Medical flushing catheter
By designing a medical flushing catheter used in conjunction with endoscopic catheter and sheath, enlarge the tube-sheath gap and combine automation and vibration technology, the problems of gravel blockage and prolonged surgical time are solved, achieving more efficient gravel discharge and surgical process optimization.
Patent Information
- Application Number
- CN202421034704.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-13
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-05-13
AI Technical Summary
During the use of endoscopic catheter and sheath tube, the tube-sheath gap is difficult to increase, resulting in gravel blockage and prolonged surgery. Repeated recoil removal operations are cumbersome, which can easily damage the urinary tract.
A medical flushing catheter is designed to be used in conjunction with the endoscopic catheter and the sheath tube. By setting the tube-sheath gap between the flushing catheter and the sheath tube, a larger gravel pass gap is achieved, and the gravel discharge efficiency is improved through automation and vibration technologies.
It significantly reduces the number of recoil removal operations during the operation, reduces the risk of gravel blockage, saves surgery time, and avoids sheath damage caused by repeated advancement and retreat of the endoscopic catheter.
Smart Images
Figure CN222788254U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a medical flushing catheter, belonging to the technical field of medical equipment products. Background Art
[0002] When using endoscopes such as flexible ureteroscopes for the treatment of ureteral obstruction or stones in clinical practice, they are usually used in conjunction with a sheath tube that acts as a channel and an endoscopic catheter. After the laser fiber enters the working channel of the endoscopic catheter for lithotripsy, the crushed stones flow out through the gap between the endoscopic catheter and the sheath tube. If the water flow is not smooth or the gap is blocked, the endoscope must be withdrawn in time. There are usually dozens or even hundreds of endoscope withdrawal operations in one operation, which is cumbersome and time-consuming. Even with the protection of the sheath tube, the repeated advancement and withdrawal of the endoscopic catheter will cause the sheath tube to swing frequently in the ureter, thereby damaging the urinary tract. Moreover, the suction of stones or tissue masses is usually carried out under the action of negative pressure. When the gap between the endoscopic catheter and the sheath is blocked, the negative pressure suction will fail. Since the endoscopic catheter needs to be equipped with optical components and a working channel for the laser optical fiber or stone capture basket to enter and exit, the diameter of the endoscopic catheter needs to be designed within a certain range, that is, the gap between the endoscopic catheter and the sheath is difficult to increase, which makes it easy for stones to block the gap between the endoscopic catheter and the sheath, reducing the efficiency of stone removal in the body, increasing the difficulty of negative pressure suction stone fragmentation, and greatly prolonging the operation time. Summary of the invention
[0003] The utility model provides a medical flushing catheter, which is used in conjunction with a sheath tube and an endoscope catheter. The relatively large tube-sheath gap is conducive to the discharge of broken stones out of the body along with the fluid, significantly reducing the number of endoscope withdrawal operations during surgery, reducing the risk of broken stones blocking the tube-sheath gap, and saving surgery time.
[0004] The purpose of the utility model is achieved in this way:
[0005] A medical flushing catheter is used in conjunction with an endoscope catheter and a sheath tube. The slender endoscope catheter is provided with an optical component and at least one working channel running through the head and tail. The working channel is provided with an inner working channel opening that enters the body when in use and an outer working channel opening that is located outside the body. The sheath tube is sleeved outside the endoscope catheter. The sheath tube is provided with an inner sheath tube opening that enters the body when in use and an outer sheath tube opening that is located outside the body. The flushing catheter enters the inner cavity of the sheath tube through a flushing side branch at the tail of the sheath tube. The flushing catheter is provided with an inner cavity of the flushing catheter and an inner flushing catheter opening that enters the body when in use and an outer flushing catheter opening that is located outside the body. When the flushing catheter and the endoscope catheter enter the inner cavity of the sheath tube respectively, a tube-sheath gap formed between the flushing catheter and the sheath tube is larger than a scope-sheath gap formed between the endoscope catheter and the sheath tube. When in use, when the top end of the endoscope catheter head retreats to a position adjacent to the outer sheath tube opening at the tail of the sheath tube, the flushing catheter enters the inner cavity of the sheath tube through the flushing side branch.
[0006] The inner opening of the working channel is arranged at the top of the endoscope catheter head.
[0007] The top of the endoscope catheter head is retreated to the position of the sheath tail adjacent to the outer opening of the sheath, which means that the endoscope catheter does not affect the position of the flushing catheter entering the sheath lumen through the flushing side branch, ensuring that the flushing catheter smoothly enters the sheath lumen through the flushing side branch lumen.
[0008] The tube-sheath gap formed between the flushing catheter and the sheath tube is larger than the scope-sheath gap formed between the endoscope catheter and the sheath tube, which means that when the tube bodies of the flushing catheter and the endoscope catheter are respectively located at the same position in the sheath tube cavity, the comparison can be that the tube-sheath gap is partially larger than the scope-sheath gap, or the tube-sheath gap is larger than the scope-sheath gap throughout the entire process; in one case, the flushing catheter that enters the sheath tube cavity during use is the same or approximately cylindrical as the endoscope catheter that enters the sheath tube cavity during use, but the average outer diameter of the flushing catheter body that enters the sheath tube cavity during use is smaller than the average outer diameter of the endoscope catheter body that enters the sheath tube cavity during use; in another case, the flushing catheter body that enters the sheath tube cavity during use is partially concave, and the maximum gap between the outer surface of the concave part of the flushing catheter and the inner surface of the sheath tube is larger than the maximum gap between the outer surface of the endoscope catheter and the inner surface of the sheath tube; it can also be that the flushing catheter that enters the sheath tube cavity during use is in other cases. The maximum gap between the outer surface of the flushing catheter in the lumen of the tube and the inner surface of the sheath is larger than the maximum gap between the outer surface of the endoscope catheter entering the lumen of the sheath during use and the inner surface of the sheath, so that when the top of the head of the endoscope catheter is withdrawn to the position of the outer opening of the sheath near the tail of the sheath, and the flushing catheter enters the renal pelvis through the lumen of the sheath, the broken stones in the renal pelvis are more easily sucked out of the body through the larger gap, namely the tube-sheath gap; and the endoscope-sheath gap between the endoscope catheter and the sheath is small, and the endoscope needs to be withdrawn in time when the water flow is not smooth or the gap is blocked by gravel or tissue fragments. There are usually dozens or even hundreds of endoscope withdrawal operations in one operation, which are cumbersome and time-consuming. The repeated advancement and retreat of the endoscopic catheter will also cause the sheath to swing frequently in the ureter, thereby damaging the urinary tract; only under the premise of providing a larger gap for gravel to pass through and ensuring that the fluid in the renal pelvis is replenished in time, can the broken stone fragments in the renal pelvis flow out of the body more effectively.
