A guide sheath and sheath tube assembly

Abstract

The present invention discloses a guide sheath and a sheath tube assembly, which relates to the field of medical devices. The guide sheath includes a sheath tube body and a telescopic assembly. The sheath tube body has a receiving cavity, and the telescopic assembly has a first end and a second end that are relatively far apart. The first end is connected to the sheath tube body and communicates with the receiving cavity, and the second end is sealed and telescopically arranged relative to the sheath tube body. The sheath tube body is inserted into the body of a doctor or patient, such as the kidney of the doctor or patient. The insertion part of the endoscope is inserted into the receiving cavity and moves into the telescopic assembly until the endoscope abuts against the second end. Medical staff can continue to push the insertion part to move, and the insertion part drives the telescopic assembly to extend the telescopic assembly out of the sheath tube body. The insertion part can also extend out of the sheath tube body together with the telescopic assembly to prevent the sheath tube body from affecting the field of view of the camera module of the insertion part. The insertion part independently extends out of the sheath tube body, and the size of the insertion part is smaller than the sheath tube body, so that the insertion part can enter a narrower area, thereby improving the use effect of the guide sheath.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a guide sheath and a sheath tube assembly. Background Art

[0002] Guide sheaths and endoscopes are high-precision medical devices specially designed and widely used in the field of urinary system inspection and treatment. As an auxiliary tool, the guide sheath is usually used to guide the endoscope or other medical devices into the urinary system to ensure the accuracy and safety of the operation. Its design fully considers the physiological structure of the human urinary system, can effectively reduce trauma and complications during surgery, and improve the success rate of surgery and the speed of patient recovery.

[0003] The existing guide sheath is a semi-enclosed pipe, and the insertion part of the endoscope is inserted into the pipe. The endoscope is located in the semi-enclosed pipe, and the endoscope does not make direct or indirect contact with the patient's internal tissues, which reduces the disinfection requirements of the endoscope. However, the insertion part of the endoscope will also be restricted in the guide sheath, the range of movement of the insertion part is limited, and the field of view of its camera module will also be limited, which hinders medical staff from observing the affected area and affects the treatment effect of the guide sheath and the endoscope. Summary of the invention

[0004] In view of the above shortcomings of the related technologies, the present application provides a guide sheath and sheath tube assembly to solve the above technical problems.

[0005] The present application provides a guide sheath, which includes a sheath body and a telescopic assembly. The sheath body has a accommodating cavity. The telescopic assembly has a first end and a second end that are relatively far apart. The first end is connected to the sheath body and communicates with the accommodating cavity, and the second end is sealed and telescopically arranged relative to the sheath body.

[0006] In one embodiment of the present application, at least a portion of the telescopic component extends into the accommodating cavity, and the first end is connected to a cavity wall forming the accommodating cavity. The telescopic component is used to selectively extend or be accommodated in the accommodating cavity.

[0007] In one embodiment of the present application, the telescopic assembly includes a telescopic body and a guide member. One end of the telescopic body is sealed and the other end is connected to the guide member. The guide member is embedded in the accommodating cavity and is interconnected with the cavity wall forming the accommodating cavity.

[0008] In one embodiment of the present application, a clamping portion is disposed at the second end, and the clamping portion is used to clamp an operating instrument extending into the first end.

[0009] In one embodiment of the present application, the sheath body is further provided with a limiting portion, at least a portion of which extends into the telescopic assembly, and when the limiting portion and the second end abut against each other, the clamping portion is clamped on the outer periphery of the limiting portion.

[0010] In one embodiment of the present application, the sheath body further has an instrument channel, which is used to insert a treatment instrument, and the second end is provided with a connecting portion, which is used to fix the distal end of the treatment instrument.

[0011] In one embodiment of the present application, the instrument channel is also configured with redundant space.

[0012] In one embodiment of the present application, at least a portion of the accommodating cavity where the telescopic assembly is located is communicated with the instrument channel, and the connecting portion is used to selectively enter or leave the instrument channel.

