Thrombus aspiration device

Abstract

The utility model relates to the technical field of medical instruments, in particular to a thrombus aspiration device. The device comprises a piston cylinder assembly, a fixed handle, a movable handle, a storage container and a filter screen, a negative pressure cavity is formed in the piston cylinder assembly, and the piston cylinder assembly is provided with an inlet and an outlet which are communicated with the negative pressure cavity; the fixed handle is fixedly arranged on the piston cylinder assembly and hinged to the movable handle, and the movable handle is in transmission connection with the piston cylinder assembly. In the relative rotation process of the fixed handle and the movable handle, negative pressure is formed in the negative pressure cavity; an inlet of the storage container is communicated with an outlet of the piston cylinder assembly; the filter screen is fixedly arranged in the storage container and located between the inlet of the storage container and the outlet of the storage container. The thrombus aspiration device removes thrombus in a manual aspiration mode, and has the advantages of being convenient to use at any time, easy to operate, small in size, low in cost and the like; meanwhile, thrombus and blood can be separated through the storage container, and blood recycling is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical equipment technical field especially is involved in a kind of thrombus suction device. BACKGROUND

[0002] Thrombus is the small piece formed on the surface of blood flow in the vascular surface of cardiovascular system or repair place. In variable fluid-dependent type, thrombus is composed of insoluble fibrin, deposited platelets, accumulated leukocytes and trapped red blood cells, and there are blockages such as deposits and plaques, which form thrombus obstruction or interrupt blood flow, leading to local tissue necrosis, affecting human health, and even threatening life.

[0003] At present, thrombus suction equipment is usually used to extract thrombus from the human body. The existing thrombus suction equipment, as disclosed in patent number CN202211372787.5, includes a negative pressure generating device and a thrombus collection assembly. The negative pressure generating device includes a housing, a negative pressure pump, and a negative pressure control assembly. The negative pressure pump and the negative pressure control assembly are arranged in the housing. The negative pressure pump is connected to the thrombus collection assembly through a pipeline. The negative pressure control assembly is connected to the pipeline and is used to control the suction negative pressure of the thrombus suction system by controlling the on-off of the pipeline.

[0004] As mentioned above, the existing thrombus suction equipment mostly uses a negative pressure pump and a negative pressure control assembly to suction thrombus, which has the defects of inconvenient use at any time, complex operation, large volume, and high cost. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a thrombus suction device to solve the technical problems of inconvenient use at any time, complex operation, large volume, and high cost of the existing thrombus suction equipment.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0007] A thrombus suction device includes a piston-cylinder assembly, a fixed handle, a movable handle, a storage container, and a filter screen, wherein:

[0008] The piston-cylinder assembly is provided with a negative pressure cavity, and the piston-cylinder assembly has an inlet and an outlet communicating with the negative pressure cavity;

[0009] The fixed handle is fixedly arranged on the piston-cylinder assembly and hinged to the movable handle, and the movable handle is in transmission connection with the piston-cylinder assembly. During the relative rotation of the fixed handle and the movable handle, a negative pressure is formed in the negative pressure cavity;

[0010] The inlet of the storage container is in communication with the outlet of the piston-cylinder assembly;

[0011] The filter screen is fixed in the storage container and located between the inlet of the storage container and the outlet of the storage container.

[0012] Further, a first one-way valve is arranged at the inlet of the piston-cylinder assembly, and a second one-way valve is arranged at the outlet of the piston-cylinder assembly.

[0013] Further, the piston-cylinder assembly comprises a first housing, a first end cover, a plug, and a piston rod, wherein:

[0014] The first end cover covers the opening of the first housing, and the negative pressure cavity is formed between the first end cover and the first housing;

[0015] The plug is slidingly arranged in the negative pressure cavity;

[0016] One end of the piston rod is rotatably connected to the plug, and the other end of the piston rod penetrates out of the negative pressure cavity and is rotatably connected to the movable handle.

[0017] Further, the first end cover is connected to the fixed handle, and a guide hole for the piston rod to penetrate through is formed in the end plate of the first end cover and the fixed handle, respectively.

[0018] Further, at least one clamping hole is arranged on the end plate of the first end cover, and at least one clamping block is arranged on the fixed handle, and the clamping blocks are correspondingly arranged in the clamping holes.