[0009] In order to ensure that the flushing catheter can inject fluid into the renal pelvis while absorbing the gravel in the renal pelvis and the tube-sheath gap, it also includes a suction lumen arranged on the flushing catheter body. The suction lumen is provided with an inner suction lumen opening that enters the body during use and an outer suction lumen opening located outside the body.
[0010] In order to reduce the space occupied by the flushing catheter and make the operating room tidier, it also includes a shell whose overall or partial contour is curved, including one or more shapes such as arc, snail, and disc. The shell connecting part is connected to the flushing side branch, and the flushing catheter located in the shell lumen enters the sheath tube lumen through the shell connecting part.
[0011] In order to save labor and realize automatic insertion of the flushing catheter, it also includes a motor, a gear, a rack and a rack groove that accommodates the rack, which are directly or indirectly connected to the shell; during operation, the motor drives the gear to rotate in place, and the gear drives the rack in the rack groove to move, thereby driving the flushing catheter to move in the inner cavity of the shell.
[0012] In order to flush away the gravel on the renal pelvic mucosa and flush the stones in the renal calyx into the renal pelvis, the head of the flushing catheter is covered with an expandable balloon, the opening in the flushing catheter is connected to the inner cavity fluid of the expandable balloon, and the expandable balloon is provided with a through hole connected to the outside.
[0013] Furthermore, in order to increase the tube-sheath gap, a closed or connected axial groove is provided on the flushing catheter.
[0014] In order to make the flushing catheter stick to the inner surface of the sheath and move, magnetic components that can attract each other are respectively arranged on the wall of the flushing catheter and the wall of the sheath. The magnetic components drive the flushing catheter located in the inner cavity of the sheath to stick to the inner surface of the sheath and move.
[0015] In order to offset the flushing catheter located in the sheath lumen and / or renal pelvis, the shell and the flushing side branch are connected by a deformable component including a membrane bag, a bellows, or an expanded shape that can displace the shell relative to the central axis of the flushing side branch.
[0016] In order to isolate the flushing catheter from the outside and prevent the external environment from contaminating the outer surface of the flushing catheter, an isolation body covering the flushing catheter is provided between the flushing catheter and the shell; the isolation body covers the flushing catheter, which means that it completely or at least partially accommodates the flushing catheter, especially the part of the flushing catheter that enters the inner cavity of the sheath during use; the isolation body isolates the flushing catheter located in the inner cavity of the sheath from the outside, preventing microorganisms, toxic foreign matter, etc. on the surface of the air and external objects from contacting the outer surface of the flushing catheter.
[0017] In order to prevent the gravel from blocking the tube-sheath gap, a vibrating component is also included. The vibrating component can act on the flushing catheter to make the gravel retained in the tube-sheath gap formed between the flushing catheter and the sheath tube easily flow out of the body with the fluid.
[0018] Furthermore, in order to more easily absorb the gravel located in the tube-sheath gap, an axial groove is provided on the flushing catheter, and a through hole arranged on the axial groove and communicating with the suction inner cavity serves as an opening in the suction inner cavity.
[0019] In order to realize the automated insertion of the flushing catheter more intelligently, a control module is also included. A sensor is arranged on the control module. When the identification band located at the head of the endoscope catheter retreats to the sensor identification area, the control module issues a position prompt and / or instruction to drive the flushing catheter into the sheath lumen via the flushing side branch.
[0020] In order to facilitate observation of the situation in the sheath cavity and / or renal pelvis, an auxiliary scope is also included which is used alone or as a covering for the sheath. When in use, the auxiliary scope reaches the area adjacent to the top of the flushing catheter head through the flushing catheter cavity or other cavities on the flushing catheter.
[0021] In order to facilitate the determination of the length of the flushing catheter protruding from the inner opening of the sheath, a scale mark is provided on the housing to indicate the length of the inner opening of the flushing catheter protruding from the inner cavity of the sheath.
[0022] The utility model can be used for various natural cavities such as the urinary tract, reproductive tract, nasal cavity, various third spaces and various surgical wounds.
[0023] The beneficial effects of the utility model are:
[0024] 1. Compared with the scope-sheath gap between the endoscope catheter and the sheath, the larger tube-sheath gap between the flushing catheter and the sheath is more conducive to the discharge of the gravel in the renal pelvis with the fluid, greatly reducing the probability of the tube-sheath gap being blocked.
[0025] 2. Compared with the operation of withdrawing the endoscopic catheter dozens or even hundreds of times during surgery, the use of the flushing catheter significantly reduces the number of withdrawals, saves surgical time, and avoids damage to the human body caused by the endoscopic catheter withdrawing from the sheath lumen.
[0026] 3. Compared with the working channel of the endoscopic catheter, the inner diameter of the flushing catheter is larger and the tube-sheath gap is also larger, achieving the purpose of large-flow perfusion and large-flow outflow, helping the stones to be effectively discharged from the body.
[0027] 4. The motor automatically controls the flushing catheter to enter and exit the sheath cavity, eliminating manual operation and shortening the operation time.
[0028] 5. The diameter of the irrigation catheter gradually decreases towards the top of its head, making it easier for stones to enter the tube-sheath gap.
[0029] 6. The expandable balloon at the head of the flushing catheter not only helps to flush out the gravel on the renal pelvic mucosa, but also can conform to the smaller opening of the renal calyx and flush the gravel in the renal calyx into the renal pelvis.
[0030] 7. A suction lumen is provided on the flushing catheter body, which ensures that an appropriate amount of external fluid is injected into the renal pelvis, while the gravel can not only flow out of the body through the tube-sheath gap, but also be adsorbed on the opening in the suction lumen and discharged from the body along with the flushing catheter.
[0031] 8. The flushing catheter is covered with an isolating body to protect the flushing catheter from contamination by the external environment.
[0032] 9. Magnetic components that can attract each other are locally set on the flushing catheter and the sheath tube, so that the flushing catheter can be attached to the inner wall of the sheath tube and move, providing a larger tube-sheath gap.
[0033] 10. When the vibrating component acts on the flushing catheter and / or sheath tube, it can make the gravel in the gap between the tube and the sheath easier to be discharged from the body, further avoiding the gravel blocking the gap between the tube and the sheath.
