Pipe for guide sheath, guide sheath, and guide device

Abstract

Provided are a pipe for a guide sheath, a guide sheath, and a guide device. The pipe for the guide sheath is provided with a channel (10). The channel (10) extends in an axial direction of the pipe for the guide sheath and is configured for receiving an insertion part of an endoscope. The pipe for the guide sheath comprises a body section (20) and a bending section (30). The proximal end of the bending section (30) is connected to the distal end of the body section (20). The bending section (30) comprises a plurality of pipe segment units (31) distributed in the axial direction of the pipe for the guide sheath, and each pipe segment unit (31) comprises a first riveting structure (32) and a second riveting structure (33). Each pipe segment unit (31) is rotatably connected to the pipe segment units (31) at two ends thereof separately by means of the first riveting structure (32) and the second riveting structure (33). The rotation axes of the first riveting structure (32) and the second riveting structure (33) intersect. The bending section (30) allows bending in all directions, so as to make the adjustment of the orientation of the guide sheath easier, accurately direct the guide sheath and the insertion part of the endoscope to a target operation area, and assist the timely suction of crushed calculi by means of the insertion part of the endoscope.

Description

A guide sheath tube, a guide sheath and a guide device Technical Field

[0001] The present application relates to the field of medical technology, and in particular to a tube for a guide sheath, a guide sheath, and a guide device. Background Art

[0002] Guide sheaths are used in urological surgery. Before clinical urological surgery, a guide sheath must be inserted into the ureter to establish a surgical channel. During the operation, an endoscope, laser fiber, stone removal instruments or operating cables are introduced through the surgical channel. Some blood clots, small stones, and purulent flocs are also discharged from the guide sheath.

[0003] In existing technology, the insertion portion of an endoscope (such as a nephroscope) is inserted into a guide sheath. The surgeon typically uses the bending motion of the insertion portion to drive the guide sheath's bending to adjust the orientation of the guide sheath, thereby adjusting the surgical field. However, in practice, this often makes it difficult to adjust the guide sheath to the target surgical area, and can even cause damage to components such as the traction cord and snake in the insertion portion of the endoscope. Utility Model Content

[0004] The purpose of this application is to provide a guide sheath tube, a guide sheath, and a guide device to solve the above-mentioned technical problems existing in the prior art, mainly including the following contents:

[0005] In a first aspect, the present application provides a tubular member for an introducer sheath, comprising:

[0006] The guide sheath tube has a pipeline, the pipeline is extended along the axial direction of the guide sheath tube, and the pipeline is used to insert the insertion part of the endoscope;

[0007] The guide sheath tube includes a main body section and a curved section, wherein the proximal end of the curved section is connected to the distal end of the main body section; wherein the curved section includes a plurality of tube segment units distributed along the axial direction of the guide sheath tube, and the tube segment units include a first riveted structure and a second riveted structure;

[0008] The pipe segment unit is rotatably connected to the pipe segment units at both ends thereof through the first riveted structure and the second riveted structure respectively; the rotation axes of the first riveted structure and the second riveted structure intersect.

[0009] To further better implement the present application, the following configuration is particularly adopted: the first riveted structure and the second riveted structure both include a first riveted portion and a second riveted portion, wherein:

[0010] The first riveted portion and the second riveted portion are distributed along the same radial direction of the guide sheath tube; or,

[0011] The first rivet portion and the second rivet portion are offset and distributed along the radial direction of the guide sheath tube.

[0012] In order to further better realize the present application, the following setting structure is particularly adopted: the guide sheath tube is an integrated cutting structure.

[0013] To further better implement the present application, the following configuration is particularly adopted: the first riveted structure and the second riveted structure are respectively rotatably connected to the proximal tube segment unit and the distal tube segment unit through the cooperation of the rotating ear and the rotating groove;

[0014] The rotating ears and the rotating grooves are respectively provided on two adjacent pipe segment units, and the rotating ears are rotatably provided on the rotating grooves;

[0015] When the two adjacent pipe segment units connected by the first riveting structure or the second riveting structure are rotated relative to each other to the extreme position, the two adjacent pipe segment units are limitedly abutted, and an avoidance gap is provided between the rotating ear and the bottom wall of the rotating groove.

