Thrombus aspiration device

Abstract

The utility model relates to a thrombus aspiration device, and relates to the technical field of medical instruments, the thrombus aspiration device comprises a aspiration assembly, the aspiration assembly comprises an aspiration shell, a blood storage cavity is formed in the aspiration shell, a core rod is arranged on the aspiration shell, the core rod slides in the blood storage cavity, and along with the sliding of the core rod, the blood storage cavity is communicated with the blood storage cavity; negative pressure is formed in the blood storage cavity; the filtering assembly comprises a filtering shell, an outlet and an inlet are formed in the filtering shell, the outlet is communicated with the blood containing cavity, and the inlet is communicated with blood vessels of a patient; and the recovery assembly is communicated with the blood storage cavity, and the recovery assembly is used for recovering the sucked blood of the patient. According to the thrombus aspirator, the situation of excessive blood loss of a patient in the thrombus aspiration process is prevented.

Description

Technical Field

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

[0002] At present, the use of interventional treatment to treat vascular diseases has become a development trend. Percutaneous mechanical thrombectomy mainly uses a rotary turbine or fluid power principle to break up or aspirate thrombi, thereby achieving the effect of quickly removing or reducing thrombus load and relieving venous obstruction. Generally, a special catheter is used to reach the thrombus site through the blood vessels, and then a negative pressure device is connected to the catheter. The thrombus is transferred to the outside of the body through the catheter under the action of negative pressure, thereby achieving the purpose of removing the thrombus.

[0003] In the prior art, the negative pressure device is usually a negative pressure pump, but the negative pressure value of the negative pressure pump during the operation is not easy to adjust, and it is easy to cause complications such as tearing of the vascular endothelium and damaging the vascular wall due to excessive suction; and continuous suction leads to excessive blood loss, causing excessive blood loss in patients, and severe blood loss requires blood transfusion after surgery. Negative pressure suction devices for interventional treatments must be used in conjunction with special large-scale equipment, which are complicated to operate, occupy a large area, are inconvenient to move, are noisy, and are expensive.

[0004] Another negative pressure device is a syringe. This common syringe has a small volume and will draw blood along with the thrombus. Multiple draws may also cause excessive blood loss in the patient. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a thrombus suction device, which solves the technical problem that continuous blood suction by a negative pressure device easily leads to excessive blood loss in patients.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A thrombus suction device comprises: a suction component, the suction component comprises a suction shell, a blood receiving chamber is formed in the suction shell, a core rod is arranged on the suction shell, the core rod slides in the blood receiving chamber, and as the core rod slides, a negative pressure is formed in the blood receiving chamber; a filter component, the filter device comprises a filter shell, an outlet and an inlet are formed on the filter shell, the outlet is connected to the blood receiving chamber, and the inlet is connected to the patient's blood vessel; a recovery component, the recovery component is connected to the blood receiving chamber, and the recovery component recovers the patient's aspirated blood.

[0008] Through the above technical solution, the core rod slides in the suction shell. As the core rod slides, negative pressure is formed in the blood receiving chamber of the suction shell. At this time, the thrombus and part of the blood in the patient's body flow into the suction shell. After the blood and thrombus flow out of the patient's body, they flow into the inlet of the filter shell. After being filtered by the filter shell, the thrombus remains in the filter shell, and the blood flows into the blood receiving chamber of the suction shell. At this time, the blood in the blood receiving chamber can be recovered by the recovery component, and after aseptic operation, it is recovered back into the human body to complete blood recovery. This prevents the patient from losing too much blood during the process of suctioning the thrombus.

[0009] Furthermore, a suction jacket is installed in the suction shell, the blood collecting chamber is formed in the suction jacket, a core plate is provided at one end of the core rod, a sealing ring is sleeved on the core plate, and the sealing ring and the suction jacket are sealed by interference fit.

[0010] Through the above technical solution, the core plate is connected to the core rod, the sealing ring is sleeved on the core plate, and the sealing ring contacts the inner wall of the suction sleeve, thereby improving the efficiency of the suction shell in sucking the patient's blood.

