Laser lithotripsy system, use method and optical fiber catheter preparation method
The laser lithotripsy system, which integrates laser fiber and irrigation branch pipe, solves the problem of unbalanced irrigation water volume during lithotripsy surgery, and achieves precise cooling of hot spots and control of intrarenal pressure by cooling water, thereby improving surgical safety and lithotripsy efficiency.
Patent Information
- Application Number
- CN202511966329.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-24
- Publication Date
- 2026-01-27
Smart Images
Figure CN121400965A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of medical device technology, specifically to a laser lithotripsy system, its usage method, and a method for preparing fiber optic catheters. Background Technology
[0002] In the field of ureteral lithotripsy in urology, holmium laser or thulium laser is currently the mainstream thermal ablation treatment method. Medical lithotripsy fiber optic cables serve as the core transmission medium for laser energy, reaching the stone surface through a visual catheter. The released laser energy is absorbed by the stone surface and surrounding water and tissue, instantly heating the water to a high-temperature vaporization state and simultaneously heating the surrounding water and tissue, forming high-temperature, high-pressure vapor bubbles. The shock waves released during the rapid expansion and collapse of these vapor bubbles, along with high-speed microjets, directly act on the stone, achieving a fragmentation effect. However, this process is accompanied by severe thermal effects: taking a commonly used 30W holmium laser as an example, the instantaneous temperature at the core point of the laser working surface is excessively high. Although this is a key mechanism for lithotripsy, the heat diffusion effect causes the temperature within 2mm of the core point to remain at 700–1400℃, far exceeding the 60℃ tolerance threshold of ureteral tissue. If the heat cannot dissipate in time, it can easily cause local tissue thermal damage, leading to iatrogenic complications.
[0003] To control the heat generated during lithotripsy, the current clinical practice routinely employs continuous perfusion of room temperature saline for cooling, using water flow to remove local heat. In these techniques, saline is injected into the surgical area via a visual catheter to remove heat. However, in actual surgery, due to differences in operator habits, insufficient perfusion or inefficient heat dissipation can easily occur, leading to local tissue thermal damage. On the other hand, operators may over-perfuse in an attempt to achieve the desired cooling effect, resulting in a significant increase in intrarenal pressure and increasing surgical safety risks. Furthermore, when perfusing cooling to the laser-generated hotspot, the gap between the sheath and the visual catheter is used as a return water channel for simultaneous aspiration. However, since the perfusion fluid outlet is often some distance from the laser-generated hotspot, operators need to pressurize the perfusion fluid to impact the lithotripsy hotspot, causing the perfusion fluid outlet direction to be inconsistent with the return water aspiration direction, easily generating high-speed rotating eddies. These eddies can then carry stone fragments within the area, causing tissue damage. Therefore, optimizing lithotripsy has become a pressing problem for practitioners. Summary of the Invention
[0004] In related techniques, the amount of irrigation water injected during lithotripsy is difficult to control and is prone to imbalance. This can easily lead to local tissue thermal damage (insufficient irrigation) and significant increase in intrarenal pressure (excessive irrigation) as well as tissue damage caused by eddies, creating a dual technical contradiction for surgical safety.
[0005] In a first aspect, embodiments of this application provide a laser lithotripsy system, which includes: a visual conduit and an optical fiber conduit; wherein... A visual catheter for inserting into the stone area, the visual catheter having a cavity inside; An optical fiber conduit is used to be movably inserted into the cavity of the visible conduit. A laser optical fiber and a water irrigation branch are fixed inside the optical fiber conduit. The first end of the laser optical fiber extends out of the optical fiber conduit and passes over the water outlet end face of the water irrigation branch, and the distance between the first end face of the laser optical fiber and the water outlet end face of the water irrigation branch is within a preset threshold range.
[0006] In conjunction with the first aspect, in one embodiment, the laser fiber is fixedly connected to the irrigation branch pipe via a thermorheological process.
[0007] In conjunction with the first aspect, in one implementation, it further includes: A laser therapy machine, which is connected to the laser fiber inside the optical fiber conduit; An injection device, which is connected to the water injection branch pipe inside the optical fiber conduit.