[0016] To further better implement the present application, the following configuration is particularly adopted: in two adjacent pipe segment units connected by the first riveting structure or the second riveting structure, a limiting protrusion is provided on the end surface of one of the pipe segment units facing the other pipe segment unit;

[0017] When two adjacent pipe segment units connected by the first riveting structure or the second riveting structure are relatively rotated to the limit position, the limiting protrusion is in limiting abutment with the end face of the other pipe segment unit.

[0018] To further better implement the present application, the following configuration is particularly adopted: a plurality of cutting slits are distributed on the side wall of the main body segment along the axial direction of the guide sheath tube, wherein:

[0019] The plurality of cutting slits include a first cutting slit and a second cutting slit, wherein the first cutting slit and the second cutting slit are staggered along the circumference of the main body segment; and / or,

[0020] At least a portion of the cutting slots is inclined at a first angle relative to the axial direction of the main body segment.

[0021] In order to further better implement the present application, the following setting structure is particularly adopted: the first angle is not less than 30°.

[0022] A second aspect of the present application provides a guide sheath, comprising the above-mentioned tube for the guide sheath.

[0023] In order to further better realize the present application, the following configuration structure is particularly adopted: the guide sheath further includes an outer covering layer, and the outer covering layer is sleeved on the outer wall of the guide sheath tube.

[0024] A third aspect of the present application provides a guiding device, comprising a dilator and the above-mentioned guiding sheath, wherein the dilator can pass through the guiding sheath.

[0025] Compared with the prior art, this application has at least the following technical effects:

[0026] In the present application, a bending section is provided on the guide sheath tube, and the bending section includes a plurality of tube segment units distributed along the axial direction of the guide sheath tube, and the tube segment unit includes a first riveted structure and a second riveted structure; the rotation axes of the first riveted structure and the second riveted structure intersect, so that the bending section can achieve universal bending, thereby facilitating the adjustment of the orientation of the guide sheath, so that the guide sheath and the insertion part of the endoscope can be accurately oriented toward the target surgical area, assisting the insertion part of the endoscope to absorb the broken stones in time, and avoiding damage to the front end of the insertion part of the endoscope caused by the stones, shortening the operation time of the operation, and improving the success rate of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments of the present application or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0028] FIG1 is an overall schematic diagram of a tube for an introducer sheath in the present application;

[0029] Figure 2 is an enlarged view of portion A in Figure 1;

[0030] FIG3 is a schematic diagram showing the connection between the curved section and the main section in this application.

[0031] Figure 4 is a schematic diagram of the pipe segment unit in this application:

[0032] FIG5 is a schematic diagram showing the distribution of the first riveted portion and the second riveted portion on the pipe segment unit in this application:

[0033] FIG6 is a schematic diagram showing the distribution of the third riveted portion and the fourth riveted portion on the pipe segment unit in the present application;

[0034] FIG7 is a schematic diagram of the connection between the pipe segment units through the rotating ears and the rotating grooves in the present application;

[0035] FIG8 is a structural diagram of the first and second cutting seams of the main body section in the present application;

[0036] FIG9 is a second structural diagram of the first cutting seam and the second cutting seam of the main body section in the present application;

[0037] FIG. 10 is a schematic diagram of the bending of the curved section of the guide sheath tube in the present application along different directions.

[0038] 10-Pipeline;

[0039] 20-main body; 21-first cutting seam; 22-second cutting seam;

[0040] 30-bend section; 31-tube unit; 32-first riveted structure; 321-first riveted portion; 322-second riveted portion; 33-second riveted structure; 331-third riveted portion; 332-fourth riveted portion;

[0041] 41 - Rotation ear; 42 - Rotation slot; 43 - Avoidance gap; 444 - Limiting protrusion. DETAILED DESCRIPTION

[0042] The following description provides many different embodiments or examples for implementing different features of the present application. The components and arrangements described in the following specific examples are only used to simplify the present application and are only examples, not to limit the present application.

[0043] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application for which protection is claimed, but merely represents selected embodiments of the present application.

[0044] In this application, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "fixed," and the like should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal connectivity between two elements or an interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood based on the specific circumstances. In addition, the terms "first," "second," "third," and the like are used only to distinguish descriptions and are not to be understood as indicating or implying relative importance.

