Bendable urinary sheath

Abstract

The present invention provides a bendable urinary sheath, comprising an upright section; a bending section, having an arc-shaped surface that enables the bending section to have a preset curvature in a natural state, wherein the bending section is located at the head end of the bendable urinary sheath, the bending section has a first state, the bending section is bent to have the preset curvature in the first state, and the bending angle of the preset curvature is determined by the bending angle of a passage in the human body; and a control section, wherein two ends of the control section are connected to the rear end of the bending section and the front end of the upright section, respectively, and an external force is applied to change the bending direction of the control section, thereby changing the orientation of the arc-shaped surface of the bending section, so that the bending section reaches various positions of the kidney.

Description

Bendable urinary sheath tube TECHNICAL FIELD

[0001] The present application relates to the field of medical devices, in particular to a bendable urinary sheath tube. BACKGROUND

[0002] Ureteral access sheaths play an important role in the examination and treatment of urological surgery, establishing a channel for endoscopes and other instruments to access the upper urinary tract. Accessing the ureter or kidney through the natural passageways of the human body, the access sheath can expand the ureter and make it easier for the ureteroscope to enter, helping to protect the ureteroscope and the ureter, making the ureteroscope suitable for performing examinations or surgical operations in the ureter or kidney.

[0003] Due to the physiological narrowness of the ureter and the complexity of the kidney structure, there are many parts that need to be explored or operated after entering the kidney, so the bending angle of the access sheath needs to be dynamically adjusted in real time to meet the actual use requirements. Although the traditional access sheath can bend with the active bending of the soft mirror, in order to protect the ureteroscope and the soft mirror, it is necessary to achieve bending on the basis of meeting certain strength, resulting in insufficient bending angle, and the tube opening of the access sheath cannot reach all parts of the kidney, so that the stones, cysts and other lesions in the dead angle of the kidney cannot be well treated. That is, the tube opening of the access sheath cannot approach the lesion area, resulting in some blood clots, stones, and pus that cannot be easily removed during the operation; in addition, the endoscope extends out of the tube opening to work, and the tube opening cannot approach the lesion area, which also leads to unsatisfactory surgical results.

[0004] Therefore, there is an urgent need for an access sheath that can achieve greater bending and controllable and adjustable bending angle to reach all parts of the kidney to meet more clinical needs.

[0005] SUMMARY

[0006] One advantage of the present application is to provide a bendable urinary sheath tube, wherein the bendable urinary sheath tube has a preset curvature, which can be further adjusted under the action of the endoscope after entering the human body, and the preset curvature makes the angle adjustment time-saving and labor-saving, and fine-tuning the endoscope can make the bendable urinary sheath tube bend to a larger angle to reach all parts of the kidney.

[0007] Another advantage of the present application is to provide a bendable urinary sheath tube, wherein the bendable urinary sheath tube comprises a bending segment and a control segment, the bending segment has an arc surface, and the control segment can bend omnidirectionally under the action of external force, thereby driving the bending segment to move to change the orientation of the arc surface to reach all parts of the kidney.

[0008] Another advantage of the present application is to provide a bendable urinary sheath, which, when entering the human body, cooperates with a soft mirror, and the bending angle of the bendable urinary sheath can be dynamically adjusted in real time by adjusting the soft mirror to reach the lesion area to be operated under visual conditions, thereby meeting the clinical use requirements.

[0009] Another advantage of the present application is to provide a bendable urinary sheath, wherein the bending section of the bendable urinary sheath is in a curved state in a natural state, and can become a straight state or a state close to the straight state with the assistance of the inner core, so as to more smoothly enter the natural passage of the human body.

[0010] Another advantage of the present application is to provide a bendable urinary sheath, wherein the end of the bendable urinary sheath can be detachably connected with a ureteroscope, and a user can hold it with one hand, so that the operation is simple and convenient to use.

[0011] Another advantage of the present application is to provide a bendable urinary sheath, wherein the arrangement density of the spring ring of the control section is smaller than that of the spring ring of the bending section, so that the angle adjustment of the control section is more free, and the steering is more flexible.

[0012] Another advantage of the present application is to provide a bendable urinary sheath, wherein the reinforcing members are arranged in the mesh holes of the steel wire mesh at intervals, so as to ensure that the steel wire mesh will not be damaged due to expansion deformation caused by compression or extrusion during the bending angle adjustment of the bendable urinary sheath, thereby effectively protecting the ureter.

[0013] Another advantage of the present application is to provide a bendable urinary sheath, wherein the inner wall and the outer wall of the insertion tube are provided with hydrophilic coatings, so that the insertion into the human body is more smooth, and the human body tissue is protected.

[0014] Another advantage of the present application is to provide a bendable urinary sheath, wherein the steering and bending adjustment of the control section are suitable for being adjusted by an endoscope, or can be adjusted by setting a corresponding adjusting unit.

