Fallopian tube angiographic catheter

Abstract

The utility model relates to an oviduct angiographic catheter. The fallopian tube liquid injection device comprises an installation head, one end of the installation head is fixedly connected with an outer catheter, a liquid injection head is fixedly connected into the installation head, one end, close to the outer catheter, of the liquid injection head is fixedly connected with an inner catheter, and the inner catheter penetrates through the outer catheter. Then an external inflator is used for inflating through an inflation head, so that inflation of the balloon is achieved, the balloon expands after inflation is completed, the fallopian tube is sealed, contrast agents are prevented from flowing out of the uterus, then a rotary knob is rotated, the rotary knob drives a threaded rod to rotate during rotation, the threaded rod drives a rubber pressing plate to move downwards in the rotation process, and the rubber pressing plate is driven to move downwards during rotation. And the inflation tube is sealed after being extruded, so that airflow in the balloon is prevented from flowing back from the inflation tube, and the balloon is ensured to have a good sealing effect on the fallopian tube.

Description

Technical Field

[0001] The utility model relates to the technical field of contrast detection, in particular to a fallopian tube contrast catheter. Background Art

[0002] Hysterosalpingography is a method used to check whether the fallopian tubes of women are unobstructed. It is one of the most widely used methods in clinical practice. Hysterosalpingography is an X-ray hysterosalpingography. Contrast agents are injected into the uterine cavity and fallopian tubes through a catheter. X-ray fluoroscopy and radiography are performed using an X-ray diagnostic device. The appearance of the contrast agents in the fallopian tubes and pelvic cavity is used to understand whether the fallopian tubes are unobstructed, the site of obstruction and the morphology of the uterine cavity.

[0003] During the examination, it is necessary to inject contrast agent into the uterine cavity through a contrast catheter. For example, a Chinese patent with the announcement number CN206924242U discloses a hysterosalpingography catheter, including a tube body, a filling chamber and a drug injection chamber are provided on one side of the tube body, and the tube body, the filling chamber and the drug injection chamber are connected; a Robert clamp is provided on the drug injection chamber, and a joint is provided at the end of the drug injection chamber; a valve is provided on the filling chamber, and a balloon inflator is provided at the end of the filling chamber; a guide head is provided at the other end of the tube body; a balloon and a drug outlet are provided on the tube body; a temperature sensing probe is provided on one side of the drug outlet, and the temperature sensing probe extends to the inside of the guide head; the utility model has a simple structure, is easy to manufacture and has low cost, and avoids the problem of false positives.

[0004] The common angiography catheter in the current prior art is fixedly connected to a Robert clamp outside the injection cavity. The Robert clamp is mainly used to close the main cavity to prevent the contrast agent in the injection cavity from flowing back. However, although the Robert clamp has excellent elasticity and toughness, its clamping strength cannot be maintained after long-term use, resulting in the contrast agent in the injection cavity flowing back, affecting the angiography effect. Summary of the invention

[0005] Therefore, the technical problem to be solved by the utility model is to overcome the problem in the prior art that the clamping force of the Robert clamp cannot be maintained after long-term use, resulting in the backflow of the contrast agent in the injection cavity.

[0006] In order to solve the above technical problems, the utility model provides a salpingography catheter, comprising a mounting head, one end of the mounting head is fixedly connected to an outer catheter, an injection head is fixedly connected inside the mounting head, an end of the injection head close to the outer catheter is fixedly connected to the inner catheter, the inner catheter penetrates the outer catheter, an end of the mounting head close to the outer catheter and located outside the outer catheter is fixedly connected to a connecting plate, two groups of mounting grooves are provided on a side of the connecting plate away from the mounting head, mounting blocks are slidably connected in the two groups of mounting grooves, each of the mounting blocks is fixedly connected to a fixing block on a side away from the mounting head, each of the fixing blocks is fixedly connected to an extrusion block at one end away from the outer catheter, and the extrusion block is arranged in a circular ring shape at one end, a balloon is fixedly connected to one end of the outer catheter away from the mounting head, an inflation component is arranged outside the outer catheter, the inflation component is used to inflate the balloon, a fixing component is arranged in the connecting plate, and the fixing component is used to fix the fixing block.