[0011] Furthermore, a handle is provided on the suction shell, the core rod is connected to the handle, a spring is provided between the core plate and the suction shell, and the spring is pressed against the suction shell and the core plate; a locking block is slidably installed on the suction shell, and the locking block locks the handle.

[0012] Through the above technical solution, the handle drives the core rod and the core plate to move in the suction sleeve. When the blood collecting chamber needs to maintain a negative pressure state, the locking block locks the handle. When the blood needs to be released, the locking block unlocks the handle. At this time, the core plate drives the core plate to move under the action of the spring, so that the negative pressure state in the blood collecting chamber is released.

[0013] Furthermore, a filter membrane is installed in the filter housing, and filter holes are provided on the filter membrane. A plurality of filter holes are provided at intervals on the filter membrane.

[0014] Through the above technical solution, after the blood flows into the filter housing, the thrombus mixed in the blood is blocked by the filter membrane, and the blood flows out of the filter housing through the filter holes on the filter membrane.

[0015] Furthermore, the recovery component includes a blood recovery bag, and the blood recovery bag is connected to the blood receiving cavity.

[0016] Through the above technical solution, the filtered blood is injected from the suction shell into the blood recovery bag, thereby improving the convenience of blood recovery.

[0017] Furthermore, a first switch valve and a first one-way valve are arranged between the suction shell and the filter shell, and the first switch valve adjusts the conduction / closing between the suction shell and the filter shell. A second switch valve and a second one-way valve are arranged between the suction shell and the blood recovery bag, and the second switch valve adjusts the conduction / closing between the suction shell and the blood recovery bag.

[0018] Through the above technical solution, the first switch valve and the second switch valve control the on / off of the pipeline, and the first one-way valve and the second one-way valve allow blood to flow in only one direction.

[0019] Furthermore, a third switch valve is provided on the suction housing, and the third switch valve adjusts the on / off state of the blood receiving chamber.

[0020] Through the above technical solution, the third switch valve enables the filtered blood to be discharged from the suction housing.

[0021] Furthermore, a Y-valve is provided on one side of the filter housing, a Y-valve head end is provided on the Y-valve, a catheter is connected to the Y-valve head end, the catheter penetrates into the patient's blood vessel, a Y-valve side branch is provided on the Y-valve, and the Y-valve side branch is connected to the inlet of the filter housing.

[0022] Through the above technical solution, one end of the catheter is inserted into the patient's blood vessel, connecting the inlet of the filter housing with the Y-valve side branch on the Y-valve, thereby improving the convenience of blood flowing into the filter housing.

[0023] In summary, the present application includes at least one of the following beneficial technical effects of the thrombus aspiration device:

[0024] 1. The core rod slides in the suction shell. As the core rod slides, negative pressure is formed in the blood receiving chamber of the suction shell. At this time, the thrombus and part of the blood in the patient's body flow into the suction shell. After the blood and thrombus flow out of the patient's body, they flow into the inlet of the filter shell. After being filtered by the filter shell, the thrombus remains in the filter shell, and the blood flows into the blood receiving chamber of the suction shell. At this time, the blood in the blood receiving chamber can be recovered by the recovery component, and after aseptic operation, it is recovered back into the human body to complete blood recovery. This prevents the patient from losing excessive blood during the process of suctioning the thrombus;

[0025] 2. The blood recovery efficiency after blood filtration is improved by setting the blood recovery bag and the third switch valve;

[0026] 3. Through the setting of the first one-way valve and the second one-way valve, blood can only flow in one direction, reducing the backflow of blood. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the overall structure of a thrombus aspiration device mainly embodied in the first embodiment;

[0028] Figure 2 This is a schematic diagram of the structure of the suction assembly mainly embodied in the present embodiment 1;

[0029] Figure 3 This is an exploded schematic diagram of the suction assembly mainly embodied in the present embodiment 1;

[0030] Figure 4 is a cross-sectional view of the filter assembly mainly embodied in the present embodiment 1;

[0031] Figure 5 This is a cross-sectional view of the first one-way valve structure mainly embodied in the present embodiment 1.