[0015] According to one aspect of the present application, the present application provides a bendable urinary sheath, comprising:

[0016] a straight section;

[0017] a bending section, the bending section having an arc surface, the arc surface making the bending section have a preset arc in a natural state; and

[0018] a control section, both ends of the control section being connected to the rear end of the bending section and the front end of the straight section, respectively, and the bending direction of the control section being changed to change the orientation of the arc surface of the bending section, so that the bending section reaches each position of the kidney.

[0019] The bendable urinary sheath further comprises a working channel, which penetrates through the bending section, the control section and the upright section, and an endoscope is adapted to be detachably arranged in the working channel and control the bending of the bending section and the control section to change the bending angle of the bending section and the orientation of the arc surface.

[0020] The bending section comprises a bending member, and the control section comprises a control member connected to the rear end of the bending member, and the control member is bent by external force to drive the bending member to move, and the orientation of the arc surface of the bending member changes with the bending direction of the control member.

[0021] According to an embodiment of the present application, the bending member and the control member are both spiral structures, and the spiral structure of the bending member is in a bent state in a natural state, and the spiral structure of the control member is in an upright state in a natural state.

[0022] The number of spiral layers of the control member is less than the number of spiral layers of the bending member, and the number of spiral layers of the bending member is less than the number of spiral layers of the upright section, and the outer side of the bending member and the control member is covered with a hydrophilic outer wall.

[0023] According to another embodiment of the present application, the bending member and the control member are both net-like structures, and the net-like structure of the bending member is in a bent state in a natural state, and the net-like structure of the control member is in an upright state in a natural state.

[0024] The net-like structure comprises a plurality of mesh lines, a plurality of connection points and a plurality of reinforcing members, the plurality of mesh lines intersect and are connected through the connection points to form a plurality of mesh holes, the reinforcing members are located in the mesh holes and connected between the connection points, and the reinforcing members are arranged in the mesh holes at intervals.

[0025] The mesh density of the control member is less than the mesh density of the bending member, and the mesh density of the bending member is less than the mesh density of the upright section, and the outer side of the bending member and the control member is covered with a hydrophilic outer wall.

[0026] The mesh holes are triangular, quadrilateral, pentagonal or hexagonal.

[0027] The bendable urinary sheath further comprises a connecting element, wherein the connecting element is arranged at the rear end of the upright section to detachably connect the rear end of the upright section with an operating end of an endoscope. According to another aspect of the present application, the present application further provides a bendable urinary sheath, comprising:

[0028] An inner wall, an outer wall and an intermediate layer, the inner wall and the outer wall respectively covering the inner and outer sides of the intermediate layer and forming a working channel for detachably mounting an endoscope and being suitable for suction and drainage through the working channel, wherein the bendable urinary sheath further comprises a bending section, a control section and a vertical section, the control section being connected between the bending section and the vertical section, the bending section being naturally curved, wherein the control section comprises an adjusting unit, the adjusting unit comprising at least three adjusting lines and at least three adjusting members, the adjusting members being arranged at the end of the vertical section, the adjusting lines being evenly arranged between the control section and the adjusting members, the length of the adjusting lines being changed by adjusting the adjusting members to control the bending section to bend in all directions.

[0029] The bending section comprises an arc surface, the arc surface forming a preset arc, the bending section being driven to bend by the bending of the endoscope to change the bending angle of the arc surface, the control section being driven to move the bending section to change the orientation of the arc surface, so that the outlet of the working channel arranged at the front end of the bending section reaches different positions of the kidney.

[0030] According to an embodiment of the present application, the intermediate layers of the bending section and the control section are spiral structures, the spiral structure of the bending section being naturally curved, the control section being naturally straight, and the spiral layer of the bending section being denser than the spiral layer of the control section.

[0031] According to another embodiment of the present application, the intermediate layers of the bending section and the control section are mesh structures, the mesh structure of the bending section being naturally curved, the control section being naturally straight, and the number of mesh holes of the bending section being denser than the number of mesh holes of the control section.

[0032] The preset arc is between 45° and 170°.

[0033] According to another aspect of the present application, the present application further provides a bendable urinary sheath, comprising:

[0034] a bending section, the bending section having an arc surface, the arc surface causing the bending section to have a preset arc in a natural state;

[0035] a main body section, the main body section being connected to the rear end of the bending section; and

[0036] a working channel, the working channel being longitudinally arranged between the bending section and the main body section to detachably mount an endoscope, the bending of the endoscope driving the bending section to move to adjust the bending angle of the bending section and the orientation of the arc surface.

[0037] According to an embodiment of the present application, the intermediate layers of the bending section and the main section are spiral structures, and the spiral layers of the bending section are sparser than the spiral layers of the main section.

[0038] According to another embodiment of the present application, the intermediate layers of the bending section and the main section are net structures, and the meshes of the bending section are sparser than the meshes of the main section.

