Drainage auxiliary device for PTCD catheter

Abstract

The invention belongs to the technical field of medical instruments, and discloses a drainage auxiliary device for a PTCD catheter, which comprises a shell, two ends of the shell are fixedly connected with connecting pipes, a sliding plate is slidably connected in the shell, one side of the sliding plate is fixedly connected with a tension spring I, and the other side of the sliding plate is fixedly connected with a pull rope. The other end of the pull rope penetrates through the shell and is fixedly connected with a pressing plate, and the pressing plate is slidably connected with the shell. The sliding plate is fixedly connected with a sliding rod, the sliding plate is slidably connected with a sealing plate through the sliding rod, the sliding rod is sleeved with a second tension spring, the sliding rod is fixedly connected with a limiting block used for limiting the sealing plate, and the sliding plate is provided with a through hole matched with the sealing plate; the problems that in the prior art, when a PTCD catheter is used for drainage, a patient needs to manually extrude the catheter which is hard in material and short in length, labor is wasted, operation is not convenient, and meanwhile the drainage effect is poor are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a drainage assistance device for a PTCD catheter. Background Art

[0002] The PTCD tube, full name Percutaneous Transhepatic Cholangial Drainage, is an interventional treatment method for treating diseases such as obstructive jaundice and biliary tract obstruction.

[0003] When the abdominal puncture PTCD tube is used to treat obstructive jaundice, it is necessary to drain bile. However, due to the viscous bile and a lot of impurity precipitation, patients often need to manually squeeze the drainage tube for auxiliary drainage. However, the existing PTCD tube material is relatively hard, and the squeezable part is short. It is laborious and inconvenient for patients to manually squeeze, and at the same time, the drainage effect is not good.

[0004] Therefore, there is an urgent need for a drainage assistance device for a PTCD catheter to improve the drainage efficiency and reduce the burden on patients. Summary of the Invention

[0005] The present invention aims to provide a drainage assistance device for a PTCD catheter to solve the problem that in the prior art, when using a PTCD catheter for drainage, patients need to manually squeeze a catheter with a relatively hard material and a short length, which is laborious and inconvenient to operate, and at the same time, the drainage effect is not good.

[0006] To achieve the above object, the present invention provides the following technical solution:

[0007] The basic technical solution provided by the present invention is: a drainage assistance device for a PTCD catheter, including a housing. The housing is a hollow structure. Both ends of the housing are fixedly connected with connecting pipes. A slide plate is slidably connected inside the housing. The slide plate divides the housing into a first cavity and a second cavity. One side of the slide plate is fixedly connected with a first tension spring, and the other end of the first tension spring is fixedly connected with the housing. The other side of the slide plate is fixedly connected with a pull rope. The other end of the pull rope penetrates through the housing and is fixedly connected with a pressing plate. The housing is provided with a chute. The pressing plate is fixedly connected with a slider. The pressing plate and the housing are slidably connected through the slider and the chute. The slide plate is fixedly connected with a sliding rod. The slide plate is slidably connected with a sealing plate through the sliding rod. A second tension spring is sleeved on the sliding rod. The second tension spring is located between the slide plate and the sealing plate. The sliding rod is fixedly connected with a limiting block for limiting the sealing plate. The slide plate is provided with a through hole, and the sealing plate is adapted to the through hole.

[0008] The principle of the basic technical solution is: disconnect the PTCD catheter and connect the two sections of the PTCD catheter to the connecting tubes respectively, wherein the PTCD catheter at one end of the cavity is connected to the patient to draw out bile, and the PTCD catheters at the two ends of the cavity are connected to the outside to discharge bile; the connecting tube close to the tension spring 1 is used to connect the sliding pressure plate in the direction close to the connection end of the tension spring 1 and the shell, and the pressure plate pulls the slide plate through the pull rope, so that the slide plate drives the sealing plate to move in the direction away from the tension spring 1, and at the same time stretches the tension spring 1, the volume of the space between the cavity 1 and the PTCD catheter becomes larger, but the weight of the internal gas remains unchanged, so the pressure becomes smaller, thereby generating negative pressure to absorb The bile is drawn in, thereby achieving the drainage effect; after the pressure plate is released, the pressure spring 1 recovers its original length and drives the slide plate to move in the direction close to the tension spring 1, thereby driving the slide plate back to the initial position. During this process, the volume of the space between the cavity 1 and the PTCD catheter gradually decreases, but the weight of the internal gas remains unchanged, so the pressure tends to increase. When the pressure of the combined space of the cavity 1 and the PTCD catheter is greater than the pressure of the combined space of the cavity 2 and the PTCD catheter, the sealing plate moves in the direction close to the limit block until it fits with the limit block, and at the same time stretches the tension spring until the sealing plate is separated from the through hole, causing the cavity 1 to be connected with the cavity 2, thereby preventing bile reflux.

