A sheath structure, an endoscope assembly, and a method of using the same.

Abstract

This invention provides a sheath structure, an endoscope assembly, and a method of use thereof, belonging to the field of endoscope technology. The sheath structure includes a sheath tube, a curved tube, a pre-formed curved member, and a traction rope. The distal segment of the sheath tube is configured to bend under external force. The curved tube is installed within the distal segment, and its sidewall includes curved portions and mounting portions arranged circumferentially. The pre-formed curved member is installed within the curved tube near the mounting portion, and has a pre-formed shape that bends towards the mounting portion, applying a bending force to the curved tube. The traction rope is connected to the curved portions and is used to drive the curved tube to bend away from the mounting portion. This invention, through the cooperation of the pre-formed curved member and the traction rope, makes the curved tube and sheath tube relatively stable, allowing them to enter the surgical area opening without being squeezed by human tissue. The traction rope controls the degree of bending of the pre-formed curved member to adjust the bending angle of the curved tube, thereby adjusting the surgical field area.

Description

Technical Field

[0001] This invention belongs to the field of endoscope technology, specifically relating to a sheath structure, an endoscope assembly, and a method of using the same. Background Technology

[0002] An endoscope is a medical diagnostic instrument consisting of a handle and an insertion section. The insertion section can be inserted into the body's natural cavities or surgical openings. A camera module located at the distal end of the insertion section allows observation of the body's internal tissues, assisting doctors in diagnosis. By operating the handle located outside the body, the bending angle of the active bending section at the front end of the insertion section can be adjusted, thereby deflecting it in a predetermined direction to obtain a wider field of view.

[0003] When an endoscope is inserted into the human body through natural cavities, a flexible insertion section is typically required. This involves controllable bending of the distal end of the insertion section to allow the camera module at the distal end to enter the curved cavity. However, when the endoscope is inserted through a surgical incision, the tissue compresses the insertion tube as it enters the incision. To ensure the distal end reaches the predetermined position, a rigid insertion section is usually used. However, with this structure, once the distal end reaches the predetermined position, the rigid structure prevents autonomous bending. Therefore, the surgeon can only adjust the surgical field by rotating the rigid insertion section, limiting their field of vision and making it difficult to perform surgery over a large area. Furthermore, forcibly rotating the rigid insertion section can easily tear tissue, increasing trauma to the patient. Summary of the Invention

[0004] The purpose of this application is to provide a sheath structure, an endoscope assembly, and a method of using the same, to solve the aforementioned technical problems existing in the prior art.

[0005] This application is implemented as follows:

[0006] In a first aspect, this application provides a sheath structure including a sheath tube, a curved tube, a pre-formed curved member, and a traction rope. The distal end segment of the sheath tube is configured to bend under external force. The curved tube is installed within the distal end segment, and the sidewall of the curved tube includes curved portions and mounting portions arranged circumferentially thereon. The pre-formed curved member is installed within the curved tube near the mounting portion, and the pre-formed curved member has a pre-formed shape that bends toward the mounting portion, applying a bending force to the curved tube. The traction rope is connected to the curved portion and is used to drive the curved tube to bend in a direction away from the mounting portion.

[0007] In the above technical solution, by setting a pre-fabricated curved component inside the sheath and cooperating with the traction rope, when the traction rope drives the curved tube to bend in a direction away from the installation part, the traction rope is tightened, causing the curved tube to bend in the opposite direction to the installation part. That is, the pre-fabricated curved component bends in the opposite direction to the pre-fabricated direction. The pre-fabricated curved component and the traction rope are mutually taut, and correspondingly, the installation part and the curved part are also mutually taut. After the traction rope is pulled to its limit in the proximal direction, the traction rope can no longer move, thereby fixing the structure of the curved tube. The curved tube cannot bend in either direction, so that when the sheath is inserted into the surgical area opening, even if it is squeezed by human tissue, the structure of the sheath will not change, and it can still move in the preset direction and smoothly enter the target area. The through hole controls the traction rope, which can control the degree of bending of the pre-fabricated curved component in the opposite direction to the pre-fabricated direction, thereby controlling the degree of bending of the curved tube, which facilitates the adjustment of the surgical field angle and facilitates the doctor's operation.