[0039] The rear end of the main section is provided with a connecting element, which detachably connects the rear end of the upright section with the operating end of an endoscope. BRIEF DESCRIPTION OF DRAWINGS

[0040] Fig. 1 is a structural schematic diagram of a bendable urinary sheath according to a first preferred embodiment of the present application.

[0041] Fig. 2 is a sectional schematic diagram of the bendable urinary sheath according to the above-mentioned first preferred embodiment of the present application.

[0042] Fig. 3 is a partial structural schematic diagram of the bendable urinary sheath according to the above-mentioned first preferred embodiment of the present application.

[0043] Fig. 4 is a schematic diagram of the bending curvature variation of the bendable urinary sheath according to the above-mentioned first preferred embodiment of the present application.

[0044] Fig. 5 is a schematic diagram of the bending direction variation of the bendable urinary sheath according to the above-mentioned first preferred embodiment of the present application.

[0045] Fig. 6 is a schematic diagram of the application of the bendable urinary sheath according to the above-mentioned first preferred embodiment of the present application.

[0046] Fig. 7 is a structural schematic diagram of the bendable urinary sheath according to a second preferred embodiment of the present application.

[0047] Fig. 8 is a partial structural schematic diagram of the bendable urinary sheath according to the above-mentioned second preferred embodiment of the present application.

[0048] Fig. 9 is a whole structural schematic diagram of the bendable urinary sheath according to a third preferred embodiment of the present application.

[0049] Fig. 10 is a whole structural schematic diagram of a variant of the bendable urinary sheath according to the above-mentioned third preferred embodiment of the present application.

[0050] Fig. 11 is a structural schematic diagram of the bendable urinary sheath according to a fourth preferred embodiment of the present application. DETAILED DESCRIPTION

[0051] The following description is presented to enable any person skilled in the art to practice the application as claimed. The preferred embodiments disclosed herein are merely examples of the application and variations and modifications can be used as will occur to those skilled in the art. The generic principles defined herein can be applied to other embodiments and applications without departing from the spirit and scope of the present application.

[0052] It should be understood by those skilled in the art that in the disclosure of the present application, the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the above terms cannot be understood as a limitation of the present application.

[0053] It can be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of one element can be one, and in another embodiment, the number of the element can be multiple, and the term "one" cannot be understood as a limitation of the number.

[0054] Referring to FIGS. 1 to 6, a bendable urinary sheath according to a preferred embodiment of the present application is shown. In the present embodiment, the bendable urinary sheath 10 includes a bending section 11, a control section 12, and a standing section 13, wherein the control section 12 is connected between the bending section 11 and the standing section 13, and the bending direction of the bending section 11 is changed by controlling the control section 12, so that the nozzle of the bending section 11 can reach various positions of the kidney to meet the clinical needs.

[0055] The bendable urinary sheath 10 has a working channel 100 extending from the front end to the rear end of the bendable urinary sheath 10, passing through the bending section 11, the control section 12, and the standing section 13, so as to detachably connect an endoscope.

[0056] The endoscope is sleeved inside the bendable urinary sheath 10 through the working channel 100, and the bending of the bending section 11 and the control section 12 is driven by the active bending of the endoscope, wherein the bending section 11 can be further bent on the basis of the original pre-bending, and the control section 12 can be bent in various directions.

[0057] In addition, the working channel 100 can be used for suction and drainage in addition to accommodating the endoscope. For example, a ureteral flexible scope is adapted to be detachably placed in the working channel 100, but the size of the endoscope is smaller than the size of the working channel, so that drainage, stone removal, and waste removal can be performed through the working channel 100 outside the endoscope during use, or after the endoscope is extracted. Not only does the overall size of the tube and the mirror assembly become smaller, but the size of the suction and drainage channel can be changed by moving the endoscope, which can effectively prevent clogging.

[0058] The curved section 11 is curved in a natural state, the control section 12 and the upright section 13 are upright or close to upright in a natural state, and the curved section 11, the control section 12, and the upright section 13 can be further bent under external force.

[0059] In order to ensure the strength of the bendable urinary sheath 10, the angle range of the upright section 13 is small, and the upright section 13 is located in the ureter, bladder, urethra, and outside the human body during work, without the need for large-scale bending adjustment, but only needs to be appropriately bent to adapt to the natural body channel.

[0060] The bendable urinary sheath 10 further comprises a holding section 130 connected to the rear end of the upright section 13, which is adapted to be held as a holding part for holding operation and liquid infusion.

[0061] The bendable urinary sheath 10 further has a working channel outlet 101, a working channel inlet 103, and an infusion inlet 102, which are all connected to the working channel 100, wherein the working channel outlet 101 is arranged at the front end of the curved section 11, and the working channel inlet 103 and the infusion inlet 102 are arranged at the rear and side of the holding section 130, respectively, for inserting instruments and infusing liquid.

