A guide sheath, a guide sheath assembly and an insertion device

Abstract

The present invention provides a guide sheath, a guide sheath assembly and an insertion device, which belong to the field of endoscope technology. The guide sheath includes a tube body, a support structure and a driving mechanism; the support structure is movably connected to the tube body, and the driving mechanism is connected to the support structure; at least part of the support structure can extend out of the distal end of the tube body to be plugged into the introduction terminal located at the distal end of the tube body to expand the inner diameter of the introduction terminal, and the area of ​​the introduction terminal corresponding to the light source and the camera module of the insertion part penetrating the tube body is transparent; the driving mechanism is used to drive the support structure to move into the tube body so that the support structure is separated from the introduction terminal. The present application sets a support structure to connect the introduction terminal and the tube body, and the insertion part of the endoscope can be penetrated in the tube body and inserted into the body cavity synchronously with the tube body, thereby saving the insertion steps of the endoscope. Part of the area of ​​the introduction terminal is transparent, which is convenient for the operator to obtain the image information of the cavity and judge the forward direction of the introduction terminal.

Description

Technical Field

[0001] The present invention belongs to the technical field of endoscopes, and in particular relates to a guide sheath, a guide sheath assembly and an insertion device. Background Art

[0002] An endoscope is a commonly used medical device. The endoscope comprises an insertion part. During specific use, the insertion part of the endoscope is inserted into the human body through a human cavity or a surgical incision. A camera module installed at the far end of the insertion part is used to obtain image information of the lesion site to facilitate the doctor's medical operation.

[0003] The insertion part is easy to bend, and the endoscope is generally used in conjunction with a rigid hard endoscope. In the related art, the insertion process of the hard endoscope and the endoscope is cumbersome. First, the hard endoscope needs to be sent into the bladder through the urethra. Next, the guide wire is sent to the renal pelvis through the working channel of the hard endoscope. Then, the hard endoscope is removed from the body, while the guide wire is retained in the urinary tract. Next, the ureteral sheath and the sheath core in the sheath are inserted along the guide wire. After the insertion work is completed, the sheath core is removed, and finally the insertion part of the endoscope is inserted into the body through the ureteral sheath. Moreover, during the entire process, it is easy to cause damage to the human cavity. Summary of the invention

[0004] The purpose of the present application is to provide a guide sheath, a guide sheath assembly and an insertion device to solve the above-mentioned technical problems existing in the prior art.

[0005] This application is implemented as follows:

[0006] In the first aspect, an embodiment of the present application provides a guide sheath for use in an endoscope, the guide sheath comprising a tube body, a support structure and a driving mechanism; the support structure is movably connected to the tube body, and the driving mechanism is connected to the support structure; at least a portion of the support structure can extend beyond the distal end of the tube body to be plugged into an introduction terminal located at the distal end of the tube body to expand the inner diameter of the introduction terminal, and the area of ​​the introduction terminal corresponding to the light source and the camera module of the insertion portion penetrating the tube body is transparent; the driving mechanism is used to drive the support structure to move into the tube body, so that the support structure is separated from the introduction terminal.

[0007] In the second aspect, an embodiment of the present application provides a guide sheath assembly, including an introduction end and the guide sheath provided by the embodiment of the first aspect, the area of ​​the introduction end corresponding to the light source and the camera module of the insertion part penetrating into the tube body is transparent, and the support structure can be inserted into the introduction end when at least part of the support structure extends out of the distal end of the tube body.

[0008] In the third aspect, an embodiment of the present application provides an insertion device, comprising an endoscope and a guide sheath assembly provided in the embodiment of the second aspect, wherein the insertion portion of the endoscope is inserted into the tube body, and the inner diameter of the proximal opening of the introduction terminal is less than or equal to the outer diameter of the insertion portion, so that the introduction terminal can be attached to the outside of the insertion portion during the process of detaching from the support structure.

