Laser resectoscope

Abstract

The laser resectoscope comprises a sheath assembly, a laser hand part, a laser optical fiber and an electronic endoscope, the sheath assembly comprises an inner sheath and an outer sheath, the inner sheath is arranged in the outer sheath, the electronic endoscope comprises an endoscope tube, the laser optical fiber and the endoscope tube are arranged in the inner sheath in a penetrating mode, a light channel tube is arranged on the outer side of the laser optical fiber, and the laser hand part is arranged in the light channel tube. The head of the laser optical fiber protrudes out of the light channel pipe, a lens end is arranged at the head end of the lens pipe, an image sensor is installed in the lens end, and protective glass is installed on the outer side of the image sensor. The electronic endoscope is adopted for imaging, and an electronic camera system is mature, low in cost and simple in process; the field angle of the image sensor is large, and the visual range is wide; the head end of the image sensor is large, the rear end is a thin wire, and the overall outer diameter can be reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of electrosurgical resection instruments, and in particular to the technical field of laser electrosurgical resection instruments. Background Technology

[0002] In laser resection of the prostate (LR) surgery, optical endoscopes are typically used. However, optical endoscopes are expensive, difficult to manufacture, have limited field of view, and the diameter of the endoscope tube is inversely proportional to image quality. Various technical specifications have reached a bottleneck. While electronic endoscopes are gaining increasing advantages in other fields, they remain unexplored in laser resection of the prostate. This is because applying electronic endoscopes to laser resection of the prostate presents the following challenges:

[0003] 1. The optical frequency interference generated by the electrical cutting ring has a significant impact on close-range cameras, making the captured images more prone to stripes or noise, resulting in unclear images;

[0004] 2. The heat generated by the electric cutting ring during operation has a significant impact on the camera and can easily damage it;

[0005] 3. The characteristic of an optical electrosurgical resection endoscope is that the optical endoscope rotates while the camera attached to the back remains stationary to ensure image orientation. However, with an electronic endoscope, the camera is positioned in front, so the camera also rotates, causing the captured image to rotate as well. This image rotation can lead to a deviation in the doctor's perception of the operation direction. Summary of the Invention

[0006] The purpose of this invention is to solve the problems in the prior art by proposing a laser electrosurgical cutting mirror that can solve the above problems.

[0007] To achieve the above objectives, this utility model proposes a laser electrosurgical endoscope, comprising a sheath assembly, a laser handpiece, a laser fiber, and an electronic endoscope. The sheath assembly includes an inner sheath and an outer sheath, with the inner sheath disposed within the outer sheath. The electronic endoscope includes a tube, with the laser fiber and the tube passing through the inner sheath. A light channel is provided on the outer side of the laser fiber, and the head of the laser fiber protrudes from the light channel. A lens end is provided at the head end of the tube, and an image sensor is installed inside the lens end. A protective glass is installed on the outer side of the image sensor.

[0008] Preferably, the optical channel tube is positioned below the image sensor, and a beam guide is positioned above the image sensor.

[0009] Preferably, an operating slider is slidably mounted on the laser handpiece, the operating slider is connected to the laser fiber, a sensor mounting base is fixed on the laser handpiece, and a distance sensor is fixed on the sensor mounting base.

[0010] Preferably, the diameter of the lens end is larger than the diameter of the lens tube, and there is a smooth transition between the lens end and the lens tube.

[0011] Preferably, the protective glass is coated with a cutoff film, and the light transmission wavelength range is between 780 and 400 nm.

[0012] Preferably, the handle of the electronic endoscope is equipped with a signal adapter board containing an angle sensor.

[0013] Preferably, the gap between the inner sheath and the outer sheath is the area of ​​the water outlet channel, and the gap between the inner sheath and the endoscope tube is the area of ​​the water inlet channel.

[0014] Preferably, the image sensor is tilted toward the laser fiber, forming a viewing angle θ of 0 to 30° with the central axis of the sheath assembly.

[0015] Preferably, the distance sensor includes a photoelectric sensor, a spring, a fixed rod, and a telescopic rod. The fixed rod is fixed to the sensor mounting base and has a mounting groove inside. The photoelectric sensor is located at the end of the mounting groove away from the operating slider. The telescopic rod is slidably mounted at the end of the mounting groove near the operating slider. The end of the telescopic rod protrudes from the fixed rod and has a limiting part. A spring is provided between the limiting part and the mounting groove.