[0032] Reference numerals:

[0033] 1. Suction assembly; 11. Suction housing; 111. Upper handle cover; 112. Lower handle cover; 12. Suction jacket; 121. Blood collection chamber; 122. Extension port; 13. Core rod; 131. Core plate; 132. Sealing ring; 133. Sealing groove; 134. Spring; 14. Handle; 141. Stopper; 15. Locking block; 16. Suction tube; 161. First switch valve; 162. First one-way valve; 1621. First connecting tube; 1622. Silicone Sheet; 16221, guide seam; 1623, second connecting pipe; 2, filter assembly; 21, filter shell; 211, shell; 2111, outlet; 212, sealing cover; 2121, inlet; 22, filter membrane; 221, filter hole; 3, recovery assembly; 31, blood recovery bag; 32, recovery tube; 33, second switch valve; 34, second one-way valve; 4, Y valve; 41, Y valve head end; 42, catheter; 43, Y valve side branch; 5, third switch valve. DETAILED DESCRIPTION

[0034] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the present invention is further described below in conjunction with specific embodiments.

[0035] The following is combined with Figure 1-5 This application is described in further detail.

[0036] The embodiment of the present application discloses a thrombus aspiration device.

[0037] Example 1

[0038] Reference Figure 1A thrombus suction device includes a suction component 1, a filtering component 2 and a recovery component 3. The suction component 1 extracts the thrombus and blood in the patient's blood vessel from the patient's body. After the blood is extracted from the human body, the filtering component 2 filters the blood vessel. After the thrombus in the blood is filtered, the recovery component 3 recovers the filtered blood, and the recovered blood is recovered into the human body after aseptic operation.

[0039] Reference Figure 2 The suction assembly 1 includes a suction shell 11, which is composed of a handle upper cover 111 and a handle lower cover 112. The handle upper cover 111 and the handle lower cover 112 are buckled together, and then ultrasonic welding is used to weld the handle upper cover 111 and the handle lower cover 112.

[0040] A suction jacket 12 is provided between the handle upper cover 111 and the handle lower cover 112, and the suction jacket 12 is clamped between the handle upper cover 111 and the handle lower cover 112. A blood receiving chamber 121 is formed in the suction jacket 12, and the volume capacity of the blood receiving chamber 121 is ≥ 60 ml. Preferably, the volume capacity of the blood receiving chamber 121 is 60 ml. Three extension ports 122 are provided at one end of the suction jacket 12, and the three extension ports 122 are used for blood to flow into or out of the blood receiving chamber 121.

[0041] Reference Figure 3 The blood receiving chamber 121 of the suction jacket 12 is open toward the side away from the three extension ports 122, a core rod 13 is slidably installed on the suction shell 11, one end of the core rod 13 extends into the blood receiving chamber 121 of the suction jacket 12, and a core plate 131 is provided at the end of the core rod 13 extending into the blood receiving chamber 121, a sealing ring 132 is provided on the core plate 131, and a sealing groove 133 for accommodating the sealing ring 132 is provided on the core plate 131, the sealing ring 132 is sleeved on the sealing groove 133 of the core plate 131, the core plate 131 is sealed with the suction jacket 12 through the sealing ring 132, and the movement of the core plate 131 pulled by the core rod 13 forms a negative pressure chamber inside the blood receiving chamber for accommodating filtered blood.

[0042] Furthermore, in order to improve the convenience of the sliding of the core rod 13, a handle 14 is provided between the handle upper cover 111 and the handle lower cover 112. The handle 14 can slide along the axial direction of the core rod 13 in the reserved groove between the handle upper cover 111 and the handle lower cover 112, and the end of the core rod 13 away from the core plate 131 is threadedly connected to the handle. When in use, the core rod 13 is driven to slide by the handle 14. When the core rod 13 moves to the side away from the three extension ports 122, negative pressure is formed in the suction jacket 12. At this time, blood flows into the blood receiving chamber 121 of the suction jacket 12. When the core rod 13 moves to the side close to the three extension ports 122, blood flows out of the blood receiving chamber 121 of the suction jacket 12.