[0009] The technical solution adopted by the present invention can achieve the following beneficial effects:

[0010] In the present application, a support structure is provided to connect the introduction terminal and the tube body, the introduction terminal is fixed to the tube body, and the tube body is inserted into the human body cavity by utilizing the guiding effect of the introduction terminal, and the insertion portion of the endoscope can be penetrated into the tube body and inserted into the body cavity synchronously with the tube body, thereby saving the insertion steps of the endoscope and simplifying the insertion process; in addition, the area corresponding to the light source and the camera module of the introduction terminal and the insertion portion is transparent, which is conducive to the light source illuminating the interior of the cavity, facilitating the camera module to obtain clear image information in the cavity, and facilitating the operator to judge the forward direction of the introduction terminal according to the graphic information, thereby avoiding the situation where the forward direction of the introduction terminal is wrong and the inner wall of the cavity is damaged; the introduction terminal is fixed to the tube body, and during the insertion process of the introduction terminal, the force on the introduction terminal is borne by the tube body of the guide sheath, thereby avoiding the situation where the introduction terminal causes squeezing of the distal end of the insertion portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments of the present invention or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 This is a schematic diagram of the structure of the guide sheath assembly provided in some embodiments of the present application. Figure 1 ;

[0013] Figure 2 is a cross-sectional view of a guide sheath assembly provided in some embodiments of the present application Figure 1 ;

[0014] Figure 3 This application is about Figure 2 Detailed view of point A;

[0015] Figure 4 is a cross-sectional view of a guide sheath provided in some embodiments of the present application;

[0016] Figure 5 The internal structure of the guide sheath provided in some embodiments of the present application is shown in FIG. Figure 1 ;

[0017] Figure 6 is a schematic diagram of the disassembly of the guide sheath provided in some embodiments of the present application;

[0018] Figure 7 This is a schematic diagram of the structure of the guide sheath assembly provided in some embodiments of the present application. Figure 2 ;

[0019] Figure 8 is a cross-sectional view of a guide sheath assembly provided in some embodiments of the present application Figure 2 ;

[0020] Fig. 9 This application is about Figure 8 Detail of point B;

[0021] Fig.10 The internal structure of the guide sheath provided in some embodiments of the present application is shown in FIG. Figure 2 ;

[0022] Fig.11 is a schematic diagram of the structure of the implantation device provided by the present application;

[0023] Fig.12 This application is about Fig.11 Detail of point C.

[0024] In the figure: 100-tube body, 110-installing groove, 200-support structure, 210-guide surface, 300-driving mechanism, 310-positioning piece, 400-resetting structure, 500-stop structure, 600-introduction end, 700-insertion part, 800-sheath handle, 810-slide groove, 820-damping structure, 900-endoscope handle. DETAILED DESCRIPTION

[0025] The following description provides many different embodiments or examples for implementing different features of the present invention. The components and arrangements described in the following specific examples are only used to simplify the present invention and are only used as examples, not to limit the present invention.

[0026] It should be noted that, in each embodiment of the present application, "proximal end" and "distal end" refer to the position of the endoscope and its accessories relative to the user in the use environment, wherein 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".

[0027] In the related art, during the process of inserting the ureteral sheath and the sheath core inside the sheath tube, the operator performs the insertion operation without any field of vision and can only perform blind insertion. Under the blind insertion condition, the operator can only judge the insertion direction based on experience, which may easily cause damage to the inner wall of the human cavity due to the wrong insertion direction at the narrow or bend part of the human cavity, thereby increasing the risk of surgery.

[0028] In view of this, some embodiments of the present application provide a guide sheath tube for use in an endoscope, referring to Figures 1 to 10 As shown, the guide sheath comprises a tube body 100, a support structure 200 and a drive mechanism 300. The support structure 200 is movably connected to the tube body 100 and can move relative to the tube body 100 to change the relative position of the support structure 200 and the tube body 100. The drive mechanism 300 is connected to the support structure 200 and is used to drive the support structure 200 to move.

[0029] At least a portion of the support structure 200 can extend out of the distal end of the tube 100. Figures 2 to 5 As shown, the portion of the support structure 200 extending out of the distal end of the tube body 100 can cooperate with the introduction end 600 located at the distal end of the tube body 100, and the support structure 200 can be inserted into the introduction end 600 to expand the inner diameter of the introduction end 600 and fix the introduction end 600 to the distal end of the tube body 100. The area of ​​the introduction end 600 corresponding to the light source and the camera module of the insertion part 700 penetrating the tube body 100 is transparent.

