertion tube 810 can be advantageously controlled to perform a guiding function, thereby facilitating the insertion of the tube.

In the interventional catheter operation, the first sheath 100 needs to be inserted into the body passageway in cooperation with a single-channel endoscope. However, in the case of inserting the primary sheath 100 into the human body, the primary sheath 100 is mostly a flexible tube made of polymer, which is easily bent, stretched or compressively deformed by the portion of the primary lining tube 300 bent by the manipulation of the primary manipulation wire 400, and forces acting on the primary lining tube 300 and the primary sheath 100 are interaction force and reaction force, i.e., the primary sheath tube 100 is stretched or compressed by the manipulation of the primary manipulation wire 400 to drive the primary lining tube 300 to bend. The amount of deformation of the primary sheath 100 by stretching or compressing may reduce the bending stress of the primary lining tube 300, so that the degree of bending of the primary lining tube 300 is much lower than expected, and the bending effect is poor.

Thus, as shown in fig. 9, the present application can make the first bending section 130 of the primary sheath 100 easily bent but the extending direction of the primary sheath 100 is difficult to be stretched by implanting the anisotropic primary support 200.

It will be readily appreciated that the primary sheath 100 is a flexible tube made of a medical grade polymer material having elastic deformation capability. The primary sheath 100 has a primary channel 110, and the primary lining tube 300 is inserted into the primary channel 110, and it should be noted that the primary support 200 is not disposed in the primary channel 110, so as to avoid compressing the space of the primary channel 110 for accommodating the primary lining tube 300.

Optionally, a solid lubricant such as molybdenum disulfide, a fluid lubricant such as medical silicone oil, a mixed lubricant such as a suspension of molybdenum disulfide and an adhesive, etc. are used for the inner wall of the first sheath tube 100, so that friction resistance between the first bending section 130 and the first inner liner tube 300 is reduced, the outer surface of the first inner liner tube 300 and/or the inner wall of the first sheath tube 100 is treated, and the probability of occurrence of a seizing condition between the first inner liner tube 300 and the first sheath tube 100 can be further reduced.

Illustratively, the primary sheath 100 should be made of a material having a small elastic coefficient to accommodate elastic deformation of the primary lining tube 300, which is advantageous in reducing friction.

Of course, in other embodiments, the primary sheath 100 and primary liner 300 may be configured to be made of a low interface friction material, thereby reducing the surface coefficient of friction thereof.

In this example, the second sleeve member 600 operates according to the following principle:

when the number of the first manipulation wires 400 is two, one of the two first manipulation wires 400 is connected to one end of the first lining tube 300, which is far away from the first bending section 130, and the other end is connected to the first bending section 130, and the two first manipulation wires 400 are respectively located at two opposite sides of the first lining tube 300.

Illustratively, the first notch 310 of the first inner liner 300 and the first support 200 are located on the same side of the first sheath 100, and the two first manipulation wires 400 are divided into a manipulation wire a and a manipulation wire B, which are connected at a side of the first inner liner 300 away from one end of the first curved section 130 of the first sheath 100 and close to the first notch 310, and at a side of the manipulation wire B away from the first support 200.

When the steering wire a is pulled, the first liner tube 300 tends to lengthen, and thus bend upward; the primary sheath 100 with the primary support 200 exhibits compression and the primary support 200 cannot be compressed/stretched, and the side of the primary sheath 100 where the primary support 200 is not disposed tends to shorten, so that the primary sheath 100 bends upward and the two combine to exhibit upward bending of the adjustable bend catheter assembly.

When the manipulation wire B is pulled, the primary sheath 100 having the primary support 200 is expressed as a tensile force, the primary support 200 cannot be compressed/stretched, and the side of the primary sheath 100 where the primary support 200 is not provided tends to lengthen, so that the primary sheath 100 is bent downward; the primary backing tube 300 is not directly stressed, but is flexible in both directions of curvature in the plane, following the curvature of the primary sheath 100, and the two combine to allow the adjustable catheter assembly to exhibit downward curvature.

It should be noted that the reason for limiting the thickness of the endoscope system to the greatest extent is that there is too much content 500 in the tip bending portion that needs to actively bend, including, for example, non-variable content 500, ropes, rope channels, geometrically, peripheral unavailable space due to rope channels, while the distance between hinges is too long, the maximum angle at which each hinge can bend is large, the curvature is uneven, or the discrete fitted line segments that make up the overall curvature are too long, so the overall filling rate must be controlled to be small in order to avoid large scratches or additional parasitic friction.

