Extracorporeal circulation catheter cannula stable in connection

Abstract

The utility model relates to the technical field of medical instruments, and discloses an extracorporeal circulation catheter cannula stable in connection, the extracorporeal circulation catheter cannula stable in connection comprises an extracorporeal circulation machine, a base, a fixing ring, a threaded column, a lock hole, a lock catch, a movable block, a movable groove, a spring and a plug pin, the threaded column is connected with different pipeline parts and provides structural support, and the lock hole is formed in the base. The lock hole is used for fixing the safety lock catch mechanism and guaranteeing the connection safety, and the connecting pipe serves as a part of the catheter system and is responsible for conveying blood or liquid. The stably-connected extracorporeal circulation catheter cannula has extremely high safety and reliability, accidental connection looseness caused by movement or other external factors in the operation process is effectively prevented through combined use of the lock catch and the plug pin, it is guaranteed that leakage does not occur in the connecting position through the design of the sealing gasket and the internal thread, and the safety of the operation is improved. A stable blood flowing environment is provided for an operation, and the safety guarantee of the whole operation process is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to an extracorporeal circulation catheter cannula with stable connection. Background Art

[0002] An extracorporeal circulation catheter is a medical device used during cardiac surgery, especially during cardiac arrest, to maintain the patient's blood circulation. This device draws the patient's blood from the body, oxygenates and regulates its temperature through an artificial circulatory system, and then returns the processed blood to the body. The extracorporeal circulation catheter is crucial because it connects the patient's blood vessels to the extracorporeal circulation machine. Its design and function directly affect the safety and efficiency of the operation. Traditional extracorporeal circulation catheters are usually composed of multiple parts, including various tubes, connectors and sealing components, which must remain intact and leak-free during surgery.

[0003] Traditional extracorporeal circulation catheter cannulation systems often face the problem of connection stability. Due to mechanical vibration, operation movement and other factors during surgery, the cannula joint may loosen or fall off. This unstable connection may lead to serious complications such as air embolism or blood leakage. In addition, the sealing performance of traditional joints often depends on the precision of manual operation, which increases the risk and complexity of surgery. These shortcomings indicate that a more reliable and efficient extracorporeal circulation catheter cannulation design is needed to ensure the firmness of the connection and improve the overall surgical safety. Utility Model Content

[0004] (1) Technical problems solved

[0005] The purpose of the utility model is to provide an extracorporeal circulation catheter cannula with a stable connection, so as to solve the problem in the above background technology that the traditional extracorporeal circulation catheter cannula may become loose or fall off during use.

[0006] (2) Technical solution

[0007] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: a stable extracorporeal circulation catheter cannula, which comprises an extracorporeal circulation machine, a base, a fixing ring, a threaded column, a locking hole, a connecting pipe, a reflux valve, a catheter body, a fastening ring, a locking ring, an internal thread, a limiting end, a sealing gasket, a locking buckle, a movable block, a movable groove, a spring and a latch. The right end of the extracorporeal circulation machine is provided with a base, the right end of the base is provided with a fixing ring, the right end of the fixing ring is provided with a threaded column, the right end of the threaded column is provided with a locking hole, and a connecting pipe is provided inside the threaded column. The extracorporeal circulation machine provides power and control for the entire circulation system, the base supports and fixes the entire circulation mechanism to ensure stable operation of the equipment, the fixing ring is used to connect and fix the threaded column, and provides an interface for further component installation, the threaded column connects different pipeline components to provide structural support, the locking hole is used to fix the safety locking mechanism to ensure the safety of the connection, and the connecting pipe is responsible for transporting blood or liquid as part of the catheter system.

[0008] Preferably, a reflux valve is provided on the connecting tube, and a catheter body is provided on the right side of the connecting tube. The reflux valve prevents liquid from flowing back, ensuring the one-way flow of the circulatory system. The catheter body is the main delivery channel, transmitting blood to or from the extracorporeal circulation machine.

[0009] Preferably, a fastening ring is provided at the left end of the catheter body, and a locking ring is movably provided at the left end of the fastening ring. The fastening ring is used to fix and seal the connection to reduce leakage. The locking ring cooperates with the corresponding threaded column through the internal thread to achieve a stable connection.

[0010] Preferably, the interior of the locking ring is provided with an internal thread, and the locking ring is provided with a limiting end at one end close to the fastening ring. The internal thread cooperates with the external thread to ensure the sealing and fixation of the connecting part. The limiting end provides position limitation when rotating the locking ring to maintain the accuracy of rotation.