[0030] In a specific implementation, the tube body 100 is used to be sleeved outside the insertion part 700 of the endoscope, and the insertion part 700 and the tube body 100 are inserted into the human body cavity together. The introduction end 600 located at the distal end of the tube body 100 plays a guiding role, guiding the tube body 100 to change direction, etc. The area corresponding to the light source and the camera module of the introduction end 600 and the insertion part 700 is transparent, and the transparent structure is conducive to the light emitted by the light source to pass through to illuminate the inner wall of the cavity; and the transparent structure is also conducive to the camera module to obtain the cavity image information in front of the introduction end 600, which is convenient for the operator to judge the insertion direction of the introduction end 600. It can be understood that the area corresponding to the light source and the camera module refers to the area of ​​the introduction end 600 corresponding to the light divergence range of the light source and the area of ​​the introduction end 600 corresponding to the camera range of the camera module in the axial direction of the insertion part 700 when the introduction end 600 is fixed to the tube body 100.

[0031] The introduction end 600 is fixed to the tube body 100 and is inserted into the human body together with the insertion part 700. Through the cooperation of the insertion part 700 and the introduction end 600, clear information inside the cavity is obtained, providing the operator with a clear operating field of view, and facilitating the operator to judge the insertion direction of the introduction end 600, so that the introduction end 600 can move forward in the extension direction of the cavity and protect the inner wall of the cavity from being damaged by the introduction end 600.

[0032] It can be understood that after the support structure 200 is plugged into the introduction end 600, the introduction end 600 will be deformed accordingly, and its inner diameter will expand. The deformed introduction end 600 has a tendency to recover the deformation, so it is sleeved outside the support structure 200 and fixed to the distal end of the tube body 100 by the support structure 200. The introduction end 600 is fixed to the distal end of the tube body 100, and the resistance encountered by the introduction end 600 during the insertion process is borne by the tube body 100, without squeezing the insertion part 700, so that the overall structure of the insertion part 700 can be protected, and each component of the insertion part 700 can operate normally.

[0033] The support structure 200 is movable relative to the tube body 100. The portion of the support structure 200 located outside the distal end of the tube body 100 can be moved into the tube body 100 under the drive of the drive mechanism 300. Figures 7 to 10 As shown, after the support structure 200 moves, the connection between it and the introduction end 600 is released and the two are separated. In this way, the introduction end 600 can be taken out through the internal channel of the tube body 100.

[0034] In specific implementation, before inserting the tube body 100 into the human body cavity, it is necessary to place the introduction end 600 at the distal end of the tube body 100, and then control the position of the support structure 200, and move the support structure 200 toward the distal end of the tube body 100, so that at least part of the support structure 200 is located outside the distal end of the tube body 100, and the support structure 200 located outside the distal end of the tube body 100 is plugged into the introduction end 600 to fix the position of the introduction end 600 and the tube body 100. The insertion part 700 of the endoscope is inserted into the tube body 100, and then the tube body 100 is inserted into the human body cavity as a whole, and the visual field information of the distal end of the tube body 100 is obtained by the cooperation of the insertion part 700 and the introduction end 600, which is convenient for the operator to perform the insertion operation.

[0035] Compared with the prior art, the guide sheath provided in the embodiment of the present application changes the insertion operation of the insertion part 700. The insertion part 700 is inserted synchronously with the tube body 100 of the guide sheath, which greatly saves the insertion steps, simplifies the insertion operation, and improves the insertion efficiency. In addition, the tube body 100 has visual field information during the insertion process, and does not need to be inserted blindly. The insertion direction can be accurately determined in the narrow or curved parts of the human body cavity, thereby avoiding damage to the inner wall of the human body cavity due to the wrong insertion direction and reducing the surgical risk.

[0036] The guide sheath provided in the embodiment of the present application can be used in conjunction with any insertion portion 700 of suitable size, and the introduction tip 600 is fixed to the tube body 100 of the guide sheath without changing the structure of the insertion portion 700.

