Thrombus aspiration system, aspiration negative pressure control method and device

Abstract

The present invention provides a thrombus aspiration system, a suction negative pressure control method, and a device. The system includes a negative pressure generating device and a thrombus collection component; the negative pressure generating device includes: a housing, a negative pressure pump, and a negative pressure control component; the negative pressure pump and the negative pressure control component are disposed within the housing; the negative pressure pump is connected to the thrombus collection component via a pipeline; the negative pressure control component is connected to the pipeline and is used to control the suction negative pressure of the thrombus aspiration system by controlling the on / off state of the pipeline. Embodiments of the present invention can flexibly adjust the suction force to meet the suction force requirements of different thrombi, thereby improving the suction effect while also helping to reduce blood loss.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a thrombus aspiration system, a suction negative pressure control method and a device. Background Art

[0002] Thrombotic diseases pose a serious threat to human life and health. Their incidence ranks first among all diseases and has been increasing in recent years. They are one of the focuses and hot topics of contemporary medical research. Thrombosis refers to the process by which blood flowing in the lumen of a blood vessel or cardiac cavity turns into a solid clot, which is called a thrombus or embolus. Thrombosis can occur in blood vessels anywhere in the body, blocking the lumen, causing blood flow to stop or stagnate, and triggering thrombotic diseases with high rates of disability and mortality. Diseases such as myocardial infarction, cerebral infarction, pulmonary embolism, atrial fibrillation, lower extremity venous thrombosis, and amniotic fluid embolism are all thrombotic diseases.

[0003] One method for treating thrombosis is to use the principle of negative pressure suction to remove the thrombus through a suction catheter. Existing mechanical suction devices use continuous suction, which has a constant negative pressure and low suction force, making it difficult to remove large or adherent thrombi. During continuous suction, if the doctor fails to position the active end of the suction catheter close to the thrombus site, excessive blood may be aspirated, increasing the risk of complications. Furthermore, the suction force required to aspirate thrombi that formed at different times varies, making constant-pressure suction less effective.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to ordinary technicians in this field. Summary of the Invention

[0005] The purpose of the embodiments of the present invention is to provide a thrombus aspiration system, a suction negative pressure control method and a device, which can flexibly adjust the suction force to meet the suction force requirements of different thrombi, improve the suction effect and help reduce blood loss.

[0006] In a first aspect, an embodiment of the present invention provides a thrombus aspiration system, comprising: a negative pressure generating device and a thrombus collection component;

[0007] The negative pressure generating device includes: a housing, a negative pressure pump, and a negative pressure control component; the negative pressure pump and the negative pressure control component are arranged in the housing;

[0008] The negative pressure pump is connected to the thrombus collection component through a pipeline;

[0009] The negative pressure control component is connected to the pipeline and is used to control the suction negative pressure of the thrombus suction system by controlling the on-off state of the pipeline.

[0010] In addition, the negative pressure control component includes: a control circuit board, a flow control valve and an air pressure sensor component;

[0011] The flow control valve and the air pressure sensing assembly are respectively arranged on the pipeline and are respectively connected to the control circuit board; the air pressure sensing assembly is used to detect the suction negative pressure information of the thrombus aspiration system and provide it to the control circuit board, and the control circuit board is used to control the flow control valve to open or close the pipeline according to the suction negative pressure information to control the size of the suction negative pressure of the thrombus aspiration system.

[0012] In addition, the air pressure sensing component includes: a first air pressure sensor and a second air pressure sensor; the first air pressure sensor and the second air pressure sensor are respectively arranged on the pipeline and located at both ends of the flow control valve, and are respectively used to sense the air pressure information on both sides of the flow control valve in the pipeline.

[0013] In addition, the pipeline includes: a first pipe segment, a second pipe segment, a third pipe segment and a fourth pipe segment which are sequentially connected between the thrombus collection component and the negative pressure pump;

[0014] The first air pressure sensor is arranged between the first pipe section and the second pipe section, the flow control valve is arranged between the second pipe section and the third pipe section, and the second air pressure sensor is arranged between the third pipe section and the fourth pipe section.

[0015] In addition, the first pipe section, the second pipe section and the third pipe section form a straight pipe line and are arranged parallel to the bottom surface of the shell.

