Thrombus filtering type central venous catheter

Abstract

The utility model belongs to the technical field of central venous catheters, and particularly relates to a thrombus filtering type central venous catheter which comprises an inner tube and an outer tube, the two ends of the inner tube are fixedly connected with a safety lock catch and a far end respectively, one end of the safety lock catch is fixedly connected with a mounting sleeve, and an adjusting threaded column is screwed in the mounting sleeve in a threaded mode. The outer wall of the adjusting threaded column is fixedly sleeved with a first adjusting cap, a pull pipe is movably sleeved between the inner pipe and the outer pipe, and the end, away from the adjusting threaded column, of the outer pipe is fixedly connected with a near end. Under the action of mutual cooperation of the mounting sleeve, the adjusting threaded column, the first adjusting cap, the first mounting cap, the second mounting cap, the pull tube, the pull ring, the filter screen fixing end, the thrombus filter screen and the elastic telescopic sleeve structure, a filter screen device capable of immediately adjusting the position and recycling thrombus is additionally arranged at the far end of the central catheter; and in the process of placing the central catheter, thrombus is filtered by adjusting the filter screen.

Description

Technical Field

[0001] This utility model belongs to the field of central venous catheter technology, specifically a thrombus-filtering central venous catheter. Background Technology

[0002] A central venous catheter (CDC) is inserted into the body's central venous circulatory system to measure central venous pressure, collect blood samples, and administer medications or solutions. Due to the presence of the catheter, thrombosis is a common complication, leading to complications such as pulmonary embolism, deep vein thrombosis, and lower extremity venous thrombosis.

[0003] Existing solutions typically involve placing a filter inside the catheter to filter out blood clots. However, placing the filter inside the catheter is limited by the catheter's inner diameter, which can easily increase resistance to venous return and make it inconvenient to use. Utility Model Content

[0004] The purpose of this invention is to provide a thrombus-filtering central venous catheter with the ability to adjust its position and retrieve thrombi in real time. Thrombi are filtered by adjusting the filter screen during the insertion of the central catheter.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A thrombus-filtering central venous catheter is provided, comprising an inner tube and an outer tube. A safety lock and a distal end are fixedly connected to both ends of the inner tube, respectively. An installation sleeve is fixedly connected to one end of the safety lock. An adjusting threaded post is threaded into the inner threaded post. An adjusting cap is fixedly sleeved on the outer wall of the adjusting threaded post. A pull tube is movably sleeved between the inner and outer tubes. A proximal end is fixedly connected to the end of the outer tube away from the adjusting threaded post. A filter fixing end is rotatably connected to the other end of the proximal end. A thrombus filter is fixedly connected to the filter fixing end. One end of the pull tube passes through both the proximal end and the filter fixing end and is fixedly connected to a pull ring. The other end of the thrombus filter is fixedly connected to the pull ring.

[0006] Optionally, the end of the pull tube away from the pull ring is rotatably connected to the adjusting threaded column, and the pull ring is movably sleeved on the outer wall of the inner tube.

[0007] Optionally, a developing ring is fixedly sleeved on the outer tube, and a distal end is fixedly connected to the end of the inner tube away from the safety lock.

[0008] Optionally, an adjusting cap two is rotatably connected to the end of the outer tube away from the proximal end, and an mounting cap two is rotatably connected to the other end of the adjusting cap two. An mounting cap one is rotatably connected to the end of the adjusting cap one away from the adjusting thread post, and an elastic telescopic sleeve is fixedly connected between the mounting cap one and the mounting cap two.

[0009] Optionally, a limiting groove is provided on the inner wall of the filter screen fixing end near the upper and lower positions, and a limiting block is fixedly connected to the upper and lower inner walls of the filter screen fixing end. The two limiting blocks are slidably connected in the two limiting grooves respectively, and the front and rear inner walls of the limiting blocks are both set to fit the inner wall of the limiting groove.

[0010] Optionally, the pull tube is respectively installed through the first mounting cap and the second mounting cap, and the second adjusting cap is fixedly sleeved on the outer wall of the pull tube.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. This utility model utilizes the cooperation of an installation sleeve, an adjusting threaded column, an adjusting cap one, an installation cap one, an installation cap two, a pull tube, a pull ring, a filter screen fixing end, a thrombus filter, and an elastic telescopic sleeve. This allows the filter screen to adhere to the outer wall of the inner tube in a contracted state. When thrombus filtration is needed, the adjusting cap one drives the adjusting threaded column to rotate, causing it to screw in relative to the installation sleeve. Utilizing the free expansion and contraction of the elastic telescopic sleeve, the adjusting cap one moves one end of the pull tube, thereby moving the pull ring. The pull ring presses against one end of the thrombus filter, causing it to expand and achieve a filtering effect. Compared to placing a filter screen inside the inner tube, this effectively avoids the problem of increased resistance to venous return. By adding a filter screen device at the distal end of the central catheter that can be adjusted in real time and used to collect thrombi, the filter screen can be adjusted during the insertion of the central catheter to filter thrombi.

