Guiding sheath tube and biliopancreatic endoscope system

Abstract

The invention discloses a guiding sheath tube and a biliopancreatic endoscope system. The guiding sheath tube comprises a sheath tube handle, an intervention sheath tube and a connecting piece, and the sheath tube handle is connected to the far end of an insertion tube fitting; the intervention sheathing canal is connected to the far end of the sheathing canal handle; the connecting piece comprises a deformation section, the near end and the far end of the connecting piece are connected to the side walls of the same sides of the operation main body and the sheathing canal handle respectively, so that at least the deformation section and at least partial pipe section of the insertion pipe fitting are arranged side by side, and when the insertion pipe fitting moves, the deformation section moves synchronously; and the deformation section is formed by sequentially connecting a plurality of sections of cross shaft universal joints. In the matching process of the biliopancreatic endoscope and the guide sheathing canal, the coaxiality of the biliopancreatic endoscope and the guide sheathing canal can be sufficiently guaranteed, so that the matching between the biliopancreatic endoscope and the guide sheathing canal is flexible and accurate, and finally the operation convenience and the use reliability of operators are improved.

Description

Technical Field

[0001] This invention relates to the field of biliary and pancreatic endoscopy systems, specifically to a guide sheath and a biliary and pancreatic endoscopy system. Background Technology

[0002] As a minimally invasive medical device for examination and treatment, the biliary and pancreatic endoscope is primarily used for the diagnosis and treatment of various diseases. In practical applications, the insertion section of the biliary and pancreatic endoscope can be inserted into the body through natural orifices or a small surgical incision, guided by a sheath. During this process, doctors can clearly observe the internal condition of the body, diagnose various diseases, and administer various auxiliary treatments based on the external central control equipment of the biliary and pancreatic endoscope system.

[0003] As described above, the sheath is attached to the insertion section of the biliary and pancreatic endoscope, serving as an instrument to facilitate the smooth insertion of the endoscope into the designated position within the body. This combination is widely used, especially in biliary and pancreatic duct examinations. However, currently, the most common method of attaching the biliary and pancreatic endoscope and sheath is through binding or attachment. This method, in order to enhance the connection strength, imposes excessive constraints on the sheath's movement. This results in poor overall mobility of the biliary and pancreatic endoscope and sheath during insertion and examination, causing inconvenience for the doctor's operation. Summary of the Invention

[0004] The main objective of this invention is to propose a guiding sheath and biliary pancreatic endoscope system, which aims to solve the problem of poor overall flexibility of traditional biliary pancreatic endoscopes and sheaths.

[0005] To achieve the above objectives, the present invention provides a guide sheath for connection to a biliary and pancreatic endoscope, characterized in that the guide sheath comprises:

[0006] A sheath handle for connecting to the distal end of the insertion tube in the pancreatobiliary endoscope;

[0007] An interventional sheath, connected to the distal end of the sheath handle; and,

[0008] A connector, including a deformable section, wherein the proximal and distal ends of the connector are respectively connected to the same side wall of the operating body and the sheath handle in the biliary and pancreatic endoscope, such that at least the deformable section is arranged side by side with at least a partial section of the insertion tube, and the deformable section moves synchronously when the insertion tube moves.

[0009] The deformable section is composed of multiple cross-shaped universal joints connected in sequence.

[0010] Optionally, the maximum bending angle of each of the cross-shaped universal joints is not less than 20° and not more than 30°.

[0011] Optionally, each pair of adjacent universal joint segments can be detachably connected, so that the number of universal joint segments in the deformed segment can be selectively adjusted.

[0012] Optionally, when no lateral bending deformation occurs, at least the central axis of the deformed segment and the central axis of the inserted tube remain parallel or nearly parallel.

[0013] Optionally, the connector further includes two connecting segments, namely a first connecting segment located at the proximal end of the deformable segment and a second connecting segment located at the distal end of the deformable segment, wherein the first connecting segment is used to connect to the side wall of the operating body and the second connecting segment is connected to the side wall of the sheath handle;

[0014] The first connecting segment and the operating body, and / or the second connecting segment and the sheath handle have a relative travel distance in the proximal direction.

[0015] Optionally, the side wall of the operating body and / or the side wall of the sheath handle protrudes laterally to form a boss, and the boss is provided with an insertion hole along the proximal direction;

[0016] The corresponding connecting segment is movably inserted into the socket along the proximal direction so that the relative movement can be performed under external force.

