Post-formed pigtail catheter

Abstract

The utility model relates to a post forming pigtail catheter, the post forming pigtail catheter includes drainage pipe body, catheter joint and forming rod, the wire tube body end communicates with the front end of catheter joint, the pipe wall of wire tube body is equipped with forming cavity, the forming rod penetrates catheter joint, inserts forming cavity, and abuts at the closed end of forming cavity front end, and the pigtail curl is presented to the forming rod front end, the utility model provides a post forming pigtail catheter, and guarantees that the human body inside except drainage pipe body, will not have other components and human body tissue contact, effectively prevents the cutting condition caused by implanting the existing pigtail catheter.

Description

Technical Field

[0001] This utility model relates to the technical field of medical devices, and in particular to a post-formed pig tail catheter. Background Technology

[0002] A pigtail catheter refers to a catheter with its tip curled into a "pig tail" shape, and it is widely used in minimally invasive drainage, angiography, or cavity support. Existing pigtail catheters, such as the patented pigtail drainage tube with authorization publication number CN220002718U, are equipped with a pull wire 500 and a catheter connector 300. The outer wall of the catheter connector 300 has a pull wire groove 340. The pull wire 500 connects to the pigtail bend 210, passes through the first drainage channel hole 201, and enters the pull wire groove 340. By pulling the pull wire 500, the distal end of the drainage tube is tightened to form the pigtail bend 210. If the pull wire 500 is not pulled, the pigtail bend 210 is straight. However, regardless of whether the pigtail bend 210 is curled or straight, a portion of the pull wire 500 will inevitably be exposed outside the drainage tube body 200 at the pigtail bend 210. When the pig tail catheter is in a straight position and deeply inserted into the human body, the exposed wire 500 can cause cuts to human tissue. When the curved part 210 of the pig tail changes to a curled state, the exposed wire 500 has more opportunities to come into contact with human tissue, making cuts more likely. There is an urgent need for a pig tail catheter that can reduce cuts. Utility Model Content

[0003] The purpose of this invention is to solve the above problems and provide a post-formed pig tail catheter.

[0004] The technical solution of this utility model is as follows: A post-formed pig tail catheter includes a drainage tube body, a catheter connector, and a forming rod; the end of the drainage tube body is connected to the front end of the catheter connector; the tube wall of the drainage tube body is provided with a forming cavity; the forming rod passes through the catheter connector, is inserted into the forming cavity, and abuts against the closed end of the front end of the forming cavity; the front end of the forming rod is curled into a pig tail shape; the drainage tube body enters the human body before the forming rod and is restricted by the human tissue; when the front end of the forming rod passes through the catheter connector, it is restricted by the catheter connector and forced to be in a straight state, smoothly entering the forming cavity; when the forming rod has entered the forming cavity but is still outside the human body, the operator forces the front end of the forming rod to be in a straight state through the drainage tube body, smoothly entering the human body; when the front end of the forming rod is completely inside the human body, because of the restriction of the drainage tube body that has already entered the human body, the front end of the forming rod still maintains a straight state and continues to move along the forming cavity; when the front end of the forming rod approaches the front end of the forming cavity, the drainage tube body restricting the front end of the forming rod becomes shorter, the force that forces the front end of the forming rod to be straightened decreases, and the front end of the drainage tube body naturally curls and deforms as the forming rod is fully inserted, resembling a pig tail curl.

[0005] Preferably, the end of the forming rod is fixedly connected to an operating end, which provides a stable operating point for pushing the forming rod forward and limits the insertion limit stroke of the forming rod to prevent the front end of the forming rod from penetrating the drainage tube body.

[0006] Preferably, the radial cross-section of the forming rod is circular; the radial cross-section of the forming cavity is circular and matches the forming rod, so that the forming rod can pass through the forming cavity.

[0007] Furthermore, the inner diameter of the molding cavity is greater than the outer diameter of the molding rod; a gap is maintained between the molding cavity and the molding rod to allow the molding rod to pass through the molding cavity.

[0008] Preferably, the front end of the drainage tube is provided with a drainage side hole for drainage.

[0009] Furthermore, the molding cavity wall is provided with a pressure relief hole that communicates with the drainage tube body to reduce resistance when the molding rod is inserted. When the drainage tube body enters the tube body first, some of the human tissue fluid enters the molding cavity through the drainage side hole and the pressure relief hole, squeezing the air in the molding cavity towards the catheter connector. As the molding rod is inserted, the excess air remaining due to the insertion of the molding rod is discharged through the insertion point of the molding rod at the catheter connector. The closer the front end of the molding rod is to the front end of the drainage tube body, the less the residual tissue fluid can be discharged from the insertion point of the molding rod in time, and it can enter the drainage tube body through the pressure relief hole.