[0043] In order to improve the convenience of moving the core rod 13 toward the side close to the three extension ports 122, a spring 134 is sleeved on the core rod 13, one end of the spring 134 is pressed tightly between the handle upper cover 111 and the handle lower cover 112, and the other end is pressed tightly against the core plate 131. When the core rod 13 drives the core plate 131 to move toward the side away from the three extension ports 122, the spring 134 is compressed. When the handle 14 is released, the core plate 131 moves toward the side close to the three extension ports 122 under the action of the spring 134.

[0044] Furthermore, a locking block 15 is provided between the handle upper cover 111 and the handle lower cover 112. The locking block 15 is slidably installed between the handle upper cover 111 and the handle lower cover 112, and a stopper 141 is provided on the handle 14. In order to save the operator from having to continuously pull the handle 14, when the handle 14 drives the core rod 13 to move to a side away from the three extension ports 122, the locking block 15 slides to a side close to the stopper 141, thereby allowing the locking block 15 to lock the stopper 141 on the handle 14, thereby allowing the blood receiving chamber 121 to continuously maintain a negative pressure state.

[0045] Reference Figure 4 The filter assembly 2 includes a filter housing 21, which is composed of a shell 211 and a sealing cover 212. The shell 211 is a barrel-shaped structure, and the shell 211 is made of transparent plastic. The sealing cover 212 is threadedly connected to the shell 211, and an inlet 2121 is formed on the sealing cover 212, and an outlet 2111 is formed on the shell 211. Blood flows in from the inlet 2121 of the sealing cover 212 and flows out from the outlet 2111 of the shell 211. A filter membrane 22 is arranged inside the shell 211, and the filter membrane 22 is pressed and fixed in the shell 211 through the threaded connection between the shell 211 and the sealing cover 212. The filter membrane 22 is provided with a filter hole 221, and a plurality of filter holes 221 are evenly distributed on the filter membrane 22. The pore size of the filter hole 221 is 80-130 μm, and the filter membrane 22 can accommodate 20 ml of thrombus. When blood mixed with thrombus flows in from the inlet 2121 on the sealing cover 212 , the thrombus is blocked by the filter membrane 22 , while the blood flows out from the outlet 2111 of the housing 211 through the filter holes 221 on the filter membrane 22 .

[0046] Reference Figure 5A suction pipe 16 is provided on one side of the suction housing 211, one end of the suction pipe 16 is connected to one of the extension ports 122 of the suction jacket 12, and a first switch valve 161 is installed on the other end of the suction pipe 16, and the first switch valve 161 controls the conduction or closing of the suction pipe 16. A first check valve 162 is provided between the first switch valve 161 and the filter housing 21, and the first check valve 162 is composed of a first connecting pipe 1621, a silicone sheet 1622, and a second connecting pipe 1623. One end of the first connecting pipe 1621 is connected to the first switch valve 161, the silicone sheet 1622 is bonded between the first connecting pipe 1621 and the second connecting pipe 1623, and one end of the second connecting pipe 1623 is connected to the outlet 2111 on the housing 211. A guide slot 16221 is provided on the silicone sheet 1622, and the guide slot 16221 connects the first connecting pipe 1621 and the second connecting pipe 1623. When in use, the silicone sheet 1622 on the first one-way valve 162 ensures that the fluid / gas / thrombus can only flow from the filter housing 21 to the suction housing 11, otherwise the first one-way valve 162 is in a closed state.

[0047] Furthermore, a Y-valve 4 is provided on one side of the filter housing 21. The Y-valve 4 is a disposable Y-type connecting valve used in various interventional surgeries to guide, place and lock the guidewire of the catheter 42. A Y-valve head end 41 is formed on the Y-valve 4, and the Y-valve head end 41 is installed on the Y-valve 4. A catheter 42 is connected to the Y-valve head end 41. One end of the catheter 42 is connected to the Y-valve head end 41, and the other end is inserted into the patient's blood vessel.

