Laser fixing device under endoscope
By using the clamping forceps and elastic filter design of the endoscopic laser fixator, the problem of precise stone fragmentation and safe collection of stone fragments in percutaneous nephrolithotomy with laser fiber is solved, achieving an efficient and safe stone fragmentation process.
Patent Information
- Application Number
- CN202522399337.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-12
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2035-11-12
AI Technical Summary
In percutaneous nephrolithotomy, laser fiber optics are difficult to precisely break up stones and are prone to damaging surrounding tissues, especially in the renal pelvis with severe hydronephrosis, where stone movement leads to low stone fragmentation efficiency and stone fragments can easily damage surrounding tissues.
An endoscopic laser fixator was designed, including a gripping part, a controller, an extension rod, and a working part. The working part includes clamping forceps and an elastic filter. The controller drives the clamping forceps to open and close, clamping the stones, and uses optical fibers in the optical fiber channel to precisely break up the stones. After breaking up the stones, the elastic filter wraps the stone fragments.
It achieves precision and safety in laser lithotripsy, avoids damage to surrounding tissues, improves lithotripsy efficiency, and can safely collect stone fragments.
Smart Images
Figure CN223682609U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of laser lithotripsy instrument technology, specifically relating to an endoscopic laser fixator. Background Technology
[0002] Percutaneous nephrolithotomy (PCNL) is a minimally invasive surgical procedure used to treat urinary system diseases such as kidney stones. Under ultrasound or X-ray guidance, doctors create a 1cm channel through a lumbar puncture to access the renal pelvis and calyces, insert a nephroscope, and use tools such as lasers, pneumatic ballistic devices, or ultrasound to break up and remove the stones.
[0003] This treatment is suitable for kidney stones ≥2cm in diameter, staghorn calculi, and stones located in the renal calyces or diverticula. It is also suitable for complex kidney stones, such as calyceal diverticulum stones and obstructive stones in the upper ureter. Stones that have failed extracorporeal shock wave lithotripsy or cannot be treated with ureteroscopy are also suitable. Special types of kidney stones, such as solitary kidneys and horseshoe kidneys, are also included.
[0004] Percutaneous nephrolithotomy (PCNL) involves a small incision, results in less postoperative pain and faster recovery, and causes minimal damage to the kidney and surrounding tissues. It allows for direct lithotripsy and stone removal, making it particularly suitable for complex stones. It is applicable to various types of kidney stones and special cases.
[0005] During percutaneous nephrolithotomy, when a laser fiber is inserted for lithotripsy, the fiber is thin and swings considerably within the channel, making it difficult to precisely fragment the stones and easily damaging surrounding tissues. Furthermore, in severely hydronephrotic renal pelvises, the larger space allows smaller stones to easily move under the influence of water flow, resulting in low fragmentation efficiency and potential damage to surrounding tissues. Utility Model Content
[0006] To address the aforementioned issues, this application discloses an endoscopic laser fixation device.
[0007] An endoscopic laser fixator includes a gripping part, a controller, an extension rod, and a working part; the gripping part and the extension rod are arranged along an axis; one end of the controller is slidably connected to the gripping part, and the other end passes through the extension rod; the controller has an internal fiber optic channel; the working part is located at the end of the extension rod away from the gripping part; the working part includes an elastic filter, clamps, and an adjusting arm; the clamps are hinged to the extension rod; one end of the adjusting arm is hinged to the clamps, and the other end is hinged to the controller; the clamps are arranged circumferentially around the axis of the extension rod; the elastic filter is wrapped around the outer wall of the clamps.
[0008] Furthermore, the optical fiber channel contains optical fibers.
[0009] Further, the clamping forceps comprise a first clamping arm and a second clamping arm; the first clamping arm and the second clamping arm are detachably connected; the elastic filter screen is in a tubular structure; the elastic filter screen is wrapped outside the first clamping arm, and both ends thereof are folded into the gap between the first clamping arm and the second clamping arm.
[0010] Further, the first clamping arm is provided with a protrusion on the side facing the second clamping arm; the side wall of the second clamping arm is provided with a groove matched with the protrusion.
[0011] Further, the controller comprises a sliding sleeve and a control rod arranged along an axis; the sliding sleeve is slidably connected with the holding part; the control rod penetrates the extension rod.
[0012] Further, the outer wall of the sliding sleeve is provided with a sliding handle.
