Trocar cut-off device for hemodialysis

Abstract

The utility model provides a trocar cut-off device for hemodialysis, which comprises a sleeve shell, the top of the sleeve shell is provided with a sliding chute, the side surface of the sleeve shell is fixedly provided with a positioning plate, and the top of the positioning plate is provided with a limiting groove; and the rotating block is rotationally connected to the top of the inner side face of the sleeve shell, and an upper eccentric hole is formed in the rotating block. According to the trocar cut-off device for hemodialysis, the limiting plate is inserted into the inner side face of the limiting groove, the rotating block and the sleeve shell can be limited, and therefore the upper eccentric hole and the lower eccentric hole can be always kept in a through state, the limiting plate is pulled out of the inner side face of the limiting groove, and the trocar cut-off device for hemodialysis is convenient to use. And at the moment, the rotating block is driven to rotate through the elasticity of the torsional spring, so that the upper eccentric hole and the lower eccentric hole can be always located in staggered positions, and the stability of the flow intercepting structure is improved.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a shunt device for hemodialysis. Background Technology

[0002] When patients undergo hemodialysis treatment, a dialysis cannula is required. To prevent blood from flowing out when the dialysis cannula is being replaced with a syringe or dialysis tubing, which could pose risks of infection and bleeding to both medical staff and the patient, a blood-stopping device is used to stop the flow of blood.

[0003] A prior art dialysis cannula consists of a steel needle fixed to the lower end of a needle holder, an anti-puncture component, and a needle tube connector detachably mounted at the lower end of the anti-puncture component. A flow-blocking component is located at the lower end of the needle tube connector, allowing manual control of the opening and closing of the internal fluid channel. A flexible tube is installed at the lower end of the flow-blocking component, and a needle sheath is located at the lower end of the flexible tube. This invention controls the flow and closing of the flow-blocking component by rotating an upper and lower rotating block, effectively preventing blood splashing during dialysis treatment and protecting medical personnel. It has a simple structure, is easy to use, has low operational risk, and will not cause skin damage.

[0004] However, the throttling structure of this cannula lacks a limiting structure. When the cannula is left on the patient, the throttling structure is prone to rotation due to the patient's movement, which can lead to the inability to achieve the throttling effect and reduce the stability of the throttling structure.

[0005] Therefore, it is necessary to provide a hemodialysis cannula shut-off device to solve the above-mentioned technical problems. Utility Model Content

[0006] This invention provides a flow-stopping device for hemodialysis cannula needles, which solves the problem that the lack of a limiting structure easily causes the flow-stopping structure to rotate, reducing the stability of the flow-stopping.

[0007] To solve the above-mentioned technical problems, this utility model provides a hemodialysis cannula shut-off device, comprising:

[0008] A housing, wherein a sliding groove is provided on the top of the housing, and a positioning plate is fixedly installed on the side of the housing, and a limit groove is provided on the top of the positioning plate;

[0009] A rotating block is rotatably connected to the top of the inner side of the housing. The rotating block has an upper eccentric hole inside and a groove on its outer side. A torsion spring is provided on the inner side of the groove. A rotating plate is fixedly installed on the side of the rotating block. A sliding plate is slidably connected inside the rotating block. A pulling plate is fixedly installed on the top of the sliding plate. A limit plate is fixedly installed on the bottom of the sliding plate.

[0010] A fixed block is fixedly installed on the inner side of the casing, and the fixed block has a lower eccentric hole inside.

[0011] Preferably, the rotating plate is disposed on the top of the housing and located on the inner side of the slide groove.

[0012] Preferably, the rotating block is disposed on top of the fixed block.

[0013] Preferably, a needle connector is fixedly installed on the top of the rotating block, and a flexible tube is fixedly installed on the bottom of the fixed block.

[0014] Preferably, one end of the torsion spring is fixedly installed on the inner side of the groove, and the other end of the torsion spring is fixedly installed on the inner side of the housing.

[0015] Preferably, the interior of the lower eccentric hole communicates with the interior of the flexible tube, and the interior of the needle connector communicates with the interior of the upper eccentric hole.

[0016] Preferably, a magnetic plate is fixedly installed at the bottom of the inner side of the limiting groove, and a metal plate is fixedly installed at the bottom of the limiting plate.