[0034] 11. A sensor for identifying the identification band on the endoscope catheter is set on the control module, which can assist in achieving the purpose of automatically inserting the flushing catheter. That is, as long as the sensor recognizes that the head of the endoscope catheter has retreated to the tail area of the sheath, the flushing catheter can be automatically inserted into the sheath cavity. This action is performed under program instructions, saving operation time, reducing manpower and saving costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0035] The accompanying drawings which do not limit the present invention are as follows:
[0036] Figure 1A : Example 1 Overall schematic diagram of traditional products
[0037] Figure 1B :Example 1 Cross-sectional view of a conventional product
[0038] Figure 1C : Example 1 Cross-sectional view of another state of a conventional product
[0039] Figure 1D : Example 1 A three-dimensional schematic diagram of the utility model
[0040] Figure 1E : Schematic diagram of embodiment 1 flushing catheter entering the renal pelvis
[0041] Figure 1F : A cross-sectional view of a cross section of Example 1
[0042] Figure 1G : Cross-sectional view of another section of Example 1
[0043] Figure 2A : Schematic diagram of a state of embodiment 2
[0044] Figure 2B : Schematic diagram of another state of embodiment 2
[0045] Figure 2C : Exploded view of part of the structure of Example 2
[0046] Figure 2D :A usage status diagram of Example 2
[0047] Figure 3A : A state diagram of implementation 3
[0048] Figure 3B : A structural diagram of Example 3
[0049] Figure 3C : Another structural diagram of embodiment 3
[0050] Figure 3D : Another state schematic diagram of Example 3
[0051] Figure 4A : A structural diagram of embodiment 4
[0052] Figure 4B : Another structural schematic diagram of embodiment 4
[0053] Figure 4C :A usage status diagram of Example 4
[0054] Figure 5 : Overall schematic diagram of Example 5
[0055] Fig. 6A : Overall schematic diagram of Example 6
[0056] Figure 6B : A structural stereoscopic diagram of Example 6
[0057] Figure 6C : A cross-sectional view of a structural part of Example 6
[0058] Fig.6D : Another structural cross-sectional view of Example 6
[0059] Fig. 6E : Partial structural cross-sectional view of Example 6
[0060] Fig. 7A : Schematic diagram of embodiment 7
[0061] Figure 7B : Another three-dimensional schematic diagram of embodiment 7
[0062] Figure 7C : A state cross-sectional view of Example 7
[0063] Fig.7D : Another state cross-sectional view of embodiment 7
[0064] Fig. 8A : A structural diagram of Example 8
[0065] Figure 8B : Another structural schematic diagram of Example 8
[0066] Fig. 9 : Schematic diagram of embodiment 9
[0067] Fig. 10A : A state diagram of embodiment 10
[0068] Fig. 10B : Another state schematic diagram of embodiment 10 DETAILED DESCRIPTION
[0069] The embodiments of the present invention are not limited to the following:
[0070] Embodiment 1:
[0071] like Figures 1A-1C As shown, an endoscopic catheter 1 and a sheath 3 for urinary stone surgery are provided. The slender endoscopic catheter 1 is provided with an optical component and at least one working channel 10 that runs through the head and tail. The working channel 10 is provided with an inner working channel opening 101 that enters the body when in use and an outer working channel opening 102 that is located outside the body (figure omitted). The main body of the endoscopic catheter 1 is composed of an endoscopic catheter head 11, an endoscopic catheter middle part 12 and an endoscopic catheter tail 13. The top 111 of the endoscopic catheter 1 head is provided with a lens 111a, an optical window 111b and a pressure and temperature two-in-one sensor 111c. The endoscopic catheter tail 13 is connected with a hollow operating handle 14. The operating handle channel (figure omitted) is connected with the working channel 10. The operating handle 14 is provided with a power supply interface 140 and a regulating body 141 for adjusting the bending direction and / or bending degree of a partial area of the endoscopic catheter head 11. The operating handle 14 is also provided with an optical fiber connected with the operating handle channel (figure omitted). The side branch 142 and the perfusion side branch 143, the optical fiber side branch 142 allows the lithotripsy optical fiber to enter the renal pelvis P from the working channel 10 to play its own function, and the perfusion side branch 143 allows external fluid to enter the renal pelvis P to play the role of flushing and heat dissipation; when in use, the sheath tube 3 with a sheath tube inner cavity 30 is sleeved outside the endoscope catheter 1, and the sheath tube 3 is provided with a sheath tube inner opening 301 entering the body when in use and a sheath tube outer opening 302 located outside the body, and the sheath tube 3 includes a sheath tube head 31, a sheath tube middle portion 32. The sheath tail 33 is provided with a negative pressure suction side branch 331 for connecting a negative pressure suction device (not shown) to suck the gravel S in the renal pelvis P out of the body. The negative pressure suction side branch 331 is provided with a negative pressure suction lumen 3310. In order to prevent the fluid from flowing out of the body through the gap between the endoscope catheter 1 and the sheath 3, a sealing ring C is provided at the end of the sheath tail 33. The endoscope catheter 1 passes through the sealing plug C and enters into the sheath lumen 30 through the sheath outer opening 302; Figure 1A It is shown that the tip 111 of the endoscope catheter 1 enters the renal pelvis P through the opening 301 in the sheath. Figure 1B The endoscope catheter 1 is shown to be retracted to the sheath tail 33, and the gravel S is sucked into the sheath lumen 30 by negative pressure. Figure 1C It is shown that the top end 111 of the head of the endoscope catheter 1 is withdrawn to the area near the tail end 33 of the sheath tube, and the gravel S flows out of the body through the negative pressure suction cavity 3310 connected to the inner cavity 30 of the sheath tube.
[0072] like Figure 1D-1G As shown, it also includes a flushing catheter 2 used in conjunction with the endoscope catheter 1 and the sheath 3. The flushing catheter 2 enters the sheath lumen 30 through the flushing side branch 34 of the sheath tail 33. The flushing side branch lumen 340 is connected to the sheath lumen 30. The flushing catheter 2 is provided with a flushing catheter lumen 20 and a flushing catheter inner opening 201 that enters the body when in use and a flushing catheter outer opening 202 that is located outside the body. The flushing catheter inner opening is located at the top 211 of the flushing catheter head, and the flushing catheter outer opening 202 is located at the end 231 of the flushing catheter tail. The flushing catheter 2 and the sheath 3 have a tube-sheath gap. The gap is larger than the scope-sheath gap between the endoscope catheter 1 and the sheath 3. When in use, when the top end 111 of the endoscope catheter 1 is withdrawn to the position of the sheath tail 33 adjacent to the outer opening 302 of the sheath, the flushing catheter 2 enters the sheath lumen 30 through the flushing side branch lumen 340; it also includes a shell 4 whose overall or partial contour is curved, including one or more shapes such as arc, snail, and disc, and the shell connection part 41 is connected to the flushing side branch 34. The flushing catheter 2 located in the shell lumen 40 enters the sheath lumen 30 through the shell connection part 41; it also includes a direct or indirect flushing The traction handle H fixedly connected to the tail 23 of the catheter pulls the flushing catheter 2 to move according to the set arc-shaped shell cavity 40, while making the flushing catheter 2 occupy a smaller space area. The traction handle H is connected to a hollow water inlet pipe H1, the bottom end of the water inlet pipe H1 is connected to the flushing catheter 2, and the water inlet pipe cavity H10 (not shown) is connected to the flushing catheter cavity 20. The water inlet pipe H1 can be connected to an independent hollow pipe 00. The external fluid enters the flushing catheter cavity 20 through the hollow pipe 00 and the top opening H101 of the water inlet pipe H1, and finally enters through the flushing catheter inner opening 201. In the body; the disc-shaped shell 4 is directly or indirectly connected to a hollow delivery arm 47, the delivery arm 47 is sealed and connected to the flushing side branch 34, and the portion where the delivery arm 47 is connected to the flushing side branch 34 constitutes the shell connection portion 41, and the flushing catheter 2 enters the flushing side branch lumen 340 through the delivery arm opening 470. In this example, the delivery arm 47 is partially placed in the flushing side branch lumen 340, and of course the delivery arm 47 can also partially cover the flushing side branch 34 to form a sealed connection; a scale mark D is also provided on the delivery arm 47 to indicate the length of the flushing catheter opening 201 protruding from the sheath lumen 30; Figure 1D The hollow delivery arm 47 is shown partially placed in the flushing side branch lumen 340 to form a sealed connection, and the top end 211 of the flushing catheter head protrudes out of the delivery arm opening 470 and enters the flushing side branch lumen 340; Figure 1EIt is shown that part of the flushing catheter 2 enters the body through the sheath lumen 30, the top end 211 of the flushing catheter head penetrates into the renal pelvis P through the opening 301 in the sheath, and the external fluid enters the renal pelvis P through the opening 201 in the flushing catheter. At this time, the middle part 22 of the flushing catheter is located in the sheath lumen 30, and the tail part 23 of the flushing catheter is located in the hollow delivery arm 47; the arrow in the figure represents the direction of fluid flow.