[0016] The beneficial effects of this utility model are as follows: This utility model uses electronic endoscope imaging, which is a mature, low-cost, and simple process; the image sensor has a large field of view and a wide viewing range; the image sensor has a large head and a thin wire at the rear, which can reduce the overall outer diameter and reduce pain, or increase the water inlet and outlet area within the same outer diameter, thus increasing the clarity of the field of view; the angle sensor corrects the image during rotation, thereby realizing the image orientation function; the protective glass is coated with a cutoff film, which eliminates or reduces the influence of the related wavebands generated when using the laser fiber on the image sensor; the distance sensor can prevent the laser fiber from getting too close to the image sensor during operation, avoiding damage to the lens of the electronic endoscope; the large head and thin wire at the rear of the image sensor, when used to manufacture a mirror tube with the same structure, can effectively increase the total water inlet and outlet area, which can promptly replace blood and fluid caused by surgery to maintain a clear field of view, and promptly drain excised tissue to avoid blocking the channel.

[0017] The features and advantages of this utility model will be described in detail through embodiments and accompanying drawings. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is an internal schematic diagram of the present invention;

[0020] Figure 3This is a schematic diagram of the laser fiber installation of this utility model;

[0021] Figure 4 This is a schematic diagram of the lens end structure of this utility model;

[0022] Figure 5 This is a schematic diagram of the operating slider structure of this utility model;

[0023] Figure 6 This is a schematic diagram of the image sensor installation of this utility model;

[0024] Figure 7 This is a schematic diagram of the inner and outer sheath structures of this utility model;

[0025] Figure 8 This is a schematic diagram of the distance sensor structure of this utility model.

[0026] In the diagram: 1. Sheath assembly; 2. Laser handpiece; 3. Laser fiber; 4. Electronic endoscope; 5. Distance sensor; 6. Beam guide; 11. Inner sheath; 12. Outer sheath; 13. Water outlet channel; 14. Water inlet channel; 21. Operating slider; 22. Sensor mounting base; 31. Optical tube; 41. Endoscope tube; 42. Lens end; 43. Image sensor; 44. Protective glass; 51. Photoelectric sensor; 52. Spring; 53. Fixing rod; 54. Telescopic rod; 55. Mounting slot; 56. Limiting part. Detailed Implementation

[0027] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0028] Furthermore, it should be understood in the description of this application that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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. Therefore, they should not be construed as limitations on this application.

[0029] See Figures 1 to 8A laser electrosurgical endoscope includes a sheath assembly 1, a laser handpiece 2, a laser fiber 3, and an electronic endoscope 4. The sheath assembly 1 includes an inner sheath 11 and an outer sheath 12, with the inner sheath 11 disposed within the outer sheath 12. The electronic endoscope 4 includes a tube 41, with the laser fiber 3 and the tube 41 passing through the inner sheath 11. A light channel tube 31 is provided on the outer side of the laser fiber 3, and the head of the laser fiber 3 protrudes from the light channel tube 31. A lens end 42 is provided at the head end of the tube 41, and an image sensor 43 is installed inside the lens end 42. A protective glass 44 is installed on the outer side of the image sensor 43.

[0030] The optical channel tube 31 is disposed below the image sensor 43, and the image sensor 43 is provided with a beam guide 6 above it.

[0031] An operating slider 21 is slidably mounted on the laser handpiece 2. The operating slider 21 is connected to the laser fiber 3. A sensor mounting base 22 is fixed on the laser handpiece 2. A distance sensor 5 is fixed on the sensor mounting base 22.

[0032] The diameter of the lens end 42 is larger than the diameter of the lens tube 41, and there is a smooth transition between the lens end 42 and the lens tube 41.

[0033] The protective glass 44 is coated with a cutoff film on the side closest to the image sensor, and the light transmission wavelength range is between 780 and 400 nm.

[0034] The cutoff membrane blocks the emission wavelength of the laser, effectively shielding and reducing the interference of the laser band on the image sensor.

[0035] The handle of the electronic endoscope 4 is equipped with a signal adapter board containing an angle sensor.

[0036] During use, the rotation angle of the electronic endoscope is sensed by an angle sensor. Based on the angle data provided by the angle sensor, the captured image is processed using a corresponding image rotation algorithm. Common algorithms include matrix transformation-based rotation algorithms, which calculate the new position of each pixel in the image after rotation, rotate the image, and correct the image angle deviation caused by the camera rotation, so that the image is kept in the predetermined direction.