[0016] In addition, the pipeline further comprises a catheter connector having one end connected to the outer end of the first pipe segment, and the other end of the catheter connector is connected to the thrombus collection assembly;

[0017] Optionally, the catheter connector and the thrombus collection assembly are detachably connected.

[0018] In addition, the negative pressure control component further includes a gear knob arranged on the outside of the shell; the gear knob is connected to the control circuit board and is used to set the suction negative pressure of the thrombus suction system.

[0019] In addition, the thrombus collection assembly includes: a sealed tank body, a first catheter and a second catheter;

[0020] The first conduit and the second conduit are respectively connected to the sealed tank body, and the second conduit is also connected to the negative pressure generating device to form a negative pressure suction air path connecting the negative pressure generating device and the first conduit;

[0021] Optionally, a thrombus filter is provided in the sealed tank body.

[0022] In addition, a first conduit joint and a second conduit joint are provided on the top cover of the sealed tank body; the first conduit joint and the second conduit joint are both communicated with the inner cavity of the sealed tank body;

[0023] The outer end of the first catheter connector is connected to the first catheter, the outer end of the second catheter connector is connected to the second catheter, and the other end of the second catheter is connected to the negative pressure generating device;

[0024] The thrombus filter is located below the first catheter connector and the second catheter connector;

[0025] Optionally, the thrombus collection assembly further includes a thrombus removal catheter connector connected to the outer end of the first catheter.

[0026] In addition, the thrombus collection assembly further comprises a diaphragm disposed at the inner end of the second catheter connector;

[0027] Optionally, the diaphragm is fixed to the second catheter connector via a snap assembly.

[0028] In a second aspect, an embodiment of the present invention provides a method for controlling negative suction pressure, which is applied to the thrombus aspiration system according to the first aspect, and the method includes:

[0029] Real-time acquisition of suction negative pressure information of the thrombus suction system after the negative pressure pump is turned on;

[0030] Obtaining the suction negative pressure of the thrombus suction system according to the suction negative pressure information; the suction negative pressure is the pressure difference between the negative pressure pump and the thrombus suction component;

[0031] If the absolute value of the suction negative pressure of the thrombus aspiration system is greater than or equal to the preset opening threshold, the aspiration pipeline of the thrombus aspiration system is opened; if the absolute value of the suction negative pressure is less than or equal to the preset closing threshold, the aspiration pipeline is closed; the preset opening threshold is greater than the preset closing threshold.

[0032] In a third aspect, an embodiment of the present invention provides a suction negative pressure control device, configured in the thrombus aspiration system as described in the first aspect, the device comprising:

[0033] an acquisition module, configured to acquire in real time the suction negative pressure information of the thrombus suction system after the negative pressure pump is turned on;

[0034] a calculation module, configured to obtain the suction negative pressure of the thrombus suction system according to the suction negative pressure information; the suction negative pressure is the pressure difference between the negative pressure pump and the thrombus suction component;

[0035] A control module is configured to open the aspiration circuit of the thrombus aspiration system if the absolute value of the negative aspiration pressure of the thrombus aspiration system is greater than or equal to a preset opening threshold, and to close the aspiration circuit if the absolute value of the negative aspiration pressure is less than or equal to a preset closing threshold; the preset opening threshold is greater than the preset closing threshold.

[0036] It can be seen from the above technical solutions that the embodiments of the present invention have at least the following advantages and positive effects:

[0037] In the thrombus aspiration system of the embodiment of the present invention, the negative pressure pump is connected to the thrombus collection component through a pipeline, and the negative pressure control component is connected to the pipeline and is used to control the suction negative pressure of the thrombus aspiration system by controlling the on-off of the pipeline. By controlling the suction negative pressure of the thrombus aspiration system, the suction negative pressure can be flexibly adjusted during the suction process to meet the suction force requirements of different thrombi, improve the suction effect, and especially improve the success rate of aspiration of thrombi that require a large suction force. At the same time, it is beneficial to reduce the amount of bleeding during the suction process, reduce the risk of complications, and improve the treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. It can be understood that the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0039] Figure 1 This is a schematic diagram of the overall structure of the thrombus aspiration system provided in Example 1 of the present invention;