[0009] The beneficial effects of the basic technical solution are: by pulling the pressure plate, negative pressure can be generated inside it to achieve the drainage effect, and the drainage intensity can be adjusted by adjusting the distance by which the pressure plate is pulled. It saves time and effort, is easy to operate, has a good drainage effect, and is conducive to patients making adaptive adjustments according to their own conditions or doctor's orders. After each drainage is completed, the pressure plate is released and the tension spring can drive the slide plate and the pressure plate back to the initial position. At the same time, the design of the sealing plate and the through hole prevents the problem of bile reflux, thereby improving the drainage effectiveness of the device, and solving the problem that the prior art uses PTCD catheter drainage, which is laborious and inconvenient to operate, and the drainage effect is not good.

[0010] Preferably, the sliding plate is fixedly connected to extension plates on all four sides, and the extension plates are in contact with the inner wall of the shell.

[0011] Through the above arrangement, the arrangement of the extension plate increases the contact area between the slide plate and the inner wall of the shell, thereby improving the sealing between the two.

[0012] Preferably, a pulley is rotatably connected inside the housing, and the pulley is adapted to the pull rope.

[0013] Through the above arrangement, the pull rope passes around the pulley and then passes through the shell, which not only helps to reduce the patient's force, but also reduces the friction between the pull rope and the shell, thereby increasing its service life and having higher reliability.

[0014] Preferably, the housing is fixedly connected with a fixing plate.

[0015] With the above settings, the patient can hold the fixing plate with the thumb and use it and the four fingers to pull the pressing plate, thus providing convenience for the patient.

[0016] Preferably, the outer surfaces of the fixing plate and the pressing plate are rough surfaces.

[0017] With the above settings, the setting of the rough surface increases the friction between it and the patient's fingers, thus improving the stability and reliability during the pressing process.

[0018] Preferably, the connecting pipe is an elastic pipe, and the connecting pipe is connected with a fastening sleeve by a thread.

[0019] With the above settings, the PTCD catheter is connected to it by sliding into the connecting pipe, and the outer diameter of the PTCD catheter is slightly larger than the inner diameter of the connecting pipe. Therefore, it causes the connecting pipe to expand. By rotating the fastening sleeve to sleeved on the threaded part of the connecting pipe, the connecting pipe is compressed, and then the PTCD catheter is firmly fixed at the connecting pipes at both ends of the housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 One of the structural schematic diagrams of a drainage assistance device for a PTCD catheter according to the present invention;

[0021] Figure 2 Two of the structural schematic diagrams of a drainage assistance device for a PTCD catheter according to the present invention;

[0022] Figure 3 is Figure 2 The cross-sectional view at A-A in

[0023] Figure 4 The partial structural schematic diagram of a drainage assistance device for a PTCD catheter according to the present invention;

[0024] Figure 5 The structural schematic diagram of some components of a drainage assistance device for a PTCD catheter according to the present invention;

[0025] Figure 6 The connection schematic diagram of a drainage assistance device for a PTCD catheter and a catheter according to the present invention;

[0026] 1. Housing; 101. Chamber one; 102. Chamber two; 2. Connecting pipe; 3. Fastening sleeve; 4. Pressing plate; 5. Slide block; 6. Slide groove; 7. Fixing plate; 8. Slide plate; 9. Tensile spring one; 10. Pulling rope; 11. Pulley; 12. Slide rod; 13. Limiting block; 14. Tensile spring two; 15. Sealing plate; 16. Extension plate; 17. Through hole. DETAILED DESCRIPTION OF THE INVENTION

[0027] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments:

[0028] As Figures 1 to 6 shown, a drainage assistance device for a PTCD catheter includes a housing 1. The housing 1 is a hollow structure. Both ends of the housing 1 are fixedly connected with connecting pipes 2. The connecting pipes 2 are elastic pipes. The connecting pipes 2 are threadedly connected with fastening sleeves 3. A sliding plate 8 is slidably connected inside the housing 1. The sliding plate 8 divides the housing 1 into a first cavity 101 and a second cavity 102. Extension plates 16 are fixedly connected to the periphery of the sliding plate 8. The extension plates 16 are in contact with the inner wall of the housing 1. One side of the sliding plate 8 is fixedly connected with a first tension spring 9. The other end of the first tension spring 9 is fixedly connected with the housing 1. The other side of the sliding plate 8 is fixedly connected with a pull rope 10. A pulley 11 is rotatably connected inside the housing 1. The pulley 11 is adapted to the pull rope 10. The other end of the pull rope 10 penetrates the housing 1 and is fixedly connected with a pressing plate 4. The housing 1 is provided with a sliding groove 6. The pressing plate 4 is fixedly connected with a slider 5. The pressing plate 4 and the housing 1 are slidably connected through the slider 5 and the sliding groove 6. The housing 1 is fixedly connected with a fixing plate 7. The outer surfaces of the fixing plate 7 and the pressing plate 4 are rough surfaces. The sliding plate 8 is fixedly connected with a sliding rod 12. The sliding plate 8 is slidably connected with a sealing plate 15 through the sliding rod 12. A second tension spring 14 is sleeved on the sliding rod 12. The second tension spring 14 is located between the sliding plate 8 and the sealing plate 15. The sliding rod 12 is fixedly connected with a limiting block 13 for limiting the sealing plate 15. The sliding plate 8 is provided with a through hole 17. The sealing plate 15 is adapted to the through hole 17.

