Plasma resectoscope

Abstract

The invention discloses a plasma resectoscope which comprises a sheath assembly, an operator, an electric resection ring assembly and an electronic endoscope. A sheath assembly is arranged at the front end of the operator and comprises an outer sheath and an inner sheath, the outer sheath is arranged on the outer side of the inner sheath in a sleeving mode, the electronic endoscope comprises an endoscope tube and an operating handle, the endoscope tube is arranged in the inner sheath, the electric resection ring assembly comprises an electrode tip, a connecting rod and an electrode rod, and the tail end of the rear side of the electrode rod is connected with a sliding block. The sliding block is installed on the manipulator in a sliding mode, the sliding block is connected with a finger hook, and a distance sensor for sensing the position of the sliding block is arranged on the manipulator. The electron mirror and the plasma electric resection ring are matched for use, an electronic camera system is mature, the cost is low, and the process is simple; the field angle of the electronic endoscope is large, and the visual range is wide; the image sensor is small in size, and the overall outer diameter can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, in particular to the technical field of plasma resectoscopes. Background Art

[0002] The plasma resectoscope uses the energy generated by bipolar radio frequency to convert the electrolyte between the radio frequency blade and the tissue into a thin layer of plasma; these high-speed moving ions have enough energy to break the organic molecular bonds of the target tissue, causing large molecules to disintegrate into small molecules, producing a vaporization effect, thereby achieving tissue cutting; at the same time, during the cutting process, it can also quickly close the deep arterioles, venules and capillaries, thereby playing an effective hemostatic role.

[0003] In the prior art, an electrosurgical resectoscope is usually imaged by an optical endoscope. The optical endoscope has high cost, difficult process, limited field of view, and the thickness of the tube is inversely proportional to the image quality. Various technical indicators have reached a bottleneck. Patent document with publication number CN221154288U discloses an electrosurgical resectoscope that uses an optical endoscope for observation. Patent document with publication number CN215914871U discloses an electric rotary plasma electrosurgical resectoscope that also uses an optical endoscope for observation.

[0004] The electronic camera system is mature, low-cost and simple in process. However, electronic endoscopes have not yet been applied to resectoscopes. This is because optical endoscopes are connected to external cameras to achieve image acquisition and display, while the camera of electronic endoscopes is located at the front end of the endoscope body. Therefore, there are the following difficulties in applying electronic endoscopes to resectoscopes: 1. The optical frequency interference generated by the electric cutting ring has a greater impact on the close-range camera, and the captured image is more likely to have adverse effects such as stripes or noise, resulting in unclear images; 2. The heat generated by the electric cutting ring during operation has a great impact on the camera and is easy to damage the camera; 3. The characteristic of an optical resectoscope is that the optical mirror rotates, while the camera connected to the back does not move to ensure the image orientation. However, since the camera of the electronic mirror is placed in the front, the camera also rotates, causing the captured image to rotate as well. The image rotation will cause the doctor's perception of the operation direction to deviate. Summary of the invention

[0005] The purpose of the present invention is to solve the problems in the prior art and to provide a plasma resectoscope that can solve the above problems.

[0006] To achieve the above-mentioned purpose, the present invention proposes a plasma resectoscope, comprising a sheath assembly, an operator, an electric resection ring assembly and an electronic endoscope; a sheath assembly is provided at the front end of the operator, the sheath assembly comprises an outer sheath and an inner sheath, the outer sheath is arranged on the outside of the inner sheath, the electronic endoscope comprises a mirror tube and an operating handle, the mirror tube is arranged in the inner sheath, the electric resection ring assembly comprises an electrode head, a connecting rod and an electrode rod, the electrode head is arranged on the front side of the mirror tube, the two sides of the electrode head are connected to connecting rods, the connecting rods are connected to electrode rods, the electrode rods are arranged on both sides of the mirror tube, the rear end of the electrode rod is connected to a slider, the slider is slidably installed on the operator, the slider is connected to a finger hook, and the operator is provided with a distance sensor for sensing the position of the slider.

[0007] The distance sensor ensures that the electric cutting ring can only work when it is at a specific distance from the electronic lens end. When the slider of the electric cutting ring is within a certain range of the sensor, the electric cutting ring will not work even if the switch of the electric cutting ring is turned on. This solves the problem of damage to the electronic lens end caused by high temperature of the electric cutting ring due to misoperation caused by the distance being too close.