[0040] Figure 2 for Figure 1 A cross-sectional schematic diagram of a thrombus aspiration system is shown;

[0041] Figure 3 for Figure 1 A cross-sectional schematic diagram of a negative pressure generating device of a thrombus aspiration system is shown;

[0042] Figure 4 for Figure 1 A cross-sectional schematic diagram of a thrombus collection component of a thrombus aspiration system is shown;

[0043] Figure 5 This is a flow chart of the suction negative pressure control method provided in the second embodiment of the present invention;

[0044] Figure 6 A schematic structural diagram of a suction negative pressure control device provided in Example 3 of the present invention;

[0045] Figure 7 This is a schematic structural diagram of the control circuit board of the thrombus aspiration system provided in Example 4 of the present invention. DETAILED DESCRIPTION

[0046] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more apparent, various embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will appreciate that many technical details are provided in various embodiments of the present invention to help readers better understand the present invention. However, even without these technical details and various variations and modifications based on the following embodiments, the technical solutions claimed in the present invention can still be implemented.

[0047] In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0048] It should be noted that, unless otherwise expressly specified, the terms "connected", "connection", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements.

[0049] In describing the present invention, it is important to note that, in the field of interventional medical devices, the proximal end refers to the end closer to the operator, while the distal end refers to the end farther from the operator. Axial direction refers to the direction parallel to the line connecting the distal and proximal centers of the medical device in its natural state. The above definitions are for convenience only and are not to be construed as limitations of the present invention.

[0050] Example 1

[0051] See also Figure 1 、 Figure 2 As shown, an embodiment of the present invention provides a thrombus aspiration system that can be used in conjunction with an aspiration catheter to aspirate thrombi, thereby relieving blood vessel blockage. The thrombus aspiration system of this embodiment mainly includes: a negative pressure generating device 1 and a thrombus collection component 2.

[0052] The negative pressure generating device 1 serves as a negative pressure source, providing negative pressure for thrombus aspiration. The thrombus collection assembly 2 is used to collect the aspirated thrombus and blood. The negative pressure generating device 1 includes a housing 15, a negative pressure pump 11, and a negative pressure control assembly. The negative pressure pump 11 and the negative pressure control assembly are disposed within the housing 15. The negative pressure pump 11 is connected to the thrombus collection assembly 2 via a pipeline. The negative pressure control assembly is connected to the pipeline and is used to control the negative pressure of the thrombus aspiration system by switching the pipeline on and off. After the negative pressure pump 11 is turned on, in the initial state, the negative pressure control component will shut off the pipeline. At this time, the negative pressure on the output side of the negative pressure pump 11 can continue to increase. When the negative pressure on the output side of the negative pressure pump 11 increases to the preset opening threshold, the negative pressure control component can automatically control the pipeline to open. The pipeline has a large suction negative pressure at the moment of opening, which can meet the suction of thrombus with high suction force requirements. When the negative pressure in the pipeline is less than the preset shut-off threshold, the negative pressure control component can automatically shut off the pipeline to increase the negative pressure on the output side of the negative pressure pump 11 again. Such a cycle can realize the pulsed suction mode to achieve high suction force negative pressure suction. In addition, the suction negative pressure size can also be flexibly set through the negative pressure control component, so that the suction negative pressure size is more matched with the suction force required for the thrombus, achieving a good suction effect while helping to reduce bleeding volume and effectively reduce the risk of complications.

[0053] like Figure 2 and Figure 3 As shown, the pipeline may include: a first pipe segment 17a, a second pipe segment 17b, a third pipe segment 17c, and a fourth pipe segment 17d, which are sequentially connected between the thrombus collection assembly 2 and the negative pressure pump 11. The first, second, and third pipe segments 17a, 17b, and 17c form a straight tubular pipeline and are arranged parallel to the bottom surface of the housing 15. This straight tubular pipeline effectively shortens the pipeline length. The fourth pipe segment 17d may have an elbow to connect the straight tubular segments to the negative pressure pump 11. The pipeline may also include a catheter connector 16, one end of which is connected to the outer end of the first pipe segment 17a and the other end of which is connected to the thrombus collection assembly 2. Optionally, the catheter connector 16 and the thrombus collection assembly 2 are detachably connected, thereby facilitating replacement of the thrombus collection assembly of the thrombus aspiration system. This embodiment does not impose any specific limitations on the structure of the pipeline. For example, the individual pipe segments may also be curved or have other shapes, as long as they can achieve a sealed connection between the negative pressure pump and the thrombus aspiration assembly.