[0062] During work, the curved section 11 and the control section 12 enter the human kidney, the outlet of the working channel 100 is arranged at the front end of the curved section 11 to form the nozzle of the bendable urinary sheath, and the curved section 11 has a large angle of bending and a large range of adjustment, so that the nozzle of the bendable urinary sheath 10 can reach various parts of the kidney, even the dead angle parts or blind areas that cannot be reached by traditional sheaths and mirrors, in order to better achieve the corresponding effect.

[0063] Therefore, the bending section 11 has a large bending angle and an adjustable range to reach each part of the kidney, and the control section 12 can bend in all directions, that is, can adjust the bending direction by 360°, thereby driving the bending section 11 to turn. The control section 12 makes the turning of the bending section 11 more free and convenient, and more easily reaches the lesion area of the dead corner part of the kidney.

[0064] Specifically, the bending section 11 has an arc surface 110, and a preset arc is formed in the direction of the arc surface 110. The size of the preset arc is the bending angle of the bending section 11 in the natural bending state.

[0065] The bending section 11 is located at the head end of the bendable urinary system sheath 10, and the bending end 11 has a first state, in which the bending section is bent at a preset arc. That is, when the bendable urinary system sheath enters the human body, for example, enters the ureter section from the human bladder, the bending end 11 has a natural bending tendency, so that the head end of the bendable urinary system sheath 10 can smoothly enter the ureter along the bending angle of the connection between the human bladder and the ureter. The angle of the bending end is determined by the bending angle before the in-vivo channel of the human body. In particular, the angle of the preset arc is determined by the connection position angle of the lower end of the ureter and the ureteral orifice. It is worth mentioning that when the sheath enters the upper end of the ureter through the lower segment of the ureter, the connection position of the bladder and the lower end of the ureter is a key bend position. In the existing operation, doctors usually use a hard mirror or a hard sheath to guide, straighten the connection end by external force, and facilitate the entry of endoscopes and other instruments, but there is usually a certain risk, and the patient will have a certain pain or discomfort. Therefore, in the present application, the preset arc of the bending end 11 matched with the in-vivo channel of the human body can more smoothly guide the urinary system sheath to enter the ureter from the bladder and smoothly pass through the orifice position, so that the entry of the sheath is more convenient and the risk of operation is reduced.

[0066] The size of the preset arc can be selected as a value between 45° and 170°, which does not affect the suction and discharge operation of the working channel 100, and can be adjusted within a certain range of the preset arc. Those skilled in the art can understand that the preset arc can also be at other angles outside this range, and the bendable urinary system sheath 10 with different preset arcs can also be selected according to different use scenarios to meet different needs.

[0067] It is worth mentioning that the bending angle of the bending section 11 can be changed by external force at each preset arc, so that the bending angle of the bending section 11 can be changed within the corresponding range of each preset arc.

[0068] For example, the preset curvature of the bending section 11 is 60°, and under the action of the endoscope, the preset curvature can be changed around 60°, and can be changed within the maximum bending angle and the minimum bending angle range of the endoscope. However, due to the existence of the preset curvature, the bending angle adjustment of the endoscope to the bending section 11 is more time-saving and labor-saving, the bending angle of the bending section 11 can be changed in a larger range, and the dead angle part of the kidney can be reached.

[0069] When the bendable urinary sheath 10 enters the human body, an auxiliary inner core is installed in the working channel 100, and under the action of the auxiliary inner core in the upright state, the bending section 11 is in an upright state or close to an upright state, so as to enter the urethra-bladder-ureter-kidney of the human body, and after reaching the kidney, the auxiliary inner core is extracted. Then an endoscope is installed through the working channel 100, and the front end of the endoscope reaches the bending section 11 or the control section 12, and the bending of the endoscope is controlled to change the bending angle of the bending section 11 and the bending direction of the control section 12.

[0070] The control section 12 can bend omnidirectionally, that is, it can turn 360°. When the head end of the endoscope reaches the control section 12, under the control of the endoscope, the bending of the endoscope drives the bending of the control section 12, so that the control section 12 can bend towards each direction, and the bending of the control section 12 drives the movement of the bending section 11, so as to change the orientation of the arc surface 111 of the bending section 11, so that the arc surface 111 of the bending section 11 faces different directions. That is, although the bending section 11 is pre-bent towards one direction, under the action of the control section 12, the orientation of the bending section 11 can be changed to different orientations, and thus different positions of the kidney can be reached.

[0071] Therefore, the angle of the bending section 11 is further adjusted on the basis of the preset curvature, the bending angle of the control section 12 is adjusted, and the orientation of the arc surface 111 of the bending section 11 is adjusted, so that the bending section 11 can work in a larger range, and thus corresponding operations can be performed on each position of the kidney to achieve a more ideal surgical effect.

