Ureter guiding sheath

Abstract

The invention discloses a ureter guiding sheath. The ureter guiding sheath comprises a sheath base and a sheath tube. Wherein the sheath seat comprises a first sheath seat and a second sheath seat; a first connecting part is formed on the side, facing the second sheath base, of the first sheath base. A second connecting part is formed on one side, facing the first sheath seat, of the second sheath seat; wherein the first connecting part and the second connecting part are detachably connected. By means of the scheme, deep calculi in the renal calyx can be treated.

Description

Technical Field

[0001] This disclosure generally relates to the field of medical device technology. More specifically, this disclosure relates to a ureteral guiding sheath. Background Technology

[0002] A ureteral access sheath (UAS) is a commonly used medical device in urological surgery. Its primary function is to establish a pathway from the external urethral orifice to the kidney, allowing endoscopes (such as ureteroscopes and nephroscopes) or other surgical instruments to smoothly enter the urinary tract for examination or treatment. Understandably, in endoscopic surgeries for ureteral diseases, often targeting stones, strictures, foreign bodies, or tumors within the ureter (the tubular structure connecting the bladder and renal pelvis), a ureteral access sheath is necessary to create a pathway, ensuring instruments (such as rigid or flexible ureteroscopes) can reach the lesion site smoothly and minimizing damage to the ureteral mucosa. Specifically, procedures such as ureteral lithotripsy, ureteral stricture dilation / internal incision, and ureteral foreign body removal all require the use of a ureteral access sheath. In addition, in endoscopic surgery for diseases related to the renal pelvis and renal lesions, renal pelvis stones, lesions of the renal pelvis or renal calyces (branching chambers of the renal pelvis) (such as tumor biopsy, polyp removal) also need to be operated through natural orifices, and the ureteral guiding sheath is a key auxiliary device.

[0003] Once the ureteral guiding sheath enters the urinary tract through the patient's urethra, it establishes an effective channel, allowing surgical instruments such as a ureteroscope to smoothly enter and exit the urinary tract for stone removal procedures. However, in taller patients or those with hydronephrosis, their kidney stones are often deeper and farther from the urethral orifice. A uroscope combined with a standard ureteral guiding sheath is insufficient to reach these deeper stones, making it impossible to remove them.

[0004] Therefore, there is an urgent need to provide a ureteral guiding sheath to facilitate the treatment of stones located in deeper locations. Summary of the Invention

[0005] In order to at least address one or more of the technical problems mentioned above, this disclosure proposes a solution for a ureteral guiding sheath in several aspects.

[0006] In a first aspect, this disclosure provides a ureteral guiding sheath, the ureteral guiding sheath including a sheath seat and a sheath tube; wherein the sheath seat includes a first sheath seat and a second sheath seat; wherein a first connecting portion is formed on the side of the first sheath seat facing the second sheath seat; and a second connecting portion is formed on the side of the second sheath seat facing the first sheath seat; wherein the first connecting portion and the second connecting portion are detachably connected.

[0007] In some embodiments, the first connecting portion includes a stepped hole, and the second connecting portion includes a stepped shaft, wherein the stepped hole and the stepped shaft are snap-fitted together.

[0008] In some embodiments, a first protrusion is formed in the axial direction of the stepped hole, and a second protrusion is formed on the side of the stepped shaft in the axial direction away from the stepped shaft. The second protrusion and the side of the stepped shaft form a first groove. When the first sheath seat and the second sheath seat are assembled together, the first protrusion and the first groove are engaged and connected.

[0009] In some embodiments, the stepped hole includes a first recess and a second recess, the inner diameter of the first recess being larger than the inner diameter of the second recess, wherein the bottom surface of the second recess has a sealing groove, and a sealing component is disposed in the sealing groove.

[0010] In some embodiments, the first connecting portion and the second connecting portion are threaded together.

[0011] In some embodiments, the first connecting portion includes a first threaded groove, the inner surface of which has a first internal thread; the second connecting portion includes a first threaded protrusion, the outer surface of which has a first external thread; the first internal thread and the first external thread are engaged and connected.

