Cystoscope with sampling function
By introducing the insertion length reminder control structure and optimized hole design into the cystoscope, the problem of difficult to control the depth of the cystoscope insertion is solved, and effective protection of the patient's bladder and accuracy of examination is achieved.
Patent Information
- Application Number
- CN202521063158.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-28
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2035-05-28
AI Technical Summary
During the use of existing cystoscopy, due to the lack of corresponding mechanisms to limit the depth of pushing, it is easy to cause damage to the patient's bladder wall and even bladder perforation.
A cystoscope with an insertion length reminder control structure is designed, including a sliding rod and a positioning reminder ring, which limits the insertion depth by adjusting the position of the sliding rod, and a scale bar and a scale pointer are provided on the surface of the mirror sheath to improve the accuracy of the insertion, while optimizing the design of the back and outlet holes to prevent clogging.
Effectively protect the patient's bladder, reduce the probability of injury during the examination, ensure the accuracy and smoothness of the insertion, and prevent the return fluid hole from being blocked, and improve the inspection efficiency.
Smart Images
Figure CN223068507U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of instruments for bladder examination, in particular to a cystoscope with a sampling function. Background Art
[0002] A medical endoscope is used to directly observe the internal structures of the bladder and urethra, and is widely used in the diagnosis and treatment of urinary system diseases. Through the cystoscope, doctors can visually examine whether there are abnormalities (such as tumors, stones, inflammation, etc.) in the bladder mucosa and urethra, and can perform minimally invasive operations such as biopsy, foreign body removal, and resection. Existing cystoscopes mainly include two types, one is a rigid cystoscope, and the other is a flexible cystoscope. The rigid cystoscope is made of a rigid metal tube, with a relatively large diameter (16 - 22Fr), non-flexible. Its advantages are stable imaging, a spacious operation channel, and a relatively low price, which is suitable for the general public. The disadvantage is that the patient suffers great pain during use. The flexible cystoscope uses flexible materials (such as high molecular polymers) and a nitinol alloy framework, with a relatively thin diameter (12 - 16Fr), and can be bent in two directions. Its advantages are that the patient suffers less pain during use and can observe the dead corners of the bladder from multiple angles. The disadvantage is that the use price is relatively high. In China, most patients will choose a rigid cystoscope for bladder examination. Generally speaking, the existing rigid cystoscope is a relatively mature medical instrument, but some problems have still been found during its use. That is, there are many interns in the hospital, and these interns often lack sufficient experience. Therefore, during the process of using the cystoscope to examine patients, it is easy to fail to master the pushing size well. If the pushing depth is insufficient, it will affect the examination results. If the pushing depth is too deep, it will cause damage to the patient's bladder wall, resulting in mild bladder mucosa injury or severe bladder perforation. In order to minimize the harm to patients as much as possible, it is necessary to improve the existing cystoscope. Summary of the Utility Model
[0003] The purpose of the utility model is to provide a cystoscope with a sampling function to solve the problem that existing cystoscopes generally do not have a corresponding mechanism to limit the pushing depth.
[0004] To solve the above technical problems, the utility model adopts the following technical solutions:
[0005] A cystoscope with a sampling function, comprising a sheath, an operating device, a lens body and a sampling forceps. The sheath includes an outer sheath and an inner sheath. A liquid channel is provided between the inner wall of the outer sheath and the outer wall of the inner sheath. The liquid channel includes a liquid supply channel and a liquid return channel. The liquid inlet end of the liquid supply channel is connected to a liquid supply port provided on the surface of the outer sheath, and the liquid outlet end of the liquid return channel is connected to a drain port provided on the surface of the outer sheath. The operating device is detachably arranged at the instrument insertion end of the sheath. The lens body is inserted at the lens body channel jointly constructed by the sheath and the operating device, and the sampling forceps are inserted at the sampling forceps channel jointly constructed by the sheath and the operating device. An insertion length reminder control structure is provided on the side of the operating device. The insertion length reminder control structure includes a connecting block, a sliding rod and a positioning reminder ring. The connecting block is fixed on the side of the operating device. The sliding rod is arranged parallel to the sheath. The sliding rod is slidably connected to the connecting block. A sliding rod positioning mechanism is provided on the side of the connecting block. The positioning reminder ring is fixed at one end of the sliding rod. The positioning reminder ring surrounds the sheath.