[0010] Preferably, the end of the drainage tube is inserted into the front end of the catheter connector; the end of the drainage tube extends beyond the end of the forming cavity; the end of the drainage tube and the end of the forming cavity are spatially isolated to prevent the tissue fluid drained from the drainage tube from entering the forming cavity; the catheter connector has an inclined channel inside that communicates with the end of the forming cavity; the inclined channel matches the forming rod; the operation of the forming rod and the operation of the external device of the drainage tube can avoid each other, which is beneficial to the physician's operation.

[0011] Preferably, the post-formed pigtail catheter also includes a Luer connector; the Luer connector is connected to the catheter connector to facilitate the connection of other catheters to the post-formed pigtail catheter.

[0012] Furthermore, the catheter connector has a connector cavity at its end that corresponds to the Luer connector, enabling a sealed connection between the Luer connector and the catheter connector; a sealing ring is fitted at the front end of the Luer connector to improve the sealing performance of the connection between the Luer connector and the catheter connector.

[0013] Preferably, the front end of the drainage tube is provided with a conical head to facilitate the smooth entry of the drainage tube into the human body.

[0014] The beneficial effects of this utility model are as follows: The post-formed pig tail cannula of this utility model has the following advantages: (1) This utility model provides a post-formed pig tail catheter, and ensures that no other parts besides the drainage tube body will come into contact with human tissue, effectively preventing cuts caused by implantation of existing pig tail catheters; (2) The operating end of this utility model provides a stable operating point for pushing the forming rod forward, and also limits the insertion limit stroke of the forming rod to prevent the front end of the forming rod from penetrating the drainage tube body. Attached Figure Description

[0015] Figure 1 This is a front view of the post-formed pig tail tube of this utility model; Figure 2 yes Figure 1 AA section view; Figure 3 yes Figure 2 BB section view; Figure 4 This is a perspective view of the post-formed pig tail tube of this utility model; In the figure: 1. Drainage tube body, 11. Molding cavity, 111. Pressure relief hole, 12. Drainage side hole, 13. Conical head, 2. Conduit connector, 21. Inclined channel, 3. Molding rod, 31. Operating end, 4. Luer connector, 41. Sealing ring. Detailed Implementation

[0016] Example 1: See Figure 1-4 A post-formed pigtail catheter includes a drainage tube body 1, a catheter connector 2, and a forming rod 3; the end of the drainage tube body is connected to the front end of the catheter connector 2; the wall of the drainage tube body is provided with a forming cavity 11; the forming rod 3 penetrates the catheter connector 2, inserts into the forming cavity 11, and abuts against the closed end of the front end of the forming cavity 11; the front end of the forming rod 3 is curled like a pigtail; the drainage tube body 1 enters the human body before the forming rod 3, and is restricted by human tissue; when the front end of the forming rod 3 passes through the catheter connector 2, it is restricted by the catheter connector 2 and forced into a straight state, thus smoothly entering the forming cavity 11; the forming rod 3 enters the forming cavity 11. However, while still outside the human body, the operator forces the front end of the forming rod 3 to remain straight through the drainage tube 1, allowing it to smoothly enter the human body. When the front end of the forming rod 3 is fully inside the human body, it remains straight due to the restriction of the drainage tube 1, and continues to move along the forming cavity 11. When the front end of the forming rod 3 approaches the front end of the forming cavity 11, the drainage tube 1 that restricts the front end of the forming rod 3 becomes shorter, the force that forces the front end of the forming rod 3 to straighten decreases, and the front end of the drainage tube 1 naturally curls and deforms as the forming rod 3 is fully inserted, resembling a pig's tail curl.

[0017] Compared with the prior art, this utility model provides a post-formed pig tail catheter, and ensures that no other parts besides the drainage tube body 1 will come into contact with human tissue, effectively preventing cuts caused by implantation of existing pig tail catheters.

[0018] The end of the forming rod 3 is fixedly connected to the operating end 31, which provides a stable operating point for pushing the forming rod 3 forward, and limits the insertion limit stroke of the forming rod 3 to prevent the front end of the forming rod 3 from penetrating the drainage tube body 1.

[0019] The radial cross-section of the forming rod 3 is circular; the radial cross-section of the forming cavity 11 is circular and matches the forming rod 3, so that the forming rod 3 can pass through the forming cavity 11.

[0020] The inner diameter of the forming cavity 11 is greater than the outer diameter of the forming rod 3; a gap is maintained between the forming cavity 11 and the forming rod 3 so that the forming rod 3 can pass through the forming cavity 11.

[0021] The drainage tube body 1 has a drainage side hole 12 on the front side for drainage.