[0008] In conjunction with the first aspect, in one embodiment, the tail end of the laser fiber is separated from the irrigation branch and connected to the laser therapy machine, so that the fiber optic conduit is Y-shaped.
[0009] In conjunction with the first aspect, in one embodiment, an extension fiber is provided at the tail end of the laser fiber, and the extension fiber is connected to the laser therapy machine.
[0010] In conjunction with the first aspect, in one embodiment, it further includes: a sheath having a channel through which the visual conduit passes, and a return water channel being provided between the sheath and the visual conduit.
[0011] In conjunction with the first aspect, in one embodiment, the visual catheter is equipped with an image recognition device, which is used to monitor the distance between the first end of the laser fiber and the target stone.
[0012] In conjunction with the first aspect, in one embodiment, the laser fiber is provided with navigation marks and scale markings at its leading end.
[0013] Secondly, embodiments of this application provide a method for using the aforementioned laser lithotripsy system, comprising: After inserting the visual catheter into the stone area, drive the fiber optic catheter along the cavity of the visual catheter until the tip of the laser fiber reaches the stone area. Adjust the position of the fiber optic conduit to keep the distance between the tip of the laser fiber and the target stone within a preset distance range; The laser fiber is controlled to perform laser lithotripsy, while irrigation fluid is delivered to the lithotripsy area at a preset flow rate through the irrigation branch pipe.
[0014] Thirdly, this application provides a method for preparing an optical fiber conduit, which includes: attaching laser optical fibers in parallel to the outer wall of a water-filling branch pipe to form a pre-treated conduit structure; covering the pre-treated conduit structure with a thin film; and using a thermorheological process to integrate the laser optical fibers and the water-filling branch pipe into an optical fiber conduit.
[0015] The beneficial effects of the technical solutions provided in this application include: The applicant's research found that the problem of unbalanced irrigation water volume during lithotripsy surgery stems from the difficulty in controlling the distance between the cooling medium and the hot spot due to differences in operator habits. If the distance between the visual catheter port (i.e., the outlet of traditional equipment during surgery) and the fiber optic tip is too great, a large amount of irrigation fluid will not be fully involved in local cooling and will be recovered through the gap between the visual catheter and the sheath under negative pressure, resulting in low cooling efficiency. Consequently, operators may increase the irrigation volume to avoid thermal damage, leading to a more serious increase in intrarenal pressure. This application addresses this issue by integrating the laser fiber and irrigation branch. During surgery, the fiber optic tip and the cooling water outlet move synchronously, with fine adjustments automatically performed by image recognition. This ensures that the distance between the cooling medium and the hot spot remains within a preset range throughout the surgery, achieving targeted delivery of cooling water to the laser hot spot. This technical solution enables controllable cooling of the perfusion fluid, facilitating precise calculation of the perfusion flow rate. This allows the perfusion fluid to meet the precise cooling needs of the hot spot area while effectively avoiding the risk of increased intrarenal pressure caused by excessive perfusion, thus completely resolving the long-standing clinical pain point of uncontrolled intrarenal pressure in laser lithotripsy. Furthermore, because the perfusion fluid outlet and the laser hot spot are synchronized, the perfusion fluid directly cools the hot spot after flowing out and then returns through the return channel between the sheath and the visual catheter. Throughout the process, the perfusion fluid flows in a consistent direction, greatly reducing the possibility of high-speed eddies, thereby preventing tissue damage caused by stone fragments rotating with the eddies and improving surgical safety. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is a schematic diagram of the laser lithotripsy system in the embodiments of this application; Figure 2This is a schematic diagram of the end face of an optical fiber guide tube in one embodiment of this application.
[0018] In the diagram: 1. Visual catheter; 2. Fiber optic catheter; 21. Laser fiber; 211. Fiber optic ball head; 22. Irrigation branch pipe; 221. Outlet end face; 3. Image recognition device; 4. Target stone; 5. Laser therapy machine; 6. Irrigation device; 7. Sheath; 71. Return water channel. Detailed Implementation
[0019] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.
