Endoscopic kidney stone taking-out device

Abstract

The utility model relates to the field of surgical instruments, and particularly discloses an endoscopic kidney stone taking-out device which comprises an inner sheath tube, an outer sheath tube and an integration part, the inner space of the inner sheath tube is a stone suction channel, and the stone suction channel is connected to an external negative pressure device and used for sucking broken stone; the outer sheath tube is sleeved outside the inner sheath tube; the space between the outer sheath tube and the inner sheath tube is a water inlet channel, and one end of the water inlet channel is located outside the body and connected with a water source; at least two channels, namely a laser channel and an endoscope channel, are arranged in the integration part in a penetrating manner, the laser channel is used for accommodating a laser optical fiber, and the endoscope channel is used for accommodating a connecting wire of an endoscope. The laser channel, the endoscope channel and other channels are integrated in a wrapping mode through the integration part, the size of the stone suction channel can be increased, and therefore the broken stone suction effect is improved; meanwhile, pressurized water injection is replaced by negative-pressure water suction, so that the pressure is convenient to control, the water pressure at the inner end of the body is reduced, and the risk of complications is reduced.

Description

Technical Field

[0001] This application relates to the field of surgical instruments, and in particular to an endoscopic kidney stone removal device. Background Technology

[0002] Kidney stones are a common urinary system disease. Kidney stone surgery mainly includes open nephrotomy, extracorporeal shock wave lithotripsy, ureteroscopic lithotripsy, and percutaneous nephrolithotomy.

[0003] Currently, percutaneous nephrolithotomy combined with holmium laser lithotripsy is commonly used in clinical practice, with the fragments removed by negative pressure suction. Due to the size limitations of the instrument channel, the fragments can only be suctioned out in stages after each laser lithotripsy session, requiring repeated operations, making the surgical procedure cumbersome and complex, and increasing the difficulty of the operation. When using an infusion pump for pressurization, the intracavitary pressure is difficult to control due to the small instrument channel, which can easily lead to a series of complications.

[0004] Chinese patent CN113598946A discloses a percutaneous renal microchannel visual puncture and dilation integrated kit with negative pressure suction. The internal space of the sheath is divided into a negative pressure channel and a water inlet channel by an arc-shaped partition wall. This partitioning method can easily lead to a small size of the negative pressure channel, which affects the effect of stone removal. Utility Model Content

[0005] To address the issue of poor stone removal due to the small size of the instrument channel, this application provides an endoscopic kidney stone removal device.

[0006] The endoscopic kidney stone removal device provided in this application adopts the following technical solution:

[0007] An endoscopic kidney stone removal device includes:

[0008] The inner sheath has an internal space that serves as a stone-suction channel, which is connected to an external negative pressure device for attracting gravel.

[0009] An outer sheath is fitted over the inner sheath; the space between the outer sheath and the inner sheath is a water inlet channel, which is connected to a water source.

[0010] The integrated section has at least two channels running through it: a laser channel and an endoscope channel. The laser channel is used to accommodate a laser fiber, and the endoscope channel is used to accommodate the endoscope's connecting wires.

[0011] Furthermore, the integrated part is fixedly disposed on the inner wall or outer wall of the inner sheath.

[0012] Furthermore, the inner sheath tube and the integrated part are detachably connected or integrally formed.

[0013] After puncture and guiding the end of the outer sheath into the kidney, laser lithotripsy is performed. Under the suction of an external negative pressure device, water from an external water source enters the kidney through the inlet channel, and the stones are drawn out from the suction channel with the water flow.

[0014] This application adopts an integrated unit that integrates multiple channels such as laser channel and endoscope channel. Compared with the prior art that uses a partition wall to divide the internal space of the sheath into negative pressure channel and water inlet channel, the integrated unit in this application occupies less space, which is conducive to increasing the size of the stone suction channel, thereby improving the stone suction effect.

[0015] Meanwhile, this application uses negative pressure water absorption instead of pressurized water injection, which helps to reduce the water pressure at the internal end of the body, thereby reducing the risk of complications.

[0016] Furthermore, the integrated unit is also provided with a lens rinsing channel for injecting water to rinse the lens of the endoscope.

[0017] Furthermore, the laser channel can serve as a lens rinsing channel for rinsing the endoscope lens with water.