[0022] The cavity wall of the molding chamber 11 is provided with a pressure relief hole 111 that communicates with the drainage tube body 1 to reduce the resistance when the molding rod 3 is inserted. When the drainage tube body 1 first enters the tube body, a part of the human tissue fluid enters the molding chamber 11 body through the drainage side hole 12 and the pressure relief hole 111. The air in the molding chamber 11 body is squeezed out towards the catheter connector 2. As the molding rod 3 is inserted, the excess air that was initially left due to the insertion of the molding rod 3 is discharged through the insertion point of the molding rod 3 at the catheter connector 2. The closer the front end of the molding rod 3 is to the front end of the drainage tube body 1, the less the residual tissue fluid can be discharged from the insertion point of the molding rod 3 in time, and it can enter the drainage tube body 1 through the pressure relief hole 111.

[0023] The end of the drainage tube body 1 is inserted into the front end of the catheter connector 2; the end of the drainage tube body 1 extends beyond the end of the forming cavity 11; the end of the drainage tube body 1 and the end of the forming cavity 11 are spatially isolated to prevent the tissue fluid drained in the drainage tube body 1 from entering the forming cavity 11; the catheter connector 2 is provided with an inclined channel 21 that communicates with the end of the forming cavity 11; the inclined channel 21 is matched with the forming rod 3; the operation of the forming rod 3 and the operation of the external device of the drainage tube body 1 can avoid each other, which is beneficial to the physician's operation.

[0024] The working process of this embodiment is as follows: The drainage tube 1 enters the human body before the forming rod 3 and is restricted by the human tissue; when the front end of the forming rod 3 passes through the catheter connector 2, it is restricted by the catheter connector 2 and forced to be in a straight state, and smoothly enters the forming cavity 11; when the forming rod 3 has entered the forming cavity 11 but is still outside the human body, the operator forces the front end of the forming rod 3 to be in a straight state through the drainage tube 1, and smoothly enters the human body; when the front end of the forming rod 3 is completely inside the human body, because of the restriction of the drainage tube 1 that has already entered the human body, the front end of the forming rod 3 still maintains a straight state and continues to move along the forming cavity 11; when the front end of the forming rod 3 is close to the front end of the forming cavity 11, the drainage tube 1 that restricts the front end of the forming rod 3 becomes shorter, the force that forces the front end of the forming rod 3 to be straightened decreases, and the front end of the drainage tube 1 naturally curls and deforms as the forming rod 3 is fully inserted, resembling a pig tail curl.

[0025] Example 2: Example 2 is basically the same as Example 1, and the similarities will not be repeated. The difference is that the post-formed pig tail catheter also includes a Luer connector 4; the Luer connector 4 is connected to the catheter connector 2 so that other catheters can be connected to the post-formed pig tail catheter.

[0026] The end of the catheter connector 2 is provided with a connector cavity corresponding to the Luer connector 4, so as to realize the airtight connection between the Luer connector 4 and the catheter connector 2; the front end of the Luer connector 4 is fitted with a sealing ring 41 to improve the sealing performance of the connection between the Luer connector 4 and the catheter connector 2.

[0027] The front end of the drainage tube 1 is provided with a conical head 13 to facilitate the smooth entry of the drainage tube 1 into the human body.

Claims

1. A post-formed pig tail catheter, characterized in that, It includes a drainage tube body, a catheter connector, and a forming rod; the end of the drainage tube body is connected to the front end of the catheter connector; the tube wall of the drainage tube body is provided with a forming cavity; the forming rod passes through the catheter connector, is inserted into the forming cavity, and abuts against the closed end of the front end of the forming cavity; the front end of the forming rod is curled like a pig's tail.

2. The post-formed pig tail catheter according to claim 1, characterized in that: An operating end is fixed to the end of the forming rod.

3. The post-formed pig tail catheter according to claim 1, characterized in that: The radial cross-section of the forming rod is circular; the radial cross-section of the forming cavity is circular and matches the forming rod.

4. The post-formed pig tail catheter according to claim 3, characterized in that: The inner diameter of the forming cavity is greater than the outer diameter of the forming rod.

5. The post-formed pig tail catheter according to claim 1, characterized in that: The drainage tube has a drainage side hole on the front side.

6. The post-formed pig tail catheter according to claim 5, characterized in that: The molding cavity wall is provided with a pressure relief hole that communicates with the drainage tube body.

7. The post-formed pig tail catheter according to claim 1, characterized in that: The end of the drainage tube is inserted into the front end of the catheter connector; the end of the drainage tube extends beyond the end of the forming cavity; the catheter connector has an inclined channel inside that communicates with the end of the forming cavity; the inclined channel matches the forming rod.

8. The post-formed pig tail catheter according to claim 1, characterized in that: It also includes Luer connectors; Luer connectors are connected to conduit connectors.

9. The post-formed pig tail catheter according to claim 8, characterized in that: The catheter connector has a connector cavity at the end that corresponds to the Luer connector; a sealing ring is fitted at the front end of the Luer connector.

10. The post-formed pig tail catheter according to claim 1, characterized in that: The front end of the drainage tube is equipped with a tapered head.

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