[0017] Optionally, a stop step is formed by a lateral protrusion at the connection between the connecting segment and the deformable segment. When the connecting segment moves to abut against the boss, the stop step restricts the continued movement of the connecting member.

[0018] Optionally, the boss is integrally formed with the corresponding side wall of the operating body and / or the sheath handle; or,

[0019] The boss and the corresponding side wall of the operating body and / or the sheath handle are detachably or non-detachably connected after being separately formed.

[0020] Optionally, the connector further includes two connecting segments, namely a first connecting segment located at the proximal end of the deformable segment and a second connecting segment located at the distal end of the deformable segment, wherein the first connecting segment is used to connect to the side wall of the operating body and the second connecting segment is connected to the side wall of the sheath handle;

[0021] The first connecting segment and the operating body, and the second connecting segment and the sheath handle are respectively rotatably arranged around an axis extending in the proximal and distal directions.

[0022] Optionally, the guide sheath further includes fasteners;

[0023] After the first connecting segment and the operating body have moved into position, the fastener locks and secures the first connecting segment and the operating body; and / or,

[0024] After the second connecting section and the sheath handle are moved into place, the fastener locks and secures the second connecting section and the sheath handle.

[0025] Optionally, the insertion tube is rotatable about its own axis relative to the operating body, and the deformable section rotates synchronously during the movement.

[0026] Optionally, the insertion fitting includes a bent section;

[0027] Relative to the operating body, the bent pipe section can bend and deform laterally, and during the lateral bending process, the deformed section bends synchronously.

[0028] Furthermore, to achieve the above objectives, the present invention also provides a biliary and pancreatic endoscopic system, comprising:

[0029] A biliary and pancreatic endoscope, comprising an operating body and an insertion tube, wherein the insertion tube is movably disposed relative to the operating body; and...

[0030] The guiding sheath as described above.

[0031] In the technical solution provided by this invention, after the guide sheath is assembled into the biliary and pancreatic endoscope, the sheath handle is movably connected to the distal end of the insertion tube. Connectors connect the operating body and the sheath handle respectively, such that the deformable section of the connector and the insertion tube are arranged side-by-side. Thus, when the insertion tube is not subjected to external force and remains essentially straight, the deformable section is essentially parallel to it, facilitating the smooth insertion of the insertion tube by the guide sheath. When the insertion tube moves relative to the operating body under external force, the deformable section moves accordingly, ensuring a high degree of synchronization between the sheath handle and the biliary and pancreatic endoscope.

[0032] Next, the deformable section is composed of multiple universal joint segments connected sequentially. This design ensures the overall structure of the connector remains simple, and the overall length of the deformable section can be easily adjusted by increasing or decreasing the number of universal joint segments. Furthermore, it guarantees the coaxiality of the endoscope and guide sheath during their engagement, resulting in a flexible yet precise connection between the endoscope and sheath handle. Ultimately, this improves the operator's ease of use and reliability. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments 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 the structures shown in these drawings without creative effort.

[0034] Figure 1 A three-dimensional schematic diagram of an embodiment of the biliary and pancreatic endoscopy system provided by the present invention;

[0035] Figure 2 for Figure 1 An exploded schematic diagram of the main structure of the central biliary pancreatic endoscopy system;

[0036] Figure 3 for Figure 1 A schematic diagram of a biliary pancreatic endoscope;

[0037] Figure 4 for Figure 1 Assembly diagram of the middle sheath handle and the intervention sheath;

[0038] Figure 5 for Figure 1 A three-dimensional schematic diagram of the connecting component;

[0039] Figure 6 for Figure 5 A magnified structural diagram of point A in the middle.

[0040] Explanation of icon numbers:

[0041] 100. Endoscope for biliary and pancreatic diseases; 110. Operating body; 111. First boss; 112. First insertion port; 120. Insertion tube; 121. Bent tube section; 200. Guide sheath; 210. Sheath handle; 211. Second boss; 212. Second insertion port; 220. Intervention sheath; 230. Connector; 231. First connecting section; 232. Deformed section; 232a. Cross shaft; 232b. First universal joint fork; 232c. Second universal joint fork; 233. Second connecting section; 234. First stop step; 235. Second stop step.

