Ureteral guiding sheath

Abstract

The present invention provides a ureteral guiding sheath, which comprises a sheath tube, at least one water inlet pipe, and a heat shrinkable tube. The sheath tube is of a hollow structure. The sheath tube and a part of the water inlet pipe are sleeved inside the heat shrinkable tube. The water inlet pipe and the sheath tube form a multi-cavity structure. A first water outlet part is arranged at one end of the water inlet pipe close to the water outlet. A second water outlet part is arranged at one end of the heat shrinkable tube close to the water outlet. The first water outlet part and the second water outlet part overlap and face away from the sheath tube. By the above method, when the end part of the ureteral guiding sheath of the present invention is bent, the pressure at the end part can be eliminated, and the operation is more convenient.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and particularly to a ureteral guiding sheath. Background Art

[0002] A guiding sheath is a commonly used medical device in urology, mainly used in ureteroscopic lithotripsy. In ureteroscopic lithotripsy, the guiding sheath first enters the patient's body and directly penetrates near the lesion site under imaging, so as to assist the endoscope and other instruments to enter the lesion organ (kidney, gallbladder or ureter, etc.), provide a continuous operation channel for them, protect the lesion organ during repeated exchange of instruments, reduce trauma to it, and at the same time protect the precision instruments from damage.

[0003] In ureteroscopic lithotripsy, the lesion organ is sometimes in a shriveled state and needs to be continuously injected with normal saline to keep it in a filled state. At the same time, the crushed stones need to be washed and discharged in time. The first-generation guiding sheath has only one channel, which needs to supply instruments such as endoscopes to enter and at the same time needs to introduce a water inlet pipe to maintain the lesion organ in a filled state. This results in doctors needing to repeatedly replace instruments (observing requires replacing the endoscope, and introducing water requires replacing the water inlet device), which is inconvenient for doctors to operate. There are several improved solutions on the market: one is to update the instrument to make it have one or more of the functions of endoscopy, stone removal, water inlet, etc.; the second is to add a water inlet channel to the guiding sheath (for example, CN104644242A); the third is to set an expander at the end of the guiding sheath (for example, CN219595583U). For the first method, since the size of the guiding sheath cannot be too large (too large will cause too much trauma to the human body), the more integrated functions, the higher the requirements for the instrument. And during the doctor's repeated stone removal and stone discharge processes, it is not easy to control the pressure inside the lesion organ, increasing the operation difficulty, and the complex internal environment of the lesion organ is not considered. For example, the kidney has multiple chambers, and it is often necessary for the end of the guiding sheath and other instruments to be able to turn. For the second method, due to the complex internal environment of the lesion organ, for example, the kidney has multiple chambers, and it is often necessary for the end of the guiding sheath and other instruments to be able to turn. When injecting water simultaneously during the bending process, pressure will be generated at the bending part, resulting in difficult operation. For the third method, due to the complex internal environment of the lesion organ, for example, the kidney has multiple chambers, the expander is difficult to take into account multiple chambers and cannot adapt to the complex environment. That is, several current improved methods do not consider that the end of the guiding sheath needs to be bent, resulting in difficult operation. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a ureteral guiding sheath to reduce the operation difficulty.

[0005] To achieve the above object, the present invention provides the following technical solution: a ureteral guiding sheath, comprising a sheath tube, at least one water inlet pipe, and a heat-shrinkable tube. The sheath tube is a hollow structure for passing an endoscope. The sheath tube and a part of the water inlet pipe are sleeved inside the heat-shrinkable tube. The water inlet pipe and the sheath tube form a multi-chamber structure. One end of the water inlet pipe close to the water outlet is provided with a first water outlet part, and one end of the heat-shrinkable tube close to the water outlet is provided with a second water outlet part. The first water outlet part and the second water outlet part overlap and face away from the sheath tube.

[0006] As an embodiment, the cross-section of the water inlet pipe includes a straight part and a curved part, and the straight part and the curved part form a D shape. The straight part is in contact with the sheath tube.