[0019] Further, an elastic member is connected between the fixed handle and the movable handle, and is used to provide an elastic force for the end of the movable handle connected to the piston rod to be close to the fixed handle.

[0020] Further, the elastic member is a torsion spring.

[0021] The thrombus suction device further comprises a rotating shaft, and the fixed handle, the torsion spring, and the movable handle are sleeved on the rotating shaft.

[0022] Further, the middle part of the fixed handle and the middle part of the movable handle are hingedly connected through the rotating shaft, one end of the fixed handle is fixedly arranged on the piston-cylinder assembly, and one end of the movable handle is drivingly connected to the piston-cylinder assembly.

[0023] Further, the movable handle is provided with a slot for the end of the piston rod to be inserted into.

[0024] The thrombus suction device further comprises a pin shaft, and the pin shaft penetrates through the slot walls on both sides of the slot and the piston rod.

[0025] Further, the storage container comprises a second shell and a second end cover covering the opening of the second shell, and the filter screen is clamped between the second end cover and the second shell.

[0026] The utility model discloses beneficial effect has:

[0027] The utility model discloses a thrombus suction device includes piston cylinder subassembly, fixed handle, movable handle, storage container and filter screen, wherein: the piston cylinder subassembly is equipped with negative pressure chamber, and the piston cylinder subassembly has the inlet and outlet with negative pressure chamber intercommunication, the fixed handle is fixed on the piston cylinder subassembly and is hinged with movable handle, and movable handle is transmission connection with piston cylinder subassembly, in the process of relative rotation of fixed handle and movable handle, the negative pressure chamber forms negative pressure, the inlet of storage container is connected with the outlet of piston cylinder subassembly, and the filter screen is fixed in the storage container and is located between the inlet of storage container and the outlet of storage container. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiment or prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0029] Figure 1 It is the front view schematic diagram of the thrombus suction device provided by the utility model embodiment one;

[0030] Figure 2 It is the axial section schematic diagram of the storage container provided by the utility model embodiment one;

[0031] Figure 3 It is the partial three-dimensional schematic diagram of the thrombus suction device provided by the utility model embodiment one;

[0032] Figure 4 It is the partial overhead schematic diagram of the thrombus suction device provided by the utility model embodiment one;

[0033] Figure 5 It is Figure 4 The sectional view at A-A;

[0034] Figure 6 It is the exploded view of the first end cover and fixed handle provided by the utility model embodiment one;

[0035] Figure 7 The assembly drawing of the first end cover and the fixed handle is provided for the embodiment one of the utility model;

[0036] Figure 8 The cross section schematic view of the thrombus suction device is provided for the embodiment two of the utility model.

[0037] Icon:

[0038] 1-piston cylinder assembly;11-first shell;12-first end cover;121-clamping hole;122-first guide hole;13-plug;14-piston rod;2-fixed handle;21-clamping block;22-second guide hole;3-movable handle;4-storage container;41-second shell;42-second end cover;5-filter screen;6-first check valve;7-second check valve;8-elastic member;9-rotating shaft;10-pivot. DETAILED DESCRIPTION

[0039] The technical scheme of the utility model will be described below in conjunction with the embodiments, obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the protection scope of the utility model.

[0040] It should be noted that in the description of the utility model, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0041] It should be noted that in the description of the utility model, the terms "connection" and "installation" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection;It can be directly connected, or connected through an intermediate medium;It can be mechanical connection, or electrical connection. For the person skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific situation.

[0042] Embodiment one

[0043] The utility model embodiment one provides a kind of thrombus suction device, refer to Figure 1 And Figure 2The thrombus suction device comprises a piston-cylinder assembly 1, a fixed handle 2, a movable handle 3, a storage container 4 and a filter screen 5, wherein:

[0044] The piston-cylinder assembly 1 is provided with a negative pressure cavity, and has an inlet and an outlet which are in communication with the negative pressure cavity;

[0045] The fixed handle 2 is fixedly arranged on the piston-cylinder assembly 1 and is hingedly connected with the movable handle 3, and the movable handle 3 is in transmission connection with the piston-cylinder assembly 1; during relative rotation of the fixed handle 2 and the movable handle 3, a negative pressure is formed in the negative pressure cavity;

[0046] The inlet of the storage container 4 is in communication with the outlet of the piston-cylinder assembly 1;

[0047] The filter screen 5 is fixedly arranged in the storage container 4 and is located between the inlet of the storage container 4 and the outlet of the storage container 4.