[0042] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0044] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0045] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0046] Please see Figures 1 to 6 The present invention provides a guide sheath 200 and an applicable biliary and pancreatic endoscopy system thereof.

[0047] For ease of understanding, the following explanations will use the guide sheath 200 and its applicable biliary and pancreatic endoscopy systems as examples with corresponding proximal and distal directions.

[0048] The biliary and pancreatic endoscopy system includes a biliary and pancreatic endoscope 100 and a guide sheath 200.

[0049] Please combine Figures 1 to 3 The biliary and pancreatic endoscope 100 includes an operating body 110 and an insertion tube 120. The operating body 110 is designed for easy hand-held operation by the user, specifically, it may be designed as a handle, a gun, or a grip. An installation cavity is formed inside the operating body 110. An installation hole is provided at the distal end of the installation cavity along the proximal direction. The proximal section of the insertion tube 120 passes through this installation hole and is fitted into the installation cavity via this hole.

[0050] The insertion tube 120 is generally elongated in shape along the proximal-distal direction. The proximal section of the insertion tube 120 is connected to the operating body 110. In actual operation, at least the distal section of the insertion tube 120 is inserted into the patient's body so that the tip structure provided at the distal end of the insertion tube 120 can smoothly enter the designated position in the patient's body.

[0051] The head end structure can be equipped with at least one electronic component as needed. This electronic component may include, but is not limited to, imaging devices such as CMOS. The imaging device can capture image information at a designated location. Furthermore, the electronic component may also include an illumination device. This illumination device can illuminate the designated location, making the image information captured by the imaging device clearer and more accurate. This also makes the subsequent intervention of medical instruments, such as medical forceps, based on the biliary and pancreatic endoscope 100 simpler, more efficient, and more precise.

[0052] In this invention, the insertion tube 120 is configured to be movable relative to the operating body 110.

[0053] Specifically, the insertion tube 120, relative to the operating body 110, can rotate about its own axis (i.e., basically along an axis extending from proximal to distal). This rotation allows for adjustment of the imaging orientation of components such as imaging devices in the head-end structure.

[0054] Or more specifically, the insert fitting 120 is configured such that at least a portion of the fitting is laterally bendable. That is, at least a portion of the insert fitting 120 constitutes a bent section 121. This bent section 121 can be bent and deformed in its radial direction. Thus, during its lateral bending, the orientation of the head end structure of the insert fitting 120 and the extension direction of at least its distal portion can be changed.

[0055] Of course, in practical applications, the bent pipe segments 121 of the insert fitting 120 can be set to multiple according to actual needs. Furthermore, each bent pipe segment 121 is arranged sequentially or at intervals along the axial direction of the insert fitting 120. The deformation (bending angle) of each bent pipe segment 121 can be set to be the same. Alternatively, at least two bent pipe segments 121 can be set to have different deformation (bending angles).

[0056] Each curved pipe segment 121 can have one or at least two lateral bending directions. Specifically, when each curved pipe segment 121 has two lateral bending directions, these two lateral bending directions can be two opposite directions along the same radial line. When each curved pipe segment 121 has four lateral bending directions, two of these four lateral bending directions can be two opposite directions along one radial line. The remaining two can also be two opposite directions along another radial line. And so on, without further detail.

[0057] Of course, at least one functional component may also be assembled inside or outside the mounting cavity of the operating body 110. This functional component may include, but is not limited to, a traction mechanism, an inlet structure, an outlet structure, etc., for adjusting the bending movement of the curved pipe section 121.

[0058] The guiding sheath 200 includes a sheath handle 210, an intervention sheath 220, and a connector 230.

[0059] Please combine Figures 1 to 4 The sheath handle 210 is used to connect to the distal end of the insertion tube 120 in the biliary and pancreatic endoscope 100. The interventional sheath 220 is connected to the distal end of the sheath handle 210.

[0060] Specifically, the sheath handle 210 includes a housing. The housing has at least one channel extending through it in the proximal direction. The distal section of the channel allows for insertion and connection of the proximal section of the interventional sheath 220, enabling communication between the interventional sheath 220 and the through-hole. Subsequently, the proximal section of the channel allows for the insertion of the distal section of the insertion fitting 120, and, depending on actual needs, the distal section of the insertion fitting 120 can be located within the channel. Alternatively, the distal section of the insertion fitting 120 can enter the interventional sheath 220. Or, the tip structure of the insertion fitting 120 can extend from the distal end of the interventional sheath 220, etc.