[0013] In one embodiment of the present application, the guide sheath includes an outflow channel, the outflow channel is spaced apart from the accommodating cavity, the instrument channel includes an instrument space and a flow space, and the flow space is used to flow the medium into the distal end of the sheath tube;

[0014] Alternatively, the guide sheath includes an inflow channel and an outflow channel, the instrument channel is spaced apart from the inflow channel and the outflow channel, and the inflow channel and the outflow channel extend to the distal end of the guide sheath.

[0015] In one embodiment of the present application, the telescopic assembly further includes a light-transmitting seal, which is sealingly disposed at one end of the telescopic assembly away from the sheath body to form a second end.

[0016] To achieve the above objectives and other related objectives, the present application provides a sheath tube assembly, including the aforementioned guide sheath.

[0017] The technical solution adopted in the present invention can achieve the following beneficial effects: the sheath body is inserted into the body of the doctor or patient, such as the kidney of the doctor or patient. The insertion part of the endoscope is inserted into the accommodating cavity and moves into the telescopic assembly until the endoscope abuts against the second end. The medical staff can continue to push the insertion part to move, and the insertion part drives the telescopic assembly to make the telescopic assembly extend out of the sheath body. The insertion part can also extend out of the sheath body together with the telescopic assembly to avoid the sheath body affecting the field of view of the camera module of the insertion part. The insertion part independently extends out of the sheath body, and the size of the insertion part is smaller than the sheath body, so that the insertion part can enter a smaller area, thereby improving the use effect of the guide sheath. During this period, the sealed telescopic assembly can provide a relatively closed space for the insertion part, avoiding direct or indirect contact between the insertion part and the body tissue of the object being detected, thereby reducing the disinfection requirements of the endoscope. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments 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.

[0019] Figure 1 is a schematic structural diagram of a guide sheath shown in an exemplary embodiment of the present application;

[0020] Figure 2 is a schematic structural diagram of an introducer sheath from another perspective shown in an exemplary embodiment of the present application;

[0021] Figure 3 is a schematic structural diagram of a telescopic assembly shown in an exemplary embodiment of the present application;

[0022] Figure 4 is a schematic structural diagram of a guide sheath and an insertion portion shown in an exemplary embodiment of the present application;

[0023] Figure 5 is a schematic structural diagram of another guide sheath and insertion portion shown in an exemplary embodiment of the present application;

[0024] Figure 6 is a structural schematic diagram of another telescopic assembly shown in an exemplary embodiment of the present application;

[0025] Figure 7 is a schematic structural diagram of another guide sheath and insertion portion shown in an exemplary embodiment of the present application;

[0026] Figure 8 yes Figure 7 The enlarged view of point a in the figure;

[0027] Fig. 9 is a schematic structural diagram of another guide sheath and insertion portion shown in an exemplary embodiment of the present application;

[0028] Fig.10 yes Fig. 9 The enlarged view of point b in the figure;

[0029] Fig.11 is a schematic structural diagram of yet another guide sheath and insertion portion shown in an exemplary embodiment of the present application;

[0030] Fig.12 yes Fig.11 The enlarged view of point c in the figure;

[0031] Fig.13 is a schematic structural diagram of an instrument channel shown in an exemplary embodiment of the present application;

[0032] Fig.14 is a schematic structural diagram of an introducer sheath from another perspective shown in an exemplary embodiment of the present application;

[0033] Fig.15 is a schematic structural diagram of another guide sheath shown in an exemplary embodiment of the present application;

[0034] Fig.16 is a schematic structural diagram of another guide sheath shown in an exemplary embodiment of the present application;

[0035] Fig.17 It is a schematic structural diagram of a sheath tube assembly shown in an exemplary embodiment of the present application.

