Thrombus aspiration device

Abstract

The utility model relates to a thrombus aspiration device, which belongs to the technical field of medical instruments, and comprises a piston rod, an injector empty cylinder and a clamping limit piece, the piston rod comprises a fan blade and a piston arranged at the end part of the fan blade, the piston is arranged in the injector empty cylinder, a plurality of grooves are arranged on the fan blade, and the clamping limit piece is arranged on the fan blade. A groove is formed in the injector hollow cylinder, the clamping limiting piece is located outside the injector hollow cylinder and clamped in the groove, an injection head communicated with the injector hollow cylinder is arranged at the end of the injector hollow cylinder, the injection head is connected with a suction catheter through a Luer connector, and a pressure monitoring assembly is arranged on the injection head. The real-time pressure in the injector in the thrombus suction process can be read by arranging the pressure gauge, and whether the suction catheter makes contact with the thrombus or not can be judged in an auxiliary mode. The thrombus suction device can visually monitor the negative pressure in the injector, and thrombus at the head end of the catheter is prevented from falling off due to insufficient negative pressure when the suction catheter is withdrawn.

Description

Technical Field

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

[0002] Various venous thrombi and arterial thrombi are common clinical diseases. Patients often need emergency thrombus aspiration interventional treatment. There are two aspiration methods: aspiration pump and syringe. Since syringe aspiration is convenient, efficient, and economical, and can achieve similar effects to pump aspiration, syringes are usually used for thrombus aspiration. However, the existing disposable syringe thrombus aspiration device cannot intuitively monitor the suction force in the syringe during the operation, and cannot accurately determine whether the syringe still has sufficient negative pressure to generate sufficient suction when the aspiration catheter is withdrawn from the blood vessel. There is a risk of causing the thrombus in the aspiration catheter to fall into the blood vessel. In addition, the existing syringe thrombus aspiration device has a small selection of piston rod limit slots, and the syringe suction force is poorly controllable. When the required suction force is more precise, it cannot meet the requirements, which may cause a waste of patient blood.

[0003] Therefore, it is necessary to invent a thrombus aspiration device in which the aspiration pressure can be intuitively monitored and the aspiration force of the syringe can be accurately adjusted. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the utility model provides a thrombus aspiration device with good economy, intuitive monitoring of aspiration pressure and accurate adjustment of syringe aspiration force.

[0005] In order to achieve the above-mentioned purpose of the utility model, the utility model provides a thrombus suction device, including a piston rod, a syringe barrel and a clamping limit plate, the piston rod includes a fan blade and a piston arranged at the end of the fan blade, the piston is arranged in the syringe barrel, the fan blade is provided with a plurality of grooves, the clamping limit plate is located outside the syringe barrel and is clamped in the grooves, the end of the syringe barrel is provided with an injection head connected to the syringe barrel, the injection head is connected to the suction catheter through a Luer connector, and a pressure monitoring component is provided on the injection head.

[0006] Furthermore, the pressure monitoring component includes a pressure gauge and a valve switch for controlling the connection between the empty barrel of the syringe, the pressure gauge, and the suction catheter.

[0007] Furthermore, the fan blade includes an upper fan blade and a lower fan blade, the upper fan blade is evenly provided with a plurality of upper grooves, the lower fan blade is provided with a plurality of lower grooves, the clamping limit plate is clamped with the upper groove or the lower groove, and the clamping limit plate includes a clamping groove.

[0008] Furthermore, the upper grooves and the lower grooves are arranged alternately.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] 1. The real-time pressure in the syringe during thrombus aspiration can be read through the pressure gauge to assist in determining whether the aspiration catheter contacts the thrombus;

[0011] 2. The negative pressure in the syringe can be visually monitored to avoid the thrombus at the catheter tip falling off due to insufficient negative pressure when the suction catheter is withdrawn;

[0012] 3. By setting the upper groove and the lower groove, each groove corresponds to a specific pressure value, and the suction force can be accurately adjusted in conjunction with the card limit plate, and the structure is stable and reliable. When the amount of thrombus aspiration is roughly determined, the piston rod can be limited to a suitable position according to the pressure gauge value, so that the syringe can generate an appropriate suction force to avoid excessive suction force, excessive blood aspiration, and waste of patient blood. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0014] Figure 2 This is an enlarged structural schematic diagram of the piston rod of an embodiment of the utility model;

[0015] Figure 3 It is an enlarged structural schematic diagram of the clamping limit plate of the embodiment of the utility model. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described in conjunction with the drawings of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. The embodiment of the utility model is described below in conjunction with the drawings.

[0017] like Figure 1-3 As shown, the thrombus aspiration device comprises a piston 8 rod 1, a syringe barrel 3 and a clamping limit plate 2. The piston 8 rod 1 comprises a fan blade and a piston 8 arranged at the end of the fan blade. The piston 8 is arranged in the syringe barrel 3. The fan blade is provided with a plurality of grooves. The clamping limit plate 2 is located outside the syringe barrel 3 and clamped in the grooves. The clamping limit plate 2 is used to limit the piston 8 rod 1 from moving into the syringe barrel 3. The end of the syringe barrel 3 is provided with an injection head 13 connected to the syringe barrel 3. The injection head 13 is connected to the aspiration catheter 6 through a Luer connector 7. The head of the aspiration catheter 6 enters the blood vessel to aspirate the thrombus. The injection head 13 is provided with a pressure monitoring component.

