Thrombus suction negative pressure suction device

Abstract

A thrombus suction negative pressure suction device comprises an injection needle tube, a piston is arranged in the injection needle tube in a sliding mode, the head end of the injection needle tube is connected with a connecting sleeve, the head end of the injection needle tube is connected with symmetrically-distributed air outlet tubes, a limiting frame is arranged in each air outlet tube, an air blocking plate is arranged on each limiting frame in a sliding mode, and the air blocking plates are connected with the connecting sleeves in a sliding mode. The air blocking plate is used for sealing the air outlet pipe, the air blocking plate is sleeved with a first elastic piece, and a first ball valve is arranged in the connecting sleeve. By arranging the liquid storage tube on the injection needle tube, a urokinase solution can be directly injected into the suction catheter without additionally using a three-way valve, the overall operation is simpler, and the injection needle tube and the suction catheter can be blocked through the first ball valve, so that the injection needle tube and the suction catheter can be independently operated; and the injection needle tube can exhaust internal air through the air blocking plate, negative pressure is achieved, air is prevented from entering the suction catheter, and therefore it is guaranteed that the suction catheter is in a stable negative pressure state.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a thrombus aspiration negative pressure suction device. Background Art

[0002] Thrombus aspiration is an interventional treatment that, based on percutaneous transluminal coronary angioplasty, uses the principle of negative pressure aspiration to aspirate thrombus through an aspiration catheter. This treatment method is mainly for patients with acute coronary syndrome.

[0003] Generally, in clinical venous thrombus extraction operations, urokinase solution can be injected to dissolve large thrombi in blood vessels for aspiration. Currently, the urokinase solution is inhaled into the catheter through the three-way negative pressure suction method and then introduced into the blood vessel. However, during the actual operation of this method, air in other channels easily enters the aspiration catheter when rotating the three-way valve, causing the negative pressure in the catheter to disperse and decrease, affecting the aspiration effect, and the operation is relatively complex, and it is easy to make a wrong turn of the three-way valve.

[0004] Therefore, there is an urgent need to provide a thrombus aspiration negative pressure suction device that is simple in operation for injecting urokinase solution and can maintain the negative pressure state inside the aspiration catheter. Summary of the Utility Model

[0005] In order to overcome the shortcomings that when injecting urokinase solution through the three-way negative pressure suction method in the existing aspiration catheter, air in other channels easily enters the aspiration catheter when rotating the three-way valve, causing the negative pressure in the catheter to disperse and decrease, affecting the aspiration effect, and the operation is relatively complex, and it is easy to make a wrong turn of the three-way valve, the purpose of the utility model is to provide a thrombus aspiration negative pressure suction device that is simple in operation for injecting urokinase solution and can maintain the negative pressure state inside the aspiration catheter.

[0006] To achieve the above problems, the utility model adopts the following technical solution: A thrombus aspiration negative pressure suction device includes an injection syringe. A piston is slidably arranged inside the injection syringe. The head end of the injection syringe is connected with a connecting sleeve. The head end of the injection syringe is connected with symmetrically distributed air outlet pipes. A limiting frame is arranged inside the air outlet pipes. A gas blocking plate is slidably arranged on the limiting frame. The gas blocking plate is used to seal the air outlet pipes. A first elastic member is sleeved on the gas blocking plate. A first ball valve is arranged inside the connecting sleeve. Symmetrically distributed positioning frames are arranged on the injection syringe. A liquid storage tube is arranged on the positioning frames. Urokinase solution is stored in the liquid storage tube for thrombolysis. A cover plate is arranged at the top of the liquid storage tube. An infusion tube is arranged on the cover plate. One end of the infusion tube extends into the liquid storage tube. The other end of the infusion tube is fixed to the injection syringe through a support frame. A second ball valve is arranged at the lower part of the other end of the infusion tube. An airbag is arranged at the middle part of the other end of the infusion tube.

[0007] More preferably, a sealing rubber pad is provided on the surface of the air-blocking plate in contact with the limit frame, and the sealing rubber pad is used to enhance the airtightness of the air-blocking plate.

[0008] More preferably, the liquid storage tube is made transparent.

[0009] More preferably, an installation frame is provided inside the connection sleeve. A number of first adjustment frames are fixedly connected to the installation frame. A clamping rod is slidably arranged on the first adjustment frame. The upper end of the clamping rod passes through the connection sleeve. The clamping rod is used to clamp and fix the connection sleeve and the suction catheter. A second elastic member is sleeved on the clamping rod.