[0037] The introduction end 600 plays a guiding role and is generally made of a material with a certain elasticity. On the one hand, it can be more stably connected to the support structure 200. On the other hand, it has a certain buffer when contacting the inner wall of the human body cavity and is not easy to cause damage to the inner wall of the cavity.

[0038] When part of the support structure 200 extends out of the distal end of the tube body 100, part of the support structure 200 is still in contact with the tube body 100 and supported by the tube body 100, and the other part is inserted into the introduction end 600 to stabilize the position of the introduction end 600. When the support structure 200 is fully extended out of the distal end of the tube body 100, the connection between the support structure 200 and the tube body 100 is not released, and there is still a connection between the two, and the relative position of the support structure 200 and the tube body 100 is still stable, so that the support structure 200 can fix the relative position of the introduction end 600 and the tube body 100.

[0039] In some preferred embodiments, when the support structure 200 is plugged into the introduction end 600, the proximal end face of the introduction end 600 and the distal end face of the tube body 100 are arranged to fit together to avoid a gap between the tube body 100 and the introduction end 600, thereby avoiding discomfort caused by the gap to the human body during the insertion process.

[0040] The driving mechanism 300 mainly plays a driving role, driving the support structure 200 to move relative to the tube body 100. In the embodiment provided in the present application, the driving mechanism 300 drives the support structure 200 to move into the tube body 100, which actually controls the support structure 200 to move from the outside of the distal end of the tube body 100 toward the inside of the tube body 100, so that the support structure 200 is completely moved into the inside of the tube body 100, thereby releasing the connection between the support structure 200 and the introduction end 600. The driving mechanism 300 can be a traction rope, which controls the support structure 200 to move into the tube body 100 by pulling, or it can be other driving mechanisms 300, such as a spring with a limiting structure. When at least part of the support structure 200 is located outside the distal end of the tube body 100, the spring is stretched, and the limiting structure limits the retraction of the spring. When it is necessary to start the driving mechanism 300, the limiting structure is destroyed, and the spring retracts, thereby driving the support structure 200 to move toward the inside of the tube body 100.

[0041] In some preferred embodiments, the movement direction between the support structure 200 and the tube body 100 is parallel to the axial direction of the tube body 100, which is convenient for the driving mechanism 300 to drive the support structure 200 to move. At the same time, it is also convenient to judge the length of the support structure 200 outside the far end of the tube body 100 according to the moving distance of the support structure 200.

[0042] The support structure 200 can be installed on the outer circumference of the tube body 100, or on the inner circumference of the tube body 100. Here, inside and outside represent the inside-outside relationship of the tube body 100 in the radial direction. It should be noted that the driving mechanism 300 drives the support structure 200 to move into the tube body 100. Here, inside represents the inside-outside relationship of the tube body 100 in the axial direction. If at least part of the support structure 200 is outside the distal end or the proximal end of the tube body 100, it means that at least part of the support structure 200 is outside the tube body 100. If the support structure 200 is not exposed outside the distal end or the proximal end of the tube body 100, it means that the support structure 200 is inside the tube body 100.

[0043] In some preferred embodiments, the distal end surface of the tube body 100 is provided with a mounting groove 110, and the support structure 200 is movably disposed in the mounting groove 110. Figure 3 , Figure 4 , Figures 7 to 9 As shown. The mounting groove 110 provides an installation space for the support structure 200, and the support structure 200 moves in the mounting groove 110. Compared with the support structure 200 being arranged on the outer circumference or inner circumference of the tube body 100, the support structure 200 is located in the mounting groove 110. On the one hand, it will not affect the flatness of the outer circumference of the tube body 100. The outer circumference of the tube body 100 is in direct contact with the inner wall of the cavity. The flatter the outer circumference of the tube body 100, the less discomfort the human body feels during the insertion process. On the other hand, it will not affect the insertion or removal of the insertion part 700, the introduction end 600 or other components in the internal channel of the tube body 100.