[0013] Further, the holding part comprises a holding handle and a sliding channel; the sliding channel is located inside the holding handle; the controller slides along the sliding channel.
[0014] The utility model discloses beneficial effects:
[0015] The optical fiber is fixed inside the optical fiber channel, prevents the optical fiber from shaking, can accurately crush the stone, and avoids damaging the surrounding tissue.
[0016] The controller is pushed towards the direction of the clamping forceps, the controller drives the adjusting arm to rotate, and drives the clamping forceps to open; the controller is pushed away from the direction of the clamping forceps, the controller drives the adjusting arm to rotate reversely, and drives the clamping forceps to close. In the operation process, the clamping forceps are opened and closed under the driving of the controller, so as to clamp the stone, so that the laser can be aligned with the stone, and the stone can be accurately crushed.
[0017] The filter screen is wrapped outside the clamping forceps, and can wrap the stone fragments in the process of laser lithotripsy, so as to prevent the stone fragments from splashing and damaging the surrounding tissue in the process of stone crushing.
[0018] It can be applied to the cystolithotripsy under the cystoscope. In the operation process, the clamping forceps clamp the stone, the optical fiber transmits the laser to crush the stone, and the stone fragments can be wrapped inside the filter screen. After the stone crushing is completed, the controller is pushed away from the direction of the clamping forceps, and the clamping forceps are closed, so as to block the opening of the filter screen, so that the stone fragments are stored inside the filter screen. At this time, the holding part is pulled out of the patient's body, and the working part and the stone fragments wrapped inside the filter screen can be taken out together. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1 It is a perspective view of a laser fixator under an endoscope.
[0020] Figure 2It is a front view of the endoscope laser fixator of the utility model;
[0021] Figure 3 It is a plan view of the endoscope laser fixator of the utility model;
[0022] Figure 4 It is Figure 3 A-A sectional view;
[0023] Figure 5 It is Figure 4 Local enlarged view;
[0024] Figure 6 It is a sectional view of the sliding part of the utility model;
[0025] Figure 7 It is a perspective view of the working part of the utility model;
[0026] Figure 8 It is a side view of the working part of the utility model;
[0027] Figure 9 It is Figure 8 B-B sectional view;
[0028] In the figure, 1, holding part;2, controller;3, extension rod;4, working part;11, fixed handle;12, holding handle;13, slide;21, sliding handle;22, sliding sleeve;23, connection port;24, control rod;25, optical fiber;41, elastic filter screen;42, first clamping arm;43, second clamping arm;44, adjusting arm;421, connecting block;422, limiting block. DETAILED DESCRIPTION
[0029] In order to make the purpose, technical scheme and advantages of the present application more clear, the technical scheme of the present application will be described clearly and completely below by combining the specific embodiments of the present application and corresponding drawings. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0030] In this paper, "schematic" means "serves as an example, example or illustration", and any illustration, embodiment described as "schematic" in this paper should not be interpreted as a more preferred or more advantageous technical solution.
[0031] For the purpose of clarity, only the parts of the device that are related to the present application are shown in the drawings, which do not represent the actual structure of the product. In addition, in order to make the drawing simple and easy to understand, in some drawings, only one of the components with the same structure or function is shown schematically, or only one of them is marked.
[0032] In this article, it should be understood that the terms "center", "upper", "lower", "front", "back", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, only for the purpose of facilitating the description of the utility model and simplifying the description, and not indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model.
[0033] In this article, unless otherwise explicitly specified and limited, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance; unless otherwise specified or explained, the term "multiple" refers to two or more; the terms "connection", "fixation" and the like should be understood broadly, for example, "connection" can be fixed connection, or detachable connection, or integrally connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.
