A semi-automatic thrombus negative pressure aspiration device

Abstract

The present invention provides a semi-automatic thrombus negative pressure aspiration device, which is mainly composed of a vacuum pump, a vacuum air bag, a handheld driver, an outer tube pressure regulating valve, a Y-shaped connector, an inner tube pressure regulating valve, an inner tube feeding mechanism, and a push-and-shake feeding device. The vacuum pump is used to maintain a set vacuum degree in the vacuum air bag. An outer tube pressure regulating valve and an inner tube pressure regulating valve are provided to adjust the pressure of the inner tube and the combined tube respectively. In the process of aspirating thrombus, it can be controlled according to actual conditions and has better adaptability. By providing an inner tube feeding mechanism and a push-and-shake feeding device, the feeding of the tube is automatically controlled, which reduces the accuracy of manual tube feeding and improves efficiency. The present invention is easy to use, has a simple and clear structure, can replace the purely manual thrombus aspiration pump in the current prior art to a certain extent, and has good practical application prospects.

Description

Technical Field

[0001] The present invention relates to a thrombus negative pressure aspiration device, in particular to a semi-automatic thrombus negative pressure aspiration device. Background Art

[0002] Endovascular thrombectomy is currently an important treatment for acute cerebral infarction, playing a crucial role in rapidly recanalizing occluded cerebral vessels. Commonly used thrombectomy methods include stent-assisted thrombectomy and direct thrombus aspiration. In both approaches, a negative pressure aspiration device connected to a catheter is used to aspirate the thrombus or prevent its escape.

[0003] Commonly used negative pressure suction devices include ordinary syringes and mechanical negative pressure suction pumps. Ordinary syringes are mostly 50ml syringes. The syringe nipple is connected to the end of the catheter, and continuous suction is applied by both hands to create negative pressure and thus aspirate blood clots. In addition, there are mechanical negative pressure suction pumps. This device is connected to the catheter and automatically mechanically suctions to achieve continuous negative pressure.

[0004] The advantages of standard 50ml syringes and bayonet syringes are their low price and ability to provide negative pressure suction, but they require an assistant to operate them with both hands, maintain continuous suction, and lack a visual display of pressure changes. Mechanical negative pressure suction pumps offer the advantage of continuous negative pressure suction, but they are expensive, non-disposable, and require training to operate.

[0005] During manual insertion of a combined tube, it is often necessary to rotate the combined tube or to advance or withdraw it to ensure smooth advancement within the blood vessel. However, this action is highly influenced by experience and standardized movement is difficult to achieve. Summary of the Invention

[0006] In response to the technical problems and needs mentioned in the prior art, the present invention provides a semi-automatic thrombus negative pressure aspiration device.

[0007] The technical solution of the present invention mainly comprises: a vacuum pumping device (1), a vacuum air bag (10), a push-shake feeding device (43), an outer tube pressure regulating valve (12), a Y-shaped joint (20), an inner tube pressure regulating valve (21), an inner tube feeding mechanism (26), and a merging tube feeding mechanism (33); wherein: the vacuum pumping device (1) is connected to the vacuum air bag (10);

[0008] The vacuum air bag (10) is connected to the merging pipe (32) and the inner pipe (30) through the outer pipe pressure regulating valve (12) and the inner pipe pressure regulating valve (21) respectively; the Y-shaped joint (20) is fixed in the merging pipe feeding mechanism (43), and the inner pipe (30) is inserted into the merging pipe (32) through the Y-shaped joint (20); the inner pipe feeding mechanism (26) drives the inner pipe (30) to feed, and the merging pipe feeding mechanism (33) drives the merging pipe (32) to feed.

[0009] The inner tube feeding mechanism (26) and the merging tube feeding mechanism (33) can be roller-type linear driving mechanisms, or other mechanisms with the function of linearly advancing the wire.

[0010] The present invention maintains a set vacuum degree in a vacuum bag (10) through the action of a vacuum pumping device (1). An automatic feedback system can also be added to automatically maintain the vacuum degree at a certain level. The vacuum bag (10) is provided to maintain a stable vacuum degree without the need to continuously operate the vacuum pumping device (1).

[0011] The outer tube pressure regulating valve (12) and the inner tube pressure regulating valve (21) are provided to regulate the pressure of the inner tube (30) and the combined tube (32) respectively. In the process of thrombus aspiration, control can be performed according to actual conditions, and the process has better adaptability.

[0012] By arranging the inner tube feeding mechanism (26) and the combined tube feeding mechanism (33), the feeding of the tubes is automatically controlled. At the same time, the combined tube (32) is rotated and advanced and retreated by the pushing and shaking feeding device (43), thereby improving the accuracy of manual tube feeding and increasing efficiency.

