PTCD drainage tube anti-disconnection joint

Abstract

The utility model relates to drainage tube anti -disengaging joint technical field especially PTCD drainage tube anti -disengaging joint, including drainage tube, the outside end of drainage tube sets up outer thread connector, outer thread connector adapts screwing inner thread hole, inner thread hole top end connects the catheter, and the catheter connects the drainage bag, the outer thread end of outer thread connector sets up the protrusion, and the protrusion adapts the recess, and the recess sets up in the end of the thread groove of inner thread hole, this joint can accurate control strength, strengthens the connection between outer thread connector and screwing inner thread hole simultaneously, prevents the loosening or falling off between both.

Description

Technical Field

[0001] This utility model relates to the technical field of drainage tube anti-detachment connectors, and in particular to a PTCD drainage tube anti-detachment connector. Background Technology

[0002] The PTCD drainage tube is a drainage tube used in percutaneous hepatic cholangiography. In patients with acute cholangitis, especially severe cases, the PTCD drainage tube can drain purulent bile from the bile duct. When using it, a drainage bag is needed to collect the drained bile, thereby achieving the function of drainage and decompression.

[0003] Typically, a PTCD drainage tube has a connector at its external end, while the catheter connected to the drainage bag has a connector at its other end. Simply inserting the connector into the drainage tube's connector is quick and easy, but the connection between the drainage tube and the drainage bag is not very secure. During patient movement, clothing pulling, or other activities, the connection can easily loosen or even detach, causing bile leakage or bacterial infection at the connection point. Some PTCD drainage tubes are fixed to the catheter on the drainage bag by screwing them together. However, different medical personnel have varying degrees of control over the tightening force. Excessive tightening force can cause the drainage tube material to crack or deform, affecting its normal function. Insufficient tightening force can lead to poor sealing between the drainage tube and the connection point, causing bile leakage, increasing the risk of infection, and even causing the drainage bag to detach.

[0004] Therefore, this application provides a PTCD drainage tube anti-dislodgement connector to solve the problems mentioned in the background art. Utility Model Content

[0005] The purpose of this utility model is to provide a PTCD drainage tube anti-detachment connector to solve the problems of poor control of tightening force, loosening or falling off of the drainage tube during the existing threaded connection between the PTCD drainage tube and the drainage bag.

[0006] To solve the above-mentioned technical problems, this utility model provides a PTCD drainage tube anti-dislodgement connector, including a drainage tube, the rear end of which is inserted into the human body, and an external threaded connector at the front end of the drainage tube. The external threaded connector is adapted to an internal threaded hole, which is located at the front end of the catheter. The rear end of the catheter is integrally formed and connected to the drainage bag. A protrusion is provided on the external threaded body of the external threaded connector near the end of the drainage tube. The protrusion is adapted to a groove, which is located on the thread groove body of the internal threaded hole near the end of the catheter.

[0007] A further improvement of this utility model is that the threaded groove is adapted to the external thread, and a protrusion is provided at the end of the external thread. The protrusion has the same shape as the external thread and protrudes 0.05-0.2mm higher than the external thread.

[0008] A further improvement of this utility model is that a female buckle is provided on the outer side wall of the protrusion, and the female buckle is an inner cavity, the inner diameter of the opening of the inner cavity is smaller than the inner diameter of the cavity.

[0009] A further improvement of this utility model is that a groove is provided at the end of the threaded groove, and a ramp is provided between the groove and the threaded groove, with a ramp angle of 15°-30°.

[0010] A further improvement of this utility model is that a male buckle is provided on the side wall opposite to the groove and the threaded groove. The male buckle has a mushroom-shaped structure and is adapted to snap onto the female buckle.

[0011] A further improvement of this utility model is that the drainage tube and the external threaded connector are integrally injection molded, and the internal threaded hole and the conduit are also integrally injection molded.

[0012] A further improvement of this utility model is that the drainage tube and the inner cavity of the external threaded connector are interconnected, and the cavity between the internal threaded tube and the drainage tube is interconnected.

[0013] By adopting the above technical solution, this utility model has the following beneficial effects:

[0014] 1. This utility model provides a PTCD drainage tube anti-dislodgement connector. The protrusion on the external threaded connector is adapted to the groove of the internal threaded hole. When medical personnel tighten the connector, a "click" sound will be heard when the protrusion is inserted into the groove, and at the same time, there will be a feeling that it cannot be tightened. This indicates that it has been tightened and further tightening should be stopped. This can avoid excessive or insufficient force during the tightening process. At the same time, the protrusion is adapted to be inserted into the groove, which further improves the stability of the connection between the external threaded connector and the internal threaded hole and reduces the risk of catheter dislodgement.