[0018] The lens rinsing channel can be a separate channel integrated within the integrated unit, or the laser channel can be used as the lens rinsing channel. During operation, water is injected into the lens rinsing channel to rinse the endoscope lens, ensuring the accuracy of the images acquired by the endoscope lens.

[0019] Furthermore, the integrated portion extends along the length direction of the inner sheath, and the axial length of the integrated portion is not shorter than the axial length of the inner sheath.

[0020] Furthermore, one end of the integrated part is provided with a tip for wrapping an endoscope lens, and the cross-sectional dimension of the tip is larger than the cross-sectional dimension of the integrated part.

[0021] Furthermore, the connection between the integrated part and the end head is configured with a variable diameter.

[0022] The endpiece encasing the endoscope lens protrudes beyond the end of the inner sheath to ensure a sufficiently wide field of view for the endoscope lens. Considering that the cross-sectional dimension of the endoscope lens is typically larger than that of the endoscope connecting cable, the cross-sectional dimension of the endpiece is set to be larger than that of the integrated section. This ensures that the endoscope lens can be encased within the endpiece while minimizing the space occupied by the integrated section in the stone suction channel or water inlet channel, thus guaranteeing sufficient size for the stone suction channel or water inlet channel. To achieve a smooth transition between the integrated section and the endpiece, the connection between the integrated section and the endpiece is designed with a variable diameter, meaning the connection point between the integrated section and the endpiece is set as an inclined surface.

[0023] Furthermore, a Luer connector is connected to the side of the outer sheath, and the Luer connector is connected to the water inlet channel.

[0024] The water inlet channel is connected to the water source via a Luer connector. Under the suction of the external negative pressure device, the water injected into the kidney through the water inlet channel carries the stones and is then sucked out through the stone suction channel.

[0025] Furthermore, the endoscope is equipped with an illumination device.

[0026] The lighting device enables internal illumination, facilitating surgical procedures.

[0027] In summary, this application includes the following beneficial technical effects:

[0028] This application adopts an integrated unit that encapsulates multiple channels such as the laser channel, endoscope channel, and lens flushing channel, which helps to increase the size of the stone suction channel and thus improve the stone removal effect. At the same time, it uses negative pressure water suction instead of pressurized water injection, which makes it easier to control the pressure and helps to reduce the water pressure at the internal end, thereby reducing the risk of complications. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the device structure of Embodiment 1 of this application, wherein (a) is a front view and (b) is an axial view of the device;

[0030] Figure 2 This is a schematic diagram of the device structure of Embodiment 2 of this application, wherein (a) is a front view and (b) is an axial view of the device;

[0031] Figure 3 This is a schematic diagram of the device structure of Embodiment 3 of this application, wherein (a) is a front view, (b) is an axial view of the inner end of the device body, (c) is an axial view of the outer end of the device body, and (d) is a partial schematic diagram of the end of the inner end of the integrated part.

[0032] Reference numerals: 1. Outer sheath; 2. Stone suction channel; 3. Integration section; 4. Laser channel; 5. Endoscope channel; 6. Lens washing channel; 7. Inner sheath; 8. Water inlet channel; 9. Luer connector; 10. End; 11. Inclined surface. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0034] Example 1

[0035] This application discloses an endoscopic kidney stone removal device. (Refer to...) Figure 1In (a) and (b) of the diagram, the endoscopic kidney stone removal device includes an inner sheath 7 and an outer sheath 1 that is fitted over the inner sheath 7. The space inside the inner sheath 7 is configured as a stone suction channel 2, and one end of the stone suction channel 2 located outside the body is connected to an external negative pressure device for suctioning stone fragments. The space between the outer sheath 1 and the inner sheath 7 is a water inlet channel 8, one end of which is located outside the body and connected to a water source.

[0036] Reference Figure 1 In (a) and (b), the inner wall of the inner sheath 7 is provided with an integrated portion 3, which extends along the length of the inner sheath 7 and has a circular cross-section. The axial length of the integrated portion 3 is not shorter than the axial length of the inner sheath 7. The inner wall of the inner sheath 7 and the integrated portion 3 can be connected by means of bonding, snap-fitting, etc.; in some feasible embodiments, the inner sheath 7 and the integrated portion 3 can also be manufactured by integral molding.

