Ureteral guide sheath

Abstract

The utility model discloses a ureter guide sheath relates to medical instrument technical field, including the outer tube body, be provided with working chamber and liquid sending chamber in the outer tube body, and working chamber and liquid sending chamber are parallel, one end of outer tube body is installed with operating handle, and operating handle includes connecting section and spacing platform, one end of connecting section communicates with the outer tube body, and the other end of connecting section communicates with spacing platform, and be provided with negative pressure passage and liquid injection channel on the lateral wall of connecting section, and negative pressure passage communicates with working chamber, and liquid injection channel communicates with liquid sending chamber. By this, through the combination use of liquid sending chamber and working chamber, the doctor can inject liquid preparation for treatment or adjuvant therapy into the patient's body simultaneously in the examination and treatment process for the patient, and the problem that needs to switch medical instruments in the prior art is solved.

Description

Technical Field

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

[0002] A ureteral guiding sheath is an auxiliary instrument used in ureteral surgery, typically consisting of an inner tube, an outer tube, and a handle. It provides a stable channel for instruments such as ureteroscopes, guidewires, and catheters, facilitating their smooth entry into the ureter. It is commonly used in the diagnosis and treatment of ureteral stones, ureteral strictures, and ureteral tumors, such as ureteroscopy, ureteral stent implantation, and ureteral stone fragmentation and removal.

[0003] Existing ureteral guiding sheaths generally consist of a sheath tube, a sheath core, and a handle. The handle is installed at one end of the sheath tube and includes a negative pressure suction interface and an inlet. The sheath core is inserted into the sheath tube through the inlet. The end of the sheath core furthest from the handle is a smooth cone shape, and this end is exposed outside the sheath tube. Its function is to dilate the ureter to facilitate the insertion of the sheath tube.

[0004] During use, the patient needs to keep the bladder full. Then, the guide sheath is inserted into the ureter along the pre-inserted guide wire. The sheath core is then removed, and instruments such as the flexible ureteroscope, endoscope, laser fiber, and operating cable are then inserted into the ureter along the guide sheath. At the same time, the negative pressure suction interface is connected to the negative pressure device to facilitate the suction of stones by the negative pressure device.

[0005] Because negative pressure equipment removes fluid from the patient's bladder along with the lithotripsy, if the extraction speed is too fast, it can lead to insufficient pressure later, making it difficult to remove the stones. In this case, instruments such as the ureteroscope, endoscope, laser fiber, and operating cables need to be removed, and then normal saline is added to the patient's bladder. This procedure is extremely time-consuming and laborious, and also causes significant discomfort for the patient. Utility Model Content

[0006] To address the above-mentioned shortcomings, the purpose of this utility model is to provide a ureteral guidance sheath, which aims to solve the problem that the existing guidance sheaths have a relatively simple structure and are difficult to replenish fluids to the patient at any time during surgery.

[0007] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0008] A ureteral guiding sheath includes an outer tube body, within which a working chamber and a delivery chamber are disposed, the working chamber and the delivery chamber being parallel to each other; an operating handle is installed at one end of the outer tube body, the operating handle including a connecting section and a limiting platform, one end of the connecting section communicating with the outer tube body, the other end of the connecting section communicating with the limiting platform, a negative pressure channel and an injection channel being disposed on the side wall of the connecting section, the negative pressure channel communicating with the working chamber, and the injection channel communicating with the delivery chamber.

[0009] An isolation membrane is provided between the working chamber and the liquid delivery chamber.

[0010] The isolation membrane is arc-shaped, with its concave surface facing the working chamber and its convex surface facing the liquid delivery chamber.

[0011] The volume of the working chamber is larger than the volume of the liquid delivery chamber.

[0012] The inner volume of the outer tube is denoted as 'a', and the volume of the working chamber is greater than or equal to 'a'. The volume of the liquid delivery chamber is less than or equal to .

[0013] The working chamber contains an expansion core, and a conical expansion platform is provided at the end of the expansion core away from the operating handle. A locking platform is provided at the end of the expansion core away from the conical expansion platform. The locking platform is connected to a limiting platform. A wire-leading hole is provided inside the expansion core. The axis of the wire-leading hole coincides with the axis of the expansion core, and the wire-leading hole penetrates through the expansion core.