[0007] As an embodiment, the first water outlet part includes at least one water outlet hole, and the second water outlet part includes an opening for exposing the water outlet hole.

[0008] As an embodiment, the water inlets of multiple water inlet pipes are the same, and the water outlets are distributed along the circumferential direction of the sheath tube.

[0009] As an embodiment, reinforcing rib strips are arranged on the inner wall of the water inlet pipe along the length direction of the water inlet pipe.

[0010] As an embodiment, there are multiple reinforcing rib strips in each water inlet pipe. The multiple reinforcing rib strips are arranged at intervals along the circumferential direction of the inner wall of the water inlet pipe, and a first gap is formed between adjacent two reinforcing rib strips.

[0011] As an embodiment, the reinforcing rib strips are in the shape of a convex platform, and the upper surface of the reinforcing rib strips is arc-shaped.

[0012] As an embodiment, the length of the reinforcing rib strips is equal to the length of the water inlet pipe.

[0013] As an embodiment, one end of the sheath tube away from the water outlet is connected to a Y-shaped joint. The Y-shaped joint includes a main channel and a branch channel. The main channel is connected to the sheath tube for the endoscope to penetrate. One end of the branch channel is connected to the main channel, and the other end is connected to a negative pressure suction assembly. A sealing rubber ring is arranged in the main channel, and a through hole matching the endoscope is opened on the sealing rubber ring.

[0014] As an embodiment, another part of the water inlet pipe is arranged obliquely outward along the outer surface of the sheath tube.

[0015] As an embodiment, the inclination angle between the water inlet pipe and the sheath tube is 20°-30°.

[0016] As an embodiment, an angle fixer is arranged on the water inlet pipe along the inclined part of the sheath tube.

[0017] Compared with the prior art, the above technical solution brings the following technical effects:

[0018] The ureteral guiding sheath of the present invention includes a sheath tube, at least one water inlet pipe, and a heat shrinkable tube. The sheath tube is a hollow structure. The sheath tube and a part of the water inlet pipe are sleeved inside the heat shrinkable tube. The water inlet pipe and the sheath tube form a multi-chamber structure. One end of the water inlet pipe close to the water outlet is provided with a first water outlet part. One end of the heat shrinkable tube close to the water outlet is provided with a second water outlet part. The first water outlet part and the second water outlet part overlap and face away from the sheath tube. In this way, on the basis of arranging the water inlet pipe and forming a multi-chamber structure with the sheath tube, the present invention also opens a water outlet part at the end of the water inlet pipe, so that when the end of the ureteral guiding sheath is bent, the pressure at the end can be eliminated, making the operation more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0020] Figure 1 is a schematic structural diagram of the water outlet end of the ureteral guiding sheath in the embodiment of the present invention;

[0021] Figure 2 is an enlarged schematic structural diagram of the water outlet end of the ureteral guiding sheath in the embodiment of the present invention;

[0022] Figure 3 is another enlarged schematic structural diagram of the water outlet end of the ureteral guiding sheath in the embodiment of the present invention;

[0023] Figure 4 is a three-dimensional structural diagram of the ureteral guiding sheath in the embodiment of the present invention;

[0024] MAIN ELEMENT SYMBOL DESCRIPTION:

[0025] 10. Sheath tube; 20. Water inlet pipe; 30. Heat shrinkable tube; 21. First water outlet part; 31. Second water outlet part; 22. Reinforcing rib; 23. First gap; 40. Y-shaped joint; 41. Main channel; 42. Branch channel; 50. Angle fixator. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The following will describe in detail the embodiments of the present invention. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as limiting the present invention.

[0027] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention.

