Ureter guiding sheath

Abstract

The ureter guiding sheath comprises a sheath tube, at least one water inlet channel and a heat shrink tube, the sheath tube is of a hollow structure, a spring is arranged in the sheath tube, the distance between adjacent spring rings between the two ends of the spring is 0.14 mm-0. 46 mm, part of the water inlet channel is embedded into a gap between the adjacent spring rings, and the heat shrink tube is arranged between the water inlet channel and the heat shrink tube. The sheathing canal is arranged in the heat shrink tube in a sleeved mode, and the water inlet channel and the sheathing canal form a multi-cavity structure. In this way, the water inlet channel can be kept and cannot be blocked.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and in particular to a ureteral guiding sheath. Background Technology

[0002] A guide sheath is a commonly used medical device in urology, mainly used in ureteroscopic lithotripsy. The guide sheath is inserted into the patient's body first and then into the vicinity of the lesion site to assist the endoscope and other instruments in entering the lesion organ (kidney, gallbladder, or ureter, etc.), providing a continuous operating channel. It can protect the ureter and reduce trauma to it when instruments are repeatedly exchanged, while also protecting delicate instruments from damage.

[0003] During ureteroscopic lithotripsy, the affected organ is sometimes deflated, requiring continuous infusion of saline solution to keep it full. Current guide sheaths consist of a sheath tube and a water inlet channel. The sheath tube facilitates the surgeon's operation, and the broken stones need to be flushed and drained promptly. The water inlet channel is used to introduce water into the affected organ to keep it full. Due to the complex internal environment of the affected organ and external environmental factors during actual operation, the guide sheath needs to be in a bent position. Currently, guide sheaths mainly add a spring inside the sheath tube (the tubing for instruments and stone fragments) to ensure the sheath can bend without being crushed, but the issue of whether the water inlet channel is crushed or blocked is not addressed. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a ureteral guide sheath that solves the problem that the water inlet channel is prone to bending, collapsing and blockage, and the water flow cannot be guaranteed in the existing technology.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a ureteral guiding sheath, comprising a sheath tube, at least one water inlet channel, and a heat shrink tubing. The sheath tube has a hollow structure, and a spring is provided inside the sheath tube. The distance between adjacent spring coils at both ends of the spring is 0.14mm-0.46mm. Part of the water inlet channel is embedded in the gap between adjacent spring coils. The sheath tube is sleeved inside the heat shrink tubing, and the water inlet channel and the sheath tube form a multi-cavity structure.

[0006] In one embodiment, the wall of the water inlet channel is provided with reinforcing ribs along the length of the water inlet channel.

[0007] In one embodiment, there are multiple reinforcing ribs, which are spaced apart circumferentially along the inner wall of the water inlet channel, and a first gap is formed between two adjacent reinforcing ribs.

[0008] In one embodiment, the reinforcing rib is boss-shaped, and the upper surface of the reinforcing rib is arc-shaped.

[0009] In one embodiment, the length of the reinforcing rib is equal to the length of the water inlet channel.

[0010] In one embodiment, the inlets of the multiple water inlet channels are identical, and the outlets are distributed circumferentially along the sheath.

[0011] In one embodiment, the end of the sheath away from the outlet is connected to a Y-shaped connector. The Y-shaped connector includes a main channel and a branch channel. The main channel is connected to the sheath for endoscope insertion. One end of the branch channel is connected to the main channel, and the other end is connected to the negative pressure suction assembly. A sealing ring is provided in the main channel, and a through hole matching the endoscope is opened on the sealing ring.

[0012] In one embodiment, the first end of the water inlet channel is embedded in the outer wall of the distal sheath and is flush with the distal sheath, and the second end of the water inlet channel is inclined outward along the outer surface of the proximal sheath.

[0013] In one embodiment, the inclination angle between the water inlet channel and the proximal sheath is 20°-30°.

[0014] In one embodiment, an angle retainer is provided along the inclined section of the water inlet channel, and the second end of the water inlet channel passes through the angle retainer and is fixed by the angle retainer.

[0015] In one embodiment, the end of the water inlet channel near the proximal sheath is connected to an external irrigation channel via a connector.