[0014] The limiting platform has a limiting cavity inside, and a positioning ring platform is provided at the end of the limiting cavity away from the connecting section. The side wall of the positioning ring platform is provided with external threads. The locking platform includes a top cover and an annular platform. The annular platform of the top cover is located at the end of the top cover facing the positioning ring platform. The inner wall of the annular platform is provided with internal threads. The annular platform is threadedly connected to the positioning ring platform. The expansion core is connected to the end of the top cover facing the positioning ring platform.

[0015] An auxiliary platform is provided at the end of the top cover away from the expansion core, and an auxiliary ring is installed on the top of the auxiliary platform.

[0016] The limiting cavity is equipped with an intercepting soft membrane, and the central area of ​​the intercepting soft membrane is provided with a cross-shaped opening, through which the expansion core passes.

[0017] The limiting platform has a drainage pipe installed on its side wall, with one end of the drainage pipe located between the intercepting membrane and the positioning ring platform.

[0018] After adopting the above technical solution, the beneficial effects of this utility model are:

[0019] By combining the delivery chamber and the working chamber, doctors can simultaneously inject liquid preparations for treatment or adjuvant therapy into patients during examinations and treatments, solving the problem of needing to switch medical devices in existing technologies. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the ureteral guiding sheath.

[0021] Figure 2 This is a top sectional view of the outer tube.

[0022] Figure 3 This is a structural diagram of a conical expansion stage;

[0023] Figure 4 Here is a structural diagram of the limiting stage;

[0024] Figure 5 A structural diagram of the expanded core;

[0025] Figure 6 A top view of the intercepting membrane;

[0026] Figure 7 A schematic diagram illustrating the action of the intercepting membrane during the delivery of a medical device;

[0027] Figure 8 A schematic diagram illustrating the action of the intercepting membrane during the removal of a medical device;

[0028] Figure 9 This is a structural diagram of the connecting segment;

[0029] Figure 10 This is a bottom view of the outer tube.

[0030] Figure 11 This is a structural diagram of the conical expansion stage in Example 2;

[0031] Figure 12 This is a structural diagram of the conical expansion stage in Example 3.

[0032] In the diagram: 1-Outer tube body, 2-Working chamber, 3-Liquid delivery chamber, 4-Operating handle, 5-Limiting platform, 51-Limiting chamber, 6-Connecting section, 7-Negative pressure channel, 8-Liquid injection channel, 9-Expansion core, 90-Wire guide hole, 10-Conical expansion platform, 11-Clamping platform, 12-Top cover, 13-Annular platform, 14-Isolation membrane, 15-Positioning ring platform, 16-Auxiliary platform, 17-Auxiliary ring, 18-Interception membrane, 19-Cross opening, 20-Drainage pipe, 21-One-way valve, 22-Flow rate control module, 23-Adapter, 24-Supporting frustum, 25-Arc-shaped positioning groove, 26-Protective plate, 27-Side hole. Detailed Implementation

[0033] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0034] Example 1:

[0035] like Figure 1-5 As shown, a ureteral guiding sheath includes an outer tube body 1. In order to facilitate the simultaneous stone removal and fluid injection of the guiding sheath in this design, a working chamber 2 and a fluid delivery chamber 3 are provided inside the outer tube body 1, and the working chamber 2 and the fluid delivery chamber 3 are parallel.

[0036] The working chamber 2 is used to house instruments such as the endoscope, laser fiber, and operating cables. The purpose of the fluid delivery chamber 3 is twofold: first, during laser lithotripsy, saline solution is delivered into the patient's bladder through the fluid delivery chamber 3 to prevent insufficient fluid in the bladder, which could hinder stone removal; second, when using the endoscope to examine the affected area, liquid medications can be directly delivered to the affected area through the fluid delivery chamber 3, thus optimizing the treatment process.