[0054] like Figure 2 and Figure 4 As shown, the thrombus collection assembly 2 may include: a sealed container 21, a first conduit 28, a second conduit 27, and a thrombus filter 22. The first conduit 28 and the second conduit 27 are respectively connected to the sealed container 21, and the second conduit 27 is also connected to the negative pressure generating device 1 to form a negative pressure suction path connecting the negative pressure generating device 1 and the first conduit 28. The second conduit 27 is detachably connected to the conduit connector 16.

[0055] The top cover of the sealed tank body 21 may also be provided with a first catheter connector 23 and a second catheter connector 24. Both the first and second catheter connectors 23 and 24 communicate with the inner cavity of the sealed tank body 21. The outer end of the first catheter connector 23 is connected to the first catheter 28, while the outer end of the second catheter connector 24 is connected to the second catheter 27. The other end of the second catheter 27 is connected to the negative pressure generating device 1. The thrombus filter 22 is located below the first and second catheter connectors 23 and 24.

[0056] The thrombus filter 22 divides the sealed tank body 21 into two upper and lower chambers. The thrombus filter 22 has micropores 221 that intercept and filter thrombi, ensuring that aspirated thrombi are located in the upper chamber of the sealed tank body 21, while filtered blood is collected in the lower chamber of the sealed tank body 21. The diameter of the micropores 221 can range from 0.2 to 1.5 mm, effectively separating the aspirated blood from the thrombi.

[0057] In some examples, the thrombus collection assembly 2 may further include a thrombus removal catheter connector 29 connected to the outer end of the first catheter 28. The thrombus removal catheter connector 29 is used to be connected to a suction catheter to achieve thrombus aspiration.

[0058] It is worth noting that the thrombus collection assembly 2 may also include a diaphragm 25 disposed at the inner end of the second catheter connector 24. Optionally, the diaphragm 25 may be secured to the second catheter connector 24 via a snap assembly 26. The diaphragm 25 can block moisture, bacteria, and other substances, preventing them from entering the negative pressure pump 11 and damaging components. Materials for the diaphragm 25 include, but are not limited to, thermoplastic polyurethane rubber, polyethylene, polyvinyl alcohol, polytetrafluoroethylene, and the like.

[0059] The negative pressure control assembly includes a control circuit board 12, a flow control valve 13, and an air pressure sensor assembly. The flow control valve 13 and the air pressure sensor assembly are each installed on a pipeline and connected to the control circuit board 12. The air pressure sensor assembly is used to detect the negative pressure of the thrombus aspiration system and transmit it to the control circuit board 12. The control circuit board controls the flow control valve 13 to open or close the pipeline based on the negative pressure information, thereby controlling the negative pressure of the thrombus aspiration system.

[0060] By way of example and not limitation, the air pressure sensing assembly may include: a first air pressure sensor 14a and a second air pressure sensor 14b. The first air pressure sensor 14a and the second air pressure sensor 14b may be respectively disposed on the pipeline at both ends of the flow control valve 13, and are respectively used to sense air pressure information on both sides of the flow control valve 13 in the pipeline. For example, the first air pressure sensor 14a is used to sense air pressure information between the flow control valve 13 and the thrombus collection assembly, while the second air pressure sensor 14b is used to sense air pressure information between the negative pressure pump 11 and the flow control valve 13. Specifically, the first air pressure sensor 14 can be disposed between the first pipe segment 17a and the second pipe segment 17b, the flow control valve 13 can be disposed between the second pipe segment 17b and the third pipe segment 17c, and the second air pressure sensor 14b can be disposed between the third pipe segment 17c and the fourth pipe segment 17d. Thus, the first air pressure sensor 14a can sense the air pressure between the flow control valve 13 and the thrombus collection assembly 2, while the second air pressure sensor 14b can sense the air pressure between the negative pressure pump 11 and the flow control valve 13. Thus, the first air pressure sensor 14a and the second air pressure sensor 14b can detect the air pressure difference between the two sides of the flow control valve 13 in the pipeline, and this air pressure difference is equivalent to the suction negative pressure of the thrombus aspiration system.