[0020] In related techniques, the amount of irrigation water injected during lithotripsy is difficult to control and is prone to imbalance. This can easily lead to local tissue thermal damage (insufficient irrigation) and significant increase in intrarenal pressure (excessive irrigation) as well as tissue damage caused by eddies, creating a dual technical contradiction for surgical safety.
[0021] It should be noted that the applicant's research found the main reason for the aforementioned problems is that the distance between the position of the visual catheter and the fiber optic tip used for laser lithotripsy is difficult to maintain within an appropriate range due to operator habits. When the distance between the visual catheter port and the fiber optic tip is too great, a large amount of perfusion fluid fails to adequately participate in local cooling. On the one hand, this significantly reduces cooling efficiency, with most of the perfusion fluid failing to effectively cool the area, ultimately making the ureteral tissue susceptible to thermal damage and leading to a series of iatrogenic diseases. On the other hand, to achieve cooling and avoid thermal damage, operators may increase the amount of perfusion fluid used, significantly increasing intrarenal pressure, which is a prominent safety hazard in urological surgery. Therefore, optimizing lithotripsy surgery has become a pressing problem for practitioners.
[0022] It is worth noting that excessive infusion of water leading to increased intrarenal pressure is a fatal risk in laser lithotripsy, with its harm occurring both during and after the procedure (procedural complications) and postoperatively (kidney function damage, infection), and in severe cases, it can lead to the patient's death.
[0023] In a first aspect, this application provides a laser lithotripsy system, comprising: a visual conduit 1 and an optical fiber conduit 2; wherein, The fiber optic conduit 2 has a laser fiber 21 and a water irrigation branch pipe 22 fixed inside it. The first end of the laser fiber 21 extends out of the fiber optic conduit 2 and passes over the water outlet end face of the water irrigation branch pipe 22. The distance between the first end face of the laser fiber 21 and the water outlet end face 221 of the water irrigation branch pipe 22 is within a preset threshold range. The visual conduit 1 is used to extend into the stone area. The visual conduit 1 has a cavity through which the fiber optic conduit 2 passes.
[0024] It is worth noting that the laser fiber 21's tip is the laser emission point and needs to be cooled by cooling water in a timely manner. This application fixes the laser fiber 21 and the irrigation branch pipe 22 in a fixed position, preventing relative movement between them. This ensures that the distance between the fiber ball head 211 at the tip of the laser fiber 21 and the water outlet face 221 of the irrigation branch pipe 22 remains constant, guaranteeing that the cooling water can instantly cover the laser's point of action. This design is fundamentally different from traditional methods of water cooling where the water outlet and the laser heat generation point are not synchronized (separation of cooling point and heat generation point). This effectively suppresses the heat diffusion effect, maintaining the local temperature within the ureteral tissue's tolerance threshold and preventing mucosal necrosis or stenosis caused by heat damage. Simultaneously, this design prevents excessive irrigation from causing increased intrarenal pressure, significantly improving surgical safety. Furthermore, because the irrigation fluid outlet and the laser heat generation point are synchronized, the irrigation fluid directly cools the heat generation point after flowing out and then returns through the return channel between the sheath and the visual catheter. Throughout the process, the irrigation fluid flows in a consistent direction, which greatly reduces the possibility of high-speed eddies, thereby avoiding damage to tissues from stone fragments carried by the eddies and improving surgical safety.
[0025] Furthermore, the preset threshold range can be determined based on the equipment specifications.
[0026] In some preferred embodiments, such as Figure 1 As shown, the laser fiber 21 and the irrigation branch pipe 22 are arranged in parallel and attached. In order to maintain the permeability and reduce the risk of tissue damage, the fiber ball head 211 of the laser fiber 21 is located 3mm-5mm in front of the water outlet end face 221 of the irrigation branch pipe 22, and the maximum transverse diameter of the fiber ball head 211 does not exceed 0.5mm.