In this application, since the two first control wires 400 only transmit tensile force, there is no special requirement for axial rigidity, and the most common thin steel wire ropes can be used for realizing the system, so that the system is more flexible and the compliance is improved. To make more reasonable use of space, the two first steering wires 400 may use rectangular cross sections instead of circular cross sections, making the space more compact and making the endoscope system thinner.

As shown in fig. 6, the first sleeve member 700 includes a second sheath tube 900, and the second sheath tube 900 and the insertion tube 810 are detachably connected, and the second sheath tube 900 has a second main channel, which forms a first channel.

In the related art, since the holding amount of a single clip in a hospital is large, the second sheath 900 can be detachably connected to the insertion tube 810, and the application state is switched by attaching and detaching the first sheath 100.

Illustratively, the profile of the insertion tube 810 that the secondary sheath 900 is held to the endoscope by the clip is elliptical, the center of the secondary sheath 900 is a minor axis on the line connecting the center of the insertion tube 810 and a major axis perpendicular thereto. This structure can be caught on the front end portion of the insertion tube 810 simply by deformation of the clip itself, and a reliable coupling force can be obtained. In addition, since the second sheath 900 is a lossy member, it is easy to replace by a detachable structure.

Of course, the secondary sheath 900 may be directly secured to the insertion tube 810; for example, the secondary sheath 900 is bonded to the insertion tube 810.

On the basis of the above embodiment, the first sleeve member 700 further includes a second support member, a second liner tube 1000 and a plurality of second control wires, the second sheath tube 900 has a second bending section 910 and a second infusion section 920, the insertion tube 810 has a distal end portion and an operation portion, the second infusion section 920 is close to the operation portion, the second infusion section 920 is connected to the insertion tube 810, the second support member is at least partially disposed at the second bending section 910, and the second support member is disposed along the extending direction of the second sheath tube 900; wherein the second support is configured to at least enable a tensile modulus of the second curved section to be greater than the curved modulus;

the second liner pipe 1000 is inserted into the second bending section 910, and one end of the second liner pipe 1000 close to the second bending section 910 is connected with the second bending section 910; the second liner pipe 1000 has a plurality of second slots 1100, the plurality of second slots 1100 are disposed at intervals along the extending direction of the second liner pipe 1000, and the second slots 1100 are disposed along the circumferential direction of the second liner pipe 1000; and a second notch 1100 is formed on one side of the second liner tube 1000 adjacent to the second support member; wherein, the first sleeve member 700 is slidably inserted into the second liner tube 1000;

A number of second steering wires are connected to the second liner tube 1000, the number of second steering wires being configured to drive bending of the second liner tube 1000 and the second bending section 910.

The number of the second control wires is two, and the second control wires are the same as the interventional catheters in the market, and are mostly adjustable curved catheters, and one or more stay wires are usually fixed at the distal end of the interventional catheter and extend to the proximal end of the interventional catheter, so that the curved deformation of the interventional catheter can be controlled through the stay wires, and the applicability of the second control wires is improved. That is, when in use, the two wiredrawing wires are pulled by the operation handle, so that the distal end of the adjustable bending catheter connected with the wiredrawing wires can be bent bidirectionally.

In this embodiment, the second sheath 900 has a distal end and a proximal end, the distal end is close to the distal end of the insertion tube 810, the proximal end is far away from the distal end, the portion of the second sheath 900 located at the distal end is the second curved section 910, the portion of the second sheath 900 located at the proximal end is the second infusion section 920, wherein the distal end of the second sheath 900 can be inserted into the human body, and the proximal end of the second sheath 900 is connected to the endoscope operating handle.

As shown in fig. 8, in the present application, a second liner tube 1000 is inserted into the second bending section 910, and a plurality of second notches 1100 are provided on one side of the second liner tube 1000, and the plurality of second notches 1100 are spaced apart along the extending direction (i.e., the axial direction) of the second liner tube 1000. Wherein, one side of the second liner 1000 where the second notch 1100 is provided is close to the second support, i.e. the second notch 1100 and the second support are located at the same side of the second sheath 900. Obviously, by providing the second notch 1100, the flexural modulus of the side of the second liner tube 1000 where the second notch 1100 is provided can be reduced, making it easier to bend and deform.