[0017] Compared with related technologies, the hemodialysis cannula shut-off device provided by this utility model has the following beneficial effects:

[0018] This utility model provides a flow-stopping device for a hemodialysis cannula. By inserting a limiting plate into the inner side of the limiting groove, the device can limit the movement between the rotating block and the casing, thereby ensuring that the upper and lower eccentric holes remain in a continuous state. When the limiting plate is removed from the inner side of the limiting groove, the rotating block is rotated by the elasticity of the torsion spring, thus ensuring that the upper and lower eccentric holes are always in a staggered position, thereby increasing the stability of the flow-stopping structure. Attached Figure Description

[0019] Figure 1 A schematic diagram of the structure of a first embodiment of a hemodialysis cannula shut-off device provided by this utility model;

[0020] Figure 2 for Figure 1 The diagram shows a cross-sectional view of the casing.

[0021] Figure 3 for Figure 1 The enlarged schematic diagram of part A shown below;

[0022] Figure 4 This is a schematic diagram of the second embodiment of a hemodialysis cannula shut-off device provided by the present invention;

[0023] Figure 5 for Figure 4 The diagram shows the bottom structure of the limiting plate.

[0024] The following are the labels in the diagram: 1. Sleeve, 11. Slide groove, 12. Positioning plate, 13. Limiting groove, 2. Rotating block, 21. Upper eccentric hole, 22. Groove, 23. Rotating plate, 24. Slide plate, 25. Limiting plate, 26. Pulling plate, 3. Torsion spring, 4. Fixed block, 41. Lower eccentric hole, 42. Hose, 5. Needle connector, 6. Metal plate, 7. Magnetic plate. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] First Embodiment

[0027] Please refer to the following: Figure 1 , Figure 2 , Figure 3 ,in, Figure 1 A schematic diagram of the structure of a first embodiment of a hemodialysis cannula shut-off device provided by this utility model; Figure 2 for Figure 1 The diagram shows a cross-sectional view of the casing. Figure 3 for Figure 1 The enlarged schematic diagram of part A is shown. A hemodialysis cannula needle shut-off device includes: a housing 1, the top of the housing 1 having a sliding groove 11, a positioning plate 12 fixedly installed on the side of the housing 1, and a limit groove 13 formed on the top of the positioning plate 12;

[0028] Rotating block 2 is rotatably connected to the top of the inner side of the casing 1. The rotating block 2 has an upper eccentric hole 21 inside and a groove 22 on the outer side. A torsion spring 3 is provided on the inner side of the groove 22. A rotating plate 23 is fixedly installed on the side of the rotating block 2. A sliding plate 24 is slidably connected inside the rotating block 23. A pulling plate 26 is fixedly installed on the top of the sliding plate 24 and a limiting plate 25 is fixedly installed on the bottom of the sliding plate 24.

[0029] Fixed block 4 is fixedly installed on the inner side of the housing 1, and the fixed block 4 has a lower eccentric hole 41 inside.

[0030] Rotating block 2 and fixed block 4 are arranged vertically. A groove 22 is opened on the outer side of rotating block 2 for mounting torsion spring 3 during use.

[0031] When the upper eccentric hole 21 and the lower eccentric hole 41 are aligned, the medicine or blood can flow. When the upper eccentric hole 21 and the lower eccentric hole 41 are misaligned, the medicine or blood can be blocked.

[0032] The rotating plate is disposed on the top of the housing 1 and located on the inner side of the slide groove 11.

[0033] The opening of the slide 11 can limit the range of rotation of the rotating block 2, and prevent the rotation angle from being too large.

[0034] The rotating block 2 is positioned on top of the fixed block 4.

[0035] A needle connector 5 is fixedly installed on the top of the rotating block 2, and a flexible tube 42 is fixedly installed on the bottom of the fixed block 4.

[0036] One end of the torsion spring 3 is fixedly installed on the inner side of the groove 22, and the other end of the torsion spring 3 is fixedly installed on the inner side of the housing 1.

[0037] The interior of the lower eccentric hole 41 is connected to the interior of the hose 42, and the interior of the needle connector 5 is connected to the interior of the upper eccentric hole 21.

[0038] The working principle of the hemodialysis cannula shut-off device provided by this utility model is as follows:

[0039] When using the device, if it is necessary to make the flow blocking device open, the user can rotate the rotating plate 23, which will cause the rotating block 2 to rotate on the inner side of the housing 1 until one side of the rotating plate 23 rotates to one end of the inner side of the slide groove 11. At this time, the rotating block 2 rotates, which can cause the torsion spring 3 to store force. At this time, the upper eccentric hole 21 and the lower eccentric hole 41 are connected. The user can then push the pull plate 26, which will cause the pull plate 26 to slide the slide plate 24 inside the rotating plate 23. This will cause the bottom of the rotating plate 23 to drive the limiting plate 25 to be inserted into the inner side of the limiting groove 13, thus limiting the rotating block 2 and keeping the upper eccentric hole 21 and the lower eccentric hole 41 connected.