[0072] The flexible urinary sheath 10 further comprises an outer wall 14, an inner wall 15 and an intermediate layer 16, which is arranged between the outer wall 14 and the inner wall 15. The outer wall 14 and the inner wall 15 are made of hydrophilic material or are provided with a hydrophilic coating to facilitate smooth entry into the human body and prevent discomfort to the human body. The intermediate layer 16 is flexible, and in the natural state, the intermediate layer 16 in the curved section 11 is curved, and the intermediate layer 16 in the control section 12 and the upright section 13 is upright or close to upright, and can be switched between upright and curved states under external force.

[0073] The outer wall 14 and the inner wall 15 are tightly attached to the inner and outer sides of the intermediate layer 16, that is, the inner wall 15 and the outer wall 14 are wrapped on the outer side of the intermediate layer 16, and the outer wall 14 forms the channel wall of the working channel 100.

[0074] The outer wall, the inner wall and the intermediate layer of the curved section 11, the control section 12 and the upright section 13 form the outer wall 14, the inner wall 15 and the intermediate layer 16 respectively. The curved section 11 serves as the front section of the flexible urinary sheath 10, and the upright section 13 serves as the rear section of the flexible urinary sheath 10.

[0075] The flexible urinary sheath 10 further comprises a scale mark 17 arranged on the outer surface of the outer wall 14, so that the depth of the flexible urinary sheath 10 into the human body can be directly observed through the scale mark 17. The length of the endoscope entering the working channel 100 can also be determined by combining the scale mark 17 and the length of the endoscope, that is, the front end of the endoscope can be accurately controlled to reach the control section 12 to control the bending direction of the control section 12.

[0076] The intermediate layer 16 in the present application is adapted to be implemented as a spiral structure, a mesh structure, a snake bone or other flexible structure.

[0077] In this embodiment, the intermediate layer 16 is a spring ring. The curved section 11 comprises a curved piece 112, which constitutes the intermediate layer of the curved section 11. The curved piece 112 is implemented as a spring ring in this embodiment, which is in a natural curved state.

[0078] The control section 12 comprises a control member 121, which is implemented as a spring ring, and the density of the spring ring layer of the control member 121 is less than that of the spring ring layer of the bending member 111. That is, the spring ring of the control member 121 is sparser than that of the bending member 111, so that a greater angle, a greater degree of freedom of bending, and a more labor-saving adjustment of the orientation of the curved surface 111 of the bending section 11 can be achieved.

[0079] The bending member 111 and the control member 121 constitute the part of the intermediate layer 16 located between the bending section 11 and the control section 12.

[0080] In addition, the control member 121 is in an upright state in a natural state, and the bending direction of the control section 12 is changed by applying an external force.

[0081] In the present embodiment, the spring ring of the upright section 13 is the densest, the spring ring of the control section 12 is the sparsest, and the spring ring of the bending section 11 is between the two. The denser upright section 13 can ensure the strength of the bendable urinary sheath 10, the sparser control section 12 can achieve omnidirectional turning, and the turning of the bending section 11 can be controlled in a more labor-saving manner; on the basis of ensuring the strength and the preset curvature, the bending angle of the bending section 11 can be further changed around the preset curvature and can be controllably switched.

[0082] Referring to FIGS. 7 and 8, a second preferred embodiment of the present application is shown. In the present embodiment, the bendable urinary sheath 10A comprises a bending section 11A, a control section 12A, and an upright section 13A, wherein the control section 12A is connected between the bending section 11A and the upright section 13A, and the three are preferably integrally formed. The bending section 11A is located at the front end of the control section 12A, and the upright section 13A is located at the rear end of the control section 12A.

[0083] The bendable urinary sheath 10A further comprises an outer wall 14A, an inner wall 15A, and an intermediate layer 16A, and the outer wall 14A and the inner wall 15A are respectively attached to the inner and outer sides of the intermediate layer 16A.

[0084] The intermediate layer 16A extends from the rear end of the upright section 13A to the front end of the bending section 11A, forming the intermediate layer of the upright section 13A, the control section 12A, and the bending section 11A, that is, the intermediate layer of the upright section 13A, the control section 12A, and the bending section 11A is integrally formed after being connected, forming the intermediate layer 16A.

[0085] The outer wall 14A and the inner wall 15A are formed by extending the outer wall and the inner wall of the upright section 13A, the control section 12A and the curved section 11A from the rear end of the upright section 13A to the front end of the curved section 11A, respectively, and then integrally connecting the outer wall and the inner wall of the upright section 13A, the control section 12A and the curved section 11A, respectively, to form the outer wall 14A and the inner wall 15A.

[0086] In the present embodiment, the intermediate layer 16A is implemented in a mesh form, wherein the intermediate layer 16A comprises a plurality of mesh holes 161A and a plurality of connecting points 162A, and adjacent mesh holes 161A are connected by the connecting points 162A. The intermediate layer 16A is adapted to bend by changing the size and shape of the mesh holes 161A and the connecting points 162A.

