Ureteral sheath and surgical equipment

Abstract

The present invention relates to the field of medical device technology, and specifically discloses a ureteral sheath and surgical equipment, wherein the ureteral sheath comprises a sheath body, wherein the sheath body is provided with a surgical channel, wherein the surgical channel is used to insert an insertion part, wherein a first magnetic component is provided in the sheath body, and a second magnetic component is provided in the insertion part, wherein the first magnetic component and the second magnetic component generate a magnetic force so that the insertion part is attached to the inner wall of the surgical channel to form a negative pressure attraction area; in the above scheme, the insertion part can be offset or attached to the inner wall of the sheath body through the magnetic attraction cooperation between the first magnetic component and the second magnetic component of the insertion part inserted into the surgical channel, and the radial dimension of the negative pressure attraction area formed at this time is relatively large, which is conducive to the smooth discharge of waste such as gravel.

Description

Technical Field

[0001] The present invention relates to the technical field of endoscopes, and in particular to a ureteral sheath and surgical equipment. Background Art

[0002] Ureteral sheaths are used in urological surgery. Before clinical urological surgery, a ureteral sheath must be inserted into the ureter to establish a surgical channel. During the operation, an endoscope, laser fiber, stone removal instrument or operating cable is introduced through the surgical channel.

[0003] In the related art, the ureteral sheath usually has a perfusion function. The perfusion function of the ureteral sheath not only makes the surgical field of view clearer and provides good operating conditions for doctors, but also helps to flush out waste generated by the operation, such as gravel, blood clots, and purulent flocs, and promotes the smooth progress of the operation. The flushed waste, such as gravel, blood clots, and purulent flocs, can be discharged through the ureteral sheath by negative pressure suction. However, when the ureteral sheath in the related art is subjected to negative pressure suction, gravel often gets stuck in the ureteral sheath, that is, the permeability of the ureteral sheath is poor, which affects the normal progress of the surgical operation and increases the difficulty and risk of the operation. Summary of the invention

[0004] The invention discloses a ureteral sheath and a surgical device, so as to solve the technical problem in the related art that the ureteral sheath has poor lithotripsy during negative pressure suction.

[0005] In order to solve the above problems, the present invention adopts the following technical solutions:

[0006] The present application provides a ureteral sheath, which includes a sheath body, the sheath body being provided with a surgical channel, the surgical channel being used to insert an insertion part, a first magnetic part being provided in the sheath body, and a second magnetic part being provided in the insertion part, the first magnetic part and the second magnetic part generating a magnetic force so that the insertion part adheres to the inner wall of the surgical channel to form a negative pressure suction area.

[0007] Furthermore, the ureteral sheath also includes a diaphragm, which is arranged in the surgical channel to separate the surgical channel into an instrument channel and an irrigation channel.

[0008] Further, along the circumferential direction of the sheath body, the diaphragm corresponds to the first magnetic member; or, along the circumferential direction of the sheath body, the diaphragm is offset from the first magnetic member, and the diaphragm is adjacent to the first magnetic member.

[0009] Furthermore, the diaphragm has a closed state and an open state. In the closed state, the diaphragm is attached to the inner wall of the sheath body. The diaphragm is configured to switch from the closed state to the open state when the perfusion channel is filled with perfusion liquid.

[0010] Further, the diaphragm includes a first diaphragm segment and a second diaphragm segment, and the perfusion channel includes a first perfusion channel formed by the first diaphragm segment and the inner wall of the sheath body, and a second perfusion channel formed by the second diaphragm segment and the inner wall of the sheath body, wherein, along the circumferential direction of the sheath body, the first diaphragm segment is located between the first magnetic member and the second diaphragm segment, and a portion of the first diaphragm segment overlaps a portion of the second diaphragm segment.

[0011] Further, along the radial direction of the sheath body, a portion of the first diaphragm segment that overlaps with the second diaphragm segment is located between the second diaphragm segment and an inner wall of the sheath body.

[0012] Furthermore, the second diaphragm segment includes a first part, a second part, a third part and a fourth part which are connected in sequence, wherein the first part is attached to the inner wall of the sheath body, the second part overlaps with the first diaphragm segment and is connected and fixed to the first diaphragm segment, and the third part is used to fit with the insertion part.

