Hard ureteroscope

Abstract

The hard ureteroscope comprises a ureteroscope body, an outer sheath tube and an inner tube are arranged at the front end of the ureteroscope body, the inner tube is arranged in the outer sheath tube in a sleeved mode and divides the inner portion of the outer sheath tube into a first outer channel and a second outer channel, and an instrument channel opening communicated with the inner tube is formed in the rear end of the ureteroscope body and used for guiding an instrument tube into a ureter through the inner tube to crush stones. Wherein a flexible circuit board which is arranged in a bent mode is arranged in the first outer channel, a sealed containing cavity is formed between the front section of the flexible circuit board and the front end of the first outer channel and used for containing a camera shooting assembly arranged on the front section of the flexible circuit board in a sealed mode, and the rear section of the flexible circuit board penetrates through the mirror body through the rear end of the first outer channel and is used for being electrically connected with a host. The second outer channel is communicated with a perfusion connector arranged on the endoscope body, and the inner tube is communicated with a suction connector arranged on the endoscope body. The flexible circuit board is used for forming the ureteroscope small in size, perfusion operation and suction operation can be carried out at the same time, and the use time of an operation is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, and more specifically to a ureteroscope. Background Art

[0002] The rigid ureteroscope is used to treat ureteral stones. It can directly enter the ureter through the urethra to observe the lesions of the ureter. The instrument is introduced using an instrument tube, and lithotripsy and stone removal can be performed under continuous perfusion.

[0003] The ureteroscope used in the treatment of pediatric ureteral stones needs to meet the requirement of a smaller size to ensure the smooth insertion of the ureteroscope and the successful completion of the operation. At present, in order to meet the small size requirement, the existing ureteroscope only has one instrument channel, which is responsible for both irrigation and suction. That is to say, during ureteroscope lithotripsy, physiological saline is continuously injected into the renal pelvis through the instrument channel to keep the cavity expanded, and the stones are sucked out and discharged through the same instrument channel. Therefore, the existing ureteroscope cannot perform irrigation and suction operations at the same time, resulting in a longer operation time.

[0004] In summary, how to provide a small-sized rigid ureteroscope that reduces surgical time is an urgent problem to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the purpose of the utility model is to provide a ureteroscope, which uses a flexible circuit board to form a small-sized ureteroscope and can perform irrigation and suction operations simultaneously, thereby shortening the operation time.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A ureteroscope, comprising a scope body, wherein the front end of the scope body is provided with an outer sheath tube and an inner tube, the inner tube is sleeved in the outer sheath tube and its interior is divided into a first outer channel and a second outer channel, and the rear end of the scope body is provided with an instrument channel opening communicated with the inner tube, for introducing an instrument tube into the ureter through the inner tube to crush stones;

[0008] A bent flexible circuit board is provided in the first outer channel, and a sealed cavity is formed between the front section of the flexible circuit board and the front end of the first outer channel, which is used to seal and accommodate the camera assembly placed on the front section of the flexible circuit board, and the rear section of the flexible circuit board passes through the mirror body through the rear end of the first outer channel, which is used to be electrically connected to the host;

[0009] The second outer channel is communicated with the perfusion interface provided on the mirror body, and the inner tube is communicated with the suction interface provided on the mirror body, so that physiological saline is poured into the ureter through the second outer channel to flush the lithotripsy, and the lithotripsy is simultaneously suctioned out of the body through the inner tube.

[0010] Preferably, the front ends of the inner tube and the outer sheath tube adjacent to the second outer channel are cut together to form an arc-shaped groove.

[0011] Preferably, the outer sheath tube comprises an elliptical tube segment and a circular tube segment which are connected together, the circular tube segment is connected between the elliptical tube segment and the mirror body, and the cross-sectional area of ​​the elliptical tube segment along its short axis direction is smaller than the cross-sectional area of ​​the circular tube segment, and the cross-sectional area of ​​the elliptical tube segment along its long axis direction is larger than the cross-sectional area of ​​the circular tube segment.