[0048] In addition, a Y-valve side branch 43 is provided on the Y-valve 4 , one end of the Y-valve side branch 43 is connected to the Y-valve 4 , and the other end is communicated with the inlet 2121 on the sealing cover 212 .

[0049] The recovery component 3 includes a blood recovery bag 31, and a recovery tube 32 is arranged between the blood recovery bag 31 and the suction housing 11, one end of the recovery tube 32 is connected to another extension port 122 on the suction jacket 12, and the other end is connected to the blood recovery bag 31. Further, a second switch valve 33 and a second one-way valve 34 are arranged on the pipeline of the recovery tube 32, and the mechanism of the second one-way valve 34 is the same as that acting on the first one-way valve 162, and the direction of the second one-way valve 34 is opposite to that of the first one-way valve 162, and the second one-way valve 34 realizes that the fluid / gas / thrombus can only flow from the suction housing 11 to the blood recovery bag 31, otherwise the second one-way valve 34 is in a closed state.

[0050] Furthermore, the second switch valve 33 controls the opening or closing of the recovery pipe 32 .

[0051] Before use, close the first switch valve 161 and the second switch valve 33 at the same time, insert one end of the catheter 42 into the patient's blood vessel, and when the end of the catheter 42 moves to the thrombus, the catheter 42 stops moving, and the handle 14 is moved to the side away from the suction sleeve 12. During the movement of the handle 14, the spring 134 is compressed. At this time, the blood receiving chamber 121 of the suction sleeve 12 is in a negative pressure state. At this time, the locking block 15 is slid to the side close to the handle 14, and the locking block 15 limits the stopper 141 of the handle 14, so that the handle 14 can be locked on the suction shell 11.

[0052] Open the first switch valve 161. At this time, the suction shell 11 generates negative pressure to attract the blood clot in the blood vessel. The blood clot passes through the catheter 42 and the Y-valve side branch 43 and flows into the shell 211 from the inlet 2121 of the sealing cover 212. After the blood clot in the blood is filtered by the filter membrane 22, the blood flows through the filter hole 221 on the filter membrane 22, and then the blood flows out from the outlet 2111 of the shell 211. After flowing through the first one-way valve 162 and the first switch valve 161, the blood flows into the blood receiving chamber 121 of the suction shell 11.

[0053] Close the first switch valve 161, open the second switch valve 33, and then the locking block 15 unlocks the handle 14. At this time, the handle 14 is under the restoring force of the spring 134, and the blood is discharged from the suction housing 11. The blood passes through the second one-way valve 34 and the second switch valve 33 in sequence and enters the blood recovery bag 31. Since the silicone sheet 1622 is made of silicone, and the gap between the guide slits 16221 on the silicone sheet 1622 is small, when the blood flows in the reverse direction, the silicone sheet 1622 will be deformed to the side close to the guide slit 16221 under the action of the blood, so that the guide slit 16221 is in a closed state. The blood in the blood recovery bag 31 can be repeatedly recovered into the human body after aseptic operation to complete blood recovery.

[0054] Example 2

[0055] Reference Figure 1, open the first switch valve 161 and the second switch valve 33, close the third switch valve 5, when the handle 14 is pulled back, the handle 14 is not locked by the locking block 15, at this time, the blood and thrombus mixture in the blood vessel is continuously sucked, and the sucked blood and thrombus mixture is filtered by the filter membrane 22 and recovered into the blood recovery bag 31, and the handle 14 is reset under the restoring force of the spring 134, because the second one-way valve 34 allows blood to flow only from the blood receiving chamber 121 to the blood recovery bag 31, otherwise it is in a closed state. The human hand intermittently pulls the handle 14, so that the blood recovery bag 31 of the suction jacket 12 continuously generates negative pressure, and the negative pressure can be continuously enhanced, and the suction force increases synchronously, which has a better suction effect on the thrombus. At the same time, because the doctor manually operates the handle 14, the doctor's hand can feel the pressure change in the suction shell 211, which is convenient for the doctor to perceive during the operation and reduce the risk during the operation.