[0006] First, combine the obturator and the sheath, and then insert them into the patient's bladder through the urethra. After insertion, remove the obturator, connect the operating device to the outer end of the sheath, and then insert the lens body through the lens body insertion port at the outer end of the operating device. Connect the light source to check the bladder. When sampling is required, insert the sampling forceps through the sampling forceps insertion port of the operating device, and the required sample can be taken out through the sampling forceps. In this solution, an insertion length reminder control structure is added. Its working principle is that first, judge the optimal insertion depth according to the patient's gender, age, color Doppler ultrasound, etc., and then loosen the sliding rod positioning mechanism. After loosening the sliding rod positioning mechanism, manually adjust the sliding rod. By sliding the sliding rod, the position of the positioning reminder ring can be adjusted. After adjustment, use the sliding rod positioning mechanism to fix the sliding rod. In this way, during the insertion process, once inserted to the appropriate position, the positioning reminder ring will contact the patient's urethral orifice and cannot be inserted further. In this way, the patient's bladder can be effectively protected. Moreover, since the positioning reminder ring is not directly arranged on the surface of the sheath, it will not affect the smoothness of the sheath surface, so it will not affect the smoothness of the insertion process of the sheath.
[0007] As a further preference of the present utility model, a sampling forceps insertion port is provided on the bottom surface of the operating device, and a lens body insertion port is provided at the other end of the operating device connected to the sheath. A light guide beam joint is provided at the top of the lens body.
[0008] As a further preference of the present utility model, the sliding rod positioning mechanism includes a threaded hole and a rotary pressing structure. The threaded hole is opened on the side of the connecting block. The rotary pressing structure includes a threaded rod and a tightening head. The threaded rod is inserted at the threaded hole and is threadedly connected to the threaded hole. The inner end of the threaded rod touches the sliding rod, and the outer end of the threaded rod is connected to the tightening head.
[0009] Such a positioning mechanism is simple, and the compression positioning and loosening of the sliding rod can be achieved by tightening and loosening the threaded rod.
[0010] As a further preferred embodiment of the present invention, a scale bar is drawn on the outer surface of the mirror sheath for use with the positioning reminder ring.
[0011] First of all, the scale bar here is painted, so there will be no obvious convex feeling, and it will not cause a major impact on the smooth insertion of the endoscope sheath. Then, the scale bar is set here, which allows the operating doctor to see the insertion depth more intuitively, and also allows the operating doctor to adjust the position of the positioning reminder ring more conveniently and accurately.
[0012] As a further preferred embodiment of the present invention, the positioning reminder ring includes a ring body and a rubber cushion layer, and the rubber cushion layer is arranged at an end of the ring body facing the patient.
[0013] The rubber pad can play a role of flexible contact.
[0014] As a further preferred embodiment of the present invention, the rubber cushion layer is bonded to the ring body, and the inner ring wall of the rubber cushion layer is also provided with a scale pointer, which is arranged toward the center of the annular structure, and the inner end of the scale pointer is in close contact with the outer wall of the mirror sheath.
[0015] Setting a scale pointer can avoid visual errors as much as possible, making the position of the positioning reminder ring more accurately adjusted, which can further reduce the probability of patient injury during the examination.
[0016] As a further preferred embodiment of the present invention, it also includes an obturator used in conjunction with the endoscope sheath during the insertion process.
[0017] As a further preferred embodiment of the utility model, a liquid outlet hole row and a liquid return hole row are provided at an inner end of the sheath wall of the outer sheath, and the liquid outlet hole row and the liquid return hole row are respectively located at the liquid outlet end of the liquid supply channel and the liquid inlet end of the liquid return channel, the liquid outlet hole row is composed of evenly arranged liquid outlet holes, and the liquid return hole row is composed of evenly arranged liquid return holes, and the diameter of the liquid outlet hole is larger than the diameter of the liquid return hole.