[0048] In use, one end of a catheter is inserted into a blood vessel and is sent to a thrombus position, and the other end of the catheter is connected to the inlet of the piston-cylinder assembly 1; then, a doctor holds the fixed handle 2 and the movable handle 3 at the same time and rotates them relative to each other, at this time, a negative pressure is formed in the negative pressure cavity of the piston-cylinder assembly 1, and thrombus mixed with blood is sucked into the negative pressure cavity under the action of the negative pressure, and then enters the storage container 4 from the negative pressure cavity; finally, under the action of the filter screen 5, the blood flows out of the outlet of the storage container 4, and the thrombus is intercepted in the storage container 4, so that the blood is filtered.

[0049] As described above, the thrombus suction device provided by the application removes thrombus by manual suction, and the doctor can hold the handle with one hand, has the advantages of convenient use at any time, simple operation, small size and low cost, and is suitable for occasions with small amount of thrombus. At the same time, the storage container 4 can separate thrombus and blood, which is convenient for recycling blood.

[0050] Continuing to refer to Figure 1 In some embodiments, a first one-way valve 6 is arranged at the inlet of the piston-cylinder assembly 1, and a second one-way valve 7 is arranged at the outlet of the piston-cylinder assembly 1. The first one-way valve 6 is connected between the inlet of the piston-cylinder assembly 1 and the catheter inserted into the human body, and the second one-way valve 7 is connected between the outlet of the piston-cylinder assembly 1 and the inlet of the storage container 4. The first one-way valve 6 and the second one-way valve 7 can prevent the thrombus and blood from flowing back.

[0051] On the basis of the above structure, the outlet of the storage container 4 is provided with external threads or internal threads, and a blood storage container can be connected to the external threads or internal threads of the outlet of the storage container 4, so as to collect the blood flowing out of the outlet of the storage container 4.

[0052] Referring to Figure 2In some embodiments, the storage container 4 comprises a second shell 41 and a second end cover 42, the second end cover 42 covers the opening of the second shell 41, and the filter screen 5 is clamped between the second end cover 42 and the second shell 41. Specifically, the second end cover 42 is screwed to the second shell 41, and the filter screen 5 is laid flat at the connection position of the second end cover 42 and the second shell 41. When it is necessary to take out the thrombus in the storage container 4 or replace the filter screen 5, the second end cover 42 can be easily unscrewed from the second shell 41, and the filter screen 5 can be conveniently taken out.

[0053] Referring to Figures 3 to 5 In some embodiments, the piston-cylinder assembly 1 comprises a first shell 11, a first end cover 12, a plug 13, and a piston rod 14, wherein:

[0054] The first end cover 12 covers the opening of the first shell 11, and a negative pressure cavity is formed between the first end cover 12 and the first shell 11;

[0055] The plug 13 is slidingly arranged in the negative pressure cavity;

[0056] One end of the piston rod 14 is rotationally connected to the plug 13, and the other end of the piston rod 14 penetrates out of the negative pressure cavity and is rotationally connected to the movable handle 3.

[0057] Specifically, the first end cover 12 is screwed to the first shell 11; a guide hole for the piston rod 14 to penetrate through is formed in the end plate of the first end cover 12 and the fixed handle 2 respectively, one end of the piston rod 14 is rotationally connected to the plug 13 through a pin shaft 10, the other end of the piston rod 14 penetrates through the guide hole and is rotationally connected to the movable handle 3 through another pin shaft 10; the two ends of the pin shaft 10 can be limited by nuts and / or shaft heads. When the fixed handle 2 and the movable handle 3 are relatively rotated, the movable handle 3 drives the plug 13 to reciprocate in the negative pressure cavity through the piston rod 14, so as to form negative pressure in the negative pressure cavity.