[0044] The support structure 200 is installed in the installation groove 110 , and the side walls of the installation groove 110 can limit the support structure 200 , so that the support structure 200 can move in a preset direction.

[0045] In some preferred embodiments of the present application, the guide sheath further includes a reset structure 400, which is connected between the support structure 200 and the tube body 100. Figures 2 to 5 , Figures 8 to 10As shown. The reset structure 400 is used to drive the support structure 200 to move toward the proximal end of the tube body 100 so that the support structure 200 extends to the distal end of the tube body 100. The reset structure 400 mainly provides a reset driving force for the support structure 200. After the driving mechanism 300 drives the support structure 200 to move into the tube body 100, the reset structure 400 can drive the support structure 200 to extend out of the distal end of the tube body 100 again. The reset structure 400 improves the flexibility of use of the support structure 200, and the position of the support structure 200 can be adjusted according to actual use conditions. In addition, the reset structure 400 can also increase the connection stability between the support structure 200 and the tube body 100. In some specific embodiments, the reset structure 400 is generally selected as a spring.

[0046] In some embodiments of the present application, the driving mechanism 300 is a traction rope, Figures 2 to 6 , Figure 8 and Fig. 9 As shown, the movement of the support structure 200 is controlled by pulling the traction rope.

[0047] A positioning member 310 is fixed to the proximal end of the traction rope, and the positioning member 310 is installed at the sheath handle 800 of the guide sheath, and the positioning member 310 can be fixed to the first position or the second position of the sheath handle 800. When the positioning member 310 is fixed to the first position, at least part of the support structure 200 can extend out of the distal end of the tubular body 100. Since the positioning member 310 fixed to the proximal end of the traction rope is fixedly connected to the sheath handle 800, the support structure 200 can no longer move toward the distal end of the tubular body 100, and the length of the support structure 200 exposed outside the tubular body 100 is determined, thereby improving the connection stability between the support structure 200 and the introduction end 600. When the positioning member 310 is fixed to the second position, the support structure 200 is located inside the tubular body 100. The position of the positioning member 310 is fixed, and the traction rope cannot move, thereby preventing the support structure 200 from accidentally sliding out of the tubular body 100.

[0048] The positioning member 310 is disposed at the proximal end of the traction rope, so that the operator can directly control the position of the traction rope, thereby controlling the position of the support structure 200. The positioning member 310 is moved from the first position to the second position, that is, the traction rope is pulled toward the proximal end to move the support structure 200 into the tube body 100. The positioning member 310 is moved from the second position to the first position to reserve a margin of movement for the support structure 200, so that the support structure 200 can extend out of the distal end of the tube body 100.

[0049] In some embodiments of the present application, the positioning member 310 is plugged into and matched with the sheath handle 800, and a groove can be directly set at the sheath handle 800, and grooves are set at both the first position and the second position. When the positioning member 310 is plugged into the groove at the first position, the positioning member 310 is fixed at the first position, and when the positioning member 310 is plugged into the groove at the second position, the positioning member 310 is fixed at the second position.

[0050] In other embodiments of the present application, the positioning member 310 is slidably matched with the sheath handle 800, and the positioning member 310 can slide between the first position and the second position. Fig.12 As shown, the sheath handle 800 is provided with a slide groove 810, the positioning member 310 is slidably arranged in the slide groove 810, and a damping structure 820 is arranged between the positioning member 310 and the slide groove 810 to increase the resistance between the positioning member 310 and the slide groove 810, thereby fixing the positioning member 310 to the sheath handle 800. The damping structure 820 can be directly set at the first position and the second position, and while fixing the position of the positioning member 310, it does not affect the normal sliding of the positioning member 310 between the two positions.

[0051] In some embodiments, the damping structure 820 is fixed to the inner wall of the slide groove 810, and the damping structure 820 can be directly set to a block shape. There are at least two damping structures 820, and the damping structures 820 are fixed at the first position and the second position of the slide groove 810. In the case that at least part of the support structure 200 extends out of the distal end of the tube body 100, at least one damping structure 820 is clamped between the positioning member 310 and the inner wall of the slide groove 810, and the positioning member 310 is fixed at the first position; when the support structure 200 moves into the tube body 100, at least one other damping structure 820 is clamped between the positioning member 310 and the slide groove 810, and the positioning member 310 is fixed at the second position.