[0061] As described above, the central axes of the insertion tube 120, sheath handle 210, and intervention sheath 220 are approximately collinear or parallel. In this case, the connector 230 is positioned beside this central axis. Specifically, the connector 230 may include a deformable section 232. The proximal end of the connector 230 is connected to the side wall of the operating body 110. The distal end of the connector 230 is connected to the side wall of the sheath handle 210 on the same side. This ensures that at least the deformable section 232 and the insertion tube 120 can be arranged side-by-side. When the insertion tube 120 moves, the deformable section 232 is stressed and can move synchronously.

[0062] Among them, the deformable section 232 is composed of multiple cross-shaft universal joints connected in sequence.

[0063] In the technical solution provided by this invention, after the guide sheath 200 is assembled into the biliary and pancreatic endoscope 100, the sheath handle 210 is movably connected to the distal end of the insertion tube 120. The connector 230 connects the operating body 110 and the sheath handle 210 respectively, so that the deformable section 232 of the connector 230 and the insertion tube 120 are arranged side by side.

[0064] Thus, when the insertion tube 120 is not subjected to external force and remains basically straight, the deformed section 232 is basically parallel to it, which facilitates the smooth insertion of the insertion tube 120 by the guide sheath 200.

[0065] When the insertion tube 120 moves relative to the operating body 110 under the drive of external force, the deformable section 232 moves accordingly, ensuring a high degree of synchronization between the sheath handle 210 and the biliary and pancreatic endoscope 100.

[0066] Next, the deformable section 232 is composed of multiple universal joint segments connected sequentially. On the one hand, this ensures the overall structure of the connector 230 remains simple, and the overall length of the deformable section 232 can be easily adjusted by increasing or decreasing the number of universal joint segments. On the other hand, it ensures the coaxiality of the endoscope 100 and the guide sheath 200 during their engagement. This makes the engagement between the endoscope 100 and the sheath handle 210 both flexible and precise, ultimately improving the operator's ease of use and reliability.

[0067] Please refer to the details. Figures 5 to 6 In practical applications, the deformable section 232 can be composed of at least one cross-shaped universal joint. Each cross-shaped universal joint may include, for example, a cross-shaped shaft body 232a, a first universal joint fork 232b, and a second universal joint fork 232c.

[0068] The cross shaft 232a forms a first axis T1 and a second axis T2. The first axis T1 and the second axis T2 are arranged intersecting each other. Preferably, the first axis T1 and the second axis T2 are perpendicular or nearly perpendicular.

[0069] The first universal joint fork 232b can be rotatably mounted on the cross shaft 232a about the first axis T1, so as to produce bending deformation relative to the cross shaft 232a in the direction of the second axis T2. Similarly, the second universal joint fork 232c can be rotatably mounted on the cross shaft 232a about the second axis T2, so as to produce bending deformation relative to the cross shaft 232a in the direction of the first axis T1. This allows each universal joint to form four-way bending, making the movement of the deformable section 232 more flexible.

[0070] By setting the specific structure of each universal joint, such as setting or not setting a stop structure on the rotation trajectory of the first universal joint fork 232b and / or the second universal joint fork 232c, the range of lateral bending angles for each universal joint can be adjusted.

[0071] When the number of cross-shaped universal joints installed at the same deformation segment 232 is set to at least two, the maximum bending angle of each cross-shaped universal joint can be set to be the same. Alternatively, depending on actual needs, the maximum bending angle of at least two cross-shaped universal joints can be set to be different.

[0072] In one specific embodiment, the maximum bending angle of each universal joint is not less than 20° and not more than 30°. Preferably, the maximum bending angle of each universal joint can be set to 25°.

[0073] Similarly, when the number of cross-shaft universal joints set at the same deformation segment 232 is set to at least two, the maximum bending angle of the entire deformation segment 232 is basically equivalent to the sum of the maximum bending angles of all the cross-shaft universal joints within it.

[0074] For example, when the maximum bending angle of the universal joint is 25° and the number of segments of the universal joint in the same deformation segment 232 is 10, the deformation segment 232 can achieve a lateral bending of at least 180°.

[0075] In practical applications, each pair of adjacent cross shaft universal joints can be detachably connected, so that the number of cross shaft universal joints in the deformable section 232 can be selectively adjusted.