[0008] Preferably, conduits are provided on both sides of the mirror tube, the electrode rod is slidably sleeved in the conduits, a lens tube is provided at the front head end of the mirror tube, an image sensor is provided in the lens tube, a protective glass is provided on the outer surface of the lens tube, and a cut-off film is provided on the side of the protective glass close to the image sensor.

[0009] Protective glass reduces physical damage to the image sensor and increases its service life.

[0010] The protective glass is sprayed with a film layer that cuts off specific wavelengths to eliminate or reduce the interference of specific light waves on the module.

[0011] Preferably, a tip end is provided in the lens tube, the image sensor is installed in the tip end, the front head diameter of the image sensor is larger than the rear tail diameter of the image sensor, the diameter of the lens tube is larger than the diameter of the mirror tube and the two are smoothly transitioned through an inclined surface.

[0012] Taking advantage of the characteristics of the image sensor, which has a large head end and a thin wire at the rear end, a mirror tube with the same structure is made to rationally layout the water inlet and outlet areas, which can effectively increase the total water inlet and outlet areas.

[0013] Preferably, a mounting slot for the protective glass is provided on the surface of the tip, a limiting slot for mounting the lens tube is provided in the middle of the mounting slot, a first bonding surface and a second bonding surface are provided in the mounting slot, the left and right sides of the mounting slot are arc-edge structures, the first bonding surface is bonded to the outer periphery of the bottom surface of the protective glass, the second bonding surface is bonded to the side surface of the protective glass, and a light guide for lighting is provided above the tip.

[0014] The light guide is located above the image sensor, and the lower end of the image sensor is a flat end.

[0015] The first adhesive joint surface and the second adhesive joint surface improve the adhesive strength between the protective glass and the tip.

[0016] Preferably, the lens tube is bent downward to form a viewing angle θ with the central axis of the inner sheath, and the image sensor installation direction is consistent with the bending direction of the lens tube.

[0017] Preferably, the viewing angle θ is 0 to 30°.

[0018] Preferably, the gap between the inner sheath and the outer sheath is a water outlet channel; the gap between the inner sheath and the mirror tube is a water inlet channel.

[0019] Preferably, the distance sensor includes a photoelectric sensor, a spring, a fixed rod and a telescopic rod, the fixed rod is fixed on the operator, a mounting groove is provided in the fixed rod, a photoelectric sensor is provided at the end of the mounting groove away from the slider, a telescopic rod is slidably installed at the end of the mounting groove close to the slider, the end of the telescopic rod protrudes from the fixed rod, a limiting part is provided on the telescopic rod, and a spring is provided between the limiting part and the mounting groove; when the photoelectric sensor has no induction, the electric cutting ring assembly works normally; when the photoelectric sensor is triggered, the electric cutting ring assembly cannot work.

[0020] Preferably, an operating button is provided on the operating handle, and a signal adapter board containing an angle sensor is provided in the operating handle.

[0021] Preferably, the operating handle is arranged at the rear of the operator, and the rear of the operating handle is connected to a plug assembly through a guide tube, and the plug assembly includes a power plug and a light source plug.

[0022] The beneficial effects of the present invention are as follows: the present invention adopts an electronic mirror and a plasma electric cutting ring for use in combination, the electronic camera system is mature, the cost is low, and the process is simple; the electronic endoscope has a large field of view and a wide visual range; the image sensor is small in size, which can reduce the overall outer diameter and reduce pain, or under the same outer diameter, it can increase the water inlet and outlet area and increase the clarity of the field of view; the image sensor is image-oriented, has a strong sense of direction, and is easy to operate; a protective glass containing a cutoff film is provided to eliminate or reduce the influence of light pollution generated when the plasma electric cutting ring is used on the image sensor; the present invention is provided with a distance sensor to ensure that the electric cutting ring can only play a role when it is at a specific distance from the electronic lens end, and solves the problem that the high temperature of the electric cutting ring damages the electronic lens end when the distance is too close and misoperation occurs; an angle sensor is provided to correct the image during the rotation operation, thereby realizing the image orientation function; the present invention utilizes the characteristics of the image sensor with a large head end and a thin wire at the rear end to manufacture a mirror tube with the same structure and increase the water inlet area. On the one hand, blood caused by surgery can be replaced in time to keep the field of view clear, and on the other hand, the cut tissue can be discharged in time to avoid blocking the channel.