[0007] In one embodiment of the utility model, two groups of slide grooves are provided in the connecting plate and in the two groups of mounting grooves, and two groups of sliders adapted to the slide grooves are fixedly connected to the outer wall of each mounting block, and the sliders are slidably installed in the slide grooves.

[0008] In one embodiment of the utility model, the two groups of mounting grooves are symmetrically arranged relative to the outer conduit, the outer conduit is composed of polyether block polyamide, polytetrafluoroethylene, stainless steel, polypropylene and polyethylene, and the inner conduit is made of polyether block polyamide, polytetrafluoroethylene, polypropylene and polyethylene.

[0009] In one embodiment of the utility model, a connecting groove is provided on the outer wall of the connecting plate on a side away from the mounting head, and the connecting groove is arranged perpendicular to the mounting groove. A second spring is fixedly connected to the inner wall of the connecting groove on a side away from the outer guide tube, and a fixing rod is fixedly connected to one end of the second spring close to the outer guide tube. Both ends of the fixing rod are fixedly connected to clamping blocks, and the two groups of clamping blocks are arranged with inclined surfaces on one side close to the fixing blocks.

[0010] In an embodiment of the present invention, a first spring is fixedly connected to the inner wall of each mounting groove close to the outer conduit, and one end of each first spring away from the conduit is fixedly connected to the outer surface of an adjacent mounting block.

[0011] In one embodiment of the utility model, the inflation component includes an inflation bin fixedly connected to the outer wall of the outer catheter, an inflation tube fixedly connected inside the inflation bin, an inflation head fixedly connected to the end of the inflation tube, the inflation tube is arranged through the outer catheter, the end of the inflation tube away from the inflation head is arranged inside the balloon, a threaded rod is threadedly connected to the outer wall of the inflation bin, a knob is fixedly connected to the end of the threaded rod away from the inflation bin, and a rubber pressure plate is rotatably connected to the end of the threaded rod away from the knob.

[0012] In one embodiment of the utility model, two groups of limit grooves are opened on the outer wall of the inflation bin, and the two groups are respectively located on both sides of the rubber pressure plate. Two groups of limit blocks are fixedly connected to the outer wall of the rubber pressure plate. The limit blocks are adapted to the size of the limit grooves, and the limit blocks are slidably installed in the limit grooves.

[0013] In one embodiment of the utility model, a guide wire is fixedly connected inside the inner catheter, a traction rod is fixedly connected inside the outer catheter, and one end of the traction rod close to the installation head is located outside the outer catheter.

[0014] The above technical solution of the utility model has the following advantages compared with the prior art:

[0015] The utility model discloses a fallopian tube angiography catheter, which, during the movement, will respectively contact the inclined surfaces of the adjacent clamping blocks through the two sets of fixing blocks. As the two sets of fixing blocks continue to move, the two sets of fixing blocks will squeeze the fixing rod to the side away from the outer catheter and compress the second spring. As the staff continues to push the squeezing blocks, the fixing blocks will squeeze the outer catheter, thereby driving the outer catheter to squeeze the inner catheter. Through such an arrangement, when the staff pushes the squeezing blocks, the outer catheter and the inner catheter can be clamped, thereby achieving a sealing effect on the inner catheter, avoiding the backflow of contrast agent in the inner catheter, thereby improving the angiography effect.

[0016] The utility model discloses a salpingography catheter, which is implemented by inserting an external catheter into the fallopian tube, and then using an external inflator to inflate the balloon through an inflation head. The balloon will expand after the inflation is completed, thereby sealing the fallopian tube and preventing the contrast agent from flowing out of the uterus. Then, the knob is turned, and the threaded rod is driven to rotate when the knob is turned. The threaded rod is driven to move downward during the rotation, thereby driving the rubber pressure plate to squeeze the inflation tube. The inflation tube is sealed after being squeezed, thereby preventing the airflow in the balloon from flowing back from the inflation tube, thereby ensuring that the balloon has a good sealing effect on the fallopian tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments of the utility model in combination with the accompanying drawings.

[0018] Figure 1 It is the front view of the utility model;

[0019] Figure 2 It is a cross-sectional view of the utility model;

[0020] Figure 3 It is a cross-sectional view of the mounting head in the utility model;

[0021] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0022] Figure 5 It is a structural schematic diagram of the connecting plate in the utility model;

[0023] Figure 6 It is a cross-sectional view of the inflatable bin in the utility model.