[0052] In the case where a reset structure 400 is connected between the support structure 200 and the tube body 100, when the support structure 200 is inside the tube body 100, the reset structure 400 provides a reset force for the support structure 200, driving the support structure 200 to move outside the tube body 100. However, since the support structure 200 is also connected to a traction rope, and the relative position of the traction rope is stabilized by the positioning member 310 and the damping structure 820, the support structure 200 can maintain a stable position under the action of the reset structure 400 and the traction rope, and be stably located inside the tube body 100.

[0053] In some embodiments of the present application, a plurality of support structures 200 are provided, and the plurality of support structures 200 are distributed along the circumference of the tube body 100. The support structure 200 is plugged into the introduction end 600, and the support structures 200 distributed along the circumference of the tube body 100 are also distributed along the circumference of the introduction end 600 in the introduction end 600, so that the introduction end 600 is subjected to as balanced force as possible in the circumferential direction, thereby improving the connection stability between the support structure 200 and the introduction end 600.

[0054] In some other embodiments of the present application, the support structure 200 is directly provided with an annular structure. Figure 7 As shown. Corresponding to the support structure 200, the mounting groove 110 is also an annular groove. The overall structural strength of the annular structure is higher, and the support structure 200 is an integral structure, and it is more convenient to control its position using the drive mechanism 300. Corresponding to the support structure 200, the reset structure 400 is directly installed in the annular mounting groove 110 and fixed to the support structure 200.

[0055] During the process of the support structure 200 being inserted into the introduction end 600, the support structure 200 gradually expands the introduction end 600, so that the introduction end 600 can be closely attached to the support structure 200. The outer peripheral surface of the support structure 200 is used to fit with the inner wall of the introduction end 600, and part of the outer peripheral surface of the support structure 200 is set as the guide surface 210, which is located at the far end of the support structure 200, Figure 5 and Figure 6 As shown, the radial distance between the guide surface 210 and the axis of the tube body 100 gradually decreases from the proximal end of the support structure 200 to the distal end of the support structure 200. At the distal end of the support structure 200, the radial dimension corresponding to the guide surface 210 is the smallest, making it easier to plug into the introduction end 600, and the radial dimension corresponding to the guide surface 210 gradually increases, making it easier for the support structure 200 to be plugged into the introduction end 600.

[0056] In some preferred embodiments of the present application, a stop structure 500 is also installed on the groove wall of the installation groove 110, referring to Figure 3 , Figure 4 , Figure 8 and Fig. 9As shown, the stop structure 500 is located on the moving path of the support structure 200 from the distal end of the tube body 100 to the inside of the tube body 100, increasing the resistance of the support structure 200 to move into the tube body 100. In addition, when the support structure 200 is plugged into the introduction end 600 located at the distal end of the tube body 100, the stop structure 500 is located at the proximal end of the support structure 200. When the support structure 200 has a tendency to move toward the proximal end of the tube body 100, that is, to move into the tube body 100, the stop structure 500 can prevent the support structure 200 from moving, thereby preventing the support structure 200 from accidentally moving from the outside of the distal end of the tube body 100 to the inside of the tube body 100. The stop structure 500 can be deformed under the abutment of the support structure 200 to avoid the support structure 200.

[0057] The stop structure 500 can cooperate with the driving mechanism 300 to jointly stabilize the position of the support structure 200 when the positioning member 310 is fixed at the first position of the sheath handle 800 .

[0058] When an external force drives the support structure 200 to move, the support structure 200 abuts against the stop structure 500, causing the stop structure 500 to deform, thereby reserving space for the support structure 200 to move, avoiding the support structure 200, and allowing the support structure 200 to move smoothly from the far end of the tube body 100 to the inside of the tube body 100.