[0076] It is understandable that when the total length of the deformable segment 232 remains constant, the number of segments and the maximum bending angle of the universal joints can be flexibly adjusted by combining universal joints of different lengths. Specifically, the length of the universal joint can be determined by the length of the first universal joint fork 232b and / or the second universal joint fork 232c. For example, when the required maximum bending angle is small, the deformable segment 232 can be obtained by assembling a smaller number of longer universal joints. Conversely, when the required maximum bending angle is large, the deformable segment 232 can be obtained by assembling a larger number of shorter universal joints.

[0077] Of course, the total length of the deformable segment 232 can also be set to be adjustable. In this case, as mentioned above, it can be spliced ​​by combining universal joints of different lengths. Or, more simply, it can be spliced ​​by combining universal joints of the same length. This allows for flexible adjustment of the number of universal joint segments and the maximum bending angle, while making the overall forming of the deformable segment 232 as simple as possible.

[0078] Since the deformable section 232 needs to deform in tandem with the insert fitting 120, in the initial state, that is, when the insert fitting 120 is not undergoing axial rotation or lateral bending, the central axis of the deformable section 232 and the central axis of the bent section 121 should be kept parallel or nearly parallel. In this way, the coaxiality of the deformable section 232, which is composed of a universal joint, can be fully utilized. When the insert fitting 120 rotates axially, it can drive the sheath handle 210 to rotate coaxially. Similarly, when the bent section 121 of the insert fitting 120 undergoes lateral bending deformation, it can drive the deformable section 232 to undergo synchronous lateral bending deformation, thereby causing the sheath handle 210 to swing in the same direction.

[0079] As described above, the proximal end of connector 230 is connected to the operating body 110, and the distal end of connector 230 is connected to the sheath handle 210. For details, please refer to... Figures 1 to 4 The connector 230 also includes two connecting sections. The two connecting sections are a first connecting section 231 located near the proximal end of the deformable section 232, and a second connecting section 233 located at the distal end of the deformable section 232. The first connecting section 231 is used to connect to the side wall of the operating body 110. The second connecting section 233 is connected to the side wall of the sheath handle 210.

[0080] In one specific embodiment, the first connecting segment 231 and the operating body 110, and / or the second connecting segment 233 and the sheath handle 210, have a relative travel distance in the proximal direction. This allows the distance between the sheath handle 210 and the operating body 110 in the proximal direction to be adjustable. Consequently, the depth to which the insertion tube 120 enters the sheath handle 210 and / or the insertion sheath 220 is also adjustable.

[0081] Specifically, the first connecting segment 231 may remain relatively fixed to the operating body 110, while the second connecting segment 233 may have a relative travel distance with the sheath handle 210. Alternatively, the first connecting segment 231 may have a relative travel distance with the operating body 110, while the second connecting segment 233 may remain relatively fixed to the sheath handle 210. Alternatively, the first connecting segment 231 may have a relative travel distance with the operating body 110, and the second connecting segment 233 may also have a relative travel distance with the sheath handle 210.

[0082] If we take Figures 1 to 4 Taking the structure as an example, the side wall of the operating body 110 protrudes laterally to form a first boss 111. The first boss 111 has a first insertion hole 112 extending through it in the proximal direction. The side wall of the sheath handle 210 protrudes laterally to form a second boss 211. The second boss 211 has a second insertion hole 212 extending through it in the proximal direction.

[0083] At this time, the first connecting segment 231 can be movably inserted into the first socket 112 along the proximal direction. And / or the second connecting segment 233 can be movably inserted into the second socket 212 along the proximal direction to perform the above-mentioned relative movement stroke.

[0084] Among them, the connection between the connecting section and the deformable section 232 protrudes laterally to form a stop step. When the connecting section moves to abut against the boss, the stop step restricts the continued movement of the connecting member 230.

[0085] For example, a first stop step 234 is formed at the connection between the first connecting segment 231 and the deformable segment 232. The first stop step 234 can abut against the distal surface of the first boss 111 when the insertion depth of the first connecting segment 231 in the first insertion hole 112 reaches a preset maximum limit value, thereby restricting the further insertion of the first connecting segment 231.

[0086] Similarly, a second stop step 235 is formed at the connection between the second connecting segment 233 and the deformable segment 232. The second stop step 235 can abut against the distal surface of the second boss 211 when the insertion depth of the second connecting segment 233 in the second socket 212 reaches a preset maximum limit value, thereby restricting the further insertion of the second connecting segment 233.