[0036] In the figure: 1. sheath assembly; 100. guide sheath; 110. sheath body; 111. accommodating cavity; 112. step; 113. limit portion; 114. instrument channel; 115. redundant space; 116. outflow channel; 117. inflow channel; 120. telescopic assembly; 121. first end; 122. second end; 123. light-transmitting sealing member; 124. telescopic body; 125. guide member; 126. clamping portion; 127. connecting portion; 200. insertion portion; 300. disposal instrument. DETAILED DESCRIPTION

[0037] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0038] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0039] In each embodiment of the present application, "proximal end" and "distal end" refer to the position of each component 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".

[0040] Guide sheaths and endoscopes are high-precision medical devices specially designed and widely used in the field of urinary system inspection and treatment. As an auxiliary tool, the guide sheath is usually used to guide the endoscope or other medical devices into the urinary system to ensure the accuracy and safety of the operation. Its design fully considers the physiological structure of the human urinary system, can effectively reduce trauma and complications during surgery, and improve the success rate of surgery and the speed of patient recovery.

[0041] The existing guide sheath has a semi-enclosed pipe, and the insertion part of the endoscope is inserted into the pipe. The endoscope is located in the semi-enclosed pipe, and the endoscope does not make direct or indirect contact with the patient's internal tissues, which reduces the disinfection requirements of the endoscope. However, the insertion part of the endoscope will also be restricted in the guide sheath, the range of movement of the insertion part is limited, and the field of view of its camera module will also be limited, which hinders medical staff from observing the affected area and affects the treatment effect of the guide sheath and the endoscope.

[0042] The present application provides a guide sheath 100, see Figure 1 The guide sheath 100 may include a sheath body 110 and a telescopic assembly 120 , and the telescopic assembly 120 is disposed on the sheath body 110 .

[0043] See also Figure 2 The sheath body 110 has a receiving cavity 111, which can be used to operate instruments, including but not limited to endoscopes, etc. The following content takes an endoscope as an example. At least part of the insertion portion 200 of the endoscope is located in the receiving cavity 111, and the receiving cavity 111 can provide a certain degree of protection for the insertion portion 200.

[0044] It is understandable that the endoscope here can be a bronchoscope, a pyeloscope, an esophagoscope, a gastroscope, an enteroscope, an otoscope, a rhinoscope, a stomatoscope, a laryngoscope, a colposcope, a laparoscope, an arthroscope, etc., and the embodiment of the present application does not specifically limit the type of endoscope. The insertion portion 200 can be the part of the endoscope used to insert into the object to be detected (such as a human cavity), and the insertion portion 200 can include key components such as a lens, an illuminating device, and an instrument tube, which will not be described in detail here.

[0045] See also Figure 3The telescopic assembly 120 may have a first end 121 and a second end 122 that are relatively far apart. The first end 121 may be the proximal end of the telescopic assembly 120, and the second end 122 may be the distal end of the telescopic assembly 120. The first end 121 is connected to the sheath body 110 and communicates with the accommodating cavity 111, and the insertion portion 200 located in the accommodating cavity 111 can extend into the telescopic assembly 120 through the first end 121. The second end 122 is sealed, and the sealed telescopic assembly 120 can provide a relatively closed space for the insertion portion 200, thereby preventing the insertion portion 200 from directly or indirectly contacting the body tissue of the object being detected, thereby reducing the disinfection requirements of the endoscope.

[0046] The insertion part 200 and the telescopic assembly 120 are arranged correspondingly. For example, the shape of the telescopic assembly 120 is the same as that of the insertion part 200, and the inner diameter of the insertion part 200 is less than or equal to the inner diameter of the telescopic assembly 120, so that the insertion part 200 can be smoothly inserted into the telescopic assembly 120.

