A rigid ureteroscope

Abstract

The present invention relates to the technical field of medical devices, and particularly relates to a rigid ureteroscope, which comprises a lens body and an outer sleeve sleeved outside the lens body. A working channel for a lithotripsy tool to pass through and an imaging channel for installing an imaging tool are formed in the lens body along the length direction of the lens body. The first end of the lens body extends out of the first end of the outer sleeve. A plurality of first grooves are recessed along the length direction of the outer wall of the lens body, so that an adsorption channel is formed between the first grooves and the inner wall of the outer sleeve. A negative pressure chamber is formed in the outer sleeve. The adsorption channel is communicated with the negative pressure chamber, the negative pressure chamber is communicated with an external negative pressure device, and the working channel is communicated with an external perfusion device. When using the present invention for performing a lithotripsy operation on the stones in the ureter, a continuous lavage and reflux system can be formed, the low pressure in the renal pelvis can be maintained, the surgical field of view can be made clear, the operation time can be shortened, and the stone powder generated after lithotripsy can be discharged out of the body along with the water flow to improve the stone clearance efficiency.

Description

Technical Field

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

[0002] Urinary calculi are common diseases of the urinary system. Calculi can be found in any part of the kidney, bladder, ureter and urethra, with kidney and ureteral calculi being the most common. For ureteral calculi, a ureteral hard endoscope can be inserted into the ureter through the urethra and bladder, and then a lithotripsy tool is used to break the calculi, and then the broken calculi are discharged from the body through the urethra through urine. The water channel on the existing hard endoscope is a single channel, which is both an operation channel (for inserting laser optical fiber, stone removal forceps, stone basket, etc.) and an irrigation channel, and lacks an additional reflux channel for irrigation water. During surgery, water can only be poured into the ureter, and water cannot be discharged to the outside of the body while pouring water, and water circulation cannot be formed. The existing rigid ureteroscope has the following problems during the lithotripsy process: ① Continuous perfusion causes the pressure in the renal pelvis to gradually increase, increasing the risk of postoperative urinary sepsis; ② The lack of a water reflux channel leads to blurred and turbid surgical field of view, increasing the risk of ureteral injury; ③ After the stone is crushed, the stone particles cannot be discharged from the body in time through the perfusion channel, and some tiny stones will adhere to the inner wall of the tissue, making it difficult to be discharged from the body with urine later, resulting in a low stone clearance rate. Summary of the invention

[0003] In view of the above-mentioned deficiencies of the prior art, the technical problem to be solved by the present invention is: to provide a ureteral rigid scope, by adding an adsorption channel with reflux function on the scope body, so as to solve the problem that the ureteral rigid scope in the prior art cannot form a water circulation of perfusion and reflux during surgery, so that the crushed stone particles cannot be discharged from the body in time, resulting in a low stone clearance rate.

[0004] In order to solve the above technical problems, a technical solution adopted by the present invention is: a ureteral rigid endoscope, comprising a scope body and an outer sleeve mounted outside the scope body, the scope body is cylindrical, and a working channel for accommodating the passage of a lithotripsy tool and an imaging channel for installing an imaging tool are formed in the scope body along the length direction of the scope body, the first end of the working channel and the first end of the imaging channel both pass through the first end of the scope body, the first end of the scope body extends out of the first end of the outer sleeve, a plurality of first grooves are recessed on the outer wall of the scope body along the length direction of the scope body so that an adsorption channel is formed between the first grooves and the inner wall of the outer sleeve, a negative pressure chamber is formed in the outer sleeve, the adsorption channel is connected to the negative pressure chamber, the negative pressure chamber is connected to an external negative pressure device, and a water inlet hole is provided on the side wall of the second end of the scope body so that the working channel is connected to an external perfusion device.

[0005] Through the above arrangement, when performing lithotripsy on stones in the ureter, water is injected into the kidney through the working channel and adsorbed through the adsorption channel to form a continuous irrigation circulation system, and the tiny stones generated in the lithotripsy process are carried by the water and discharged out of the kidney through the adsorption channel, so that the tiny stones formed after lithotripsy can be cleared away in time, thereby improving the stone clearance rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0007] Figure 1 It is a structural schematic diagram of the main view direction of the present invention.

[0008] Figure 2 for Figure 1 Enlarged view of part A in .

[0009] Figure 3 for Figure 1 Enlarged view of part B in .

[0010] Figure 4 for Figure 1 Enlarged view of part C in .