[0016] Compared to existing technologies, the above technical solution brings the following technical effects:

[0017] This utility model relates to a ureteral guiding sheath, comprising a sheath tube, at least one inlet channel, and a heat-shrink tubing. The sheath tube has a hollow structure, and a spring is installed inside the sheath tube. The distance between adjacent spring coils at both ends of the spring is 0.1mm-0.46mm. Part of the inlet channel is embedded in the gap between adjacent spring coils. The sheath tube is sleeved inside the heat-shrink tubing, and the inlet channel and the sheath tube form a multi-cavity structure. Through this method, this utility model provides a separate inlet channel, which is inserted into the gap between the spring coils of the sheath tube. Because the spring can support the sheath tube regardless of how it bends during use, the inlet channel inserted into the gap between the spring coils of the sheath tube is not easily flattened, thus preventing blockage. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the water outlet end of the ureteral guide sheath of this utility model;

[0020] Figure 2 This is a perspective view of the internal structure of the ureteral guiding sheath in an embodiment of the present invention;

[0021] Figure 3 This is an enlarged structural schematic diagram of the water outlet end of the ureteral guide sheath in an embodiment of the present invention;

[0022] Figure 4 This is a three-dimensional structural schematic diagram of the ureteral guiding sheath in an embodiment of the present invention;

[0023] Explanation of key component symbols:

[0024] 1. Sheath; 2. Inlet channel; 3. Heat shrink tubing; 11. Spring; 21. Reinforcing rib; 4. First gap; 5. Y-type connector; 51. Main channel; 52. Branch channel; 6. Angle retainer; 7. Connector. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein 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 with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0026] In the description of this utility model, it should be understood that 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., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0030] like Figures 1 to 3 As shown, the ureteral guiding sheath of this embodiment includes a sheath tube 1, at least one inlet channel 2, and a heat-shrink tubing 3. The sheath tube 1 has a hollow structure and is used for the passage of instruments such as endoscopes. At least one inlet channel 2 is provided on the outer wall of the sheath tube 1. A spring is provided inside the sheath tube 1, and the distance H between adjacent spring coils at both ends of the spring is 0.14mm-0.46mm. Part of the inlet channel 2 is embedded in the gap between adjacent spring coils. During the manufacturing process, the inlet channel 2 is first inserted into the spring 11, then the assembled spring 11 and inlet channel 2 are placed in a mold, and liquid material of the sheath tube 1 is poured in. After cooling, the heat-shrink tubing 3 is fitted in for heat shrinking, thus obtaining the ureteral guiding sheath.

[0031] In this application, a portion of the inlet channel 2 is located inside the sheath 1, meaning the sheath 1 and part of the inlet channel 2 are fitted inside the heat-shrink tubing 3, while the remaining portion of the inlet channel 2 is exposed. The inlet channel 2 and the sheath 1 form a multi-cavity structure. One end of the inlet channel 2 and the sheath 1 fitted inside the heat-shrink tubing 3 is the outlet, and the other end (the end where the exposed portion of the inlet channel 2 is located) is the inlet. The inlet connects to an external liquid storage device. During use, the liquid in the storage device enters the affected organ through the inlet and outlet. Regardless of how the ureteral guiding sheath bends during use, the presence of the spring increases the curvature of the bend. Therefore, the inlet channel, which is inserted into the gap between the spring coils of the sheath, is not easily flattened, preventing blockage.

[0032] This utility model relates to a ureteral guiding sheath, comprising a sheath tube, at least one inlet channel, and a heat-shrink tubing. The sheath tube has a hollow structure, and a spring is installed inside the sheath tube. The distance between adjacent spring coils at both ends of the spring is 0.1mm-0.46mm. Part of the inlet channel is embedded in the gap between adjacent spring coils. The sheath tube is sleeved inside the heat-shrink tubing, and the inlet channel and the sheath tube form a multi-cavity structure. Through this method, this utility model provides a separate inlet channel, which is inserted into the gap between the spring coils of the sheath tube. Because the spring can support the sheath tube regardless of how it bends during use, the inlet channel inserted into the gap between the spring coils of the sheath tube is not easily flattened, thus preventing blockage.

[0033] In one embodiment, reinforcing ribs 21 are provided on the inner wall of the water inlet channel 2 along its length. Thus, during use, no matter how the ureteral guide sheath bends, the reinforcing ribs 21 can keep the water inlet channel 2 open as it bends with the ureteral guide sheath, thereby ensuring that the water inlet channel 2 is difficult to be crushed. Even if it is crushed, the presence of the reinforcing ribs can maintain part of the channel and prevent blockage.