[0024] Explanation of the reference numerals in the specification: 1. outer catheter; 2. mounting head; 3. inner catheter; 4. injection head; 5. guide wire; 6. traction rod; 7. balloon; 8. inflation chamber; 9. inflation tube; 10. threaded rod; 11. knob; 12. rubber pressure plate; 13. slide groove; 14. slider; 15. inflation head; 16. connecting plate; 17. mounting groove; 18. mounting block; 19. fixing block; 20. extrusion block; 21. first spring; 22. limit groove; 23. limit block; 24. connecting groove; 25. fixing rod; 26. second spring; 27. clamping block. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0026] Reference Figure 1-Figure 6As shown, a fallopian tube angiography catheter of the utility model comprises a mounting head 2, one end of the mounting head 2 is fixedly connected to an outer catheter 1, an injection head 4 is fixedly connected inside the mounting head 2, an end of the injection head 4 close to the outer catheter 1 is fixedly connected to an inner catheter 3, the inner catheter 3 penetrates the outer catheter 1, and an end of the mounting head 2 close to the outer catheter 1 and located outside the outer catheter 1 is fixedly connected to a connecting plate 16, and two groups of mounting grooves 17 are provided on the side of the connecting plate 16 away from the mounting head 2, and mounting grooves 17 are slidably connected to the two groups of mounting grooves 17. Block 18, each of the mounting blocks 18 is fixedly connected to a fixing block 19 on one side away from the mounting head 2, each of the fixing blocks 19 is fixedly connected to an extrusion block 20 on one end away from the outer catheter 1, and the extrusion block 20 is arranged in a circular ring at one end away from the fixing block 19, and the outer catheter 1 is fixedly connected to a balloon 7 at one end away from the mounting head 2, and an inflatable component is arranged outside the outer catheter 1, and the inflatable component is used to inflate the balloon 7, and a fixing component is arranged inside the connecting plate 16, and the fixing component is used to fix the fixing block 19;

[0027] In order to ensure that the external catheter 1 has a good clamping effect, when using the contrast catheter, the external catheter 1 is first inserted into the fallopian tube, and then the balloon 7 is inflated through the inflation component. The balloon 7 will expand after the inflation is completed, thereby closing the fallopian tube. After that, the medical staff can inject the contrast agent into the uterine cavity through the inner catheter 3. After the contrast agent injection is completed, the inflated balloon 7 can prevent the contrast agent in the uterine cavity from flowing out. Then the staff needs to push the two groups of squeezing blocks 20 toward the external catheter 1 at the same time. During the movement of the squeezing blocks 20, the fixing blocks 19 are driven. In contact with the outer surface of the outer catheter 1, as the staff continues to push the squeezing block 20, the fixed block 19 will squeeze the outer catheter 1, thereby driving the outer catheter 1 to squeeze the inner catheter 3. Through such a configuration, when the staff pushes the squeezing block 20, the outer catheter 1 and the inner catheter 3 can be clamped, thereby sealing the inner catheter 3 and preventing the contrast agent in the inner catheter 3 from flowing back, thereby improving the contrast effect. Subsequently, the positions of the two groups of fixed blocks 19 are fixed by the fixing assembly. At this time, the staff can free their hands to do other work, thereby improving the efficiency of the contrast examination.

[0028] In one embodiment of the utility model, two groups of slide grooves 13 are provided in the connecting plate 16 and in the two groups of mounting grooves 17, and two groups of sliders 14 adapted to the slide grooves 13 are fixedly connected to the outer wall of each mounting block 18, and the sliders 14 are slidably installed in the slide grooves 13;

[0029] When the mounting block 18 moves, it will drive the slider 14 to move in the slide groove 13. The slider 14 can limit the mounting block 18 to prevent the staff from tilting or warping when pushing the squeezing block 20, thereby ensuring that the fixing block 19 can have a good squeezing effect on the external catheter 1, thereby ensuring that the subsequent internal catheter 3 is in a stop flow state to prevent the contrast agent from flowing back.