[0087] Each mesh hole 161A is composed of four mesh hole lines 163A, and adjacent mesh holes 161A share one mesh hole line 163A. The mesh hole lines 163A of each mesh hole 161A are connected by the connecting points 162A. In the present embodiment, the mesh holes 161A are quadrilaterals or rhombuses. Those skilled in the art can understand that the mesh holes 161A can also be implemented in a triangular, pentagonal or hexagonal form.

[0088] During bending, the mesh holes 161A can deform, and the positions of the mesh hole lines 163A and the connecting points 162A can change to change the size and shape of the mesh holes 161A. The change in the size and shape of the mesh holes 161A makes the bending of the bendable urinary sheath 10A more flexible and controllable.

[0089] The intermediate layer 16A further comprises a plurality of reinforcing members 164A, which are located in the mesh holes 161A and connected between two connecting points 162A at opposite ends of the mesh holes 161A. The reinforcing members 164A divide the mesh holes 161A into two parts. The reinforcing members 164A prevent the mesh holes 161A from deforming too much during bending, which can cause the entire bendable urinary sheath 10A to expand excessively and damage human organs.

[0090] The reinforcing members 164A are arranged at intervals in the mesh holes 161A, that is, the mesh holes 161A are grouped, and the reinforcing members 164A are arranged at intervals in each group. For example, one reinforcing member 164A is arranged every two mesh holes 161A in the longitudinal direction, one reinforcing member 164A is arranged every two mesh holes 161A in the lateral direction, and the reinforcing members 164A in the longitudinal direction and the lateral direction are staggered to form a uniform structure. The arrangement of the reinforcing members 164A at intervals can prevent the mesh holes 164A from being divided into too many parts, which can affect the bending.

[0091] Therefore, the reinforcing members 164A not only make the middle layer 16A stronger, but also do not affect the bending and deformation of the middle layer 16A, and can prevent the deformation from being too large.

[0092] The mesh holes 161A, the connecting points 162A, the mesh hole lines 163A, and the reinforcing members 164A are preferably integrally formed. The connecting points 162A are the intersection points between the mesh hole lines 163A, and the mesh hole lines 163A are connected by intersecting to form the mesh holes 161A. The mesh hole lines 163A and the reinforcing members 164A are preferably made of steel wire, which can ensure the strength and can be bent repeatedly.

[0093] It is worth mentioning that the mesh hole density of the bending section 11A is greater than that of the control section 12A, and the mesh hole density of the upright section 13A is greater than that of the bending section 11A, so as to ensure the omnidirectional bending of the control section 12A and the strength of the upright section 13A and the further adjustment of the bending angle of the bending section 11A.

[0094] Referring to FIGS. 9 and 10, in the present embodiment, the bending control mode of the control section 12 / 12A in the above embodiment is deformed, so that the control section 12B can be actively bent.

[0095] In the present embodiment, the bendable urinary sheath 10B includes a bending section 11B, a control section 12B, an upright section 13B, and a holding section 130B. The two ends of the control section 12B are connected to the rear end of the bending section 11B and the front end of the upright section 13B, respectively. The holding section 130B is connected to the rear part of the upright section 13B.

[0096] The outer wall and the inner wall of the bending section 11B, the control section 12B, and the upright section 13B are made of smooth material or coated with a hydrophilic coating. The middle layer forms a spiral structure or a mesh structure in the middle part of the bending section 11B, the control section 12B, and the upright section 13B.

[0097] The bendable urinary sheath 10B further comprises an adjusting unit 18B, which is adapted to control the bending of the control section 12B and adjust the bending direction of the control section 12B.

[0098] The adjusting unit 18B comprises at least three adjusting lines 181B and at least three adjusting members 182B, the adjusting members 182B correspond to the adjusting lines 181B, the adjusting members 182B are arranged at the tail end of the upright section 13B, and the adjusting lines 181B are connected between the control section 12B and the adjusting members 182B to control the length of each adjusting line 181B respectively, and the bending direction of the control section 12B is changed by the different degrees of length change of each adjusting line 181B.

[0099] In the present application, the bending section 11B, the control section 12B and the upright section 13B are all cylindrical structures.

[0100] The front ends of the adjusting lines 181B are arranged at intervals around the control section 12B. Referring to FIG. 9, three adjusting lines 181B are implemented, and the three adjusting lines 181B are uniformly arranged on the circumferential side of the control section 12B, i.e. one adjusting line 181B is arranged at intervals of 120° on the circumferential side of the control section 12B. When the lengths of the three adjusting lines 181B are different, the bending direction of the control section 12B is different, and the bending direction of the control section 12B is changed by alternately changing the lengths of the adjusting lines 181B.

[0101] When the bending direction of the control section 12B is changed, the bending section 11B is driven to move, so that the bending section 11B bends along with the bending of the control section 12B, and the orientation of the arc surface 111B of the bending section 11B is changed. When the control section 12B can bend in all directions, the orientation of the arc surface 111B of the bending section 11B can also be changed by 360°, and thus the lesion area of each part of the kidney can be reached.

