A disposable urethral bougie

Abstract

The present application relates to the technical field of medical apparatus and instruments, in particular to a disposable urethral bougie, which comprises an image acquisition rod and a capturing rod, the image acquisition rod comprises a main rod section and a bent head section, a working channel is further arranged in the main rod section, the capturing rod comprises a capturing section and a shaft rod section, the shaft rod section is arranged in the working channel, the capturing section and the bent head section have a first matching mode and a second matching mode, a limiting clamping groove is further arranged on the capturing section, the limiting clamping groove comprises a first groove section and a second groove section, a forceps channel is further arranged in the capturing rod, and the opening of the forceps channel is opposite to the limiting clamping groove. In the operation of capturing the curled end of a double J tube in the human body, the medical staff rotates the shaft rod section, so that the displacement path of the capturing section can accurately cover the space area where the target ureteral orifice is located, the defect that the axial displacement path of the traditional cystoscope and the space position of the ureteral orifice are difficult to coincide is effectively solved, and the operation success rate of capturing the curled end of the double J tube is improved.

Description

A disposable urethral probe Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a disposable urethral probe. Background Technology

[0002] The inventor's prior application (application number: CN202411722236.6) discloses a cystoscope capable of precisely locating a double-J stent. By incorporating a limiting plate, a limiting groove, and a guide plate at the distal end of the cystoscope's operating section, the originally curled end of the double-J stent can be unfurled after capture, allowing the end of the stent to be exposed on the surface of the limiting plate. This allows the sampling forceps to easily clamp the end of the double-J stent, preventing folding as it passes through the forceps channel. This improves the ease of double-J stent removal and allows medical personnel to more accurately assess the stent's position within the ureter, reducing the risk of ureteral damage during removal. However, some shortcomings remain, as detailed below:

[0003] When the bladder is full or distended, the anatomical positions of the two ureteral orifices on the bladder wall are significantly separated from the internal urethral orifice by a horizontal distance and spatial angle. This anatomical relationship makes it difficult for the cystoscope, which enters along the urethral axis, to effectively coincide with the spatial position of the target ureteral orifice during its axial movement within the bladder cavity. This greatly reduces the success rate of capturing the coiled end of the double-J stent. Furthermore, during the axial movement of the cystoscope, the limiting plate is prone to abutting the inner wall of the bladder, increasing the risk of bladder wall injury.

[0004] Therefore, in the removal of double-J stents, improving the success rate of capturing the coiled end of the double-J stent and reducing the risk of damaging the bladder wall during the operation are technical problems that urgently need to be solved in the existing technology. Summary of the Invention

[0005] The purpose of this invention is to address the problem in existing technologies where, when the bladder is full or distended, there is a significant horizontal distance and spatial angle between the anatomical positions of the two ureteral orifices on the bladder wall and the internal urethral orifice. This anatomical relationship makes it difficult for the displacement path (i.e., axial forward and backward movement) of the cystoscope entering along the urethral axis to effectively coincide with the spatial position of the target ureteral orifice, thus greatly reducing the success rate of capturing the coiled end of the double-J stent. Furthermore, during the axial forward and backward movement of the cystoscope, the limiting plate is prone to abutting the inner wall of the bladder, increasing the risk of damage to the bladder wall. Therefore, this invention provides a disposable urethral probe.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] A disposable urethral probe includes an image acquisition rod and a capture rod. The image acquisition rod includes a main rod section and a bent head section. The main rod section is used to support the human urethra. The cross-section of the bent head section is set with a semi-circular structure. The bent head section extends into the bladder. An imaging system for capturing images is provided on the bent head section. The main rod section and the bent head section are connected at an obtuse angle.

[0008] The main rod section is also provided with a working channel. The capturing rod includes a capturing section and a shaft section. The shaft section passes through the working channel. The cross-section of the capturing section is set as a semi-circular structure. The cross-sectional dimensions of the capturing section match the cross-sectional dimensions of the bending head section. The capturing section and the bending head section have a first mating mode and a second mating mode. In the first mating mode, the capturing section overlaps above the bending head section, and the two together form an approximately circular cross-section. After the capturing section and the bending head enter the bladder, the shaft section is rotated to separate the capturing section from the bending head section, and the two switch to the second mating mode.