[0037] For ease of operation, an operating handle 4 is installed at one end of the outer tube 1. The operating handle 4 includes a connecting section 6 and a limiting platform 5. One end of the connecting section 6 is connected to the outer tube 1, and the other end of the connecting section 6 is connected to the limiting platform 5. A negative pressure channel 7 and an injection channel 8 are provided on the side wall of the connecting section 6. The negative pressure channel 7 is connected to the working chamber 2, and the injection channel 8 is connected to the delivery chamber 3.

[0038] The connecting section 6 supports the limiting platform 5 and also assists in connecting the limiting platform 5 to the outer tube 1. The limiting platform 5 is used to install medical devices waiting to be inserted into the outer tube 1, and also provides a convenient grip for the operator.

[0039] To facilitate the removal of broken particles during lithotripsy, this solution introduces a negative pressure channel 7. One end of the negative pressure channel 7 is connected to the working chamber 2, and the other end of the negative pressure channel 7 is connected to a negative pressure device.

[0040] In order to facilitate the delivery of liquid into the patient's body, an injection channel 8 is also installed on the side wall of the connecting section 6. The end of the injection channel 8 away from the connecting section 6 is connected to a syringe or injection pump.

[0041] like Figure 4 , Figure 5As shown, to facilitate the insertion of the outer catheter 1 into the patient's body, an expansion core 9 is provided within the working chamber 2. A conical expansion platform 10 is located at the end of the expansion core 9 furthest from the operating handle 4, and a retaining platform 11 is located at the end of the expansion core 9 furthest from the conical expansion platform 10. The retaining platform 11 is connected to the limiting platform 5. A guide wire hole 90 is provided inside the expansion core 9, and the axis of the guide wire hole 90 coincides with the axis of the expansion core 9. The length direction of the guide wire hole 90 is the same as the length direction of the expansion core 9, and the guide wire hole 90 penetrates the expansion core 9. Therefore, in use, the pre-embedded wire is first inserted into the guide wire hole 90, and then the conical expansion platform 10 is driven along the wire into the catheter, and then inserted into the patient's body. During the movement of the conical expansion platform 10, the patient's catheter gradually expands until it can accommodate the outer catheter 1, and then the outer catheter 1 gradually enters the patient's body along the catheter. After the outer tube 1 is inserted into the patient's body, the wires and expansion core 9 are removed in sequence to make room for subsequent medical devices.

[0042] To prevent displacement of the expansion core 9 during operation, a locking platform 11 is installed at the end of the expansion core 9 away from the conical expansion stage 10. The locking platform 11 engages with the limiting platform 5. During the insertion of the outer tube 1, the locking platform 11 is fixed to the limiting platform 5, making it difficult for the expansion core 9 to move, thus reducing harm to the patient. After the outer tube 1 is in place, the operator needs to operate the locking platform 11 to disengage from the limiting platform 5 and then remove the expansion core.

[0043] To prevent the working chamber 2 from communicating with the liquid delivery chamber 3, a separation membrane 14 is provided between the working chamber 2 and the liquid delivery chamber 3. The separation membrane 14 is preferably made of corrosion-resistant elastic rubber, and its purpose is to facilitate the bending of the separation membrane 14 with the outer tube 1.

[0044] To ensure sufficient space for the installation of other medical devices, the volume of the working chamber 2 is larger than the volume of the liquid delivery chamber 3.

[0045] To ensure that the volume of the working chamber 2 is greater than the volume of the liquid delivery chamber 3, the isolation membrane 14 in this design is arc-shaped, with the concave surface of the isolation membrane 14 facing the working chamber 2 and the convex surface of the isolation membrane 14 facing the liquid delivery chamber 3.

[0046] Preferably, the inner cavity volume of the outer tube 1 is a, the volume of the working chamber 2 is greater than or equal to a, and the volume of the liquid delivery chamber 3 is less than or equal to a.

[0047] To facilitate the installation of the mounting bracket 11 on the limiting platform 5, a limiting cavity 51 is provided inside the limiting platform 5. A positioning ring platform 15 is provided at the end of the limiting cavity 51 away from the connecting section 6. The side wall of the positioning ring platform 15 is provided with external threads. The mounting bracket 11 includes a top cover 12 and an annular platform 13. The annular platform 13 is located at the end of the top cover 12 facing the positioning ring platform 15. The inner wall of the annular platform 13 is provided with internal threads. The annular platform 13 is threadedly connected to the positioning ring platform 15. The expansion core 9 is connected to the end of the top cover 12 facing the positioning ring platform 15. After the outer tube 1 is installed in place, the operator rotates the top cover 12 to disengage the annular platform 13 from the positioning ring platform 15, and then pulls out the expansion core 9.