Obviously, the second infusion section 920 is secured to the distal end of the insertion tube 810 such that the second curved section 910 is proximate to the end of the distal end; as shown in FIG. 15, the second sleeve member 600 may be curved in the xz plane, either unidirectionally or bidirectionally. The second cannula member 600 is movable within the first lumen, i.e., translatable along the x-axis. The second sleeve member 600 is rotatable within the first lumen, i.e., about the x-axis. The first sleeve member 700 may be curved in the xz plane, but without other degrees of freedom.

In summary, the second sleeve member 600 may bend, spin, translate, and the first sleeve member 700 may bend. According to the bending principle described above, a driving force acts on the first liner tube 300 and the second liner tube 1000. The second bending section 910 of the steering wire 400, which spans the second sheath 900, does not affect the intended bending of the first sheath member 700 or the second sheath member 600 because it is flexible.

In the initial state, the first sleeve member 700 and the distal end portion are parallel, and the end portion of the first sleeve member 700 does not protrude from the end portion of the distal end portion, so as to avoid the second sheath 900 from interfering with the bending of the insertion tube 810.

In the interventional catheter operation, the second sheath 900 needs to be inserted into the body channel in cooperation with the single channel endoscope. However, in the case of inserting the secondary sheath 900 into the human body, the secondary sheath 900 is mostly a flexible tube made of polymer, which is easily bent, stretched or compressively deformed by the portion of the secondary liner 1000 bent by the manipulation of the secondary manipulation wire, and forces acting on the primary liner 300 and the primary sheath 100 are interaction force and reaction force, i.e., the bending of the secondary liner 1000 is driven by the manipulation of the secondary manipulation wire, which causes the secondary sheath 900 to be stretched or compressed. The amount of deformation of the secondary sheath 900 by stretching or compressing may reduce the bending stress of the secondary liner 1000, so that the bending degree of the secondary liner 1000 is much lower than expected, and the bending effect is poor.

Thus, the present application can make the second sheath 900 easily bent but the extension direction of the second sheath 900 is hardly stretched by implanting the anisotropic second support.

It will be readily appreciated that the secondary sheath 900 is a flexible tube made of a medical polymer material having elastic deformation capability. The second sheath 900 has a second main channel, and the second liner 1000 is inserted into the second main channel, where the second support is not disposed in the second main channel, so as to avoid compressing the space of the second main channel for accommodating the second liner 1000.

Optionally, a solid lubricant such as molybdenum disulfide, a fluid lubricant such as medical silicone oil, a mixed lubricant such as a suspension of molybdenum disulfide and an adhesive, etc. are used for the inner wall of the second sheath 900, so that friction resistance between the second bending section 910 and the second inner liner 1000 is reduced, the outer surface of the second inner liner 1000 and/or the inner wall of the second sheath 900 is treated, and the probability of occurrence of a seizing condition between the second inner liner 1000 and the second sheath 900 can be further reduced.

For example, the secondary sheath 900 should be made of a material with a small elastic coefficient to adapt to the elastic deformation of the secondary liner 1000, so as to reduce friction.

Of course, in other embodiments, as described above, the secondary sheath 900 and secondary liner 1000 are configured to be made of a low interface friction material, thereby reducing the surface coefficient of friction thereof.

In this example, the first sleeve member 700 operates on the following principle:

when the number of the second control wires is two, one of the two second control wires is connected to one end of the second liner tube 1000 away from the second bending section 910, the other end is connected to the second bending section 910, and the two second control wires are respectively located at two opposite sides of the second liner tube 1000.

Illustratively, the second notch 1100 of the second liner 1000 and the second support are located on the same side of the second sheath 900, and the two second control wires are divided into a control wire C and a control wire D, where the control wire C and the second liner 1000 are connected at a side of the second curved section 910 of the second sheath 900 that is far from the second notch 1100 and the control wire D is connected at a side of the second sheath 900 that is far from the second support.

When the steering wire C is pulled, the second liner tube 1000 tends to become longer, and thus bends upward; the secondary sheath 900 with the secondary support member exhibits compression and the secondary support member cannot be compressed/stretched, and the side of the secondary sheath 900 where the secondary support member is not provided tends to shorten, so that the secondary sheath 900 bends upward, and the two combine to cause the primary sheath member 700 to exhibit upward bending.