[0028] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the present invention, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0031] As Figures 1 to 2As shown in the figure, the ureteral guiding sheath of this embodiment includes a sheath tube 10, at least one water inlet pipe 20, and a heat-shrinkable tube 30. The sheath tube 10 is a hollow structure and is used for machines such as endoscopes to pass through. At least one water inlet pipe 20 is arranged around the sheath tube 10, and the water inlet pipe 20 and the sheath tube 1 form a multi-chamber structure. The sheath tube 10 and part of the water inlet pipe 20 are sleeved in the heat-shrinkable tube 30, that is, part of the water inlet pipe 20 is sleeved in the heat-shrinkable tube 30, and the other part is exposed. One end of the water inlet pipe 20 close to the water outlet is provided with a first water outlet part 21, and one end of the heat-shrinkable tube 30 close to the water outlet is provided with a second water outlet part 31. The first water outlet part 21 and the second water outlet part 31 overlap and face away from the sheath tube 10, that is, the water outlet direction of the first water outlet part 21 does not point to the sheath tube 10, so as to facilitate the discharge of liquid. When the end of the ureteral guiding sheath is in a straight state, most of the liquid in the water inlet pipe 20 flows out from the water outlet, and a small part flows out from the first water outlet part 21; when the end of the ureteral guiding sheath is in a bent state, most of the liquid flows out from the first water outlet part 21, and a small amount of liquid flows out from the water outlet. In this way, the ureteral guiding sheath can be bent at will, can better adapt to various use scenarios, and reduce the use difficulty. At present, after testing, it generally takes more than 3 hours for existing guiding sheaths to be used by doctors in similar surgical procedures, while using the present invention can reduce the time by more than half.

[0032] The ureteral guiding sheath of the present invention includes a sheath tube, at least one water inlet pipe, and a heat-shrinkable tube. The sheath tube is a hollow structure. The sheath tube and part of the water inlet pipe are sleeved in the heat-shrinkable tube. The water inlet pipe and the sheath tube form a multi-chamber structure. One end of the water inlet pipe close to the water outlet is provided with a first water outlet part, and one end of the heat-shrinkable tube close to the water outlet is provided with a second water outlet part. The first water outlet part and the second water outlet part overlap and face away from the sheath tube. By the above method, on the basis of setting the water inlet pipe and forming a multi-chamber structure with the sheath tube, the present invention also opens a water outlet part at the end of the water inlet pipe, so that when the end of the ureteral guiding sheath is bent, the pressure at the end can be eliminated and the operation is more convenient.

[0033] In one embodiment, in order to better open holes on the first water outlet part, an opening can be first made on one end of the heat-shrinkable tube 30 close to the water outlet of the ureteral guiding sheath, and then after heat shrinkage, an opening is made on one end of the water inlet pipe 20 close to the water outlet, so that the first water outlet part 21 includes at least one water outlet hole, and the second water outlet part 31 includes an opening for the water outlet hole to be exposed. In specific implementation, it is also possible not to make an opening on one end of the heat-shrinkable tube 30 close to the water outlet of the ureteral guiding sheath, and after heat shrinkage, openings are made on one ends of the water inlet pipe 20 and the heat-shrinkable tube 30 close to the water outlet.

[0034] In one embodiment, the water inlets of the plurality of water inlet pipes 20 are the same, and the water outlets are circumferentially distributed along the sheath 10. In this way, the plurality of water inlet pipes 20 are circumferentially distributed along the sheath 10, and each water inlet pipe 20 is provided with a water outlet, so that the water outlet effect can be ensured no matter how the ureteral guiding sheath bends at any angle.

[0035] In one embodiment, continue to refer to Figure 1 and Figure 2 , reinforcing ribs 22 are arranged on the inner wall of the water inlet pipe 20 along the length direction of the water inlet pipe 20. Arranging the reinforcing ribs 22 in the water inlet pipe 20 can effectively prevent the situation that when bending, the reinforcing ribs 22 first contact the wall of the water inlet pipe 20 and other parts remain unobstructed, thus avoiding the blockage of the water inlet pipe caused by bending. In one embodiment, if the number of the reinforcing ribs 22 is 1, the optimal implementation is that the reinforcing rib 22 is located on the plane where the center of the sheath 10 and the center of the water inlet pipe 20 are located (the center of the sheath 10, the center of the water inlet pipe 20, and the midpoint of the cross-section of the reinforcing rib 22 are on the same straight line). At this time, since the diameter of the sheath 10 is larger than the diameter of the water inlet pipe 20, no matter how the sheath 10 bends, the water inlet pipe 20 will not be crushed (if the sheath 10 bends in the first direction, the first direction is perpendicular to the straight line where the center of the sheath 10, the center of the water inlet pipe 20, and the reinforcing rib 22 are located, since the water inlet pipe 20 will slide in the heat shrinkable tube 30 when bending, the bending degree of the water inlet pipe 20 will be less than that of the sheath 10), so that the channel of the water inlet pipe 20 can be ensured not to be blocked to the greatest extent.