[0058] In actual use, the problem that the thrombus in the negative pressure cavity cannot be completely discharged outward may occur. When the amount of thrombus in the negative pressure cavity is too much to affect the pumping effect, the first shell 11 can be disassembled and the thrombus can be poured out, or the first shell 11 can be directly replaced.

[0059] In some embodiments, the first shell 11 and the storage container 4 are both made of transparent or translucent material, so as to facilitate the viewing of the amount of thrombus pumped out.

[0060] Referring to Figure 6 A first guide hole 122 is formed in the end plate of the first end cover 12, a second guide hole 22 is formed in the fixed handle 2, and the first guide hole 122 and the second guide hole 22 correspond to each other; both the first guide hole 122 and the second guide hole 22 are long holes, so as to leave a movement amount for the piston rod 14.

[0061] Referring to Figure 6 and Figure 7 In some embodiments, the end plate of the first end cover 12 is provided with at least one clamping hole 121, and the fixing handle 2 is provided with at least one clamping block 21 which is correspondingly arranged in the clamping hole 121. In the present embodiment, the number of clamping holes 121 is two and they are arranged on opposite sides of the first guide hole 122; correspondingly, the number of clamping blocks 21 is two and they are arranged on opposite sides of the second guide hole 22. The above arrangement facilitates the assembly and disassembly of the fixing handle 2 and the first end cover 12, so that the first shell 11 or the entire piston cylinder assembly 1 can be replaced as consumables.

[0062] In other embodiments, the fixing handle 2 and the first end cover 12 can also be integrally formed or threadedly connected.

[0063] Continuing to refer to Figure 5 In some embodiments, the thrombus aspiration device further comprises an elastic member 8 connected between the fixing handle 2 and the movable handle 3, for providing an elastic force to make the end of the movable handle 3 connected with the piston rod 14 close to the fixing handle 2. In use, the fixing handle 2 and the movable handle 3 can be automatically reset under the action of the elastic member 8, improving the convenience of use.

[0064] In the present embodiment, the elastic member 8 is a torsion spring; the thrombus aspiration device further comprises a rotating shaft 9, and the fixing handle 2, the torsion spring and the movable handle 3 are all sleeved on the rotating shaft 9. Specifically, the middle part of the fixing handle 2 and the middle part of the movable handle 3 are hingedly connected through the rotating shaft 9, one end of the fixing handle 2 is fixedly arranged on the piston cylinder assembly 1, and one end of the movable handle 3 is drivingly connected with the piston cylinder assembly 1; the torsion spring is arranged between the fixing handle 2 and the movable handle 3 and is sleeved on the rotating shaft 9, and two pins of the torsion spring are respectively abutted against the fixing handle 2 and the movable handle 3. The torsion spring can provide an elastic force to drive the end of the fixing handle 2 connected with the piston cylinder assembly 1 and the end of the movable handle 3 connected with the piston cylinder assembly 1 to approach each other, that is, the torsion spring can provide an elastic force to drive the plug 13 to move away from the fixing handle 2.

[0065] In some embodiments, the movable handle 3 is provided with a slot for inserting the end of the piston rod 14; one of the pin shafts 10 of the thrombus aspiration device penetrates through the two side walls of the slot and the piston rod 14. The provision of the slot can limit the relative position of the movable handle 3 and the end of the piston rod 14, so that they can only rotate relative to each other around the axis of the pin shaft 10.

[0066] In some embodiments, the lower half of the fixed handle 2 and the lower half of the movable handle 3 are both arc-shaped structures that better fit the shape of the hand, making single-handed operation more convenient and effortless, and relieving hand fatigue. The front side of the fixed handle 2 may also be provided with multiple grooves for separating fingers (not shown in the figure), making it less likely for the hand to slip relative to the handle.

[0067] Example 2

[0068] like Figure 8 As shown, the thrombus aspiration device provided in this embodiment differs from that in Embodiment 1 only in that, in this embodiment, the end plate of the first housing 11 is connected to the fixed handle 2, and the end of the first housing 11 facing away from the fixed handle 2 is an open end; the first end cap 12 is screwed to the open end of the first housing 11, and has an outlet and an inlet. A sealing ring is provided between the first end cap 12 and the first housing 11 to improve the sealing of the negative pressure chamber. At least one snap-fit ​​hole 121 is provided on the end plate of the first housing 11, and at least one snap-fit ​​block 21 is provided on the fixed handle 2, with each snap-fit ​​block 21 corresponding to and snapping into the snap-fit ​​hole 121. The thrombus aspiration device provided in this embodiment is substantially the same as that in Embodiment 1, and will not be described again here.