[0073] The above-mentioned conveying arm 47 is sealedly connected to the flushing side branch 34, and can be a rotatable axial fixed connection, that is, the axial position of the conveying arm 47 with the flushing side branch 34 remains unchanged when the conveying arm 47 rotates; the conveying arm 47 is directly or indirectly connected to the shell 4, and can be a hollow conveying arm 47 extending from the shell 4, or can be an independent component connected to the shell that extends from the hollow conveying arm 47.
[0074] like Figure 1E , 1F As shown, in this embodiment, the shell 4 is partially disc-shaped and also includes a receiving body 24 partially located in the shell cavity 40 for accommodating the flushing catheter 2. The receiving body 24 is composed of a left receiving portion 24a and a right receiving portion 24b. The flushing catheter 2 is partially located in a curved arc receiving cavity 240 formed by the left receiving portion 24a and the right receiving portion 24b. The receiving body 24 and the shell 4 maintain a relative position and do not move. At this time, the shell cavity 40 is partially or completely occupied by the receiving body 24. The upper opening formed by the left receiving portion 24a and the right receiving portion 24b being conformably placed in the shell cavity 40 forms a guide notch 42. The traction handle H is connected to the flushing catheter 2 through the guide notch 42. When in use, the traction handle H drives the flushing catheter 2 to the left receiving portion 24. a and the right receiving part 24b together form a receiving cavity 240 for guiding movement. The receiving body 24 and the flushing catheter 2 can be used as an integrated consumable. When the flushing catheter 2 needs to be replaced, the receiving body 24 and the flushing catheter 2 can be taken out from the shell cavity 40 at the same time, and the replacement operation is convenient and labor-saving. Of course, the receiving body 24 can also be omitted, and a conformable guiding notch 42 can be set on the surface of the shell 4, and the guiding notch 42 is connected with the shell cavity 40. The flushing catheter 2 is directly located in the shell cavity 40, and the traction handle H drives the flushing catheter 2 to move along the guiding notch 42, or the receiving body 24 and the shell 4 are integrally formed, and the receiving cavity 240 becomes the shell cavity 40, or the receiving body 24 is fixedly connected to the shell 4 and cannot be taken out and replaced together with the flushing catheter 2.
[0075] like Figure 1GA sectional view of the shell 4 at another section is shown, from which it can be seen that the end of the flushing catheter tail portion 23 is fixedly connected to the traction handle H, and the outer opening 202 of the flushing catheter is not blocked by the sealing plug 2021. At this time, medical equipment such as a guide wire can enter the flushing inner cavity 20 through the outer opening 202 of the flushing catheter (not shown). If it is necessary to inject fluid into the flushing catheter inner cavity 20 through the top opening H101 of the water inlet pipe H1, the outer opening 202 of the flushing catheter can be sealed and blocked with the sealing plug 2021.
[0076] The above-mentioned tube-sheath gap formed between the flushing catheter 2 and the sheath tube 3 is larger than the scope-sheath gap formed between the endoscope catheter 1 and the sheath tube 3 when the flushing catheter 2 and the endoscope catheter 1 respectively enter the sheath tube lumen 30, which means that the comparison is made when the tube bodies of the flushing catheter 2 and the endoscope catheter 1 are respectively located at the same positions in the sheath tube lumen, and the tube-sheath gap may be partially larger than the scope-sheath gap, or the tube-sheath gap may be larger than the scope-sheath gap throughout the entire process; one situation is that the flushing catheter 2 entering the sheath tube lumen 30 when in use and the endoscope catheter 1 entering the sheath tube lumen 30 when in use are the same or approximately cylindrical, but the average outer diameter of the tube body of the flushing catheter 2 entering the sheath tube lumen 30 when in use is smaller than the average outer diameter of the tube body of the endoscope catheter 1 entering the sheath tube lumen 30 when in use; another situation is that the tube body of the flushing catheter 2 entering the sheath tube lumen 30 when in use is partially concave, and the maximum gap between the outer surface of the concave part of the flushing catheter 2 and the inner surface of the sheath tube 3 is larger than the maximum gap between the outer surface of the endoscope catheter 1 and the inner surface of the sheath tube 3; it may also be In other cases, the maximum gap between the outer surface of the flushing catheter 2 entering the sheath tube lumen 30 and the inner surface of the sheath tube 3 is larger than the maximum gap between the outer surface of the endoscope catheter 1 entering the sheath tube lumen 30 and the inner surface of the sheath tube 3, so that when the top end 111 of the endoscope catheter 1 is withdrawn to the position of the sheath tube tail 33 adjacent to the outer opening 302 of the sheath tube, and the flushing catheter 2 enters the renal pelvis P through the sheath tube lumen 30, the broken stones in the renal pelvis P are more easily sucked out through the larger gap, that is, the tube-sheath gap. to the outside of the body; and the scope-sheath gap between the endoscope catheter 1 and the sheath 3 is small, and the endoscope needs to be withdrawn in time when the water flow is not smooth or the gap is blocked by gravel or tissue fragments. There are usually dozens or even hundreds of endoscope withdrawal operations in one operation, which is cumbersome and time-consuming. The repeated advancement and withdrawal of the endoscope catheter 1 will also cause the sheath 3 to swing frequently in the ureter, thereby damaging the urinary tract; when a larger gap is provided for the passage of gravel and the fluid in the renal pelvis P is ensured to be replenished in time, the broken stones in the renal pelvis P can flow out of the body more effectively.