[0010] More preferably, the clamping rod is provided with an inclined surface.

[0011] More preferably, a liquid inlet is provided on the cover plate. A liquid adding tube is arranged at the liquid inlet of the cover plate. A second adjustment frame is arranged inside the liquid adding tube. A liquid blocking plate is slidably arranged on the second adjustment frame. The liquid blocking plate is used to seal the liquid adding tube. A push plate is fixedly connected to the liquid blocking plate. A third elastic member is sleeved on the liquid blocking plate.

[0012] More preferably, an annular wiping block is sleeved on the liquid storage tube, and the annular wiping block is used to clean the liquid storage tube.

[0013] More preferably, a protective cover is provided on the liquid adding tube, and the protective cover closes the liquid adding tube.

[0014] Compared with the prior art, the utility model has the following technical effects: 1. Through the setting of the liquid storage tube on the syringe needle tube, urokinase solution can be directly injected into the suction catheter without using a three-way valve for injection additionally. The overall operation is simpler. Moreover, the first ball valve can block the connection between the syringe needle tube and the suction catheter, enabling the syringe needle tube and the suction catheter to be operated independently. And the syringe needle tube can use the air-blocking plate to discharge the internal air to achieve negative pressure, avoiding air from entering the suction catheter, thereby ensuring a stable negative pressure state inside the suction catheter.

[0015] 2. Through the setting of the clamping rod on the syringe needle tube, the connected catheter can be quickly clamped and fixed to achieve convenient connection.

[0016] 3. Through the cooperation of the third elastic member and the liquid blocking plate, the nozzle of the liquid adding tube can be quickly and tightly sealed, thus effectively preventing air and foreign objects from entering the liquid storage tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional structural schematic diagram of the utility model.

[0018] Figure 2 is a three-dimensional sectional structural schematic diagram of the syringe needle tube, piston and air outlet pipe of the utility model.

[0019] Figure 3 This is a schematic three-dimensional sectional view of the limit frame, air-blocking plate and air outlet pipe of the present utility model.

[0020] Figure 4 This is a schematic three-dimensional sectional view of the airbag, support frame and infusion tube of the present utility model.

[0021] Figure 5 This is a schematic three-dimensional sectional view of the mounting frame, clamping rod and connecting sleeve of the present utility model.

[0022] Figure 6 This is a schematic three-dimensional sectional view of the protective cover plate, protective cover and liquid adding pipe of the present utility model.

[0023] Figure 7 This is a schematic three-dimensional sectional view of the push plate, liquid-blocking plate and liquid adding pipe of the present utility model.

[0024] The meanings of the reference numerals in the figure: 1: injection syringe, 2: piston, 3: air outlet pipe, 4: limit frame, 5: air-blocking plate, 6: first elastic member, 7: sealing rubber pad, 8: connecting sleeve, 9: first ball valve, 10: positioning frame, 11: liquid storage pipe, 12: cover plate, 13: infusion tube, 1301: second ball valve, 14: support frame, 15: airbag, 16: mounting frame, 17: first adjusting frame, 18: clamping rod, 19: second elastic member, 20: liquid adding pipe, 21: second adjusting frame, 22: liquid-blocking plate, 23: push plate, 24: third elastic member, 25: annular wiping block, 26: protective cover. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0026] Embodiment 1