[0008] Furthermore, the bending section includes multiple bending units arranged along the axial direction of the bending tube, and the bending units are connected to the traction rope. When the traction rope drives the bending tube to bend in a direction away from the installation part, any two adjacent bending units of the bending section abut against each other to make the axis of the bending tube straight. After any two adjacent bending units abut against each other, the traction rope can no longer drive the bending section to bend in a direction away from the installation part. At this time, the traction rope and the prefabricated bending component are taut against each other, the bending tube is straight, and it is easier for the doctor to move the bending section in the surgical opening.

[0009] Furthermore, the bending section includes multiple bending units arranged along the axial direction of the bending tube, and the bending units are connected to the traction rope; there is a bending gap between any two adjacent bending units, and arc-shaped grooves at both ends of the bending gap along the circumference of the bending tube. When the prefabricated bending component applies bending force to the bending tube, the bending section is straightened, and the bending gap between two adjacent bending units of the bending section increases. The arc-shaped grooves can ensure that the bending tube maintains a good overall shape after multiple bends, and will not open or break at the connection between two adjacent bending units.

[0010] Furthermore, the bending section includes multiple bending units arranged along the axial direction of the bending tube. The bending units are connected to the traction rope, and there is a bending gap between any two adjacent bending units. A partition is provided inside the bending tube, with the bending section and the mounting section on both sides of the partition. The prefabricated bending component is located between the mounting section and the partition. The partition is located adjacent to the end of the bending gap. The partition and the mounting section cooperate to restrict the installation position of the prefabricated bending component, so that the bending direction of the prefabricated bending component is consistent with the bending direction of the bending tube. The partition is located adjacent to the end of the bending gap to enhance the strength and rigidity of the connection between two adjacent bending units, further preventing the connection between two adjacent bending units from breaking.

[0011] Furthermore, the bending section includes multiple bending units arranged along the axial direction of the bending tube, and the bending units are connected to the traction rope; when the axis of the bending tube is in a straight structure, the side wall surfaces of two adjacent bending units are in contact with each other; after the side wall surfaces of two adjacent bending units are in contact with each other, the tightness of the two adjacent bending units can no longer be changed, which is beneficial to stabilizing the straight structure of the bending tube.

[0012] Furthermore, an adsorption sleeve is installed at the distal end of the sheath; the distal end face of the adsorption sleeve is inclined from the distal end to the proximal end along the direction from the mounting part to the bending part; or, the distal end face of the adsorption sleeve is inclined from the distal end to the proximal end along the direction from the bending part to the mounting part, and the inclined end face of the adsorption sleeve can increase the adsorption range of the sheath on the surgical area.

[0013] Furthermore, the bending section includes multiple bending units arranged along the axial direction of the bending tube, and the bending units are connected to the traction rope; each of the multiple bending units is provided with a traction channel for the traction rope to pass through, and / or, any bending unit is a superior arc structure.

[0014] Furthermore, the proximal end of the traction rope is dampedly connected to the proximal end section of the sheath.

[0015] Secondly, this application provides an endoscope assembly, including the sheath structure of any of the foregoing and an endoscope, wherein the insertion portion of the endoscope is used in conjunction with a curved tube.

[0016] Thirdly, this application provides a method for using an endoscope assembly. The specific steps for using the aforementioned endoscope assembly are as follows:

[0017] S1: Insert the active bending section of the insertion part into the inside of the bending tube, and make the active bending section bend toward the side where the mounting part is located. The bending direction of the active bending section must be the same as the pre-bending direction of the pre-bending part inside the sheath.

[0018] S2: Operate the traction rope to drive the bending tube to bend away from the mounting part;

[0019] S3: Insert the sheath structure into the target cavity;

[0020] S4: The distal tube segment of the operating sheath structure enters the target area, the traction rope is operated, the bending angle of the bending tube is controlled, and the bending of the active bending segment is controlled by the bending of the bending tube.