[0011] Figure 5 for Figure 1 Middle AA section view.

[0012] Figure 6 for Figure 3 Middle BB section view.

[0013] Figure 7 for Figure 3 Middle CC section view.

[0014] Figure 8 Schematic diagram of the cooperation between the spiral groove on the inner cylinder and the slide rod.

[0015] The meanings of the symbols in the accompanying drawings are:

[0016] Lens body - 10; Working channel - 101; Photography channel - 102; Camera head - 1021; Image transmission bundle - 1022; Light guide channel - 103; Light guide optical fiber - 1031; First groove - 104; Water inlet hole - 105; Water inlet pipe - 1051; Outer sleeve - 20; Inner cylinder - 201; Second groove - 2011; Flow hole - 2012; Spiral groove - 2013; Outer cylinder - 202; Ring convex part - 2021; Water outlet hole - 2022; Water outlet pipe - 2023; Negative pressure chamber - 203; Adsorption channel - 30; Bump - 40; Slide groove - 401; Limit groove - 4011; Slide bar - 402; Limit slider - 4021; Spring - 403; Holmium laser optical fiber - 50; Fixed pipe - 501; Support rod - 502; Sealing ring - 60; Handle - 70. Detailed implementation mode

[0017] To make the objectives, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be clearly and completely described below in conjunction with specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present application.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this invention belongs. The terms used in the description of the present invention in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0019] A rigid ureteroscope of this embodiment, as Figure 1 shown, includes a lens body 10 and an outer sleeve 20 sleeved outside the lens body 10. The lens body 10 is cylindrical, the axis of the lens body 10 is a straight line, and a working channel 101 for a lithotripsy tool to pass through and an imaging channel for installing an imaging tool are formed along the length direction of the lens body 10 inside the lens body 10. The first ends of the working channel 101 and the imaging channel both penetrate through the first end of the lens body 10. The first end of the lens body 10 extends out of the first end of the outer sleeve 20. A plurality of first grooves 104 are recessed along the length direction of the outer wall of the lens body 10, so that an adsorption channel 30 for water body and tiny stones to pass through is formed between the first grooves 104 and the inner wall of the outer sleeve 20. A negative pressure chamber 203 is formed inside the outer sleeve 20. The adsorption channel 30 is communicated with the negative pressure chamber 203, and the negative pressure chamber 203 is communicated with an external negative pressure device. A water inlet hole 105 is arranged on the side wall of the second end of the lens body 10 to communicate the working channel 101 with an external perfusion device. A handle 70 is fixedly connected to the outer cylinder 202 to facilitate holding and operating the rigid ureteroscope.

[0020] As Figure 1 、 Figure 5 described above, the imaging tool includes a camera head 1021, an image transmission bundle 1022, and a light guiding optical fiber 1031. The imaging channel includes a camera channel 102 for installing the camera head 1021 and the image transmission bundle 1022, and a light guiding channel 103 for arranging the light guiding optical fiber 1031. As Figure 2 shown, the camera head 1021 is disposed at the first end of the camera channel 102. The camera head 1021 is fixedly and sealingly connected to the camera channel 102 to close the first end of the camera channel 102 and prevent water from entering the camera channel 102. The image transmission bundle is disposed in the camera channel 102. The image transmission bundle includes a data line capable of transmitting the image information generated by the camera head 1021 to a display. Combining Figure 4 shown, one end of the image transmission bundle is electrically connected to the camera head 1021, and the other end of the image transmission bundle passes through the side wall of the second end of the lens body 10 and is electrically connected to an external display device (not shown). There are two light guiding channels 103. The two light guiding channels 103 are respectively located below both sides of the camera channel 102. The light guiding optical fiber 1031 is disposed in the light guiding channel 103. The first end of the light guiding optical fiber 1031 is fixedly and sealingly connected to the first end of the light guiding channel 103 to close the first end of the light guiding channel 103 and prevent water from entering the light guiding channel 103. The second end (not shown) of the light guiding optical fiber 1031 passes through the side wall of the second end of the lens body 10 and is connected to an external light source (not shown) for guiding the light of the light source to the first end of the light guiding optical fiber 1031 to provide illumination for the surgical environment.

[0021] Both the working channel 101 and the imaging channel are arranged to be closer to the lower body of the lens body 10, so that there is more space in the upper middle part of the lens body 10 for arranging the first groove 104. As Figure 5 shown, in this embodiment, there are six first grooves 104 arranged along the length direction of the outer wall of the upper middle part of the lens body 10. The first grooves 104 are arc-shaped grooves.