[0027] It is worth noting that by controlling the water outlet of the water injection branch pipe 22 and the action point of the laser fiber 21 within a suitable range, the cooling effect of the injection fluid in the water injection branch pipe 22 is steadily improved, thereby saving the amount of injection fluid used and reducing costs.
[0028] In some alternative implementations, a protective sleeve is installed at the fiber optic ball head 211 to prevent damage to the fiber end face during the process.
[0029] In some specific embodiments, the laser lithotripsy system further includes: a laser therapy machine 5 and an infusion device 6; wherein, The laser therapy machine 5 is connected to the laser fiber 21 inside the fiber optic conduit 2; the irrigation device 6 is connected to the irrigation branch pipe 22 inside the fiber optic conduit 2.
[0030] In a first specific embodiment of this application, such as Figure 1 As shown, the end of the laser fiber 21 is separated from the irrigation branch pipe 22 and connected to the laser therapy machine 5 through a connector. The irrigation branch pipe 22 serves as an extension pipe connected to the water supply interface and the irrigation device 6, so that the fiber optic conduit 2 is Y-shaped as a whole.
[0031] Understandably, the Y-shaped fiber optic conduit 2 allows the laser fiber 21 to be independently connected to the irrigation branch pipe 22, simplifying system maintenance and operation procedures, reducing the obstruction of cooling water flow caused by path interference, ensuring that the laser and irrigation functions do not conflict with each other, and improving the reliability and convenience of surgical operations.
[0032] Furthermore, to ensure structural stability, the separation point between the laser fiber 21 and the irrigation branch pipe 22 is fixed with a metal ring of appropriate length.
[0033] In a second specific embodiment of this application, an extension fiber is connected to the tail end of the laser fiber 21, and the spliced fiber extends directly to the coupling end of the laser therapy machine 5. The irrigation branch pipe 22 operates independently, simplifying the distal structure.
[0034] It is worth noting that the extended fiber optic design enhances the flexibility of laser transmission, adapts to the equipment layout requirements of different surgical scenarios, avoids operational limitations caused by excessively short connecting cables, improves system applicability and surgical smoothness, and ensures stable transmission of laser energy.
[0035] Optionally, such as Figure 1 As shown, the laser lithotripsy system also includes a sheath 7, which has a channel for the visual conduit 1 to pass through, and the gap between the sheath 7 and the visual conduit 1 is a return water channel 71.
[0036] Understandably, the return water channel 71 is used to simultaneously draw out the perfusion fluid while water is injected into the perfusion branch tube 22 to alleviate the problem of increased intrarenal pressure, assist in controlling local temperature, and work with cooling water to reduce the risk of thermal damage, thereby further optimizing the safety of the surgical environment.
[0037] In some alternative embodiments, the visual catheter 1 is provided with an image recognition device 3, which is used to monitor the distance between the tip of the laser fiber 21 and the target stone 4.
[0038] It is worth noting that the image recognition device 3 is used to assist in real-time monitoring of the relative distance between the fiber optic ball head and the stone, ensuring that the lithotripsy process is carried out within the preset safe range, avoiding fiber optic damage caused by the laser being too close or tissue thermal damage caused by the relative position change of the fiber optic stone, thereby improving lithotripsy accuracy and surgical controllability.
[0039] In the above optional embodiments, the laser fiber 21 is provided with navigation marks and scale markings at its tip. Optionally, the navigation marks are colored areas on the tip of the laser fiber 21 extending out of the fiber optic conduit 2. Specifically, the tip of the laser fiber 21 is sphericalized to form a fiber optic ball head 211 and fluorescently stained to facilitate subsequent automatic fine-tuning of the distance using image recognition.
[0040] Understandably, navigation markers are used to enhance the accuracy of image recognition equipment in identifying the position of optical fibers, reduce monitoring errors, enable rapid and accurate adjustment of the distance between the optical fiber ball head and the stone, eliminate differences in operator subjective judgment, and improve surgical consistency.
[0041] In some preferred embodiments, the laser fiber 21 is fixed to the irrigation branch pipe 22 by a thermorheological process.
