Novel microcatheter

Abstract

The utility model discloses a novel micro-catheter which comprises a catheter body, one end of the catheter body is connected with a main micro-catheter, a connecting tube is arranged at the position, close to the main micro-catheter, of one side of the catheter body, the connecting tube is connected with one end of an auxiliary micro-catheter through a connecting mechanism convenient to disassemble and assemble, and a non-return mechanism for preventing blood from flowing back is arranged on the inner side of one end of the catheter body. The auxiliary micro-catheter can be conveniently and rapidly disassembled and assembled through the arranged connecting mechanism, blood can be effectively prevented from flowing back into the micro-catheter to form coagulation and block the micro-catheter through the arranged non-return mechanism, and then the auxiliary micro-catheter can be flexibly and rapidly replaced according to use requirements through the structure, so that the use efficiency is improved. Meanwhile, blood backflow can be prevented, and the situation that the smoothness of the microcatheter is affected by blood coagulation is avoided.

Description

Technical Field

[0001] This utility model relates to the field of microcatheter technology, specifically a novel microcatheter. Background Technology

[0002] Medical catheters are generally divided into those for angiography and those for injecting microparticles. They are mostly made of polyethylene and are produced in the United States, France, Japan, Denmark, and my country. In clinical practice, microcatheters and guidewires are usually used together in interventional procedures to improve the success rate of guidewire passage. Microcatheters can provide support for the guidewire and provide a channel for the guidewire to pass through the blood vessel.

[0003] When using existing dual-lumen microcatheters, they consist of a main microcatheter and a secondary microcatheter. However, the main and secondary microcatheters are often molded as a single piece, making it impossible to quickly replace the secondary microcatheter according to usage needs, which reduces practicality. Moreover, after the existing microcatheter enters the blood vessel, blood will flow back into the microcatheter, and blood clotting will affect the patency of the microcatheter, which is not conducive to drug delivery.

[0004] Therefore, a novel microcatheter is needed to address the problems mentioned in the background section. Utility Model Content

[0005] To address the above problems, this utility model provides a novel microcatheter.

[0006] This utility model provides the following technical solution: a novel microcatheter, including a tube body, one end of which is connected to a main microcatheter, and a connecting tube is provided on one side of the tube body near the main microcatheter. The connecting tube is connected to one end of a secondary microcatheter through a connecting mechanism that is easy to disassemble and assemble. A check mechanism to prevent blood backflow is provided on the inner side of one end of the tube body.

[0007] The connecting mechanism includes a connector, one end of the auxiliary microcatheter is provided with the connector, the outer ring of the connector is provided with an annular groove, one end of the connecting tube is provided with a groove adapted to the connector, the inner side of the groove is provided with a connector for insertion into the connector, the outer ring of the connecting tube is provided with multiple sets of placement slots, each of which holds a ball adapted to the annular groove, the outer ring of the connecting tube is provided with a fixing ring, the outer side of the fixing ring is slidably connected with a sliding sleeve, the inner side of the sliding sleeve away from the fixing ring is provided with an abutment plate, one side of the abutment plate is connected to one side of the fixing ring through a spring sleeved on the outer ring of the connecting tube.

[0008] In a further technical solution, the inner side of the sliding sleeve, located on one side of the contact plate, is provided with an active cavity to facilitate the outward movement of the ball.

[0009] In a further technical solution, the inner side of the tube body is permeated by a guide wire channel that facilitates the passage of the guide wire.

[0010] In a further technical solution, a metal wire mesh is embedded in the inner wall of the tube.

[0011] In a further technical solution, the check valve mechanism includes a rubber diaphragm, a valve body is installed on the inner side of one end of the tube, and the rubber diaphragm is installed on the inner side of the valve body. The rubber diaphragm is made of composite rubber material.

[0012] The beneficial effects of this utility model are:

[0013] 1. This utility model involves sliding a sleeve to one side of the connecting tube. The sleeve can move the contact plate to one side and compress the spring. Then, the connector of the secondary microcatheter is inserted into the groove. At the same time, the annular groove can press multiple sets of balls upward. When the connector is inserted to the bottom of the groove, the sleeve is released. Under the reaction force of the spring, the sleeve can drive the contact plate and the sleeve to move in opposite directions. As the contact plate moves in the opposite direction, it can press multiple sets of balls downward, thus pressing the multiple sets of balls through the inner side of the annular groove. This allows for a quick connection between the secondary microcatheter and the connecting tube. By reversing the operation, the secondary microcatheter and the connecting tube can be easily disassembled. Furthermore, through the above structure, the secondary microcatheter can be quickly replaced according to usage requirements, greatly improving the practicality of the device.