[0047] The second end 122 of the telescopic assembly 120 is telescopically arranged relative to the sheath body 110. Figure 4 As shown, the insertion portion 200 of the endoscope is inserted into the accommodating cavity 111 and moves into the telescopic assembly 120 until the endoscope abuts against the second end 122. The medical staff can continue to push the insertion portion 200 to move, and the insertion portion 200 drives the telescopic assembly 120 to extend the telescopic assembly 120 out of the sheath body 110. Figure 5 As shown, the insertion part 200 can also extend out of the sheath body 110 together with the telescopic assembly 120 to prevent the sheath body 110 from affecting the field of view of the camera module of the insertion part 200. The insertion part 200 extends out of the sheath body 110 independently, and the size of the insertion part 200 is smaller than that of the sheath body 110, so that the insertion part 200 can enter a narrower area, thereby improving the use effect of the guide sheath 100.

[0048] In a more specific implementation, please refer to Figure 3 The telescopic assembly 120 may include a light-transmitting seal 123, which may be made of acrylic material, etc., and has good transparency, good structural strength and corrosion resistance, so that the light-transmitting seal 123 is stable and durable during use. The light-transmitting seal 123 is sealed at one end of the telescopic assembly 120 away from the sheath body 110 to form a second end 122. The light-transmitting seal 123 can allow light to pass through while ensuring sealing, thereby ensuring that the endoscope inserted through the telescopic assembly 120 can clearly observe the cavity or the affected area.

[0049] The light-transmitting seal 123 matches the size and shape of the insertion part 200. For example, the inner diameter of the light-transmitting seal 123 can be slightly larger than the outer diameter of the insertion part 200 so that the insertion part 200 can be smoothly inserted and removed. In addition, the light-transmitting seal 123 can support the second end 122 to resist external compression and prevent the second end 122 from deforming and hindering the insertion of the endoscope into the telescopic assembly 120. At the same time, the outer surface of the light-transmitting seal 123 needs to be tightly combined with other parts of the telescopic assembly 120 to form an effective seal to prevent liquid or gas from leaking from the gap.

[0050] In another embodiment, the telescopic component 120 may be integrated to improve the sealing effect and molding efficiency of the telescopic component 120 , which will not be elaborated here.

[0051] Please review Figure 2 , at least part of the telescopic assembly 120 extends into the accommodating cavity 111, and the accommodating cavity 111 and the telescopic assembly 120 are arranged correspondingly. For example, the shape of the telescopic assembly 120 is the same as that of the accommodating cavity 111, and the outer diameter of the telescopic assembly 120 is less than or equal to the inner diameter of the accommodating cavity 111, which is not limited here. The first end 121 is connected to the cavity wall forming the accommodating cavity 111, and the telescopic assembly 120 is used to selectively extend or be accommodated in the accommodating cavity 111. The accommodating cavity 111 provided in this manner can take into account the functions of accommodating and guiding the endoscope, as well as accommodating and communicating the telescopic assembly 120, to ensure that the insertion portion 200 can be inserted into the telescopic assembly 120. Exemplarily, when the telescopic assembly 120 needs to perform its specific function, such as endoscopic observation, detection or treatment, the telescopic assembly 120 can be pushed out of the accommodating cavity 111 by the insertion portion 200 to reach the desired position. When the telescopic component 120 is not in use, it can be received back into the accommodating cavity 111, which can not only protect the telescopic component 120 from damage by the external environment, but also prevent the telescopic component 120 from causing unnecessary interference or obstacles when the sheath body 110 is inserted into the human body cavity.

[0052] In some other cases, the first end 121 of the telescopic component 120 can be fixed to the distal end of the sheath body 110, and then the telescopic component 120 is arranged outside the sheath body 110 and connected to the sheath body 110. This setting can enable the telescopic component 120 to have a larger range of telescopic and bending amounts to adapt to different environments.

[0053] See also Figure 6The telescopic assembly 120 may include a telescopic body 124 and a guide 125, and the opposite ends of the telescopic body 124 may be telescopically arranged. One end of the telescopic body 124 is sealed, and the other end is connected to the guide 125. The telescopic body 124 can effectively prevent external substances (such as air, liquid, etc.) from entering its interior. In addition, this arrangement can ensure the stability and accuracy of the telescopic body 124 during the extension or retraction process, and also enable the telescopic body 124 to perform telescopic movement relative to the guide 125, for example, the telescopic body 124 can be telescopically arranged along the axis of the guide 125.

