Abdominocentesis catheterization device

Abstract

The invention relates to the field of medical instruments, in particular to an abdominal cavity puncture catheter device. Comprising a catheter, a needle core inserted into the catheter for puncturing, a branch tube communicated with the catheter, a liquid collecting part communicated with the branch tube and used for collecting ascites, a needle seat fixedly connected with the needle core, a telescopic rod fixedly connected with the needle seat and with a changeable length, and an isolating ring fixedly connected with the telescopic rod and capable of allowing one end of a needle point of the needle core to be located therein, a port is formed in the outer wall of the circumference of one end of the needle point of the needle core, a transverse strip capable of being inserted into the port is slidably connected into the isolating ring, and an in-ring spring forcing the transverse strip to move towards the axis of the needle core is arranged in the isolating ring, so that when the isolating ring is forcibly detached, the needle core can be damaged and cannot be used for the second time.

Description

Technical Field

[0001] This application relates to the field of medical devices, and in particular to a paracentesis catheter placement device. Background Technology

[0002] Abdominal paracentesis and catheter placement involves performing abdominal puncture under ultrasound guidance to establish a drainage channel for ascites fluid aspiration and analysis. Previously, abdominal paracentesis and catheter placement was more often done using guidewire guidance, a method requiring multiple people to work together, and involving the sequential insertion of a fine needle, guidewire, dilator, and catheter into the patient's abdominal cavity at various points, making the process extremely inconvenient.

[0003] Therefore, in clinical practice, some puncture and catheterization devices that can establish a drainage channel with only one puncture are being designed. For example, an abdominal puncture and catheterization drainage device with publication number CN113679454A uses a needle core to insert the catheter into the abdominal cavity, then removes the needle core, and then drains through the branch tube of the three-way tube and uses the air pressure difference.

[0004] In response to the aforementioned technologies, in order to ensure that the needle core is not likely to cause harm to medical staff after removal and to reduce the possibility of the needle core being reused, the telescopic rod will be stretched along with the movement of the needle core, so that one end of the needle core is located in the inner ring of the isolation ring fixed to the telescopic rod. However, if the telescopic rod is damaged or removed, for example by twisting the isolation ring, the needle core can still be reused. Summary of the Invention

[0005] To further reduce the possibility of the needle core being reused, this application provides an abdominal paracentesis catheter placement device.

[0006] The abdominal paracentesis catheter placement device provided in this application adopts the following technical solution.

[0007] An abdominal paracentesis catheter placement device includes a catheter, a needle core inserted into the catheter for puncture, a branch tube connected to the catheter, a collection section connected to the branch tube for collecting ascites, a needle seat fixedly connected to the needle core, a telescopic rod fixedly connected to the needle seat and whose length can be changed, and an isolation ring fixedly connected to the telescopic rod and allowing one end of the needle tip to be inside. The outer circumference of one end of the needle tip of the needle core has a port. A crossbar that can be inserted into the port is slidably connected inside the isolation ring. An inner spring is provided inside the isolation ring to force the crossbar to move toward the axis of the needle core.

[0008] By adopting the above technical solution, when attempting to remove the isolation ring for reuse of the needle core, the horizontal bar will move synchronously with the isolation ring to damage the needle core, making it difficult for the needle core to be reused.

[0009] Optionally, an inner strip is slidably connected inside the isolation ring along its own axis. The ends of the inner strip and the crossbar that abut against each other are both set at an angle so that the inner strip can push the crossbar toward the needle core. The inner spring abuts against the end of the inner strip away from the crossbar.

[0010] By adopting the above technical solution, the small space within the isolation ring can be fully utilized.

[0011] Optionally, several ports are opened around the needle core axis, and the positions of the needle core opening ports are always located inside the catheter during the needle core puncture process.

[0012] By adopting the above technical solution, the needle core is made easier to destroy, and even when the tip of the needle core is subjected to a certain bending force during the puncture process, the tip of the needle core is not easily damaged.

[0013] Optionally, the crossbar forms blades on opposite sides, and the line connecting the two blades is perpendicular to the needle core axis.

[0014] By adopting the above technical solution, the needle core can be destroyed more easily.