[0034] In this embodiment, the reinforcing ribs on the inner wall of the water inlet channel are relatively difficult to be crushed. Even if they are crushed, the presence of the reinforcing ribs can maintain part of the channel and prevent blockage.

[0035] In one embodiment, the inlets of the multiple water inlet channels 2 are the same, and the outlets are distributed circumferentially along the sheath tube 1. Thus, multiple water inlet channels 2 are distributed circumferentially along the sheath tube 1, and each water inlet channel 2 is provided with an outlet, so that the water output effect can be guaranteed no matter how the ureteral guide sheath is bent at any angle.

[0036] In one embodiment, see further. Figure 1 , Figure 2 and Figure 3There are multiple reinforcing ribs 21, which are spaced apart circumferentially along the inner wall of the water inlet channel 2. A first gap 4 is formed between two adjacent reinforcing ribs 21 (the first gap 4 is to avoid the water inlet channel 2 being too thick, which would hinder bending and affect its use). 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 diameter of the sheath tube 10, and the reinforcing rib 22 is located on the plane where the center of the sheath tube 10 and the center of the water inlet channel 20 are located (the center of the sheath tube 10, the center of the water inlet channel 20, and the midpoint of the cross section of the reinforcing rib 22 are on the same straight line). At this time, no matter how the sheath tube 10 is bent, the water inlet channel 20 will not be crushed (if the sheath tube 10 is bent along the straight line where the center of the sheath tube 10, the center of the water inlet channel 20, and the reinforcing rib 22 are located (i.e., the sheath tube 10 is bent along the width direction of the reinforcing rib 22), the reinforcing rib 22 can support the water inlet channel 20 from being flattened, thus ensuring that the water inlet channel 20 is not blocked to the greatest extent.

[0037] In one embodiment, the reinforcing rib 21 is boss-shaped, and the upper surface of the reinforcing rib 21 is arc-shaped (e.g., Figure 2 As shown, its cross-section is similar to a trapezoid (the difference being that the upper surface is arc-shaped). When multiple reinforcing ribs 21 are bent, they approach each other, and a channel can be formed in the middle to ensure water inflow. In specific implementations, the reinforcing ribs 21 can also be other shapes, such as rectangular or square cross-sections.

[0038] In one embodiment, the length of the reinforcing rib 21 is equal to the length of the inlet channel 2. In practice, only the outlet portion of the ureteral guiding sheath typically bends during normal use; therefore, the reinforcing rib 22 can be installed only on the portion of the inlet channel 20 near the outlet. The fact that the length of the reinforcing rib 22 is equal to the length of the inlet channel 20 prevents unexpected situations caused by other factors leading to bending of other parts during abnormal use.

[0039] Understandably, the inner diameter of the sheath 1 is larger than the outer diameter of instruments such as endoscopes to facilitate instrument insertion and removal. It should be noted that there is only one inlet channel 2. If the ureteral guide sheath has a large curvature (curvature greater than or equal to 90°), the inlet channel 2 may be flattened (the probability of flattening is highest when the inlet channel 2 is located in the curvature direction). In this case, flattening can be avoided by setting reinforcing ribs 21 in the inlet channel 2; or, if the ureteral guide sheath has a large curvature (curvature greater than or equal to 90°), multiple inlet channels 2 can be provided to prevent flattening (the curvature of inlet channels 2 at different locations will vary, and not all inlet channels 2 will be flattened).

[0040] In one embodiment, see Figure 3The end of the sheath 1 furthest from the outlet is connected to a Y-shaped connector 5. The Y-shaped connector 5 includes a main channel 51 and a branch channel 52. The main channel 51 is connected to the sheath 1 for insertion of instruments such as endoscopes. One end of the branch channel 52 is connected to the main channel 51, and the other end is connected to a negative pressure suction component (not shown). A sealing ring (not shown) is provided inside the main channel 51, and a through hole matching the endoscope is opened on the sealing ring. The stone retrieval instrument is inserted into the sheath 1 through the main channel 51. After the stone is removed, the negative pressure suction component draws the liquid and stone out through the branch channel 52. The through hole on the sealing ring, matching the endoscope, prevents leakage and air from entering the branch channel 52 from the main channel 51, which would affect the negative pressure suction component's ability to draw the liquid and stone out through the branch channel 52.