[0021] The beneficial effects of this invention are:

[0022] 1. In this invention, by setting a pre-made bending component and a traction rope to cooperate with each other, when the traction rope drives the bending tube to bend in a direction away from the installation part, it also drives the pre-made bending component to bend in a direction away from its pre-made direction. However, due to the pre-made shape of the pre-made bending component, the pre-made bending component will cause the bending tube to tend to bend in the pre-made direction of the pre-made bending component. The bending part of the bending tube is pulled by the traction rope. When the traction rope reaches the limit position, the two sides of the bending tube are tightened by the pre-made bending component and the traction rope, thereby making the structure of the bending tube relatively stable, causing the bending tube and the sheath to form a rigid structure, which does not deform under the pressure of human tissue and can pass smoothly through the surgical area opening.

[0023] 2. In this invention, by controlling the pulling effect of the traction rope on the curved part, the degree of bending of the prefabricated curved part in its prefabricated direction is controlled, and the bending angle of the curved tube is adjusted. The bending angle of the curved tube can be flexibly adjusted within the surgical target area, which facilitates the adjustment of the viewing angle of the surgical field area and makes it easier for doctors to perform surgical operations.

[0024] 3. In this invention, the bending angle of the active bending section is adjusted by adjusting the bending angle of the bending tube. The bending angle adjustment mechanism of the sheath structure and the bending angle adjustment mechanism of the active bending section are combined together. When making an incision in the surgical area and when adjusting the surgical field range in the surgical area, only the bending angle adjustment mechanism of the sheath structure needs to be operated, which simplifies the operation steps of the endoscope and improves the ease of use of the endoscope.

[0025] 4. In this invention, by setting the bending part as multiple bending units arranged along the axial direction of the bending tube, when any two adjacent bending units are pressed together, the axis of the bending tube is in a straight line state, which makes it easier for the sheath structure to be inserted into the surgical opening. At the same time, after the adjacent bending units are pressed together, the length of the bending part will not be shortened under the drive of the traction rope, which helps to improve the structural stability of the bending tube when it is tightened by the prefabricated bending parts and the traction rope. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 These are schematic diagrams of the sheath structure provided in some embodiments of this application;

[0028] Figure 2 This is a schematic diagram showing the disassembled sheath structure provided in some embodiments of this application;

[0029] Figure 3 This application Figure 2 Detailed image of point A provided;

[0030] Figure 4 This is a structural schematic diagram of a curved tube with a straight axis provided in some embodiments of this application;

[0031] Figure 5 This is a schematic diagram of the structure of a bent tube as provided in some embodiments of this application, which is bent by the bending action of a prefabricated bending member;

[0032] Figure 6 This is a schematic diagram of the structure of a bent tube provided in some embodiments of this application;

[0033] Figure 7 This application Figure 6 Detailed image of point B provided;

[0034] Figure 8 These are schematic diagrams of the bending unit provided in some embodiments of this application;

[0035] Figure 9 This is a schematic diagram illustrating the structural changes of a bent tube under the drive of a traction rope, provided in some embodiments of this application.

[0036] Figure 10 This is a schematic diagram of the structural changes of a prefabricated bent component under the drive of a traction rope, provided in some embodiments of this application;

[0037] Figure 11 This is a flowchart illustrating the usage of an endoscope assembly provided in some embodiments of this application.

[0038] 100-Sheath, 110-Distal tube segment, 120-Proximal tube segment, 200-Bent tube, 210-Bent section, 211-Bent unit, 211a-Side wall, 212-Bent gap, 212a-Arc groove, 220-Mounting part, 230-Baffle, 240-Traction channel, 300-Prefabricated bent component, 400-Traction rope, 500-Adsorption sleeve. Detailed Implementation

[0039] The following description provides many different embodiments or examples for implementing various features of the invention. The elements and arrangements described in the specific examples below are only for concise expression of the invention and are merely examples, not intended to limit the invention.