[0015] Optionally, the isolation ring is provided with a silicone block for the needle core to pass through at the end away from the needle seat, and the tip of the needle core is located inside the silicone block when the telescopic rod is at its longest length.

[0016] By adopting the above technical solution, the needle tip is less likely to fall off after it is separated from the needle core, thus reducing the possibility of damage caused by the fallen needle tip.

[0017] Optionally, the needle holder includes a main body and a rod ring rotatably connected to the main body, with a telescopic rod fixedly connected to the rod ring, and the rotation axis of the rod ring aligning with the axis of the needle core.

[0018] By adopting the above technical solution, the telescopic rod is not easily damaged during the process of rotating the isolation ring to destroy the needle core, so that the telescopic rod can be recycled and reused.

[0019] Optionally, the needle holder may further include a detachable block that is detachably connected to the main body and used for fixing the needle core.

[0020] By adopting the above technical solution, the damaged needle core can be removed from the needle holder so that the needle holder can be recycled and reused.

[0021] Optionally, the split block can be inserted into the main body, and a rotating groove is formed on one side of the split block. A limiting block is formed inside the main body, which can enter the rotating groove when the main body rotates to restrict the split block from detaching.

[0022] By adopting the above technical solution, the needle core can be installed and removed, and the needle core will not easily move relative to the needle hub during the puncture and removal process.

[0023] Optionally, the silicone block is tightly fitted with a threaded ring, which is threadedly connected to the inner ring of the isolation ring.

[0024] The above technical solution allows for the removal of the silicone block.

[0025] Optionally, two horizontal bars are provided, and the moving direction of the two horizontal bars is consistent with the same radial direction as the needle core. The two horizontal bars are arc-shaped at their adjacent ends, and there is always a gap between the two horizontal bars at their adjacent ends.

[0026] By adopting the above technical solution, the newly replaced needle core can smoothly enter between the two horizontal bars, and the tip of the needle core can enter between the two horizontal bars, so that the tip of the needle core is not easily damaged.

[0027] In summary, this application includes at least the following beneficial effects.

[0028] 1. When attempting to remove the isolation ring for reuse of the needle core, the horizontal bar will move synchronously with the isolation ring to damage the needle core, making it difficult for the needle core to be reused.

[0029] 2. The telescopic rod and needle holder can be recycled and reused; only the needle core and silicone block need to be replaced, saving resources. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the main structure of this application;

[0031] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0032] Figure 3 It is a schematic diagram of the structure where two horizontal bars are close to one end and viewed along the axis of the needle core;

[0033] Figure 4 (a) is a structural schematic diagram of the main body from the side where the disassembly block is inserted, and (b) is a cross-sectional structural schematic diagram of the disassembly block located at the slot opening.

[0034] Explanation of reference numerals in the attached drawings: 1. Guide tube; 2. Needle core; 3. Branch tube; 4. Liquid collection section; 41. Rod ring; 42. Splitting block; 43. Rotary groove; 44. Limiting block; 45. Threaded ring; 5. Needle seat; 51. Telescopic rod; 52. Isolation ring; 53. Port; 54. Crossbar; 55. Inner ring spring; 56. Inner ring strip; 57. Blade edge; 58. Silicone block; 59. Main body component. Detailed Implementation

[0035] The present application will be further described in detail below with reference to the accompanying drawings.

[0036] This application discloses an abdominal paracentesis catheter placement device, referring to... Figure 1 It includes a catheter 1 that can be inserted into the patient's abdominal cavity at a designated location. The side of the catheter 1 is connected to a branch tube 3, and the branch tube 3 is connected to a collection section 4. The collection section 4 is consistent with the principle and structure of water-sealed negative pressure drainage in the background art, so it will not be described in detail here.

[0037] Reference Figure 1 The catheter 1 has a needle core 2 tightly fitted inside, which can be punctured at a positioning point in the abdominal cavity to facilitate the insertion of the catheter 1. A needle hub 5 is located at the end of the needle core 2 exposed outside the catheter 1, allowing medical personnel to move the needle core 2. The needle hub 5 is connected to several telescopic rods 51 whose length can be extended or shortened. All telescopic rods 51 are fixedly connected to the same isolation ring 52 at the end furthest from the needle hub 5. The axis of the isolation ring 52 is aligned with the axis of the needle core 2. The connection between the isolation ring 52 and the inside of the catheter 1 can be designed similarly to the prior art, using a spring, a small ball, and a limiting ring, so that when the needle hub 5 is moved, the telescopic rods 51 can be extended to their maximum length.