[0059] In some preferred embodiments, the stopper structure 500 is fixed to the groove wall of the installation groove 110 close to the axis of the tube body 100. When the stopper structure 500 abuts against the support structure 200 and the stopper structure 500 is deformed, the groove wall of the installation groove 110 connected to the stopper structure 500 will also be deformed. The stopper structure 500 is arranged close to the inner cavity of the tube body 100, and the tube body 100 bulges toward the inside thereof, which does not affect the overall external dimensions of the tube body 100. In some other preferred embodiments, the surface of the stopper structure 500 in contact with the support structure 200 is a stopper surface, and the stopper surface is a smooth curved surface structure, which reduces the resistance of the support structure 200 when the support structure 200 contacts the stopper structure 500, and the support structure 200 is more likely to slide over the stopper structure 500, causing the stopper structure 500 to deform.

[0060] The embodiment of the present application also provides a guide sheath assembly, including an introduction terminal 600 and a guide sheath provided by any of the above embodiments. The introduction terminal 600 is located at the distal end of the tube body 100, and can cooperate with the support structure 200 and be sleeved outside the support structure 200. The area of ​​the introduction terminal 600 corresponding to the light source and the camera module of the insertion part 700 penetrating the tube body 100 is transparent, which is convenient for the transmission of light and the acquisition of image information in the body cavity. When at least part of the support structure 200 extends out of the distal end of the tube body 100, the support structure 200 can be plugged into the introduction terminal 600 located at the distal end of the tube body 100 to fix the relative position of the introduction terminal 600 and the tube body 100, refer to Figure 1 shown.

[0061] The present application also provides an implantation device, referring to Fig.11 As shown, it includes an endoscope and a guide sheath assembly provided by any of the above embodiments, and the insertion portion 700 of the endoscope is inserted into the tube body 100. During the insertion process, the insertion device is inserted into the body cavity of the human body as a whole, and the insertion portion 700, the introduction end 600 and the tube body 100 cooperate to reach the preset cavity position.

[0062] After the tube body 100 and the introduction end 600 are placed in the preset cavity position in the human body with the insertion part 700, the introduction end 600 needs to be removed to facilitate the subsequent treatment of the lesion position. In the specific implementation, the support structure 200 is first separated from the introduction end 600 by controlling the position of the support structure 200, and then the introduction end 600 is removed through the inner cavity of the tube body 100. In some embodiments, the corresponding instrument can be directly passed through the instrument channel of the insertion part 700 to clamp and fix the introduction end 600, and then the insertion part 700, the instrument and the introduction end 600 are withdrawn from the tube body 100 together. In other embodiments, the proximal opening of the introduction end 600 can be set to have an inner diameter less than or equal to the outer diameter of the insertion part 700. Under such a setting, the introduction end 600 can be attached to the outside of the insertion part 700 during the process of detaching from the support structure 200, and the introduction end 600 is fixedly connected to the insertion part 700. The operator can remove the introduction end 600 by removing the insertion part 700. After the introduction tip 600 is taken out, the insertion portion 700 is inserted into the tube body 100 to reach the preset cavity position again.

[0063] When the support structure 200 is connected to the introduction end 600, the inner diameter of the introduction end 600 is expanded. After the support structure 200 is separated from the introduction end 600, the introduction end 600 gradually recovers to its size before expansion due to the lack of support from the support structure 200. The distal end of the insertion part 700 is pre-set inside the introduction end 600. When the introduction end 600 gradually recovers its size, it can be attached to the outside of the insertion part 700 and connected to the insertion part 700.

[0064] Further preferably, the insertion part 700 is fixedly connected to the sheath handle 800 of the guide sheath. During the insertion process, the relative position of the insertion part 700 and the tube body 100 needs to be kept stable, and the field of view obtained by the camera module can be kept stable, which is more convenient for the operator to insert the tube body 100. In addition, the distal end of the insertion part 700 is placed in the range corresponding to the introduction terminal 600 in advance, and the insertion part 700 is fixed to the sheath handle 800 to stabilize the position of the insertion part 700, so that after the introduction terminal 600 is separated from the support structure 200, it can be directly attached to the outside of the insertion part 700 to complete the fixation of the introduction terminal 600 and the insertion part 700.

[0065] The above description is only 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 in the protection scope of the present invention.