[0048] To facilitate the operator's rotation of the top cover 12, an auxiliary platform 16 is provided at the end of the top cover 12 away from the expansion core 9, and an auxiliary ring 17 is installed on the top of the auxiliary platform 16.

[0049] In this solution, the negative pressure channel 7 is located below the limiting platform 5. When the operator encounters a large stone fragment during stone removal, the operator needs to remove the laser lithotripsy fiber and replace the stone removal cage. Because the laser lithotripsy fiber is surrounded by fluids from the patient's body during use, some fluid will be carried out with it during extraction, which will contaminate the surrounding environment. To avoid this problem, such as... Figure 4 , Figures 6-8 As shown, an intercepting membrane 18 is installed inside the limiting cavity 51. A cross-shaped opening 19 is provided in the central region of the intercepting membrane 18, through which the expansion core 9 passes. During use, the medical device passes through the cross-shaped opening 19, during which the intercepting membrane 18 covers the outer wall of the medical device. When the operator needs to remove the medical device, the intercepting membrane 18 wipes away and intercepts any liquid adhering to the outer wall of the medical device, allowing it to return along the limiting cavity 51 to the outer tube 1, thereby preventing the patient's internal fluids from being carried out and causing external environmental contamination.

[0050] Although the intercepting membrane 18 will minimize the amount of liquid adhering to the outer wall of the medical device, it is inevitable that a small amount of liquid will not be intercepted and will accumulate on the intercepting membrane 18. In order to facilitate the rapid drainage of this liquid, a drain pipe 20 is installed on the side wall of the limiting platform 5, with one end of the drain pipe 20 located between the intercepting membrane 18 and the positioning ring platform 15.

[0051] like Figure 1 , Figure 9 As shown, in order to prevent liquid backflow in the liquid delivery chamber 3, a one-way valve 21 is provided at the end of the liquid injection channel 8 away from the connecting section 6.

[0052] In this design, a flow rate control module 22 is installed on the side wall of the negative pressure channel 7, and an adapter 23 is installed at the end of the negative pressure channel 7 away from the connecting section 6. Both the flow rate control module 22 and the adapter 23 are existing mature technologies and will not be described in detail here.

[0053] To facilitate the operator's grip on the operating handle 4, a supporting frustum 24 is provided between the connecting section 6 and the limiting platform 5, and several arc-shaped positioning grooves 25 are provided on the side wall of the connecting section 6. The width and depth of the arc-shaped positioning grooves 25 are close to the thickness and size of an adult's finger, which conforms to ergonomics and facilitates the operator's grip.

[0054] In this design, the end of the outer tube 1 furthest from the operating handle 4 is tapered, with the larger tapered base facing the operating handle 4. The purpose of this design is to reduce the end face area of ​​the outer tube 1 furthest from the operating handle 4, thus preventing the outer tube 1 from scratching the ureteral mucosa when it enters the patient's body.

[0055] Example 2:

[0056] Unlike Example 1, such as Figure 10-11 As shown, in this design, a protective plate 26 is inclinedly installed at the end of the delivery chamber 3 away from the operating handle 4. A side hole 27 is provided on the outer wall of the protective plate 26, and one end of the side hole 26 is connected to the delivery chamber 3. The protective plate 27 in this design is part of a cone. The purpose of this design is to reduce protruding structures and further prevent the outer tube 1 from scratching the patient's ureteral mucosa when it enters the patient's body.

[0057] Example 3:

[0058] Unlike Example 2, such as Figure 12 As shown, in this embodiment, a protective plate 26 is inclinedly provided at the end of the delivery chamber 3 away from the operating handle 4. The side hole 27 is located on the outer wall of the outer tube 1, and one end of the side hole 27 is connected to the delivery chamber 3. This design uses the protective plate 27 to seal the delivery chamber 3, while the side hole 27 facilitates the entry and exit of liquid into the delivery chamber 3. At the same time, this design minimizes protruding structures, thereby reducing the probability of the patient being scratched.