[0038] Reference Figure 1 and Figure 2 Two horizontal bars 54 are slidably connected to the inner circumference of the isolation ring 52 near the needle holder 5. Several ports 53 are formed around the needle tip 2 along its own axis. The horizontal bars 54 can be inserted radially into the ports 53 of the isolation ring 52, making it difficult for the needle core 2 and the isolation ring 52 to separate easily. An inner ring bar 56 is slidably connected to each of the two horizontal bars 54 within the isolation ring 52. The inner ring bar 56 moves along the axis of the isolation ring 52, abutting against the horizontal bars 54, with both abutting ends being inclined, allowing the inner ring bar 56 to push the horizontal bars 54 towards the needle core 2. An inner ring spring 55 is provided for each inner ring bar 56 within the isolation ring 52, forcing the inner ring bar 56 towards the needle holder 5.

[0039] Reference Figure 2 and Figure 3The needle holder 5 includes a main body 59, a rod ring 41 rotatably connected to the main body 59, and a splitting block 42 detachably connected to the main body 59. The needle core 2 is fixedly connected to the splitting block 42. The rotation axis of the rod ring 41 is consistent with the axis of the needle core 2. The telescopic rod 51 is fixedly connected to the rod ring 41. The crossbar 54 can be inserted into one end of the port 53, and both opposite sides are formed with cutting edges 57 so that when the isolation ring 52 is rotated, the cutting edges 57 can break and separate the needle tip of the needle core 2. The inner circumference of the isolation ring 52 away from the needle holder 5 is threaded with a threaded ring 45. The threaded ring 45 is tightly fitted with a silicone block 58. When the telescopic rod 51 is stretched to its longest position, the needle tip of the needle core 2 is located inside the silicone block 58, so that the separated needle tip of the needle core 2 is not easily dropped. Furthermore, the port 53 of the needle core 2 is always located inside the catheter 1 during the puncture process, so that the needle tip of the needle core 2 is less likely to deform after being subjected to bending force during the puncture process.

[0040] Reference Figure 3 and Figure 4 The splitting block 42 can be inserted into the needle holder 5 along the axis of the needle core 2. The splitting block 42 has a rotating slot 43. A limiting block 44 is formed on the inner wall of the needle holder 5 where the splitting block 42 is inserted. The rotating slot 43 allows the limiting block 44 to enter during the rotation of the splitting block 42. A rubber layer can be provided on the outer surface of the limiting block 44 so that after the splitting block 42 is first inserted into the main body 59, and then the splitting block 42 is rotated, the rotating slot 43 is tightly fitted onto the limiting block 44 to restrict the free rotation of the splitting block 42. After one end of the needle tip of the needle core 2 is broken, the needle core 2 can be removed from the needle holder 5 and a new needle core 2 can be installed. Furthermore, the adjacent ends of the two horizontal bars 54 are both arc-shaped, and there is a gap between the adjacent ends of the two horizontal bars 54. The cross-sectional area of ​​the two horizontal bars 54 located inside the isolation ring 52 is the largest, so that the horizontal bars 54 cannot detach from the isolation ring 52. When installing a new needle core 2, the needle tip of the needle core 2 can be inserted into the two horizontal bars 54 without being easily damaged.

[0041] The implementation principle of an abdominal paracentesis catheter placement device according to an embodiment of this application is as follows: after the puncture is completed, the needle seat 5 is pulled to remove the needle core 2 from the catheter 1. During the removal process, the telescopic rod 51 extends and reaches its maximum length. When the crossbar 54 is inserted into the port 53, the isolation ring 52 can be rotated to destroy the needle core 2 for reuse.