When the manipulation wire D is pulled, the second sheath 900 having the second support member is expressed as a tensile force, the second support member cannot be compressed/stretched, and the side of the second sheath 900 where the second support member is not provided tends to lengthen, so that the second sheath 900 is bent downward; the second liner tube 1000 is not directly stressed, but has flexibility in both bending directions in a plane, and follows the bending of the second sheath tube 900, and the two are combined, so that the first sleeve member 700 is bent downwards.

Based on the above embodiment, the first notch 310 and the second notch 1100 are disposed in opposition.

That is, the side of the primary sheath 100 where the primary notch 310 is provided and the side of the secondary sheath 900 where the secondary notch 1100 is provided are disposed opposite to each other so that they are disposed in an opposed manner. Obviously, this arrangement facilitates bending of the primary and secondary sheaths 100, 900.

As shown in fig. 8, on the basis of the above embodiment, the first liner tube 300 has a first extension 340, the first extension 340 and the first bending section 130 are coaxially connected, and the first extension 340 is provided with a third notch 320, and the third notch 320 is configured to enable the first extension 340 to be elastically bent.

That is, the flexural modulus of the first liner tube 300 is reduced by providing the third notch 320 on the first extension 340. It will be readily appreciated that to compress the interior space to protect the contents 500 within the first liner 300 from external compression, the first liner 300 is provided with a first extension 340, the first liner 300 is required to have a certain structural strength, and the third notch 320 is provided to ensure that the first liner 300 has a pliable character.

Illustratively, as shown in FIG. 3, the third slot 320 is configured as a helical groove, the third slot 320 extending along a third helix, the cylinder in which the third helix resides being coaxial with the first liner tube 300. This construction provides good flexibility in all radial directions of the first liner tube 300, and by increasing the pitch of the helical groove, it provides some axial resistance to deformation, so as to resist deformation of the first extension 340 when axially stressed.

In other embodiments, as illustrated in fig. 4, the first extension 340 is cut in a shape with starting points distributed in a spiral line to form the third notch 320, and this method still can make the first extension 340 have good bending capability in all radial directions, and the thinner and denser the third notch 320, the shorter the distance per circumference period, and the larger the starting angle phase difference per period, the better the effect.

It should be noted that the spiral may also be discontinuous to enable the first extension 340 to reduce deformation that may occur when subjected to axial tension.

On the basis of the above embodiment, the second liner tube 1000 has the second extension section 1300, the second extension section 1300 and the second bending section 910 are coaxially connected, the second extension section 1300 is provided with the fourth notch configured to enable the second extension section 1300 to be elastically bent.

That is, the flexural modulus of the second liner tube 1000 is reduced by providing a fourth notch on the second extension 1300. It is easy to understand that, in order to prevent the second liner tube 1000 from being extruded from the outside and compress the inner space to protect the first sheath tube 100 in the second liner tube 1000, the second liner tube 1000 is provided with the second extension section 1300, and the second liner tube 1000 needs to have a certain structural strength, and meanwhile, in order to ensure that the second liner tube 1000 has a flexible property, a fourth notch is provided.

Illustratively, the fourth notch is configured as a helical groove extending along a fourth helix, the cylinder in which the fourth helix resides being coaxial with the second liner 1000. This structure has good bending capability in all radial directions of the second liner tube 1000, and a certain axial deformation resistance is obtained by increasing the pitch of the spiral groove so as to resist the deformation of the second extension section 1300 when the second extension section is stressed in the axial direction.

In other embodiments, the second extension 1300 is cut in a shape with starting points distributed in a spiral line to form a fourth notch, which still provides the first extension 340 with good bending capability in all radial directions, and the thinner and denser the fourth notch, the shorter the distance per circumference period, and the larger the starting angle phase difference per period, the better the effect.

As shown in fig. 5, on the basis of the above embodiment, the first liner tube 300 is further provided with a plurality of fifth notches, the plurality of fifth notches are disposed at intervals along the extending direction of the first liner tube 300, and the fifth notches are disposed along the circumferential direction of the first liner tube 300;

the first notch 310 and the fifth notch are respectively located on two opposite side walls of the first lining tube 300, a first area 330 and a second area are respectively arranged at two ends of the first lining tube 300, the first notch 310 is located in the first area 330, and the fifth notch is located in the second area.