[0037] Reference Figure 1 In embodiment (b), the integrated unit 3 is permeated by a laser channel 4, an endoscope channel 5, and a lens rinsing channel 6. The laser channel 4 houses a laser fiber or other lithotripsy tools, with the end of the laser fiber located at the body-side end of the laser channel 4 for breaking up stones. The endoscope channel 5 houses the endoscope's connecting cable, and the endoscope's lens is located at the body-side end of the endoscope channel 5 for acquiring internal images; furthermore, the endoscope's lens end is equipped with an illumination device to provide lighting for the surgical area. The lens rinsing channel 6, located outside the body, is connected to a water source for rinsing the endoscope's lens. In other feasible embodiments, the integrated unit 3 may have two channels permeated by it: the laser channel 4 and the endoscope channel 5. The laser channel 4, in addition to serving as a channel for housing the laser fiber, can also serve as a lens rinsing channel for rinsing the endoscope's lens.

[0038] The method of using the endoscopic kidney stone removal device provided in this embodiment is as follows: the end of the outer sheath 1 is punctured and guided into the kidney, the stone is broken by laser or other lithotripsy tools, and under the suction of the external negative pressure device, water from the external water source enters the kidney through the water inlet channel 8, and the stone fragments are sucked out from the stone suction channel 2 with the water flow.

[0039] This application uses an integrated section 3 to integrate multiple channels such as laser channel 4, endoscope channel 5, and lens rinsing channel 6. Compared with the prior art, which uses a partition wall to divide the internal space of the sheath into a negative pressure channel and a water inlet channel, the integrated section 3 in this application occupies less space, which is beneficial to increasing the cross-sectional size of the stone suction channel 2, thereby improving the stone suction effect.

[0040] Meanwhile, this application uses negative pressure water absorption instead of pressurized water injection, which makes it easier to control the pressure and helps to reduce the water pressure at the internal end, thereby reducing the risk of complications.

[0041] It should be noted that the cross-sectional shape of the integrated part 3 is not limited to the circular shape disclosed in this embodiment, but can also be other shapes such as ellipse. In order to maximize the cross-sectional size of the stone suction channel 2, the cross-sectional area of ​​the integrated part 3 should be as small as possible, just enough to effectively enclose the laser channel 4, the endoscope channel 5 and the lens rinsing channel 6.

[0042] Example 2

[0043] This application discloses an endoscopic kidney stone removal device. (Refer to...) Figure 2 The difference between (a) and (b) in this embodiment and that in embodiment 1 is that the integrated part 3 is disposed on the outer wall of the inner sheath tube 7, and the cross-sectional shape of the integrated part 3 is irregular.

[0044] The integrating part 3 and the inner sheath 7 can be configured as a detachable structure, for example, by using a snap-fit ​​connection. The inner sheath 7 is for single use and should be disassembled and replaced after each use. Alternatively, the integrating part 3 and the inner sheath 7 can be configured as a non-detachable integrated structure, which can be reused after each use by cleaning the integrating part 3 and the inner sheath 7.

[0045] During operation, the integrated part 3 and the inner sheath tube 7 maintain a stable fixed connection. In order to facilitate the insertion of the integrated part 3 and the inner sheath tube 7 into the outer sheath tube 1, the overall radial dimension of the integrated part 3 and the inner sheath tube 7 is slightly smaller than the inner diameter of the outer sheath tube 1.

[0046] The method of using the endoscopic kidney stone removal device provided in this embodiment is the same as that in Embodiment 1.

[0047] It should be noted that the cross-sectional shape of the integrated part 3 is not limited to the irregular shape disclosed in this embodiment, and can also be other shapes such as ellipse or circle. In order to maximize the cross-sectional size of the water inlet channel 8, the cross-sectional area of ​​the integrated part 3 should be as small as possible, just enough to effectively enclose the laser channel 4, endoscope channel 5 and lens rinsing channel 6.

[0048] Example 3

[0049] This application discloses an endoscopic kidney stone removal device. (Refer to...) Figure 3 In (a), (b), and (c), the endoscopic kidney stone removal device includes an inner sheath 7 and an outer sheath 1 sleeved outside the inner sheath 7. The space inside the inner sheath 7 is configured as a stone suction channel 2, and one end of the stone suction channel 2 located outside the body is connected to an external negative pressure device for suctioning stone fragments.

[0050] Reference Figure 3In (a), (b), and (c), the space between the outer sheath 1 and the inner sheath 7 is the water inlet channel 8, and a Luer connector 9 is connected to the side of the outer section of the outer sheath 1. One end of the Luer connector 9 is connected to the water inlet channel 8, and the other end is connected to a water source.