[0034] As shown in Figures 1-9 An endoscopic laser fixator, which comprises a holding part 1, a controller 2, an extension rod 3 and a working part 4; the holding part 1 and the extension rod 3 are arranged along an axis; one end of the controller 2 is in sliding connection with the holding part 1, and the other end penetrates through the extension rod 3; the inside of the controller 2 is provided with an optical fiber channel; the working part 4 is located at the end of the extension rod 3 away from the holding part 1; the working part 4 comprises a flexible filter screen 41, a clamping forceps and an adjusting arm 44; the clamping forceps is hinged with the extension rod 3; one end of the adjusting arm 44 is hinged with the clamping forceps, and the other end is hinged with the controller 2; a plurality of clamping forceps are arranged in a circumferential manner with the axis of the extension rod 3 as the center; the controller 2 is pushed towards the direction of the clamping forceps, the controller 2 drives the adjusting arm 44 to rotate, and drives the clamping forceps to open; the controller 2 is pushed away from the direction of the clamping forceps, the controller 2 drives the adjusting arm 44 to rotate in the opposite direction, and drives the clamping forceps to close. During the operation, the clamping forceps is opened and closed under the driving of the controller 2, so as to clamp the stones, so that the laser can be aligned with the stones, and the stones can be accurately broken. The flexible filter screen 41 is wrapped on the outer wall of the clamping forceps, which can wrap the stone fragments during the process of laser stone breaking, so as to prevent the stone fragments from splashing and damaging the surrounding tissues during the process of stone breaking.
[0035] Specifically, four clamping forceps are arranged.
[0036] Preferably, the elastic filter screen 41 is disposable, and the elastic filter screen 41 is detachably connected with the clamping forceps.
[0037] Specifically, the optical fiber channel coincides with the axis of the extension rod, so that the optical fiber 25 inside the optical fiber channel is located at the center of the extension rod. When the clamping forceps clamp the calculus, the optical fiber 25 inside the optical fiber channel can be directly opposite to the calculus.
[0038] Specifically, the optical fiber channel is internally provided with the optical fiber 25, and the gap between the optical fiber 25 and the optical fiber channel is much smaller than the diameter of the optical fiber 25. The optical fiber 25 is fixed inside the optical fiber channel, preventing the optical fiber 25 from shaking, and can accurately crush the calculus, avoiding damage to the surrounding tissues.
[0039] As shown in Figures 3-4 , the controller 2 comprises a sliding sleeve 22 and a control rod 24 arranged along an axis; the sliding sleeve 22 is slidably connected with the holding part 1; and the control rod 24 penetrates through the extension rod 3. During the operation, the sliding sleeve 22 is pushed towards the clamping forceps, so that the sliding sleeve 22 drives the control rod 24 to move towards the clamping forceps, drives the adjusting arm 44 to rotate, and makes the clamping forceps open; the sliding sleeve 22 is pushed away from the clamping forceps, so that the sliding sleeve 22 drives the control rod 24 to move away from the clamping forceps, drives the adjusting arm 44 to rotate in the opposite direction, and makes the clamping forceps close.
[0040] Further, as shown in Figures 3-4 , the outer wall of the sliding sleeve 22 is provided with a sliding handle 21. The sliding handle 21 serves to increase the holding area of the controller 2, facilitating the doctor to drive the sliding sleeve 22 to move, so as to control the opening and closing of the clamping forceps.
[0041] Specifically, as shown in Figure 6 , the outer wall of the sliding sleeve 22 is provided with a connecting port 23; the connecting port 23 is in communication with the optical fiber channel; the optical fiber 25 enters the optical fiber channel through the connecting port 23, and reaches the inside of the working part 4 along the optical fiber channel.
[0042] As shown in Figure 3 , 4 , and 6, the holding part 1 comprises a holding handle 12 and a sliding channel 13; the sliding channel 13 is located inside the holding handle 12; and the controller 2 slides along the sliding channel 13.
[0043] Preferably, the end of the holding handle 12 away from the extension rod 3 is fixedly connected with a fixed handle 11. The fixed handle 11 serves to increase the holding area of the holding handle 12, facilitating the doctor to drive the sliding sleeve 22 to move.
[0044] Specifically, the fixed handle 11 and the sliding handle 21 are internally provided with through holes, and in the operation process, the fingers can be inserted into the interior of the fixed handle 11 and the sliding handle 21, so as to drive the controller 2 to slide in the sliding channel 13 by the fingers, thereby realizing one-handed operation.
[0045] As shown in Figure 5 The clamping forceps comprise a first clamping arm 42 and a second clamping arm 43; the first clamping arm 42 and the second clamping arm 43 are detachably connected; the elastic filter screen 41 is in a tubular structure; the elastic filter screen 41 is wrapped outside the first clamping arm 42, and the two ends thereof are folded into the gap between the first clamping arm 42 and the second clamping arm 43. The purpose of this design is to facilitate the installation of the elastic filter screen 41. In the preoperative preparation process, the first clamping arm 42 and the second clamping arm 43 are separated, and then the elastic filter screen 41 is wrapped outside the first clamping arm 42, and the two ends of the elastic filter screen 41 are folded, and then the first clamping arm 42 is installed on the second clamping arm 43, so that the two ends of the elastic filter screen 41 are clamped in the gap between the first clamping arm 42 and the second clamping arm 43.