[0009] A limiting slot is also provided on the capture section. The limiting slot includes a first slot segment and a second slot segment. The first slot segment is located at the position corresponding to the central axis of the capture section and extends towards the end of the capture section. The second slot segment extends obliquely towards one side of the shaft segment. One end of the second slot segment is connected to the first slot segment, and the other end penetrates through the side of the capture section. The opening position of the second slot segment penetrating through the side of the capture section matches the spatial height of the ureteral orifice in the human bladder. The width of the first slot segment matches the diameter of the double J tube in the human body, and the width of the second slot segment is greater than the width of the first slot segment. A forceps channel is also provided inside the capture rod for the sampling forceps to pass through. The opening of the forceps channel is directly opposite the limiting slot.

[0010] Preferably, the opening of the second groove section is configured as a flared structure.

[0011] Preferably, a partition plate is provided at the junction of the first groove segment and the second groove segment. The partition plate has a unidirectional conduction function. When the double J tube moves from the second groove segment to the first groove segment, the partition plate opens under the squeezing action of the double J tube to allow the double J tube to enter the first groove segment. After the double J tube has completely entered the first groove segment, the partition plate returns to the closed state, thereby preventing the double J tube from retreating from the first groove segment to the second groove segment.

[0012] Preferably, an elastic deformation section is further provided between the capturing section and the shaft section, a traction rope is also provided on the capturing section, a guide channel is provided on the shaft section, the traction rope passes through the guide channel, and an adjusting bolt is also provided at the end of the shaft section. The free end of the traction rope is connected to the adjusting bolt. By turning the adjusting bolt, the traction rope can be tightened or loosened, thereby adjusting the mating angle between the capturing section and the shaft section.

[0013] Preferably, when the pulling rope is fully relaxed, the central axis of the capture section coincides with or is parallel to the central axis of the shaft section.

[0014] Preferably, the bending head section includes an inclined section and a transition section. The transition section is vertically arranged and connected to the main rod section. In the second mating configuration, the capturing section and the bending head section can slide the shaft section outward by pulling it inward, thereby allowing the capturing section to slide into the range of the transition section.

[0015] Preferably, the capturing section is further provided with a receiving groove. When the capturing section and the bending head section are in the first mating state, the opening of the receiving groove faces the bending head section, the receiving groove covers the area of ​​the limiting slot, and the receiving groove extends through the end of the capturing section.

[0016] The capturing rod is also provided with a liquid injection channel, and the receiving tank is also provided with a limiting airbag. The limiting airbag is located at the end of the capturing section, and the liquid injection channel is connected to the limiting airbag. After the flushing liquid is injected into the limiting airbag through the liquid injection channel to make it expand, the limiting airbag closes the opening of the receiving tank in the end area of ​​the capturing section, so that the end area of ​​the capturing section forms a cavity structure.

[0017] In the operation of capturing the curled end of the double-J tube, after the double-J tube enters the first groove section, the adjusting bolt is turned to completely loosen the traction rope. Then, the shaft section is rotated to rotate the capturing section 180°. During this process, the opening of the limiting slot changes from facing the inner wall of the bladder to facing away from the inner wall of the bladder, and the double-J tube within the range from the first groove section to the end of the capturing section falls into the receiving groove. Subsequently, flushing fluid is injected into the limiting balloon through the injection channel to make it expand. The double-J tube within the range from the first groove section to the end of the capturing section is confined within the cavity structure formed at the end of the capturing section.

[0018] Preferably, when the limiting airbag is inflated, there is a gap between it and the end of the first groove segment.

[0019] Preferably, the end of the capturing section protrudes from the inflated state of the limiting airbag.

[0020] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0021] 1. The disposable urethral probe of this invention features a capture segment and a shaft segment with a specific obtuse angle bend. After entering the bladder, the capture segment naturally conforms to and closely follows the anatomical orientation of the bladder wall. During the capture of the coiled end of a double-J stent, the medical staff rotates the shaft segment to ensure that the displacement path of the capture segment accurately covers the spatial area where the target ureteral orifice is located. This effectively solves the problem of traditional cystoscopes having difficulty aligning their axial displacement path with the spatial position of the ureteral orifice, thus improving the success rate of capturing the coiled end of the double-J stent. Furthermore, in this embodiment, the rotation of the shaft segment during the capture of the coiled end of the double-J stent is isolated within the working channel, avoiding direct contact with the urethra and significantly reducing the risk of urethral tissue damage. Simultaneously, the capture segment in this solution moves along the arcuate surface of the bladder wall, achieving the capture of the coiled end of the double-J stent. This avoids puncturing the bladder wall during the procedure, effectively reducing the risk of bladder wall damage during operation.