That is, the distribution areas of the first notch 310 and the fifth notch are located at both ends of the first liner tube 300, respectively. As with the first notch 310, the fifth notch can reduce the flexural modulus at the second region, making it easier to bend.

Obviously, since the first notch 310 and the fifth notch are provided at both ends of the first liner tube 300, the first liner tube 300 can be easily bent bi-directionally, and bending resistance can be reduced.

On the basis of the above embodiment, the second liner tube 1000 is further provided with a plurality of sixth notches, the plurality of sixth notches are arranged at intervals along the extending direction of the second liner tube 1000, and the sixth notches are arranged along the circumferential direction of the second liner tube 1000 in an extending manner;

The second notch 1100 and the sixth notch are respectively located on two opposite side walls of the second liner tube 1000, and the two ends of the second liner tube 1000 are respectively provided with a third area 1200 and a fourth area, the second notch 1100 is located in the third area 1200, and the sixth notch is located in the fourth area.

That is, the distribution areas of the second and sixth slots 1100 and sixth slots are located at both ends of the second liner tube 1000, respectively. The sixth notch can reduce the flexural modulus at the fourth region, making it easier to bend, as the second notch 1100 does.

Obviously, since the second notch 1100 and the sixth notch are provided at both ends of the second liner tube 1000, the second liner tube 1000 can be conveniently bent bi-directionally, and bending resistance is reduced.

As shown in fig. 11, 12, 13 and 14, based on the above embodiment, the number of the first manipulation wires 400 is one, the first sheath tube 100 has a first main lumen 110 and a first auxiliary lumen 140, the first inner liner tube 300 is inserted into the first main lumen 110, the first manipulation wires 400 can be elastically deformed, one end of the first manipulation wires 400 is connected with the first inner liner tube 300, and the first manipulation wires 400 are inserted into the first auxiliary lumen 140;

wherein the first secondary lumen 140 is configured to limit the range of oscillation of the first steering wire 400 within the cross-section of the first sheath 100 such that the first steering wire 400 is switchable between at least a pulling force and a pushing force that are applied to bend the first bending section 130.

Obviously, the outer diameter of the second sleeve member 600 can be reduced by using a single first control wire 400, so that the product can be conveniently inserted into a human body, and the first control wire 400 cannot be too thick, so that the whole body filling rate and flexibility are prevented from being influenced.

That is, the first manipulation wire 400 needs to have elastic deformation capability, and further, the first auxiliary channel 140 is provided to limit the swing range of the first manipulation wire 400, and since the first manipulation wire 400 has a certain rigidity and poor stretchability, when the first manipulation wire cannot swing and bend in a large range in a radial direction, the first manipulation wire 400 can have a function of transmitting a tensile force and a pushing force.

A first auxiliary channel 140 is additionally arranged in the first sheath tube 100 to isolate the first control wire 400 from the first main channel 110, and the first control wire 400 can transmit pushing force and pulling force to the first bending section 130 by the size limitation of the first auxiliary channel 140, so that bidirectional bending of the bending part can be driven by a single first control wire 400, the mode of controlling the bidirectional bending of the first bending section 130 by double ropes is replaced, the occupied space of the ropes can be reduced, and the filling rate of the content 500 is reduced; the first auxiliary channel 140 is configured to limit the channel of the first control wire 400, so that when the first control wire 400 is pushed at one end and is resisted at the other end, the first control wire is forced to radially swing and cannot deform due to the limitation of the diameter of the first auxiliary channel 140, and the axial pushing force and the pulling force are better conducted. Obviously, by providing the first auxiliary channel 140, the contact between the first control wire 400 and the content 500 in the first main channel 110 can be avoided, so that the content 500 can be better protected due to extrusion and abrasion.

Illustratively, when the first secondary channel 140 is a circular channel, the first secondary channel 140 and the first steering wire 400 are clearance fit.

Obviously, the contact area between the inner wall of the first auxiliary cavity channel 140 and the first control wire 400 can be reduced by setting the gap, so that the first control wire 400 can be limited by the first auxiliary cavity channel 140, and the friction force between the first control wire 400 and the first auxiliary cavity channel 140 can be reduced when the first control wire 400 is pushed and pulled.