[0046] Preferably, the side of the first clamping arm 42 facing the second clamping arm 43 is provided with a protrusion; the side wall of the second clamping arm 43 is provided with a groove matched with the protrusion. In use, the two ends of the elastic filter screen 41 are aligned with the groove, and then the protrusion is inserted into the interior of the groove, and then the first clamping arm 42 and the second clamping arm 43 are assembled. The purpose of this design is to:
[0047] Increase the roughness between the first clamping arm 42 and the second clamping arm 43 to prevent the elastic filter screen 41 from being separated.
[0048] The protrusion and the groove play a limiting role to prevent the first clamping arm 42 and the second clamping arm 43 from shaking.
[0049] Specifically, as shown in Figures 6-9 The inner wall of the first clamping arm 42 is provided with a connecting block 421; the connecting block 421 passes through the second clamping arm 43 and is detachably connected with a limiting block 422, so as to realize the assembly of the first clamping arm 42 and the second clamping arm 43. The limiting block 422 abuts against the side of the second clamping arm 43 away from the first clamping arm 42.
[0050] The above is only a specific embodiment of the present application, and those skilled in the art can make other improvements or modifications on the basis of the above embodiments under the above teaching of the present application. Those skilled in the art should understand that the above specific description is only to better explain the purpose of the present application, and the protection scope of the present application should be subject to the protection scope of the claims.
Claims
1. An endoscopic laser fixator comprising a holding part, a controller, an extension rod and a working part, characterized in that, The holding part and the extension rod are arranged along an axis; one end of the controller is in sliding connection with the holding part, and the other end penetrates the extension rod; the inside of the controller is provided with an optical fiber channel; the working part is located at the end of the extension rod away from the holding part; the working part comprises an elastic filter screen, a clamping forceps and an adjusting arm; the clamping forceps is hinged to the extension rod; one end of the adjusting arm is hinged to the clamping forceps, and the other end is hinged to the controller; the clamping forceps is arranged in a circumferential manner with the axis of the extension rod as the center; the elastic filter screen is wrapped on the outer wall of the clamping forceps.
2. An endoscopic laser anchor according to claim 1, wherein, The inside of the optical fiber channel is provided with an optical fiber.
3. An endoscopic laser anchor according to claim 2, wherein, The clamping forceps comprises a first clamping arm and a second clamping arm; the first clamping arm and the second clamping arm are detachably connected; the elastic filter screen is in tubular structure; the elastic filter screen is wrapped on the outside of the first clamping arm, and both ends thereof are folded into the gap between the first clamping arm and the second clamping arm.
4. An endoscopic laser anchor according to claim 3, wherein, The inside wall of the first clamping arm is provided with a connecting block; the connecting block is in detachable connection with a limiting block after penetrating the second clamping arm; the limiting block is in abutment with the side of the second clamping arm away from the first clamping arm.
5. The endoscopic laser anchor of claim 3, wherein, The side of the first clamping arm facing the second clamping arm is provided with a protruding block; the side wall of the second clamping arm is provided with a groove matched with the protruding block.
6. An endoscopic laser anchor according to claim 2, wherein, The controller comprises a sliding sleeve and a control rod arranged along an axis; the sliding sleeve is in sliding connection with the holding part; the control rod penetrates the extension rod.
7. An endoscopic laser anchor according to claim 6, wherein, The outer wall of the sliding sleeve is provided with a sliding handle.
8. An endoscopic laser anchor according to claim 6, wherein, The outer wall of the sliding sleeve is provided with a connecting port; the connecting port is in communication with the optical fiber channel; the optical fiber enters the optical fiber channel through the connecting port and reaches the inside of the working part along the optical fiber channel.
9. The endoscopic laser anchor of claim 1, wherein, The holding part comprises a holding handle and a sliding channel; the sliding channel is located in the inside of the holding handle; the controller slides along the sliding channel.
10. The endoscopic laser anchor of claim 9, wherein, The end of the holding handle away from the extension rod is fixedly connected with a fixed handle.