[0051] Reference Figure 3 In embodiments (a), (b), and (c), the inner wall of the inner sheath 7 is provided with an integrated portion 3. The integrated portion 3 extends along the length of the inner sheath 7, and its cross-section is elliptical. The axial length of the integrated portion 3 is not shorter than the axial length of the inner sheath 7. In other feasible embodiments, the integrated portion 3 can also be provided on the outer wall of the inner sheath 7. The inner sheath 7 and the integrated portion 3 can be connected by means of bonding, snap-fitting, etc.; in some feasible embodiments, the inner sheath 7 and the integrated portion 3 can also be manufactured by integral molding.

[0052] Reference Figure 3 In (b) and (c), a laser channel 4 and an endoscope channel 5 are provided throughout the integrated section 3. The laser channel 4 houses a laser fiber, with its end located at the body-bound end of the laser channel 4 for breaking up stones. The endoscope channel 5 houses an endoscope connector cable, and the endoscope lens is located at the body-bound end of the endoscope channel 5 for acquiring internal images; furthermore, the endoscope lens has an illumination device to provide lighting for the surgical area.

[0053] In this embodiment, the laser channel 4, in addition to serving as a channel for accommodating the laser fiber, can also serve as a lens rinsing channel for injecting water to rinse the endoscope lens, thereby ensuring the accuracy of the images acquired by the endoscope lens.

[0054] Reference Figure 3 In section (d), the integrated part 3 has an end cap 10 located at one end within the body, used to enclose the endoscope lens and the end of the laser fiber. The end cap 10 extends beyond the end of the inner sheath 7 to ensure the endoscope lens has a sufficiently wide field of view. Considering that the cross-sectional size of the endoscope lens is usually larger than the cross-sectional size of the endoscope connecting wire, the cross-sectional size of the end cap 10 needs to be set to be larger than the cross-sectional size of the integrated part 3. In this way, it is ensured that the endoscope lens can be enclosed in the end cap 10, while minimizing the space occupied by the integrated part 3 in the inner sheath 7, thereby ensuring that the stone suction channel 2 has sufficient size. To achieve a smooth transition between the integrated part 3 and the end cap 10, the connection between the integrated part 3 and the end cap 10 is set with a variable diameter, that is, the connection part between the integrated part 3 and the end cap 10 is set as an inclined surface 11.

[0055] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An endoscopic kidney stone removal device, characterized in that: include: The inner sheath has an internal space that serves as a stone-suction channel, which is connected to an external negative pressure device for attracting gravel. An outer sheath is fitted over the inner sheath; The space between the outer sheath and the inner sheath is a water inlet channel, and the water inlet channel is connected to a water source. The integrated section has at least two channels running through it: a laser channel and an endoscope channel. The laser channel is used to accommodate a laser fiber, and the endoscope channel is used to accommodate the endoscope's connecting wires.

2. The endoscopic kidney stone removal device according to claim 1, characterized in that: The integrated part is fixedly disposed on the inner wall or outer wall of the inner sheath tube.

3. The endoscopic kidney stone removal device according to claim 2, characterized in that: The inner sheath tube and the integrated part are detachably connected or integrally formed.

4. The endoscopic kidney stone removal device according to claim 1, characterized in that: The integrated section also has a lens rinsing channel for rinsing the endoscope lens with water.

5. The endoscopic kidney stone removal device according to claim 1, characterized in that: The laser channel can be used as a lens rinsing channel for rinsing the endoscope lens with water.

6. The endoscopic kidney stone removal device according to claim 1, characterized in that: The integrated portion extends along the length of the inner sheath, and the axial length of the integrated portion is not shorter than the axial length of the inner sheath.

7. The endoscopic kidney stone removal device according to claim 6, characterized in that: One end of the integrated part is provided with a tip for wrapping an endoscope lens, and the cross-sectional dimension of the tip is larger than the cross-sectional dimension of the integrated part.

8. The endoscopic kidney stone removal device according to claim 7, characterized in that: The connection between the integrated part and the end head is configured with a variable diameter.

9. The endoscopic kidney stone removal device according to claim 1, characterized in that: The outer sheath is connected to a Luer connector on its side, and the Luer connector is connected to the water inlet channel.

10. The endoscopic kidney stone removal device according to claim 1, characterized in that: The endoscope is equipped with an illumination device.

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