[0012] In some embodiments, a second sealing groove is provided at the bottom of the first threaded groove, and a second sealing element is provided in the second sealing groove.

[0013] In some embodiments, the sheath seat further includes an infusion assembly, the infusion assembly including an infusion channel disposed on the side of the first sheath seat.

[0014] In some embodiments, a negative pressure assembly is provided at the bottom of the first sheath seat to provide a negative pressure environment for the sheath tube.

[0015] In some embodiments, a negative pressure adjusting cap is provided at the end of the first sheath seat, the negative pressure adjusting cap being used to adjust the seal of the first sheath seat.

[0016] With the ureteral guiding sheath provided above, this application allows for a detachable connection between the first and second connecting portions. When the patient's stone is located deep within the renal calyx, the second connecting portion can be detached, and consequently, the second sheath seat can be removed, thereby reducing the length of the uroscope occupied within the sheath seat. Furthermore, the uroscope can extend a longer distance from the first sheath seat, allowing for the treatment of stones located at deeper sites. Attached Figure Description

[0017] The above and other objects, features, and advantages of exemplary embodiments of this disclosure will become readily apparent upon reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of this disclosure are illustrated by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein: Figure 1 Exemplary structural diagrams of ureteral guiding sheaths according to some embodiments of this application are shown; Figure 2a An exemplary structural diagram of the first sheath seat of the ureteral guiding sheath according to some embodiments of this application is shown; Figure 2b An exemplary partial cross-sectional view of the first sheath seat of a ureteral guiding sheath according to some embodiments of this application is shown; Figure 2c An exemplary structural diagram of the second sheath seat of the ureteral guiding sheath according to some embodiments of this application is shown; Figure 2d An exemplary partial cross-sectional view of the second sheath seat of a ureteral guiding sheath according to some embodiments of this application is shown; Figure 2e An exemplary partial cross-sectional view of the snap-fit ​​connection between the first sheath seat and the second sheath seat of a ureteral guiding sheath according to some embodiments of this application is shown. Figure 3a An exemplary partial cross-sectional view of the first sheath seat of a ureteral guiding sheath according to other embodiments of this application is shown; Figure 3b An exemplary partial cross-sectional view of the second sheath seat of a ureteral guiding sheath according to other embodiments of this application is shown; Figure 3c An exemplary partial cross-sectional view of the threaded connection between the first sheath seat and the second sheath seat of a ureteral guiding sheath according to some embodiments of this application is shown. Figure 4 Exemplary structural diagrams of ureteral guiding sheaths according to other embodiments of this application are shown; Figure 5 An exemplary structural diagram of a first sheath seat of a ureteral guiding sheath, including a seal, is shown in some embodiments of this application.

[0018] Tag Name 1 - Sheath seat, 10 - First sheath seat, 11 - Stepped hole, 110 - First threaded groove, 1101 - Bottom surface of first threaded groove, 1102 - Side surface of first threaded groove, 111 - First protrusion, 1111 - First recess, 11111 - Side wall of first recess, 11112 - Bottom surface, 1112 - Second recess, 11121 - Side wall of second recess, 11122 - Bottom surface of second recess, 112 - Sealing groove, 113 - Sealing ring, 12 - Stepped shaft, 120 - First threaded protrusion, 121 - Second protrusion, 12111 - First boss, 12111 - Side wall of first boss, 12112 - Bottom surface of first boss, 1212 - Second boss, 12121 - Side wall of second boss, 12122 - Bottom surface of second boss, 123 - First groove, 13 - Negative pressure adjusting cap, 131 - First internal thread, 132 - Second external thread, 14 - Negative pressure assembly, 15 - Seal, 2 - Sheath, 20 - Second sheath seat, 210 - Second thread protrusion, 2101 - Second thread protrusion end face, 2102 - Second thread protrusion side face, 220 - Second thread groove, 30 - Injection assembly. Detailed Implementation

[0019] The technical solutions in the embodiments of this disclosure 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 this disclosure, not all of them. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0020] It should be understood that the terms “comprising” and “including” used in this disclosure and claims indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0021] It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of this disclosure. As used in this disclosure and claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in this disclosure and claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations.