[0040] It should be noted that in the various embodiments of this application, "proximal end" and "distal end" refer to the position of the endoscope and its accessories relative to the user in the usage environment. The end closer to the user is designated as the "proximal end", and the end farther from the user is designated as the "distal end".

[0041] There are generally two surgical methods for treating kidney stones: the antegrade method and the retrograde method. The antegrade method involves inserting a nephroscope into the kidney through the ureter to remove the stones. This method treats the stones through the body's natural cavities, which has the advantages of minimal trauma, rapid recovery, and definite curative effect. For patients who are not suitable for the antegrade method, the retrograde method is often used. The retrograde method involves making a puncture in the lumbar region, through which the nephroscope is inserted into the kidney. The kidney stones are then broken up and removed using lithotripsy tools such as lasers and ultrasound. During the retrograde method, because the body tissue is closed after the puncture, if the sheath is a soft structure, it will be squeezed by the body tissue and difficult to insert directly into the renal pelvis. Therefore, a rigid sheath is needed to be inserted into the renal pelvis through the puncture to establish a surgical channel before the nephroscope can be used to operate on the stones in the renal pelvis. However, the rigid sheath cannot be turned voluntarily in the renal pelvis and cannot properly adjust the field of view.

[0042] In view of this, some embodiments of this application provide a sheath structure that can be adjusted as needed to be a rigid structure or a flexible structure that can be bent under external force. When it needs to be inserted into the surgical opening, the sheath is adjusted to be rigid to facilitate insertion into the surgical opening. After the sheath is successfully inserted into the surgical area, it is adjusted to a flexible structure that can be bent under external force, which allows the operator to adjust the bending angle of the active bending section of the endoscope insertion part normally to obtain a larger surgical field. This sheath structure is applied to endoscopes. In addition to nephroscopes, the endoscopes in the embodiments of this application can also be bronchoscopes, esophagoscopes, gastroscopes, colonoscopes, otoscopes, rhinoscopes, oral endoscopes, laryngoscopes, colposcopes, laparoscopes, arthroscopes, etc.

[0043] Combination Figures 1 to 10 As shown, some embodiments of this application provide a sheath structure including a sheath tube 100, a curved tube 200, a pre-formed curved member 300, and a traction rope 400. The distal end section 110 of the sheath tube 100 is configured to bend under external force. The curved tube 200 is installed inside the distal end section 110. The sidewall of the curved tube 200 includes curved portions 210 arranged circumferentially thereon and mounting portions 220. The pre-formed curved member 300 is installed inside the curved tube 200 and located near the mounting portion 220. The 00 has a prefabricated shape that bends toward the mounting portion 220. A bending force can be applied to the bending tube 200 so that the bending tube 200 bends toward the mounting portion 220 together with the prefabricated bending member 300. The traction rope 400 is connected to the bending portion 210 and can drive the bending tube 200 to bend in a direction away from the mounting portion 220, so that the prefabricated bending member 300 bends in a direction opposite to its prefabricated direction. The prefabricated direction of the prefabricated bending member 300 refers to the bending direction of the prefabricated shape of the prefabricated bending member 300.

[0044] In its natural state, the pre-formed bending member 300 applies a bending force to the bending tube 200, causing both the bending tube 200 and the sheath tube 100 to bend together. This allows both the sheath tube 100 and the bending tube 200 to bend according to the pre-formed shape of the pre-formed bending member 300. The traction rope 400, located at the bending section 210, can be moved towards the proximal end under external force, pulling the bending section 210 and causing the bending tube 200 to bend away from the mounting section 220. Figure 9 As shown, this changes the bending shape of the curved tube 200 and the sheath 100, thereby adjusting the bending angle of the curved tube 200 and the sheath 100 and improving the surgical field area.