[0041] In one embodiment, one end of the water inlet channel 2 is flush with the distal sheath 1, and the other two ends of the water inlet channel 2 are inclined outward along the outer surface of the proximal sheath 1 to facilitate communication between the water inlet channel 2 and the external liquid.

[0042] In one embodiment, the inclination angle between the water inlet channel 2 and the proximal sheath 1 is 20°-30°. This ensures that the water inlet channel 2 will not be bent or flattened, thus guaranteeing the water intake effect, and also facilitates the connection between the water inlet channel 2 and external liquid storage equipment.

[0043] In one embodiment, since the water inlet channel 2 is a flexible tube, in order to ensure the tilt angle of the water inlet channel 2, an angle fixer 6 is provided along the tilt of the sheath tube 1. The main body of the angle fixer 6 is sleeved on the heat shrink tube 3, and the other end of the water inlet channel 2 passes through the secondary tube of the angle fixer 6, thereby restricting the movement space of the water inlet channel 2 and ensuring the tilt angle between the water inlet channel 2 and the sheath tube 1.

[0044] In one embodiment, the end of the water inlet channel 2 near the proximal sheath 1 is connected to an external liquid storage device via a connector 7.

[0045] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0046] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled 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 all such changes should be within the scope of protection claimed by the present invention. For example, different combinations of specific embodiments and different combinations of distinguishing technical features.

Claims

1. A ureteral guiding sheath, characterized in that, It includes a sheath (1), at least one water inlet channel (2), and a heat shrink tube (3). The sheath (1) is a hollow structure. A spring (11) is provided inside the sheath (1). The distance between adjacent spring coils between the two ends of the spring (11) is 0.14mm-0.46mm. Part of the water inlet channel (2) is embedded in the gap between adjacent spring coils. The sheath (1) is sleeved inside the heat shrink tube (3). The water inlet channel (2) and the sheath (1) form a multi-cavity structure.

2. The ureteral guiding sheath according to claim 1, characterized in that, The inner wall of the water inlet channel (2) is provided with reinforcing ribs (21) along the length of the water inlet channel (2).

3. The ureteral guiding sheath according to claim 2, characterized in that, The reinforcing ribs (21) are multiple, and the multiple reinforcing ribs (21) are arranged circumferentially along the inner wall of the water inlet channel (2), and a first gap (4) is formed between two adjacent reinforcing ribs (21).

4. The ureteral guiding sheath according to claim 3, characterized in that, The reinforcing rib (21) is in the shape of a boss, and the upper surface of the reinforcing rib (21) is arc-shaped.

5. The ureteral guiding sheath according to claim 1, characterized in that, The inlets of the multiple water inlet channels (2) are the same, and the outlets are distributed circumferentially along the sheath (1).

6. The ureteral guiding sheath according to claim 1, characterized in that, The end of the sheath (1) away from the outlet is connected to a Y-type connector (5). The Y-type connector (5) includes a main channel (51) and a branch channel (52). The main channel (51) is connected to the sheath (1) for endoscope insertion. One end of the branch channel (52) is connected to the main channel (51), and the other end is connected to the negative pressure suction assembly. A sealing ring is provided in the main channel (51), and a through hole matching the endoscope is opened on the sealing ring.

7. The ureteral guiding sheath according to claim 6, characterized in that, The first end of the water inlet channel (2) is embedded on the outer wall of the distal sheath (1) and is flush with the distal sheath (1). The second end of the water inlet channel (2) is inclined outward along the outer surface of the proximal sheath (1).

8. The ureteral guiding sheath according to claim 5, characterized in that, The inclination angle between the water inlet channel (2) and the proximal sheath (1) is 20°-30°.

9. The ureteral guiding sheath according to claim 5, characterized in that, An angle fixer (6) is provided at the inclined part of the water inlet channel (2) along the sheath (1). The second end of the water inlet channel (2) passes through the angle fixer (6) and is fixed by the angle fixer (6).

10. The ureteral guiding sheath according to claim 5, characterized in that, The end of the water inlet channel (2) near the proximal sheath (1) is connected to the external irrigation channel via a connector (7).

Images