[0045] In addition, in the present application, "proximal" and "distal" refer to the far and near positions of the guide sheath tube, guide sheath and guide device relative to the operator in the use environment, so as to facilitate the description of the positional relationship between the components and facilitate understanding; for the same component, "proximal" and "distal" are the relative positional relationship of the component, not absolute; therefore, it should be understood from the perspective of realizing the principles of this application, and cannot deviate from the essence of this application.

[0046] Endoscopes (such as nephroscopes) are one of the important medical devices in modern surgical operations. For example, in transurethral laser kidney stone surgery, the usual working method is: 1. First, the endoscope is passed through the urethra into the bladder and ureter; 2. Then, the guide wire is passed through the working channel of the endoscope to the renal pelvis; 3. The endoscope is withdrawn, leaving only the guide wire in the urinary tract; 4. The ureteral guide sheath and the sheath core inside the guide sheath are then inserted through the guide wire; 5. The sheath core inside the ureteral guide sheath is pulled out; 6. The insertion part of the endoscope is then inserted through the ureteral guide sheath, and the inserted instrument is passed through the instrument channel inside the insertion part into the body cavity to perform functions such as fiber optic lithotripsy, cooling and flushing, and stone extraction.

[0047] The inventors discovered in their research that the insertion portion of an endoscope is inserted into a guide sheath. The surgeon typically uses the bending motion of the insertion portion to drive the guide sheath's bending to adjust the orientation of the guide sheath, thereby adjusting the surgical field. However, in practice, this often results in difficulty adjusting the guide sheath to the target surgical field, and can even cause damage to components such as the traction cord and snake in the insertion portion of the endoscope.

[0048] In view of this, the present application provides a guide sheath tube, a guide sheath, and a guide device to solve the above-mentioned technical problems existing in the prior art, which mainly include the following contents:

[0049] In a first aspect, the present application provides a tubular member for an introducer sheath, as shown in FIG1 to FIG10 , comprising:

[0050] The guide sheath tubing includes a conduit 10 extending axially along the guide sheath tubing and configured to receive the insertion portion of an endoscope. Exemplarily, the guide sheath tubing is tubular with a hollow center portion. The space formed within the hollow structure serves as conduit 10. The insertion portion of the endoscope can be inserted into the guide sheath tubing along conduit 10. With the guide sheath positioned within the body, the insertion portion of the endoscope can smoothly reach a lesion within the patient's body, such as a kidney stone, along conduit 10.

[0051] The guide sheath tubing includes a main section 20 and a curved section 30, with the proximal end of the curved section 30 connected to the distal end of the main section 20. In this application, the guide sheath tubing is divided into two parts: the main section 20 and the curved section 30. The distal end of the main section 20 is rotatably connected to the proximal end of the curved section 30, so that the curved section 30 can drive the main section 20 to bend when bending. It should be noted that the curved section 30 is intended to have relatively stronger bending performance. The main section 20 also has a certain degree of bending performance, but the bending performance of the main section 20 is lower than that of the curved section 30.