[0013] Furthermore, the thicknesses of the first part, the second part and the third part are all smaller than the thickness of the fourth part.

[0014] Furthermore, in the closed state, the fourth portion is in an arc-shaped structure that is recessed toward the inner wall of the sheath body.

[0015] In a second aspect, the present application also provides a surgical device, comprising an insertion part and the aforementioned ureteral sheath, wherein the insertion part is provided with a second magnetic member, and the second magnetic member is configured to be magnetically attracted to the first magnetic member when the insertion part is inserted into the surgical channel, so that the insertion part is attached to the inner wall of the surgical channel.

[0016] The technical solution adopted by the present invention can achieve the following beneficial effects:

[0017] The ureteral sheath of the present application has a first magnetic component disposed in the sheath body. When the insertion portion is inserted into the sheath body, the first magnetic component can be magnetically coupled with the second magnetic component in the insertion portion, so that the insertion portion can fit tightly on the same side of the sheath body. At this time, the sheath body forms a negative pressure suction area on the other side of the insertion portion, and the radial space that can be occupied by the negative pressure suction area at this time is the largest. When negative pressure is used to absorb waste such as gravel in the human body, this distribution is conducive to the smooth discharge of waste such as gravel. In other words, this method can improve the passability of waste such as gravel, ensure the normal progress of surgical operations, and reduce the difficulty and risk of surgery. 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 It is one of the structural schematic diagrams of the ureteral sheath of the embodiment of the present application;

[0020] Figure 2 is one of the cross-sectional schematic diagrams of the ureteral sheath of an embodiment of the present application when the diaphragm is in a closed state;

[0021] Figure 3 is one of the cross-sectional schematic diagrams of the ureteral sheath of the embodiment of the present application when the diaphragm is in an open state;

[0022] Figure 4 This is the second cross-sectional schematic diagram of the ureteral sheath in the embodiment of the present application when the diaphragm is in an open state;

[0023] Figure 5 This is the second cross-sectional schematic diagram of the ureteral sheath in the embodiment of the present application when the diaphragm is in a closed state;

[0024] Figure 6 yes Figure 5 A local enlarged schematic diagram of the middle A;

[0025] Figure 7 This is the third schematic cross-sectional view of the ureteral sheath of the embodiment of the present application when the diaphragm is in an open state;

[0026] Figure 8 This is the fourth schematic cross-sectional view of the ureteral sheath of the embodiment of the present application when the diaphragm is in an open state.

[0027] In the figure:

[0028] 20, insertion part; 20a, second magnetic part; 100, sheath body; 110, surgical channel; 111, instrument channel; 112, perfusion channel; 112a, first perfusion channel; 112b, second perfusion channel; 120, first magnetic part; 200, diaphragm; 210, first diaphragm segment; 211, first segment; 212, second segment; 220, second diaphragm segment; 221, first part; 222, second part; 223, third part; 224, fourth part; 225, tendon. DETAILED DESCRIPTION

[0029] 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.

[0030] 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.

[0031] The following is combined with Figures 1 to 8 , the ureteral sheath and insertion device provided in the embodiments of the present application are described in detail through specific embodiments and their application scenarios.

[0032] See also Figure 1 , Figure 2 and Figure 3 The embodiment of the present application discloses a ureteral sheath, and the disclosed ureteral sheath includes a sheath body 100, wherein the sheath body 100 is a basic component of the ureteral sheath, and the sheath body 100 is a tubular structure as a whole, and can be placed in a patient's body. Specifically, please refer to Figure 2 The sheath body 100 has a surgical channel 110. Exemplarily, the surgical channel 110 penetrates the sheath body 100 along the extension direction of the sheath body 100. The insertion portion 20 of the endoscope can be extended into the patient's body through the surgical channel 110, that is, the surgical channel 110 is used to accommodate the insertion portion 20 of the endoscope.