[0022] As used in this specification and claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if [described condition or event] is detected" may be interpreted, depending on the context, as "once determined," "in response to determination," "once [described condition or event] is detected," or "in response to detection of [described condition or event]."

[0023] The specific embodiments disclosed herein will now be described in detail with reference to the accompanying drawings.

[0024] Figure 1 Exemplary structural diagrams of ureteral guiding sheaths according to some embodiments of this application are shown. Figure 1 As shown, the ureteral guiding sheath includes a sheath seat 1 and a sheath tube 2; wherein, the sheath seat 1 includes a first sheath seat 10 and a second sheath seat 20; wherein, the first sheath seat 10 has a first connecting portion formed on the side facing the second sheath seat 20; the second sheath seat 20 has a second connecting portion formed on the side facing the first sheath seat 10; wherein, the first connecting portion and the second connecting portion are detachably connected.

[0025] In some embodiments, the sheath 2 has a first dimension on the side away from the first sheath seat 10, and a second dimension on the side of the sheath 2 close to the first sheath seat 10, wherein the first dimension is less than or equal to the second dimension.

[0026] It should be understood that the "proximal end" mentioned in this application can refer to the end of the ureteral guiding sheath that is closer to the doctor during use, i.e., the end that is farther from the patient; the "distal end" mentioned in this application can refer to the end of the ureteral guiding sheath that is closer to the patient during use, i.e., the end that is farther from the doctor.

[0027] In some embodiments, the ureteral guiding sheath may include a sheath seat with a through-hole, into which a uroscope may be disposed. The aforementioned uroscope is an endoscopic instrument used for the examination, diagnosis, and minimally invasive treatment of the urinary system (e.g., kidneys, ureters, bladder, urethra, etc.). Specifically, the aforementioned uroscope may include a cystoscope, ureteroscope, nephroscope, and urethroscope, etc.

[0028] In some embodiments, a uroscope may include a scope body, which is the core component that enters the body. The outer layer of the uroscope may be made of a biocompatible material (such as medical stainless steel), and the inner wall may integrate optical channels, operating channels, and irrigation / suction channels. Furthermore, the uroscope may also include an optical imaging system, with an imaging component (such as a miniature camera) at its front end. Even further, the uroscope may include an operating channel into which auxiliary instruments, such as lithotripsy tools (laser fiber, pneumatic ballistic probe), retrieval tools (stone retrieval basket, biopsy forceps), and supports, can be inserted.

[0029] In some embodiments, the uroscope may also have an irrigation / suction channel. The irrigation channel can be connected to saline or irrigation fluid to continuously irrigate the intraoperative field of view, removing blood and stone fragments to ensure clear images. Simultaneously, the irrigation pressure can expand the lumen (such as the ureter) to facilitate instrument manipulation. The suction channel can be connected to a negative pressure device when needed (e.g., in cases of massive bleeding or stone accumulation) to aspirate fluid or foreign objects, preventing obstruction of the field of view. Furthermore, the uroscope may also include an operating handle, which allows the user to easily adjust the angle, advance and retreat the instrument, and control the irrigation / suction switch.

[0030] In some embodiments, the through hole in the sheath seat may include a first through hole and a second through hole, wherein the first through hole and the second through hole may be connected. Specifically, the first through hole may be located within the first sheath seat 10, and the second through hole may be located within the second sheath seat 20.

[0031] In some embodiments, the distal end of the sheath seat 1 can be connected to the sheath tube 2, and further, the distal end of the first sheath seat 10 can be connected to the sheath tube 2.

[0032] In some embodiments, the proximal end of the first sheath seat 10 can be detachably connected to the distal end of the second sheath seat 20. Specifically, a first connecting portion can be formed on the side of the first sheath seat 10 facing the second sheath seat 20, that is, a first connecting portion can be formed on the proximal end of the first sheath seat 10. A second connecting portion can be formed on the side of the second sheath seat 20 facing the first sheath seat 10, that is, a second connecting portion can be formed on the distal end of the second sheath seat 20.