[0022] 2. In the disposable urethral probe of the present invention, when the traction rope is fully relaxed, the central axis of the capture section coincides with or is parallel to the central axis of the shaft section. When the coiled end of the double-J tube enters the first groove section, the adjusting bolt is turned counterclockwise to fully relax the traction rope. At this time, the elastic deformation section returns to its natural state, and the central axis of the capture section coincides with or is parallel to the central axis of the shaft section. In this state, the sampling forceps and / or double-J tube pass through the forceps channel more smoothly, reducing the resistance caused by the angle between the capture section and the shaft section. This further ensures the accuracy of medical personnel in judging the status of the double-J tube passing through the ureter and reduces the risk of ureteral injury during double-J tube removal. Meanwhile, as the capture segment changes from a bent state to a state that coincides with or is parallel to the central axis of the shaft segment, it can further drive the curled end of the double-J tube to stretch. Compared with the method of relying on the capture segment to rotate against the inner wall of the bladder and pull the double-J tube to stretch it, the stretching process of the double-J tube can be more controllable and gentle, reducing the risk of ureteral damage due to excessive pulling force.

[0023] 3. The disposable urethral probe of the present invention, during the operation of unwinding the coiled segment of the double-J tube, forms a cavity structure composed of the receiving groove and the limiting airbag, which wraps and limits the double-J tube. This ensures that the end of the double-J tube that is finally exposed is directly in front of the forceps channel opening, so that the sampling forceps can accurately and quickly clamp the end of the double-J tube when passing through the forceps channel, improving the accuracy and convenience of clamping. Furthermore, when the double-J tube is wrapped and limited, the risk of the double-J tube slipping off the capture segment can be effectively reduced when unwinding its coiled segment, further ensuring the stability and reliability of the operation. Attached Figure Description

[0024] Figure 1 is a structural schematic diagram of the first mating configuration between the capture section and the bending head section;

[0025] Figure 2 is a structural schematic diagram of the second mating configuration between the capture section and the bending head section;

[0026] Figure 3 is an isometric structural diagram of the image acquisition rod;

[0027] Figure 4 is a schematic cross-sectional view of the capture section and the shaft section forming an obtuse angle fit when the traction rope is tightened.

[0028] Figure 5 is a schematic diagram of the structure in which the central axis of the capture section coincides with or is parallel to the central axis of the shaft section when the traction rope is relaxed.

[0029] Figure 6 is a schematic diagram of the structure of the double J tube after it falls into the receiving tank and is confined to the end region of the capture section to form a cavity structure.

[0030] Figure 7 is a schematic diagram of the structure of the protruding capture section end in the inflated state of the limiting airbag.

[0031] The markings in the diagram are: 1-Image acquisition rod, 2-Capture rod, 3-Main rod section, 4-Bending head section, 5-Working channel, 6-Capture section, 7-Shaft section, 8-Limiting slot, 9-First slot section, 10-Second slot section, 11-Clamping channel, 12-Isolation plate, 13-Pull rope, 14-Guide channel, 15-Adjusting bolt, 16-Inclined part, 17-Transition part, 18-Accommodation tank, 19-Injection channel, 20-Limiting airbag, 21-Elastic deformation section. Detailed Implementation

[0032] The present invention will now be described in detail with reference to the accompanying drawings.

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0034] Example 1: As shown in Figures 1, 2, and 5, the disposable urethral probe of the present invention includes an image acquisition rod 1 and a capture rod 2. The image acquisition rod 1 includes a main rod section 3 and a bent head section 4. The main rod section 3 is used to support the human urethra. The cross-section of the bent head section 4 is set as a semi-circular structure. The bent head section 4 extends into the bladder. An imaging system for capturing images is provided on the bent head section 4. The main rod section 3 and the bent head section 4 are connected at an obtuse angle.