[0012] Preferably, the unprocessed outer sheath tube is a round tube, the front end of the round tube is pressed toward each other to form the elliptical tube segment, and the rear end of the round tube forms the round tube segment, so that the outer sheath tube is pressed and formed as a whole.

[0013] Preferably, the outer surface of the circular pipe segment is wrapped with a strengthening layer made by shot peening.

[0014] Preferably, the two side walls of the inner tube are sealed and connected one by one with the two side walls of the elliptical tube segment along its short axis direction, the top wall of the inner tube is a flat plate structure, and together with the inner walls of the elliptical tube segment and the circular tube segment form the first outer channel, and the bottom wall of the inner tube is an arched structure protruding outward, and together with the inner walls of the elliptical tube segment and the circular tube segment form the second outer channel.

[0015] Preferably, the front section of the flexible circuit board is arranged vertically and the rear section is arranged horizontally to form the flexible circuit board with an L-shaped structure, and the flexible circuit board is glue-filled and sealed in the first outer channel.

[0016] Preferably, the glass sheet is sealed at the front end of the first outer channel, and is used to enclose the sealed cavity with the inner wall of the outer sheath tube, the outer wall of the inner tube, and the front section of the flexible circuit board;

[0017] The camera assembly comprises a CMOS lens and a plurality of LED lights. The CMOS lens is arranged at the front section of the flexible circuit board, and the plurality of LED lights are evenly distributed around the CMOS lens and arranged at the front section of the flexible circuit board.

[0018] Preferably, the mirror body is provided with a video connecting tube connected to the first external channel, and the end of the video connecting tube away from the mirror body is provided with a video plug for inserting into the plug socket of the host, and the rear section of the flexible circuit board is fixed to the video plug via the first external channel, the mirror body and the video connecting tube in sequence.

[0019] Preferably, the tube section of the video connecting tube adjacent to the mirror body is bent at a certain angle toward the rear end of the mirror body to form a first bent section, and the tube section of the video connecting tube adjacent to the video plug is bent at a certain angle toward the rear end of the mirror body to form a second bent section.

[0020] Compared with the above background technology, the present application divides the interior of the outer sheath into a first outer channel and a second outer channel through an inner tube. Among them, a camera assembly for collecting images of ureteral lesions and a flexible circuit board for transmitting images to a host are placed in the first outer channel. The flexible circuit board is arranged in a bent shape, which can maximize the use of space, and can also reduce the internal space of the outer sheath occupied by the first outer channel, thereby reducing the size of the outer sheath, and also reducing the size of the ureteroscope, so that the ureteroscope can be smoothly inserted into the ureter; the second outer channel is connected to the perfusion interface to serve as a water perfusion channel, and the inner tube is connected to the suction interface to serve as a water return channel. In ureteroscope lithotripsy, after the ureteral calculi are crushed by the instrument tube, saline is poured into the ureter through the second outer channel to wash the gravel, and at the same time, the saline carrying the gravel is sucked out of the body through the inner tube, that is, the perfusion and suction operations are performed simultaneously, thereby reducing the duration of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0022] Figure 1 A structural schematic diagram of a ureteroscope provided by the utility model;

[0023] Figure 2 A front view of a ureteroscope provided by the utility model;

[0024] Figure 3 for Figure 2 Section view at AA;

[0025] Figure 4 A schematic diagram of the installation of the camera assembly and the flexible printed circuit board provided by the utility model;

[0026] Figure 5 This is a schematic diagram of the installation of the perfusion interface and the suction interface provided by the utility model;

[0027] Figure 6 The utility model is provided with the video connection tube and the video plug installation schematic diagram.

[0028] Reference numerals:

[0029] 1-scope body; 2-outer sheath; 3-inner tube; 4-first outer channel; 5-second outer channel; 6-instrument channel port; 7-flexible circuit board; 8-perfusion interface; 9-suction interface; 10-video connecting tube; 11-video plug; 12-CMOS lens; 13-LED light; 14-glass sheet; 15-arc groove; 21-elliptical tube segment; 22-circular tube segment. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] The core of the utility model is to provide a ureteroscope, which uses a flexible circuit board to form a small-sized ureteroscope and can perform irrigation and suction operations at the same time, thereby shortening the operation time.