[0042] Understandably, the thermorheological integral molding structure eliminates the sealing gaps of traditional split connections, thereby reducing the volume of the fiber optic catheter 2 to meet surgical needs.
[0043] Secondly, the fiber optic conduit 2 fabrication process provided in this application.
[0044] In the first specific embodiment, the preparation method includes: Step A: The laser fiber 21 is integrated with the irrigation branch pipe 22.
[0045] Specifically, the semi-finished optical fiber without the ETFE layer is fixed in parallel to the wall of the irrigation branch pipe 22 (which can be a capillary pipe) that can serve as an irrigation channel, thereby achieving the integrated structure of the two.
[0046] Step B: Thermal flux transformation.
[0047] Specifically, the semi-finished optical fiber is placed on the surface of a flexible substrate with a core (the flexible substrate can be a thin film tube or a micro-conduit composed of a thin film and a metal wire), and then the aforementioned structure is covered with a thin-walled flexible tubular material (such as a nylon thin film tube). The laser optical fiber 21 and the water filling branch pipe 22 are stably fixed through a thermorheological process.
[0048] Step C: Processing the tail end of fiber optic conduit 2.
[0049] In the first embodiment of this application, the optical fiber conduit 2 adopts a Y-shaped branch structure. The tail end of the semi-finished laser optical fiber 21 is exposed by 10mm, and the other end passes through the outer layer material at a predetermined position, separating from the wall of the water-filling branch pipe 22 to form a Y-shaped structure. The optical fiber portion is used to complete the connector coupling (later used for connection with the laser therapy machine 5), and the water-filling branch pipe 22 serves as an extension pipe connecting to the water supply interface. The separation point is fixed with a metal ring of appropriate length to ensure structural stability.
[0050] In the second embodiment of this application, a fiber optic thermal splicing extension scheme is adopted. The tail end of the semi-finished fiber is connected to an extension fiber, and the spliced fiber extends directly to the coupling end of the equipment. The water filling branch pipe 22 operates independently, simplifying the remote structure.
[0051] Step D: Forming and processing of fiber optic catheters. After the above-mentioned thermorheological process, an integrated fiber optic catheter is formed. Subsequent targeted processing is required to adapt to clinical needs.
[0052] Step E: Fiber optic head end processing.
[0053] Specifically, the portion of the laser fiber 21 extending out of the fiber optic conduit 2 (approximately 10 mm in length) is colored to form a navigation mark. Simultaneously, the tip of the laser fiber 21 is finely trimmed and fused to form a ball head 211.
[0054] Preferably, the fiber optic ball head 211 is located 3-5 mm in front of the water outlet end face 221 (i.e., the water outlet) of the water filling branch pipe 22, and the maximum transverse diameter of the fiber optic ball head 211 does not exceed 0.5 mm.
[0055] Step F: Catheter length determination.
[0056] In some specific embodiments, the total length of the integrated fiber optic catheter is precisely trimmed to a specification of 1500mm to 4000mm according to the needs of different clinical anatomical structures and surgical paths, ensuring clinical applicability.
[0057] In a second specific embodiment of the above preparation method, the preparation method includes: Step A: Prepare irregularly shaped pipes.
[0058] Specifically, irregularly shaped pipes, such as Figure 2 As shown, its end face has two cavities.
[0059] Step B: Insert the laser fiber 21 into one of the cavities of the irregularly shaped pipe and fix the laser fiber 21 by adhesive welding.
[0060] Understandably, the irregularly shaped pipe has two cavities, one for the installation of optical fibers and the other for use as a water filling branch pipe 22.
[0061] Step C: After processing the head end of the laser fiber 21, a fiber optic ball head is formed. The tail end of the irregularly shaped pipe is bifurcated to form a Y-shaped structure.
[0062] Understandably, the two ends of the Y-shaped structure are respectively used for connecting the laser fiber 21 to the laser therapy machine 5, and the other end of the cavity serves as a water irrigation branch pipe 22 to connect with the irrigation equipment.