[0054] Please also read Figure 7 as well as Figure 8 The guide member 125 is embedded in the accommodating cavity 111, and the guide member 125 is connected to the cavity wall forming the accommodating cavity 111. The connection method between the guide member 125 and the cavity wall includes but is not limited to bonding, welding, etc., which will not be described in detail here. The guide member 125 can improve the fixing effect of the telescopic body 124, thereby ensuring the path of the telescopic body 124 during the extension or accommodation process is accurate, so that the telescopic movement of the telescopic body 124 is smoother.

[0055] For example, Figure 8 As shown, the guide member 125 can be configured as an annular structure, and the guide member 125 of the annular structure can abut against the inner wall of the accommodating cavity 111 to improve the coaxiality between the telescopic assembly 120 and the accommodating cavity 111. Furthermore, this arrangement can ensure that the telescopic body 124 is telescopically arranged along the axis of the accommodating cavity 111, and avoid the relative offset of the telescopic body 124 and affect the normal insertion of the insertion part 200. A step 112 can be arranged in the cavity wall of the sheath body 110. The step 112 can be arranged corresponding to the guide member 125, for example, the size and shape of the step 112 and the guide member 125 are substantially the same. The step 112 can increase the connection area between the guide member 125 and the cavity wall, and the step 112 can also provide certain support and positioning for the telescopic assembly 120, thereby improving the safety and reliability of the telescopic assembly 120.

[0056] Furthermore, the step 112 can also be configured as a ring, and the step 112 can enclose a through hole for the insertion of the insertion part 200 only. This setting can enable the insertion part 200 to be inserted stably, and can also provide a certain degree of protection for the guide member 125 to prevent the insertion part 200 from colliding with the guide member 125 during the insertion process, thereby separating the guide member 125 from the cavity wall. The setting of the step 112 can further improve the safety of the telescopic assembly 120.

[0057] The endoscope is prone to shaking or shifting during use, which can affect the accuracy of observation and treatment. Fig. 9 as well as Fig.10The second end 122 is provided with a clamping portion 126, and the clamping portion 126 is used to clamp the operating instrument inserted into the first end 121. When the distal end of the insertion portion 200 extends to the second end 122, the clamping portion 126 can clamp the distal end of the insertion portion 200. The clamping portion 126 can relatively fix the distal end of the insertion portion 200 to the second end 122 of the telescopic assembly 120, and the second end 122 of the telescopic assembly 120 and the insertion portion 200 are relatively static, so as to ensure that the lens of the insertion portion 200 can clearly move the image, and improve the control effect of the insertion portion 200 on the telescopic assembly 120.

[0058] It is understandable that the clamping portion 126 can make the second end 122 of the telescopic component 120 and the insertion portion 200 relatively fixed, and the insertion portion 200 can control the extension and retraction of the second end 122 of the telescopic component 120. When the insertion portion 200 is pulled out, the insertion portion 200 can drive the second end 122 to move toward the accommodating cavity 111, so that the insertion portion 200 can be accommodated in the accommodating cavity 111, which is convenient for controlling the telescopic component 120.

[0059] In a more specific implementation, please refer to Fig.11 as well as Fig.12 The sheath body 110 may also be provided with a limiting portion 113, at least part of which extends into the telescopic assembly 120, and the insertion portion 200 can pass through the limiting portion 113 and extend into the telescopic assembly 120. When the limiting portion 113 and the second end 122 abut against each other, the clamping portion 126 clamps on the outer periphery of the limiting portion 113. The insertion portion 200 abuts against and pushes away from the second end 122, and the clamping portion 126 separates from the limiting portion 113. The clamping portion 126 may include a plurality of sub-clamping portions distributed around the axis of the second end 122, one end of the plurality of sub-clamping portions being fixed to the second end 122, and the other end extending toward the axis. Furthermore, the plurality of sub-clamping portions separated from the limiting portion 113 may be clamped toward the axis of the telescopic assembly 120, that is, the clamping portion 126 clamps on the outer periphery of the insertion portion 200, so as to smoothly clamp the insertion portion 200 through the clamping portion 126, thereby improving the fixing effect of the clamping portion 126.