[0033] In some embodiments, the detachable connection between the first connecting portion and the second connecting portion may include a snap-fit ​​connection or a threaded connection, which will be discussed later. Figures 2a-2e as well as Figures 3a-3c The connection method of the first connecting part and the second connecting part is described in detail.

[0034] It is understood that by making the first connecting part and the second connecting part detachable, the first connecting part and the second connecting part can also be detachable. When the urinary tract is placed inside the ureteral guiding sheath, the urinary tract can pass through the first sheath seat 10 and the second sheath seat 20, and the length of the urinary tract occupied in the sheath seat can include at least the length of the first sheath seat 10 along the distal to proximal direction and the length of the second sheath seat 20 along the distal to proximal direction.

[0035] Understandably, when a patient's stone is located deep within the renal calyx and the original urinary tract cannot access it, the second sheath 20 can be removed. In this case, the length of the urinary tract occupied within the sheath can include the length of the first sheath 10 along the distal to proximal direction. Therefore, the urinary tract corresponding to the length of the second sheath 20 along the distal to proximal direction can at least partially continue into the renal calyx, thereby increasing the length of the urinary tract entering the renal calyx and allowing the urinary tract to approach stones located deeper within the calyx.

[0036] In some embodiments, the sheath 2 may include a first sheath and a second sheath. The first sheath may be the distal portion of the sheath 2 (i.e., the side of the sheath 2 away from the first sheath seat), and the second sheath may be the proximal portion of the sheath 2 (i.e., the side of the sheath 2 close to the first sheath seat). The first sheath may have a first size, and the second sheath may have a second size.

[0037] In some embodiments, the first dimension may be equal to the second dimension, or the first dimension may be smaller than the second dimension.

[0038] Specifically, when the first dimension is equal to the second dimension, the inner diameter of the first sheath can be equal to the inner diameter of the second sheath, and the outer diameter of the first sheath can also be equal to the outer diameter of the second sheath.

[0039] In some embodiments, when the first dimension is smaller than the second dimension, the inner diameter of the first sheath can be smaller than the inner diameter of the second sheath, and the outer diameter of the first sheath can also be smaller than the outer diameter of the second sheath.

[0040] Furthermore, when the first dimension is smaller than the second dimension, the second sheath may include a transition section and a large-diameter section. Along the direction from the distal end to the proximal end, the second dimension corresponding to the transition section of the second sheath may gradually increase, while the second dimension corresponding to the large-diameter section of the second sheath may remain unchanged.

[0041] It should be understood that the second dimension corresponding to the transition section of the aforementioned second sheath can gradually increase, which may include a linear or non-linear increase. When the second dimension increases linearly, the magnitude of the increase can remain constant along the direction from the distal to the proximal end. When the second dimension increases non-linearly, the magnitude of the increase can gradually decrease or gradually increase along the direction from the distal to the proximal end.

[0042] It is understandable that after a uroscope is installed in the aforementioned ureteral guiding sheath, the uroscope can penetrate the aforementioned first and second sheaths.

[0043] In the first sheath, the distance between the uroscope and the inner wall of the first sheath can remain constant. In the transition section of the second sheath, along the direction from the distal to the proximal end, since the second dimension of the transition section of the second sheath gradually increases, that is, both the inner and outer diameters of the transition section of the second sheath gradually increase, the distance between the uroscope and the inner wall of the transition section of the second sheath can also gradually increase. When gravel flows between the uroscope and the inner wall of the transition section of the second sheath, compared with gravel flowing through the first sheath, the accumulation of gravel in the transition section of the second sheath can be avoided.

[0044] Figure 2a An exemplary structural diagram of the first sheath seat of the ureteral guiding sheath according to some embodiments of this application is shown; Figure 2b An exemplary partial cross-sectional view of the first sheath seat of a ureteral guiding sheath according to some embodiments of this application is shown. Figure 2a and Figure 2b As shown, the first connecting part includes a stepped hole 11, and the second connecting part includes a stepped shaft 12, wherein the stepped hole 11 and the stepped shaft 12 are snap-fit ​​connected.