[0077] Embodiment 2:
[0078] like Figures 2A-2CAs shown, different from the above-mentioned embodiment, it also includes a motor 43, a gear 44, a rack 45 and a rack groove 46 that accommodates the rack 45, which are directly or indirectly connected to the shell 4. The tail 23 of the flushing catheter is connected with a bridge body B, and the bridge body B is fixedly connected to the rack 45 in the rack groove 46. The water inlet pipe H1 passes through the bridge body B and is connected to the flushing catheter 2. The water inlet pipe cavity H10 is connected to the flushing catheter cavity 20 (figure omitted); the motor 43 can be powered by a battery (figure omitted) or an external power supply. The motor 43 is connected to a control circuit (figure omitted) and can be controlled by wired and / or wireless signals. When the motor 43 receives the instruction, it drives the gear 44 to rotate in place when it is running, and the gear 44 drives the rack 45 in the rack groove 46 to move, thereby driving the bridge body B and the flushing catheter 2 fixedly connected thereto to be linked, so that the flushing catheter 2 extends from the hollow delivery arm 47 and then enters the sheath cavity 30. When the motor 43 reverses, the flushing catheter 2 is retracted; Figure 2A The irrigation catheter head 21 is shown to be located in the irrigation side branch lumen 340; Figure 2B The motor 2 rotates to drive the gear, the bridge body B and the irrigation catheter 2 to move, and the top 211 of the head of the irrigation catheter 2 protrudes out of the opening 301 in the sheath; Figure 2C As shown, the rack groove 46 is located in the housing 4, and the rack groove 46 is connected to the housing inner cavity 40 accommodating the receiving body 24 through the annular secondary guide notch 421. The lower part B1 of the bridge body is embedded in the assembly groove 451 on the rack 45 through the secondary guide notch 421, and the lower part B1 of the bridge body moves along the secondary guide notch 421. Figure 2C-1 4 is a cross-sectional view of another cross section of the rack 45 and the rack groove 46 so as to show the positional relationship between the rack 45 and the rack groove 46.
[0079] like Figure 2D As shown, the outer opening 202 of the flushing catheter is not blocked, and the guide wire G enters the flushing lumen 20 through the outer opening 202 of the flushing catheter (figure omitted); in one case, the motor is not running at this time, and the guide wire G is controlled to enter the sheath tube lumen 30 through the flushing lumen 20, and then enter the body through the sheath tube inner opening 301; in another case, the motor 43 drives the gear 44 to rotate, driving the flushing catheter 2 and the guide wire G located therein to move, and when the top end 211 of the head of the flushing catheter 2 protrudes from the sheath tube lumen 30, the guide wire G is controlled to enter the body through the flushing catheter inner opening 201 (figure omitted).
[0080] Embodiment 3:
[0081] like Figures 3A-3D As shown, different from the above-mentioned embodiment, this embodiment introduces several other structural designs of the flushing catheter 2. Figure 3AIt is shown that magnetic components M that can attract each other are respectively arranged on the wall of the flushing catheter 2 and the wall of the sheath tube 3. The magnetic component M drives the flushing catheter 2 located in the inner cavity 30 of the sheath tube to adhere to the inner wall of the sheath tube 3 and move. After the outer wall of the flushing catheter 2 adheres to the inner wall of the sheath tube 3, the maximum tube-sheath gap between the flushing catheter 2 and the sheath tube 3 is larger than before the wall is not attached, and the gravel S is more likely to flow out through the larger tube-sheath gap. The magnetic component M can be set on the flushing catheter 2 and the sheath tube 3 throughout, or it can be set locally; Figure 3B The outer diameter of the flushing catheter head 21 is gradually reduced until it reaches the minimum at the top 211 of the head, and the top 211 of the flushing catheter head is closed to the outside. The flushing catheter head 21 is provided with a plurality of flushing catheter inner openings 201, and the flushing catheter inner openings 201 are connected with the flushing catheter inner cavity 20 (not shown), and the fluid in the flushing catheter inner cavity 20 can enter the renal pelvis through the plurality of flushing catheter inner openings 201; Figure 3C The outer diameter of the flushing catheter head 21 is almost the same, but the top 211 of the flushing catheter head 2 is closed to the outside, and the fluid in the flushing catheter lumen 20 (not shown) enters the renal pelvis through the multiple flushing catheter inner openings 201 provided in the flushing catheter head 21; Figure 3D The flushing catheter head 21 is shown to be covered with an expandable bladder 211a, and the flushing catheter inner opening 201 (not shown) is located in the expandable bladder inner cavity 2111. The expandable bladder 211a is provided with a through hole 2110 connected to the outside. The expandable bladder inner cavity 2111 is connected to the flushing catheter inner cavity 20 (not shown) through the flushing catheter inner opening 201 (not shown). The fluid in the flushing catheter inner cavity 20 eventually enters the renal pelvis P through the through hole 2110 on the expandable bladder 211a. Since the cross-sectional area of the through hole 2110 is smaller than the flushing catheter inner opening 201, When the fluid enters the expandable bladder cavity 2111 through the opening 201 in the flushing catheter, the expandable bladder 211a is first expanded and then flows out from the through hole 2110. At this time, the expanded expandable bladder 211a is closer to the mucosa in the renal pelvis, and the fluid flow rate is greater than when it flows directly from the opening 201 in the flushing catheter with a larger diameter. The fluid can wash away the small stones on the mucosa. Furthermore, the expanded expandable bladder 211a can conform to the shape and penetrate into the renal calyx P0, flushing the small stones in the renal calyx P0 into the renal pelvis P, and then flowing out of the body with the fluid. Figure 3D -1 shows the state of the expandable bladder 211a when it is not expanded or slightly expanded, Figure 3D -2 shows a state where the expandable bladder 211a is greatly expanded.
[0082] Embodiment 4:
[0083] like Figure 4A , 4BAs shown, different from the above-mentioned embodiment, the housing 4 is connected to the flushing side branch 34 through a deformable component T including a membrane bag, a bellows, or an expanded shape, which can make the housing 4 displace relative to the central axis L of the flushing side branch 34; Figure 4A The head 21 of the middle flushing catheter is located in the flushing side branch lumen 340, and the flushing side branch 34 is connected to the shell connecting portion 41 extending from the shell 4 through a thin-walled bellows-shaped deformable component T. The flushing catheter 2 enters the flushing side branch lumen 340 through the deformable component lumen T0. In order to facilitate manufacturing, installation and sealing connection, it also includes a first sealing body T1 and a second sealing body T2. The front end T3 of the deformable component is sealed with the flushing side branch 34 through the first sealing body T1, and the rear end T4 of the deformable component is sealed with the shell connecting portion 41 through the second sealing body T2. Sealed connection, during installation, the first sealing body T1 and the second sealing body T2 can be fixed on the deformable component T respectively, and then connected to the shell connection part 41 and the flushing side branch 34 respectively. Of course, the first sealing body T1, the second sealing body T2 and the deformable component T are integrally formed and manufactured; when the shell 4 is swung by external force, the thin-walled corrugated tube-shaped deformable component T between the flushing side branch 34 and the shell connection part 41 will also undergo deformations such as stretching, compression, and torsion, thereby driving the top 211 of the head of the flushing catheter 2 to displace and change the flushing direction; Figure 4B The middle flushing side branch 34 is connected to the shell connecting portion 41 extending from the shell 4 through a membrane bag-shaped deformable component T. Similarly, the flushing catheter head 21 enters the flushing side branch lumen 340 through the deformable component lumen T0, the front end T3 of the deformable component is sealed to the flushing side branch 34 through the first sealing body T1, and the rear end T4 of the deformable component is sealed to the shell connecting portion 41 through the second sealing body T2.