[0087] Furthermore, depending on actual needs, the connecting section may also be equipped with a limiting part. The boss is equipped with a mating part. During relative movement, the limiting part and the mating part cooperate to prevent the connecting section from dislodging out of the insertion hole. The limiting part can be a limiting protrusion, and the mating part is correspondingly configured as a mating groove.

[0088] For example, a first limiting protrusion is formed at a position between the first connecting segment 231 and the deformed segment 232, and a first mating groove is provided correspondingly for the first boss 111. The first limiting protrusion can connect with the first mating groove when the insertion depth of the first connecting segment 231 in the first insertion hole 112 reaches a preset minimum limit value, thereby restricting the further disengagement of the first connecting segment 231.

[0089] Similarly, a second limiting protrusion is formed at a position between the second connecting segment 233 and the deformed segment 232, and a second mating groove is provided correspondingly for the second boss 211. The second limiting protrusion can connect with the second mating groove when the insertion depth of the second connecting segment 233 in the second insertion hole 212 reaches a preset minimum limit value, thereby restricting the further disengagement of the second connecting segment 233.

[0090] In addition, also with Figures 1 to 4 Taking the structure as an example, the side wall of the operating body 110 protrudes laterally to form a first boss 111. The first boss 111 has a first insertion hole 112 extending through it in the proximal direction. The side wall of the sheath handle 210 protrudes laterally to form a second boss 211. The second boss 211 has a second insertion hole 212 extending through it in the proximal direction.

[0091] At this time, the first connecting segment 231 is inserted into the first socket 112, and the first connecting segment 231 is rotatable relative to the first socket 112 about an axis extending in the proximal direction. Similarly, the second connecting segment 233 is inserted into the second socket 212, and the second connecting segment 233 is rotatable relative to the second socket 212 about an axis extending in the proximal direction.

[0092] As described above, the deformable segment 232, composed of multiple cross-shaped universal joints, possesses a certain lateral bending capability. However, the bending direction of the cross-shaped universal joint is limited, for example... Figures 5 to 6In the structure shown, the universal joint can be bent around the first axis T1 and the second axis T2 respectively. At this time, by operating the relative rotation between the first connecting section 231 and the first socket 112, and between the second connecting section 233 and the second socket 212, the first axis T1 and the second axis T2 can be adjusted to a suitable position. Especially when the deformable section 232 needs to follow the bending pipe section 121 for lateral bending deformation, the following of the two is more flexible and effective.

[0093] It should be noted that the relative movements (movements and / or rotations) between the first connecting segment 231 and the first socket 112, and between the second connecting segment 233 and the second socket 212, can all be performed before the intervention operation is carried out.

[0094] Furthermore, the guide sheath 200 also includes fasteners. After the first connecting segment 231 is moved (moved and / or rotated) into position between itself and the operating body 110, the fasteners lock and secure the first connecting segment 231 to the operating body 110. This prevents relative movement between the first connecting segment 231 and the operating body 110 during intervention. And / or, after the second connecting segment 233 is moved (moved and / or rotated) into position between itself and the sheath handle 210, the fasteners lock and secure the second connecting segment 233 to the sheath handle 210. This prevents relative movement between the second connecting segment 233 and the sheath handle 210 during intervention.

[0095] It should be noted that when the deformable section 232 follows the bending section 121 in a lateral bending deformation, a certain degree of freedom of movement can be reserved between the first connecting section 231 and the operating body 110, and / or between the second connecting section 233 and the sheath handle 210, to accommodate the difference in bending radii between the deformable section 232 and the bending section 121. During this process, the connection strength between the operating body 110 and the guide sheath 200 is sufficiently ensured by the connector 230.

[0096] The first protrusion 111 and the operating body 110, and / or the second protrusion 211 and the sheath handle 210, can be integrally formed. This eliminates the need for disassembly and assembly of the first protrusion 111 and the operating body 110, and the second protrusion 211 and the sheath handle 210, and ensures sufficient connection strength between the first protrusion 111 and the operating body 110, and between the second protrusion 211 and the sheath handle 210.