[0060] In addition, the limiting portion 113 can also have a limiting function, and the limiting portion 113 can be arranged between the step 112 and the distal end of the sheath body 110. When the telescopic assembly 120 is retracted, the limiting portion 113 can prevent the telescopic assembly 120 from over-retracting, and protect the structure of the telescopic assembly 120 from being damaged. Moreover, the limiting portion 113 can separate the clamping portion 126 and the insertion portion 200 of the endoscope by preventing the second end 122 from moving, so as to ensure that the insertion portion 200 can be smoothly pulled out.

[0061] In some other cases, the second end 122 may also be provided with a magnetic element, a buckle, etc., so that the second end 122 and the distal end of the insertion portion 200 are connected to each other, which will not be elaborated here.

[0062] In this example, please refer to Figure 2 The sheath body 110 may also have an instrument channel 114, and the instrument channel 114 is used to insert the treatment instrument 300. The treatment instrument 300 may be a laser, a biopsy forceps, etc., which is not limited in this embodiment, but for the convenience of writing, the following content is described using a laser as an example. The instrument channel 114 can provide accommodation and guidance for the laser and its rear end wiring harness to prevent the laser from interfering with the normal operation of the sheath body 110.

[0063] Please review Figure 3 The second end 122 may be provided with a connection portion 127, which may be a protrusion or a groove located on the circumference of the second end 122. The present embodiment does not limit the specific structure of the connection portion 127. The connection portion 127 is located at the second end 122 of the telescopic assembly 120, that is, the connection portion 127 can be telescopically arranged relative to the sheath body 110. Furthermore, the connection portion 127 can be used to fix the distal end of the treatment instrument 300, and the treatment instrument 300 fixed to the connection portion 127 can also be telescopically arranged relative to the sheath body 110.

[0064] Exemplarily, the telescopic assembly 120 is used to insert the insertion part 200 of the endoscope, and the insertion part 200 may have a lens for observation, and an active bending section with active bending capability, etc. The medical staff can control the insertion part 200 to perform a bending operation through the image transmitted by the lens of the endoscope to change the relative orientation of the laser so that the laser can accurately break up the stone, thereby improving the safety and efficiency of the use of the guide sheath 100. It is understandable that at least part of the telescopic assembly 120 is located in the accommodating cavity 111, and the telescopic assembly 120 can also drive the sheath body 110 to bend, so that the sheath body 110 can adapt to multiple cavities of the human body and improve the passability of the sheath body 110.

[0065] Preferably, see Fig.13, the instrument channel 114 can also be configured with a redundant space 115, which can provide space for the wiring harness at the rear end of the treatment instrument 300, so that the wiring harness can be at least partially redundantly set. For example, the treatment instrument 300 can be a laser, and the wiring harness can be an optical fiber, which can efficiently transmit the laser to the laser to achieve precise cutting or crushing. Because the treatment instrument 300 can be telescopic or bent together with the telescopic component 120, compared with other parts of the instrument channel 114, the optical fiber can be redundantly set in the redundant space 115. The redundant setting can avoid affecting the normal activity of the treatment instrument 300 due to the length of the optical fiber, thereby improving the safety of the use of the treatment instrument 300. In addition, through the redundant setting, the proximal end of the optical fiber can be fixed on the sheath tube body 110, avoiding interference caused by frequent sliding of the optical fiber in the instrument channel 114, thereby improving the use effect of the guide sheath 100.

[0066] It is understandable that the redundant space 115 may be configured in different shapes and sizes depending on the treatment device 300 and its wiring harness. For example, when the wiring harness may be an optical fiber, the optical fiber should not be bent significantly. The redundant space 115 may be configured in a long strip structure so that the optical fiber has a smaller bending amplitude and a larger redundancy.