[0032] It should be noted that, in the present embodiment, the directions or positional relationships indicated by “upper”, “lower”, “front”, “back”, etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present application.

[0033] Please refer to Figures 1 to 3 The present application provides a ureteroscope, including a scope body 1, the front end of the scope body 1 is provided with an outer sheath 2 and an inner tube 3, the inner tube 3 is sleeved in the outer sheath 2 and its interior is divided into a first outer channel 4 and a second outer channel 5, and the rear end of the scope body 1 is provided with an instrument channel opening 6 connected with the inner tube 3, which is used to introduce an instrument tube into the ureter through the inner tube 3 to crush stones.

[0034] Among them, a bent flexible circuit board 7 is provided in the first outer channel 4, and a sealed cavity is formed between the front section of the flexible circuit board 7 and the front end of the first outer channel 4, which is used to seal and accommodate the camera component placed on the front section of the flexible circuit board 7. The rear section of the flexible circuit board 7 passes through the mirror body 1 through the rear end of the first outer channel 4 for electrical connection with the host.

[0035] The second outer channel 5 is connected to the perfusion interface 8 provided on the mirror body 1, and the inner tube 3 is connected to the suction interface 9 provided on the mirror body 1, so that physiological saline can be poured into the ureter through the second outer channel 5 to flush the lithotripsy, and the lithotripsy can be sucked out of the body through the inner tube 3 at the same time.

[0036] Specifically, the front end of the scope 1 is connected with an insertion part, which is composed of an outer sheath tube 2 and an inner tube 3 sleeved inside the outer sheath tube 2. The rear end of the scope 1 is provided with an instrument channel opening 6. A channel is provided in the scope 1 and between the inner tube 3 and the instrument channel opening 6 to connect the inner tube 3 and the instrument channel opening 6, so that the instrument tube is inserted into the ureter through the inner tube 3 to crush the stone. Preferably, the inner tube 3 is coaxially arranged with the outer sheath tube 2, and the lengths of the two are consistent, so as to reasonably utilize the internal space of the outer sheath tube 2 and divide it into two non-interconnected first outer channels 4 and second outer channels 5, wherein a flexible circuit board 7 is placed in the first outer channel 4, and a sealed cavity is arranged between the front end of the flexible circuit board 7 and the first outer channel 4, and a camera assembly for collecting images of ureteral lesions is sealed in the sealed cavity to prevent the isoelectric components in the camera assembly from being damaged by water, and the camera assembly is arranged at the front end of the flexible circuit board 7 to transmit images to the host using the flexible circuit board 7, so that the medical staff can use the instrument tube to crush the stone after confirming the location of the lesion. In addition, the front and rear ends of the second outer channel 5 are both set to be openings, a perfusion interface 8 is provided on one side of the mirror body 1, and a channel is provided inside the mirror body 1 and between the rear end of the second outer channel 5 and the perfusion interface 8 to connect the second outer channel 5 and the perfusion interface 8, and the perfusion interface 8 is connected to a physiological saline supply device, which is composed of a physiological saline tank and a pump. The pump is arranged between the physiological saline tank and the perfusion interface 8 through a pipeline for pumping physiological saline. It should be noted that the physiological saline supply device can also be composed of other components, as long as the physiological saline is injected into the ureter through the second outer channel 5. The front and rear ends of the inner tube 3 are both set as openings, and a suction interface 9 is provided on the other side of the mirror body 1. A channel is provided in the mirror body 1 and between the rear end of the inner tube 3 and the suction interface 9 to connect the inner tube 3 and the suction interface 9, and the suction interface 9 is connected to a waste liquid collection device, which is composed of a pump and a waste liquid collection box. The pump is arranged between the waste liquid collection box and the suction interface 9 through a pipeline, and is used to suck the physiological saline carrying gravel. It should be noted that the waste liquid collection device can also be composed of other components, as long as the gravel can be discharged from the ureter through the inner tube 3, that is, discharged from the body.