[0035] The main rod section 3 is also provided with a working channel 5. The capturing rod 2 includes a capturing section 6 and a shaft section 7. The shaft section 7 passes through the working channel 5. The cross-section of the capturing section 6 is set as a semi-circular structure. The cross-sectional dimensions of the capturing section 6 match the cross-sectional dimensions of the bending head section 4. The capturing section 6 and the bending head section 4 have a first mating form and a second mating form. In the first mating form, the capturing section 6 overlaps above the bending head section 4, and the two together form an approximately circular cross-section. After the capturing section 6 and the bending head enter the bladder, the shaft section 7 is rotated to separate the capturing section 6 from the bending head section 4, and the two switch to the second mating form.

[0036] A limiting groove 8 is also provided on the capture section 6. The limiting groove 8 includes a first groove section 9 and a second groove section 10. The first groove section 9 is located at the position of the central axis of the capture section 6 and extends towards the end of the capture section 6. The second groove section 10 extends obliquely towards the side of the shaft section 7. One end of the second groove section 10 is connected to the first groove section 9, and the other end passes through the side of the capture section 6. The opening position of the second groove section 10 passing through the side of the capture section 6 matches the spatial height of the ureteral orifice in the human bladder. The groove width of the first groove section 9 matches the diameter of the double J tube in the human body, and the groove width of the second groove section 10 is greater than the groove width of the first groove section 9. A forceps channel 11 is also provided inside the capture rod 2. The forceps channel 11 is used for the sampling forceps to pass through, and the opening of the forceps channel 11 is directly opposite the limiting groove 8.

[0037] Using the disposable urethral probe described in this invention, the capture segment 6 and the shaft segment 7 are configured with a specific obtuse angle bend. After entering the bladder, the capture segment 6 can more naturally conform to and closely follow the anatomical direction of the bladder wall. During the capture of the coiled end of the double-J stent in the human body, medical personnel rotate the shaft segment 7 to ensure that the displacement path of the capture segment 6 can accurately cover the spatial area where the target ureteral orifice is located. This effectively solves the defect that the axial displacement path of the traditional cystoscope is difficult to coincide with the spatial position of the ureteral orifice, and improves the success rate of capturing the coiled end of the double-J stent. Furthermore, in this embodiment, during the capture of the coiled end of the double-J stent, the rotation of the shaft segment 7 is isolated within the working channel 5, avoiding direct contact with the urethra, thereby significantly reducing the risk of urethral tissue damage. At the same time, in this solution, the capture segment 6 moves in accordance with the arcuate direction of the bladder wall to capture the coiled end of the double-J stent, which can avoid the puncturing action on the bladder wall during the operation, thereby effectively reducing the risk of bladder wall damage during the operation.

[0038] Specifically, in this solution, when the urethral probe is used, the image acquisition rod 1 and the capture rod 2, which are in the first mating state, are first inserted into the urethra together. Since the capture section 6 overlaps above the bent head section 4 at this time, the two together form an approximately circular cross section, which can effectively reduce the stimulation and damage to the urethral mucosa and ensure the smoothness of the insertion process. The obtuse angle connection between the bent head section 4 and the main shaft section 3 allows the bent head section 4 to conform to the inner wall of the bladder after entering it, and its head can naturally face the ureteral orifice. With the imaging system on it, images of the coiled end of the double-J tube inside the bladder can be clearly captured. In the operation of capturing the coiled end of the double-J tube inside the human bladder, medical staff rotate the shaft section 7 to separate the capturing section 6 from the bent head section 4 and switch to the second engagement mode. During this process, the capturing section 6 always moves in conformity to the inner wall of the human bladder. When the capturing section 6 passes the ureteral orifice, the double-J tube body enters the limiting groove 8. As the capturing section 6 gradually moves away from the ureteral orifice, the coiled end of the double-J tube slides from the second groove section 10 to the first groove section 9 under the pulling action of the capturing section 6, and the coiled double-J tube gradually unwinds. At this time, medical staff can insert sampling forceps through the forceps channel 11 inside the capture rod 2, and use the real-time image guidance of the imaging system to accurately clamp the end of the double J tube located in the first slot 9, and safely and smoothly pull the double J tube out of the body.