[0036] In one embodiment, continue to refer to Figure 2 , the reinforcing ribs 22 in each water inlet pipe 20 are multiple, and the multiple reinforcing ribs 22 are circumferentially spaced along the inner wall of the water inlet pipe 20, and a first gap 23 is formed between two adjacent reinforcing ribs 22. The setting of the first gap 23 is mainly to ensure that the water inlet pipe 20 can be bent without affecting the use in the bent state.

[0037] In one embodiment, continue to refer to Figure 2 , the reinforcing rib 22 is in the shape of a convex platform, the upper surface of the reinforcing rib 22 is arc-shaped, and its cross-section is similar to a trapezoid, except that the upper surface is arc-shaped. When the multiple reinforcing ribs 22 are bent, the multiple reinforcing ribs 22 approach each other, and a channel can also be formed in the middle to ensure water inlet. In specific implementation, the reinforcing rib 22 can also be of other shapes, such as a rectangle or a square in cross-section. In this application, the water inlet pipe 20 can be circular, and of course, it can also be of other shapes, such as Figure 3As shown, as another embodiment, the water inlet pipe 20 is D-shaped. The water inlet pipe 20 includes a straight part and a curved part. The two sides of the straight part and the curved part are connected end to end, so that the cross-section forms a D shape, and the straight part is in contact with the sheath tube (10). If the overall size of the ureteral guiding sheath remains unchanged, when the water inlet pipe 20 is D-shaped instead of circular, the diameter of the sheath tube 10 can be relatively larger, which is more convenient for doctors to perform surgical operations; if the diameter of the sheath tube 10 is the same, the cross-section of the D-shaped water inlet pipe 20 is smaller than that of the circular water inlet pipe 20, so that the overall size of the ureteral guiding sheath can be made smaller, resulting in less trauma to the human body and being more conducive to recovery.

[0038] In one embodiment, the length of the reinforcing rib 22 is equal to the length of the water inlet pipe 20. In specific implementation, generally only the water outlet part of the ureteral guiding sheath will be bent during normal use, so the reinforcing rib 22 can be provided only at the part of the water inlet pipe 20 close to the water outlet. The length of the reinforcing rib 22 being equal to the length of the water inlet pipe 20 can avoid unexpected situations caused by abnormal use due to other reasons resulting in bending of other parts.

[0039] In one embodiment, refer to Figure 4 , one end of the sheath tube 10 away from the water outlet is connected to a Y-shaped joint 40. The Y-shaped joint 40 includes a main channel 41 and a branch channel 42. The main channel 41 is connected to the sheath tube 10 for instruments such as endoscopes to penetrate. One end of the branch channel 42 is connected to the main channel 41, and the other end is connected to a negative pressure suction assembly (not shown in the figure). A sealing rubber ring (not shown in the figure) is provided in the main channel 41, and a through hole matching the endoscope is opened on the sealing rubber ring. After the stone extraction instrument penetrates into the sheath tube 10 through the main channel 41 and the stone is taken out, the negative pressure suction assembly sucks the liquid and the stone out through the branch channel 42. A through hole matching the endoscope is opened on the sealing rubber ring to prevent liquid leakage and air from entering the branch channel 42 from the main channel 41, which affects the negative pressure suction assembly sucking the liquid and the stone out through the branch channel 42.