Claims

1. A guide sheath tube, used in an endoscope, characterized in that: The guide sheath comprises a tube body (100), a support structure (200) and a driving mechanism (300); The support structure (200) is movably connected to the tube body (100), and the drive mechanism (300) is connected to the support structure (200); At least a portion of the support structure (200) is capable of extending outside the distal end of the tube body (100) so as to be plugged into an introduction end head (600) located at the distal end of the tube body (100) to expand the inner diameter of the introduction end head (600); the area of ​​the introduction end head (600) corresponding to the light source and the camera module of the insertion portion (700) penetrating the tube body (100) is transparent; The driving mechanism (300) is used to drive the support structure (200) to move into the tube body (100), so that the support structure (200) is separated from the introduction end (600); The distal end surface of the tube body (100) is provided with a mounting groove (110), and the support structure (200) is movably disposed in the mounting groove (110); A stop structure (500) is installed on the groove wall of the installation groove (110); the stop structure (500) is located on the movement path of the support structure (200) from the distal end of the tube body (100) to the inside of the tube body (100); and when the support structure (200) is plugged into the introduction end (600) located at the distal end of the tube body (100), the stop structure (500) is located at the proximal end of the support structure (200); the stop structure (500) can be deformed under the abutment of the support structure (200) to avoid the support structure (200).

2. A guide sheath according to claim 1, characterized in that: The guide sheath further comprises a resetting structure (400), wherein the resetting structure (400) is connected between the support structure (200) and the tube body (100), and the resetting structure (400) is used to drive the support structure (200) to move in a direction away from the proximal end of the tube body (100), so that the support structure (200) extends to the distal end of the tube body (100); And / or, the driving mechanism (300) is a traction rope, a positioning member (310) is fixed to the proximal end of the traction rope, the positioning member (310) is installed on the sheath handle (800) of the guide sheath, and the positioning member (310) can be fixed to the first position or the second position of the sheath handle (800), when the positioning member (310) is fixed to the first position, at least part of the support structure (200) can extend out of the distal end of the tube body (100), and when the positioning member (310) is fixed to the second position, the support structure (200) is located inside the tube body (100).

3. A guide sheath according to claim 1, characterized in that: There are a plurality of the support structures (200), and the plurality of the support structures (200) are distributed along the circumference of the tube body (100); Alternatively, the support structure (200) is an annular structure, and the support structure (200) is coaxially arranged with the tube body (100).

4. A guide sheath according to claim 1, characterized in that: The outer peripheral surface of the support structure (200) is used to fit with the inner wall of the introduction end head (600); part of the outer peripheral surface of the support structure (200) is a guide surface (210); the guide surface (210) is located at the distal end of the support structure (200); and along the direction from the proximal end of the support structure (200) to the distal end of the support structure (200), the radial distance between the guide surface (210) and the axis of the tube body (100) gradually decreases.

5. The guide sheath according to claim 1, characterized in that: The stop structure (500) is fixed to a groove wall of the installation groove (110) close to the axis of the tube body (100); And / or, the surface of the stop structure (500) in contact with the support structure (200) is a stop surface, and the stop surface is a smooth curved surface structure.

6. A guide sheath assembly, characterized in that: It comprises an introduction terminal (600) and a guide sheath as described in any one of claims 1 to 5, wherein the area of ​​the introduction terminal (600) corresponding to the light source and the camera module of the insertion portion (700) penetrating the tube body (100) is transparent, and the support structure (200) can be inserted into the introduction terminal (600) when at least part of the support structure (200) extends out of the distal end of the tube body (100).

7. An implantation device, characterized in that: It comprises an endoscope and the guide sheath assembly as claimed in claim 6, wherein the insertion portion (700) of the endoscope is inserted into the tube body (100), and the inner diameter of the proximal opening of the introduction terminal (600) is less than or equal to the outer diameter of the insertion portion (700), so that the introduction terminal (600) can be attached to the outside of the insertion portion (700) during the process of being detached from the support structure (200).

8. The implantation device according to claim 7, characterized in that: The insertion portion (700) is fixedly connected to the sheath handle (800) of the guide sheath.

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