[0023] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 is a schematic diagram of an electric cutting ring assembly of the present invention; Figure 3 is a schematic diagram of an operator of the present invention; Figure 4 is a schematic diagram of the installation of the image sensor of the present invention; Figure 5 is a schematic diagram of the tip of the present invention; Figure 6 It is a schematic diagram of the lens tube structure of the present invention; Figure 7 It is a schematic diagram of the water inlet and outlet channels of the present invention; Figure 8 is a schematic diagram of a distance sensor of the present invention; Fig. 9 It is a schematic diagram of the structure of the operating handle of the present invention.

[0025] In the figure: 1. sheath assembly; 2. operator; 3. electric cutting ring assembly; 4. electronic endoscope; 5. distance sensor; 6. tip; 7. operating handle; 8. power plug; 9. light source plug; 11. outer sheath; 12. inner sheath; 13. water outlet channel; 14. water inlet channel; 31. electrode head; 32. connecting rod; 33. electrode rod; 34. slider; 35. finger hook; 41. mirror tube; 42. catheter; 43. lens tube; 44. image sensor; 45. protective glass; 46. inclined plane; 51. photoelectric sensor; 52. spring; 53. fixing rod; 54. telescopic rod; 55. mounting groove; 56. limiting part; 61. mounting slot; 62. limiting groove; 63. first adhesive joint surface; 64. second adhesive joint surface; 65. light guide; 71. signal adapter board. DETAILED DESCRIPTION

[0026] Example 1 See also Figures 1 to 7 A plasma resectoscope comprises a sheath assembly 1, an operator 2, an electric cutting ring assembly 3 and an electronic endoscope 4; the front end of the operator 2 is provided with a sheath assembly 1, the sheath assembly 1 comprises an outer sheath 11 and an inner sheath 12, the outer sheath 11 is sleeved on the outside of the inner sheath 12, the electronic endoscope 4 comprises a mirror tube 41 and an operating handle 7, the mirror tube 41 is arranged in the inner sheath 12, the electric cutting ring assembly 3 comprises an electrode head 31, a connecting rod 32 and an electrode rod 33, the electrode head 31 is arranged on the front side of the mirror tube 41, the two sides of the electrode head 31 are connected with connecting rods 32, the connecting rods 32 are connected with electrode rods 33, the electrode rods 33 are arranged on both sides of the mirror tube 41, the rear end of the electrode rod 33 is connected with a slider 34, the slider 34 is slidably installed on the operator 2, the slider 34 is connected with a finger hook 35, and the operator 2 is provided with a distance sensor 5 for sensing the position of the slider 34.

[0027] A guide tube 42 is provided on both sides of the mirror tube 41, and the electrode rod 33 is slidably sleeved in the guide tube 42. A lens tube 43 is provided at the front head end of the mirror tube 41, and an image sensor 44 is provided in the lens tube 43. A protective glass 45 is provided on the outer surface of the lens tube 43, and a cut-off film is provided on the side of the protective glass 45 close to the image sensor 44.

[0028] The lens tube 43 is provided with a tip head 6, and the image sensor 44 is installed in the tip head 6. The diameter of the front head of the image sensor 44 is larger than the diameter of the rear tail of the image sensor 44. The diameter of the lens tube 43 is larger than the diameter of the mirror tube 41, and the two are smoothly transitioned through a slope 46.

[0029] The surface of the tip head 6 is provided with a mounting slot 61 for the protective glass 45, and a limiting slot 62 for mounting the lens tube 43 is provided in the middle of the mounting slot 61. A first bonding surface 63 and a second bonding surface 64 are provided in the mounting slot 61. The left and right sides of the mounting slot 61 are arc-edge structures. The first bonding surface 63 is bonded to the outer periphery of the bottom surface of the protective glass 45, and the second bonding surface 64 is bonded to the side surface of the protective glass 45. A light guide 65 for lighting is provided above the tip head 6.

[0030] The lens tube 43 is bent downward to form a viewing angle θ with the central axis of the inner sheath 12 . The installation direction of the image sensor 44 is consistent with the bending direction of the lens tube 43 .

[0031] The viewing angle θ is 0-30° to adjust the observation range.

[0032] The image sensor field of view angle ω is available in 90° and 120°.