[0027] Please refer to Figures 1 - 4, a thrombus aspiration negative pressure suction device, including an injection syringe 1, a piston 2 is slidably arranged in the injection syringe 1, a connecting sleeve 8 is connected to the head end of the injection syringe 1, two air outlet pipes 3 symmetrically distributed left and right are connected to the head end of the injection syringe 1, a limiting frame 4 is arranged in the air outlet pipe 3, a gas blocking plate 5 is slidably arranged in the middle of the limiting frame 4, the gas blocking plate 5 is used to seal the air outlet pipe 3, initially, the gas blocking plate 5 is in a closed state, and when the gas blocking plate 5 is opened, the air in the injection syringe 1 can be discharged. A sealing rubber pad 7 is arranged on the surface of the gas blocking plate 5 in contact with the limiting frame 4, and the sealing rubber pad 7 is used to increase the sealing performance of the gas blocking plate 5 to prevent air from entering the injection syringe 1. A first elastic member 6 is sleeved on the lower part of the gas blocking plate 5, and both ends of the first elastic member 6 are respectively connected to the gas blocking plate 5 and the limiting frame 4. A first ball valve 9 is arranged in the connecting sleeve 8, initially, the first ball valve 9 is in a closed state. Two positioning frames 10 symmetrically distributed left and right are arranged in the middle of the injection syringe 1, a liquid storage tube 11 is arranged on the positioning frame 10, and urokinase solution is stored in the liquid storage tube 11 for thrombolysis use. The liquid storage tube 11 is made of transparent material to facilitate observing the internal solution usage situation. A cover plate 12 is arranged at the top of the liquid storage tube 11, an infusion tube 13 is arranged in the middle of the cover plate 12, one end of the infusion tube 13 extends into the liquid storage tube 11, and the other end of the infusion tube 13 is fixed to the injection syringe 1 through a support frame 14. A second ball valve 1301 is arranged in the lower part of the other end of the infusion tube 13, initially, the second ball valve 1301 is in a closed state. An air bag 15 is arranged in the middle part of the other end of the infusion tube 13, and by squeezing the air bag 15, the urokinase solution in the liquid storage tube 11 can be pumped out. An annular wiping block 25 is sleeved outside the liquid storage tube 11, and by moving the annular wiping block 25 up and down, the outer surface of the liquid storage tube 11 can be wiped and cleaned.

[0028] First, connect the head end of the injection syringe 1 to the tail end of the aspiration catheter. Then open the first ball valve 9, withdraw the piston 2 to form a negative pressure in the catheter. Then quickly close the first ball valve 9 to keep a stable negative pressure state in the catheter, and push back the piston 2 to squeeze out the air in the injection syringe 1. The gas blocking plate 5 moves and opens the air outlet pipe 3 under the action of air pressure, and the air is discharged from the air outlet pipe 3, preventing air from entering the aspiration catheter after the injection syringe 1 is connected to the aspiration catheter, which affects the negative pressure state. After the air is discharged, the gas blocking plate 5 resets under the elastic force of the first elastic member 6 to close the air outlet pipe 3. At this time, withdraw the piston 2 again to form a negative pressure inside the injection syringe 1. Then first squeeze the air bag 15 to pump the urokinase solution in the liquid storage tube 11 into the infusion tube 13, and then open the second ball valve 1301. Under the negative pressure action in the injection syringe 1 and the catheter, the urokinase solution in the infusion tube 13 is sucked into the catheter, and then the urokinase solution is introduced into the blood vessel by the catheter for thrombolysis treatment. After thrombolysis is completed, continue to withdraw the piston 2 until the thrombus is aspirated.

[0029] Example 2

[0030] Based on Example 1, please refer to Figure 5 , an installation frame 16 is provided on the inner wall of the connecting sleeve 8. Four first adjusting frames 17 evenly distributed in the circumferential direction are fixedly connected to the installation frame 16. A clamping rod 18 is slidably arranged on the first adjusting frame 17. Both sides of the upper part of the clamping rod 18 are provided with inclined surfaces. The upper end of the clamping rod 18 penetrates out of the connecting sleeve 8. By moving the clamping rod 18 upward, it can be clamped onto the connected suction catheter, realizing quick fixation and connection. A second elastic member 19 is sleeved on the lower end of the clamping rod 18. Both ends of the second elastic member 19 are respectively connected to the clamping rod 18 and the connecting sleeve 8.

[0031] When connecting the head of the injection needle tube 1 to the tail end of the catheter, under the action of the inclined surface, the tail end of the catheter can squeeze the clamping rod 18, causing the clamping rod 18 to retract and compress the second elastic member 19. When the clamping rod 18 is aligned with the matching card slot on the catheter, the second elastic member 19 rebounds to drive the clamping rod 18 to reset, and the clamping rod 18 clamps and fixes the tail end of the catheter, realizing convenient connection.

[0032] Please refer to Figure 6 and Figure 7 , a liquid inlet is provided on the right side of the top of the cover plate 12. A liquid adding pipe 20 is arranged at the liquid inlet of the cover plate 12. A second adjusting frame 21 is arranged at the lower part inside the liquid adding pipe 20. A liquid blocking plate 22 is slidably arranged in the middle of the second adjusting frame 21. The liquid blocking plate 22 is used to seal the liquid adding pipe 20. Initially, the liquid blocking plate 22 is in a closed state. A push plate 23 is fixedly connected to the top of the liquid blocking plate 22. A third elastic member 24 is sleeved on the lower part of the liquid blocking plate 22. Both ends of the third elastic member 24 are respectively connected to the liquid blocking plate 22 and the second adjusting frame 21. A protective cover 26 is covered on the liquid adding pipe 20. The protective cover 26 seals the liquid adding pipe 20 to prevent foreign objects from entering the liquid adding pipe 20.

