Negative pressure suction device for mechanical thrombus extraction

Abstract

The utility model discloses a negative pressure suction device for mechanical thrombectomy, which comprises an injector, a sealing cap, a three-way joint, a negative pressure hose and a plurality of one-way valves, the sealing cap is mounted at the tail of an empty cylinder on the injector and is in sliding sealing fit with a piston shaft, and the empty cylinder forms two variable pumping and drainage cavities through a piston and the sealing cap. The two variable pumping drainage cavities are communicated with first connectors of the two three-way connectors respectively, one negative pressure hose is communicated with second connectors of the two three-way connectors respectively, the other negative pressure hose is communicated with third connectors of the two three-way connectors respectively, and the one-way valves are installed between the negative pressure hoses and liquid outlets of the three-way connectors. The flow directions of every two adjacent one-way valves are opposite. According to the negative pressure suction device, reciprocating type double-stroke suction work can be formed by means of the injector, the negative pressure soft (guide) pipe and the like, suction work is completed twice between pulling and pushing of the injector, compared with an existing negative pressure suction device, the working efficiency is doubled, efficiency is high, existing materials are easy to obtain, and assembling is easy.

Description

Technical Field

[0001] This utility model relates to the field of medical auxiliary equipment technology, and in particular to a negative pressure suction device for mechanical thrombectomy. Background Technology

[0002] As is well known, endovascular thrombectomy is an important treatment method for the acute phase of cerebral infarction. However, current clinical thrombectomy procedures often involve specialized medical personnel using disposable syringes for aspiration, which is labor-intensive and cumbersome. This is a problem that urgently needs to be solved by those skilled in the art. Currently, a Chinese utility model patent with publication number CN215778432U, entitled "A Negative Pressure Aspirator for Thrombectomy," exists. It utilizes a syringe, a three-way valve, and two one-way valves to create negative pressure aspiration. However, this negative pressure aspirator is single-stroke; that is, when the syringe has aspirated to a certain extent, it needs to be pushed back to expel contaminated blood. This push-and-pull motion only completes one aspiration cycle, resulting in low efficiency. Utility Model Content

[0003] The purpose of this invention is to provide a negative pressure suction device for mechanical thrombectomy, so as to solve the problem that the suction work of the existing negative pressure suction device is a single stroke, and the syringe can only complete one suction with one push and one pull, resulting in low working efficiency.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A negative pressure suction device for mechanical thrombectomy includes a syringe, a sealing cap, a three-way connector, a negative pressure hose, and multiple one-way valves. The sealing cap is installed at the tail end of the empty cylinder of the syringe and slides and seals with the piston shaft. The empty cylinder forms two variable suction and discharge chambers through the piston and the sealing cap. The two variable suction and discharge chambers are respectively connected to the first interfaces of the two three-way connectors. One negative pressure hose is respectively connected to the second interfaces of the two three-way connectors, and another negative pressure hose is respectively connected to the third interfaces of the two three-way connectors. The one-way valves are installed between the outlets of the negative pressure hoses and the three-way connectors, and the flow directions of adjacent two one-way valves are opposite.

[0006] A further technical solution is that the first interface of one of the three-way connectors is connected to the nipple of the syringe.

[0007] A further technical solution is that a sliding sealing pair is installed between the sealing cap and the piston shaft.

[0008] A further technical solution is that the negative pressure hose has an opening.

[0009] A further technical solution is that one of the openings is connected to the liquid outlet of the mechanical thrombectomy device.

[0010] A further technical solution is that both the syringe and the negative pressure tubing are made of transparent medical plastic.

[0011] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0012] This utility model proposes a negative pressure suction device for mechanical thrombectomy. This negative pressure suction device can form a reciprocating double-stroke suction operation by using existing medical consumables such as syringes and negative pressure soft (guide tubes). It completes two suction operations between the pull and push of the syringe. Compared with existing negative pressure suction devices, the working efficiency is doubled. It is highly efficient, and the existing materials are readily available and the assembly is simple. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a negative pressure suction device for mechanical thrombus removal according to this utility model.

[0014] Figure 2 This utility model Figure 1 A schematic diagram of the structure when the syringe is pulled outwards.

[0015] Figure 3 This utility model Figure 1 A schematic diagram of the internal injection syringe during operation.