[0045] For the precast bent component 300, when the bent tube 200 bends in a direction away from the mounting portion 220, it will cause the precast bent component 300 to bend in a direction opposite to its precast direction, combined with Figure 10 As shown, however, due to the limitations of the prefabricated shape of the prefabricated bending member 300, the prefabricated bending member 300 will always cause the bending tube 200 to tend to bend in the prefabricated direction. The bent portion 210 of the bending tube 200 is pulled by the traction rope 400. Both sides of the bending tube 200 are simultaneously acted upon by the prefabricated bending member 300 and the traction rope 400. When the traction rope 400 is pulled to its limit, that is, when the traction rope 400 can no longer pull the bent portion 210, the bending tube 200 can no longer bend in the direction away from the mounting portion 220. Then, the two sides of the bending tube 200 are controlled by the prefabricated bending member 300. The traction rope 400 and the bending tube 200 are tightened, thereby fixing the structure of the bending tube 200 and preventing it from bending in any direction. This makes the bending tube 200 and the sheath 100 sleeved outside the bending tube 200 form a rigid structure, which can smoothly pass through the surgical opening and enter the target surgical area. Specifically, the proximal end of the traction rope 400 can be dampedly connected to the proximal tube segment 120 of the sheath 100. After pulling the traction rope 400, the position of the traction rope 400 can remain stable, avoiding loosening and improving the stability of the traction rope 400 when pulling the bending part 210.

[0046] When the sheath 100 enters the surgical area through the incision, even if it is compressed by human tissue, the sheath 100's shape and structure cannot be changed as long as the traction rope 400 remains in place, due to the combined effect of the pre-made bending component 300 and the traction rope 400. The compression from human tissue will not affect the structure of the sheath 100, allowing it to smoothly enter the target surgical area. Once the sheath 100 has entered the target surgical area, the traction rope 400 can be loosened and its position adjusted. As the traction rope 400 loosens, the pre-made bending component 300 bends in the pre-designed direction, simultaneously bending the sheath 100 and the bending tube 200. By adjusting the length of the traction rope 400, the degree of bending of the pre-made bending component 300 in the pre-designed direction can be controlled, thereby controlling the bending angle of the bending tube 200 and the sheath 100. This facilitates adjustment of the surgical field's viewing angle and allows the surgeon to perform the operation more easily.

[0047] The sheath structure provided in this application can smoothly intervene in the surgical area opening while also being able to bend normally within the target area to adjust the surgical field range. Furthermore, the function of the active bending segment of the endoscope is integrated into the sheath structure. From entering the surgical area opening to subsequent adjustment of the surgical field range, only the traction rope 400 of the sheath structure needs to be operated, which simplifies the use of the endoscope and improves the ease of use.

[0048] In some embodiments, the bending portion 210 may be made of an elastic material. When the pre-formed bending member 300 bends in the pre-formed direction, a portion of the bending portion 210 is stretched and tightened. When the traction rope 400 is pulled, the bending portion 210 may also be compressed to adapt to the bending of the bending tube 200.

[0049] In some embodiments, slits may be cut into the bend 210 to divide it into multiple bending units 211, thereby improving the extension effect of the bend 210. When the bent tube 200 bends following the pre-formed bending member 300, the bend 210 can bend in conjunction with the pre-formed bending member 300, thus combining... Figures 3 to 8As shown, the bending section 210 includes multiple bending units 211 arranged along the axial direction of the bending tube 200. To increase the bending angle of the bending tube 200, the bending unit 211 can be configured as a superior arc structure. The traction rope 400 is connected to one or more bending units 211, and the connection method can be a fixed connection or a sliding connection. The distal end of the traction rope 400 can be fixed to one of the bending units 211, or it can be fixed to other components connected to the distal end of the bending tube 200, such as the suction sleeve 500. To improve the control effect of the traction rope 400 on the bending unit 211, a traction channel 2 for the traction rope 400 to pass through can be provided on each bending unit 211. 40; By pulling the traction rope 400, the position of the bending unit 211 of the bending part 210 is controlled. When the bending tube 200 is driven to bend away from the mounting part 220 by the traction rope 400, as the traction rope 400 is pulled, any two adjacent bending units 211 of the bending part 210 will abut against each other. The traction rope 400 will no longer be able to drive the bending tube 200 to bend away from the mounting part 220, so that the length of the bending part 210 along the axial direction of the bending tube 200 is minimized. At this time, the axis of the bending tube 200 is a straight structure, that is, the sheath tube 100 outside the bending tube 200 has a straight tube section structure, which makes it easier to enter the surgical area opening.