[0097] Alternatively, the first boss 111 and the operating body 110, and / or the second boss 211 and the sheath handle 210, can be detachably or non-detachably connected after being separately formed. In this way, the materials, forming methods, dimensions, and shapes of the first boss 111 and the operating body 110, and / or the second boss 211 and the sheath handle 210, can be adjusted according to actual needs, such as the manufacturing materials, forming methods, dimensions, and shapes. This makes the structure of the first boss 111 and the operating body 110, and / or the second boss 211 and the sheath handle 210, more in line with actual requirements.

[0098] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A guide sheath for connection to a biliary and pancreatic endoscope, characterized in that, The guiding sheath includes: A sheath handle for connecting to the distal end of the insertion tube in the pancreatobiliary endoscope; An interventional sheath, connected to the distal end of the sheath handle; and, A connector, including a deformable section, wherein the proximal and distal ends of the connector are respectively connected to the same side wall of the operating body and the sheath handle in the biliary and pancreatic endoscope, such that at least the deformable section is arranged side by side with at least a partial section of the insertion tube, and the deformable section moves synchronously when the insertion tube moves. The deformable section is composed of multiple cross-shaped universal joints connected in sequence.

2. The guiding sheath as described in claim 1, characterized in that, The maximum bending angle of each of the aforementioned cross-shaped universal joints shall be no less than 20° and no more than 30°.

3. The guiding sheath as described in claim 1, characterized in that, The universal joints of each pair of adjacent segments are detachably connected, so that the number of segments of the universal joints in the deformed segment can be selectively adjusted.

4. The guiding sheath as described in claim 1, characterized in that, When no lateral bending deformation occurs, at least the central axis of the deformed segment and the central axis of the inserted pipe remain parallel or nearly parallel.

5. The guiding sheath as described in claim 1, characterized in that, The connector further includes two connecting segments, namely a first connecting segment located at the proximal end of the deformable segment and a second connecting segment located at the distal end of the deformable segment. The first connecting segment is used to connect to the side wall of the operating body, and the second connecting segment is connected to the side wall of the sheath handle. The first connecting segment and the operating body, and / or the second connecting segment and the sheath handle have a relative travel distance in the proximal direction.

6. The guiding sheath as described in claim 5, characterized in that, The side wall of the operating body and / or the side wall of the sheath handle protrudes laterally to form a boss, and the boss is provided with an insertion hole along the proximal direction; The corresponding connecting segment is movably inserted into the socket along the proximal direction so that the relative movement can be performed under external force.

7. The guiding sheath as described in claim 6, characterized in that, The connection between the connecting section and the deformable section protrudes laterally to form a stop step. When the connecting member moves to abut against the boss, the stop step restricts the continued movement of the connecting member.

8. The guiding sheath as described in claim 6, characterized in that, The boss is integrally formed with the corresponding side wall of the operating body and / or the sheath handle; or, The boss and the corresponding side wall of the operating body and / or the sheath handle are detachably or non-detachably connected after being separately formed.

9. The guiding sheath as claimed in claim 1, characterized in that, The connector further includes two connecting segments, namely a first connecting segment located at the proximal end of the deformable segment and a second connecting segment located at the distal end of the deformable segment. The first connecting segment is used to connect to the side wall of the operating body, and the second connecting segment is connected to the side wall of the sheath handle. The first connecting segment and the operating body, and the second connecting segment and the sheath handle are respectively rotatably arranged around an axis extending in the proximal and distal directions.

10. The guide sheath as claimed in any one of claims 5 to 9, wherein the guide sheath further comprises fasteners; After the first connecting segment and the operating body have moved into position, the fastener locks and secures the first connecting segment and the operating body; and / or, After the second connecting section and the sheath handle are moved into place, the fastener locks and secures the second connecting section and the sheath handle.

11. The guiding sheath as described in any one of claims 1 to 10, characterized in that, Relative to the operating body, the inserted tube is rotatable around its own axis, and the deformable section rotates synchronously during the movement.

12. The guiding sheath as described in any one of claims 1 to 10, characterized in that, The insertion fitting includes a curved section; Relative to the operating body, the bent pipe section can bend and deform laterally, and during the lateral bending process, the deformed section bends synchronously.

13. A biliary and pancreatic endoscopic system, characterized in that, include: A biliary and pancreatic endoscope, comprising an operating body and an insertion tube, wherein the insertion tube is movably disposed relative to the operating body; and... The guiding sheath as described in any one of claims 1 to 12.

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