[0052] Among them, the bending section 30 includes a plurality of tube segment units 31 distributed along the axial direction of the guide sheath tube. The number of the tube segment units 31 can be three, four, five, etc., and there is no limitation here, as long as the insertion part of the endoscope can drive the bending section 30 to bend. The tube segment unit 31 includes a first riveted structure 32 and a second riveted structure 33. Optionally, the tube segment unit 31 may also include a third riveted structure, a fourth riveted structure, etc. Exemplarily, the tube segment unit 31 is provided with a first riveted structure 32 and a second riveted structure 33 at both ends along the axial direction. Specifically, one end of the tube segment unit 31 is provided with a first riveted structure 32, and the other end is provided with a second riveted structure 33. The tube segment unit 31 is rotatably connected to the tube segment units at both ends thereof through the first riveted structure 32 and the second riveted structure 33. Exemplarily, the tube segment unit 31 can be rotatably connected to the tube segment unit at its front end through the first riveting structure 32, and rotatably connected to the tube segment unit at its rear end through the second riveting structure 33; alternatively, the tube segment unit 31 can be rotatably connected to the tube segment unit at its front end through the second riveting structure 33, and rotatably connected to the tube segment unit at its rear end through the first riveting structure 32. The rotation axes of the first riveting structure 32 and the second riveting structure 33 intersect. Exemplarily, the rotation axis of the first riveting structure 32 is L1, and the rotation axis of the second riveting structure 33 is L2. If the rotation axis L1 of the first riveting structure 32 is horizontal and the rotation axis L2 of the second riveting structure 33 is vertical, the rotation axis L1 and the rotation axis L2 intersect, thereby enabling the guide sheath tube to achieve bending movements in different directions between different pairs of tube segment units 31. In some embodiments, the angle between the rotation axis L1 and the rotation axis L2 after the intersection is greater than 0°, such as the angle is 30°, 45°, 60°, 90°, etc., which is not limited here. For example, multiple tube segment units 31 are connected by rotating in sequence through the first riveted structure 32 and the second riveted structure 33 to form a bending segment 30 that can bend in multiple directions. For example, the bending segment 30 in the present application can be rotated and bent in at least four directions, such as the bending segment 30 can be rotated and bent in at least two directions along the rotation axis L1, and can also be rotated and bent in two directions along the rotation axis L2. The weight distribution of the bending amplitude of the tube segment unit 31 in different bending directions in the present application can be achieved by driving the insertion part of the endoscope, pressing against the wall of the human cavity, etc. to achieve the final universal bending.

[0053] Therefore, in the present application, a bending section 30 is provided on the guide sheath tube, and the bending section 30 includes a plurality of tube segment units 31 distributed along the axial direction of the guide sheath tube, and the tube segment unit 31 includes a first riveted structure 32 and a second riveted structure 33; the rotation axes of the first riveted structure 32 and the second riveted structure 33 intersect, so that the bending section 30 can achieve universal bending, thereby facilitating the adjustment of the orientation of the guide sheath, so that the guide sheath and the insertion part of the endoscope can be accurately directed toward the target surgical area, assisting the insertion part of the endoscope to absorb the broken stones in time, avoiding the broken stones blocking the optical devices at the front end of the insertion part of the endoscope, which is not conducive to the medical staff's clear operating field of view, and also avoiding the damage caused by the stones to the optical devices at the front end of the insertion part of the endoscope, shortening the operation time of the operation and improving the success rate of the operation.

[0054] According to some optional embodiments, the first riveted structure 32 and the second riveted structure 33 both include a first riveted portion 321 and a second riveted portion 322, wherein the structures of the first riveted portion 321 and the second riveted portion 322 may be the same. The second riveted structure 33 includes a third riveted portion 331 and a fourth riveted portion 332, and the third riveted portion 331 and the fourth riveted portion 332 have the same structure. The structures of the first riveted structure 32 and the second riveted structure 33 may be the same, or they may be different, without limitation. Wherein:

[0055] The first riveted portion 321 and the second riveted portion 322 are distributed along the same radial direction of the guide sheath tube, and the first riveted portion 321 and the second riveted portion 322 are arranged at intervals on the circumferential side wall of the tube segment unit 31; the first riveted portion 321 and the second riveted portion 322 are symmetrically distributed along the radial axis L3 of the guide sheath tube, so that the first riveted portion 321 and the second riveted portion 322 rotate in the same direction, and the bending section 30 rotates and bends smoothly along the preset direction.

[0056] In some optional embodiments, the first riveted portion 321 and the second riveted portion 322 may also be distributed in a radially offset manner along the guide sheath tube. For example, the first riveted portion 321 and the second riveted portion 322 may be arranged in a direction parallel to the radial axis L3, and similarly, the bending section 30 may be bent in a predetermined direction.

[0057] According to some optional embodiments, the guide sheath tube is an integrally cut structure.

[0058] In the above embodiment, the curved section 30 and the main section 20 of the guide sheath tubing are both integrally cut structures. The guide sheath tubing is preferably made of stainless steel, such as 304 stainless steel or 316 stainless steel. Exemplarily, the guide sheath tubing is manufactured using an integrally cut structure. This approach can meet the requirements for achieving universal bending of the guide sheath tubing and ensuring the rigidity of the guide sheath tubing when bending or advancing.