[0030] In one embodiment of the utility model, the two groups of mounting grooves 17 are symmetrically arranged relative to the outer conduit 1, the outer conduit 1 is made of polyether block polyamide, polytetrafluoroethylene, stainless steel, polypropylene and polyethylene, and the inner conduit 3 is made of polyether block polyamide, polytetrafluoroethylene, polypropylene and polyethylene;

[0031] The symmetrically arranged mounting grooves 17 can ensure that the two sets of fixing blocks 19 are in a parallel state, thereby ensuring that the subsequent fixing blocks 19 have a good contact effect when clamping and fixing the external catheter 1, thereby improving the clamping effect of the external catheter 1 and the internal catheter 3.

[0032] In one embodiment of the utility model, a connecting groove 24 is provided on the outer wall of the connecting plate 16 away from the mounting head 2, and the connecting groove 24 is arranged perpendicularly to the mounting groove 17. A second spring 26 is fixedly connected to the inner wall of the connecting groove 24 away from the outer conduit 1, and a fixing rod 25 is fixedly connected to one end of the second spring 26 close to the outer conduit 1, and both ends of the fixing rod 25 are fixedly connected to a clamping block 27, and the two sets of the clamping blocks 27 are arranged on an inclined surface on one side close to the fixing block 19;

[0033] When the outer catheter 1 and the inner catheter 3 are clamped, the two groups of fixing blocks 19 will move toward the outer catheter 1 at the same time. During the movement, the two groups of fixing blocks 19 will respectively contact the inclined surfaces of the adjacent clamping blocks 27. As the two groups of fixing blocks 19 continue to move, the two groups of fixing blocks 19 will squeeze the fixing rod 25 to the side away from the outer catheter 1 and compress the second spring 26. When the two groups of fixing blocks 19 complete the clamping of the outer catheter 1 and the inner catheter 3, the clamping block 27 is no longer limited by the fixing block 19. At this time, the fixing rod 25 will move and reset to the side of the outer catheter 1 under the action of the elastic restoring force of the second spring 26 itself, thereby driving the two groups of clamping blocks 27 to move to the two sides of the two groups of fixing blocks 19 respectively, thereby realizing the limit fixation of the position of the fixing block 19, ensuring the fixation of the position of the two groups of fixing blocks 19, and then improving the clamping effect of the fixing block 19 on the inner catheter 3.

[0034] In one embodiment of the utility model, each of the mounting grooves 17 is fixedly connected to an inner wall on a side close to the outer catheter 1 with a first spring 21, and each of the first springs 21 is fixedly connected to an outer surface of an adjacent mounting block 18 at one end away from the catheter. When the fixing block 19 moves toward the outer catheter 1, the first spring 21 will be stretched. After a detection operation is completed, it is only necessary to move the fixing rod 25 to the side away from the outer catheter 1. When the fixing rod 25 moves, it will drive the clamping block 27 to separate from the fixing block 19. When the clamping block 27 is completely separated from the fixing block 19, the fixing block 19 will be reset under the action of the elastic restoring force of the first spring 21 itself, thereby driving the two groups of fixing blocks 19 to reset, which is convenient for subsequent use.

[0035] In one embodiment of the utility model, the inflation component includes an inflation bin 8 fixedly connected to the outer wall of the outer catheter 1, an inflation tube 9 fixedly connected inside the inflation bin 8, an inflation head 15 fixedly connected to the end of the inflation tube 9, the inflation tube 9 is arranged to pass through the outer catheter 1, and the end of the inflation tube 9 away from the inflation head 15 is arranged inside the balloon 7, the outer wall of the inflation bin 8 is threadedly connected to a threaded rod 10, the end of the threaded rod 10 away from the inflation bin 8 is fixedly connected to a knob 11, and the end of the threaded rod 10 away from the knob 11 is rotatably connected to a rubber pressure plate 12;

[0036] After the outer catheter 1 is inserted into the fallopian tube, an external inflator is used to inflate the balloon 7 through the inflation head 15. The balloon 7 will expand after the inflation is completed, thereby sealing the fallopian tube and preventing the contrast agent from flowing out of the uterus. Then the knob 11 is turned. The knob 11 will drive the threaded rod 10 to rotate when it is turned. The threaded rod 10 will drive the rubber pressure plate 12 to move downward during the rotation, thereby driving the rubber pressure plate 12 to squeeze the inflation tube 9. The inflation tube 9 will be closed after being squeezed, thereby preventing the airflow in the balloon 7 from flowing back from the inflation tube 9, thereby ensuring that the balloon 7 has a good sealing effect on the fallopian tube.