[0022] As Figure 1 、 Figure 2 、 Figure 5As shown, the outer sleeve 20 includes an inner cylinder 201 and an outer cylinder 202 which are coaxially arranged. The inner wall of the inner cylinder 201 is attached to the outer wall of the lens body 10. The inner cylinder 201 is rotatably connected to the lens body 10. The outer cylinder 202 is sleeved outside the inner cylinder 201. The outer wall of the inner cylinder 201 is attached to the inner wall of the outer cylinder 202 so that the inner cylinder 201 is rotatably connected to the outer cylinder 202. The second end of the outer cylinder 202 is fixedly connected to the lens body 10, and the second end of the lens body 10 extends outside the second end of the outer cylinder 202. A second groove 2011 is recessed along the length direction of the inner cylinder 201 on the inner wall of the inner cylinder 201 corresponding to the adsorption channel 30, so that when the inner cylinder 201 rotates, it can more effectively push and squeeze the tiny gravel stuck in the adsorption channel 30 to further break the tiny gravel.

[0023] As Figure 1 , Figure 3 , Figure 6 As shown, a ring convex portion 2021 is provided on the outer wall of the outer cylinder 202 near the second end of the lens body 10. The negative pressure chamber 203 is formed inside the ring convex portion 2021. A circulation hole 2012 is provided on the side wall of the inner cylinder 201 corresponding to the ring convex portion 2021 to communicate the adsorption channel 30 with the negative pressure chamber 203. A water outlet hole 2022 is provided on the ring convex portion 2021, and a water outlet pipe 2023 is provided at the water outlet hole 2022. One end of the water outlet pipe 2023 is hermetically communicated with the water outlet hole 2022, and the other end of the water outlet pipe 2023 is communicated with an external negative pressure device to continuously generate negative pressure in the negative pressure chamber 203. Combining Figure 7 As shown, a convex block 40 protrudes outward on the outer wall near the second end of the outer cylinder 202. The convex block 40 is integrally formed with the outer cylinder 202. A sliding groove 401 is provided in the convex block 40 along the axis direction of the lens body 10. The sliding groove 401 penetrates upward through the lower side wall of the outer cylinder 202. A sliding rod 402 is slidably connected in the sliding groove 401 so that the sliding rod 402 can slide along the length direction of the sliding groove 401. A spring 403 is horizontally arranged in the sliding groove 401 along the length direction of the sliding groove 401. One end of the spring 403 is fixedly connected to the sliding rod 402, and the other end of the spring 403 is fixedly connected to the inner wall of the sliding groove 401. Limiting sliding blocks 4021 protrude on both sides of the sliding rod 402. The limiting sliding blocks 4021 are integrally formed with the sliding rod 402. Limiting grooves 4011 which are slidably matched with the limiting sliding blocks 4021 are provided on the side wall of the sliding groove 401 along the length direction of the sliding groove 401 so that the sliding rod 402 can slide along the length direction of the sliding groove 401 without falling downward.

[0024] As Figure 3 , Figure 8As shown, a spiral groove 2013 is formed on the side wall of the inner cylinder 201 corresponding to the sliding groove 401. The upper end of the sliding rod 402 is inserted into the spiral groove 2013, and the lower end of the sliding rod 402 extends downward out of the bump 40. Under the elastic force of the spring 403, the sliding rod 402 abuts against one end of the spiral groove 2013 close to the first end of the lens body 10.

[0025] The gravel tool is a holmium laser optical fiber 50. The front end of the holmium laser optical fiber 50 extends out of the first end of the lens body 10, and the rear end of the holmium laser optical fiber 50 extends out of the second end of the lens body 10 and is connected to an external laser generator (not shown). A sealing ring 60 is provided at the second end of the lens body 10, and the holmium laser optical fiber 50 is fixedly connected to the sealing ring 60 in a sealed manner. To prevent the water flowing in the working channel 101 from causing the holmium laser optical fiber 50 to shake and interfere with the gravel operation during graveling with the holmium laser optical fiber 50, a fixing tube 501 is sleeved outside the holmium laser optical fiber 50 located in the working channel 101. The fixing tube 501 is slidably connected to the holmium laser optical fiber 50, and one end of the fixing tube 501 close to the second end of the lens body 10 is fixedly connected to the lens body 10. Since the fixing rod is slender, to prevent the fixing tube 501 from shaking, a support rod 502 is provided on the outer wall of the fixing tube 501 close to the first end of the lens body 10. One end of the support rod 502 is fixedly connected to the outer wall of the fixing tube 501, and the other end of the support rod 502 contacts the inner wall of the working channel 101 to prevent the fixing tube 501 from shaking in the working channel 101.