[0015] 2. The present invention provides a PTCD drainage tube anti-detachment connector, in which the male thread is fitted into the female thread, making the protrusion more stable in the fitting groove, further improving the stability of the two connectors after tightening, preventing the external thread connector from loosening or falling off, and ensuring good sealing at the connection.

[0016] 3. The present invention provides a PTCD drainage tube anti-detachment connector. The ramp makes the threaded groove and the groove form a transitional connection, which makes it easy to unscrew the internal threaded hole in the opposite direction. When the drainage bag needs to be replaced, just start to screw in the opposite direction with a little force. The male and female threads will separate, the protrusion will slide out of the groove along the ramp, and then screw normally until the internal threaded hole and the external threaded connector separate. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of an anti-detachment connector for a PTCD drainage tube;

[0019] Figure 2 for Figure 1 Schematic diagram of the structure of a threaded connector;

[0020] Figure 3 This is a magnified view of a portion of point A on the external threaded connector.

[0021] Figure 4 This is a cross-sectional view of an internally threaded hole;

[0022] Figure 5 This is a magnified view of a portion of point B on the internal threaded hole.

[0023] Reference numerals in the attached diagram: 1. Drainage tube; 2. External threaded connector; 21. External thread; 22. Protrusion; 23. Female thread; 3. Internal threaded hole; 31. Thread groove; 32. Ramp; 33. Groove; 34. Male thread; 4. Conduit. Detailed Implementation

[0024] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0025] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] The present invention will be further explained below with reference to specific embodiments.

[0028] like Figures 1-5 As shown, this embodiment provides a PTCD drainage tube anti-dislodgement connector, including a drainage tube 1. The rear end of the drainage tube 1 is inserted into the human body, and the front end of the drainage tube 1 is provided with an external threaded connector 2. The external threaded connector 2 is adapted to an internal threaded hole 3, which is located at the front end of a catheter 4). The rear end of the catheter 4 is integrally formed and connected to the drainage bag. A protrusion 22 is provided on the external thread 21 body of the external thread connector 2 near the end of the drainage tube 1. The protrusion 22 is adapted to a groove 33, which is located on the thread groove 31 body of the internal threaded hole 3 near the end of the catheter 4. The drainage tube 1 and the catheter 4 on the drainage bag are adapted to each other through the external threaded connector 2 and the internal threaded hole 3. The screw connection is tightened and sealed. The external thread 21 of the external thread connector 2 is an arc-shaped raised thread. A protrusion 22 is provided at the end of the external thread 21 near the drainage tube 1. A groove 33 is provided at the corresponding position of the thread groove 31 of the internal thread hole 3. When the internal thread hole 3 is screwed into the external thread connector 2, a "click" sound will be heard when the protrusion 22 is inserted into the groove 33 during the screwing process. At the same time, there is a feeling that it cannot be screwed in, indicating that it has been tightened. This avoids excessive or insufficient force during the screwing process. At the same time, the protrusion 22 fits into the groove 33, which further improves the stability of the connection between the external thread connector 2 and the internal thread hole 3 and reduces the risk of the conduit 4 falling off.

[0029] like Figures 3-4As shown, in this embodiment, the threaded groove 31 is adapted to the external thread 21. A protrusion 22 is provided at the end of the external thread 21. The protrusion 22 has the same shape as the external thread 21, and its arc surface is 0.05mm-0.2mm higher than that of the external thread 21. A ramp 32 is provided at the screw-in end of the threaded groove 31, and a groove 33 is provided at the end of the ramp 32. The angle between the bottom wall of the groove 33 and the bottom wall of the ramp 32 is 15°-30°. The groove 33 is 0.05mm-0.2mm deeper than the threaded groove 31. The groove 33 is adapted to the protrusion 22; specifically, during the screwing process, the protrusion 22 at the end of the external thread 21 is adapted to the groove 33 at the end of the thread groove 31, which will produce a sound and be clearly felt by hand, which can serve as an indication that the screwing is finished. At the same time, the protrusion 22 is inserted into the groove 33 to lock and prevent the threads from loosening. The ramp 32 makes the groove 33 and the thread groove 31 transition to a certain angle, which is 30°, so that the protrusion 22 can be pushed out of the groove 33 along the ramp 32.