[0013] The present invention is easy to use and has a simple and clear structure, and can replace the purely manual thrombus aspiration pump in the current prior art to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below with reference to the accompanying drawings.

[0015] Figure 1 It is a structural block diagram of the electrical system of the present invention.

[0016] Figure 2 It is a top view of the portable driver of the present invention.

[0017] Figure 3 It is a partial cross-sectional schematic diagram of the push-remote control device of the present invention.

[0018] Figure 4 It is a structural diagram of the Y-shaped joint of the present invention.

[0019] Figure 5 It is a partial cross-sectional schematic diagram of the present invention.

[0020] Figure 6 It is a schematic diagram of thrombus removal according to the present invention.

[0021] in:

[0022] 1-vacuum pumping device, 2-piston, 3-piston operating handle, 4-first cavity, 5-second cavity, 6-first one-way air inlet valve, 7-first one-way exhaust valve, 8-second one-way air inlet valve, 9-second one-way exhaust valve, 10-vacuum air bag, 102-air bag pressure reducing valve, 11-handheld driver, 12-external tube pressure regulating valve, 13-pressure regulating knob, 14-vacuum pressure gauge, 15-external tube filter, 16-external first connecting pipe, 17-internal first connecting pipe, 18-connector, 19-lower fixed joint, 20-Y-shaped joint, 21-internal tube pressure regulating valve, 24-internal tube filter, 25-external second connecting pipe, 26-internal tube feeding mechanism, 27-internal tube driving wheel , 28-inner tube passive wheel, 29-sealing connector, 30-inner tube, 31-upper fixed joint, 32-merged tube, 33-merged tube feeding mechanism, 34-merged tube driving wheel, 35-merged tube passive wheel, 36-inner guide nozzle, 37-speed control handwheel, 38-back button, 39-feed button, 40-display screen, 41-anti-fall wristband, 43-push-and-shake feeding device, 44-outer rocking rack, 45-drive rocking turbine, 46-drive rocking motor, 47-linear slider, 48-linear guide rail, 49-drive straight mechanism, 50-outer guide head, 51-floating ring, 52-peripheral elastic element, 53-floating ring hole, 54-conductive contact, 61-vascular wall, 62-infarct. DETAILED DESCRIPTION

[0023] Typical embodiments of the present invention are described below with reference to the accompanying drawings.

[0024] like Figure 1-4 As shown:

[0025] As a preferred embodiment 1, as described in the summary of the invention.

[0026] As a preferred embodiment 2: the vacuum pumping device (1) is a vacuum pumping device with a two-way vacuum pumping function having a piston (2) and a piston operating handle (3). It comprises: an upper vacuum pumping structure consisting of a first cavity (4), a first one-way air inlet valve (6), and a first one-way air exhaust valve (7); and a lower vacuum pumping structure consisting of a second cavity (5), a second one-way air inlet valve (8), and a second one-way air exhaust valve (9).

[0027] The structural design enables the vacuum pumping device to realize the vacuum pumping function in both the upper and lower strokes, thereby improving the efficiency of vacuum pumping. Due to the energy storage function of the vacuum air bag (10), the vacuum pumping device can be manually operated periodically to meet the use requirements. The vacuum air bag (10) has a vacuum pressure gauge (14) and an air bag pressure reducing valve (102) to prevent the vacuum degree from exceeding the required value.

[0028] As a preferred embodiment 3: the outer tube pressure regulating valve (12) and the inner tube pressure regulating valve (21) are provided with a vacuum pressure gauge (14), and the vacuum pressure value in each tube is adjusted by a pressure regulating knob (13).

[0029] They are connected to the handheld driver (11) through an external first connecting tube (16) and an external second connecting tube (25) respectively.

[0030] The blood in the outer filter (15) can be returned to the patient's body by other technical means. The inner filter (24) is basically a mixture of blood and thrombus, so it is no longer suitable for transport back to the patient's body. The inner filter (24) can be discarded. The function of the filter is to prevent water such as blood from entering the vacuum bag (10) as much as possible.

[0031] As a preferred embodiment 4: the inner tube feeding mechanism (26) includes an inner tube driving wheel (27) and an inner tube passive wheel (28); the merging tube feeding mechanism (33) includes a merging tube driving wheel (34) and a merging tube passive wheel (35); the tube is pushed forward or backward by squeezing the driving wheel and the passive wheel respectively; the driving wheel is driven by a motor. Through the squeezing of the driving wheel and the passive wheel, the tube can be pushed forward and straightened.

[0032] Before the inner tube (30) enters the inner tube feeding mechanism (26), the inner tube (30) is in a relaxed state, and its reserved length can be pre-cut according to actual needs.

