Disposable flexible ureteroscope protective sheath

Abstract

The utility model discloses a disposable flexible ureteroscope protective sheath, which belongs to the technical field of medical appliances and comprises a bladder urethra section, a ureter section fixed at the end of the bladder urethra section and a negative pressure connector obliquely arranged on the outer side of the bladder urethra section, and an inner nut is mounted on the outer side of one end, far away from the ureter section, of the bladder urethra section in a threaded manner. A funnel cover plate is installed on the inner side of the end, away from the bladder urethra section, of the inner nut, and the narrow opening end of the funnel cover plate faces the interior of the bladder urethra section. The inner nut is installed at the end of the bladder urethra section in a threaded mode, the funnel cover plate is fixedly installed on the inner side of the inner nut, the inner diameter of the small end opening of the funnel cover plate is larger than that of the soft lens, and the hollow sealing ring is installed on the inner side of the funnel cover plate. The funnel cover plate is matched with the sealing film between the inner nut and the funnel cover plate and the air groove for use, so that the sealing degree can be controlled by controlling the rotation of the U-shaped inner nut in the use process, the operation is more convenient, and the operation time is saved.

Description

Technical Field

[0001] This utility model relates to protective sheaths, and in particular to disposable flexible ureteroscope protective sheaths, belonging to the field of medical device technology. Background Technology

[0002] A flexible endoscope protective sheath is typically a slender tubular structure consisting of a sheath tube and an interface. The sheath tube is the main part, and its length varies depending on the application and design, generally around 20-50 cm. It is used to wrap and protect the flexible endoscope. The interface is located at both ends of the sheath tube. One end is used to connect to the insertion part of the flexible endoscope and is usually designed with a sealing device to prevent liquid leakage and the entry of external contaminants. The other end may have an interface for connecting to other medical devices (such as infusion devices) to facilitate liquid infusion during surgery.

[0003] Existing technologies, such as the utility model application with application number 202321143882.8, disclose a disposable ureteroscope guide sheath. To address the issue that all currently available ureteroscope guide sheaths are of the same diameter throughout, regardless of whether a stone basket or negative pressure suction is used, stone fragments need to be guided through the guide sheath from the renal pelvis to the outside of the body, requiring passage through the entire ureter, bladder, and urethra. This involves a long path, necessitating repeated insertion and removal of the ureteroscope, which is time-consuming. The problem of time-consuming, physically demanding, and prolonged surgical time for patients can be addressed by setting the bladder urethral segment to be larger than the ureteral segment in diameter. This significantly shortens the path for stone removal or flushing out stone fragments during surgery. Stone fragments only need to be moved from the renal pelvis to or flushed to the vicinity of the ureteral orifice in the bladder (i.e., the anterior end of the bladder urethral segment). At this point, the diameter of the ureteroscope sheath is significantly increased, and the stone fragments are immediately flushed away and aspirated. The ureteroscope can then continue to enter the ureter and renal pelvis for repeated stone removal and flushing operations, significantly improving the efficiency of stone clearing and removal.

[0004] The above-mentioned applications still have shortcomings:

[0005] During the insertion and installation of the outer sheath, the sealing cap needs to be opened to allow the sheath core to be inserted. When using a flexible endoscope, the end needs to be sealed with the sealing cap. In emergency situations, medical staff may need to spend an extra few seconds controlling the sealing cap, which is detrimental to surgical procedures where every second counts.

[0006] To address these issues, a disposable ureteroscope protective sheath was designed. Utility Model Content

[0007] The main purpose of this invention is to provide a disposable protective sheath for a flexible ureteroscope, in order to solve the problems mentioned in the background art.

[0008] The objective of this utility model can be achieved by adopting the following technical solution:

[0009] The disposable flexible ureteroscope protective sheath includes a vesicourethral segment, a ureteral segment fixed to the end of the vesicourethral segment, and a negative pressure interface inclinedly disposed on the outside of the vesicourethral segment. An inner nut is threaded on the outer side of the end of the vesicourethral segment away from the ureteral segment. A funnel cover plate is installed on the inner side of the end of the inner nut away from the vesicourethral segment. The narrow end of the funnel cover plate faces the inside of the vesicourethral segment. An installation groove is formed circumferentially on the inner side of the funnel cover plate. A hollow sealing ring is installed inside the installation groove. An inflation component that communicates with the inside of the hollow sealing ring is provided on the funnel cover plate.