[0059] According to some optional embodiments, the first riveted structure 32 and the second riveted structure 33 of the pipe segment unit 31 are rotatably connected to the pipe segment units at their ends through the cooperation of a rotating ear 41 and a rotating groove 42. For example, the first riveted structure 32 in the pipe segment unit 31 is rotatably connected to the rotating groove 42 on the pipe segment unit at its front end via the rotating ear 41, and the second riveted structure 33 is rotatably connected to the rotating ear 41 on the pipe segment unit at its rear end via the rotating groove 42. The rotating ear 41 and the rotating groove 42 are provided on the pipe segment unit 31, and this arrangement can increase the structural strength of the pipe segment unit 31.

[0060] In this application, the annular clip 41 and the rotating groove 42 are used to realize the rotation function between the two adjacent tube segment units 31 and partially bear the axial force; on the other hand, it ensures that the connection between the two adjacent tube segment units 31 is firm and will not fall off during the rotation of the guide sheath tube.

[0061] The rotating ear 41 and the rotating groove 42 are respectively provided on two adjacent pipe segment units 31, and the rotating ear 41 is rotatably provided in the rotating groove 42. In other words, one of the two adjacent pipe segment units 31 is provided with the rotating ear 41, and the other of the two adjacent pipe segment units 31 is provided with the rotating groove 42, and the rotating ear 41 is rotatably provided in the rotating groove 42.

[0062] When two adjacent pipe segment units 31 connected by the first riveted structure 32 or the second riveted structure 33 rotate relative to each other to their limit positions, the two adjacent pipe segment units 31 are in contact with each other, and a clearance gap 43 is defined between the rotating ear 41 and the bottom wall of the rotating groove 42. Specifically, the bottom wall of the rotating groove 42 refers to the inner wall of the rotating groove 42 opposite to the groove opening thereof, with the groove opening and the bottom wall of the rotating groove 42 spaced apart in the axial direction of the pipe segment unit 31. When two adjacent pipe segment units 31 rotate relative to each other to their limit positions, a clearance gap 43 is defined between the rotating ear 41 and the bottom wall of the rotating groove 42. Therefore, if the two adjacent pipe segment units 31 are further rotated relative to each other, the clearance gap 43 provides rotational space for the rotating ear 41, thereby preventing the rotating ear 41 from squeezing the bottom wall of the rotating groove 42. This avoids the rotating ear 41 from squeezing the bottom wall of the rotating groove 42, thereby preventing the rotating ear 41 from being subjected to a greater squeezing force, thereby reducing the risk of damage to the rotating ear 41.

[0063] Optionally, in the present application, one of the front and rear end surfaces of each pipe segment unit 31 is provided with a rotation ear 41, and the other is provided with a rotation groove 42; or, both the front and rear end surfaces of each pipe segment unit 31 are provided with a rotation ear 41; or, both the front and rear end surfaces of each pipe segment unit 31 are provided with a rotation groove 42. Furthermore, in the present application, only some adjacent pipe segment units 31 may be rotationally connected by the aforementioned riveted structure, while other adjacent pipe segment units may be rotationally connected by other structural members, such as rivets, etc., which is not limited in the present application.

[0064] According to some optional embodiments, in two adjacent pipe segment units 31 connected by the first riveting structure 32 or the second riveting structure 33, a limiting protrusion 444 is provided on the end surface of one pipe segment unit 31 facing the other pipe segment unit 31.

[0065] When two adjacent pipe segment units 31 connected by the first riveting structure 32 or the second riveting structure 33 are rotated relative to each other to the limit position, the limiting protrusion 444 abuts against the end surface of the other pipe segment unit 31 in a limiting manner.

[0066] In the above scheme, a limiting protrusion 444 is provided on the end face of one of the two adjacent pipe segment units 31 connected by the first riveted structure 32 or the second riveted structure 33, and the limiting protrusion 444 can be in limiting contact with the end face of the other pipe segment unit 31 to prevent the two adjacent pipe segment units from continuing to rotate relative to each other after rotating to the limit position; and the limiting protrusion 444 is provided on the end face of the pipe segment unit 31, so that the main body of one of the pipe segment units 31 can be used to limit the other pipe segment unit, thereby improving the limiting stability between the two adjacent pipe segment units.