[0037] In the ureteroscope with the above-mentioned structural arrangement, the flexible circuit board 7 is arranged in a bent shape, which can maximize the use of space, that is, the internal space occupied by the outer sheath 2 occupied by the first outer channel 4 can be reduced, thereby reducing the size of the outer sheath 2, and thus reducing the size of the ureteroscope, thereby allowing the ureteroscope to be smoothly inserted into the ureter; the second outer channel 5 is connected to the perfusion interface 8 to serve as a water perfusion channel, and the inner tube 3 is connected to the suction interface 9 to serve as a water return channel. In ureteroscope lithotripsy, after the ureteral calculi are crushed by the instrument tube, physiological saline is poured into the ureter through the second outer channel 5 to flush the gravel, and at the same time, the physiological saline carrying the gravel is sucked out of the body through the inner tube 3, that is, perfusion and suction operations are performed simultaneously, thereby reducing the duration of the operation.

[0038] Preferably, Figure 5 As shown, both the perfusion interface 8 and the suction interface 9 adopt Luer interfaces to facilitate the connection of the ureteroscope with other medical devices such as a saline supply device and a waste liquid collection device, that is, to improve the simplicity and compatibility of the connection.

[0039] To further optimize the advantages of the ureteroscope in successfully inserting the ureter. Based on the above embodiments, please refer to Figure 3 The inner tube 3 adjacent to the second outer channel 5 and the front end of the outer sheath 2 are cut together to form an arc groove 15 to reduce the resistance of the ureteral wall to the outer sheath 2, thereby improving the convenience and efficiency of ureteroscope insertion and further shortening the operation time.

[0040] It should be noted that the smaller the size of the ureteroscope is, the higher the bending resistance requirement of the outer sheath 2 is, so as to ensure that the outer sheath 2 is not easy to break, thereby ensuring that the ureteroscope has a longer service life.

[0041] In order to optimize the service life of the ureteroscope while meeting the small size requirement of the ureteroscope. Figure 2 The outer sheath 2 includes an elliptical tube segment 21 and a circular tube segment 22 which are connected as one body. The circular tube segment 22 is connected between the elliptical tube segment 21 and the mirror body 1. The cross-sectional area of ​​the elliptical tube segment 21 along its short axis direction is smaller than the cross-sectional area of ​​the circular tube segment 22, and the cross-sectional area of ​​the elliptical tube segment 21 along its long axis direction is larger than the cross-sectional area of ​​the circular tube segment 22.

[0042] It can be understood that, on the one hand, the internal space of the elliptical tube segment 21 along its length direction is larger than the internal space of the elliptical tube segment 21 along its short axis direction. Compared with the circular tube segment 22, the elliptical tube segment 21 has a larger space along its long axis direction, so that the first outer channel 4, the inner tube 3 and the second outer channel 5 can be arranged in sequence along the long axis direction of the elliptical tube segment 21, so as to facilitate the installation of the camera assembly and the flexible circuit board 7 in the first outer channel 4 without reducing the setting space of the inner tube 3 and the second outer channel 5. On the other hand, it is first explained that the elliptical tube segment 21 is the front end of the outer sheath tube 2, which is mainly used to be introduced into a very thin ureter, and the circular tube segment 22 is the rear end of the outer sheath tube 2, which is mainly used to be placed in a large volume. The elliptical tube segment 21 is located in the bladder wall of the ureter. Therefore, compared with the circular tube segment 22, the elliptical tube segment 21 is smaller in volume, which can make it easier for the ureteroscope to be smoothly inserted into the ureter. On this basis, the cross-sectional area of ​​the elliptical tube segment 21 in the direction of its short axis is smaller than that of the circular tube segment 22, but the cross-sectional area of ​​the elliptical tube segment 21 in the direction of its long axis is larger than that of the circular tube segment 22, so it can withstand a larger load. The bending resistance of the elliptical tube segment 21 is greater than that of the circular tube segment 22. The elliptical tube segment 21 is not easy to break. Even if the elliptical tube segment 21 is small in size, it has a longer service life. Therefore, the outer sheath tube 2 with the above-mentioned structure is easier to be smoothly inserted into the ureter, and is not easy to break, and has a longer service life.