[0013] 2. This utility model is provided with a proximal end, an adjusting cap II, a limiting groove, and a limiting block. By utilizing the relationship that the filter screen fixing end can rotate relative to the proximal end and the adjusting cap II can rotate relative to the outer tube, this utility model can rotate the limiting block by rotating the adjusting cap II externally. In turn, under the limiting action of the limiting groove, the filter screen fixing end can rotate relative to the proximal end, thereby controlling the rotation of the thrombus filter and further improving the filtration effect. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a partial cross-sectional three-dimensional structural schematic diagram of the present invention;

[0017] Figure 3 This is a cross-sectional perspective view of the elastic telescopic sleeve of this utility model.

[0018] Figure 4 This is a cross-sectional three-dimensional structural diagram of the filter screen fixing end of this utility model.

[0019] In the diagram: 1. Inner tube; 2. Pull tube; 3. Safety lock; 4. Mounting sleeve; 5. Adjusting threaded post; 6. Adjusting cap one; 7. Mounting cap one; 8. Pull ring; 9. Outer tube; 10. Imaging ring; 11. Proximal end; 12. Filter screen fixing end; 13. Thrombus filter screen; 14. Distal end; 15. Adjusting cap two; 16. Mounting cap two; 17. Elastic telescopic sleeve; 18. Limiting groove; 19. Limiting block. Detailed Implementation

[0020] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0021] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0022] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] Reference Figure 1-4The present invention provides a thrombus-filtering central venous catheter. A thrombus-filtering central venous catheter includes an inner tube 1 and an outer tube 9. A safety lock 3 and a distal end 14 are fixedly connected to both ends of the inner tube 1, respectively. An installation sleeve 4 is fixedly connected to one end of the safety lock 3. An adjusting threaded post 5 is threaded into the inner threaded post 4. An adjusting cap 6 is fixedly sleeved on the outer wall of the adjusting threaded post 5. A pull tube 2 is movably sleeved between the inner tube 1 and the outer tube 9. A proximal end 11 is fixedly connected to one end of the outer tube 9 away from the adjusting threaded post 5. A filter fixing end 12 is rotatably connected to the other end of the proximal end 11. A thrombus filter 13 is fixedly connected to the filter fixing end 12. One end of the pull tube 2 passes through the proximal end 11 and the filter fixing end 12 and is fixedly connected to a pull ring 8. The other end of the thrombus filter 13 is fixedly connected to the pull ring 8.

[0025] This utility model provides a thrombus-filtering central venous catheter. Compared with the prior art, it adds a filter device at the distal end of the central catheter that can be adjusted in real time and used to retrieve thrombi. During the insertion of the central catheter, the thrombus is filtered by adjusting the filter device.

[0026] In another embodiment of this utility model, please refer to Figures 1 to 2 The end of the pull tube 2 away from the pull ring 8 is rotatably connected to the adjusting threaded column 5. The pull ring 8 is movably sleeved on the outer wall of the inner tube 1. The developing ring 10 is fixedly sleeved on the outer tube 9. The end of the inner tube 1 away from the safety lock 3 is fixedly connected to the distal end head 14.

[0027] In another embodiment of this utility model, please refer to Figure 2 and Figure 3 An adjusting cap 2 15 is rotatably connected to one end of the outer tube 9 away from the proximal end 11. An mounting cap 2 16 is rotatably connected to the other end of the adjusting cap 2 15. An mounting cap 1 7 is rotatably connected to one end of the adjusting cap 1 6 away from the adjusting threaded post 5. An elastic telescopic sleeve 17 is fixedly connected between the mounting cap 1 7 and the mounting cap 2 16. The elastic telescopic sleeve 17 can cooperate with the screwing in and out movement of the adjusting threaded post 5, so that the adjusting threaded post 5 can move telescopically relative to the outer tube 9.