[0039] It should be noted that the clamp channel 11 described in this embodiment can be used as a bladder irrigation channel. During the capture of the coiled end of the double-J tube, if there are many flocculent deposits in the bladder or the field of vision is blurred and affects observation, sterile saline or other irrigation fluid can be continuously injected into the bladder through the clamp channel 11. The flow of the irrigation fluid flushes the inner wall of the bladder and the area around the double-J tube to quickly clear the field of vision and ensure that the imaging system can capture images clearly. Furthermore, by infusing irrigation fluid, the expansion of the bladder can be adjusted to make the bending angle of the acquisition rod and the capture rod 2 fit better with the inner wall of the bladder, further improving the stability and accuracy of the operation.

[0040] In a preferred embodiment, based on the above method, the opening of the second groove segment 10 is further configured as a flared structure. This structural design significantly increases the opening size of the limiting slot 8. When the capturing segment 6 moves within the bladder, even if there is a certain deviation between the opening and the relative position of the double-J tube, the flared opening can guide the double-J tube into the second groove segment 10, reducing the requirements for operational precision and improving capture efficiency. Specifically, the edge of the flared opening is rounded to avoid potential scratches to the bladder mucosa caused by sharp structures, further enhancing the safety of the invention in practical use.

[0041] In a preferred embodiment, based on the above method, a partition plate 12 is further provided at the junction of the first groove segment 9 and the second groove segment 10. The partition plate 12 has a unidirectional conduction function. When the double J tube moves from the second groove segment 10 to the first groove segment 9, the partition plate 12 opens under the squeezing action of the double J tube to allow the double J tube to enter the first groove segment 9. After the double J tube has completely entered the first groove segment 9, the partition plate 12 returns to the closed state, thereby preventing the double J tube from retreating from the first groove segment 9 to the second groove segment 10.

[0042] Specifically, in this embodiment, the isolation plate 12 is made of medical-grade silicone material with elastic properties. Two isolation plates 12 are provided, positioned opposite each other on both sides of the central axis of the first groove segment 9. The free ends of the two isolation plates 12 naturally approach each other, forming a structure that closes the connection between the first groove segment 9 and the second groove segment 10. When the double-J tube moves from the second groove segment 10 to the first groove segment 9, the tube body applies a compressive force to the isolation plate 12 towards the first groove segment 9, causing the isolation plate 12 to undergo elastic deformation. Consequently, its free ends move away from each other, forming a channel for the double-J tube to pass through. When the double-J tube is fully inserted into the first groove segment 9, the isolation plate 12 returns to its initial shape under its own elasticity, and the free ends re-close, closing the connection. This structural design ensures that the double-J tube remains stably within the first groove segment 9 before being clamped by the sampling forceps, preventing the double-J tube from slipping back into the second groove segment 10 due to changes in patient position or slight movement of the instrument during operation, effectively improving the reliability of the capture operation.

[0043] Example 2: As shown in Figures 1 to 5, the disposable urethral probe of the present invention, based on the above method, further includes an elastic deformation section 21 between the capture section 6 and the shaft section 7, a pull rope 13 on the capture section 6, a guide channel 14 on the shaft section 7, the pull rope 13 passing through the guide channel 14, and an adjusting bolt 15 at the end of the shaft section 7. The free end of the pull rope 13 is connected to the adjusting bolt 15. By turning the adjusting bolt 15, the pull rope 13 can be tightened or loosened, thereby adjusting the mating angle between the capture section 6 and the shaft section 7.

[0044] In this embodiment, the elastic deformation segment 21 is made of medical-grade elastic silicone material, which has excellent elastic recovery characteristics. It can produce controllable bending deformation when subjected to the tension of the traction rope 13, and can return to its initial shape after the external force is removed. Specifically, in the operation of capturing the double J tube, if it is necessary to bend the capturing segment 6 towards the shaft segment 7, the adjusting bolt 15 can be turned clockwise. At this time, the traction rope 13 is tightened under the action of the adjusting bolt 15. Under the tension applied by the traction rope 13, the degree of bending deformation of the elastic deformation segment 21 is intensified, and the capturing segment 6 deflects towards the shaft segment 7. If it is necessary to increase the bending angle of the capturing segment 6, the adjusting bolt 15 is turned counterclockwise. The traction rope 13 is loosened, and the elastic deformation segment 21 gradually returns to its original shape under its own elasticity, driving the capturing segment 6 away from the shaft segment 7. This design allows the fixed angle of the capture section 6 to be flexibly and finely adjusted according to the actual anatomical structure inside the bladder and the position of the double-J tube, further improving the capture accuracy and operational flexibility of the coiled end of the double-J tube.