[0045] In some embodiments, a first protrusion 111 is formed in the axial direction of the stepped hole 11, and a second protrusion 121 is formed on the side of the stepped shaft 12 away from the axial direction of the stepped shaft 12. The second protrusion 121 and the side of the stepped shaft 12 are formed with a first groove 123. When the first sheath seat 10 and the second sheath seat 20 are assembled together, the first protrusion 111 and the first groove 123 are connected.

[0046] In some embodiments, the stepped hole 11 includes a first recess 1111 and a second recess 1112, wherein the inner diameter of the first recess 1111 is larger than the inner diameter of the second recess 1112, and the bottom surface of the second recess 1112 has a sealing groove, wherein a sealing component is disposed in the sealing groove.

[0047] In some embodiments, the aforementioned stepped hole 11 may include a plurality of notches with different diameters, such as a first notch 1111 and a second notch 1112, wherein the axis of the first notch 1111 may be parallel to the axis of the second notch 1112, and the inner diameter of the first notch 1111 may be larger than the inner diameter of the second notch 1112.

[0048] In some embodiments, the first notch 1111 may be located near the end of the second notch 1112.

[0049] In some embodiments, the first notch 1111 may include a first notch sidewall 11111 and a first notch bottom surface 11112. Further, the second notch 1112 may include a second notch sidewall 11121 and a second notch bottom surface 11122, wherein the first notch bottom surface 11112 and the second notch sidewall 11121 may be vertically connected, and the two may form a stepped portion.

[0050] In some embodiments, the first protrusion 111 formed in the stepped hole 11 in the axial direction of the stepped hole may include the first protrusion 111 formed in the axial direction of the first recess sidewall 11111 in the axial direction of the first recess.

[0051] Figure 2c An exemplary structural diagram of the second sheath seat of the ureteral guiding sheath according to some embodiments of this application is shown; Figure 2d An exemplary partial cross-sectional view of the second sheath seat of a ureteral guiding sheath according to some embodiments of this application is shown. Figure 2e An exemplary partial cross-sectional view of the snap-fit ​​connection between the first sheath seat and the second sheath seat of some embodiments of the ureteral guiding sheath is shown. Figure 2c , Figure 2d and Figure 2e As shown, along the direction from the proximal end to the distal end, the stepped shaft 12 may include a first boss 1211 and a second boss 1212, wherein the radial dimension of the first boss 1211 may be larger than the radial dimension of the second boss 1212. In some embodiments, the aforementioned first boss 1211 may include a first boss sidewall 12111 and a first boss bottom surface 12112. Further, a second boss 1212 may be formed on the first boss bottom surface 12112, and the second boss 1212 may have a second boss sidewall 12121 and a second boss bottom surface 12122, wherein the second boss sidewall 12121 may be connected to the first boss bottom surface 12112.

[0052] In some embodiments, a second protrusion 121 may be formed on the sidewall 12111 of the first boss in the direction of the axis of the first boss. The second protrusion 121 and the sidewall 12111 of the first boss may form a first groove 123, which may engage with the first protrusion 111. In some embodiments, the aforementioned second protrusion 121 may be provided in multiple ways.

[0053] When the first sheath seat 10 and the second sheath seat 20 are assembled together, the first recess sidewall 11111 and the first boss sidewall 12111 can at least partially abut together. At this time, the second protrusion 121 can be located at the distal end of the first protrusion 111, and the first protrusion 111 can engage with the first groove 123. Furthermore, the bottom surface 12112 of the first boss can at least partially abut together with the bottom surface 11112 of the first recess, the second boss sidewall 12121 can at least partially abut together with the second recess sidewall 11121, and the bottom surface 12122 of the second boss can at least partially abut together with the bottom surface 11122 of the second recess.