[0037] In one embodiment of the utility model, two groups of limit grooves 22 are opened on the outer wall of the inflation bin 8, and the two groups are respectively located on both sides of the rubber pressure plate 12. Two groups of limit blocks 23 are fixedly connected to the outer wall of the rubber pressure plate 12. The limit blocks 23 are adapted to the size of the limit grooves 22. The limit blocks 23 are slidably installed in the limit grooves 22. When the rubber pressure plate 12 moves, it will drive the limit blocks 23 to move in the limit grooves 22. The limit blocks 23 can limit the rubber pressure plate 12 to avoid the situation where the threaded rod 10 drives the rubber pressure plate 12 to rotate synchronously when rotating due to excessive friction between the rubber pressure plate 12 and the threaded rod 10, thereby ensuring that the rubber pressure plate 12 can have a good clamping effect on the inflation tube 9.

[0038] In one embodiment of the utility model, a guide wire 5 is fixedly connected inside the inner catheter 3, and a traction rod 6 is fixedly connected inside the outer catheter 1. The end of the traction rod 6 close to the mounting head 2 is located outside the outer catheter 1. The traction rod 6 can play a guiding and positioning effect, and can increase the hardness of the outer catheter 1 during transportation, so as to facilitate the transportation and positioning of the outer catheter 1. The guide wire 5 can position the transportation product so that the product can pass through the narrow part of the fallopian tube and dredge the fallopian tube.

[0039] Working principle: In order to ensure that the external catheter 1 has a good clamping effect, when using the contrast catheter, first insert the external catheter 1 into the fallopian tube, and then use an external inflator to inflate through the inflation head 15, so as to achieve inflation of the balloon 7. After the inflation is completed, the balloon will expand, thereby sealing the fallopian tube to prevent the contrast agent from flowing out of the uterus, and then turn the knob 11. The knob 11 will drive the threaded rod 10 to rotate when it is rotated. The threaded rod 10 will drive the rubber pressing plate 12 to move downward during the rotation process, thereby driving the rubber pressing plate 12 to squeeze the inflation tube 9. After the inflation tube 9 is squeezed, it will be closed, thereby preventing the airflow in the balloon 7 from flowing back from the inflation tube 9, thereby ensuring that the balloon 7 has a good sealing effect on the fallopian tube;

[0040] After that, the medical staff can inject the contrast agent into the uterine cavity through the inner catheter 3. When the contrast agent injection is completed, the inflated balloon 7 can prevent the contrast agent in the uterine cavity from flowing out. Then the staff needs to push the two groups of squeezing blocks 20 toward the outer catheter 1 at the same time. During the movement of the squeezing blocks 20, the two groups of fixing blocks 19 will drive the movement. During the movement, the two groups of fixing blocks 19 will respectively contact the inclined surfaces of the adjacent clamping blocks 27. As the two groups of fixing blocks 19 continue to move, the two groups of fixing blocks 19 will squeeze the fixing rod 25 to the side away from the outer catheter 1 and compress the second spring 26. As the staff continues to push the squeezing blocks 20, the fixing blocks 19 will squeeze the outer catheter 1, thereby driving the outer catheter 1 to squeeze the inner catheter 3. Through such a setting, when the staff pushes the squeezing blocks 20, the outer catheter 1 and the inner catheter 3 can be clamped, thereby achieving a sealing effect on the inner catheter 3, preventing the contrast agent in the inner catheter 3 from flowing back, thereby improving the imaging effect.

[0041] When the two groups of fixing blocks 19 complete the clamping of the outer catheter 1 and the inner catheter 3, the clamping block 27 is no longer limited by the fixing block 19. At this time, the fixing rod 25 will move to the side of the outer catheter 1 and reset under the action of the elastic restoring force of the second spring 26, thereby driving the two groups of clamping blocks 27 to move to the two sides of the two groups of fixing blocks 19 respectively, thereby realizing the limit fixation of the position of the fixing block 19, ensuring the fixation of the position of the two groups of fixing blocks 19, and further improving the clamping effect of the fixing block 19 on the inner catheter 3.

