Ureter guiding sheath

Abstract

The ureter guiding sheath comprises a sheath tube, at least one water inlet tube and a heat shrink tube, the sheath tube is of a hollow structure, the sheath tube and part of the water inlet tube are arranged in the heat shrink tube in a sleeved mode, the water inlet tube and the sheath tube form a multi-cavity structure, a first water outlet part is arranged at the end, close to a water outlet, of the water inlet tube, and a second water outlet part is arranged at the end, close to the water outlet, of the water inlet tube. A second water outlet part is arranged at the end, close to the water outlet, of the heat shrink tube, and the first water outlet part and the second water outlet part are overlapped and deviate from the sheath tube. By means of the mode, when the end of the ureter guiding sheath is bent, pressure of the end can be eliminated, and operation is more convenient.

Description

Technical Field

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

[0002] The guide sheath is a commonly used medical device in urology, mainly used for ureteroscopic lithotripsy. During ureteroscopic lithotripsy, the guide sheath first enters the patient's body and is directly passed near the lesion under imaging to assist the endoscope and other instruments in entering the lesion organ (kidney, gallbladder or ureter, etc.), providing a continuous operation channel for them, protecting the lesion organ when the instruments are repeatedly exchanged, reducing trauma to it, and protecting precision instruments from damage.

[0003] During ureteroscopic lithotripsy, the diseased organ is sometimes in a shriveled state, and physiological saline needs to be continuously injected to keep it filled. At the same time, the crushed stones need to be flushed and discharged in time. The first generation of guide sheaths has only one channel, which is required for both the entry of endoscopes and other instruments and the introduction of water inlet pipes to maintain the diseased organ in a filled state. This causes doctors to repeatedly replace instruments (observation requires replacement of endoscopes, and water inlet equipment requires replacement of water inlet equipment). To facilitate the doctor's operation, several improvement plans have appeared on the market: one is to update the instrument so that it has one or more of the functions of endoscopy, stone removal, and water inlet; the second is to add a water inlet channel to the guide sheath (for example, CN104644242A); the third is to set an expander at the end of the guide sheath (for example, CN219595583U). For the first method, since the size of the guide sheath cannot be too large (too large will cause too much trauma to the human body), the more integrated functions there are, the higher the requirements for the instrument, and it is not easy to control the pressure in the diseased organ during the doctor's repeated stone removal and stone removal process, which increases the difficulty of operation, and does not take into account the complex internal environment of the diseased organ, such as the kidney has multiple chambers, which often requires the guide sheath and other instrument ends to be able to turn; for the second method, due to the complex internal environment of the diseased organ, such as the kidney has multiple chambers, the guide sheath and other instrument ends are often required to be able to turn, and the simultaneous injection of water during the bending process will generate pressure at the bending part, resulting in difficulty in operation; for the third method, due to the complex internal environment of the diseased organ, such as the kidney has multiple chambers, it is difficult for the dilator to take into account multiple chambers and cannot adapt to complex environments. In other words, the several improved methods currently do not consider the need to bend the end of the guide sheath, resulting in difficulty in operation. Summary of the invention

[0004] In view of the shortcomings of the prior art, the object of the present invention is to provide a ureteral guide sheath to reduce the difficulty of operation.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a ureteral guide sheath, comprising a sheath tube, at least one water inlet tube, and a heat shrink tube, wherein the sheath tube is a hollow structure for passing an endoscope, the sheath tube and part of the water inlet tube are sleeved in the heat shrink tube, the water inlet tube and the sheath tube form a multi-cavity structure, a first water outlet portion is provided at one end of the water inlet tube close to the water outlet, a second water outlet portion is provided at one end of the heat shrink tube close to the water outlet, the first water outlet portion and the second water outlet portion overlap and face away from the sheath tube.

[0006] As an embodiment, the cross-section of the water inlet pipe includes 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.

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

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

[0009] As an embodiment, the inner wall of the water inlet pipe is provided with reinforcing ribs along the length direction of the water inlet pipe.

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

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

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

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

[0014] As an embodiment, another portion of the water inlet pipe is arranged to be inclined 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, the water inlet pipe is provided with an angle fixer along the inclined portion of the sheath tube.