Of course, the first auxiliary channel 140 may be provided in other structures as long as the same function is achieved. Illustratively, the bore wall of the first secondary lumen 140 is divided into a first portion that is proximal to the first steering wire 400 and a second portion that is distal to the first steering wire 400; wherein the first portion is formed with a spacing region configured to maintain the first steering wire 400 in the spacing region.

That is, the first control wire 400 can only move in the limiting area, so that it is known that the first control wire 400 cannot contact the second portion, and the area of the first control wire 400 capable of contacting the first auxiliary channel 140 can be further reduced, which is beneficial to reducing the friction force between the first control wire and the second auxiliary channel.

In short, the cross-section of the first auxiliary channel 140 is designed to be circular and its expanded shape in order to reduce the contact area and friction, improve the conduction efficiency, and not to escape the first manipulation wire 400 to both sides due to the size of the first auxiliary channel 140. Alternatively, the cross-section of the first sub-channel 140 is provided in a diamond shape, a triangle shape, an oval shape, a polygon shape, or the like.

It will be readily appreciated that the first steering wire 400 is connected to the first inner tube 300 on the side thereof remote from the first notch 310, and the connection point of the first steering wire 400 and the first inner tube 300 is remote from the distal end of the first sheath tube 100, and that the first inner tube 300 tends to lengthen and thus bend upward when the first steering wire 400 is pulled; the primary sheath 100 incorporating the primary support 200 of anisotropic material is shown to be pressurized, the side of the primary sheath 100 having the primary support 200 cannot be compressed/stretched, and the non-reinforced side (the side of the primary sheath 100 where the primary support 200 is not provided) tends to shorten, thus bending upwards, and the two combine to make the first bending section 130 of the primary sheath 100 appear to bend upwards. When the first steering wire 400 is pushed, the first bending section 130 appears to bend downward.

Based on the above embodiment, the number of the second control wires is one, the second sheath 900 has a second main cavity and a second auxiliary cavity, the second liner tube 1000 is penetrated in the second main cavity, the second control wires can be elastically deformed, one end of each second control wire is connected with the second liner tube 1000, and the second control wires are penetrated in the second auxiliary cavity;

Wherein the second secondary lumen is configured to limit the range of oscillation of the second steering wire within the cross-section of the second sheath 900 such that the second steering wire is switchable between at least a pulling force and a pushing force applied to bend the second curved section 910.

Obviously, use single second to control the external diameter that the silk can reduce first cover pipe fitting 700, be convenient for insert the human body with this product, and the second is controlled the silk and can not be too thick to avoid influencing whole cavity filling rate and flexibility ratio, and be convenient for carry out the operation at the narrow chamber of human body.

That is, the second control wire needs to have elastic deformation capability, and further the swing range of the second control wire is limited by setting the second auxiliary channel to cooperate with the second auxiliary channel.

A second auxiliary cavity channel is additionally arranged in the second sheath 900 to isolate the second control wire from the second main cavity channel, and the second control wire can transmit pushing force and pulling force to the second bending section 910 through the size limitation of the second auxiliary cavity channel, so that the bidirectional bending of the second bending section 910 can be driven through a single second control wire, the mode of controlling the bidirectional bending of the second bending section 910 through double ropes is replaced, the occupied space of the ropes can be reduced, and the filling rate of the content 500 is reduced; the second auxiliary cavity channel is used for limiting the cavity channel of the second control wire, so that when one end of the second control wire is pushed and the other end of the second control wire is resisted, the axial pushing force and the axial pulling force are better conducted because the radial swinging trend is limited by the diameter of the second auxiliary cavity channel and cannot be deformed. Obviously, through setting up the second secondary channel and can avoid the second to control the silk and the interior content 500 of second primary channel to contact, and cause extrusion, wearing and tearing, can be higher protection content 500.

Illustratively, when the second secondary channel is a circular aperture, the second secondary channel and the second steering wire are in clearance fit.

Obviously, the contact area of the inner wall of the second auxiliary cavity channel and the second control wire can be reduced by setting the gap, so that the second control wire can be limited through the second auxiliary cavity channel, and the friction force between the second control wire and the second auxiliary cavity channel during pushing and pulling of the second control wire can be reduced.

Of course, the second auxiliary channel may be provided in other structures as long as the same effect can be achieved. The hole wall of the second auxiliary cavity channel is divided into a third part and a fourth part, wherein the third part is close to the second control wire, and the fourth part is far away from the second control wire; wherein the third portion is formed with a second spacing region configured to retain the second steering wire in the second spacing region.