[0010] Preferably, the funnel cover plate has an annular protrusion at the outer edge of the open end, and the annular protrusion is fixedly connected to the inner wall of the bladder urethral segment. The inner side of the funnel cover plate has a straight passage near the narrow end, and the mounting groove is opened on the inner wall of the straight passage.

[0011] Preferably, the funnel cover plate has an annular protrusion at the outer edge of the open end, and the annular protrusion is fixedly connected to the inner wall of the bladder urethral segment. The inner side of the funnel cover plate has a straight passage near the narrow end, and the mounting groove is opened on the inner wall of the straight passage.

[0012] Preferably, the funnel cover plate has an annular protrusion at the outer edge of the open end, and the annular protrusion is fixedly connected to the inner wall of the bladder urethral segment. The inner side of the funnel cover plate has a straight passage near the narrow end, and the mounting groove is opened on the inner wall of the straight passage.

[0013] Preferably, the outer side of the inner nut away from the ureteral segment is provided with an arc-shaped protrusion along the circumference, and the outer side of the arc-shaped protrusion is provided with anti-slip texture.

[0014] Preferably, the outer side of the inner nut is provided with an indicator arrow along the circumferential direction, and the width of one end of the indicator arrow is greater than the width of the other end.

[0015] Preferably, the inflation assembly includes a sealing membrane and air grooves. The sealing membrane is fixed between the inner side of the inner nut and the outer wall of the funnel cover plate. The sealing membrane is parallel to the end face of the bladder urethra segment of the funnel cover plate. A sealing cavity is formed between the sealing membrane and the outer side of the funnel cover plate and the inner wall of the bladder urethra segment. Air grooves that communicate with the sealing cavity and the hollow sealing ring are evenly distributed inside the funnel cover plate.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. This utility model features an inner nut threaded onto the end of the bladder urethra, and a funnel-shaped cover plate fixedly installed inside the inner nut. The inner diameter of the small port of the funnel-shaped cover plate is larger than the inner diameter of the flexible endoscope. A hollow sealing ring is installed inside the funnel-shaped cover plate. Combined with the sealing membrane and air groove between the inner nut and the funnel-shaped cover plate, the sealing degree can be controlled by rotating the inner nut during use, making operation more convenient and saving operation time.

[0018] 2. This utility model has an indicator arrow on the outer side of the inner nut along the circumferential direction, which can determine the direction of tightening and loosening during the adjustment process, making it more practical. Attached Figure Description

[0019] Figure 1 This is a front sectional view of the present invention;

[0020] Figure 2 This is the front view of the present invention;

[0021] Figure 3 For the present utility model Figure 1 Enlarged view of point A in the middle;

[0022] Figure 4 This is a diagram of the funnel cover plate of this utility model.

[0023] In the diagram: 1. Bladder urethra segment; 2. Ureteral segment; 3. Negative pressure interface; 4. External thread; 5. Internal nut; 6. Funnel cover plate; 7. Mounting groove; 8. Hollow sealing ring; 9. Sealing membrane; 10. Air groove; 11. Indicator arrow. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0025] Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely to illustrate some embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0026] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0027] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0028] In the description of this utility model, it should be noted that the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. These terms are only for the convenience of describing this utility model and simplifying the description, and do not 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 on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0029] Example 1

[0030] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, this embodiment proposes a disposable ureteroscope protective sheath, including a bladder urethra segment 1, a ureter segment 2 fixed to the end of the bladder urethra segment 1, and a negative pressure interface 3 inclinedly disposed on the outside of the bladder urethra segment 1. An inner nut 5 is threadedly installed on the outer side of the end of the bladder urethra segment 1 away from the ureter segment 2. A funnel cover plate 6 is installed on the inner side of the end of the inner nut 5 away from the bladder urethra segment 1. The narrow end of the funnel cover plate 6 faces the inside of the bladder urethra segment 1. An installation groove 7 is circumferentially opened on the inner side of the funnel cover plate 6. A hollow sealing ring 8 is installed inside the installation groove 7. An inflation component communicating with the inside of the hollow sealing ring 8 is provided on the funnel cover plate 6.