[0084] like Figure 4C As shown, in order to isolate the flushing catheter 2 from the outside and prevent microorganisms, toxic foreign matter, etc. in the air and the surface of external objects in the environment from contacting the outer surface of the flushing catheter 2, a thin-walled corrugated tube-shaped isolation body 5 covering the flushing catheter 2 is provided between the flushing catheter 2 and the shell 4. The flushing catheter 2 is located in the isolation body inner cavity 50, and the isolation body 5 is located in the shell inner cavity 40. When the motor 43 drives the gear 44 to rotate, the flushing catheter 2 moves in the shell inner cavity 40, and the corrugated tube-shaped isolation body 5 is compressed. When the motor 43 reverses, the flushing catheter 2 retreats to the shell inner cavity 40, and the bellows is in a stretched state. Of course, the isolation body 5 can also be other easily deformed shapes such as a membrane bag.
[0085] Embodiment 5:
[0086] like Figure 5As shown, different from the above-mentioned embodiment, it also includes a control module 6, and a sensor 61 is arranged on the control module 6. When the identification band 112 located at the endoscope catheter head 11 retreats to the identification area of the sensor 61, the control module 6 issues a position prompt and / or an instruction to drive the flushing catheter 2 to enter the sheath lumen 30 via the flushing side branch 34; in this figure, the identification band 112 is located near the top 111 of the head of the endoscope catheter 1, and the identification band 112 can be a cursor or other target that can be identified by an optical sensor. The sensor 61 can be an optical sensor to accurately locate the position of the identification band 112. In this figure, the sensor 61 is opposite to the position of the sheath tail 33 near the sheath outer opening 302. When the identification band 112 at the top 111 of the head of the endoscope catheter 1 retreats to the sheath outer opening 302 area and is identified by the sensor 61, the control module 6 issues an instruction to drive the flushing catheter 2 located at the flushing side branch lumen 340 to enter the sheath lumen 30. At this time, an indication or prompt icon may appear on the display screen 62 on the control module 6, and the control module 6 may also issue a voice instruction to remind the user.
[0087] In order to make it easy for gravel retained in the tube-sheath gap formed between the flushing catheter 2 and the sheath tube 3 to flow out of the body with the fluid and avoid blocking the tube-sheath gap, a vibrating component 66 is also included. The vibrating component 66 can act on the flushing catheter 2 to make it produce micro-vibration. In order to ensure the stability of the shell 4 during vibration, a support frame 64 supporting the delivery arm 47 of the shell 4 located on the control module 6 is also included. In order to avoid vibration wear on the outer surface of the flushing catheter 2 and to ensure that the vibration area of the flushing catheter 2 is isolated from the outside, the area in contact with the vibrating component 66 of the flushing catheter 2 in this figure is isolated by a soft membrane 65, and the two sides of the soft membrane 65 are respectively connected to the flushing side branch 34 and the delivery arm 47. When the power button 63 located on the control module 6 is started, the vibrating component 66 starts to work to vibrate the flushing catheter 2 located in the soft membrane cavity 650, and then the flushing catheter 2 located in the sheath cavity 30 produces micro-vibration, so that the gravel in the tube-sheath gap between the flushing catheter 2 and the sheath tube 3 is discharged from the body through the negative pressure suction cavity 3310 along with the fluid.
[0088] Embodiment 6:
[0089] like Figures 6A-6EAs shown, it also includes a suction cavity 25 arranged on the flushing catheter 2 tube body, and the suction cavity 25 is provided with a suction cavity inner opening 251 that enters the body when in use and a suction cavity outer opening 252 located outside the body. In this embodiment, multiple suction cavities 25 are arranged on the flushing catheter 2 tube body, and the suction cavity 25 and the flushing catheter cavity 20 are not connected to each other. The flushing catheter tail 23 is connected to the hollow tail component 232, and the flushing catheter cavity 20 is connected to the tail component channel 2320. The external fluid can enter the flushing catheter cavity 20 through the tail component channel 2320 and finally enter the renal pelvis P. The flushing catheter tail 23 is also connected to a hollow tube component 26, one end of the tube component 26 is sealedly connected to the flushing catheter tail 23, and the other end is sealedly connected to the tail component 232. The tube component 26 extends a suction side branch 261, and the suction side branch cavity 2610 is connected to the suction cavity 25 through the suction cavity outer opening 252 ( Fig. 6E ), when the external negative pressure device draws negative pressure through the suction side branch lumen 2610 and the suction lumen 25, the small gravel S in the renal pelvis P and the sheath lumen 30 can be adsorbed on the opening 251 in the suction lumen, and then discharged from the body along with the flushing catheter 2; of course, the tail component 232 and the tube component 26 can be integrally formed and manufactured, and then sealed and connected to the flushing catheter tail 23, or the flushing catheter tail 23 can directly extend a suction side branch connected to the suction lumen 25.
[0090] Fig. 6A , 6B 6C, the head 21 of the flushing catheter is connected to a head component 212 with a gradually reduced outer diameter, and the head component 212 is fixedly connected to the top 211 of the head of the flushing catheter 2 (not shown), and the outer diameter of the head component 212 is gradually reduced to facilitate entering the renal pelvis P through the sheath tube lumen 30. The top 2121 of the head component is closed to the outside, and the head component 212 is circumferentially provided with a plurality of head component openings 2120 connected with the flushing catheter lumen 20. The fluid in the flushing catheter lumen 20 can enter the head component lumen 2122 through the flushing catheter opening 201, and then enter the renal pelvis P through the head component opening 2120. The top opening 253 of the suction lumen 25 on the flushing catheter 2 body is closed so that it cannot communicate with the flushing catheter lumen 20. A plurality of suction lumen openings 251 are provided on the side of the suction lumen 25 and the side of the flushing catheter 2 body, so as to attract the gravel S in the renal pelvis P and in the tube-sheath gap between the flushing catheter 2 and the sheath 3. Of course, the head component 212 can also be integrally formed with the flushing catheter 2; Fig.6D The outer diameter of the middle head component 212 gradually decreases, but the top 2121 of the head component is open to the outside to form a head component opening 2120, that is, the head component opening 2120 is not only arranged around the head component 212, but also arranged at the top thereof; Fig. 6EThe tail component 232 and the tube component 26 are mainly shown. It can be seen that the flushing catheter lumen 20 is connected with the tail component channel 2320 through the flushing catheter outer opening 202 so that the fluid in the external flushing device (not shown) can enter the flushing catheter lumen 20, and the suction lumen 25 is connected with the suction side branch lumen 2610 through the suction lumen outer opening 252 so that the negative pressure in the external negative pressure device (not shown) can enter the suction lumen 25.