[0016] Reference numerals: 1. Syringe; 2. Sealing cap; 3. T-connector; 4. Negative pressure hose; 5. One-way valve; 6. Empty cylinder; 7. Piston shaft; 8. Piston; 9. Variable suction / discharge chamber; 10. Nipple. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0018] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0019] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0020] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0021] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used 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. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example

[0023] This implementation example Figure 1 , Figure 2 and Figure 3 As shown, a negative pressure suction device for mechanical thrombectomy includes a syringe 1, a sealing cap 2, a three-way connector 3, a negative pressure hose 4, and multiple one-way valves 5. The sealing cap 2 is installed at the tail of the empty cylinder 6 on the syringe 1 and slides and seals with the piston shaft 7. The empty cylinder 6 forms two variable suction and discharge chambers 9 through the piston 8 and the sealing cap 2. The two variable suction and discharge chambers 9 are respectively connected to the first interfaces of the two three-way connectors 3. One negative pressure hose 4 is respectively connected to the second interfaces of the two three-way connectors 3, and another negative pressure hose 4 is respectively connected to the third interfaces of the two three-way connectors 3. The one-way valves 5 are installed between the outlets of the negative pressure hoses 4 and the three-way connectors 3, and the flow directions of two adjacent one-way valves 5 are opposite.

[0024] The existing consumables, such as syringe 1, sealing cap 2, three-way connector 3, negative pressure hose 4, and multiple one-way valves 5, are arranged according to... Figure 1The structure is assembled using readily available materials and is simple to assemble. Furthermore, the flow directions of adjacent one-way valves 5 are opposite. When the syringe 1 is pushed or pulled, the volumes of the two variable extraction chambers 9 in the empty cylinder 6 change back and forth, creating negative pressure. When combined with the four one-way valves 5 to adjust the flow direction, a flow pattern can be formed as shown in the image. Figure 2 and Figure 3 The reciprocating double-stroke suction operation shown in the diagram generates two drainage cycles with a single push-pull of the syringe, resulting in high efficiency.

[0025] Preferably, the first interface of one of the three-way connectors 3 is connected to the nipple 10 of the syringe 1.

[0026] The existing nipple of syringe 1 facilitates assembly with tee connector 3.

[0027] Preferably, a sliding sealing pair is installed between the sealing cap 2 and the piston shaft 7.

[0028] The sliding seal pair improves the sealing effect between the sealing cap 2 and the piston shaft 7.

[0029] Preferably, the negative pressure tubing 4 has an opening. One of the openings is connected to the fluid outlet of the mechanical thrombectomy device. Both the syringe 1 and the negative pressure tubing 4 are made of transparent medical plastic. The transparent material facilitates observation of contaminated blood.

[0030] In actual use, there is no need to pay extra attention to the connection position of the mechanical bolt-removing device with both openings; it can be connected to either opening arbitrarily. Figure 2 and Figure 3 The diagram shows the connection between the outlet of the mechanical thrombectomy device and the opening on the right, the state of the one-way valve 5, and the direction of the syringe 1 being pulled. When the outlet of the mechanical thrombectomy device is connected to the opening on the left, the state of the one-way valve 5 can remain unchanged, but the direction of the blood flow and the direction of the syringe 1 being pulled both change.

[0031] This negative pressure aspiration device is not only suitable for thrombectomy, but also for other negative pressure aspiration procedures in medicine. Simply replace the corresponding parts with medical consumables of the same function.

[0032] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A negative pressure suction device for mechanical thrombectomy, characterized in that: The device includes a syringe (1), a sealing cap (2), a three-way connector (3), a negative pressure hose (4), and multiple one-way valves (5). The sealing cap (2) is installed at the tail of the empty cylinder (6) of the syringe (1) and slides and seals with the piston shaft (7). The empty cylinder (6) forms two variable suction chambers (9) through the piston (8) and the sealing cap (2). The two variable suction chambers (9) are respectively connected to the first interface of the two three-way connectors (3). One negative pressure hose (4) is respectively connected to the second interface of the two three-way connectors (3), and another negative pressure hose (4) is respectively connected to the third interface of the two three-way connectors (3). The one-way valves (5) are installed between the outlet of the negative pressure hose (4) and the three-way connector (3), and the flow directions of two adjacent one-way valves (5) are opposite.

2. The negative pressure suction device for mechanical thrombectomy according to claim 1, characterized in that: One of the three-way connectors (3) has its first port connected to the nipple (10) of the syringe (1).

3. The negative pressure suction device for mechanical thrombectomy according to claim 1, characterized in that: A sliding sealing pair is installed between the sealing cap (2) and the piston shaft (7).

4. The negative pressure suction device for mechanical thrombectomy according to claim 1, characterized in that: The negative pressure hose (4) has an opening.

5. The negative pressure suction device for mechanical thrombectomy according to claim 4, characterized in that: One of the openings is connected to the liquid outlet of the mechanical thrombectomy device.

6. The negative pressure suction device for mechanical thrombectomy according to claim 1, characterized in that: Both the syringe (1) and the negative pressure hose (4) are made of transparent medical plastic.

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