[0033] Before the merging tube (32) enters the merging tube feeding mechanism (33), the merging tube (32) is in a relaxed state, and its reserved length can be pre-cut according to actual needs.

[0034] As a preferred embodiment 5: it also includes a speed regulating hand wheel (37) for adjusting the rotation speed of the inner tube driving wheel (27) and the combined tube driving wheel (34); it also has a back button (38) and a feed button (39) for adjusting the rotation direction of the driving wheel.

[0035] Pure manual operation of delivering the combined tube (32) into the blood vessel requires high hand feeling and experience. In comparison, automatic feeding has high stability and convenient speed adjustment.

[0036] As a preferred embodiment six: the inner tube driving wheel (27), the inner tube passive wheel (28), the combined tube driving wheel (34), and the combined tube passive wheel (35) are rubber wheels to increase friction.

[0037] The Y-shaped joint (20) is fixed by the upper fixed joint (31) and the lower fixed joint (19) at both ends. The function of the sealing connector (29) is to ensure that the merging tube (32) is in the position where the inner tube (30) enters, and the vacuum is not broken due to air leakage. However, due to the driving of the inner tube driving wheel (27), the inner tube (30) can be pushed into the Y-shaped joint (20) and then into the merging tube (32).

[0038] It should be noted that although the drawings drawn in the present invention are closed, those skilled in the art should be able to understand that the various pipelines and shells involved in the present invention are separate, and the pipelines therein are all disposable medical device consumables. Before each operation, the shell needs to be opened, the pipelines, etc. need to be inserted, passed or placed into the shell, and installed securely between the rollers.

[0039] The combined tube (32) outputs the handheld driver (11) through the inner guide nozzle (36), thereby entering the patient's blood vessel through the patient's wound.

[0040] As a preferred embodiment seven: it also includes a handheld driver (11), and the push-and-fed feeding device (43) is installed in the handheld driver (11);

[0041] It also includes an outer rocking rack (44), a rocking turbine (45), and a rocking motor (46);

[0042] The outer rocking rack (44) is semi-annular and fixedly mounted on the outer side of the push-rock feeding device (43). It is driven by a rocking turbine (45) and a rocking motor (46) fixed on the inner side of the handheld driver (11), thereby realizing radial rotation of the push-rock feeding device (43).

[0043] A linear guide rail (not shown) is installed under the driving and shaking motor (46) so that when the pushing and shaking feeding device (43) moves, the driving and shaking motor (46) can move together.

[0044] By swinging the merging tube (32) to a certain extent, the merging tube (32) is twisted, so that the guiding function of the merging tube (32) on the head can move forward more smoothly.

[0045] It should be noted that due to the elasticity of the pipeline itself, it is difficult to make the front end of the pipeline produce a corresponding rotation angle when the rotation amplitude is small. As a more preferred technical solution, it can be considered that the outer rocking rack (44) is a full circular shape, so that the rotation angle is greatly increased.

[0046] As a preferred embodiment eight: it also includes a linear slider (47), a linear guide rail (48), and a straight driving mechanism (49); the linear slider (47) is fixed to the lower outer side of the push-and-feed device (43), the linear guide rail (48) is fixed to the inner side of the handheld driver (11), the linear slider (47) and the linear guide rail (48) form a sliding pair, and the straight driving mechanism (49) drives the linear slider (47) to move linearly along the linear guide rail (48).

[0047] In actual operation, this embodiment can also not use this structure, but use the periodic forward and reverse rotation of each driving wheel to achieve a high frequency of advancement and retraction of the pipeline, similar to the state of "shaking forward". Both solutions are based on the premise that the pipeline has high hardness.

[0048] As a preferred embodiment nine: further comprising an outer guide head (50), a floating ring (51), a peripheral elastic element (52), a floating ring hole (53) and a conductive contact (53);

[0049] The conductive contact (53) is installed between the floating ring (51) and the outer guide head (50), and the relative position between the floating ring (51) and the outer guide head (50) is maintained by the peripheral elastic element (52).

[0050] When the merging tube (32) encounters an obstacle in front, there will be a backward thrust, and the merging tube (32) located in the outer guide head (50) will have a tendency to bend, thereby pushing the floating ring (51) to deflect to one side, thereby pushing the conductive contact (53) on that side to close. After the control system senses the closing signal, it can implement the corresponding rotation or push-pull action according to the established program.

[0051] The specific contact structure and connecting components such as wires in the present invention are conventional means in the prior art and will not be described in detail in the specification.

[0052] As a preferred embodiment ten: an anti-falling wristband (41) is provided below the handheld driver (11); the handheld driver (11) also has a built-in battery.