[0042] Then the needle holder 5 can be recycled. First, unscrew the threaded ring 45 to remove the needle tip that is wrapped with the separated needle core 2. Then rotate the splitting block 42 and move it out along the axis of the needle core 2. Then insert the new needle core 2 in an inclined position between the two horizontal bars 54, ensuring that the needle tip of the needle core 2 is between the two horizontal bars 54 without contacting them. Then keep the needle core 2 tilted and move it along its own axis. During this process, the horizontal bars 54 cannot be inserted into the port 53 of the tilted needle core 2 until the position of the port 53 of the needle core 2 passes the horizontal bar 54. Then straighten the needle core 2 so that the axis of the needle core 2 and the isolation ring 52 are aligned. Then the needle core 2 continues to move away from the needle holder 5 by a certain distance. Then move the splitting block 42 toward the main body 59 and insert it until only a small part of the splitting block 42 is exposed outside the main body 59. Then rotate the splitting block 42 so that the slot 43 is fitted onto the limiting block 44.

[0043] Then rotate the isolation ring 52 at a certain angle so that the horizontal bar 54 is aligned with the port 53 in the direction of the needle core 2 axis. Then bring the isolation ring 52 close to the needle seat 5 to complete the installation of the needle core 2.

[0044] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An abdominal paracentesis catheter placement device, comprising a catheter (1), a needle core (2) inserted into the catheter (1) for puncture, a branch tube (3) connected to the catheter (1), a collection section (4) connected to the branch tube (3) for collecting ascites, a needle seat (5) fixedly connected to the needle core (2), a telescopic rod (51) fixedly connected to the needle seat (5) and whose length can be changed, and an isolation ring (52) fixedly connected to the telescopic rod (51) and capable of housing one end of the needle tip of the needle core (2), characterized in that: The needle core (2) has a port (53) on the outer circumference of one end of the needle tip. A horizontal bar (54) that can be inserted into the port (53) is slidably connected inside the isolation ring (52). An inner spring (55) is provided inside the isolation ring (52) to force the horizontal bar (54) to move toward the axis of the needle core (2).

2. The abdominal paracentesis catheter placement device according to claim 1, characterized in that: The isolation ring (52) has an inner ring strip (56) that slides along its own axis inside. The inner ring strip (56) and the crossbar (54) are both set at an angle so that the inner ring strip (56) can push the crossbar (54) toward the needle core (2). The inner ring spring (55) abuts against the end of the inner ring strip (56) away from the crossbar (54).

3. The abdominal paracentesis catheter placement device according to claim 1, characterized in that: Several ports (53) are opened around the axis of the needle core (2), and the position of the port (53) of the needle core (2) is always inside the catheter (1) during the puncture process of the needle core (2).

4. The abdominal paracentesis catheter placement device according to claim 1, characterized in that: The horizontal bar (54) forms blades (57) on opposite sides, and the line connecting the two blades (57) is perpendicular to the axis of the needle core (2).

5. The abdominal paracentesis catheter placement device according to claim 4, characterized in that: The isolation ring (52) is provided with a silicone block (58) for the needle core (2) to pass through at the end away from the needle seat (5). When the telescopic rod (51) is at its longest length, the tip of the needle core (2) is located inside the silicone block (58).

6. The abdominal paracentesis catheter placement device according to claim 5, characterized in that: The needle holder (5) includes a main body (59) and a rod ring (41) rotatably connected to the main body (59). The telescopic rod (51) is fixedly connected to the rod ring (41), and the rotation axis of the rod ring (41) is consistent with the axis of the needle core (2).

7. The abdominal paracentesis catheter placement device according to claim 6, characterized in that: The needle holder (5) also includes a split block (42) that is detachably connected to the main body (59) and is fixedly connected to the needle core (2).

8. The abdominal paracentesis catheter placement device according to claim 7, characterized in that: The split block (42) can be inserted into the main body (59). A rotating slot (43) is formed on one side of the split block (42). A limiting block (44) is formed inside the main body (59) so that it can enter the rotating slot (43) when the main body (59) rotates to restrict the split block (42) from disengaging.

9. The abdominal paracentesis catheter placement device according to claim 5, characterized in that: The silicone block (58) is tightly fitted with a threaded ring (45), which is threadedly connected to the inner ring of the isolation ring (52).

10. The abdominal paracentesis catheter placement device according to claim 6, characterized in that: Two horizontal bars (54) are provided. The moving direction of the two horizontal bars (54) is consistent with the same radial direction as the needle core (2). The two horizontal bars (54) are arc-shaped at their close ends, and there is always a gap between the two horizontal bars (54) at their close ends.

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