[0063] In summary, this application leverages the fixed positional characteristics of the integrated structure to achieve "synchronous adjustment of the light focusing position and the cooling position," with the outlet position of the water supply branch pipe 22 synchronously adapted to maintain close proximity to the heat source, thus achieving a precise cooling effect of "light and water in place." Furthermore, this application employs a thermorheological process to fix the laser fiber 21 and the water supply branch pipe 22 in parallel, forming an integrated structure. Through a Y-shaped branch structure or a fiber optic thermal splicing extension scheme, it achieves functional separation and coordinated operation of energy transmission and cooling medium delivery, ensuring close proximity between the capillary water outlet and the heat source at the fiber optic tip.
[0064] Thirdly, this application provides a method of using the laser lithotripsy system as described in any of the above embodiments, comprising: Step S1: After inserting the visual catheter 1 into the stone area, drive the fiber optic catheter 2 to move along the cavity of the visual catheter 1 until the head end of the laser fiber 21 reaches the stone area.
[0065] Step S2: Adjust the position of the fiber optic conduit 2 so that the distance between the fiber optic ball head 211 of the laser fiber 21 and the target stone 4 is kept within the preset distance range.
[0066] Specifically, the image recognition device 3 identifies the navigation mark of the laser fiber 21 and the target stone 4 to obtain the fiber position information and stone position information at the beginning of the laser fiber 21; the position of the fiber optic conduit 2 is adjusted according to the fiber position information and stone position information so that the distance between the fiber ball head 211 and the target stone 4 is kept within a preset distance range.
[0067] It is worth noting that this application uses image recognition to automatically fine-tune the position of the laser fiber 21, thereby maximizing the stone crushing efficiency and minimizing the time.
[0068] Step S3: Drive the laser fiber 21 to perform stone crushing, and at the same time, inject water into the stone crushing area through the water injection branch pipe 22 at a preset flow rate, and use the return water channel 71 in conjunction with the negative pressure suction device to extract the injection fluid in real time.
[0069] It should be noted that this invention achieves targeted delivery of cooling water to the laser-generated hot spot through an integrated design of optical fiber and capillary tube and a precise positioning process. This technical solution makes the cooling effect of the perfusion fluid controllable. By precisely controlling the perfusion flow rate within a preset range, operators can meet the precise cooling needs of the hot spot area while effectively avoiding the risk of increased intrarenal pressure caused by excessive perfusion, thus completely solving the long-standing clinical pain point of uncontrolled intrarenal pressure in laser lithotripsy.
[0070] To further illustrate, this application provides a specific embodiment of the infusion step, in which: a 30W holmium laser is used to break up lithotripsy in the ureter (with an inner diameter of about 4mm), and 23°C physiological saline is precisely infused into the first end of the optical fiber. An infusion flow rate of about 21.5mL / min is required to reduce the water temperature to 43°C, thus achieving efficient cooling.
[0071] Furthermore, the calculation steps for the perfusion flow rate of physiological saline in the above specific embodiments include: Step A: Calculate the perfusion mass flow rate of physiological saline.
[0072] According to the heat balance formula: P 有效 =q m ·C p ·△T Calculate mass flow rate q m In the formula, P 有效 Let P be the effective power of the laser (assuming all laser energy is absorbed by water and there is no other heat loss). 有效 =30W=30J / s). q m Mass flow rate of physiological saline (unit: kg / s); C p The isobaric specific heat capacity of physiological saline (approximately equal to the specific heat capacity of water, Cp = 4.186 × 10⁻⁶) 3 J / (kg·℃); △T is the water temperature rise (△T=43℃-23℃=20℃).
[0073] Specifically, substitute the value: q m =30 / (4.186*1000*20) ≈3.58×10 -4 kg / s Step B: Calculate the preset flow rate.
[0074] The specific calculation formula is: Qρ = 3.58 × 10 -4 kg / s×60s / min≈0.0215L / min=21.5mL / min It is worth noting that by using the preset flow rate calculated above to perfuse and cool the hot spot area, efficient cooling is achieved while ensuring that there is no risk of intrarenal pressure runaway.