[0067] In this example, see Fig.14 , at least part of the accommodating cavity 111 where the telescopic assembly 120 is located is interconnected with the instrument channel 114, and the connecting portion 127 is used to selectively enter or leave the instrument channel 114. The accommodating cavity 111 can be connected to the instrument channel 114 on the cavity wall. Exemplarily, the connecting portion 127 can be a protruding structure in the telescopic assembly 120 that connects the treatment instrument 300. This setting can allow the connecting portion 127 to selectively enter or leave the sheath body 110 as needed. Specifically, when the connecting portion 127 needs to enter the instrument channel 114, it can smoothly move inside and outside the sheath body 110 through the opened cavity wall channel. This setting improves the telescopic range of the telescopic assembly 120, and the second end 122 of the telescopic assembly 120 is no longer restricted outside the sheath body 110, but can move in a larger space. It improves the accommodation and range of motion of the telescopic assembly 120, avoids the problem of the connection portion 127 being restricted, and thus improves the efficiency and performance of the entire assembly.

[0068] When used to treat stones, in order to balance the internal and external pressures of the affected part and flush and discharge the substances to be discharged, for example, the substances to be discharged may be crushed stones, so the guide sheath 100 has the need to inject or discharge the medium. Fig.15The instrument channel 114 may include an instrument space and a flow space. The instrument space is used to accommodate and guide these instruments to the target position, and the flow space is used to flow the medium into the distal end of the sheath. The medium includes but is not limited to physiological saline, contrast agent, etc. The instrument channel 114 takes into account the functions of accommodating instruments and injecting media, and has a higher degree of integration and a small volume.

[0069] In addition, the guide sheath 100 may include an outflow channel 116, which can discharge the medium and the substance to be discharged, and the outflow channel 116 is spaced apart from the accommodating cavity 111. The outflow channel 116 can operate independently of the accommodating cavity 111, avoiding the medium from affecting and contaminating the insertion portion 200 in the accommodating cavity 111, thereby improving the protection level of the endoscope. In addition, because the instrument channel 114 has a high degree of integration and a small volume, it leaves a large amount of space for the outflow channel 116 to increase the cross-sectional area of ​​the outflow channel 116 and avoid the substance to be discharged from clogging the outflow channel 116.

[0070] Exemplarily, the medium is injected through the flow space, and the medium flows to the far end of the instrument channel 114. The medium changes the internal and external pressures of the affected part, and supports a certain treatment space in the affected part, so that medical staff can operate the instrument for treatment. The outflow channel 116 can provide a negative pressure space, and the medium can also be discharged from the body through the outflow channel 116, and the substances to be discharged will also be discharged along with it.

[0071] In either case, see Fig.16 , the guide sheath 100 may include an inflow channel 117 and an outflow channel 116, the instrument channel 114 is spaced apart from the inflow channel 117 and the outflow channel 116, and the inflow channel 117 and the outflow channel 116 extend to the distal end of the guide sheath 100. The inflow channel 117 and the outflow channel 116 can operate independently of the accommodating cavity 111, avoiding the medium discharged from the inflow channel 117 and the outflow channel 116 from affecting and contaminating the insertion portion 200 in the accommodating cavity 111, thereby improving the protection level of the endoscope. Exemplarily, a medium is injected through the inflow channel 117, wherein the medium includes but is not limited to physiological saline, contrast agent, etc. The medium flows to the distal end of the inflow channel 117. The outflow channel 116 can provide a negative pressure space, and the medium can also be discharged from the body through the outflow channel 116, and the substances to be discharged will also be discharged together. The inflow channel 117 and the outflow channel 116 can provide a clear flow path for the medium, improve the flow efficiency of the medium, and improve the safety of the use of the guide sheath 100.