[0014] 2. This utility model, through the valve body, allows for easy installation of a check valve mechanism inside the microcatheter. The rubber diaphragm, due to its elasticity, can contact the valve body to achieve a seal, thereby preventing blood from flowing into the microcatheter. When injecting medication through the microcatheter, the rubber diaphragm is squeezed upwards under the action of thrust, thus opening the microcatheter opening and facilitating medication injection. Furthermore, this design prevents blood backflow and avoids blood clotting that could affect the patency of the microcatheter. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 This is a side cross-sectional view of the accessory microcatheter section;

[0017] Figure 3 This is a sectional view of the side of the tube body;

[0018] Figure 4 for Figure 2 Enlarged view of part A in the image;

[0019] Figure 5 for Figure 3Enlarged view of part B in the image.

[0020] In the diagram: 1. Tube body, 2. Main microcatheter, 3. Connecting tube, 4. Secondary microcatheter, 5. Insertion connector, 6. Annular groove, 7. Groove, 8. Connector, 9. Placement groove, 10. Sphere, 11. Fixing ring, 12. Sliding sleeve, 13. Contact plate, 14. Spring, 15. Movable cavity, 16. Metal wire mesh, 17. Guide wire channel, 18. Valve body, 19. Rubber diaphragm. Detailed Implementation

[0021] The embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0022] Example:

[0023] Reference Figures 1-5 A novel microcatheter includes a tube body 1, one end of which is connected to a main microcatheter 2. A connecting tube 3 is provided on one side of the tube body 1 near the main microcatheter 2. The connecting tube 3 is connected to one end of a secondary microcatheter 4 through a connecting mechanism that is easy to disassemble and assemble. A check mechanism to prevent blood backflow is provided on the inner side of one end of the tube body 1.

[0024] The connecting mechanism includes a connector 5. One end of the auxiliary microcatheter 4 is provided with a connector 5. The outer ring of the connector 5 is provided with an annular groove 6. One end of the connecting tube 3 is provided with a groove 7 that is adapted to the connector 5. The inner side of the groove 7 is provided with a connector 8 that is inserted into the connector 5. The outer ring of the connecting tube 3 is provided with multiple sets of placement grooves 9, each of which is provided with a ball 10 that is adapted to the annular groove 6. The outer ring of the connecting tube 3 is provided with a fixing ring 11. A sliding sleeve 12 is slidably connected to the outer side of the fixing ring 11. The inner side of the sliding sleeve 12 away from the fixing ring 11 is provided with an abutment plate 13. One side of the abutment plate 13 is connected to one side of the fixing ring 11 through a spring 14 sleeved on the outer ring of the connecting tube 3.

[0025] Specifically, by sliding the sleeve 12 to one side of the connecting tube 3, the sleeve 12 can drive the contact plate 13 to move to one side and compress the spring 14. Then, the connector 5 of the secondary microcatheter 4 is inserted into the groove 7. At the same time, the annular groove 6 can push the multiple sets of balls 10 upward. When the connector 5 is inserted to the bottom of the groove 7, the sleeve 12 is released. Under the reaction force of the spring 14, the sleeve 12 can drive the contact plate 13 and the sleeve 12 to move in opposite directions. While the contact plate 13 moves in the opposite direction, it can push the multiple sets of balls 10 downward, thereby... Multiple sets of spheres 10 can be squeezed through the inner side of the annular groove 6, thereby enabling a quick connection between the secondary microcatheter 4 and the connecting tube 3. By reversing the operation, the secondary microcatheter 4 and the connecting tube 3 can be easily disassembled. The anti-return mechanism effectively prevents blood from flowing back into the microcatheter and forming coagulation that blocks the microcatheter. Furthermore, through the above structure, the secondary microcatheter 4 can be quickly replaced flexibly according to usage needs, greatly improving the practicality of the device. At the same time, it can prevent blood backflow and avoid blood coagulation that affects the patency of the microcatheter.

[0026] The inner side of the sliding sleeve 12, located on one side of the contact plate 13, is provided with a movable cavity 15 to facilitate the outward movement of the ball 10. The movable cavity 15 facilitates the movement of the ball 10 so as to facilitate the insertion of the connector 5 into the groove 7.