[0045] As a preferred embodiment, based on the above method, further, when the pulling rope 13 is completely relaxed, the central axis of the capturing section 6 coincides with or is parallel to the central axis of the shaft section 7.

[0046] In this embodiment, after the coiled end of the double-J tube enters the first groove section 9, the adjusting bolt 15 is turned counterclockwise to completely relax the traction rope 13. At this time, the elastic deformation section 21 returns to its natural state, and the central axis of the capture section 6 coincides with or is parallel to the central axis of the shaft section 7. In this state, the sampling forceps and / or double-J tube pass through the forceps channel 11 more smoothly, reducing the resistance caused by the angle between the capture section 6 and the shaft section 7. This further ensures the accuracy of medical personnel in judging the status of the double-J tube passing through the ureter and reduces the risk of ureteral injury during double-J tube removal. Meanwhile, as the capture segment 6 changes from a bent state to a state that coincides with or is parallel to the central axis of the shaft segment 7, it can further drive the curled end of the double-J tube to stretch. Compared with the method of relying on the capture segment 6 to rotate against the inner wall of the bladder and pull the double-J tube to stretch it, the stretching process of the double-J tube is more controllable and gentle, reducing the risk of ureteral damage due to excessive pulling force.

[0047] Example 3: As shown in Figures 2 and 3, the disposable urethral probe of the present invention, based on the above method, further includes an inclined section 4 with a transition section 16 and a transition section 17. The transition section 17 is vertically arranged and connected to the main rod section 3. In the second engagement state, the capture section 6 and the bent head section 4 pull the shaft section 7 outward, allowing the capture section 6 to slide into the range of the transition section 17.

[0048] In this embodiment, when the capturing segment 6 and the bent head segment 4 are in their second engagement configuration, after the capturing segment 6 passes the ureteral orifice and successfully guides the double-J tube into the limiting slot 8, the shaft segment 7 is pulled outward. At this time, the capturing segment 6 can smoothly slide along the curvature of the bladder wall towards the transition portion 17 of the bent head segment 4. During this process, the double-J tube is guided more stably and quickly into the first slot segment 9, reducing the possibility of the double-J tube shifting or falling out in the limiting slot 8. On the other hand, in this embodiment, when the capturing segment 6 and the bent head segment 4 are in their second engagement configuration, pulling the shaft segment 7 outward can adjust the relative height between the side opening of the second slot segment 10 and the ureteral orifice in the human bladder. Specifically, when the curled end of the double-J tube is too high or too low, by finely adjusting and pulling the shaft segment 7, the opening of the second slot segment 10 can be more accurately aligned with the ureteral orifice, thus further improving the success rate of capturing the double-J tube.

[0049] Example 4: As shown in Figures 1 to 7, the disposable urethral probe of the present invention, based on the above method, further includes a receiving groove 18 in the capturing section 6. When the capturing section 6 and the bending head section 4 are in the first mating state, the groove of the receiving groove 18 faces the bending head section 4, the receiving groove 18 covers the area of ​​the limiting slot 8, and the receiving groove 18 penetrates through the end of the capturing section 6.

[0050] The capturing rod 2 is also provided with a liquid injection channel 19, and the receiving tank 18 is also provided with a limiting airbag 20. The limiting airbag 20 is located at the end of the capturing section 6, and the liquid injection channel 19 is connected to the limiting airbag 20. After the flushing liquid is injected into the limiting airbag 20 through the liquid injection channel 19 to make it expand, the limiting airbag 20 closes the opening of the receiving tank 18 in the end region of the capturing section 6, so that the end region of the capturing section 6 forms a cavity structure.