[0011] Preferably, a sealing gasket is provided at the left end of the catheter body, and a lock buckle is provided at the front end of the locking ring. The sealing gasket provides additional sealing at the joint to prevent liquid leakage. The lock buckle serves as a safety mechanism to ensure that the connection will not be accidentally loosened by locking the pin.

[0012] Preferably, the lower end of the lock is connected to a movable block, the outer ring of the movable block is provided with a movable groove, the movable block is connected to the lock and the spring, so that the lock can move and lock or release the pin, and the movable groove provides a sliding path for the movable block, making it smoother during operation.

[0013] Preferably, a spring is provided between the movable block and the movable groove, and a pin is provided at the left end of the movable block. The spring provides the necessary tension to support the rapid locking and release of the lock, and the pin locks the connection by inserting into the keyhole to ensure that the fixation between the components will not fall off due to vibration or external force.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. This stable extracorporeal circulation catheter cannula has extremely high safety and reliability. The combination of a lock and a latch effectively prevents accidental loosening of the connection due to movement or other external factors during surgery. The design of the sealing gasket and internal thread ensures that there will be no leakage at the connection, providing a stable blood flow environment for surgery and enhancing the safety of the entire surgical process.

[0016] 2. The stable connection of the extracorporeal circulation catheter makes installation and removal quick and easy. The design of the locking ring and threaded column allows for quick rotation and locking, greatly reducing surgical preparation time. The design of the movable block and spring also supports quick release, simplifying the operation requirements in emergency situations. This design not only improves operational efficiency but also reduces the workload of medical staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of the circulation catheter cannula of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the female connection seat of the utility model;

[0019] Figure 3 This is a schematic diagram of the cross-sectional structure of the circulation catheter cannula of the utility model;

[0020] Figure 4 This is a schematic diagram of the cross-sectional connection of the circulation catheter cannula of the utility model;

[0021] Figure 5 For this utility model Figure 4 A magnified view of the middle panel.

[0022] In the figure: 1. Extracorporeal circulation machine; 2. Base; 3. Fixing ring; 4. Threaded column; 5. Locking hole; 6. Connecting tube; 7. Reflux valve; 8. Catheter body; 9. Fastening ring; 10. Locking ring; 11. Internal thread; 12. Limit end; 13. Sealing gasket; 14. Locking buckle; 15. Movable block; 16. Movable groove; 17. Spring; 18. Pin. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] See also Figure 1-Figure 5 The utility model provides a technical solution: a cannula for an extracorporeal circulation catheter with a stable connection, which comprises an extracorporeal circulation machine 1, a base 2, a fixing ring 3, a threaded column 4, a locking hole 5, a connecting pipe 6, a backflow valve 7, a catheter body 8, a fastening ring 9, a locking ring 10, an internal thread 11, a limiting end 12, a sealing gasket 13, a locking buckle 14, a movable block 15, a movable groove 16, a spring 17 and a latch 18. The right end of the extracorporeal circulation machine 1 is provided with a base 2, the right end of the base 2 is provided with a fixing ring 3, and the right end of the fixing ring 3 is provided with a threaded column. 4. A lock hole 5 is provided at the right end of the threaded column 4, and a connecting tube 6 is provided inside the threaded column 4. The extracorporeal circulation machine 1 provides the necessary mechanical power and control to maintain blood circulation. The base 2 provides a stable support and installation platform for the equipment. The fixing ring 3 is used to firmly fix the threaded column 4 to ensure the stability of the connection. The threaded column 4 serves as the main structural support and provides an installation point for the connecting tube 6. The lock hole 5 is designed to receive the pin 18 to lock or release the connection. The connecting tube 6 is a channel for transporting blood and is equipped with a backflow valve 7 to prevent blood from flowing back, ensuring that blood can only flow in one direction.

[0025] A backflow valve 7 is provided on the connecting tube 6, and a catheter body 8 is provided on the right side of the connecting tube 6. A fastening ring 9 is provided on the left end of the catheter body 8, and a locking ring 10 is movably provided on the left end of the fastening ring 9. An internal thread 11 is provided inside the locking ring 10, and a limiting end 12 is provided at one end of the locking ring 10 close to the fastening ring 9. The catheter body 8 is the main channel for blood to pass through. The fastening ring 9 helps to fix and seal the connection between the catheter body 8 and other components. The locking ring 10 cooperates with the thread of the threaded column 4 through its internal internal thread 11 to achieve fastening, and the limiting end 12 ensures the position accuracy of the locking ring 10 during rotation.