[0026] As Figure 2 shown, a slope inclined in the direction close to the second end of the lens body 10 is provided at the lower part of the first end of the lens body 10, and the first end of the working channel 101 is provided at the slope.

[0027] As Figure 1 、 Figure 4 shown, a water inlet hole 1051 for communicating the working channel 101 with the external space of the lens body 10 is provided on the side wall close to the second end of the lens body 10. A water inlet pipe 1051 is provided at the water inlet hole 105. One end of the water inlet pipe 1051 is hermetically communicated with the water inlet hole 105, and the other end of the water inlet pipe 1051 is communicated with an external perfusion device (not shown). The external perfusion device can perfuse water into the working channel 101 through the water inlet pipe.

[0028] When the present invention is used during surgery, the camera 1021 and the light source are started, and the ureteroscope of the present invention is inserted into the bladder through the urethra with the visual assistance of the external display, and then inserted into the ureter from the ureteral opening, and the irrigation device and the negative pressure device are turned on to form a water circulation. Water is poured into the ureter through the working channel 101 and adsorbed through the adsorption channel 30 to form a continuous irrigation system. When a stone is found, the handle 70 is operated to make the first end of the holmium laser fiber 50 close to the stone and the laser generator is operated. The holmium laser fiber 50 breaks the stone, and the tiny gravel generated in the stone crushing process is carried by the water body through the adsorption channel 30 and then discharged out of the body through the water outlet pipe 2023, so that the tiny gravel formed after the stone crushing can be cleaned up in time.

[0029] After being crushed, the tiny gravel flows out through the adsorption channel 30 under the carry of the water. Since the adsorption channel 30 is small, some gravel will be adsorbed into the channel and stuck in the adsorption channel 30. When such gravel accumulates more and more in the channel, the adsorption efficiency of tiny gravel will decrease. When gravel is stuck in the adsorption channel 30 and blocks the adsorption channel 30, the slide bar 402 is slid toward the second end of the mirror body 10. With the cooperation of the spiral groove 2013 and the slide bar 402, the inner cylinder 201 rotates around the axis of the mirror body 10 by a certain angle, forcing the tiny gravel stuck in the adsorption channel 30 to change its position or be squeezed and crushed, so that the adsorption channel 30 is unblocked again. The slide bar 402 is released, and under the elastic force of the spring 403, the slide bar 402 slides toward the first end of the mirror body 10 to make the inner cylinder 201 return to its original position.

[0030] Compared with the existing ureteroscope, the present invention has at least the following beneficial effects:

[0031] 1. The ureteroscope of the present invention forms an adsorption channel 30 between an outer sleeve 20 disposed outside the mirror body 10 and a first groove 104 disposed on the outer wall of the mirror body 10 and the outer sleeve 20. The adsorption channel 30 is combined with the working channel 101 in the mirror body 10, and combined with external perfusion equipment and negative pressure equipment, the surgical environment can be continuously perfused and negatively pressured to generate water circulation during surgery, and the tiny gravel generated during the surgery can be discharged through the adsorption channel 30 in time, so as to prevent the tiny gravel from adhering to the inner wall of the ureter and being unable to be discharged from the body, thereby improving the stone clearance rate.

[0032] 2. The outer sleeve 20 of the rigid ureteroscope of the present invention includes a rotatable inner sleeve 201. When the adsorption channel 30 is blocked, the inner sleeve 201 is forced to rotate by sliding the slide rod 402, so that the tiny gravel or blood clot stuck in the adsorption channel 30 can be squeezed and broken, so that the adsorption channel 30 is unblocked again, thereby improving the adsorption and discharge effect of the tiny gravel.

[0033] 3. Since continuous perfusion and adsorption can form a water cycle to suck out tiny gravel, the water body around the camera 1021 is clean and clear. When the rigid ureteroscope of the present invention is used, the intraoperative vision is clear. Therefore, the risk of intraoperative ureteral injury and massive hemorrhage can be significantly reduced.