[0018] The piston 8 moves inside the syringe barrel 3, which can generate different pressures inside the syringe barrel 3;

[0019] The pressure monitoring component includes a pressure gauge 4 and a valve switch 5 for controlling the connection between the empty syringe barrel 3, the pressure gauge 4, and the suction catheter 6. When the valve switch 5 is turned on, the pressure in the inner cavity of the syringe and the connection state between the empty syringe barrel 3, the pressure gauge 4, and the suction catheter 6 can be monitored;

[0020] The fan blades include an upper fan blade 9 and a lower fan blade 10. The upper fan blade 9 is evenly provided with a plurality of upper grooves 11. The lower fan blade 10 is provided with a plurality of lower grooves 12. The clamping limit piece 2 is clamped with the upper groove 11 or the lower groove 12. The clamping limit piece 2 includes a clamping groove 14.

[0021] The upper grooves 11 and the lower grooves 12 are arranged alternately, and each upper groove 11 and each lower groove 12 corresponds to a pressure value, and the suction force can be accurately adjusted in cooperation with the clamping limit plate 2;

[0022] The operating steps of the thrombus aspiration device are as follows:

[0023] Empty the air in the empty syringe barrel 3 and close the valve switch 5;

[0024] Pull piston 8 and rod 1 to the appropriate scale position;

[0025] The clamping limit piece 2 is clamped into a suitable groove on the fan blade;

[0026] Connect the injection head 13 to the suction catheter 6, and then open the valve switch 5 to perform suction;

[0027] After the suction is completed, the suction catheter 6 is withdrawn;

[0028] Disconnect the injection head 13 from the suction catheter 6, remove the clamping limit plate 2, open the valve switch 5, push the piston 8 rod 1, and discharge the thrombus from the syringe;

[0029] Working principle: the air in the empty syringe barrel 3 is emptied, the valve switch 5 is closed, and the piston 8 rod 1 is pulled to form a negative pressure in the inner cavity of the empty syringe barrel 3. The empty syringe barrel 3 with negative pressure is connected to the suction catheter 6. When the front end of the suction catheter contacts the thrombus, the valve switch 5 is opened. Due to the negative pressure, the empty syringe barrel 3 generates a suction force, which can be used to aspirate the thrombus.

[0030] The real-time pressure in the syringe during the thrombus aspiration process can be read by the pressure gauge 4 to assist in determining whether the aspiration catheter 6 contacts the thrombus;

[0031] The negative pressure in the syringe can be visually monitored to prevent the thrombus at the catheter tip from falling off due to insufficient negative pressure when the suction catheter 6 is withdrawn;

[0032] By setting the upper groove 11 and the lower groove 12, each groove corresponds to a specific pressure value, and the suction force can be accurately adjusted in conjunction with the clamping limit plate 2, and the structure is stable and reliable. When the amount of thrombus suction is roughly determined, the piston 8 and rod 1 can be limited to a suitable position according to the value of the pressure gauge 4, so that the syringe can generate an appropriate suction force to avoid excessive suction force, excessive blood suction, and waste of patient blood.

[0033] The above describes the technical solution of the utility model in combination with specific implementation methods, but it should be noted that the above descriptions are only for explaining the solution of the utility model and cannot be interpreted as a specific limitation on the protection scope of the utility model in any way. Based on the explanation here, technicians in this field can think of other specific implementation methods or equivalent replacements of the utility model without creative work, which will fall within the protection scope of the utility model.

Claims

1. A thrombus aspiration device, characterized in that: It comprises a piston rod, a syringe barrel and a clamping limit plate, wherein the piston rod comprises a fan blade and a piston arranged at the end of the fan blade, the piston is arranged in the syringe barrel, the fan blade is provided with a plurality of grooves, the clamping limit plate is located outside the syringe barrel and is clamped in the grooves, an injection head connected to the syringe barrel is provided at the end of the syringe barrel, the injection head is connected to the suction catheter through a Luer connector, and a pressure monitoring component is provided on the injection head.

2. The thrombus aspiration device according to claim 1, characterized in that: The pressure monitoring assembly includes a pressure gauge and a valve switch for controlling the connection between the empty barrel of the syringe, the pressure gauge, and the suction catheter.

3. The thrombus aspiration device according to claim 1, characterized in that: The fan blades include an upper fan blade and a lower fan blade, the upper fan blade is evenly provided with a plurality of upper grooves, the lower fan blade is provided with a plurality of lower grooves, the clamping limit piece is clamped with the upper grooves or the lower grooves, and the clamping limit piece includes a clamping groove.

4. The thrombus aspiration device according to claim 3, characterized in that: The upper grooves and the lower grooves are arranged alternately.

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