[0018] Since most patients who come for examination have some lesions in their bladders, there are often some tissue debris in the bladder. This part of tissue debris often does not affect the discharge of liquid from the liquid outlet, but it will affect the return of liquid from the liquid return hole. Because the liquid return hole sucks liquid from the bladder, tissue debris can easily enter the liquid return hole and cause blockage. In order to solve the above problem, in this scheme, it is chosen to set the liquid return hole smaller, so that tissue debris is not easy to enter the liquid return hole and blockage is not easy to occur. In addition, the larger liquid outlet can support high flow, meeting the requirements of rapid injection of liquid to expand the bladder and flush the field of vision.
[0019] As a further preferred embodiment of the present invention, a slag blocking sheet is evenly provided on the hole wall surface of the liquid return hole.
[0020] The slag blocking piece arranged on the wall of the liquid return hole can further enhance its function of preventing tissue debris from entering.
[0021] Compared with the prior art, the utility model can achieve at least one of the following beneficial effects:
[0022] 1. First, combine the obturator and the scope sheath together, and then insert it into the patient's bladder from the urethra. After insertion, remove the obturator, connect the operator to the outer end of the scope sheath, and then insert the scope from the scope insertion port at the outer end of the operator. Connect the light source to check the bladder. When sampling is required, insert the sampling forceps from the sampling forceps insertion port of the operator, and the required sample can be taken out through the sampling forceps. In this solution, an insertion length reminder control structure is added. Its working principle is to first determine the optimal insertion depth according to the patient's gender, age, color ultrasound and other conditions, and then release the slide Rod positioning mechanism, loosen the sliding rod positioning mechanism and manually adjust the sliding rod, the position of the positioning reminder ring can be adjusted by sliding the sliding rod, after adjustment, use the sliding rod positioning mechanism to fix the sliding rod, so that during the insertion process, once inserted into the appropriate position, the positioning reminder ring will contact the patient's urethral opening and cannot go deeper, so that the patient's bladder can be effectively protected. Moreover, since the positioning reminder ring is not directly set on the surface of the mirror sheath, it will not affect the smoothness of the mirror sheath surface, and therefore will not affect the smoothness of the insertion process of the mirror sheath.
[0023] 2. The positioning mechanism is simple, and the compression, positioning and loosening of the sliding rod can be achieved by tightening and loosening the threaded rod.
[0024] 3. The scale bar is painted on, so there will be no obvious convex feeling, and it will not cause a major impact on the smooth insertion of the mirror sheath. Then the scale bar is set here, which allows the operating doctor to see the insertion depth more intuitively, and also allows the operating doctor to adjust the position of the positioning reminder ring more conveniently and accurately.
[0025] 4. The rubber cushion layer can play the role of flexible contact.
[0026] 5. Setting the scale pointer can avoid visual errors as much as possible, making the position of the positioning reminder ring more accurately adjusted, which can further reduce the probability of patient injury during the examination.
[0027] 6. Since most patients coming for examinations will have some lesions in the bladder, there will often be some tissue debris in the bladder. This part of the tissue debris usually does not affect the liquid outflow from the liquid outlet hole, but it will affect the liquid return of the liquid return hole. Because the liquid return hole sucks liquid from the bladder, the tissue debris is likely to enter the liquid return hole and cause blockage. To solve the above problems, in this solution, it is chosen to make the liquid return hole smaller, so that the tissue debris is not easily enter the liquid return hole and the blockage problem is not likely to occur. In addition, the larger liquid outlet hole can support high flow rate and meet the requirements of quickly injecting liquid to expand the bladder and flush the field of view.
[0028] 7. The slag blocking piece arranged on the hole wall of the liquid return hole can further strengthen its function of preventing tissue debris from entering. Description of the Drawings
[0029] Figure 1 It is a schematic structural view of the present utility model.