[0029] The specific implementation process is as follows:

[0030] When using the present invention, first insert the output end of the PTCD catheter into the connecting pipe 2 near the cavity 101. The threaded end of the connecting pipe 2 of the PTCD catheter expands slightly. By rotating the fastening sleeve 3, screw it onto the thread at the front end of the connecting pipe 2, and compress the front end of the connecting pipe 2 to tightly connect it to the PTCD catheter. Then, connect the drain pipe to the connecting pipe 2 near the cavity 102 in this way. When manual auxiliary drainage is required, the user can hold the fixing plate 7 with the thumb and use the other fingers to pull the pressing plate 4 to pull the pull rope 10. The pull rope 10 pulls the sliding plate 8 to move, thus increasing the volume of the cavity 101. Since the mass of the gas inside remains unchanged, the pressure inside decreases and a negative pressure is generated, thereby achieving the drainage effect. The drainage intensity can be adjusted according to the distance the slider 5 slides. The longer the distance of each slide, the greater the negative pressure generated and the greater the drainage intensity. After pressing the slider 5 once and then releasing it, the tension spring 9 drives the slider 5 back to the initial position to repeatedly generate negative pressure. During the process of the slider 5 restoring, the pressure in the cavity 101 tends to increase. When the pressure inside is greater than the pressure in the cavity 102, the gas in the cavity 101 pushes the sealing plate 15 to move and stretch the tension spring 14 until the slider 5 returns to the initial position. After that, the volume of the cavity 101 no longer changes and the pressure inside also no longer changes. The tension spring 14 can then pull the sealing plate 15 to seal the through hole 17. At the same time, when the sliding plate 8 moves in the direction close to the tension spring 1, that is, when the sliding plate 8 returns to the initial position, the bile drained out flows out along the through hole 17.

[0031] The above are only the embodiments of the present invention. Specific technical solutions or common knowledge such as characteristics well known in the art are not described in detail here. It should be noted that for those skilled in the art, without departing from the technical solution of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention. These will not affect the implementation effect of the present invention and the practicality of the patent. The protection scope required by this application should be based on the content of its claims, and the specific implementation manners described in the specification can be used to explain the content of the claims.

Claims

1. A drainage assisting device for a PTCD catheter, characterized in that: It includes a housing (1), the housing (1) is of a hollow structure, both ends of the housing (1) are fixedly connected with connecting pipes (2), a sliding plate (8) is slidably connected inside the housing (1), the sliding plate (8) divides the housing (1) into a first cavity (101) and a second cavity (102), one side of the sliding plate (8) is fixedly connected with a first tension spring (9), the other end of the first tension spring (9) is fixedly connected with the housing (1), the other side of the sliding plate (8) is fixedly connected with a pull rope (10), the other end of the pull rope (10) penetrates through the housing (1) and is fixedly connected with a pressing plate (4), and the pressing plate (4) is slidably connected with the housing (1); The sliding plate (8) is fixedly connected with a sliding rod (12), the sliding plate (8) is slidably connected with a sealing plate (15) through the sliding rod (12), a second tension spring (14) is sleeved on the sliding rod (12), the second tension spring (14) is located between the sliding plate (8) and the sealing plate (15), the sliding rod (12) is fixedly connected with a limiting block (13) for limiting the sealing plate (15), and the sliding plate (8) is provided with a through hole (17), and the sealing plate (15) is adapted to the through hole (17).

2. The drainage assistance device for a PTCD catheter according to claim 1, wherein: Extension plates (16) are fixedly connected to the periphery of the sliding plate (8), and the extension plates (16) are attached to the inner wall of the housing (1).

3. The drainage assistance device for a PTCD catheter according to claim 1, characterized in that: A pulley (11) is rotatably connected inside the housing (1), and the pulley (11) is adapted to the pull rope (10).

4. The drainage assistance device for a PTCD catheter according to claim 1, characterized in that: The housing (1) is provided with a chute (6), the pressing plate (4) is fixedly connected with a slider (5), and the slider (5) is slidably connected with the chute (6).

5. The drainage assistance device for a PTCD catheter according to claim 1, wherein: The housing (1) is fixedly connected with a fixing plate (7).

6. The drainage assistance device for a PTCD catheter according to claim 5, wherein: The outer surfaces of the fixing plate (7) and the pressing plate (4) are rough surfaces.

7. The drainage assistance device for a PTCD catheter according to claim 1, characterized in that: The connecting pipe (2) is an elastic pipe, and the connecting pipe (2) is threadedly connected with a fastening sleeve (3).

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