[0043] To facilitate the processing of the outer sheath tube 2, based on the above embodiment, the unprocessed outer sheath tube 2 is a round tube, the front end of the round tube is pressed toward each other to form an elliptical tube segment 21, and the rear end of the round tube forms a round tube segment 22, so that the outer sheath tube 2 is pressed and formed as one piece, which is beneficial to reduce the processing cost and improve the structural strength of the outer sheath tube 2.

[0044] To further optimize the structural strength of the outer sheath 2, based on the above embodiment, the outer surface of the circular tube segment 22 is wrapped with a strengthening layer made by shot peening process to further improve the structural strength of the outer sheath 2 and further increase the service life of the ureteroscope.

[0045] In order to improve the suction and drainage efficiency and further reduce the use time of ureteroscopy, based on the above embodiment, please refer to Figure 2 The two side walls of the inner tube 3 are sealed and connected one by one with the two side walls of the elliptical tube segment 21 along its short axis direction. The top wall of the inner tube 3 is a flat plate structure, and together with the inner walls of the elliptical tube segment 21 and the circular tube segment 22, forms a first outer channel 4. The bottom wall of the inner tube 3 is an arched structure convex outward, and together with the inner walls of the elliptical tube segment 21 and the circular tube segment 22, forms a second outer channel 5.

[0046] Specifically, the inner tube 3 is composed of a top wall, a bottom wall protruding outward, and two side walls respectively connected to the two side ends of the top wall and the bottom wall. The two outer side walls of the inner tube 3 are sealed one by one with the two inner side walls of the elliptical tube section 21 to isolate the first outer channel 4 and the second outer channel 5 to prevent the flow of the two from causing damage to the camera assembly and the flexible circuit board 7. The top wall is a flat structure, which is convenient for arranging the camera assembly and the flexible circuit board 7, and the bottom wall protrudes away from the top wall to form an arched structure, which can increase the distance between the top wall and the bottom wall of the inner tube 3, that is, increase the cross-sectional area of ​​the inner tube 3 to reduce the resistance to the physiological saline carrying the gravel, which is beneficial to improve the discharge efficiency of the gravel.

[0047] In order to optimize the structural stability of the flexible printed circuit board 7, based on the above embodiment, please refer to Figure 3 The front section of the flexible circuit board 7 is arranged vertically and the rear section is arranged horizontally to form an L-shaped flexible circuit board 7, and the flexible circuit board 7 is sealed and glue-filled in the first outer channel 4.

[0048] Specifically, the front and rear ends of the flexible circuit board 7 form an angle of 90°, that is, the flexible circuit board 7 is arranged in an L-shaped structure and sealed in the first outer channel 4 by channel glue filling to enhance the structural stability of the flexible circuit board 7, which is beneficial to improving the stability of the camera assembly.

[0049] To optimize the efficiency and quality of ureteroscopy, please refer to Figure 3 and Figure 4 A glass sheet 14 is sealed at the front end of the first outer channel 4, and is used to form a sealed cavity with the inner wall of the outer sheath 2, the outer wall of the inner tube 3, and the front section of the flexible circuit board 7; the camera assembly includes a CMOS lens 12 and a plurality of LED lights 13, the CMOS lens 12 is arranged at the front section of the flexible circuit board 7, and the plurality of LED lights 13 are evenly distributed around the CMOS lens 12 and are arranged at the front section of the flexible circuit board 7.

[0050] Specifically, the glass sheet 14 is made of a sapphire glass sheet 14 with high transparency, high hardness and corrosion resistance. The glass sheet 14 is sealed between the front end of the inner wall of the outer sheath 2 and the front end of the top wall of the inner tube 3. The front end of the flexible circuit board 7 is vertically sealed between the inner wall of the outer sheath 2 and the top wall of the inner tube 3, and is set at a certain distance from the glass sheet 14 to form a sealed cavity, which is used to protect the CMOS lens 12 and multiple LED lights 13 from damage, so as to ensure normal use during ureteroscopy. Among them, the CMOS lens 12 has a high degree of integration and a high definition of the captured image, which can increase pixels and eliminate moiré patterns, thereby improving the quality of pictures taken by the ureteroscope, and multiple LED lights 13 are evenly arranged around the CMOS lens 12. If the LED lights 13 are set to three, the three LEDs are respectively arranged at 9 o'clock, 12 o'clock and 3 o'clock directions of the CMOS lens 12 to provide uniform and sufficient illumination, further improving the quality of pictures taken by the ureteroscope, so that medical staff can quickly determine the location of the lesion, that is, quickly and accurately break up ureteral stones, thereby improving the surgical efficiency and quality of the ureteroscope.