[0053] The schematic diagram of removing the obstruction (62) in the blood vessel wall (61) is shown in FIG. Figure 6 .

[0054] The embodiment of the present invention is an example of the content of the present invention, and the present invention can be combined with other known technologies, or can be modified by omitting a part of the part without departing from the gist of the present invention.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention and not to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention. They should all be included in the scope of the technical solution for protection of the present invention.

Claims

1. A semi-automatic thrombus negative pressure aspiration device, characterized in that It mainly consists of a vacuum pumping device (1), a vacuum air bag (10), a push-shake feeding device (43), an outer tube pressure regulating valve (12), a Y-shaped joint (20), an inner tube pressure regulating valve (21), an inner tube feeding mechanism (26), and a merging tube feeding mechanism (33); in: The vacuum pumping device (1) is connected to the vacuum air bag (10); The vacuum bag (10) is connected to the merging pipe (32) and the inner pipe (30) through the outer pipe pressure regulating valve (12) and the inner pipe pressure regulating valve (21) respectively; The Y-shaped joint (20) is fixed in the push-shake feeding device (43), and the inner tube (30) is inserted into the merging tube (32) through the Y-shaped joint (20); In the push-and-shake feeding device (43), the inner tube feeding mechanism (26) drives the inner tube (30) to feed, and the merging tube feeding mechanism (33) drives the merging tube (32) to feed; It also includes a handheld driver (11), in which the push-and-shake feeding device (43) is installed; It also includes an outer rocking rack (44), a rocking turbine (45), and a rocking motor (46); The outer rocking rack (44) is semi-circular or full-circular and is fixedly mounted on the outer side of the push-rock feeding device (43). It is driven by a rocking turbine (45) and a rocking motor (46) fixed on the inner side of the handheld driver (11), thereby realizing radial rotation of the push-rock feeding device (43). The invention also includes a linear slider (47), a linear guide rail (48), and a straight driving mechanism (49); the linear slider (47) is fixed to the lower outer side of the push-shake feeding device (43), the linear guide rail (48) is fixed to the inner side of the handheld driver (11), the linear slider (47) and the linear guide rail (48) form a sliding pair, and the straight driving mechanism (49) drives the linear slider (47) to move linearly along the linear guide rail (48).

2. A semi-automatic thrombus negative pressure aspiration device according to claim 1, characterized in that The vacuum pumping device (1) is a vacuum pumping device with a two-way vacuum pumping function, comprising a piston (2) and a piston operating handle (3); It has: an upper vacuum pumping structure consisting of a first cavity (4), a first one-way air inlet valve (6), and a first one-way air exhaust valve (7); A lower vacuum pumping structure is formed by a second cavity (5), a second one-way air inlet valve (8), and a second one-way air exhaust valve (9).

3. A semi-automatic thrombus negative pressure aspiration device according to claim 1 or 2, characterized in that The outer tube pressure regulating valve (12) and the inner tube pressure regulating valve (21) are provided with a vacuum pressure gauge (14).

4. A semi-automatic thrombus negative pressure aspiration device according to claim 3, characterized in that The inner tube feeding mechanism (26) includes an inner tube driving wheel (27) and an inner tube passive wheel (28); the merged tube feeding mechanism (33) includes a merged tube driving wheel (34) and a merged tube passive wheel (35); the tube is pushed forward or backward by squeezing the driving wheel and the passive wheel respectively; the driving wheel is driven by a motor.

5. A semi-automatic thrombus negative pressure aspiration device according to claim 4, characterized in that The invention also includes a speed regulating hand wheel (37) for regulating the rotation speed of the inner tube driving wheel (27) and the combined tube driving wheel (34); a back button (38) and a feed button (39) for regulating the rotation direction of the driving wheel; the speed regulating hand wheel (37), the back button (38) and the feed button (39) are signal input ports and are electrically connected to the control system.

6. A semi-automatic thrombus negative pressure aspiration device according to claim 4 or 5, characterized in that The inner tube driving wheel (27), the inner tube passive wheel (28), the combined tube driving wheel (34) and the combined tube passive wheel (35) are rubber wheels or silica gel wheels.

7. The semi-automatic thrombus negative pressure aspiration device according to claim 1, characterized in that: It also includes an outer guide head (50), a floating ring (51), a peripheral elastic element (52), a floating ring hole (53) and a conductive contact (54); The conductive contact (54) is installed between the floating ring (51) and the outer guide head (50), and the relative position between the floating ring (51) and the outer guide head (50) is maintained by the peripheral elastic element (52).

8. The semi-automatic thrombus negative pressure aspiration device according to claim 7, characterized in that: An anti-falling wristband (41) is provided below the handheld driver (11); the handheld driver (11) also has a built-in battery.

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