[0050] In other embodiments, driven by the traction rope 400, when any two adjacent bending units 211 of the bending section 210 abut together, the axis of the bending tube 200 may not be a straight structure. Figure 6 As shown, the multiple bending units 211 of the bending section 210 are arranged to protrude towards the adjacent bending unit 211 at the position near the connection with the mounting section 220. When the traction rope 400 pulls the bending section 210, the protruding parts of the bending units 211 first abut together, and then the parts without protrusions. When two adjacent bending units 211 are pressed together, the axis of the bending tube 200 is also a curved structure. At this time, the bending angle of the curved structure is stable and is not affected by the compression of human tissue, and can also smoothly enter the target area.

[0051] Preferably, when the bending portion 210 includes multiple bending units 211 arranged axially along the bending tube 200, the bending portion 210 is stretched and extended when the pre-formed bending member 300 drives the bending tube 200 to bend towards the mounting portion 220, causing separation between adjacent bending units 211. The root position where the two bending units 211 connect is prone to cracking under the bending force applied by the pre-formed bending member 300. To avoid cracking, in some embodiments, an arc-shaped groove 212a can be provided, combined with... Figure 7As shown, there is a bending gap 212 between any two adjacent bending units 211. When the bending tube 200 bends in the direction away from the mounting part 220, the bending gap 212 increases. When the bending tube 200 bends in the direction of the mounting part 220, the bending gap 212 decreases or even shrinks to zero. Along the circumference of the bending tube 200, there are arc grooves 212a at both ends of the bending gap 212. That is, there are arc grooves 212a at the intersection of two adjacent bending units 211. When the bending tube 200 bends in the direction of the mounting part 220, the adjacent bending units 211 separate and the bending gap 212 increases. The arc grooves 212a can buffer the separation of the adjacent bending units 211 to a certain extent, so as to ensure that the bending tube 200 maintains a good overall shape after multiple bends and will not crack at the position of the arc grooves 212a.

[0052] Since the bending of the bent tube 200 is mainly driven by the prefabricated bending member 300, a baffle 230 is provided inside the bent tube 200 to improve the driving effect of the prefabricated bending member 300 on the bent tube 200. Figure 7 As shown, the partition 230 has a bending section 210 and a mounting section 220 on both sides. The pre-made bending member 300 is installed in the cavity formed by the mounting section 220 and the partition 230. The outer wall of the pre-made bending member 300 is in contact with the surface of the partition 230 and the inner side of the mounting section 220. With this structure, the bending force of the pre-made bending member 300 can be accurately and smoothly transmitted to the bending tube 200, improving the accuracy of the bending angle when the bending tube 200 is bent. In addition, since the partition 230 is provided in the bending tube 200, the partition 230 is provided adjacent to the end of the bending gap 212. When the end of the bending gap 212 is provided with an arc groove 212a, the partition 230 can be provided adjacent to the arc groove 212a, improving the strength and rigidity of the connection between two adjacent bending units 211, and further avoiding the occurrence of cracks at the connection junction of two adjacent bending units 211.

[0053] When the sheath structure of this application is used, it needs to maintain a stable structure when entering the surgical area. Therefore, in order to make the structure more stable when the multiple bending units 211 of the bending part 210 are pressed together when the traction rope 400 is tightened, in some embodiments of this application, when the axis of the bending tube 200 is in a straight line structure, the corresponding sidewalls 211a of two adjacent bending units 211 are in contact with each other. The corresponding sidewalls 211a refer to the sidewalls 211a of two adjacent bending units 211 that are close to each other. When two adjacent bending units 211 are pressed together, the corresponding sidewalls 211a are in contact with each other, and the pressing state of the two adjacent bending units 211 cannot be changed, nor will the relative position of the two adjacent bending units 211 change. This is beneficial to improving the overall structural stability when the axis of the bending tube 200 is in a straight line structure.