[0054] Furthermore, a second through hole can be formed on the bottom surface 12122 of the second boss, and a first through hole can be formed on the bottom surface 12112 of the first boss. The aforementioned first through hole and second through hole can be connected together.

[0055] In some embodiments, an annular sealing groove 112 may be formed on the bottom surface 11122 of the second recess, the axis of which may coincide with the axis of the second recess. Further, the sealing assembly may include a sealing ring 113, which may be disposed within the aforementioned annular sealing groove. Further still, along the aforementioned axis, the thickness of the sealing ring in that direction may be greater than the thickness of the sealing groove in that direction, such that after the sealing ring is disposed within the sealing groove, a portion of the sealing ring may extend out in that direction.

[0056] When the first sheath seat 10 and the second sheath seat 20 are installed, the first recessed sidewall 11111 of the first sheath seat 10 can first contact the first protrusion sidewall 12111, and the two can move relative to each other along the axial direction. Further, the first groove 123 and the first protrusion 111 can gradually approach each other, and then the bottom surface 12122 of the second protrusion can contact the sealing ring on the bottom surface 11122 of the second recess. Even further, the bottom surface 12122 of the second protrusion can press the sealing ring along the axial direction, causing the sealing ring to be compressed and deformed. At this time, the aforementioned first protrusion 111 can extend into the first groove 123, and the two can form a snap-fit ​​connection.

[0057] It is understandable that by pressing the sealing ring along the axis with the first protrusion 111, a good seal can be achieved between the first sheath seat 10 and the second sheath seat 20.

[0058] Figure 3a An exemplary partial cross-sectional view of the first sheath seat of a ureteral guiding sheath according to other embodiments of this application is shown; Figure 3b An exemplary partial cross-sectional view of the second sheath seat of a ureteral guiding sheath according to other embodiments of this application is shown. Figure 3c An exemplary partial cross-sectional view of the threaded connection between the first sheath seat and the second sheath seat of some embodiments of the ureteral guiding sheath is shown. Figure 3a , Figure 3b as well as Figure 3c As shown, the first connecting portion and the second connecting portion are threadedly connected. In some embodiments, the first connecting portion includes a first threaded groove, the inner surface of which has a first internal thread; the second connecting portion includes a second threaded protrusion, the outer surface of which has a second external thread; the first internal thread and the second external thread are engaged. In some embodiments, a second sealing groove is provided at the bottom of the first threaded groove, and a second sealing element is provided within the second sealing groove.

[0059] In some embodiments, the first connecting portion and the second connecting portion are threadedly connected. Specifically, the first connecting portion may include a first threaded groove 110, which may include a first threaded groove bottom surface 1101 and a first threaded groove side surface 1102, and a first internal thread 131 may be formed on the first threaded groove side surface 1102. Further, a first threaded protrusion 120 may be formed along the axis on the first threaded groove bottom surface 1101, and a first through hole may be formed inside the first threaded protrusion 120. Even further, an annular groove may be formed between the aforementioned first threaded groove 110 and first threaded protrusion 120.

[0060] In some embodiments, the second connecting portion may include a second threaded protrusion 210, which may include a second threaded protrusion end face 2101 and a second threaded protrusion side face 2102. A second external thread 132 that mates with the first internal thread 131 may be formed on the second threaded protrusion side face 2102. Further, a second threaded groove 220 may be formed along the axis on the second threaded protrusion end face 2101, and a second through hole may be formed on the bottom surface of the second threaded groove 220, which can mate with the first through hole. It is understood that the second threaded protrusion 210 may be an annular protrusion in this case.

[0061] After the first connecting part and the second connecting part are connected together by threads, the aforementioned annular protrusion can be disposed in the aforementioned annular groove, and the second external thread on the side 2102 of the second threaded protrusion can be engaged with the first internal thread on the side 1102 of the first threaded groove.

[0062] Furthermore, a second sealing groove can be provided on the bottom surface 1101 of the first threaded groove, and a second sealing component can be provided in the second sealing groove, wherein the second sealing component may include a second sealing ring. When the first connecting part and the second connecting part are installed together, the second threaded protrusion 210 of the second connecting part can compress the aforementioned second sealing ring, thereby increasing the sealing effect.