[0017] Compared with the prior art, the above technical solution brings the following technical effects: The ureteral guide sheath of the present invention comprises a sheath tube, at least one water inlet tube, and a heat shrink tube, wherein the sheath tube is a hollow structure, wherein the sheath tube and part of the water inlet tube are sleeved in the heat shrink tube, wherein the water inlet tube and the sheath tube form a multi-cavity structure, wherein a first water outlet is provided at one end of the water inlet tube close to the water outlet, and a second water outlet is provided at one end of the heat shrink tube close to the water outlet, wherein the first water outlet and the second water outlet overlap and face away from the sheath tube. In the above manner, the present invention not only sets the water inlet tube and forms a multi-cavity structure with the sheath tube, but also opens a water outlet at the end of the water inlet tube, thereby eliminating the pressure at the end of the ureteral guide sheath when the end is bent, making operation more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 2 is a schematic structural diagram of the water outlet end of the ureteral guide sheath in an embodiment of the present invention; Figure 2 is an enlarged structural schematic diagram of the water outlet end of the ureteral guide sheath in an embodiment of the present invention; Figure 3 is another enlarged structural schematic diagram of the water outlet end of the ureteral guide sheath in an embodiment of the present invention; Figure 4 is a schematic diagram of the three-dimensional structure of a ureteral guide sheath in an embodiment of the present invention; Description of main component symbols: 10. Sheath; 20. Water inlet pipe; 30. Heat shrink tube; 21. First water outlet; 31. Second water outlet; 22. Reinforcement ribs; 23. First gap; 40. Y-type joint; 41. Main channel; 42. Branch channel; 50. Angle fixer. DETAILED DESCRIPTION

[0020] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0023] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0025] like Figure 1 to Figure 2As shown, the ureteral guide sheath of this embodiment includes 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, and the sheath tube 10 is used for passing machines such as endoscopes. At least one water inlet tube 20 is arranged around the sheath tube 10, and the water inlet tube 20 and the sheath tube 1 form a multi-cavity structure. The sheath tube 10 and part of the water inlet tube 20 are sleeved in the heat shrink tube 30, that is, part of the water inlet tube 20 is sleeved in the heat shrink tube 30, and the other part is exposed. A first water outlet 21 is arranged at one end of the water inlet tube 20 close to the water outlet, and a second water outlet 31 is arranged 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, that is, the water outlet direction of the first water outlet 21 does not point to the sheath tube 10, so as to facilitate the discharge of liquid. When the end of the ureteral guide sheath is not in a straight line, 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 21; when the end of the ureteral guide sheath is not in a bent state, most of the liquid flows out from the first water outlet 21, and a small amount of liquid flows out from the water outlet. In this way, the ureteral guide sheath can be bent at will, which can better adapt to various usage scenarios and reduce the difficulty of use. At present, after testing, it generally takes more than 3 hours for doctors to use the existing guide sheath for similar operations, and the use of the present invention can reduce the time by more than half.

[0026] The ureteral guide sheath of the present invention comprises a sheath tube, at least one water inlet tube, and a heat shrink tube, wherein the sheath tube is a hollow structure, wherein the sheath tube and part of the water inlet tube are sleeved in the heat shrink tube, wherein the water inlet tube and the sheath tube form a multi-cavity structure, wherein a first water outlet is provided at one end of the water inlet tube close to the water outlet, and a second water outlet is provided at one end of the heat shrink tube close to the water outlet, wherein the first water outlet and the second water outlet overlap and face away from the sheath tube. In the above manner, the present invention not only sets the water inlet tube and forms a multi-cavity structure with the sheath tube, but also opens a water outlet at the end of the water inlet tube, thereby eliminating the pressure at the end of the ureteral guide sheath when the end is bent, making operation more convenient.

[0027] In one embodiment, in order to better open a hole on the first water outlet, an opening may be firstly made on one end of the heat shrink tube 30 close to the water outlet of the ureteral guide sheath, and then after heat shrinking, a hole may be opened on one end of the water inlet pipe 20 close to the water outlet, so that the first water outlet 21 includes at least one water outlet hole, and the second water outlet 31 includes an opening for exposing the water outlet hole. In a specific implementation, an opening may not be made on one end of the heat shrink tube 30 close to the water outlet of the ureteral guide sheath, and after heat shrinking, a hole may be opened on one end of the water inlet pipe 20 and the heat shrink tube 30 close to the water outlet.

[0028] In one embodiment, the water inlets of the plurality of water inlet pipes 20 are the same, and the water outlets are distributed circumferentially along the sheath tube 10. In this way, the plurality of water inlet pipes 20 are distributed circumferentially along the sheath tube 10, and each water inlet pipe 20 is provided with a water outlet, so that the water outlet effect can be guaranteed regardless of the ureteral guide sheath being bent at any angle.