[0031] The cystoscope is inserted into the bladder through the urethra to locate the ureteral opening. Then, a guidewire is slowly inserted into the ureter, usually to a depth exceeding the stone location or reaching the renal pelvis. Ureteral segment 2 is inserted into the ureter along the guidewire, and then the guidewire is withdrawn. The flexible ureteroscope is then inserted into the vesicourethral segment 1 and the ureteral segment 2. During insertion, the inner nut 5 is rotated to control the inflation assembly to inflate the hollow sealing ring 8. The hollow sealing ring 8 bulges out, and the inner side of the hollow sealing ring 8 fits tightly against the outer wall of the flexible ureteroscope to ensure a sealing effect during negative pressure stone aspiration.

[0032] Example 2

[0033] The following section provides a further description of the scheme in Example 1, focusing on its specific working method. See the description below for details:

[0034] like Figure 3 and Figure 4As shown, in a preferred embodiment, based on the above method, the funnel cover plate 6 is further provided with an annular protrusion at the outer edge of the open end, and the annular protrusion is fixedly connected to the inner wall of the bladder urethral segment 1. The inner side of the funnel cover plate 6 is provided with a straight passage near the narrow end, and the mounting groove 7 is opened on the inner wall of the straight passage.

[0035] During the insertion of the flexible endoscope, the conical design inside the funnel cover plate 6 makes it easier for the flexible endoscope to find the insertion port, making it more convenient to use.

[0036] like Figure 3 and Figure 4 As shown, in a preferred embodiment, based on the above method, the inner diameter of the hollow sealing ring 8 is the same as the inner diameter of the narrow end of the funnel cover plate 6, and the depth of the mounting groove 7 is the same as the end face diameter of the hollow sealing ring 8.

[0037] During the insertion of the flexible endoscope, since the inner diameter of the hollow sealing ring 8 is larger than the diameter of the flexible endoscope and is hidden inside the mounting groove 7, the hollow sealing ring 8 will not cause any interference to the insertion of the flexible endoscope.

[0038] like Figure 3 As shown, in a preferred embodiment, based on the above method, the outer side of the end of the bladder urethral segment 1 is provided with an external thread 4, and the bladder urethral segment 1 is threadedly connected to the inner nut 5 through the external thread 4.

[0039] During the rotation of the inner nut 5, the thumb and middle finger pinch the bladder urethra segment 1, and the index finger flicks to control the rotation of the inner nut 5.

[0040] like Figure 4 As shown, in a preferred embodiment, based on the above method, the inner nut 5 has a circumferentially arc-shaped protrusion on the outer side of the end away from the ureter segment 2, and the outer side of the arc-shaped protrusion has anti-slip texture.

[0041] The anti-slip texture increases the friction between the inner nut 5 and your fingers, making it easier to rotate the inner nut 5.

[0042] like Figure 4 As shown, in a preferred embodiment, based on the above method, the outer side of the inner nut 5 is further provided with an indicator arrow 11 along the circumferential direction, and the width of one end of the indicator arrow 11 is greater than the width of the other end.

[0043] Using the indicator arrow 11, the direction of seal rotation and the direction of loosening and release can be quickly observed, making operation more convenient.

[0044] like Figure 3As shown, in a preferred embodiment, based on the above method, the inflation assembly further includes a sealing membrane 9 and an air groove 10. The sealing membrane 9 is fixed between the inner side of the inner nut 5 and the outer wall of the funnel cover plate 6. The sealing membrane 9 is parallel to the end face of the bladder urethral segment 1 of the funnel cover plate 6. A sealing cavity is formed between the sealing membrane 9 and the outer side of the funnel cover plate 6 and the inner wall of the bladder urethral segment 1. The funnel cover plate 6 is uniformly provided with air grooves 10 that communicate with the sealing cavity and the hollow sealing ring 8.

[0045] During the process of rotating and tightening the inner nut 5, the end of the bladder urethral segment 1 will squeeze the sealing membrane 9. Since the sealing membrane 9 is deformable and is squeezed towards the inside of the sealing cavity, the gas inside the sealing cavity enters the interior of the hollow sealing ring 8 through the air groove 10. The hollow sealing ring 8 expands and contacts the inner wall of the flexible endoscope, sealing the outer side of the flexible endoscope with the inner side of the bladder urethral segment 1.