[0102] The number of the adjusting lines 181B can also be changed. Referring to FIG. 10, four adjusting lines 181B and four adjusting members 182B are implemented, the four adjusting lines 181B are uniformly arranged on the circumferential side of the control section 12B, and are controlled by the four adjusting members 182B respectively, so that the control section 12B bends in all directions, or in other words, the control section 12B can bend and turn by 360°.

[0103] Those skilled in the art can understand that the number of the adjusting lines 181B and the adjusting members 182B can also be implemented as other numbers, and is not limited to the above embodiments.

[0104] It is worth mentioning that under the concept of the present application, the bending of the control section is not limited to the above-mentioned embodiments, and can also be achieved by other ways, so that the preset curvature direction of the bending section can be changed to better meet the clinical needs.

[0105] More worth mentioning is that in all the above-mentioned embodiments of the present application, the middle layer of the upright section 13 / 13A / 13B can also not be provided with a spiral structure or a reticular structure, and can be made of other materials and can flow out of the working channel. For example, made of rubber, which has strong toughness, can not only ensure strength and meet strength requirements, but also has certain elasticity and can be appropriately bent to adapt to the structure of the urethra, bladder and ureter of the human body.

[0106] Referring to FIG. 11, on the basis of the above-mentioned embodiments, the bendable urinary sheath 10C of the present fourth embodiment comprises a bending section 11C and a main section 19C, and the main section 19C is connected to the rear end of the bending section 11C.

[0107] In a natural state, the bending section 11C is in a curved state and has an arc surface 111C and a preset curvature, and the main section 19C is in a straight or nearly straight state. The working channel 100C penetrates through the bending section 11C and the main section 19C to detachably assemble an endoscope and can serve as a suction and exhaust channel.

[0108] The rear end of the main section 19C is provided with a connecting element 191C, which is adapted to be connected with the operating end of the endoscope. When the front end of the endoscope is assembled into the working channel 100C, the operating end of the endoscope is detachably connected to the bendable urinary sheath through the connecting element 191C.

[0109] The connecting element 191C is adapted to be integrally formed with the main section 19C, and is also adapted to serve as an intermediate connecting piece to connect the two.

[0110] The same as the above-mentioned embodiments, the bending section 11C and the main section 19C are both spiral structures. The number of spiral layers of the bending section 11C is sparser than that of the main section 19C, and the sparser spiral layer number helps to ensure the adjustment of the bending angle and the bending direction of the bending section 11C, and the denser spiral layer number helps to ensure the strength of the main section 19C.

[0111] The bending section 11C and the main section 19C can also adopt a mesh structure, and the mesh density of the bending section 11C is less than that of the main section 19C. That is, the mesh size of the bending section 11C is larger, the number of meshes in the same size area is less, and the meshes are sparse, so the mesh density is small; the mesh size of the main section 19C is smaller, the number of meshes in the same size area is more, and the meshes are tight, so the mesh density is large.

[0112] The outer wall and the inner wall of the bending section 11C and the main section 19C are made of or coated with a hydrophilic coating.

[0113] In this embodiment, the intermediate layer 16C is a spring ring or a steel wire mesh.

[0114] When the endoscope is inserted into the bendable urinary sheath through the working channel 100C, the actively bending endoscope is suitable for moving the bending section 11C, thereby adjusting the bending angle and bending direction of the bending section 11C to reach various positions of the kidney. That is, the bending of the endoscope is adjusted to drive the bending section 11C to further bend when bending, and the bending angle and direction of the curved surface 111C of the bending section 11C are changed by the steering and angle adjustment of the endoscope. Thus, various positions of the kidney can be reached to meet more clinical needs.

[0115] It should be understood by those skilled in the art that the embodiments of the application described above and shown in the drawings are only examples and do not limit the application. The purpose of the application has been fully and effectively achieved. The function and structural principle of the application has been shown and explained in the embodiments, and the embodiments of the application can be any modification or modification without departing from the principle.

Claims

1. A flexible urinary sheath characterized by, comprising: a straight section; a curved section, the curved section having an arc surface, the arc surface making the curved section have a preset curvature in a natural state, the curved end being located at a head end of the flexible urinary sheath, the curved end having a first state, in the first state, the curved section is curved at a preset curvature, the preset curvature being determined by a curvature of a body channel in a human body; and a control section, two ends of the control section being connected to a rear end of the curved section and a front end of the straight section respectively, the curved section changing the orientation of the arc surface by changing the bending direction of the control section through an external force, so that the curved section reaches each position of the kidney.

2. The flexible urinary sheath according to claim 1, further comprising a working channel, the working channel being formed through the curved section, the control section and the straight section, an endoscope being adapted to be detachably arranged in the working channel and control the bending of the curved section and the control section to change the orientation of the arc surface.