[0030] Figure 2 It is a schematic structural view of the positioning reminder ring of the present utility model.
[0031] Figure 3 It is a schematic structural view of the liquid return hole of the present utility model.
[0032] 1 - mirror sheath, 11 - liquid supply port, 12 - liquid discharge port, 2 - operator, 3 - mirror body, 31 - light guide beam connector, 4 - sampling forceps, 5 - connecting block, 6 - sliding rod, 7 - positioning reminder ring, 71 - ring body, 72 - rubber cushion layer, 8 - sliding rod positioning mechanism, 9 - scale pointer, 10 - obturator, 13 - slag blocking piece. Detailed Embodiment
[0033] To make the purpose, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. Usually, the components of the embodiments of the present utility model described and shown in the drawings here can be arranged and designed in various different configurations.
[0034] Therefore, the detailed description of the embodiments of the present utility model provided in the drawings below is not intended to limit the scope of the present utility model to be protected, but only represents the selected embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0035] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.
[0036] It should be noted that like reference numerals and letters denote like items in the following figures. Therefore, once an item is defined in one figure, it is not necessary to further define and explain it in subsequent figures.
[0037] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is customarily placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive distinction and cannot be construed as indicating or implying relative importance.
[0038] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. Specific Embodiment 1:
[0040] Figure 1 、 Figure 2 、 Figure 3Disclosed is a cystoscope with a sampling function, which includes a sheath 1, an operating device 2, a lens body 3 and a sampling forceps 4. The sheath 1 includes an outer sheath and an inner sheath. A liquid channel is provided between the inner wall of the outer sheath and the outer wall of the inner sheath. The liquid channel includes a liquid supply channel and a liquid return channel. The liquid inlet end of the liquid supply channel is connected to a liquid supply port 11 provided on the surface of the outer sheath. The liquid outlet end of the liquid return channel is connected to a drain port 12 provided on the surface of the outer sheath. The operating device 2 is detachably arranged at the instrument insertion end of the sheath 1. The lens body 3 is inserted at the lens body channel jointly constructed by the sheath 1 and the operating device 2. The sampling forceps 4 are inserted at the sampling forceps channel jointly constructed by the sheath 1 and the operating device 2. An insertion length reminder control structure is provided on the side of the operating device 2. The insertion length reminder control structure includes a connection block 5, a sliding rod 6 and a positioning reminder ring 7. The connection block 5 is fixed on the side of the operating device 2. The sliding rod 6 is arranged parallel to the sheath 1. The sliding rod 6 is slidably connected to the connection block 5. A sliding rod positioning mechanism 8 is provided on the side of the connection block 5. The positioning reminder ring 7 is fixed at one end of the sliding rod 6. The positioning reminder ring 7 surrounds the sheath 1.
[0041] First, combine the obturator and the sheath together, and then insert them into the patient's bladder through the urethra. After insertion, remove the obturator, connect the operating device to the outer end of the sheath, and then insert the lens body through the lens body insertion port at the outer end of the operating device. Connect the light source to check the bladder. When sampling is required, insert the sampling forceps through the sampling forceps insertion port of the operating device, and the required sample can be taken out through the sampling forceps. In this solution, an insertion length reminder control structure is added. Its working principle is that first, judge the optimal insertion depth according to the patient's gender, age, color Doppler ultrasound, etc., and then loosen the sliding rod positioning mechanism. After loosening the sliding rod positioning mechanism, manually adjust the sliding rod. By sliding the sliding rod, the position of the positioning reminder ring can be adjusted. After adjustment, use the sliding rod positioning mechanism to fix the sliding rod. In this way, during the insertion process, once inserted to the appropriate position, the positioning reminder ring will contact the patient's urethral orifice and cannot be inserted further. In this way, the patient's bladder can be effectively protected. And because the positioning reminder ring is not directly set on the surface of the sheath, it will not affect the smoothness of the sheath surface, so it will not affect the smoothness of the insertion process of the sheath. Specific Embodiment 2:
[0043] This embodiment further describes the operating device 2 on the basis of Specific Embodiment 1. The bottom surface of the operating device 2 is provided with a sampling forceps insertion port. The other end of the operating device 2 connected to the sheath 1 is provided with a lens body insertion port. The top of the lens body 3 is provided with a light guide beam connector 31. Specific Embodiment 3:
[0045] This embodiment further illustrates the sliding rod positioning mechanism 8 on the basis of the specific embodiment 1. The sliding rod positioning mechanism 8 includes a threaded hole and a rotary clamping structure. The threaded hole is opened on the side of the connecting block 5. The rotary clamping structure includes a threaded rod and a tightening head. The threaded rod is inserted into the threaded hole and threadedly connected to the threaded hole. The inner end of the threaded rod touches the sliding rod 6, and the outer end of the threaded rod is connected to the tightening head.