[0033] The gap between the inner sheath 12 and the outer sheath 11 is a water outlet channel 13 ; the gap between the inner sheath 12 and the mirror tube 41 is a water inlet channel 14 .

[0034] The operating handle 7 is arranged at the rear of the operator 2 , and a plug assembly is connected to the rear of the operating handle 7 through a guide tube. The plug assembly includes a power plug 8 and a light source plug 9 .

[0035] Example 2 See also Figure 8 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 operator 2. A mounting groove 55 is provided in the fixed rod 53. A photoelectric sensor 51 is provided at one end of the mounting groove 55 away from the slider 34. A telescopic rod 54 is slidably installed at one end of the mounting groove 55 close to the slider 34. The end of the telescopic rod 54 protrudes from the fixed rod 53. A limiting portion 56 is provided on the telescopic rod 54. A spring 52 is provided between the limiting portion 56 and the mounting groove 55. When the photoelectric sensor 51 has no induction, the electric cutting ring assembly 3 works normally; when the photoelectric sensor 51 is triggered, the electric cutting ring assembly 3 cannot work.

[0036] When the operator is not working or has not reached the specified position, the telescopic rod is squeezed by the slider, the spring is compressed, and the tail of the telescopic rod is sensed by the photoelectric sensor. Even if the working switch controlling the electric cutting ring assembly is turned on, the electric cutting ring assembly will not work. Only when the photoelectric sensor has no induction can the plasma electric cutting ring work normally.

[0037] The rest is the same as in Example 1.

[0038] Example 3 See also Fig. 9The operating handle 7 is provided with an operating button, and the operating handle 7 is provided with a signal adapter board 71 containing an angle sensor.

[0039] The rest is the same as in Example 1.

[0040] The operation buttons include a photo button, a video button, and a flesh-color removal button, which can realize the functions of photo taking, video recording and flesh-color removal.

[0041] During use, the rotation angle of the electronic endoscope is sensed by the angle sensor, and the captured image is processed using the corresponding image rotation algorithm based on the angle data provided by the angle sensor. Common algorithms, such as the rotation algorithm based on matrix transformation, rotate the image by calculating the new position of each pixel in the image after rotation, thereby correcting the image angle deviation caused by the rotation of the camera and keeping the picture in the predetermined direction.

[0042] In the image correction system, there is a virtual interface that keeps in sync with the real interface; a cross interface or a straight interface is set on the virtual interface, and this special interface is a key element for detecting and correcting image deviation; at the same time, there is also a fixed cross reference interface, which serves as a reference standard; the system uses an angle sensor to sense the angle difference between the cross or straight interface on the virtual interface and the reference cross interface; when the image is offset, the virtual interface will change accordingly, resulting in an angle deviation between the cross or straight interface on the virtual interface and the reference cross interface; the angle sensor can accurately measure this angle change and convert it into processable information such as electrical signals or digital signals; the system calculates the direction and degree of image offset based on the angle information fed back by the sensor, and then performs corresponding correction operations on the image through specific algorithms and control mechanisms, so that the images in both the real interface and the virtual interface can be restored to the correct position and angle, thereby achieving the purpose of image correction.

[0043] The cross or straight line of the virtual interface generates an angle with the static interface, which generates a relationship with the angle of the angle sensor. The system collects 360° relationship values. When the actual angle of the sensor is input into the system, the system outputs the corresponding relationship value to correct the angle.

[0044] Specifically, the angle sensor (such as MPU6050 gyroscope) is connected to Arduino, and the data of the angle sensor is read by Arduino to calculate the rotation angle; the angle data read by Arduino is transmitted to the computer through serial communication; Python and OpenCV libraries are used to control the camera to collect images, and then the image is rotated according to the received angle data to achieve directional display of the image on the computer display.

[0045] The present invention uses an electronic mirror for plasma electric cutting, thus filling in the blank in this field.

[0046] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention belongs to the protection scope of the present invention.