[0033] In the embodiment of the present application, a first magnetic member 120 is provided in the sheath body 100, and a second magnetic member 20a is provided in the insertion part 20. The first magnetic member 120 and the second magnetic member 20a generate a magnetic force, so that the insertion part 20 is attached to the inner wall of the surgical channel 110. Exemplarily, the first magnetic member 120 can be provided in the sheath body 100 by embedding or bonding, or a layer of magnetic coating is applied on the outer wall or inner wall of the sheath body 100. The magnetic coating can be a mixture of magnetic powder and adhesive, which is applied to the inner wall or outer wall of the sheath body 100 by spraying, brushing or dipping to form the first magnetic member 120; similarly, the second magnetic member 20a can be provided in the insertion part 20 by embedding or bonding, or a layer of magnetic coating is applied on the outer wall or inner wall of the insertion part 20 to form the second magnetic member 20a.

[0034] In the embodiment of the present application, the magnetic force generated by the first magnetic member 120 and the second magnetic member 20a can be a magnetic attraction force or a magnetic repulsion force. When the magnetic force is a magnetic attraction force, the insertion portion 20a is attached to the side of the sheath body 100 where the first magnetic member 120 is provided. When the magnetic force is a magnetic repulsion force, the insertion portion 20a is attached to the side of the sheath body 100 opposite to the first magnetic member 120. The embodiment of the present application does not impose specific restrictions on this. In some embodiments disclosed in the present application, one of the first magnetic member 120 and the second magnetic member 20a can be a magnet, and the other can be a magnetic attraction member that produces a magnetic effect with a magnet, specifically a magnet, or other coatings that attract each other with a magnet.

[0035] Based on the magnetic force generated by the first magnetic part 120 and the second magnetic part 20a, the insertion part 20 located in the sheath body 100 can be tightly fitted on the same side of the sheath body 100. At this time, the surgical channel 110 forms a larger gap area on the other side of the sheath body 100. When the ureteral sheath is used for negative pressure suction, the gap area can be used as a negative pressure suction area. That is to say, waste such as gravel in the human body can be discharged outward through the negative pressure suction area, and the radial space occupied by the negative pressure suction area at this time is the largest, which can improve the passability of waste such as gravel, ensure the normal progress of the surgical operation, and reduce the difficulty and risk of the operation.

[0036] In some embodiments of this application, please continue to refer to Figure 2 and Figure 3The ureteral sheath may further include a diaphragm 200, which is disposed in the surgical channel 110 to separate the surgical channel 110 into an instrument channel 111 and an irrigation channel 112, wherein a radial dimension of the instrument channel 111 is greater than a radial dimension of the irrigation channel 112, and when the insertion portion 20 is inserted into the sheath body 100, the insertion portion 20 is located in the instrument channel 111, and the aforementioned negative pressure suction area constitutes part of the instrument channel 111.

[0037] It should be noted that, in the embodiment of the present application, the diaphragm 200 can be an annular structure or a sheet structure made of a flexible elastic material. When the diaphragm 200 is a circumferentially closed annular structure, part of the diaphragm 200 can be attached to the inner wall of the sheath body 100 by gluing, welding, etc. In this case, it can be considered that the diaphragm 200 and the sheath body 100 are enclosed to form a perfusion channel 112; when the diaphragm 200 is a sheet structure, the diaphragm 200 can be connected and fixed to the inner wall of the sheath body 100 at both ends of its circumference by gluing, welding, etc. In this case, it can also be considered that the diaphragm 200 and the sheath body 100 are enclosed to form a perfusion channel 112, the instrument channel 111 is formed on one side of the diaphragm 200, and the perfusion channel 112 is formed on the other side of the diaphragm 200.

[0038] In the embodiment of the present application, the diaphragm 200 has a closed state and an open state. In the closed state, that is, when there is no perfusion fluid in the perfusion channel 112, the diaphragm 200 is attached to the inner wall of the sheath body 100; the diaphragm 200 is configured to be squeezed and deformed to open when the perfusion channel 112 is filled with perfusion fluid, and the diaphragm 200 switches from a closed state to an open state. In the open state, the diaphragm 200 is separated from the inner wall of the sheath body 100 and forms a larger flow aperture to ensure that the perfusion channel 112 has sufficient perfusion flow during perfusion operations. Perfusion through the perfusion channel 112 can make the field of view clear during surgical operations and provide good operating conditions for doctors. At the same time, waste materials such as gravel, blood clots and purulent flocs flushed out by perfusion can be discharged outward through the aforementioned negative pressure suction area, thereby ensuring the smooth progress of the operation.