3. The flexible urinary sheath according to claim 2, wherein the curved section comprises a curved member, the control section comprises a control member, the control member being connected to a rear end of the curved member, the curved member being driven to move by bending the control member through an external force, the orientation of the arc surface of the curved member changing with the bending direction of the control member.

4. The flexible urinary sheath according to claim 3, wherein the curved member and the control member are both spiral structures, the spiral structure of the curved member being in a curved state in a natural state, the spiral structure of the control member being in a straight state in a natural state.

5. The flexible urinary sheath according to claim 3, wherein the curved member and the control member are both net-like structures, the net-like structure of the curved member being in a curved state in a natural state, the net-like structure of the control member being in a straight state in a natural state.

6. The flexible urinary sheath according to claim 4, wherein the number of spirals of the control member is less than the number of spirals of the curved member, the curved member and the control member both having a hydrophilic outer wall coating on the outside.

7. The flexible urinary sheath according to claim 5, wherein the net-like structure comprises a plurality of mesh lines, a plurality of connection points and a plurality of reinforcing members, the plurality of mesh lines intersecting and connecting through the plurality of connection points to form a plurality of mesh holes, the reinforcing members being arranged in the mesh holes and connected between the connection points, wherein the reinforcing members are arranged in the mesh holes at intervals.

8. The flexible urinary sheath according to claim 7, wherein the mesh density of the control member is less than the mesh density of the curved member, the curved member and the control member both having a hydrophilic outer wall coating on the outside.

9. A flexible urinary sheath characterized by, comprising: An inner wall, an outer wall and an intermediate layer, the inner wall and the outer wall respectively cover the inner and outer sides of the intermediate layer, and form a working channel, so as to detachably install an endoscope and be suitable for suction and exhaust operation through the working channel, wherein the bendable urinary sheath tube further comprises a bending section, a control section and a vertical section, the bending end is located at the head end of the bendable urinary sheath tube, the bending end has a first state, in the first state, the bending section is curved at a preset curvature, the curvature angle of the preset curvature is determined by the curvature angle of the channel in the human body, the control section is connected between the bending section and the vertical section, and the bending section is curved in a natural state, wherein the control section comprises an adjusting unit, the adjusting unit comprises at least three adjusting lines and at least three adjusting pieces, the adjusting pieces are arranged at the tail end of the vertical section, the adjusting lines are uniformly arranged between the control section and the adjusting pieces, and the length of the adjusting lines is changed by adjusting the adjusting pieces to control the bending section to bend in all directions.

10. The bendable urinary sheath tube according to claim 9, wherein the bending section comprises an arc surface, the arc surface forms a preset curvature, and the bending section is driven to bend by the bending of the endoscope to change the curvature angle of the arc surface, the bending of the control section drives the movement of the bending section to change the orientation of the arc surface, so that the outlet of the working channel arranged at the front end of the bending section reaches different positions of the kidney.

11. The bendable urinary sheath tube according to claim 10, wherein the intermediate layer of the bending section and the control section is a spiral structure, the spiral structure of the bending section is curved in a natural state, the control section is vertically arranged in a natural state, and the spiral layer of the bending section is denser than the spiral layer of the control section.

12. The bendable urinary sheath tube according to claim 10, wherein the intermediate layer of the bending section and the control section is a mesh structure, the mesh structure of the bending section is curved in a natural state, the control section is vertically arranged in a natural state, and the number of mesh holes of the bending section is denser than the number of mesh holes of the control section.

13. The bendable urinary sheath tube according to any one of claims 10 to 12, wherein the preset curvature is between 45° and 170°.

14. A flexible urinary sheath characterized by, Comprising: a bending section, the bending section has an arc surface, the arc surface makes the bending section have a preset curvature in a natural state, the bending end is located at the head end of the bendable urinary sheath tube, the bending end has a first state, in the first state, the bending section is curved at a preset curvature, the curvature angle of the preset curvature is determined by the curvature angle of the channel in the human body; a main body section, the main body section is connected to the rear end of the bending section; and a working channel, the working channel is longitudinally arranged between the bending section and the main body section, so as to detachably install an endoscope, the bending of the endoscope drives the movement of the bending section, so as to adjust the curvature angle of the bending section and the orientation of the arc surface.

15. The flexible urethral sheath according to claim 14, wherein the intermediate layer of the bending section and the main section are both spiral structures, and the spiral layer of the bending section is sparser than the spiral layer of the main section.

16. The flexible urethral sheath according to claim 14, wherein the intermediate layer of the bending section and the main section are both net structures, comprising a plurality of net hole lines and a plurality of net holes formed by the intersection of the net hole lines, and the net holes of the bending section are sparser than the net holes of the main section.

17. The flexible urethral sheath according to any one of claims 14 to 16, wherein the rear end of the main section is provided with a connecting element, and the connecting element detachably connects the rear end of the upright section with an operating end of an endoscope.

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