[0054] In some embodiments, the line connecting the two ends of the sidewall 211a lies on the radial section of the bent pipe 200, which does not affect the normal bending of the bent pipe 200. Figure 8 As shown, the sidewall 211a can be a planar structure or a curved structure. The planar sidewall 211a can be quickly pressed together, while the curved sidewall 211a can restrict the radial position of the bending unit 211 while pressing together, further stabilizing the overall structural stability when the axis of the bending tube 200 is in a straight structure.

[0055] When the active bending section is inserted into the sheath 100, it is inserted into the bending tube 200 near the bending portion 210. The gap between the outer wall of the active bending section and the inner wall of the bending tube 200 serves as the main suction channel during the procedure. To facilitate the adsorption of impurities that occur during the procedure, an adsorption sleeve 500 is fitted onto the distal end of the sheath 100. The distal end face of the adsorption sleeve 500 is inclined. In some embodiments, the distal end face of the adsorption sleeve 500 is inclined from the distal end to the proximal end along the direction from the mounting portion 220 to the bending portion 210. Figure 1 As shown, the lowest point of the distal end face of the adsorption sleeve 500 is close to the bend 210. When the adsorption channel is adsorbing, it can adsorb the substance more quickly. In addition, the inclined surface of the adsorption sleeve 500 expands the adsorption range and enhances the adsorption effect of the adsorption channel. However, when the inclined surface of the adsorption sleeve 500 is set away from the ground, the impurities to be adsorbed may accumulate between the end of the pre-made bend 300 and the inner wall of the adsorption sleeve 500. This position is difficult to be adsorbed, resulting in adsorption difficulties. Therefore, in some embodiments, the distal end face of the adsorption sleeve 500 can be set in the opposite direction, that is, the distal end face of the adsorption sleeve 500 is inclined from the distal end to the proximal end along the direction from the bend 210 to the mounting part 220. The lowest point of the distal end face of the adsorption sleeve 500 is close to the mounting part 220 to avoid the phenomenon of impurity accumulation on the inner wall of the adsorption sleeve 500.

[0056] Embodiments of this application also provide an endoscope assembly, including the sheath structure of any of the foregoing and an endoscope, wherein the insertion part of the endoscope is used in conjunction with the curved tube 200, and during installation, the active bending section of the insertion part is located inside the curved tube 200 and is restricted by the structure of the curved tube 200.

[0057] Embodiments of this application also provide a method of using an endoscope assembly, wherein the specific method of use is combined with the aforementioned endoscope assembly. Figure 11 As shown, the specific usage steps are as follows:

[0058] S1: Insert the active bending section of the insertion part into the bending tube 200, and make the active bending section bend toward the side where the mounting part 220 is located. The active bending section is a structure that can be bent under external force. Generally, the active bending section has two bending directions. One of the bending directions of the active bending section should be the same as the pre-bending direction of the pre-bending part 300, so that the bending of the active bending section can be adjusted by bending the bending tube 200. If the bending direction of the active bending section is misaligned with the bending direction of the bending tube 200, the bending tube 200 will not be able to bend.

[0059] S2: Operate the traction rope 400 to drive the bending tube 200 to bend in the direction away from the mounting part 220, so that the traction rope 400 can no longer pull the bending part 210 and the bending tube 200 can no longer bend in the direction away from the mounting part 220. The two sides of the bending tube 200 are tightened by the prefabricated bending parts 300 and the traction rope 400, so that the bending tube 200 structure is stable, forming a rigid structure that can withstand the compression of human tissue.

[0060] S3: Insert the sheath structure into the target cavity and move the sheath structure toward the target area;

[0061] S4: The distal tube segment 110 of the sheath structure is inserted into the target area. The traction rope 400 is operated to control the bending angle of the bending tube 200. In this embodiment, there is no need to switch from the control of the sheath structure to the control of the active bending segment. Whether the sheath structure enters the target cavity, the surgical area is opened, or the surgical field is adjusted by bending in the target area, only the sheath structure needs to be adjusted. This embodiment combines the control of the sheath structure with the control of the active bending segment. The bending of the active bending segment is controlled by controlling the bending angle of the bending tube 200 in the sheath structure, thereby changing the field of view in the target area and improving the convenience of endoscopic operation. At the same time, the sheath structure can smoothly intervene in the surgical area opening and smoothly bend and move in the target area during the operation.