[0039] In some embodiments of this application, see Figure 2 and Figure 3 Along the circumferential direction of the sheath body 100, the diaphragm 200 corresponds to the first magnetic component 120, that is, the circumferential distribution position of the first magnetic component 120 on the sheath body 100 is also the circumferential distribution position of the diaphragm 200 on the sheath body 100, the first magnetic component 120 and the diaphragm 200 are distributed in the same radial direction of the sheath body 100, and the diaphragm 200 is located between the first magnetic component 120 and the insertion portion 20.

[0040] In the embodiment of the present application, for the convenience of writing, when the insertion part 20 is attached to the inner wall of the sheath body 100 by the magnetic attraction force, it is defined that the insertion part 20 is distributed in the first radial direction of the sheath body 100. The inventor found in the research process that when the diaphragm 200 is located between the first magnetic member 120 and the insertion part 20, the diaphragm 200 and the insertion part 20 are both distributed in the first radial direction of the sheath body 100. When the diaphragm 200 is in an open state, based on the expansion of the channel size of the perfusion channel 112 in the first radial direction, the radial space jointly occupied by the perfusion channel 112 and the insertion part 20 in the first radial direction is large, thereby compressing the radial size of the aforementioned negative pressure suction area, which is not conducive to the discharge of large-sized gravel and other waste from the negative pressure suction area.

[0041] The inventors also found during the research that when the insertion portion 20 is close to the inner wall of the sheath body 100, a gap area with a gradually changing width is formed between the insertion portion 20 and the inner wall of the sheath body 100 on both sides of the first radial direction. Because the radial dimension of the gap is smaller than the radial dimension of the negative pressure suction area, waste such as gravel is easy to pass through the negative pressure suction area with a larger radial dimension, and the probability of passing through the gap area is low. For ease of understanding, the negative pressure suction area can be considered as the gap area of ​​the instrument channel 111 distributed in the first radial direction, and the gap area can be considered as the area of ​​the instrument channel 111 distributed on both sides of the first radial direction.

[0042] Based on this situation, in some embodiments of the present application, please refer to Figure 4 , Figure 5 and Figure 6 , along the circumferential direction of the sheath body 100, the diaphragm 200 is offset from the first magnetic member 120, and the diaphragm 200 is arranged adjacent to the first magnetic member 120. In this case, the diaphragm 200 is arranged in the aforementioned gap area; under such arrangement, on the one hand, the perfusion channel 112 formed by the diaphragm 200 can enable the ureteral sheath to have a perfusion function, and the operator can flush out gravel, blood clots and purulent flocs through the perfusion channel 112 formed by the diaphragm 200; on the other hand, the diaphragm 200 is arranged in the gap area on one side of the insertion part 20 in the first radial direction, and will not occupy the negative pressure suction area with a larger reduced radial space size, thereby ensuring the passability of waste such as gravel when passing through the negative pressure suction area.

[0043] In some embodiments of this application, see Figure 2 and Figure 3 The diaphragm 200 may be an integrated structure, and the integrated diaphragm 200 is connected to the inner wall of the sheath body 100 to form an independent perfusion channel 112 .

[0044] In some embodiments of the present application, the diaphragm 200 may also be a split structure. Figure 4 , Figure 5 , Figure 6 and Figure 7 The diaphragm 200 may include a first diaphragm segment 210 and a second diaphragm segment 220 , and the first diaphragm segment 210 and the second diaphragm segment 220 are respectively connected to the sheath body 100 .

[0045] See also Figure 4 or Figure 7 The perfusion channel 112 includes a first perfusion channel 112a formed by the first diaphragm segment 210 and the inner wall of the sheath body 100, and a second perfusion channel 112b formed by the second diaphragm segment 220 and the inner wall of the sheath body 100. Along the circumferential direction of the sheath body 100, the first diaphragm segment 210 is located between the first magnetic member 120 and the second diaphragm segment 220, so that the formed first perfusion channel 112a is closer to the fitting position of the insertion portion 20 and the sheath body 100 than the second perfusion channel 112b.