[0061] It should be noted that the negative pressure pump 11, as a negative pressure generating device, can adopt any negative pressure generating product that can meet the design requirements. The type of negative pressure pump can be a piston pump, a pneumatic diaphragm pump, a double-acting reciprocating pump, a water ring vacuum pump, a Roots vacuum pump, etc., and no specific restrictions are made here. The first air pressure sensor 14a and the second air pressure sensor 14b can adopt any air pressure sensor device that can meet the air pressure detection accuracy requirements, and no specific restrictions are made here. The control circuit board 12 may include a microcontroller unit, an analog-to-digital converter, etc. The analog-to-digital converter is used to convert the air pressure signals provided by the first air pressure sensor 14a and the second air pressure sensor 14b into digital signals, and the microcontroller unit is used to calculate the real-time suction negative pressure value based on the air pressure signals provided by the two. It can be understood that this embodiment does not impose specific restrictions on the structure of the control circuit board 12. The flow control valve 13 can adopt any valve structure that meets the design requirements, and no specific restrictions are made here.

[0062] It should be noted that the negative pressure control component may also include a gear knob 19 and a switch button 18 arranged on the outside of the shell 15. The gear knob 19 and the switch button 18 are both connected to the control circuit board 12. The switch button 18 is used to control the start and stop of the negative pressure suction device. The gear knob 19 is used to set the suction negative pressure of the thrombus suction system, and different gears correspond to different suction forces. For example, the gear knob 19 can provide 5 suction negative pressure gears, each suction negative pressure gear has a suction negative pressure value range, and the maximum suction negative pressure in the suction negative pressure value range corresponds to an opening pressure difference value of the flow control valve 13, and the minimum suction negative pressure corresponds to a closing pressure difference value of the flow control valve 13. This embodiment does not impose specific restrictions on the number of gears and the suction negative pressure size of each gear. The suction force size gear can be set to 5 gears, where each increase of 20kPa in the air pressure difference is one gear. The opening pressure differences of the flow control valve 13 corresponding to the 1st to 5th gears may be 20kPa, 40kPa, 60kPa, 80kPa and 100kPa respectively.

[0063] The method for controlling the negative suction pressure of the thrombus aspiration system according to an embodiment of the present invention is as follows:

[0064] (1) Adjust the gear knob 19 to the desired gear, turn on the switch button 18, and the thrombus aspiration system starts to operate. At this time, the flow control valve 13 is closed and the negative pressure pump 11 starts to work;

[0065] (2) The first air pressure sensor 14a and the second air pressure sensor 14b measure the air pressure at both ends of the flow control valve 13 in real time, and feed the detected air pressure information back to the control circuit board 12. The control circuit board 12 calculates the air pressure difference at both ends of the flow control valve 13;

[0066] (3) When the air pressure value of the second air pressure sensor 14b is less than the air pressure value of the first air pressure sensor 14a, and the difference between the two is the opening air pressure difference of the corresponding gear, for example, 80kPa, the control circuit board 12 sends an opening control signal to the flow control valve 13, so that the flow control valve 13 is opened, and the gas in the pipes on both sides of the flow control valve 13 flows instantly and rapidly, causing the suction end of the suction tube to generate a large suction force; when the air pressure values ​​measured by the first air pressure sensor 14a and the second air pressure sensor 14b are equal (that is, the air pressure difference between the first air pressure sensor 14a and the second air pressure sensor 14b is 0, and the air pressure difference is the shut-off threshold of the flow control valve 13), the control circuit board 12 sends a closing signal to close the flow control valve 13; it can be understood that the shut-off threshold of the flow control valve 13 can also be greater than 0, and this embodiment does not impose a specific restriction on its value. When the shut-off threshold of the flow control valve 13 is greater than 0, the speed of shutting off the flow control valve 13 is accelerated.

[0067] (4) The control circuit board 12 continuously controls the flow control valve 13 to repeat the opening and closing actions of step (3) until the operator turns off the switch button 18 to stop the system operation.