[0069] In summary, the thrombus aspiration device provided in this application has advantages such as ease of use, compact structure, low cost, and convenient replacement of consumables. It can also separate thrombi and blood and recover the blood. In addition, the special structure of the fixed handle 2 and the movable handle 3 can alleviate hand fatigue and facilitate continuous aspiration operations.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A thrombus aspiration device, characterized in that, It includes a piston cylinder assembly (1), a fixed handle (2), a movable handle (3), a storage container (4), and a filter screen (5), wherein: The piston cylinder assembly (1) is provided with a negative pressure chamber, and the piston cylinder assembly (1) has an inlet and an outlet communicating with the negative pressure chamber; The fixed handle (2) is fixed on the piston cylinder assembly (1) and hinged to the movable handle (3). The movable handle (3) is connected to the piston cylinder assembly (1) in a transmission manner. During the relative rotation of the fixed handle (2) and the movable handle (3), a negative pressure is formed in the negative pressure chamber. The inlet of the storage container (4) is connected to the outlet of the piston cylinder assembly (1); The filter screen (5) is fixed inside the storage container (4) and located between the inlet and outlet of the storage container (4).

2. The thrombus aspiration device according to claim 1, characterized in that, A first check valve (6) is provided at the inlet of the piston cylinder assembly (1), and a second check valve (7) is provided at the outlet of the piston cylinder assembly (1).

3. The thrombus aspiration device according to claim 1, characterized in that, The piston cylinder assembly (1) includes a first housing (11), a first end cap (12), a plug (13), and a piston rod (14), wherein: The first end cap (12) covers the opening of the first housing (11), and the negative pressure cavity is formed between the first end cap (12) and the first housing (11); The plug (13) is slidably disposed within the negative pressure chamber; One end of the piston rod (14) is rotatably connected to the plug (13), and the other end of the piston rod (14) passes through the negative pressure chamber and is rotatably connected to the movable handle (3).

4. The thrombus aspiration device according to claim 3, characterized in that, The first end cap (12) is connected to the fixed handle (2). The end plate of the first end cap (12) and the fixed handle (2) are respectively provided with guide holes for the piston rod (14) to pass through.

5. The thrombus aspiration device according to claim 3, characterized in that, The end plate of the first end cap (12) is provided with at least one snap-fit ​​hole (121), and the fixed handle (2) is provided with at least one snap-fit ​​block (21), and the snap-fit ​​blocks (21) are corresponding to and snapped into the snap-fit ​​hole (121).

6. The thrombus aspiration device according to claim 3, characterized in that, It also includes an elastic element (8) connected between the fixed handle (2) and the movable handle (3) for providing a spring force to bring the end of the movable handle (3) connected to the piston rod (14) closer to the fixed handle (2).

7. The thrombus aspiration device according to claim 6, characterized in that, The elastic element (8) is a torsion spring; The thrombus aspiration device also includes a rotating shaft (9), and the fixed handle (2), the torsion spring and the movable handle (3) are all mounted on the rotating shaft (9).

8. The thrombus aspiration device according to claim 7, characterized in that, The middle part of the fixed handle (2) and the middle part of the movable handle (3) are hinged together by the pivot (9). One end of the fixed handle (2) is fixed on the piston cylinder assembly (1), and one end of the movable handle (3) is connected to the piston cylinder assembly (1) in a transmission manner.

9. The thrombus aspiration device according to claim 3, characterized in that, The movable handle (3) is provided with a slot for inserting the end of the piston rod (14); The thrombus aspiration device also includes a pin (10) that passes through the two side walls of the slot and the piston rod (14).

10. The thrombus aspiration device according to any one of claims 1 to 9, characterized in that, The storage container (4) includes a second housing (41) and a second end cap (42), the second end cap (42) covering the opening of the second housing (41), and the filter screen (5) being clamped between the second end cap (42) and the second housing (41).

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