[0051] Optionally, the CMOS lens 12 and the multiple LED lights 13 are fixed to the front section of the flexible circuit board 7 by welding to improve the firmness of the installation of the camera assembly. After the welding is completed, the outer layer of the CMOS lens 12, the multiple LED lights 13 and the flexible circuit board 7 is evenly coated with a transparent insulating coating, which can play a role in protecting the circuit.

[0052] To further protect the flexible circuit board 7, based on the above embodiment, please refer to Figure 1 and Figure 6 A video connecting tube 10 connected to the first external channel 4 is provided on the mirror body 1. A video plug 11 for inserting into a plug socket of a host is provided at one end of the video connecting tube 10 away from the mirror body 1. The rear section of the flexible circuit board 7 is fixed to the video plug 11 via the first external channel 4, the mirror body 1 and the video connecting tube 10 in sequence.

[0053] It is understandable that the video connection tube 10 is made of metal material, while the flexible circuit board 7 is made of plastic material. The hardness of the video connection tube 10 is better than that of the flexible circuit board 7. The rear section of the flexible circuit board 7 extends out of the scope body 1 and is fixed to the video plug 11 through the video connection tube 10. The video plug 11 is inserted into the plug socket of the host, so that the flexible circuit board 7 can be electrically connected to the host to transmit the collected image. Among them, the video connection tube 10 can protect the flexible circuit board 7 to ensure that the ureteroscope can normally transmit images to the host, that is, to ensure the normal use of the ureteroscope during surgery, thereby improving the reliability of the ureteroscope.

[0054] In order to improve the comfort of medical staff using ureteroscope, based on the above embodiments, please refer to Figure 6The tube section of the video connecting tube 10 adjacent to the mirror body 1 is bent at a certain angle toward the rear end of the mirror body 1 to form a first bent section, and the tube section of the video connecting tube 10 adjacent to the video plug 11 is bent at a certain angle toward the rear end of the mirror body 1 to form a second bent section.

[0055] Specifically, the video connecting tube 10 includes a first bending section, a straight section and a second bending section. One end of the first bending section is welded to the mirror body 1, and the other end faces the rear end of the mirror body 1 and is bent at an angle a with the direction perpendicular to the axis of the mirror body 1 to form the first bending section. The angle a can be 50°±5°, so that the first bending section fits the base of the hand. After the first bending section is bent, it extends along a straight line for a distance of one end to form a straight section. The end of the straight section adjacent to the video plug 11 faces the rear end of the mirror body 1 and is bent at an angle b with the axis of the straight section to form the second bending section. The angle b can be 155°±5°, so that the second bending section fits the palm, thereby improving the comfort of medical staff holding the video connecting tube 10 and avoiding wrist fatigue caused by long-term holding.

[0056] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0057] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0058] The above is a detailed introduction to the rigid ureteroscope provided by the utility model. This article uses specific examples to illustrate the principles and implementation methods of the utility model. The description of the above embodiments is only used to help understand the method and core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A rigid ureteroscope, characterized in that: The scope comprises a mirror body (1), wherein the front end of the mirror body (1) is provided with an outer sheath tube (2) and an inner tube (3), wherein the inner tube (3) is sleeved inside the outer sheath tube (2) and its interior is divided into a first outer channel (4) and a second outer channel (5), and the rear end of the mirror body (1) is provided with an instrument channel opening (6) which is in communication with the inner tube (3) and is used for introducing an instrument tube into the ureter through the inner tube (3) to crush stones; A bent flexible circuit board (7) is provided in the first outer channel (4), and a sealed cavity is formed between the front section of the flexible circuit board (7) and the front end of the first outer channel (4), for sealing and accommodating a camera assembly placed on the front section of the flexible circuit board (7); the rear section of the flexible circuit board (7) passes through the mirror body (1) through the rear end of the first outer channel (4), for being electrically connected to a host; The second outer channel (5) is connected to a perfusion interface (8) provided on the mirror body (1), and the inner tube (3) is connected to a suction interface (9) provided on the mirror body (1), so that physiological saline is poured into the ureter through the second outer channel (5) to wash the lithotripsy, and at the same time, the lithotripsy is sucked out of the body through the inner tube (3).