[0051] In the operation of capturing the curled end of the double-J tube, after the double-J tube enters the first groove section 9, the adjusting bolt 15 is turned to completely loosen the traction rope 13. Then, the shaft section 7 is rotated to rotate the capturing section 6 180°. During this process, the opening of the limiting slot 8 changes from facing the inner wall of the bladder to facing away from the inner wall of the bladder, and the double-J tube within the range from the first groove section 9 to the end of the capturing section 6 falls into the receiving groove 18. Subsequently, flushing fluid is injected into the limiting airbag 20 through the injection channel 19 to make it expand. The double-J tube within the range from the first groove section 9 to the end of the capturing section 6 is confined within the cavity structure formed at the end of the capturing section 6.

[0052] Specifically, in this embodiment, the width of the groove of the receiving tank 18 is greater than the diameter of the double-J tube; two limiting airbags 20 are provided, which are arranged opposite each other on the side of the receiving tank 18. When the limiting airbags 20 are not inflated, they adhere to the inner wall of the receiving tank 18 and do not affect the entry of the double-J tube into the receiving tank 18; after the double-J tube falls into the receiving tank 18, flushing fluid is injected through the injection channel 19, and the two limiting airbags 20 inflate symmetrically and move closer to each other, ultimately filling the groove of the receiving tank 18. A sealing structure is formed at the opening, stably confining the double-J tube within the cavity formed by the receiving groove 18 and the inflated limiting airbag 20. Then, by pulling the shaft section 7 outward and / or by turning the adjusting bolt 15 clockwise, the capturing section 6 is bent towards the shaft section 7, allowing the double-J tube to gradually pass through the cavity formed by the receiving groove 18 and the limiting airbag 20. Finally, the end of the double-J tube is exposed outside the cavity structure, which facilitates precise clamping of the sampling forceps and completion of the removal operation. With this structural design, during the operation of unwinding the coiled segments of the double-J tube, the cavity structure formed by the receiving groove 18 and the limiting airbag 20 wraps and limits the double-J tube. This ensures that the end of the double-J tube that is finally exposed is directly in front of the opening of the clamp channel 11, so that when the sampling forceps passes through the clamp channel 11, it can accurately and quickly clamp the end of the double-J tube, improving the accuracy and convenience of clamping. Furthermore, when the double-J tube is wrapped and limited, the risk of the double-J tube slipping off the capture segment 6 is effectively reduced when unwinding its coiled segments, further ensuring the stability and reliability of the operation.

[0053] It should be further explained that in this embodiment, when removing the double-J tube, the adjusting bolt 15 needs to be turned to completely loosen the traction rope 13; at the same time, during the tube removal process, the limiting airbag 20 is adjusted to a collapsed shape so that the double-J tube can pass smoothly through the receiving groove 18; furthermore, during the tube removal process, the end of the capturing section 6 can also be used to abut against the ureteral orifice to reduce the traction deformation of the ureteral orifice during the removal of the double-J tube, thereby reducing the risk of ureteral orifice damage.

[0054] In a preferred embodiment, based on the above method, the limiting airbag 20, in its inflated state, forms a gap between itself and the end of the first groove segment 9. With this structural arrangement, during the operation of unfolding the double-J tube coiled segment, the gap platform between the limiting airbag 20 and the first groove segment 9 can form a temporary exposure background for the end of the double-J tube, facilitating medical personnel to observe the specific shape and position of the double-J tube end through the imaging system, providing a clear visual reference for the subsequent precise clamping of the sampling forceps.

[0055] In a preferred embodiment, based on the above method, the limiting airbag 20 protrudes from the end of the capturing segment 6 when inflated. This structural arrangement creates a flexible buffer structure at the end of the capturing segment 6 and increases the contact area between the end of the capturing segment 6 and the bladder wall. Thus, when the end of the capturing segment 6 abuts against the ureteral orifice, the contact pressure can be effectively dispersed, preventing damage to the bladder wall or ureteral orifice mucosa due to excessive local pressure, thereby improving the safety of the invention in practical use.