[0027] The inner side of the tube body 1 is provided with a guide wire channel 17 for easy guide wire passage. The guide wire channel 17 facilitates the passage of the guide wire.

[0028] The inner wall of the tube body 1 is embedded with a metal wire mesh 16. The metal wire mesh 16 can improve the strength of the microcatheter and prevent the microcatheter from being squeezed and deformed during its passage.

[0029] The check valve mechanism includes a rubber diaphragm 19. A valve body 18 is installed inside one end of the tube 1, and a rubber diaphragm 19 is installed inside the valve body 18. The rubber diaphragm 19 is made of composite rubber. The valve body 18 allows the check valve mechanism to be easily installed inside the microcatheter. Due to its elasticity, the rubber diaphragm 19 can come into contact with the valve body 18 to achieve a seal, thereby preventing blood from flowing into the microcatheter. When injecting medication through the microcatheter, the rubber diaphragm 19 can be squeezed upwards under the action of thrust, thereby opening the opening of the microcatheter and facilitating the injection of medication. Furthermore, this design prevents blood backflow and avoids blood clotting that could affect the patency of the microcatheter.

[0030] Working principle: First, by sliding the sleeve 12 to one side of the connecting tube 3, the sleeve 12 can drive the contact plate 13 to move to one side and compress the spring 14. Then, the connector 5 of the sub-microcatheter 4 is inserted into the groove 7. At the same time, the annular groove 6 can push multiple sets of balls 10 upward. When the connector 5 is inserted to the bottom of the groove 7, the sleeve 12 is released. Under the action of the reaction force of the spring 14, the sleeve 12 can drive the contact plate 13 and the sleeve 12 to move in opposite directions. While the contact plate 13 moves in the opposite direction, it can push multiple sets of balls 10 downward, so that multiple sets of balls 10 can be pressed through the inner side of the annular groove 6, thereby completing the quick connection between the sub-microcatheter 4 and the connecting tube 3. By reversing the operation, the sub-microcatheter 4 and the connecting tube 3 can be easily disassembled.

[0031] The rubber diaphragm 19, due to its elasticity, can come into contact with the valve body 18 to achieve a seal, thereby preventing blood from flowing into the microcatheter. When injecting medication through the microcatheter, the rubber diaphragm 19 can be squeezed upward under the action of thrust, thereby opening the opening of the microcatheter and facilitating the injection of medication, thus completing the entire operation process.

[0032] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0033] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A novel microcatheter comprising a tube body, characterized in that: One end of the pipe body is connected with a main microcatheter, one side of the pipe body is provided with a connecting pipe near the position of the main microcatheter, the connecting pipe is connected with one end of a vice microcatheter through a convenient dismounting connecting mechanism, and the inner side of one end of the pipe body is provided with a check mechanism for preventing blood backflow. The connecting mechanism comprises a plug connector, one end of the vice microcatheter is provided with the plug connector, the outer ring of the plug connector is provided with an annular clamping groove, one end of the connecting pipe is provided with a groove matched with the plug connector, the inner side of the groove is provided with a connecting head matched with the plug connector, the outer ring of the connecting pipe is provided with a plurality of groups of placing grooves, and a ball matched with the annular clamping groove is placed in each group of the placing grooves, the outer ring of the connecting pipe is provided with a fixing ring, the outer side of the fixing ring is slidably connected with a sliding sleeve, the inner side of the sliding sleeve is provided with a resisting plate away from one end of the fixing ring, and one side of the resisting plate is connected with one side of the fixing ring through a spring sleeved on the outer ring of the connecting pipe.

2. A novel microcatheter as claimed in claim 1, wherein: The inner side of the sliding sleeve is provided with a movable cavity on one side of the resisting plate, so that the ball can move outward.

3. A novel microcatheter as claimed in claim 1, wherein: The inner side of the pipe body is provided with a guide wire channel for conveniently guiding a guide wire.

4. A novel microcatheter as claimed in claim 3, wherein: The inner wall of the pipe body is embedded with a metal wire mesh.

5. A novel microcatheter as claimed in claim 3, wherein: The check mechanism comprises a rubber film, the inner side of one end of the pipe body is provided with a valve body, the inner side of the valve body is provided with the rubber film, and the rubber film is made of composite rubber material.

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