[0029] In one embodiment, continue to refer to Figure 1 and Figure 2 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. Providing the reinforcing ribs 22 in the water inlet pipe 20 can effectively avoid the situation where the reinforcing ribs 22 first contact the wall of the water inlet pipe 20 when bending, while other parts remain unobstructed, thereby avoiding the situation where the water inlet pipe is blocked due to bending. In one embodiment, if the number of 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 tube 10 and the center of the water inlet pipe 20 are located (the center of the sheath tube 10, the center of the water inlet pipe 20, and the midpoint of the cross section of the reinforcing rib 22 are located on the same straight line). At this time, since the diameter of the sheath tube 10 is larger than the diameter of the water inlet pipe 20, no matter how the sheath tube 10 is bent, the water inlet pipe 20 will not be crushed (if the sheath tube 10 is bent along a first direction, the first direction is perpendicular to the straight line where the center of the sheath tube 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 shrink tube 30 when bending, the curvature of the water inlet pipe 20 will be smaller than that of the sheath tube 10). This can ensure to the greatest extent that the channel of the water inlet pipe 20 will not be blocked.

[0030] In one embodiment, continue to refer to Figure 2 There are multiple reinforcing ribs 22 in each water inlet pipe 20, and the multiple reinforcing ribs 22 are arranged at intervals along the circumference of the inner wall of the water inlet pipe 20, and a first gap 23 is formed between two adjacent reinforcing ribs 22. The first gap 23 is mainly set to ensure that the water inlet pipe 20 can be bent without affecting the use of the bent state.

[0031] In one embodiment, continue to refer to Figure 2 The reinforcing rib 22 is convex, 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, and when multiple reinforcing ribs 22 are bent, multiple reinforcing ribs 22 are close to each other, and a channel can be formed in the middle to ensure water inflow. In the specific implementation, the reinforcing rib 22 can also be other shapes, such as rectangular or square cross sections. In the present application, the water inlet pipe 20 can be circular, of course, it can be other shapes, such as Figure 3As shown, as another embodiment, the water inlet pipe 20 is D-shaped, and the water inlet pipe 20 includes a straight part combined with a curved part, and the two sides of the straight part and the curved part are connected end to end, so that the cross-section is D-shaped, and the straight part is in contact with the sheath (10). If the overall size of the ureteral guide sheath remains unchanged, the water inlet pipe 20 is D-shaped compared to the circular one, and the diameter of the sheath 10 can be relatively larger, which is more convenient for doctors to perform surgical operations; if the diameter of the sheath 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 guide sheath can be made smaller, so that the human body is less traumatic and more conducive to recovery.

[0032] 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 portion of the ureteral guide sheath will be bent during normal use, so the reinforcing rib 22 can be provided only on the portion of the water inlet pipe 20 near the water outlet. The length of the reinforcing rib 22 is equal to the length of the water inlet pipe 20 to avoid accidents caused by abnormal use due to other reasons, resulting in other parts being bent.

[0033] In one embodiment, see Figure 4 The end of the sheath tube 10 away from the water outlet is connected to the Y-type connector 40, and the Y-type connector 40 includes a main channel 41 and a branch channel 42. The main channel 41 is connected to the sheath tube 10 for the insertion of instruments such as an endoscope. 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 (not shown). A sealing rubber ring (not shown) is provided in the main channel 41, and a through hole matching the endoscope is provided on the sealing rubber ring. The stone removal instrument penetrates the sheath tube 10 from the main channel 41, and after the stone is taken out, the negative pressure suction component sucks the liquid and the stone out of the branch channel 42. The sealing rubber ring is provided with a through hole matching the endoscope to prevent leakage and air from entering the branch channel 42 from the main channel 41, which affects the negative pressure suction component from sucking the liquid and the stone out of the branch channel 42.

[0034] In one embodiment, see Figure 4 In order to facilitate the water inlet pipe 20 to communicate with the external liquid, another part of the water inlet pipe 20 is arranged to be inclined 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°, which can ensure that the water inlet pipe 20 will not be bent and flattened, ensure the water inlet effect, and facilitate the water inlet pipe 20 to communicate with the external liquid.

[0035] In one embodiment, see Figure 4Since the water inlet pipe 20 is a flexible pipe, in order to ensure the inclination angle of the water inlet pipe 20, the water inlet pipe 20 is provided with an angle fixer 50 at the inclination position of the sheath tube 10. The main body of the angle fixer 50 is sleeved on the heat shrink tube 30, and the water inlet pipe 20 passes through the auxiliary pipe of the angle fixer 50, thereby limiting the activity space of the water inlet pipe 20 and ensuring the inclination angle between the water inlet pipe 20 and the sheath tube 10.

[0036] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0037] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may make changes, modifications, substitutions and variations to the above embodiments. As long as they conform to the purpose of the present invention, they shall be within the scope of protection required by the present invention, such as different combinations of specific embodiments and different combinations of 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 portion (21) is provided at one end of the water inlet tube (20) close to the water outlet; a second water outlet portion (31) is provided at one end of the heat shrink tube (30) close to the water outlet; the first water outlet portion (21) and the second water outlet portion (31) overlap and face away from 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 first water outlet portion (21) comprises at least one water outlet hole, and 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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