Claims

1. A plasma resectoscope, characterized in that: The electronic endoscope (4) comprises a sheath assembly (1), an operator (2), an electric cutting ring assembly (3) and an electronic endoscope (4); the front end of the operator (2) is provided with a sheath assembly (1), the sheath assembly (1) comprises an outer sheath (11) and an inner sheath (12), the outer sheath (11) is sleeved on the outer side of the inner sheath (12), the electronic endoscope (4) comprises a mirror tube (41) and an operating handle (7), the mirror tube (41) is arranged in the inner sheath (12), the electric cutting ring assembly (3) comprises an electrode head (31), a connecting rod (32) and an electrode rod (33), The electrode head (31) is arranged at the front side of the mirror tube (41), the two sides of the electrode head (31) are connected to connecting rods (32), the connecting rods (32) are connected to electrode rods (33), the electrode rods (33) are arranged at the two sides of the mirror tube (41), the rear ends of the electrode rods (33) are connected to sliders (34), the sliders (34) are slidably mounted on the operator (2), the sliders (34) are connected to finger hooks (35), and the operator (2) is provided with a distance sensor (5) for sensing the position of the slider (34).

2. The plasma resectoscope according to claim 1, characterized in that: Guide tubes (42) are provided on both sides of the mirror tube (41), the electrode rods (33) are slidably sleeved in the guide tubes (42), a lens tube (43) is provided at the front end of the mirror tube (41), an image sensor (44) is provided in the lens tube (43), a protective glass (45) is provided on the outer surface of the lens tube (43), and a cut-off film is provided on a side of the protective glass (45) close to the image sensor (44).

3. The plasma resectoscope according to claim 2, characterized in that: A tip end (6) is provided in the lens tube (43), the image sensor (44) is mounted in the tip end (6), the diameter of the front head of the image sensor (44) is larger than the diameter of the rear tail of the image sensor (44), the diameter of the lens tube (43) is larger than the diameter of the mirror tube (41), and a smooth transition is formed between the two via an inclined surface (46).

4. The plasma resectoscope according to claim 3, characterized in that: A mounting slot (61) for the protective glass (45) is provided on the surface of the tip (6), a limiting slot (62) for mounting the lens tube (43) is provided in the middle of the mounting slot (61), a first adhesive surface (63) and a second adhesive surface (64) are provided in the mounting slot (61), the left and right sides of the mounting slot (61) are arc-edge structures, the first adhesive surface (63) is adhesively bonded to the outer periphery of the bottom surface of the protective glass (45), and the second adhesive surface (64) is adhesively bonded to the side surface of the protective glass (45), and a light guide (65) for lighting is provided above the tip (6).

5. The plasma resectoscope according to claim 2, characterized in that: The lens tube (43) is bent downwards to form a viewing angle θ with the central axis of the inner sheath (12); the installation direction of the image sensor (44) is consistent with the bending direction of the lens tube (43).

6. The plasma resectoscope according to claim 5, characterized in that: The viewing angle θ is 0 to 30°.

7. The plasma resectoscope according to claim 3, characterized in that: The gap between the inner sheath (12) and the outer sheath (11) is a water outlet channel (13); and the gap between the inner sheath (12) and the mirror tube (41) is a water inlet channel (14).

8. The plasma resectoscope according to claim 1, characterized in that: The distance sensor (5) comprises a photoelectric sensor (51), a spring (52), a fixed rod (53) and a telescopic rod (54); the fixed rod (53) is fixed on the operator (2); a mounting groove (55) is provided in the fixed rod (53); a photoelectric sensor (51) is provided at one end of the mounting groove (55) away from the slider (34); a telescopic rod (54) is slidably mounted at one end of the mounting groove (55) close to the slider (34); a distal end of the telescopic rod (54) protrudes from the fixed rod (53); a limiting portion (56) is provided on the telescopic rod (54); a spring (52) is provided between the limiting portion (56) and the mounting groove (55); when the photoelectric sensor (51) is not sensing, the electric cutting ring assembly (3) works normally; when the photoelectric sensor (51) is triggered, the electric cutting ring assembly (3) cannot work.

9. The plasma resectoscope according to claim 1, characterized in that: The operating handle (7) is provided with an operating button, and a signal adapter plate (71) containing an angle sensor is provided in the operating handle (7). The operating handle (7) is arranged at the rear of the operator (2), and a plug assembly is connected to the rear of the operating handle (7) via a guide tube, wherein the plug assembly comprises a power plug (8) and a light source plug (9).

10. The plasma resectoscope according to claim 9, characterized in that: The angle sensor is connected to Arduino, and the Arduino is used to read the data of the angle sensor and calculate the rotation angle. The angle data read by the Arduino is transmitted to the computer. Python and OpenCV libraries are used to control the camera to collect images, and then the image is rotated according to the received angle data to achieve directional display of the image on the computer display.

Images