[0056] Example 3

[0057] Reference Figure 1 The third switch valve 5 is installed on the extension port 122 of the suction housing 211, and the third switch valve 5 controls the conduction or closing of the suction housing 11. The third switch valve 5 is connected to the suction housing 211 as a female Luer with a threaded locking connector, and the other side is a male Luer connector.

[0058] When in use, the filtered blood is sucked into the blood receiving chamber 121 of the suction housing 11, and then the first switch valve 161 and the second switch valve 33 are closed. A 60 ml threaded syringe can be threadedly connected to the third switch valve 5 through the Luer interface at the head end. The air inside the threaded syringe is evacuated in advance before use. After the threaded syringe is connected to the third switch valve 5, the core of the threaded syringe is pulled backward to put the inside of the threaded syringe in a negative pressure state. By opening the third switch valve 5, the blood in the suction jacket 12 is sucked into the syringe. After aseptic operation, it can be repeatedly recovered into the human body to complete blood recovery.

[0059] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A thrombus aspiration device, characterized in that: include: A suction assembly (1), the suction assembly (1) comprising a suction shell (11), a blood receiving chamber (121) being formed in the suction shell (11), a core rod (13) being arranged on the suction shell (11), the core rod (13) sliding in the blood receiving chamber (121), and as the core rod (13) slides, negative pressure is formed in the blood receiving chamber (121); A filter assembly (2), the filter device comprising a filter housing (21), the filter housing (21) being provided with an outlet (2111) and an inlet (2121), the outlet (2111) being in communication with the blood receiving chamber (121), and the inlet (2121) being in communication with a patient's blood vessel; A recovery component (3), the recovery component (3) is connected to the blood receiving chamber (121), and the recovery component (3) recovers the blood after being drawn from the patient.

2. A thrombus aspiration device according to claim 1, characterized in that: A suction jacket (12) is installed in the suction shell (11), the blood collecting chamber (121) is formed in the suction jacket (12), a core plate (131) is provided at one end of the core rod (13), a sealing ring (132) is sleeved on the core plate (131), and the sealing ring (132) and the suction jacket (12) are sealed by interference fit.

3. A thrombus aspiration device according to claim 2, characterized in that: A handle (14) is provided on the suction shell (11), the core rod (13) is connected to the handle (14), a spring (134) is provided between the core plate (131) and the suction shell (11), and the spring (134) is pressed against the core plate (131); a locking block (15) is slidably installed on the suction shell (11), and the locking block (15) locks the handle (14).

4. A thrombus aspiration device according to claim 1, characterized in that: A filter membrane (22) is installed in the filter housing (21), and filter holes (221) are provided on the filter membrane (22). A plurality of filter holes (221) are provided at intervals on the filter membrane (22).

5. The thrombus aspiration device according to claim 1, characterized in that: The recovery component (3) comprises a blood recovery bag (31), and the blood recovery bag (31) is connected to the blood receiving chamber (121).

6. A thrombus aspiration device according to claim 5, characterized in that: A first switch valve (161) and a first check valve (162) are arranged between the suction shell (11) and the filter shell (21), and the first switch valve (161) adjusts the conduction / closed state between the suction shell (11) and the filter shell (21). A second switch valve (33) and a second check valve (34) are arranged between the suction shell (11) and the blood recovery bag (31), and the second switch valve (33) adjusts the conduction / closed state between the suction shell (11) and the blood recovery bag (31).

7. A thrombus aspiration device according to claim 6, characterized in that: The suction housing (11) is provided with a third switch valve (5), and the third switch valve (5) adjusts the on / off state of the blood receiving chamber (121).

8. The thrombus aspiration device according to claim 1, characterized in that: A Y-valve (4) is provided on one side of the filter housing (21); a Y-valve head end (41) is provided on the Y-valve (4); a catheter (42) is connected to the Y-valve head end (41); the catheter (42) penetrates into a patient's blood vessel; a Y-valve side branch (43) is provided on the Y-valve (4); the Y-valve side branch (43) is communicated with an inlet (2121) of the filter housing (21).

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