[0046] Based on the above technical solution, by setting the diaphragm 200 as a split structure to form a first perfusion channel 112a and a second perfusion channel 112b, the gap interval of the surgical channel 110 distributed on one side of the insertion part 20 can be fully utilized. When the perfusion channel 112 does not occupy the negative pressure suction area, it can be ensured that the perfusion channel 112 has a larger perfusion diameter. The larger perfusion diameter can produce a stronger flushing effect, which helps to flush the crushed stone powder or small pieces of stones out of the body faster, improve the stone clearance rate, reduce the residual stones in the ureter, and improve the safety of the operation.

[0047] In the embodiment of the present application, along the circumferential direction of the sheath body 100, a portion of the first diaphragm segment 210 overlaps with a portion of the second diaphragm segment 220, and along the radial direction of the sheath body 100, the portion of the first diaphragm segment 210 that overlaps with the second diaphragm segment 220 is located between the second diaphragm segment 220 and the inner wall of the sheath body 100.

[0048] Please see 4~ Figure 7 The first diaphragm segment 210 may include a first segment 211 and a second segment 212. The first segment 211 may be attached to the inner wall of the sheath body 100. In a closed state, the second segment 212 is attached to the first segment 211. When the perfusion liquid is flushed into the first perfusion channel 112a, the perfusion liquid props up the second segment 212 and separates it from the first segment 211, thereby making the first perfusion channel 112a have a certain radial dimension for the perfusion liquid to flow through.

[0049] In the above scheme, the first diaphragm segment 210 adopts a two-section structure, in which the first segment 211 is attached to the inner wall of the sheath body 100, and can provide a stable supporting connection basis for the expansion and deformation of the second segment 212. When the first perfusion channel 112a is filled with perfusion fluid, the cross-sectional shape of the first perfusion channel 112a is spindle-shaped or spindle-like. In this way, the spindle-shaped or spindle-like first perfusion channel 112a can be closer to the position where the insertion part 20 and the sheath body 100 are in contact, thereby making full use of the aforementioned gap area.

[0050] In a further technical solution, a pre-bend is provided at the junction of the first section 211 and the second section 212. The pre-bend design can enhance the deformation stability of the first diaphragm section 210, guide the perfusion liquid to flow smoothly in a specific path, reduce the formation of eddies and turbulence, and reduce the resistance to perfusion, thereby improving the efficiency and uniformity of perfusion.

[0051] In the examples of this application, please continue to refer to Figure 4~Figure 7 The second diaphragm segment 220 includes a first portion 221, a second portion 222, a third portion 223 and a fourth portion 224 which are connected in sequence, wherein the first portion 221 is attached to the inner wall of the sheath body 100, and the second portion 222 overlaps with the first diaphragm segment 210 and is connected and fixed to the first diaphragm segment 210. Exemplarily, the second portion 222 can be connected and fixed to the first diaphragm segment 210 by gluing, and the third portion 223 and the fourth portion 224 are connected and enclosed in sequence to form the second perfusion channel 112b.

[0052] As can be seen from the above, when the first perfusion channel 112a is filled with perfusion liquid, the cross section of the first diaphragm segment 210 maintains a relatively stable spindle or spindle-like shape. Based on the second portion 222 of the second diaphragm segment 220 being connected and fixed to the second portion 212 of the first diaphragm segment 210, when the second perfusion channel 112b is filled with perfusion liquid, the second portion 222 can pull and restrain the entire second diaphragm segment 220 to avoid excessive uncontrollable deformation of the second diaphragm segment 220, so that the second diaphragm segment 220 in the open state also has deformation stability, thereby guiding the perfusion liquid to flow smoothly in the second perfusion channel 112b, reducing the formation of eddies and turbulence, and reducing the resistance of perfusion, thereby improving the efficiency and uniformity of perfusion.