[0030] like Figures 1-5 As shown, in this embodiment, a female buckle 23 is provided on the outer wall of the protrusion 22. The female buckle 23 is an inner cavity, and the inner diameter of the opening of the inner cavity is smaller than the inner diameter of the cavity. A male buckle 34 is provided on the side wall of the groove 33. The male buckle 34 is a mushroom-shaped structure and is adapted to engage with the female buckle 23. Specifically, the hole diameter of the female buckle 23 is fixed, while the male buckle 34 is made of polyethylene material with a certain hardness and elasticity. When the protrusion 22 is adapted to engage with the groove 33, the mushroom head of the male buckle 34 retracts under pressure and engages with the hole of the female buckle 23, further fixing the connection between the external thread connector 2 and the internal thread hole 3, and better preventing loosening or falling off between the two. When it is necessary to open, the starting force of the reverse rotation is slightly larger, so that the protrusion 22 is disengaged from the groove 33, and the female buckle 23 and the male buckle 34 are separated. Then, the external thread connector 2 and the internal thread hole 3 can be rotated normally until they are separated.

[0031] like Figure 1 As shown, in this embodiment, the drainage tube 1 and the external threaded connector 2 are integrally injection molded, and the internal threaded hole 3 and the conduit 4 are also integrally injection molded; the inner cavities of the drainage tube 1 and the external threaded connector 2 are interconnected, and the cavities between the internal threaded hole 3, the conduit 4, and the drainage tube are interconnected; specifically, the integral injection molding of the drainage tube 1 and the external threaded connector 2, and the internal threaded hole 3 and the conduit 4 improves the sealing between the drainage tube 1 or the conduit 4 and the external threaded connector 2 or the internal threaded hole 3, and after connection, the drainage tube 1 and the conduit 4 are interconnected, allowing the drainage fluid to flow unobstructed to the drainage bag.

[0032] This utility model provides a working principle for a PTCD drainage tube anti-dislodgement connector:

[0033] When in use, medical staff place the PTCD drainage tube 1 into the patient's body, leaving part of the drainage tube 1 outside the body. The external end of the drainage tube 1 is connected to the external threaded connector 2. Simply connect the internal threaded hole 3 on the catheter 4 connected to the drainage bag to the external threaded connector 2. Hold the end of the drainage tube 1 with your left hand and the end of the catheter 4 with your right hand. Twist the internal threaded hole 3 clockwise into the external threaded connector 2. When you hear a "click" sound and feel obvious resistance in your right hand, it means you have reached the end point. Stop twisting. At this time, the protrusion 22 fits into the groove 33, and the male thread 34 fits into the female thread 23, creating a double lock. This makes the connection between the internal threaded hole 3 and the external threaded connector 2 more secure, preventing them from loosening or falling off.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A PTCD drainage tube anti-detachment connector, characterized in that, It includes a drainage tube (1), the rear end of which is inserted into the human body, and an external threaded connector (2) is provided at the front end of the drainage tube (1). The external threaded connector (2) is adapted to an internal threaded hole (3). The internal threaded hole (3) is located at the front end of the catheter (4). The rear end of the catheter (4) is integrally formed and connected with the drainage bag. A protrusion (22) is provided on the external thread (21) body of the external threaded connector (2) near the end of the drainage tube (1). The protrusion (22) is adapted to a groove (33). The groove (33) is located on the end of the internal threaded hole (3) near the end of the thread groove (31) body near the catheter (4).

2. The PTCD drainage tube anti-detachment connector according to claim 1, characterized in that, A protrusion (22) is provided at the rear end of the external thread (21). The protrusion (22) has the same shape as the external thread (21) and protrusion (22) is 0.05mm-0.2mm higher than the external thread (21).

3. The PTCD drainage tube anti-dislodgement connector according to claim 1, characterized in that, A female buckle (23) is provided on the outer wall of the protrusion (22). The female buckle (23) is an inner cavity, and the inner diameter of the opening of the inner cavity is smaller than the inner diameter of the cavity.

4. The PTCD drainage tube anti-detachment connector according to claim 1, characterized in that, A groove (33) is provided at the end of the threaded groove (31), and a ramp (32) is provided between the groove (33) and the threaded groove (31), with an angle of 15°-30°.

5. The PTCD drainage tube anti-dislodgement connector according to claim 1, characterized in that, A male buckle (34) is provided on the side wall opposite to the groove (33) and the threaded groove (31). The male buckle (34) has a mushroom-shaped structure and is adapted to snap onto the female buckle (23).

6. The PTCD drainage tube anti-dislodgement connector according to claim 1, characterized in that, The drainage tube (1) and the external threaded connector (2) are integrally injection molded, and the internal threaded hole (3) and the conduit (4) are also integrally injection molded.

7. The PTCD drainage tube anti-dislodgement connector according to claim 1, characterized in that, The drainage tube (1) and the external threaded connector (2) are interconnected, and the internal threaded hole (3), the conduit (4), and the drainage tube are interconnected.

Images