[0091] Embodiment 7:
[0092] like Figure 7A-7B As shown, the flushing catheter 2 is provided with a closed or connected axial groove G, and in this embodiment, the flushing catheter 2 is provided with a connected axial groove G, and a through hole partially provided on the axial groove G and connected with the suction inner cavity 25 serves as an opening 251 in the suction inner cavity. The axial groove G increases the tube-sheath gap formed between the flushing catheter 2 and the sheath tube 3 while keeping the maximum outer diameter unchanged; Fig. 7A It is shown that the top 211 of the head of the irrigation catheter 2 is directly closed to the outside and the outer diameter gradually decreases toward the top 211 of the head, so that the gravel S can enter the tube-sheath gap more easily. The suction lumen 25 releases negative pressure to attract the gravel through multiple suction lumen openings 251 on the axial groove. The flushing catheter openings 201 are circumferentially arranged on the flushing catheter head 21. Figure 7B It is shown that the flushing catheter 2 is located in the sheath lumen 30, and the gravel S entering the tube-sheath gap is adsorbed at the suction lumen opening 251 at the axial groove G under the negative pressure suction of an external negative pressure device (not shown), and is finally taken out of the body with the flushing catheter 2.
[0093] like Figure 7C , 7D As shown, the flushing catheter 2 with a suction inner cavity 25 is fixedly connected to the flushing catheter head 21 with a head component 212 with a gradually reduced outer diameter, the top 2121 of the head component is closed to the outside, and the head component 212 is circumferentially provided with a plurality of head component openings 2120 communicating with the flushing catheter inner cavity 20, the flushing catheter head 21 is covered with an expandable sac 211a, the head component openings 2120 are located in the expandable sac 211a, the expandable sac 211a is provided with a through hole 2110 communicating with the outside, and the expandable sac inner cavity 2111 is provided with a through hole 2110 communicating with the outside. The flushing catheter inner opening 201 is connected with the flushing catheter inner cavity 20. Of course, the head component 212 and the flushing catheter head 21 can also be configured to be the same component. The head component opening 2120 is the flushing catheter inner opening 201. After the expandable bladder 211a is filled with fluid, it can be conformably expanded in the renal pelvis to flush away the gravel adhered to the renal pelvic mucosa, and can also be probed into the renal calyx to flush the gravel in the renal calyx into the renal pelvis. The gravel eventually flows out of the body through the tube-sheath gap with the fluid or is adsorbed on the suction inner cavity opening 251 and discharged from the body. Figure 7CThe expandable bladder 211a is in an unexpanded state, and the inner cavity 2111 of the expandable bladder has not yet been filled with fluid. Fig.7D The expandable bladder 211a is in an expanded state, and the inner cavity 2111 of the expandable bladder is filled with fluid.
[0094] Embodiment 8:
[0095] like Fig. 8A , 8B As shown, it also includes an auxiliary mirror 213 used alone or covering the sheath 27. When in use, the auxiliary mirror 213 reaches the vicinity of the top 211 of the irrigation catheter head through the inner cavity 20 of the irrigation catheter or other cavities on the irrigation catheter 2; Fig. 8A The flushing catheter 2 is shown to be located in the sheath tube lumen 30, and the flushing catheter 2 is provided with a hollow flushing catheter lumen 20. The flushing catheter 2 is also provided with a hollow auxiliary mirror channel 28, and the top opening 280 of the auxiliary mirror channel is closed by a film-like or hard shell-like transparent member 281. When in use, the auxiliary mirror 213 enters the auxiliary mirror channel 28, and the auxiliary mirror lens 2130 observes the state of the sheath tube lumen 30 and / or the renal pelvis through the transparent member 281. Because the auxiliary mirror 213 is located in the auxiliary mirror channel 28 that is not contaminated by fluids, etc., the auxiliary mirror 213 can be reused, saving costs; Figure 8B The flushing catheter 2 is shown to be located in the sheath lumen 30. The flushing catheter 2 is provided with a hollow flushing catheter lumen 20. The auxiliary mirror 213 enters the flushing catheter lumen 20 after covering the sleeve 27. At least the top area 271 of the sleeve 27 adjacent to the auxiliary mirror lens 2130 is transparent. After the auxiliary mirror lens 2130 is fully or partially protruded from the opening 201 in the flushing catheter, it is convenient to observe the situation in the renal pelvis and guide subsequent operations. The auxiliary mirror covering the sleeve 27 is reusable, and the sleeve 27 can be hard tubular or soft membrane-shaped. The arrow in the figure indicates the direction of fluid flow.
[0096] Embodiment 9:
[0097] like Fig. 9As shown, the top end 111 of the head of the endoscope catheter 1 is withdrawn to the area near the outer opening 302 of the sheath tube, and the flushing catheter 2 with a suction lumen 25 (not shown) on the tube body partially enters the sheath tube lumen 30, and the flushing catheter inner opening 201 protrudes out of the sheath tube inner opening 301. The suction lumen inner opening 251 on the flushing catheter 2 is circumferentially arranged on the flushing catheter head 21, and the suction lumen inner opening 251 partially protrudes out of the sheath tube inner opening 301; it also includes a shell 4 and a motor 43, a gear 44, and a rack 45 connected thereto. The flushing catheter tail 23 is connected to the rack 45 through a bridge body B, and the motor 43 drives the gear 44 to rotate in place, and the gear 44 drives the rack 45 to move, thereby driving the flushing The catheter 2 moves. The state in this figure is that the tail portion 23 of the flushing catheter is located near the delivery arm 47 extending from the shell 4, and the head portion 21 of the flushing catheter partially protrudes from the opening 301 in the sheath tube; in order to inject fluid through the flushing catheter lumen 20 (figure omitted), it also includes a water inlet pipe H1 that passes through the bridge body B and is connected to the flushing catheter lumen 20 (figure omitted); in order to absorb gravel through the suction lumen opening 251 of the suction lumen 25 (figure omitted), it also includes a negative pressure tube H2 that can be connected to an external negative pressure suction device, and the negative pressure tube lumen H20 is connected to the suction lumen 25 (figure omitted), and the negative pressure released by the negative pressure suction device enters the suction lumen 25 (figure omitted) through the negative pressure tube lumen H20.