[0033] Pushing the push plate 23 to move the liquid blocking plate 22 downward to compress the third elastic member 24 can open the liquid adding pipe 20 to supplement the urokinase solution to the liquid storage tube 11. Releasing the push plate 23, the elastic force of the third elastic member 24 can make the liquid blocking plate 22 quickly reset to tightly seal the orifice of the liquid adding pipe 20, thereby effectively preventing air and foreign objects from entering the liquid storage tube 11.

[0034] Although the present invention has been described in detail with reference to the above embodiments, it is obvious to those skilled in the art through the present disclosure that various changes or modifications can be made to the present invention without departing from the principle and spirit scope of the present invention defined by the claims. Therefore, the detailed description of the embodiments of the present disclosure is only used to explain, rather than to limit the present invention, and the scope of protection is defined by the content of the claims.

Claims

1. A thrombus aspiration negative pressure suction device, comprising an injection syringe (1), a piston (2) is slidably arranged in the injection syringe (1), and a connecting sleeve (8) is connected to the head end of the injection syringe (1), characterized in that, The head end of the injection syringe tube (1) is connected with symmetrically distributed air outlet pipes (3). A limiting frame (4) is arranged in the air outlet pipe (3). A gas blocking plate (5) is slidably arranged on the limiting frame (4). The gas blocking plate (5) is used to seal the air outlet pipe (3). A first elastic member (6) is sleeved on the gas blocking plate (5). A first ball valve (9) is arranged in the connecting sleeve (8). Symmetrically distributed positioning frames (10) are arranged on the injection syringe tube (1). A liquid storage tube (11) is arranged on the positioning frame (10). The liquid storage tube (11) stores urokinase solution for thrombolysis. A cover plate (12) is arranged at the top end of the liquid storage tube (11). An infusion tube (13) is arranged on the cover plate (12). One end of the infusion tube (13) extends into the liquid storage tube (11). The other end of the infusion tube (13) is fixed to the injection syringe tube (1) through a support frame (14). A second ball valve (1301) is arranged at the lower section of the other end of the infusion tube (13). An air bag (15) is arranged at the middle section of the other end of the infusion tube (13).

2. The thrombus aspiration negative pressure suction device according to claim 1, wherein, A sealing rubber pad (7) is arranged on the surface of the gas blocking plate (5) in contact with the limiting frame (4). The sealing rubber pad (7) is used to increase the sealing performance of the gas blocking plate (5).

3. The thrombus aspiration negative pressure suction device according to claim 1, wherein, The liquid storage tube (11) is transparent.

4. The thrombus aspiration negative pressure suction device according to claim 1, wherein, An installation frame (16) is arranged in the connecting sleeve (8). A plurality of first adjusting frames (17) are fixedly connected to the installation frame (16). A clamping rod (18) is slidably arranged on the first adjusting frame (17). The upper end of the clamping rod (18) penetrates out of the connecting sleeve (8). The clamping rod (18) is used to clamp and fix the connecting sleeve (8) and the suction catheter. A second elastic member (19) is sleeved on the clamping rod (18).

5. The thrombus aspiration negative pressure suction device according to claim 4, wherein, The clamping rod (18) is provided with an inclined surface.

6. The thrombus aspiration negative pressure suction device according to claim 1, characterized in that, A liquid inlet is arranged on the cover plate (12). A liquid adding tube (20) is arranged at the liquid inlet of the cover plate (12). A second adjusting frame (21) is arranged in the liquid adding tube (20). A liquid blocking plate (22) is slidably arranged on the second adjusting frame (21). The liquid blocking plate (22) is used to seal the liquid adding tube (20). A push plate (23) is fixedly connected to the liquid blocking plate (22). A third elastic member (24) is sleeved on the liquid blocking plate (22).

7. The thrombus aspiration negative pressure suction device according to claim 1, wherein, An annular wiping block (25) is sleeved on the liquid storage tube (11). The annular wiping block (25) is used to clean the liquid storage tube (11).

8. The thrombus aspiration negative pressure suction device according to claim 6, wherein, A protective cover (26) is covered on the liquid adding tube (20). The protective cover (26) closes the liquid adding tube (20).

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