[0068] It is understood that the air pressure sensing assembly can also be a single air pressure sensor, located in the pipeline between the vacuum pump 11 and the flow control valve 13. In this case, the negative suction pressure approximates the difference between the air pressure at the output of the vacuum pump 11 and the air pressure within the blood vessel. The control board 12 can also control the thrombus aspiration system to provide varying levels of negative suction pressure based on the air pressure information provided by this single air pressure sensor.

[0069] Combine Figure 2 As shown, the steps for using the thrombus aspiration system according to the embodiment of the present invention are as follows:

[0070] 1. Connect the second catheter 27 to the catheter connector 16 of the negative pressure generating device 1 and the second catheter connector 24 of the sealed tank 21, respectively. Connect the thrombus removal catheter connector 29 to the suction catheter.

[0071] 2. Adjust the gear knob 19 to the desired gear;

[0072] 3. Turn on the switch button 18 and the thrombus aspiration system starts to operate;

[0073] 4. The control panel 12 controls the flow control valve 13 to repeatedly open and close. The instantaneous suction force when the flow control valve (13) is opened is the largest.

[0074] 5. After the aspiration is completed, turn off the switch button 18, pull out the second catheter 27 from the catheter connector 16, and replace it with a new thrombus collection assembly for next use.

[0075] Based on the above technical solution, the present invention has at least the following advantages and positive effects:

[0076] The thrombus aspiration system of the embodiment of the present invention controls the suction negative pressure of the thrombus aspiration system by controlling the on-off state of the pipeline between the negative pressure pump and the thrombus collection component, so that the suction negative pressure can be flexibly adjusted during the aspiration process to meet the aspiration force requirements of different thrombi, improve the aspiration effect, and especially improve the success rate of aspiration of thrombi that require a large aspiration force. At the same time, it is beneficial to reduce the amount of bleeding during the aspiration process, reduce the risk of complications, and improve the treatment effect.

[0077] Example 2

[0078] like Figure 5 As shown, the embodiment of the present invention also provides a method for controlling suction negative pressure. This method can be applied to the thrombus suction system described in Example 1. Figure 5 As shown, the suction negative pressure control method of this embodiment includes steps 501 to 503.

[0079] Step 501: Acquire the suction negative pressure information of the thrombus suction system in real time after the negative pressure pump is turned on.

[0080] Step 502: Obtain the negative suction pressure of the thrombus aspiration system based on the negative suction pressure information. The negative suction pressure is the pressure difference between the negative pressure pump and the thrombus aspiration component. Specifically, it can be the absolute value of the pressure difference between the first and second pressure sensors of the thrombus aspiration system.

[0081] Step 503: If the absolute value of the negative suction pressure of the thrombus aspiration system is greater than or equal to a preset opening threshold, the aspiration line of the thrombus aspiration system is opened; if the absolute value of the negative suction pressure is less than a preset closing threshold, the aspiration line is closed. The preset opening threshold is greater than the preset closing threshold.

[0082] The preset opening threshold can be the opening pressure difference corresponding to the selected gear. The preset closing threshold can be 0, that is, the pressure at both ends of the flow control valve is the same. Of course, the preset closing threshold can also be set as needed, for example, to 5kPa.

[0083] The control panel of the thrombus aspiration system continuously controls the on and off of the flow control valve to achieve pulsed high-suction aspiration.

[0084] The suction negative pressure control method of the embodiment of the present invention controls the suction negative pressure of the thrombus suction system by controlling the on and off of the flow control valve, so that the suction negative pressure can be flexibly adjusted during the suction process to meet the suction force requirements of different thrombi, improve the suction effect, and especially improve the success rate of aspiration of thrombi that require a large suction force. At the same time, it is beneficial to reduce the amount of bleeding during the suction process, reduce the risk of complications, and improve the treatment effect.

[0085] Example 3

[0086] like Figure 6 As shown, the embodiment of the present invention further provides a suction negative pressure control device. The device can be configured on the control circuit board of the thrombus suction system as described in Example 1. Figure 6 As shown, the suction negative pressure control device 600 includes: an acquisition module 602 , a calculation module 604 and a control module 606 .

[0087] The acquisition module 602 is used to acquire the suction negative pressure information of the thrombus suction system in real time after the negative pressure pump is turned on.