[0040] In one embodiment, refer to Figure 4 , in order to facilitate the connection between the water inlet pipe 20 and the external liquid, the other part of the water inlet pipe 20 is arranged to incline outward along the outer surface of the sheath tube 10. In a specific embodiment, the inclination angle between the water inlet pipe 20 and the sheath tube 10 is 20° - 30°. In this way, it can not only ensure that the water inlet pipe 20 will not be bent and flattened to ensure the water inlet effect, but also facilitate the connection between the water inlet pipe 20 and the external liquid.

[0041] In one embodiment, refer to Figure 4, since the water inlet pipe 20 is a flexible pipe, in order to ensure the inclination angle of the water inlet pipe 20, an angle fixator 50 is provided along the inclined portion of the sheath pipe 10 for the water inlet pipe 20. The main body of the angle fixator 50 is sleeved on the heat shrinkable tube 30, and the water inlet pipe 20 passes through the secondary pipe of the angle fixator 50, thereby restricting the movement space of the water inlet pipe 20 and ensuring the inclination angle between the water inlet pipe 20 and the sheath pipe 10.

[0042] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0043] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments, as long as they meet the purpose of the present invention, and they should be within the scope of protection required by the present invention. For example: different combinations of the specific embodiments, different combinations of the distinguishing technical features.

Claims

1. A ureteral guide sheath, characterized in that: The invention comprises a sheath tube (10), at least one water inlet tube (20), and a heat shrink tube (30); the sheath tube (10) is a hollow structure; the sheath tube (10) and part of the water inlet tube (20) are sleeved in the heat shrink tube (30); the water inlet tube (20) and the sheath tube (10) form a multi-cavity structure; a first water outlet (21) is provided at one end of the water inlet tube (20) close to the water outlet of the water inlet tube (20); a second water outlet (31) is provided at one end of the heat shrink tube (30) close to the water outlet; the first water outlet (21) and the second water outlet (31) overlap and face away from the sheath tube (10); the first water outlet (21) comprises at least one water outlet hole; the water outlet hole and the second water outlet (31) are arranged along the length direction of the sheath tube (10).

2. The ureteral guide sheath according to claim 1, characterized in that: The cross section of the water inlet pipe (20) comprises a straight portion and a curved portion, the straight portion and the curved portion form a D-shape, and the straight portion is in contact with the sheath tube (10).

3. The ureteral guide sheath according to claim 1, characterized in that: The second water outlet portion (31) comprises an opening for exposing the water outlet hole.

4. The ureteral guide sheath according to claim 1, characterized in that: The water inlets of the plurality of water inlet pipes (20) are the same, and the water outlets are distributed along the circumference of the sheath tube (10).

5. The ureteral guide sheath according to claim 1, characterized in that: The inner wall of the water inlet pipe (20) is provided with reinforcing ribs (22) along the length direction of the water inlet pipe (20).

6. The ureteral guide sheath according to claim 5, characterized in that: There are a plurality of reinforcing ribs (22) in each water inlet pipe (20), and the plurality of reinforcing ribs (22) are arranged at intervals along the inner wall of the water inlet pipe (20) in the circumferential direction, with a first gap (23) formed between two adjacent reinforcing ribs (22).

7. The ureteral guide sheath according to claim 5 or 6, characterized in that: The reinforcing rib (22) is in the shape of a boss, and the upper surface of the reinforcing rib (22) is in the shape of an arc.

8. The ureteral guide sheath according to claim 5, characterized in that: The length of the reinforcing rib (22) is equal to the length of the water inlet pipe (20).

9. The ureteral guide sheath according to claim 1, characterized in that: One end of the sheath tube (10) away from the water outlet is connected to a Y-shaped connector (40), and the Y-shaped connector (40) comprises a main channel (41) and a branch channel (42). The main channel (41) is connected to the sheath tube (10) for insertion of an endoscope, and one end of the branch channel (42) is connected to the main channel (41), and the other end is connected to a negative pressure suction component. A sealing rubber ring is provided in the main channel (41), and a through hole matching the endoscope is provided on the sealing rubber ring.

10. The ureteral guide sheath according to claim 1, characterized in that: Another part of the water inlet pipe (20) is arranged along the outer surface of the sheath tube (10) and is inclined outwards.

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