[0028] In another embodiment of this utility model, please refer to Figure 3 and Figure 4Limiting grooves 18 are provided on the inner wall of the filter fixing end 12 near the upper and lower positions. Limiting blocks 19 are fixedly connected to the upper and lower inner walls of the filter fixing end 12. The two limiting blocks 19 are slidably connected in the two limiting grooves 18 respectively, and the front and rear inner walls of the limiting blocks 19 are set to fit the inner walls of the limiting grooves 18, so that the pull tube 2 can drive the pull ring 8 to move relative to the filter fixing end 12, thereby causing the thrombus filter 13 to expand. At the same time, under the action of the limiting blocks 19, the pull tube 2 drives the pull ring 8 to rotate. During the process of controlling the rotation of the thrombus filter 13, the filter fixing end 12 will be driven to rotate, thereby making the thrombus filter 13 rotate. The pull tube 2 is respectively set through the mounting cap 1 7 and the mounting cap 2 16. The adjusting cap 2 15 is fixedly sleeved on the outer wall of the pull tube 2. By rotating the adjusting cap 2 15, the pull tube 2 can be driven to rotate.

[0029] Working principle: In use, by adjusting the first 6, the adjusting threaded post 5 is screwed in relative to the mounting sleeve 4, which drives the pull tube 2 to rotate and move one end connected inside the adjusting threaded post 5. This causes the pull ring 8 at the other end of the pull tube 2 to move, thereby compressing one end of the thrombus filter 13 and causing it to expand and unfold, thus filtering the thrombus. At the same time, the second 15 rotates relative to the outer tube 9, which drives the fixedly sleeved pull tube 2 to rotate, thereby driving the limiting block 19 to rotate. This causes the fixed end 12 of the filter to rotate relative to the proximal end 11 under the action of the limiting block 19, thereby controlling the rotation of the thrombus filter 13 and further improving the filtration effect.

[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A thrombus-filtering central venous catheter, comprising an inner tube (1) and an outer tube (9), characterized in that: The inner tube (1) is fixedly connected to a safety lock (3) and a distal end (14) at both ends. One end of the safety lock (3) is fixedly connected to an installation sleeve (4). An adjusting threaded post (5) is screwed into the inner thread of the installation sleeve (4). An adjusting cap (6) is fixedly sleeved on the outer wall of the adjusting threaded post (5). A pull tube (2) is movably sleeved between the inner tube (1) and the outer tube (9). One end of the outer tube (9) away from the adjusting threaded post (5) is fixedly connected to a proximal end (11). The other end of the proximal end (11) is rotatably connected to a filter screen fixing end (12). A thrombus filter (13) is fixedly connected to the filter screen fixing end (12). One end of the pull tube (2) passes through the proximal end (11) and the filter screen fixing end (12) and is fixedly connected to a pull ring (8). The other end of the thrombus filter (13) is fixedly connected to the pull ring (8).

2. The thrombofiltration central venous catheter as described in claim 1, characterized in that: The end of the pull tube (2) away from the pull ring (8) is rotatably connected inside the adjusting threaded column (5), and the pull ring (8) is movably sleeved on the outer wall of the inner tube (1).

3. The thrombofiltration central venous catheter as described in claim 1, characterized in that: A developing ring (10) is fixedly sleeved on the outer tube (9), and a distal end (14) is fixedly connected to the end of the inner tube (1) away from the safety lock (3).

4. The thrombofiltration central venous catheter as described in claim 1, characterized in that: The outer tube (9) is rotatably connected to an adjusting cap two (15) at one end away from the near end (11), and the other end of the adjusting cap two (15) is rotatably connected to an mounting cap two (16). The end of the adjusting cap one (6) away from the adjusting threaded post (5) is rotatably connected to a mounting cap one (7). An elastic telescopic sleeve (17) is fixedly connected between the mounting cap one (7) and the mounting cap two (16).

5. A thrombofiltration central venous catheter as described in claim 4, characterized in that: Limiting grooves (18) are provided on the inner wall of the filter fixing end (12) near the upper and lower positions. Limiting blocks (19) are fixedly connected on the upper and lower inner walls of the filter fixing end (12). The two limiting blocks (19) are slidably connected in the two limiting grooves (18), and the front and rear inner walls of the limiting blocks (19) are both set to fit the inner wall of the limiting grooves (18).

6. A thrombofiltration central venous catheter as described in claim 4, characterized in that: The pull tube (2) is respectively installed through the first mounting cap (7) and the second mounting cap (16), and the second adjusting cap (15) is fixedly sleeved on the outer wall of the pull tube (2).

Images