[0072] In order to achieve the above-mentioned purpose and other related purposes, the present application provides a sheath tube assembly 1, see Fig.17 The sheath tube assembly 1 includes the aforementioned guide sheath 100. In this way, the sheath tube assembly 1 has the beneficial effects of any of the aforementioned solutions, which will not be described in detail here.

[0073] The technical solution adopted by the present invention can achieve the following beneficial effects: the sheath body 110 is inserted into the body of the doctor or patient, such as the kidney of the doctor or patient. The insertion part 200 of the endoscope is inserted into the accommodating cavity 111 and moves into the telescopic assembly 120 until the endoscope abuts against the second end 122. The medical staff can continue to push the insertion part 200 to move, and the insertion part 200 drives the telescopic assembly 120 to make the telescopic assembly 120 extend out of the sheath body 110. The insertion part 200 can also extend out of the sheath body 110 together with the telescopic assembly 120 to avoid the sheath body 110 affecting the field of view of the camera module of the insertion part 200. The insertion part 200 independently extends out of the sheath body 110, and the size of the insertion part 200 is smaller than that of the sheath body 110, so that the insertion part 200 can enter a narrower area, thereby improving the use effect of the guide sheath 100. During this period, the sealed telescopic assembly 120 can provide a relatively closed space for the insertion portion 200, thereby preventing the insertion portion 200 from directly or indirectly contacting the body tissue of the subject being detected, thereby reducing the disinfection requirements of the endoscope.

[0074] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including 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 sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0075] 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 a reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

[0076] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A guide sheath, characterized in that: include: A sheath body, wherein the sheath body has a receiving cavity and an instrument channel, wherein the instrument channel is used for inserting a treatment instrument; as well as, A telescopic component, the telescopic component has a first end and a second end that are relatively far apart, the first end is connected to the sheath body and communicates with the accommodating cavity, the second end is sealed and telescopically arranged relative to the sheath body, and the second end is provided with a connecting portion, which is used to fix the distal end of the disposal instrument.

2. The guide sheath according to claim 1, characterized in that: At least a portion of the telescopic component extends into the accommodating cavity, the first end is connected to a cavity wall forming the accommodating cavity, and the telescopic component is used to selectively extend or be accommodated in the accommodating cavity.

3. The guide sheath according to claim 2, characterized in that: The telescopic assembly includes a telescopic body and a guide member, one end of the telescopic body is sealed, and the other end is connected to the guide member, the guide member is embedded in the accommodating cavity and interconnected with the cavity wall forming the accommodating cavity.

4. The guide sheath according to claim 2, characterized in that: The second end is provided with a clamping portion, and the clamping portion is used to clamp an operating instrument extending into the first end.

5. The guide sheath according to claim 4, characterized in that: The sheath tube body is further provided with a limiting portion, at least a portion of which extends into the telescopic assembly, and when the limiting portion and the second end abut against each other, the clamping portion is clamped on the outer periphery of the limiting portion.

6. The guide sheath according to claim 1, characterized in that: The instrument channel is also configured with redundant space; And / or, at least a portion of the accommodating cavity where the telescopic assembly is located is communicated with the instrument channel, and the connecting portion is used to selectively enter or leave the instrument channel.

7. The introducer sheath according to claim 1, characterized in that: The guide sheath comprises an outflow channel, the outflow channel is spaced apart from the accommodating cavity, the instrument channel comprises an instrument space and a flow space, the flow space is used to flow the medium into the distal end of the sheath tube; Alternatively, the guide sheath comprises an inflow channel and an outflow channel, the instrument channel is spaced apart from the inflow channel and the outflow channel, and the inflow channel and the outflow channel extend to the distal end of the guide sheath.

8. The guide sheath according to any one of claims 1 to 7, characterized in that: The telescopic assembly further comprises a light-transmitting seal, which is sealingly arranged at one end of the telescopic assembly away from the sheath tube body to form the second end.

9. A sheath tube assembly, characterized in that: Comprising the guide sheath as described in any one of claims 1-8.

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