[0026] A sealing gasket 13 is provided at the left end of the catheter body 8, and a lock buckle 14 is provided at the front end of the locking ring 10. The lower end of the lock buckle 14 is connected to a movable block 15. The outer ring of the movable block 15 is provided with a movable groove 16. A spring 17 is provided between the movable block 15 and the movable groove 16. A pin 18 is provided at the left end of the movable block 15. The sealing gasket 13 provides additional sealing at the connection part to prevent liquid leakage. The lock buckle 14 can push the movable block 15 to lock or unlock through operation. The movable block 15 cooperates with the movable groove 16 to allow the lock buckle 14 to slide therein. The spring 17 provides the necessary pressure to support the rapid locking and release of the lock buckle 14. The pin 18 is a key part of the locking mechanism and is inserted into the lock hole 5 to fix or release the catheter body 8. The overall design ensures the reliability of the connection and the convenience of operation during extracorporeal circulation, making medical operations smoother and safer.

[0027] Working principle: The extracorporeal circulation machine 1 provides stable support for the equipment through the base 2. The base 2 is connected to the fixing ring 3 for fixing the threaded column 4. The threaded column 4 is equipped with a locking hole 5 and a connecting tube 6. The backflow valve 7 in the connecting tube 6 ensures that blood can only flow in one direction to avoid backflow problems. The connecting tube 6 extends to the catheter body 8. The catheter body 8 is connected to the locking ring 10 through a fastening ring 9. The internal thread 11 inside the locking ring 10 enables it to accurately match the external thread on the threaded column 4 to achieve a stable mechanical connection. The locking ring 10 cooperates with the fastening ring 9 through the limiting end 12 to ensure stability during rotation. The sealing gasket 13 provides the necessary seal between the catheter body 8 and the locking ring 10 to prevent liquid leakage. The lock buckle 14 is located at the front end of the locking ring 10 and is connected to the locking ring 10. The movable block 15 is connected, and the movable block 15 is installed in the movable groove 16. The necessary tension is provided by the spring 17 to support the flexible plugging and unplugging operation of the pin 18. By manually rotating the locking ring 10, the internal thread 11 is combined with the external thread of the threaded column 4 to complete the connection process of the catheter body 8. When the locking ring 10 is rotated into place, the lock buckle 14 pushes the pin 18 to insert into the lock hole 5, further enhancing the stability of the connection. When the catheter needs to be disassembled, the operator pushes the lock buckle 14 to disengage the pin 18 from the lock hole 5, and then rotates the locking ring 10 in the opposite direction to disengage the internal thread 11 from the external thread of the threaded column 4 to complete the disassembly process. The entire design ensures a stable connection and easy-to-operate release of the extracorporeal circulation catheter cannula, thereby improving the safety and convenience during surgery.

[0028] Finally, it should be noted that the above content is only used to illustrate the technical solution of the utility model, rather than to limit the scope of protection of the utility model. Simple modifications or equivalent replacements of the technical solution of the utility model by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the utility model.

Claims

1. A cannula for an extracorporeal circulation catheter with a stable connection, comprising an extracorporeal circulation machine (1), a base (2) and a fixing ring (3), characterized in that: The right end of the extracorporeal circulation machine (1) is provided with a base (2), the right end of the base (2) is provided with a fixing ring (3), the right end of the fixing ring (3) is provided with a threaded column (4), the right end of the threaded column (4) is provided with a lock hole (5), and the interior of the threaded column (4) is provided with a connecting pipe (6).

2. The extracorporeal circulation catheter cannula with stable connection according to claim 1, characterized in that: A backflow valve (7) is provided on the connecting pipe (6), and a catheter body (8) is provided on the right side of the connecting pipe (6).

3. The extracorporeal circulation catheter cannula with stable connection according to claim 2, characterized in that: A fastening ring (9) is provided at the left end of the catheter body (8), and a locking ring (10) is movably provided at the left end of the fastening ring (9).

4. The extracorporeal circulation catheter cannula with stable connection according to claim 3, characterized in that: The interior of the locking ring (10) is provided with an internal thread (11), and the locking ring (10) is provided with a limiting end (12) at one end close to the fastening ring (9).

5. The extracorporeal circulation catheter cannula with stable connection according to claim 3, characterized in that: A sealing gasket (13) is provided at the left end of the catheter body (8), and a locking buckle (14) is provided at the front end of the locking ring (10).

6. The extracorporeal circulation catheter cannula with stable connection according to claim 5, characterized in that: The lower end of the lock buckle (14) is connected to a movable block (15), and the outer ring of the movable block (15) is provided with a movable groove (16).

7. The extracorporeal circulation catheter cannula with stable connection according to claim 6, characterized in that: A spring (17) is provided between the movable block (15) and the movable groove (16), and a latch (18) is provided at the left end of the movable block (15).

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