[0063] Figure 4 Exemplary structural diagrams of ureteral guiding sheaths according to other embodiments of this application are shown. Figure 4 As shown, the sheath seat 1 also includes an infusion assembly 30, which includes an infusion channel disposed on the side of the first sheath seat 10.

[0064] In some embodiments, the infusion assembly 30 may further include an infusion conduit disposed within a first channel. The outer wall of the infusion conduit and the inner wall of the first channel may form a first flow channel, and a second flow channel may be formed inside the infusion conduit. It is understood that one or more openings may be provided on the side of the infusion conduit, allowing the first flow channel to connect with the second flow channel. Furthermore, the opening may be inclined, and the angle between the direction along the axis of the opening from the first flow channel to the second flow channel and the direction from the distal end to the proximal end may be an acute angle.

[0065] In some embodiments, an infusion channel may be provided on the side of the first sheath seat 10, and this infusion channel may be connected to the first flow channel. When infusion water is added to the infusion channel, the infusion water can flow from the infusion channel into the first flow channel, and then flow into the second flow channel through the opening. It should be understood that one end of the second flow channel may be connected to the channel inside the sheath tube 2, and the other end of the second flow channel may be connected to the second channel. When the gravel moves in a direction from the distal end to the proximal end, the gravel can move in a direction from the first sheath tube channel to the second flow channel, and then to the second sheath seat channel. When the gravel flows into the second flow channel, infusion water can be added to the infusion channel. The infusion water can flow from the infusion channel into the first flow channel, and then flow into the second flow channel through the opening. It should be understood that the angle between the infusion water flowing into the second flow channel and the direction of gravel movement can be an acute angle. Therefore, the infusion water can push the gravel towards the proximal end to continue flowing, accelerating the outflow of the stone, thereby preventing the accumulation of gravel in the second flow channel.

[0066] In some embodiments, multiple openings can be provided, and it is understood that multiple openings can be located at the distal end of the infusion pipe. The smaller the area of ​​the openings, i.e., the smaller the cross-sectional area of ​​the infusion water flowing through these openings, the greater the flow velocity of the infusion water through these openings can be. Therefore, depending on the flow of the stones, smaller openings can be provided in areas prone to accumulation to accelerate the outflow of stones, thereby preventing the accumulation of stones in these areas. Figure 5 An exemplary structural diagram of a first sheath seat of a ureteral guiding sheath, including a seal, is shown according to some embodiments of this application. Figure 5 As shown, in some embodiments, a negative pressure assembly 14 is provided at the bottom of the first sheath seat 10 to provide a negative pressure environment for the sheath tube 2. In some embodiments, a negative pressure adjusting cap 13 is provided at the end of the first sheath seat 10, the negative pressure adjusting cap being used to adjust the seal of the first sheath seat 10.

[0067] In some embodiments, the suction end of the negative pressure component can be connected to a second flow channel, through which the negative pressure component can draw out the stone.

[0068] It should be understood that when the first sheath seat 10 and the second sheath seat 20 are assembled together, a negative pressure adjusting cap can be provided at the end of the second sheath seat 20. Furthermore, after the first sheath seat 10 and the second sheath seat 20 are disassembled, a negative pressure adjusting cap can be provided at the end of the first sheath seat 10. Even further, the aforementioned negative pressure adjusting cap may contain a sealing component, which, when installed at the end of the first sheath seat 10 or the end of the second sheath seat 20, can respectively seal the first sheath seat 10 and the second sheath seat 20.

[0069] In some embodiments, a negative pressure component 14 is provided at the bottom of the first sheath seat 10. This negative pressure component 14 can be connected to the sheath channel of the sheath tube 2, providing a negative pressure environment to the sheath channel, thereby drawing out the gravel located inside the sheath tube 2. It is understood that even after separating the first and second sheath seats, the sheath tube can still be extracted under negative pressure because the negative pressure component 14 is located on the first sheath seat.