[0053] At the same time, based on the pulling and restraining effect of the second section 212 on the second diaphragm section 220, it is also possible to prevent the second diaphragm section 220 from being excessively deformed and pushing the insertion part 20 to move. When the insertion part 20 is pushed and moved, it is very easy to release the magnetic connection with the sheath body 100, and in the case of movement, it occupies the radial dimension of the aforementioned negative pressure attraction area, which is not conducive to the smooth discharge of larger-sized gravel and other waste. By connecting and fixing the second section 212 to the second part 222, it is possible to avoid excessive deformation of the second diaphragm section 220, and it is possible to ensure that the radial dimension of the negative pressure attraction area is adapted to the suction and discharge of larger-sized gravel, and it is possible to ensure that the second perfusion channel 112b has a larger perfusion diameter.

[0054] For further technical solutions, see Figure 5 , Figure 6 and Figure 7 The thickness of the fourth portion 224 is greater than that of the first portion 221, the second portion 222 and the third portion 223, which means that the second diaphragm segment 220 has higher structural strength and rigidity at the fourth portion 224, and has a stronger ability to resist deformation. When the perfusion liquid is poured into the second perfusion channel 112b, although the entire second diaphragm segment 220 will switch from a closed state to an open state, the fourth portion 224 will not be as easily deformed as the second portion 222 and the third portion 223, resulting in the second diaphragm segment 220 presenting a "convex front and slow back" shape when opened. The "convex front and slow back" here means that the perfusion liquid is easily filled between the second portion 222 and the third portion 223, causing the second portion 222 and the third portion 223 to deform first, and the fourth portion 224 to deform last. By thickening the fourth portion 224 to enhance its ability to resist deformation, it is possible to avoid excessive deformation of the fourth portion 224 and encroachment on the negative pressure suction area, thereby preventing the second diaphragm segment 220 from interfering with the discharge of waste such as gravel.

[0055] It can be understood that, based on the fact that the thickness of the first portion 221 and the third portion 223 are both smaller than the thickness of the fourth portion 224, that is, a weak portion with a smaller thickness is formed at the edge of the fourth portion 224, when the perfusion liquid is flushed into the second perfusion channel 112b, the fourth portion 224 can be flushed open to ensure that the second perfusion channel 112b has a larger radial dimension and the perfusion diameter of the second perfusion channel 112b is ensured. In other words, although the fourth portion 224 is designed to be thickened, it does not affect the switching of the second perfusion channel 112b from a closed state to an open state.

[0056] In a further technical solution, in the open state, the third part 223 is in an arc-shaped structure recessed toward the inner wall of the sheath body 100. In a preferred embodiment, the curvature of the third part is the same as the curvature of the insertion part. In this way, the third part 223 can fit close to the outer wall of the insertion part 20 and avoid the insertion part 20, thereby further expanding the perfusion diameter of the second perfusion channel 112b without interfering with the insertion part 20 in the magnetic state.

[0057] In some embodiments of the present application, in the closed state, the fourth portion 224 is recessed into the inner wall of the sheath body 100 in an arc-shaped structure. In a preferred embodiment, the fourth portion 224 has the same curvature as the sheath body 100. In this way, in the closed state, the fourth portion 224 has a better fit with the inner wall of the sheath body 100, so that when the operator inserts the treatment instrument for surgical operation, the treatment instrument is not easy to interfere with the second diaphragm segment 220.

[0058] During the research, the inventors found that since the aforementioned second diaphragm segment 220 adopts a four-segment structure, when forming the second perfusion channel 112b, the stability of the second perfusion channel 112b is still poor, that is, the second perfusion channel 112b is prone to collapse and the channel size becomes smaller. Based on this situation, in some embodiments of the present application, the second diaphragm segment 220 may further include two ribs 225, wherein one rib 225 connects the head end of the second part 222 and the end of the third part 223, and the other rib 225 connects the head end of the fourth part 224 and the end of the first part 221, and the two ribs 225 may be bonded and fixed by gluing, so that the second perfusion channel 112b is divided into two sub-channels with a triangular cross-section through the partition effect of the two ribs 225, and based on the structural stability of the triangle, the two ribs 225 can play a certain internal supporting role for the second perfusion channel 112b, so that the second perfusion channel 112b can be as close to the insertion part 20 as possible to occupy more gap area, while ensuring the structural stability of the second perfusion channel 112b in the open state.