[0067] In some optional embodiments, the pipe segment unit 31 is entirely wire-cut, and the spacing between adjacent pipe segment units 31 is small, so that each pipe segment unit 31 will have a certain axial deviation from the pipe segment units 31 adjacent to its two ends, resulting in a certain inclination angle. The pipe segment unit 31 can achieve a universal bending effect of the pipe segment unit 31 through the bending characteristics of the first riveted structure 32 and the second riveted structure 33 in four directions.

[0068] According to some optional embodiments, a plurality of cutting slits are distributed on the side wall of the main body section 20 along the axial direction of the guide sheath tube, wherein:

[0069] The plurality of cutting slits include a first cutting slit 21 and a second cutting slit 22, which are staggered along the circumference of the main body section 20. Exemplarily, the main body section 20 is provided with a plurality of first cutting slits 21 and second cutting slits 22 on its sidewalls, staggering the first cutting slits 21 and second cutting slits 22 so that the main body section 20 can bend in different directions along the first cutting slits 21 and second cutting slits 22. Exemplarily, when the bending section 30 bends, the main body section 20 can also bend to a certain extent along with the bending section 30.

[0070] In some optional embodiments, the first cutting slit 21 may be formed by at least two first sub-cutting slits that are spaced apart from each other, and the second cutting slit 22 may be formed by at least two second sub-cutting slits that are spaced apart from each other.

[0071] And / or, at least part of the cutting seams are inclined at a first angle relative to the axial direction of the main body section 20. Exemplarily, the first cutting seam 21 is inclined at an angle a relative to the axis of the main body section 20, and the second cutting seam 22 is inclined at an angle a relative to the axis L4 of the main body section 20. Optionally, the angle of the first cutting seam 21 relative to the main body section 20 and the angle of the second cutting seam 22 relative to the axis of the main body section 20 may be equal or unequal. In the present application, the cutting seam of the main body section 20 adopts an oblique arc cutting method, which is simple to cut, has strong rigidity and strong flexibility. At the same time, the oblique arc cutting method can enable the main body section 20 to better remove dirt on the inner wall of the pipe 10 during the cleaning process, ensure the cleanliness of the inner wall of the pipe 10, and avoid the risk of infection during the clinical process.

[0072] According to some optional embodiments, the first angle is not less than 30°.

[0073] In the above embodiment, the first cutting slit 21 has a first axial angle of not less than 30° relative to the main body section 20, such as 30°, 45°, 60°, etc.; and the second cutting slit 22 has a first axial angle of not less than 30° relative to the main body section 20, such as 30°, 45°, 60°, etc. In the present application, the first angle is preferably set to 45°. This cutting method can better clean the inner wall of the pipeline 10 during the cleaning process, avoiding the risk of infection due to incomplete cleaning of the pipeline 10 during clinical procedures.

[0074] A second aspect of the present application provides a guide sheath, comprising the above-mentioned tube for the guide sheath.

[0075] According to some optional embodiments, the guide sheath further includes an outer covering layer, which is sleeved on the outer wall of the guide sheath tube.

[0076] In the above solution, the guide sheath is a composite tube, and the outer wall of the guide sheath fitting is coated with an outer layer. The guide sheath fitting is made of stainless steel and cut in one piece to meet the bending and rigidity requirements of the guide sheath fitting. The outer layer is heat shrink tubing. After the heat shrink tubing is completely applied to the guide sheath fitting, a heat gun is used to move along the axial direction of the guide sheath to heat the heat shrink tubing, so that the heat shrink tubing tightly wraps around the guide sheath fitting, ensuring the guide sheath's sealing. For example, the outer coating of the heat shrink tubing in the curved section 30 corresponding to the guide sheath tubing is made of medical FEP material to ensure that the curved section 30 does not collapse when not under stress, facilitating the subsequent insertion and removal of the guide sheath tubing and the sealing function, as well as facilitating the smooth passage of the endoscope insertion portion and dilator through the guide sheath, thereby avoiding squeezing of the optical components of the insertion portion; the outer coating of the heat shrink tubing in the main section 20 corresponding to the guide sheath tubing is made of medical LDPE material to ensure the sealing of the guide sheath tubing. The guide sheath in this application consists of an outer coating and a guide sheath tubing, which are only two layers. This ensures the required rigidity and curvature of the guide sheath, making it easier for the endoscope insertion portion to drive the guide sheath to bend and easier to adjust the guide sheath toward the target surgical area.