[0070] In some embodiments, when the uroscope (sheath) is placed inside the sheath seat, it needs to be sealed. A negative pressure adjusting cap can be provided at the end of the second sheath seat away from the first sheath seat (i.e., the proximal end of the second sheath seat), and the sealing element of the negative pressure adjusting cap itself can be used to achieve the seal.

[0071] In other embodiments, a sealing element 15 may be provided on the disassembled first sheath seat. The sealing element 15 may be located at the proximal end of the first sheath seat to achieve the aforementioned sealing of the sheath. Furthermore, a negative pressure adjusting cap may be provided on the distal end of the disassembled first sheath seat, and the sealing of the sheath may be achieved through the sealing element inside the negative pressure adjusting cap.

[0072] In summary, in the solution of this application, the first connecting part and the second connecting part are detachably connected. When the patient's stone is located deep within the renal calyx, the second connecting part can be detached, and the second sheath can be removed, thereby reducing the length of the uroscope occupied within the sheath. Furthermore, the uroscope can extend a longer length from the first sheath, allowing for the treatment of stones located at deeper sites.

[0073] While numerous embodiments of this disclosure have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many modifications, alterations, and alternatives will occur to those skilled in the art without departing from the spirit and intent of this disclosure. It should be understood that various alternatives to the embodiments of this disclosure described herein may be employed in the practice of this disclosure. The appended claims are intended to define the scope of this disclosure and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. A ureteral guiding sheath, characterized in that, The ureteral guiding sheath includes a sheath seat (1) and a sheath tube (2); wherein, The sheath seat (1) includes a first sheath seat (10) and a second sheath seat (20); wherein, The first sheath seat (10) has a first connecting portion formed on the side facing the second sheath seat (20); The second sheath (20) has a second connecting portion formed on the side facing the first sheath (10); The first connecting part and the second connecting part are detachably connected.

2. The ureteral guiding sheath according to claim 1, characterized in that, The first connecting part includes a stepped hole (11), and the second connecting part includes a stepped shaft (12), wherein the stepped hole (11) and the stepped shaft (12) are snap-fit ​​connected.

3. The ureteral guiding sheath according to claim 2, characterized in that, The stepped hole (11) has a first protrusion formed in the axial direction of the stepped hole, and the side of the stepped shaft (12) has a second protrusion (121) formed in the axial direction away from the stepped shaft (12). The second protrusion (121) and the side of the stepped shaft (12) have a first groove. When the first sheath seat (10) and the second sheath seat (20) are assembled together, the first protrusion and the first groove are connected in a cooperative manner.

4. The ureteral guiding sheath according to claim 2, characterized in that, The stepped hole (11) includes a first recess (1111) and a second recess (1112). The inner diameter of the first recess (1111) is larger than the inner diameter of the second recess (1112). The bottom surface of the second recess (1112) has a sealing groove, and a sealing component is provided in the sealing groove.

5. The ureteral guiding sheath according to claim 1, characterized in that, The first connecting part and the second connecting part are threaded together.

6. The ureteral guiding sheath according to claim 5, characterized in that, The first connecting portion includes a first threaded groove, and the inner surface of the first threaded groove has a first internal thread; The second connecting portion includes a first threaded protrusion, the outer surface of which has a first external thread; The first internal thread and the first external thread are connected in a mating manner.

7. The ureteral guiding sheath according to claim 6, characterized in that, A second sealing groove is provided at the bottom of the first threaded groove, and a second sealing element is provided inside the second sealing groove.

8. The ureteral guiding sheath according to claim 1, characterized in that, The sheath (1) further includes an infusion assembly (30), which includes an infusion channel disposed on the side of the first sheath (10).

9. The ureteral guiding sheath according to claim 1, characterized in that, The bottom of the first sheath seat (10) is provided with a negative pressure component to provide a negative pressure environment for the sheath tube (2).

10. The ureteral guiding sheath according to claim 2, characterized in that, The end of the first sheath (10) is provided with a negative pressure adjustment cap, which is used to adjust the seal of the first sheath (10).

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