[0056] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A disposable urethral probe, characterized in that, The system includes an image acquisition rod and a capture rod. The image acquisition rod includes a main rod section and a bent head section. The main rod section supports the human urethra. The bent head section has a semi-circular cross-section and extends into the bladder. An imaging system for capturing images is mounted on the bent head section. The main rod section and the bent head section are connected at an obtuse angle. A working channel is also provided within the main rod section. The capture rod includes a capture section and a shaft section. The shaft section passes through the working channel. The capture section has a semi-circular cross-section, and its cross-sectional dimensions match those of the bent head section. The capture section and the bent head section have a first engagement configuration and a second engagement configuration. The two engagement configurations are as follows: In the first engagement configuration, the capturing segment overlaps above the bending head segment, and the two together form an approximately circular cross-section. After the capturing segment and the bending head enter the bladder, the shaft segment is rotated to separate the capturing segment from the bending head segment, and the two switch to the second engagement configuration. A limiting groove is also provided on the capturing segment. The limiting groove includes a first groove segment and a second groove segment. The first groove segment is located at the position corresponding to the central axis of the capturing segment and extends towards one end of the capturing segment. The second groove segment extends obliquely towards one side of the shaft segment. One end of the second groove segment communicates with the first groove segment, and the other end passes through the side of the capturing segment. Furthermore, the second groove segment penetrates the opening on the side of the capture segment, matching the spatial height of the ureteral orifice in the human bladder. The groove width of the first groove segment matches the diameter of the double-J tube in the human body, and the groove width of the second groove segment is greater than that of the first groove segment. A forceps channel is also provided inside the capture rod, allowing the sampling forceps to pass through. The opening of the forceps channel faces the limiting slot. A partition plate is also provided at the junction of the first and second groove segments, and the partition plate has a unidirectional conduction function. When the double-J tube moves from the second groove segment to the first groove segment, the partition plate opens under the squeezing action of the double-J tube to allow the double-J tube to enter the first groove segment. When the double-J tube completely enters the second groove segment... After the first groove section, the isolation plate returns to its closed state, thereby preventing the double J tube from retracting from the first groove section to the second groove section; an elastic deformation section is also provided between the capture section and the shaft section, and a traction rope is also provided on the capture section, and a guide channel is provided on the shaft section. The traction rope passes through the guide channel, and an adjusting bolt is also provided at the end of the shaft section. The free end of the traction rope is connected to the adjusting bolt. By turning the adjusting bolt, the traction rope can be tightened or loosened, thereby adjusting the fitting angle between the capture section and the shaft section; when the traction rope is fully relaxed, the central axis of the capture section coincides with or is parallel to the central axis of the shaft section.The capturing section also includes a receiving groove. In the first mating configuration, the opening of the receiving groove faces the bending head section, the receiving groove covers the area of ​​the limiting slot, and extends through the end of the capturing section. The capturing rod also includes an injection channel, and a limiting airbag is located within the receiving groove at the end of the capturing section. The injection channel communicates with the limiting airbag. After flushing fluid is injected into the limiting airbag through the injection channel to inflate it, the limiting airbag seals the opening of the receiving groove in the end region of the capturing section, thus enabling the capturing rod to... The end region of the segment forms a cavity structure; during the capture operation of the curled end of the double-J tube, after the double-J tube enters the first groove segment, the adjusting bolt is turned to completely loosen the traction rope, and then the shaft segment is rotated to rotate the capture segment 180°. During this process, the opening of the limiting slot changes from facing the bladder wall to facing away from the bladder wall, and the double-J tube within the range from the first groove segment to the end of the capture segment falls into the receiving groove; subsequently, flushing fluid is injected into the limiting balloon through the injection channel to inflate it, and the double-J tube within the range from the first groove segment to the end of the capture segment is confined within the cavity structure formed at the end of the capture segment.

2. The disposable urethral probe according to claim 1, characterized in that, The opening of the second groove is designed as a flared structure.

3. The disposable urethral probe according to claim 2, characterized in that, The bending head section includes an inclined section and a transition section. The transition section is vertically arranged and connected to the main rod section. In the second mating configuration, the capturing section and the bending head section can pull the shaft section outward, allowing the capturing section to slide into the range of the transition section.

4. The disposable urethral probe according to claim 3, characterized in that, When the limiting airbag is inflated, there is a gap between it and the end of the first groove segment.

5. The disposable urethral probe according to claim 4, characterized in that, The end of the capture section protrudes from the inflated state of the limiting airbag.

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