That is, the second control wire can only move in the second limiting area, so that the second control wire cannot contact the fourth portion, the area of the second control wire capable of contacting the second auxiliary cavity can be further reduced, and friction between the second control wire and the fourth portion can be reduced.

In short, the cross section of the second auxiliary cavity is designed to be circular and the purpose of expanding the shape thereof is to reduce the contact area and friction force and improve the conduction efficiency, and the second control wire cannot escape to two sides due to the size of the second auxiliary cavity. Optionally, the cross section of the second secondary channel is provided as a diamond, triangle, ellipse, polygon, etc.

It is easy to understand that the second manipulation wire is connected to the side of the second liner tube 1000 away from the second notch 1100, and the connection point of the second manipulation wire and the second liner tube 1000 is far away from the distal end of the second sheath tube 900, and when the second manipulation wire is pulled, the second liner tube 1000 tends to be elongated and thus bends upward; the secondary sheath 900 incorporating the secondary support made of anisotropic material exhibits compression, and the side of the secondary sheath 900 having the secondary support cannot be compressed/stretched, and the non-reinforced side (the side of the secondary sheath 900 where the secondary support is not provided) tends to be shortened, so that it is bent upward, and the two combine to exhibit upward bending of the bent portion of the secondary sheath member 600. When the second steering wire is pushed, the second sheath 900 appears to bend downward.

It should be noted that, the bending degree can be improved by controlling the bending of the second sheath 900 to drive the first sheath 100 to bend synchronously.

As shown in fig. 13 and 14, the first secondary lumen 140 is disposed only within the first infusion section 120 to facilitate connection of the first steering wire 400 and the first liner tube 300, as in the previous embodiments.

As shown in fig. 11 and 12, the first support 200 is provided in an elongated structure on the basis of the above-described embodiment, and the first support 200 is mounted in the sidewall of the primary sheath 100.

The first supporting member 200 is at least one of carbon fiber, nickel titanium wire, and steel wire rope. More specifically, the first support 200 is made of a strip-shaped material having such properties as carbon fiber, nickel titanium wire, a wire rope, etc., wherein the carbon fiber has a low flexural modulus, the nickel titanium wire has a pseudo-elasticity in a flexural direction, and the wire rope has a low flexural modulus and is relatively remarkably difficult to be deformed in tension in an axial direction. It should be noted that the present invention is not limited to these materials, and may be other materials capable of achieving the same effects.

Alternatively, the first supporting member 200 is formed of a single or a plurality of wire ropes arranged side by side; likewise, the first support 200 may be formed by arranging a plurality of carbon fibers or nickel titanium wires in parallel. Alternatively, the first supporting member 200 is formed by mixing and arranging a plurality of carbon fibers, a plurality of nickel titanium wires and a plurality of steel wire ropes.

In addition, by installing the first support 200 in the side wall of the first sheath tube 100, the first support 200 can be prevented from occupying the space of the first main channel 110 of the first sheath tube 100, so that the first main channel 110 forms a complete circle, which is beneficial to improving the filling rate of the content 500 of the first main channel 110.

Illustratively, that is, the primary sheath 100 is provided with a primary auxiliary lumen for mounting the primary support 200. The first auxiliary channel 210 can be provided on the side wall of the first sheath tube 100 in advance, and the long first support 200 can be inserted and fixed into the first auxiliary channel 210 in the later stage. The fixing structure between the first support 200 and the first sheath 100 may be a single-sided fixing, or may be a double-sided fixing. The fixing form is not particularly limited herein, and may be, for example, adhesive, or fixing by interference fit, or the like.

On the basis of the above embodiment, the second support member is provided in an elongated structure, and the second support member is mounted in the sidewall of the second sheath 900.

The second supporting member is at least one of carbon fiber, nickel titanium wire and steel wire rope. More specifically, the second support is made of a strip-like material having such properties as carbon fiber, nickel titanium wire, a wire rope, or the like, wherein the carbon fiber has a low flexural modulus, the nickel titanium wire has a pseudo-elasticity in a flexural direction, and the wire rope has a low flexural modulus and is relatively remarkably difficult to be deformed in tension in an axial direction. It should be noted that the present invention is not limited to these materials, and may be other materials capable of achieving the same effects.