[0059] In summary, the advantages of this solution are: by combining the delivery chamber 3 with the working chamber 2, doctors can simultaneously inject liquid preparations for treatment or adjuvant treatment into the patient's body during examination and treatment, thus solving the problem of needing to switch medical devices in existing technologies.

[0060] This utility model is not limited to the specific embodiments described above. Any modifications made by those skilled in the art based on the above concept without creative effort shall fall within the protection scope of this utility model.

Claims

1. A ureteral guide sheath, comprising: The device includes an outer tube (1), which has a working chamber (2) and a liquid delivery chamber (3) inside. The working chamber (2) and the liquid delivery chamber (3) are parallel to each other. An operating handle (4) is installed at one end of the outer tube (1). The operating handle (4) includes a connecting section (6) and a limiting platform (5). One end of the connecting section (6) is connected to the outer tube (1), and the other end of the connecting section (6) is connected to the limiting platform (5). A negative pressure channel (7) and a liquid injection channel (8) are provided on the side wall of the connecting section (6). The negative pressure channel (7) is connected to the working chamber (2), and the liquid injection channel (8) is connected to the liquid delivery chamber (3).

2. The ureteral guide sheath of claim 1, wherein, An isolation membrane (14) is provided between the working chamber (2) and the liquid delivery chamber (3).

3. The ureteral guide sheath of claim 2, wherein, The isolation membrane (14) is arc-shaped, with the concave surface of the isolation membrane (14) facing the working chamber (2) and the convex surface of the isolation membrane (14) facing the liquid delivery chamber (3).

4. The ureteral guiding sheath according to claim 3, characterized in that, The volume of the working chamber (2) is greater than the volume of the liquid delivery chamber (3).

5. The ureteral guiding sheath according to claim 4, characterized in that, The inner cavity volume of the outer tube (1) is a, and the volume of the working cavity (2) is greater than or equal to a. The volume of the liquid delivery chamber (3) is less than or equal to .

6. The ureteral guiding sheath according to claim 1, characterized in that, An expansion core (9) is provided in the working chamber (2). A conical expansion platform (10) is provided at one end of the expansion core (9) away from the operating handle (4). A locking platform (11) is provided at the other end of the expansion core (9) away from the conical expansion platform (10). The locking platform (11) is connected to the limiting platform (5). A wire-leading hole (90) is provided inside the expansion core (9). The axis of the wire-leading hole (90) coincides with the axis of the expansion core (9). The wire-leading hole (90) penetrates the expansion core (9).

7. The ureteral guiding sheath according to claim 6, characterized in that, The limiting platform (5) is provided with a limiting cavity (51) inside. A positioning ring platform (15) is provided at the end of the limiting cavity (51) away from the connecting section (6). An external thread is provided around the side wall of the positioning ring platform (15). The locking platform (11) includes a top cover (12) and an annular platform (13). The annular platform (13) of the top cover (12) is located at the end of the top cover (12) facing the positioning ring platform (15). An internal thread is provided on the inner wall of the annular platform (13). The annular platform (13) is threadedly connected to the positioning ring platform (15). The expansion core (9) is connected to the end of the top cover (12) facing the positioning ring platform (15).

8. The ureteral guiding sheath according to claim 7, characterized in that, An auxiliary platform (16) is provided at the end of the top cover (12) away from the expansion core (9), and an auxiliary ring (17) is installed on the top of the auxiliary platform (16).

9. The ureteral guiding sheath according to claim 7, characterized in that, An intercepting soft membrane (18) is installed inside the limiting cavity (51). A cross opening (19) is provided in the central area of ​​the intercepting soft membrane (18), and the expansion core (9) passes through the cross opening (19).

10. The ureteral guiding sheath according to claim 9, characterized in that, A drainage pipe (20) is installed on the side wall of the limiting platform (5), and one end of the drainage pipe (20) is located between the intercepting soft membrane (18) and the positioning ring platform (15).

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