[0042] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the invention of the utility model.

Claims

1. A salpingography catheter, characterized in that: The invention comprises a mounting head (2), one end of the mounting head (2) being fixedly connected to an outer conduit (1), an injection head (4) being fixedly connected inside the mounting head (2), an end of the injection head (4) close to the outer conduit (1) being fixedly connected to an inner conduit (3), the inner conduit (3) being arranged to penetrate the outer conduit (1), an end of the mounting head (2) close to the outer conduit (1) and being fixedly connected to a connecting plate (16) located outside the outer conduit (1), two groups of mounting grooves (17) being provided on a side of the connecting plate (16) away from the mounting head (2), both groups of mounting grooves (17) being slidably connected to mounting blocks (18), each A fixing block (19) is fixedly connected to one side of each of the mounting blocks (18) away from the mounting head (2); an end of each of the fixing blocks (19) away from the outer catheter (1) is fixedly connected to an extrusion block (20); the end of the extrusion block (20) away from the fixing block (19) is arranged in a circular ring shape; an end of the outer catheter (1) away from the mounting head (2) is fixedly connected to a balloon (7); an inflation component is arranged outside the outer catheter (1); the inflation component is used to inflate the balloon (7); a fixing component is arranged inside the connecting plate (16); the fixing component is used to fix the fixing block (19).

2. A salpingography catheter according to claim 1, characterized in that: Two groups of slide grooves (13) are provided in the connection plate (16) and in the two groups of mounting grooves (17); two groups of sliding blocks (14) adapted to the slide grooves (13) are fixedly connected to the outer wall of each mounting block (18); the sliding blocks (14) are slidably mounted in the slide grooves (13).

3. A salpingography catheter according to claim 2, characterized in that: The two groups of mounting grooves (17) are symmetrically arranged relative to the outer conduit (1).

4. A salpingography catheter according to claim 3, characterized in that: A connecting groove (24) is provided on an outer wall of the connecting plate (16) at a side away from the mounting head (2), the connecting groove (24) being arranged perpendicularly to the mounting groove (17), a second spring (26) being fixedly connected to an inner wall of the connecting groove (24) at a side away from the outer conduit (1), a fixing rod (25) being fixedly connected to one end of the second spring (26) close to the outer conduit (1), both ends of the fixing rod (25) being fixedly connected to clamping blocks (27), and both sets of the clamping blocks (27) having sides close to the fixing blocks (19) being arranged with inclined surfaces.

5. A salpingography catheter according to claim 4, characterized in that: A first spring (21) is fixedly connected to the inner wall of each mounting groove (17) on one side close to the outer conduit (1), and an end of each first spring (21) away from the conduit is fixedly connected to the outer surface of an adjacent mounting block (18).

6. A salpingography catheter according to claim 5, characterized in that: The inflation assembly comprises an inflation chamber (8) fixedly connected to the outer wall of the outer catheter (1), an inflation tube (9) fixedly connected inside the inflation chamber (8), an inflation head (15) fixedly connected to the end of the inflation tube (9), the inflation tube (9) passing through the outer catheter (1), an end of the inflation tube (9) away from the inflation head (15) being arranged inside the balloon (7), a threaded rod (10) being threadedly connected to the outer wall of the inflation chamber (8), an end of the threaded rod (10) away from the inflation chamber (8) being fixedly connected to a knob (11), and an end of the threaded rod (10) away from the knob (11) being rotatably connected to a rubber pressure plate (12).

7. A salpingography catheter according to claim 6, characterized in that: The outer wall of the inflation bin (8) is provided with two groups of limit grooves (22), the two groups being respectively located on both sides of the rubber pressure plate (12), the outer wall of the rubber pressure plate (12) being fixedly connected with two groups of limit blocks (23), the limit blocks (23) being adapted in size to the limit grooves (22), and the limit blocks (23) being slidably mounted in the limit grooves (22).

8. A salpingography catheter according to claim 7, characterized in that: A guide wire (5) is fixedly connected inside the inner catheter (3), and a traction rod (6) is fixedly connected inside the outer catheter (1); an end of the traction rod (6) close to the mounting head (2) is located outside the outer catheter (1).

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