[0077] The third aspect of the present application provides a guiding device, comprising a dilator and the above-mentioned guide sheath, wherein the dilator can pass through the guide sheath. In the above solution, the dilator can pass through the channel 10 of the guide sheath along the guide wire to prepare for subsequent surgery.

[0078] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0079] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A tube for an introducer sheath, characterized in that: include: The guide sheath tube has a pipe (10), the pipe (10) is extended along the axial direction of the guide sheath tube, and the pipe (10) is used to insert the insertion part of the endoscope; The guide sheath tube comprises a main body section (20) and a curved section (30), wherein the proximal end of the curved section (30) is connected to the distal end of the main body section (20); wherein the curved section (30) comprises a plurality of tube segment units (31) distributed along the axial direction of the guide sheath tube, and the tube segment units (31) comprise a first riveting structure (32) and a second riveting structure (33); The pipe segment unit (31) is rotatably connected to the pipe segment units at both ends thereof via the first riveting structure (32) and the second riveting structure (33); The rotation axes of the first riveted structure (32) and the second riveted structure (33) intersect.

2. The guide sheath tube according to claim 1, wherein: The first riveted structure (32) and the second riveted structure (33) both comprise a first riveted portion (321) and a second riveted portion (322), wherein: The first riveted portion (321) and the second riveted portion (322) are distributed along the same radial direction of the guide sheath tube; or, The first riveted portion (321) and the second riveted portion (322) are distributed in a radially deviated manner along the guide sheath tube.

3. The guide sheath tube according to claim 1, wherein: The guide sheath tube is an integrally cut structure.

4. The guide sheath tube according to claim 1, wherein: The first riveted structure (32) and the second riveted structure (33) of the pipe segment unit (31) are respectively rotatably connected to the pipe segment units at both ends thereof through the cooperation of the rotating ears (41) and the rotating grooves (42); The rotating ear (41) and the rotating groove (42) are respectively provided on two adjacent pipe segment units (31), and the rotating ear (41) is rotatably provided in the rotating groove (42); When two adjacent pipe segment units (31) connected by the first riveting structure (32) or the second riveting structure (33) are relatively rotated to an extreme position, the two adjacent pipe segment units (31) are limitedly abutted, and an avoidance gap (43) is provided between the rotating ear (41) and the bottom wall of the rotating groove (42).

5. The tube for the guide sheath according to claim 4, wherein: In two adjacent pipe segment units (31) connected by the first riveting structure (32) or the second riveting structure (33), a limiting protrusion (444) is provided on the end surface of one of the pipe segment units (31) facing the other pipe segment unit (31); When two adjacent pipe segment units (31) connected by the first riveting structure (32) or the second riveting structure (33) are relatively rotated to an extreme position, the limiting protrusion (444) is in limiting contact with the end face of the other pipe segment unit (31).

6. The tube for the guide sheath according to claim 1, wherein: A plurality of cutting slits are distributed on the side wall of the main body section (20) at intervals along the axial direction of the guide sheath tube, wherein: The plurality of cutting slits include a first cutting slit (21) and a second cutting slit (22), wherein the first cutting slit (21) and the second cutting slit (22) are staggered along the circumference of the main body segment (20); and / or, At least part of the cutting seam is inclined at a first angle relative to the axial direction of the main body section (20).

7. The tube for the guide sheath according to claim 6, wherein: The first angle is not less than 30°.

8. A guide sheath, characterized in that: The invention comprises the tubular fitting for the guide sheath according to any one of claims 1 to 7.

9. The introducer sheath according to claim 8, wherein: The guide sheath further comprises an outer covering layer, and the outer covering layer is sleeved on the outer wall of the guide sheath tube.

10. A guiding device, characterized in that: The invention comprises a dilator and an introducer sheath according to any one of claims 8 to 9, wherein the dilator can pass through the introducer sheath.

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