[0075] In summary, this application leverages the fixed positional characteristics of its integrated structure to achieve "synchronous adjustment of the light focusing position and the cooling position." When the fiber optic head position is fine-tuned using image recognition technology to maximize lithotripsy efficiency, the capillary water outlet position adapts synchronously, always maintaining close proximity to the hot spot, achieving a precise cooling effect of "light and water in place." Furthermore, this application employs a thermorheological process (fixing the laser-free fiber and the irrigation branch pipe in parallel to form an integrated structure; using a Y-shaped branch structure or fiber thermal splicing extension scheme to achieve functional separation and coordinated operation of energy transmission and cooling medium delivery, ensuring close proximity between the capillary water outlet and the hot spot at the fiber optic head). Finally, this application performs coloring, trimming, and protective sleeve installation on the fiber optic head. On the one hand, coloring enables computer image recognition positioning, precisely controlling the distance between the fiber optic head and the stone; on the other hand, it strictly controls the size and position of the bulb, ensuring surgical safety and accessibility.
[0076] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.
[0077] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0078] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.
Claims
1. A laser lithotripsy system, characterized in that, include: The fiber optic conduit (2) is equipped with a laser fiber (21) and a water-filling branch pipe (22). The first end of the laser fiber (21) extends out of the fiber optic conduit (2) and passes over the water outlet end face of the water-filling branch pipe (22). The distance between the first end face of the laser fiber (21) and the water outlet end face (221) of the water-filling branch pipe (22) is within a preset threshold range. A visual catheter (1) is used to extend into the stone area, and the visual catheter (1) has a cavity through which the optical fiber catheter (2) passes.
2. The laser lithotripsy system as described in claim 1, characterized in that: The laser fiber (21) is fixedly connected to the irrigation branch pipe (22) by thermorheological process.
3. The laser lithotripsy system as described in claim 2, characterized in that, Also includes: A laser therapy machine (5) is connected to the laser fiber (21) inside the fiber optic conduit (2); The irrigation device (6) is connected to the irrigation branch pipe (22) inside the optical fiber conduit (2).
4. The laser lithotripsy system as described in claim 3, characterized in that: The end of the laser fiber (21) is separated from the irrigation branch pipe (22) and connected to the laser therapy machine (5) so that the fiber optic conduit (2) is Y-shaped.
5. The laser lithotripsy system as described in claim 3, characterized in that: An extension fiber is provided at the end of the laser fiber (21), and the extension fiber is connected to the laser therapy machine (5).
6. The laser lithotripsy system as described in claim 1, characterized in that, Also includes: The sheath (7) has a channel through which the visual conduit (1) passes, and a return water channel (71) is provided between the sheath (7) and the visual conduit (1).
7. The laser lithotripsy system as described in claim 1, characterized in that: The visual catheter (1) is equipped with an image recognition device (3), which is used to monitor the distance between the head end of the laser fiber (21) and the target stone (4).
8. The laser lithotripsy system as described in claim 7, characterized in that: The laser fiber (21) has navigation marks and scale markings at its head end.
9. A method of using the laser lithotripsy system as described in claim 1, characterized in that, include: After inserting the visual catheter (1) into the stone area, drive the fiber optic catheter (2) to move along the cavity of the visual catheter (1) until the head end of the laser fiber (21) reaches the stone area. Adjust the position of the fiber optic conduit (2) so that the distance between the head end of the laser fiber (21) and the target stone (4) is kept within the preset distance range; The laser fiber (21) is controlled to perform laser lithotripsy, while the irrigation fluid is delivered to the lithotripsy area at a preset flow rate through the irrigation branch pipe (22).
10. A method for fabricating an optical fiber conduit, characterized in that, include: Laser optical fibers (21) are attached in parallel to the outer wall of the irrigation branch pipe (22) to form a pre-treated conduit structure; The pre-treated conduit structure is coated with a thin film, and the laser fiber (21) and the water filling branch pipe (22) are integrated into an optical fiber conduit using a thermorheological process.