[0046] Example 3

[0047] The solutions in Embodiments 1 and 2 will be further described below with reference to their specific working methods.

[0048] The cystoscope is inserted into the bladder through the urethra to locate the ureteral opening. A guidewire is then slowly inserted into the ureter, typically deeper than the stone or reaching the renal pelvis. Ureteral segment 2 is inserted along the guidewire into the ureter, and then the guidewire is withdrawn. The flexible ureteroscope is then inserted through the open end of the funnel-shaped cover 6 into the bladder urethral segment 1 and the interior of ureteral segment 2. During insertion, the direction of the seal rotation is quickly observed using the indicator arrow 11. The thumb and middle finger pinch the bladder urethral segment 1, while the index finger controls the rotation of the inner nut 5. The end of the bladder urethral segment 1 compresses the sealing membrane 9. Because the sealing membrane 9 is deformable and is compressed towards the inside of the sealing cavity, the gas inside the sealing cavity enters the hollow sealing ring 8 through the air groove 10. The hollow sealing ring 8 expands and contacts the inner wall of the flexible endoscope, sealing the outer side of the flexible endoscope with the inner side of the bladder urethral segment 1. After the flexible endoscope insertion is complete, the negative pressure device is connected to the negative pressure interface 3 to remove the broken stone.

[0049] The above description is only a further embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the scope disclosed by the present utility model, based on the technical solution and concept of the present utility model, shall fall within the protection scope of the present utility model.

Claims

1. A disposable ureteroscope protective sheath, comprising a vesicourethral segment (1), a ureteral segment (2) fixed to the end of the vesicourethral segment (1), and a negative pressure inlet (3) obliquely disposed outside the vesicourethral segment (1), characterized in that: An inner nut (5) is threaded on the outer side of the end of the bladder urethra segment (1) away from the ureter segment (2). A funnel cover plate (6) is installed on the inner side of the end of the inner nut (5) away from the bladder urethra segment (1). The narrow end of the funnel cover plate (6) faces the inside of the bladder urethra segment (1). An installation groove (7) is provided on the inner side of the funnel cover plate (6) along the circumference. A hollow sealing ring (8) is installed inside the installation groove (7). An inflation component that communicates with the inside of the hollow sealing ring (8) is provided on the funnel cover plate (6).

2. The disposable ureteroscope protective sheath according to claim 1, characterized in that: The funnel cover plate (6) has an annular protrusion at the outer edge of the open end, and the annular protrusion is fixedly connected to the inner wall of the bladder urethral segment (1). The inner side of the funnel cover plate (6) is provided with a straight passage near the narrow end, and the mounting groove (7) is opened on the inner wall of the straight passage.

3. The disposable ureteroscope protective sheath according to claim 1, characterized in that: The inner diameter of the hollow sealing ring (8) is the same as the inner diameter of the narrow end of the funnel cover plate (6), and the depth of the mounting groove (7) is the same as the end face diameter of the hollow sealing ring (8).

4. The disposable ureteroscope protective sheath according to claim 1, characterized in that: The bladder urethral segment (1) has an external thread (4) on the outer side of its end, and the bladder urethral segment (1) is threadedly connected to the inner nut (5) through the external thread (4).

5. The disposable ureteroscope protective sheath according to claim 1, characterized in that: The inner nut (5) has an arc-shaped protrusion on the outer side of the end away from the ureter segment (2) along the circumference, and the outer side of the arc-shaped protrusion has anti-slip texture.

6. The disposable ureteroscope protective sheath according to claim 1, characterized in that: An indicator arrow (11) is provided on the outer side of the inner nut (5) along the circumferential direction, and the width of one end of the indicator arrow (11) is greater than the width of the other end.

7. The disposable flexible ureteroscope protective sheath according to any one of claims 1-6, characterized in that: The inflation assembly includes a sealing membrane (9) and an air groove (10). The sealing membrane (9) is fixed between the inner side of the inner nut (5) and the outer wall of the funnel cover plate (6). The sealing membrane (9) is parallel to the end face of the bladder urethral segment (1) of the funnel cover plate (6). A sealing cavity is formed between the sealing membrane (9) and the outer side of the funnel cover plate (6) and the inner wall of the bladder urethral segment (1). The funnel cover plate (6) is evenly provided with air grooves (10) that communicate with the sealing cavity and the hollow sealing ring (8).

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