Optionally, the second support is formed by arranging a single wire rope or a plurality of wire ropes in parallel; likewise, the second support member may be formed by arranging a plurality of carbon fibers or nickel titanium wires in parallel. Or the second supporting piece is formed by mixing and arranging a plurality of carbon fibers, a plurality of nickel-titanium wires and a plurality of steel wire ropes.

In addition, by installing the second support in the side wall of the second sheath 900, the second support can be prevented from occupying the space of the second main channel of the second sheath 900, so that the second main channel forms a complete circle, which is beneficial to improving the filling rate of the content 500 of the second main channel.

Illustratively, that is, the secondary sheath 900 is provided with a secondary channel for mounting a secondary support. The second auxiliary cavity can be arranged on the side wall of the second sheath 900 in advance, and the long-strip-shaped second supporting piece can be arranged in the second auxiliary cavity in a penetrating mode in the later period. The fixing structure between the second support and the second sheath 900 may be a single-sided fixing structure, or may be a double-sided fixing structure. The fixing form is not particularly limited herein, and may be, for example, adhesive, or fixing by interference fit, or the like.

According to a second aspect of the present disclosure, a surgical system is provided that includes a multi-jaw endoscope.

Since the multi-jaw endoscope has the technical effects described above, the surgical system including the multi-jaw endoscope should have the same technical effects, and will not be described herein.

Any particular values in all examples shown and described herein are to be construed as merely illustrative and not a limitation, and thus other examples of exemplary embodiments may have different values.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

The above examples merely represent a few embodiments of the present invention, which are described in more detail and are not to be construed as limiting the scope of the present invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention.

Claims

1. A multi-jaw endoscope, the multi-jaw endoscope comprising:

The external clamp path comprises:

the first sleeve piece is connected to the insertion tube and is provided with a first cavity, and the first sleeve piece and the first cavity are both arranged in an extending mode along the extending direction of the insertion tube; and

2. The multi-channel endoscope according to claim 1, wherein said second sleeve member comprises:

3. The multi-channel endoscope according to claim 2, wherein said first sleeve member comprises:

4. The multi-jaw endoscope according to claim 3, wherein said first sleeve member further comprises:

5. The multi-channel endoscope according to claim 4, wherein the first notch and the second notch are disposed in opposition.

6. The multi-channel endoscope according to claim 4, wherein the first liner tube has a first extension section, the first extension section and the first bending section are coaxially connected, and the first extension section is provided with a third notch configured to enable elastic bending of the first extension section.

7. The multi-channel endoscope according to claim 6, wherein the second liner tube has a second extension segment coaxially connected to the second bending segment, the second extension segment being provided with a fourth notch configured to enable elastic bending of the second extension segment.

8. The multi-channel endoscope according to claim 7, wherein the third notch and the fourth notch are each configured as a helical groove.

9. The multi-jaw endoscope according to claim 2, wherein the first lining tube is further provided with a plurality of fifth notches, the plurality of fifth notches are arranged at intervals along the extending direction of the first lining tube, and the fifth notches are arranged along the circumferential extension of the first lining tube;

10. The multi-jaw endoscope according to claim 4, wherein the second liner tube is further provided with a plurality of sixth notches, the plurality of sixth notches being arranged at intervals along the extending direction of the second liner tube, and the sixth notches being arranged along the circumferential extension of the second liner tube;

11. The multi-lane endoscope according to claim 2, wherein the number of the first steering wires is one, the first sheath tube has a first main lane and a first auxiliary lane, the first liner tube is threaded through the first main lane, the first steering wires are elastically deformable, one end of the first steering wires is connected with the first liner tube, and the first steering wires are threaded through the first auxiliary lane;

12. The multi-channel endoscope according to claim 4, wherein the number of the second control wires is one, the second sheath tube is provided with a second main channel and a second auxiliary channel, the second inner liner tube is arranged in the second main channel in a penetrating manner, the second control wires can be elastically deformed, one end of each second control wire is connected with the second inner liner tube, and the second control wires are arranged in the second auxiliary channel in a penetrating manner;

13. The multi-channel endoscope according to claim 4, wherein the first support is provided in an elongated configuration and is mounted within a sidewall of the first sheath;

14. A surgical system comprising a multi-jaw endoscope according to any one of claims 1 to 13.