[0062] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A sheath structure, characterized in that, include: The sheath (100) has a distal section (110) configured to bend under external force; A curved pipe (200) is installed in a distal pipe section (110), the sidewall of the curved pipe (200) including a curved portion (210) arranged circumferentially thereon and a mounting portion (220). A pre-formed bending member (300) is installed inside the bending tube (200) near the mounting portion (220). The pre-formed bending member (300) has a pre-formed shape that bends toward the mounting portion (220) and applies a bending force to the bending tube (200). A traction rope (400) is connected to the bending portion (210) and is used to drive the bending tube (200) to bend in a direction away from the mounting portion (220). The bending section (210) includes a plurality of bending units (211) arranged axially along the bending tube (200), and the bending units (211) are connected to the traction rope (400); When the traction rope (400) drives the bending tube (200) to bend in a direction away from the mounting part (220), any two adjacent bending units (211) of the bending part (210) abut against each other so that the axis of the bending tube (200) is in a straight structure.

2. The sheath structure according to claim 1, characterized in that, The bending section (210) includes a plurality of bending units (211) arranged axially along the bending tube (200), and the bending units (211) are connected to the traction rope (400); There is a bending gap (212) between any two adjacent bending units (211), and the two ends of the bending gap (212) have arc grooves (212a) along the circumference of the bending tube (200).

3. The sheath structure according to claim 1, characterized in that, The bending section (210) includes a plurality of bending units (211) arranged along the axial direction of the bending tube (200), the bending units (211) being connected to the traction rope (400), and a bending gap (212) between any two adjacent bending units (211). A partition (230) is provided inside the bent tube (200), with the bent portion (210) and the mounting portion (220) on both sides of the partition (230), and the prefabricated bent component (300) located between the mounting portion (220) and the partition (230); The partition (230) is disposed adjacent to the end of the curved slit (212).

4. The sheath structure according to claim 1, characterized in that, The bending section (210) includes a plurality of bending units (211) arranged axially along the bending tube (200), and the bending units (211) are connected to the traction rope (400); When the axis of the bent tube (200) is in a straight structure, the sidewalls (211a) of two adjacent bent units (211) are in contact with each other.

5. A sheath structure according to claim 1, characterized in that, An adsorption sleeve (500) is installed at the distal end of the sheath (100); the distal end face of the adsorption sleeve (500) is inclined from the distal end to the proximal end along the direction from the mounting portion (220) to the bending portion (210); or, the distal end face of the adsorption sleeve (500) is inclined from the distal end to the proximal end along the direction from the bending portion (210) to the mounting portion (220).

6. A sheath structure according to claim 1, characterized in that, The bending section (210) includes a plurality of bending units (211) arranged axially along the bending tube (200), and the bending units (211) are connected to the traction rope (400); Each of the bending units (211) is provided with a traction channel (240) through which the traction rope (400) passes, and / or any of the bending units (211) is a superior arc structure.

7. A sheath structure according to claim 1, characterized in that, The proximal end of the traction rope (400) is dampedly connected to the proximal end section (120) of the sheath (100).

8. An endoscope assembly, characterized in that, The invention includes the sheath structure according to any one of claims 1-7, and an endoscope, the insertion portion of which is used in conjunction with the curved tube (200).

9. A method of using an endoscope assembly, characterized in that, The specific steps for using the endoscope assembly according to claim 8 are as follows: S1: Insert the active bending section of the insertion part into the inside of the bending tube (200), and make the active bending section bend toward the side where the mounting part (220) is located; S2: Operate the traction rope (400) to drive the bending tube (200) to bend in a direction away from the mounting part (220); S3: Insert the sheath structure into the target cavity; S4: The distal tube segment (110) of the operating sheath structure enters the target area, and the traction rope (400) is operated to control the bending angle of the bending tube (200).

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