[0046] Such a positioning mechanism is simple, and the compression positioning and loosening of the sliding rod can be achieved by tightening and loosening the threaded rod. Specific embodiment 4:
[0048] This embodiment further illustrates the mirror sheath 1 on the basis of the specific embodiment 1. The outer surface of the mirror sheath 1 is painted with a scale bar used in conjunction with the positioning reminder ring.
[0049] The scale bar is painted on, so there will be no obvious convex feeling, and it will not cause a major impact on the smooth insertion of the endoscope sheath. Then the scale bar is set here, which allows the operating doctor to see the insertion depth more intuitively, and also allows the operating doctor to adjust the position of the positioning reminder ring more conveniently and accurately. Specific embodiment 5:
[0051] This embodiment further illustrates the positioning reminder ring 7 on the basis of the specific embodiment 4. The positioning reminder ring 7 includes a ring body 71 and a rubber cushion layer 72. The rubber cushion layer 72 is arranged at the end of the ring body 71 facing the patient.
[0052] The rubber pad can play a role of flexible contact. Specific embodiment 6:
[0054] This embodiment further illustrates the rubber pad layer 72 based on the specific embodiment 5. The rubber pad layer 72 is bonded to the ring body 71. The inner ring wall of the rubber pad layer 72 is also provided with a scale pointer 9. The scale pointer 9 is set toward the center of the annular structure, and the inner end of the scale pointer 9 is close to the outer wall of the mirror sheath 1.
[0055] Setting a scale pointer can avoid visual errors as much as possible, making the position of the positioning reminder ring more accurately adjusted, which can further reduce the probability of patient injury during the examination. Specific embodiment 7:
[0057] This embodiment is based on the specific embodiment 1 and is provided with an obturator 10, and also includes the obturator 10 used together with the endoscope sheath 1 during the insertion process. Specific embodiment 8:
[0059] This embodiment further describes the outer sheath based on the specific embodiment 1. At the inner end of the sheath wall of the outer sheath, there are an effluent hole row and a return hole row. The effluent hole row and the return hole row are respectively located at the effluent end of the liquid supply channel and the inlet end of the return liquid channel. The effluent hole row is composed of evenly arranged effluent holes, and the return hole row is composed of evenly arranged return holes. The diameter of the effluent holes is larger than that of the return holes.
[0060] Since most patients coming for examinations will have some lesions in the bladder, there are often some tissue debris in the bladder. This part of the tissue debris usually does not affect the effluent of the effluent holes, but it will affect the return of the return holes. Because the return holes suck the liquid out of the bladder, the tissue debris is likely to enter the return holes and cause blockage. To solve the above problems, in this solution, the return holes are selected to be smaller, so that the tissue debris is not easily entered into the return holes and the blockage problem is not likely to occur. In addition, the larger effluent holes can support high flow rates and meet the requirements of quickly injecting liquid to expand the bladder and wash the field of view. Specific embodiment 9:
[0062] This embodiment further describes the return holes based on the specific embodiment 8. On the surface of the hole wall of the return holes, slag blocking pieces 13 are evenly arranged.