[0098] Embodiment 10:
[0099] like Fig. 10A , 10B As shown, the sheath tail 33 is connected with a sealing plug C, and the sheath tail 33 is also indirectly connected with a hollow endoscope catheter side branch 35 and a hollow flushing side branch 34. The endoscope catheter side branch upper portion 351 and the flushing side branch upper portion 341 pass through the sealing ring C and enter the sheath lumen 30. The endoscope catheter 1 enters the sheath lumen 30 through the endoscope catheter side branch 35. Fig. 10A The top end 111 of the endoscope catheter 1 passes through the endoscope catheter side branch 35 and is located near the outer opening 302 of the sheath tube. The flushing catheter 2 passes through the flushing side branch 34 and enters the inner cavity 30 of the sheath tube. The top end 211 of the flushing catheter 2 protrudes out of the inner opening 301 of the sheath tube. Fig. 10B The flushing catheter 2 is shown to have exited the sheath lumen 30, but the top end 111 of the head of the endoscopic catheter 1 is still located in the sheath lumen 30. When in use, the flushing catheter 2 can enter the flushing side branch lumen 340 through the flushing side branch opening 3401, and then enter the sheath lumen 30. The delivery arm 47 extending from the shell 4 can be directly connected to the flushing side branch 34, or can be connected to the flushing side branch 34 through a hollow connecting tube.
[0100] The medical flushing catheter of the utility model can also be used for medical operations in various natural cavities including cardiovascular, respiratory, lacrimal, ear, reproductive and digestive tracts or in third spaces such as the chest and abdominal cavities of living bodies, and can also be used for medical operations on penetrating wounds, pathological sinuses and the like.
Claims
1. A medical flushing catheter, wherein the flushing catheter (2) is used in conjunction with an endoscope catheter (1) and a sheath tube (3); the elongated endoscope catheter (1) is provided with an optical component and at least one working channel (10) running through the head and tail, the working channel (10) being provided with an inner working channel opening (101) for entering the body when in use and an outer working channel opening (102) located outside the body; the sheath tube (3) is sleeved outside the endoscope catheter (1), the sheath tube (3) being provided with an inner sheath tube opening (301) for entering the body when in use and an outer sheath tube opening (302) located outside the body, the flushing catheter (2) entering the sheath tube lumen (30) through a flushing side branch (34) at the tail of the sheath tube (33), the flushing catheter (2) being provided with an inner flushing catheter lumen (20) and an inner flushing catheter opening (201) for entering the body when in use and an outer flushing catheter opening (202) located outside the body, characterized in that: When the flushing catheter (2) and the endoscope catheter (1) respectively enter the sheath lumen (30), the tube-sheath gap formed between the flushing catheter (2) and the sheath (3) is larger than the mirror-sheath gap formed between the endoscope catheter (1) and the sheath (3). When in use, when the top end (111) of the endoscope catheter head is withdrawn to a position adjacent to the sheath tail (33) and the outer opening (302) of the sheath, the flushing catheter (2) enters the sheath lumen (30) via the flushing side branch (34). The flushing catheter (2) works in a non-visual state or cooperates with an auxiliary mirror (213). The auxiliary mirror (213) reaches the adjacent area of the top end (211) of the flushing catheter head via the flushing catheter lumen (20) or other cavities on the flushing catheter (2). The auxiliary mirror (213) is used alone or covered with a sheath (27).
2. A medical flushing catheter according to claim 1, characterized in that: It also includes a shell (4) whose overall or partial contour is curved and is composed of one or more shapes including arc-shaped, snail-shaped, and disc-shaped. The hollow shell connecting portion (41) is connected to the flushing side branch (34). The flushing catheter (2) located in the shell inner cavity (40) enters the sheath tube inner cavity (30) through the shell connecting portion (41); the length of the shell inner cavity (40) matches that of the flushing catheter (2) and / or a scale mark (D) is provided on the shell (4) to indicate the length of the opening (201) in the flushing catheter protruding out of the sheath tube inner cavity (30).
3. A medical flushing catheter according to claim 2, characterized in that: It also includes a motor (43), a gear (44), a rack (45) and a rack groove (46) that are directly or indirectly connected to the housing (4); during operation, the motor (43) drives the gear (44) to rotate in place, and the gear (44) drives the rack (45) in the rack groove (46) to move, thereby driving the flushing catheter (2) to move in the housing cavity (40); the motor (43) is connected to a manual switch or is controlled by a control module (6), and a sensor (61) is provided on the control module (6). When the identification band (112) located at the endoscope catheter head (11) retreats to the identification area of the sensor (61), the control module (6) issues a position prompt and / or command to drive the flushing catheter (2) to enter the sheath cavity (30) via the flushing side branch (34).
4. A medical flushing catheter according to claim 1, characterized in that: The head (21) of the flushing catheter is coated with an expandable sac (211a), the opening (201) in the flushing catheter is in fluid communication with the inner cavity (2111) of the expandable sac, and the expandable sac (211a) is provided with a through hole (2110) that is in communication with the outside.
5. A medical flushing catheter according to claim 1, characterized in that: An axial groove (G) is provided on the flushing catheter (2) and / or the flushing catheter head (21) is connected to a head component (212) with a gradually decreasing outer diameter.
6. A medical flushing catheter according to claim 1, characterized in that: Magnetic components (M) that can attract each other are respectively arranged on the wall of the flushing catheter (2) and the wall of the sheath tube (3), and the magnetic components (M) drive the flushing catheter (2) located in the inner cavity (30) of the sheath tube to adhere to the inner surface of the sheath tube (3) and move.
7. A medical flushing catheter according to any one of claims 2-3, characterized in that: The shell (4) and the flushing side branch (34) are connected via a deformable component (T) including a membrane bag, a bellows, or an expanded shape, which can cause the shell (4) to be displaced relative to the central axis direction of the flushing side branch (34).
8. A medical flushing catheter according to any one of claims 2-3, characterized in that: An isolation body (5) covering the flushing catheter (2) is provided between the flushing catheter (2) and the housing (4).
9. A medical flushing catheter according to any one of claims 2-3, characterized in that: It also includes a vibrating component (66), which can act on the flushing catheter (2) and / or the sheath tube (3) to make it easier for the gravel retained in the tube-sheath gap formed between the flushing catheter (2) and the sheath tube (3) to flow out of the body along with the fluid.
10. A medical flushing catheter according to any one of claims 1 to 6, characterized in that: It also includes a suction lumen (25) disposed on the body of the flushing catheter (2), the suction lumen (25) being provided with a suction lumen inner opening (251) that enters the body during use and a suction lumen outer opening (252) that is located outside the body, the suction lumen inner opening (251) being provided on the surface of the flushing catheter (2) or in an axial groove (G) on the flushing catheter (2).