[0034] 4. Since continuous perfusion and reflux can form a water cycle, it is possible to maintain low pressure in the renal pelvis and reduce the occurrence of postoperative urosepsis.

[0035] The above are only embodiments of the present invention, and common knowledge such as specific structures and characteristics known in the solutions is not described in detail here. It should be noted that for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicality of the patent. The protection scope required by this application shall be subject to the content of its claims, and the specific implementation manners described in the specification can be used to interpret the content of the claims.

Claims

1. A rigid ureteroscope, characterized in that: it includes a lens body and an outer sleeve sleeved outside the lens body. The lens body is cylindrical. A working channel for the passage of a lithotripsy tool and an imaging channel for installing an imaging tool are formed along the length direction of the lens body inside the lens body. The first ends of the working channel and the imaging channel both penetrate through the first end of the lens body. The first end of the lens body extends out of the first end of the outer sleeve. A plurality of first grooves are recessed along the length direction of the outer wall of the lens body so as to form an adsorption channel between the first grooves and the inner wall of the outer sleeve. A negative pressure chamber is formed inside the outer sleeve. The adsorption channel is communicated with the negative pressure chamber. The negative pressure chamber is communicated with an external negative pressure device. The working channel is communicated with an external perfusion device; the outer sleeve includes an inner cylinder and an outer cylinder arranged coaxially. The inner wall of the inner cylinder fits against the outer wall of the lens body. The inner cylinder is rotationally connected with the lens body. The outer cylinder is sleeved outside the inner cylinder and is rotationally connected with the inner cylinder. The second end of the outer cylinder is fixedly connected with the lens body. A convex block is fixedly connected to the outer wall near the second end of the outer cylinder. A sliding groove is arranged along the axial direction of the lens body inside the convex block. A sliding rod is slidably connected inside the sliding groove so that the sliding rod can slide along the length direction of the sliding groove. An elastic member for forcing the sliding rod to slide towards the first end of the lens body is arranged inside the sliding groove. A spiral groove is opened on the side wall of the inner cylinder corresponding to the sliding groove. The upper end of the sliding rod is inserted into the spiral groove, and the lower end of the sliding rod extends downward out of the convex block; a second groove is recessed along the length direction of the inner wall of the inner cylinder corresponding to the adsorption channel; a ring convex portion is arranged on the outer wall of the outer cylinder. The negative pressure chamber is formed inside the ring convex portion. A circulation hole is arranged on the side wall of the inner cylinder corresponding to the ring convex portion so that the adsorption channel is communicated with the negative pressure chamber.

2. The rigid ureteroscope according to claim 1, characterized in that: the imaging tool includes a camera head, an image transmission bundle and a light guide optical fiber. The imaging channel includes a photography channel for installing the camera head and the image transmission bundle and a light guide channel for arranging the light guide optical fiber. The camera head is arranged at the first end of the photography channel to seal the first end of the photography channel. The image transmission bundle is arranged inside the photography channel. One end of the image transmission bundle is electrically connected with the camera head, and the other end of the image transmission bundle is electrically connected with an external display device. The first end of the light guide optical fiber is located at the first end of the light guide channel to seal the first end of the light guide channel. The second end of the light guide optical fiber is connected with an external light source for guiding the light of the light source to the first end of the light guide optical fiber.

3. The rigid ureteroscope according to claim 2, characterized in that: there are 2 light guide channels, and the 2 light guide channels are respectively located below both sides of the photography channel.

4. The rigid ureteroscope according to claim 3, characterized in that: the lithotripsy tool is a holmium laser optical fiber. The front end of the holmium laser optical fiber extends out of the first end of the lens body. The rear end of the holmium laser optical fiber extends out of the second end of the lens body and is then connected with an external laser generator. A sealing ring is arranged at the second end of the lens body. The holmium laser optical fiber is hermetically and fixedly connected with the sealing ring.

5. The rigid ureteroscope according to claim 4, characterized in that: A holmium laser optical fiber located in the working channel is sleeved with a fixing tube. The fixing tube is slidably connected to the holmium laser optical fiber. One end of the fixing tube is fixedly connected to the lens body. A support rod is arranged on the outer wall of the fixing tube. One end of the support rod is fixedly connected to the outer wall of the fixing tube, and the other end of the support rod contacts the inner wall of the working channel.

6. The rigid ureteroscope according to claim 5, characterized in that: A slope inclined towards the second end of the lens body is provided at the lower part of the first end of the lens body, and the first end of the working channel is located at the slope.

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