2. The rigid ureteroscope according to claim 1, characterized in that: The front ends of the inner tube (3) and the outer sheath tube (2) adjacent to the second outer channel (5) are cut together to form an arc-shaped groove (15).

3. The rigid ureteroscope according to claim 1, characterized in that: The outer sheath tube (2) comprises an elliptical tube segment (21) and a circular tube segment (22) which are connected together, the circular tube segment (22) being connected between the elliptical tube segment (21) and the scope body (1), and the cross-sectional area of ​​the elliptical tube segment (21) along its short axis direction is smaller than the cross-sectional area of ​​the circular tube segment (22), and the cross-sectional area of ​​the elliptical tube segment (21) along its long axis direction is larger than the cross-sectional area of ​​the circular tube segment (22).

4. The rigid ureteroscope according to claim 3, characterized in that: The unprocessed outer sheath tube (2) is a round tube, the front end of the round tube is pressed toward each other to form the round tube section (22), and the rear end of the round tube forms the round tube section (22), so that the outer sheath tube (2) is pressed and formed in one piece.

5. The rigid ureteroscope according to claim 3, characterized in that: The outer surface of the circular pipe section (22) is coated with a strengthening layer made by shot peening.

6. The rigid ureteroscope according to claim 3, characterized in that: The two side walls of the inner tube (3) are sealed and connected to the two side walls of the elliptical tube segment (21) along its short axis direction in a one-to-one correspondence; the top wall of the inner tube (3) is a flat plate structure, and together with the inner walls of the elliptical tube segment (21) and the circular tube segment (22) form the first outer channel (4); the bottom wall of the inner tube (3) is an arched structure protruding outwards, and together with the inner walls of the elliptical tube segment (21) and the circular tube segment (22) form the second outer channel (5).

7. The rigid ureteroscope according to claim 1, characterized in that: The front section of the flexible circuit board (7) is arranged vertically, and the rear section is arranged horizontally, so as to form the flexible circuit board (7) with an L-shaped structure, and the flexible circuit board (7) is sealed by glue filling in the first outer channel (4).

8. The rigid ureteroscope according to claim 1, characterized in that: The glass sheet (14) is sealed at the front end of the first outer channel (4) and is used to enclose the sealed cavity together with the inner wall of the outer sheath tube (2), the outer wall of the inner tube (3) and the front section of the flexible circuit board (7); The camera assembly comprises a CMOS lens (12) and a plurality of LED lights (13); the CMOS lens (12) is arranged at the front section of the flexible circuit board (7); and the plurality of LED lights (13) are evenly distributed around the CMOS lens (12) and arranged at the front section of the flexible circuit board (7).

9. The rigid ureteroscope according to any one of claims 1 to 8, characterized in that: The mirror body (1) is provided with a video connection tube (10) connected to the first external channel (4); an end of the video connection tube (10) away from the mirror body (1) is provided with a video plug (11) for inserting into a plug socket of the host; the rear section of the flexible circuit board (7) is fixed to the video plug (11) via the first external channel (4), the mirror body (1) and the video connection tube (10) in sequence.

10. The rigid ureteroscope according to claim 9, characterized in that: The tube section of the video connection tube (10) adjacent to the mirror body (1) is bent at a certain angle toward the rear end of the mirror body (1) to form a first bent section, and the tube section of the video connection tube (10) adjacent to the video plug (11) is bent at a certain angle toward the rear end of the mirror body (1) to form a second bent section.

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