[0063] The slag blocking pieces arranged on the hole wall of the return holes can further strengthen their function of preventing tissue debris from entering.
[0064] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.
Claims
1. A cystoscope with a sampling function, comprising a sheath (1), an operating device (2), a lens body (3) and a sampling forceps (4). The sheath (1) includes an outer sheath and an inner sheath. A liquid channel is provided between the inner wall of the outer sheath and the outer wall of the inner sheath. The liquid channel includes a liquid supply channel and a liquid return channel. The liquid inlet end of the liquid supply channel is connected to a liquid supply port (11) provided on the surface of the outer sheath. The liquid outlet end of the liquid return channel is connected to a liquid discharge port (12) provided on the surface of the outer sheath. The operating device (2) is detachably provided at the instrument inlet end of the sheath (1). The lens body (3) is inserted into the lens body channel jointly constructed by the sheath (1) and the operating device (2). The sampling forceps (4) are inserted into the sampling forceps channel jointly constructed by the sheath (1) and the operating device (2). It is characterized in that: The side of the manipulator (2) is provided with an insertion length reminder control structure, which includes a connecting block (5), a sliding rod (6) and a positioning reminder ring (7). The connecting block (5) is fixed on the side of the manipulator (2). The sliding rod (6) is arranged parallel to the mirror sheath (1). The sliding rod (6) is slidably connected to the connecting block (5). A sliding rod positioning mechanism (8) is arranged on the side of the connecting block (5). The positioning reminder ring (7) is fixed at one end of the sliding rod (6). The positioning reminder ring (7) is arranged around the mirror sheath (1).
2. The cystoscope with a sampling function according to claim 1, characterized in that: The bottom surface of the manipulator (2) is provided with a sampling forceps insertion port. The other end of the manipulator (2) connected to the mirror sheath (1) is provided with a lens body insertion port. The top of the lens body (3) is provided with a light guide beam connector (31).
3. The cystoscope with a sampling function according to claim 1, wherein: The sliding rod positioning mechanism (8) includes a threaded hole and a rotary pressing structure. The threaded hole is opened on the side of the connecting block (5). The rotary pressing structure includes a threaded rod and a tightening head. The threaded rod is inserted at the threaded hole and is threadedly connected to the threaded hole. The inner end of the threaded rod touches the sliding rod (6). The outer end of the threaded rod is connected to the tightening head.
4. The cystoscope with a sampling function according to claim 1, characterized in that: A scale bar for use in conjunction with the positioning reminder ring is drawn on the outer surface of the mirror sheath (1).
5. The cystoscope with a sampling function according to claim 4, characterized in that: The positioning reminder ring (7) includes a ring body (71) and a rubber cushion layer (72). The rubber cushion layer (72) is arranged at the end of the ring body (71) facing the patient.
6. The cystoscope with a sampling function according to claim 5, characterized in that: The rubber cushion layer (72) is bonded to the ring body (71). A scale pointer (9) is further arranged on the inner ring wall of the rubber cushion layer (72). The scale pointer (9) is arranged towards the center of the ring structure. The inner end of the scale pointer (9) closely adheres to the outer wall of the mirror sheath (1).
7. The cystoscope with a sampling function according to claim 1, wherein: It further includes an obturator (10) used in conjunction with the mirror sheath (1) during insertion.
8. The cystoscope with a sampling function according to claim 1, wherein: At the inner end of the sheath wall of the outer sheath, there are a liquid outlet hole row and a liquid return hole row. The liquid outlet hole row and the liquid return hole row are respectively located at the liquid outlet end of the liquid supply channel and the liquid inlet end of the liquid return channel. The liquid outlet hole row is composed of uniformly arranged liquid outlet holes. The liquid return hole row is composed of uniformly arranged liquid return holes. The diameter of the liquid outlet holes is larger than that of the liquid return holes.
9. The cystoscope with a sampling function according to claim 8, characterized in that: The hole wall surface of the liquid return holes is uniformly provided with slag blocking pieces (13).