[0040] When flow interception is required, the user only needs to pull the pull plate 26 to make the slide plate 24 and the limiting plate 25 slide out from the inner side of the limiting groove 13. Then, the elasticity of the torsion spring 3 can drive the rotating block 2 to rotate, thereby causing the upper eccentric hole 21 and the lower eccentric hole 41 to be misaligned, thus intercepting the flow.

[0041] Compared with related technologies, the hemodialysis cannula shut-off device provided by this utility model has the following beneficial effects:

[0042] By inserting the limiting plate 25 into the inner side of the limiting groove 13, the rotating block 2 and the housing 1 can be limited, so that the upper eccentric hole 21 and the lower eccentric hole 41 can always be in a continuous state. When the limiting plate 25 is removed from the inner side of the limiting groove 13, the rotating block 2 is rotated by the elasticity of the torsion spring 3, so that the upper eccentric hole 21 and the lower eccentric hole 41 are always in a staggered position, which increases the stability of the interception structure.

[0043] Second Embodiment

[0044] Please refer to the following: Figure 4 and Figure 5 Based on the first embodiment of this application which provides a cannula shut-off device for hemodialysis, the second embodiment of this application proposes another cannula shut-off device for hemodialysis. The second embodiment is merely a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the separate implementation of the first embodiment.

[0045] Specifically, the difference between the second embodiment of this application and the hemodialysis cannula needle flow control device is that, in the hemodialysis cannula needle flow control device, a magnetic plate 7 is fixedly installed at the bottom of the inner side of the limiting groove 13, and a metal plate 6 is fixedly installed at the bottom of the limiting plate 25.

[0046] The working principle of the hemodialysis cannula shut-off device provided by this utility model is as follows:

[0047] When in use, after the limiting plate 25 is inserted into the inner side of the limiting groove 13, the magnetic plate 7 and the metal plate 6 can be magnetically attracted. In this way, the limiting plate 25 can be limited to the inner side of the limiting groove 13, increasing the stability of the limiting between the rotating plate 23 and the positioning plate 12.

[0048] Compared with related technologies, the hemodialysis cannula shut-off device provided by this utility model has the following beneficial effects:

[0049] The metal plate 6 and the magnetic plate 7 are magnetically attracted to each other, so that when in use, the limiting plate 25 can be limited to the inner side of the limiting groove 13, thereby increasing the stability of the connection between the rotating plate 23 and the positioning plate 12.

[0050] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A hemodialysis cannula shut-off device, characterized in that, include: A housing, wherein a sliding groove is provided on the top of the housing, and a positioning plate is fixedly installed on the side of the housing, and a limit groove is provided on the top of the positioning plate; A rotating block is rotatably connected to the top of the inner side of the housing. The rotating block has an upper eccentric hole inside and a groove on its outer side. A torsion spring is provided on the inner side of the groove. A rotating plate is fixedly installed on the side of the rotating block. A sliding plate is slidably connected inside the rotating block. A pulling plate is fixedly installed on the top of the sliding plate. A limit plate is fixedly installed on the bottom of the sliding plate. A fixed block is fixedly installed on the inner side of the casing, and the fixed block has a lower eccentric hole inside.

2. The hemodialysis cannula shut-off device according to claim 1, characterized in that, The rotating plate is disposed on the top of the housing and located on the inner side of the slide groove.

3. The hemodialysis cannula shut-off device according to claim 1, characterized in that, The rotating block is positioned on top of the fixed block.

4. The hemodialysis cannula shut-off device according to claim 1, characterized in that, A needle connector is fixedly installed on the top of the rotating block, and a flexible tube is fixedly installed on the bottom of the stationary block.

5. The hemodialysis cannula shut-off device according to claim 1, characterized in that, One end of the torsion spring is fixedly installed on the inner side of the groove, and the other end of the torsion spring is fixedly installed on the inner side of the housing.

6. The hemodialysis cannula shut-off device according to claim 1, characterized in that, The interior of the lower eccentric hole is connected to the interior of the flexible tube, and the interior of the needle connector is connected to the interior of the upper eccentric hole.

7. The hemodialysis cannula shut-off device according to claim 1, characterized in that, A magnetic plate is fixedly installed at the bottom of the inner side of the limiting groove, and a metal plate is fixedly installed at the bottom of the limiting plate.

Images