[0037] The gap between the inner sheath 11 and the outer sheath 12 is the area of ​​the water outlet channel 13, and the gap between the inner sheath 11 and the endoscope tube 41 is the area of ​​the water inlet channel 14.

[0038] The image sensor 43 is tilted toward the laser fiber 3, forming a viewing angle θ of 0 to 30° with the central axis of the sheath assembly 1.

[0039] The image sensor's field of view ω is available in 90° and 120°.

[0040] The distance sensor 5 includes a photoelectric sensor 51, a spring 52, a fixed rod 53, and a telescopic rod 54. The fixed rod 53 is fixed on the sensor mounting base 22. The fixed rod 53 has a mounting groove 55. The photoelectric sensor 51 is located at the end of the mounting groove 55 away from the operating slider 21. The telescopic rod 54 is slidably mounted at the end of the mounting groove 55 near the operating slider 21. The end of the telescopic rod 54 protrudes from the fixed rod 53. The telescopic rod 54 has a limiting part 56. The spring 52 is located between the limiting part 56 and the mounting groove 55.

[0041] When the operating slider is not in operation or has not reached the designated position, the telescopic rod is squeezed by the operating slider, the spring is compressed, and the end of the telescopic rod is sensed by the photoelectric sensor. Even if the working switch of the control laser fiber is turned on, the laser will not work. The laser can only work when the photoelectric sensor is not sensed, thus protecting the endoscope from damage caused by the heat generated by the laser due to excessive distance.

[0042] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. A laser electrosurgical cutting instrument, characterized in that: The device includes a sheath assembly (1), a laser handpiece (2), a laser fiber (3), and an electronic endoscope (4). The sheath assembly (1) includes an inner sheath (11) and an outer sheath (12). The inner sheath (11) is disposed in the outer sheath (12). The electronic endoscope (4) includes a tube (41). The laser fiber (3) and the tube (41) pass through the inner sheath (11). The outer side of the laser fiber (3) is provided with a light channel tube (31). The head of the laser fiber (3) protrudes from the light channel tube (31). The head end of the tube (41) is provided with a lens end (42). An image sensor (43) is installed inside the lens end (42). A protective glass (44) is installed on the outer side of the image sensor (43).

2. The laser electrosurgical cutting mirror as described in claim 1, characterized in that: The optical tube (31) is located below the image sensor (43), and a beam guide (6) is located above the image sensor (43).

3. The laser electrosurgical cutting mirror as described in claim 1, characterized in that: An operating slider (21) is slidably mounted on the laser handpiece (2). The operating slider (21) is connected to the laser fiber (3). A sensor mounting base (22) is fixed on the laser handpiece (2). A distance sensor (5) is fixed on the sensor mounting base (22).

4. The laser electrosurgical cutting mirror as described in claim 1, characterized in that: The diameter of the lens end (42) is larger than the diameter of the lens tube (41), and there is a smooth transition between the lens end (42) and the lens tube (41).

5. The laser electrosurgical cutting instrument as described in claim 1, characterized in that: The protective glass (44) is coated with a stop film.

6. The laser electrosurgical cutting mirror as described in claim 1, characterized in that: The handle of the electronic endoscope (4) is equipped with a signal adapter board containing an angle sensor.

7. The laser electrosurgical cutting mirror as described in claim 4, characterized in that: The gap between the inner sheath (11) and the outer sheath (12) is the area of ​​the water outlet channel (13), and the gap between the inner sheath (11) and the endoscope tube (41) is the area of ​​the water inlet channel (14).

8. The laser electrosurgical cutting mirror as described in claim 1, characterized in that: The image sensor (43) is tilted toward the laser fiber (3) and forms a viewing angle θ of 0 to 30° with the central axis of the sheath assembly (1).

9. The laser electrosurgical resection mirror as described in claim 3, characterized in that: The distance sensor (5) includes a photoelectric sensor (51), a spring (52), a fixed rod (53), and a telescopic rod (54). The fixed rod (53) is fixed on the sensor mounting base (22). The fixed rod (53) has a mounting groove (55). The photoelectric sensor (51) is located at one end of the mounting groove (55) away from the operating slider (21). The telescopic rod (54) is slidably mounted at one end of the mounting groove (55) near the operating slider (21). The end of the telescopic rod (54) protrudes from the fixed rod (53). The telescopic rod (54) has a limiting part (56). A spring (52) is located between the limiting part (56) and the mounting groove (55).

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