[0059] Of course, in other embodiments of the present application, in order to make the two ribs 225 separate the second perfusion channel 112b into two triangular sub-channels, one of the ribs 225 can also connect the head end of the first part 221 and the end of the second part 222, and the other rib 225 connects the head end of the third part 223 and the end of the fourth part 224. The embodiments of the present application do not impose specific restrictions on this, as long as the structural stability of the second perfusion channel 112b in the open state can be achieved.

[0060] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out 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 reverse 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.

[0061] 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 ureteral sheath, characterized in that: The invention comprises a sheath body (100), wherein the sheath body (100) is provided with a surgical channel (110), wherein the surgical channel (110) is used to insert an insertion portion (20), wherein a first magnetic component (120) is provided in the sheath body (100), and wherein a second magnetic component (20a) is provided in the insertion portion (20); the first magnetic component (120) and the second magnetic component (20a) generate a magnetic force, so that the insertion portion (20) is attached to one side of the inner wall of the surgical channel (110), thereby forming a negative pressure suction area in the surgical channel (110) relative to the other side of the insertion portion (20).

2. The ureteral sheath according to claim 1, characterized in that: It also includes a diaphragm (200), wherein the diaphragm (200) is disposed in the surgical channel (110) to separate the surgical channel (110) into an instrument channel (111) and an irrigation channel (112).

3. The ureteral sheath according to claim 2, characterized in that: Along the circumferential direction of the sheath body (100), the diaphragm (200) corresponds to the first magnetic member (120); or, along the circumferential direction of the sheath body (100), the diaphragm (200) is offset from the first magnetic member (120), and the diaphragm (200) is adjacent to the first magnetic member (120).

4. The ureteral sheath according to claim 3, characterized in that: The diaphragm (200) has a closed state and an open state. In the closed state, the diaphragm (200) is attached to the inner wall of the sheath body (100). The diaphragm (200) is configured to switch from the closed state to the open state when the perfusion channel (112) is filled with perfusion liquid.

5. The ureteral sheath according to claim 4, characterized in that: The diaphragm (200) comprises a first diaphragm segment (210) and a second diaphragm segment (220); the perfusion channel (112) comprises a first perfusion channel (112a) formed by the first diaphragm segment (210) and the inner wall of the sheath body (100), and a second perfusion channel (112b) formed by the second diaphragm segment (220) and the inner wall of the sheath body (100); wherein: Along the circumferential direction of the sheath body (100), the first diaphragm segment (210) is located between the first magnetic component (120) and the second diaphragm segment (220), and a portion of the first diaphragm segment (210) overlaps a portion of the second diaphragm segment (220).

6. The ureteral sheath according to claim 5, characterized in that: Along the radial direction of the sheath body (100), the portion of the first diaphragm segment (210) that overlaps with the second diaphragm segment (220) is located between the second diaphragm segment (220) and the inner wall of the sheath body (100).

7. The ureteral sheath according to claim 5, characterized in that: The second diaphragm segment (220) comprises a first part (221), a second part (222), a third part (223) and a fourth part (224) which are connected in sequence; wherein: The first part (221) is attached to the inner wall of the sheath body (100), the second part (222) overlaps with the first diaphragm section (210) and is connected and fixed to the first diaphragm section (210), and the third part (223) is used to fit with the insertion part (20).

8. The ureteral sheath according to claim 7, characterized in that: The thicknesses of the first part (221), the second part (222) and the third part (223) are all smaller than the thickness of the fourth part (224).

9. The ureteral sheath according to claim 7, characterized in that: In the closed state, the fourth portion (224) is recessed toward the inner wall of the sheath body (100) and has an arc-shaped structure.

10. A surgical device, characterized in that: The invention comprises an insertion part (20) and a ureteral sheath as claimed in any one of claims 1 to 9, wherein the insertion part (20) is provided with a second magnetic part (20a), and the second magnetic part (20a) is configured to be magnetically attracted to the first magnetic part (120) when the insertion part (20) is inserted into the surgical channel (110), so that the insertion part (20) is attached to the inner wall of the surgical channel (110).

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