[0088] The calculation module 604 is used to obtain the suction negative pressure of the thrombus suction system according to the suction negative pressure information; the suction negative pressure is the air pressure difference between the negative pressure pump and the thrombus suction component.

[0089] The control module 606 is used to open the aspiration pipeline of the thrombus aspiration system if the absolute value of the aspiration negative pressure of the thrombus aspiration system is greater than or equal to a preset opening threshold, and to close the aspiration pipeline if the absolute value of the aspiration negative pressure is less than or equal to a preset closing threshold; the preset opening threshold is greater than the preset closing threshold.

[0090] The suction negative pressure control device of the embodiment of the present invention controls the suction negative pressure of the thrombus suction system by controlling the on and off of the flow control valve, so that the suction negative pressure can be flexibly adjusted during the suction process to meet the suction force requirements of different thrombi, improve the suction effect, and especially improve the success rate of aspiration of thrombi that require a large suction force. At the same time, it is beneficial to reduce the amount of bleeding during the suction process, reduce the risk of complications, and improve the treatment effect.

[0091] Example 4

[0092] Figure 7 This is a schematic diagram of the structure of a control circuit board provided in Embodiment 4 of the present invention. The control circuit board 70 includes a memory 71, a processor 72, and a computer program stored in the memory 71 and executable on the processor 72. When the processor 72 executes the program, the technical solution described in Embodiment 1 above is implemented.

[0093] Example 5

[0094] A fifth embodiment of the present invention provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a computer processor, the computer program is used to execute the technical solution of any embodiment.

[0095] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present invention, and that in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A thrombus aspiration system, characterized in that: include: Negative pressure generating device and thrombus collection assembly; The negative pressure generating device includes: a housing, a negative pressure pump, and a negative pressure control component; the negative pressure pump and the negative pressure control component are arranged in the housing; The negative pressure pump is connected to the thrombus collection component through a pipeline; The negative pressure control component 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; The negative pressure control component includes: a control circuit board, a flow control valve and an air pressure sensor component; The flow control valve and the air pressure sensing assembly are respectively arranged on the pipeline and are respectively connected to the control circuit board; the air pressure sensing assembly is used to detect the suction negative pressure information of the thrombus aspiration system and provide it to the control circuit board, and the control circuit board is used to control the flow control valve to open or close the pipeline according to the suction negative pressure information, so as to control the magnitude of the suction negative pressure of the thrombus aspiration system; The air pressure sensing assembly includes: a first air pressure sensor and a second air pressure sensor; the first air pressure sensor and the second air pressure sensor are respectively arranged on the pipeline and located at both ends of the flow control valve, and are respectively used to sense the air pressure information on both sides of the flow control valve in the pipeline; The pipeline includes: a first pipe section, a second pipe section, a third pipe section and a fourth pipe section which are sequentially connected between the thrombus collection component and the negative pressure pump; The first air pressure sensor is arranged between the first pipe section and the second pipe section, the flow control valve is arranged between the second pipe section and the third pipe section, and the second air pressure sensor is arranged between the third pipe section and the fourth pipe section; The control circuit board is equipped with a suction negative pressure control device, which includes: an acquisition module, configured to acquire in real time the suction negative pressure information of the thrombus suction system after the negative pressure pump is turned on; a calculation module, configured to obtain the suction negative pressure of the thrombus suction system according to the suction negative pressure information; the suction negative pressure is the pressure difference between the negative pressure pump and the thrombus suction component; A control module is configured to open the aspiration circuit of the thrombus aspiration system if the absolute value of the negative aspiration pressure of the thrombus aspiration system is greater than or equal to a preset opening threshold, and to close the aspiration circuit if the absolute value of the negative aspiration pressure is less than or equal to a preset closing threshold; the preset opening threshold is greater than the preset closing threshold.

2. The thrombus aspiration system according to claim 1, characterized in that: The first pipe section, the second pipe section and the third pipe section form a straight pipe line and are arranged parallel to the bottom surface of the shell.

3. The thrombus aspiration system according to claim 2, characterized in that: The pipeline further includes a catheter connector with one end connected to the outer end of the first pipe segment, and the other end of the catheter connector is connected to the thrombus collection component.

4. The thrombus aspiration system according to claim 3, characterized in that: The catheter connector and the thrombus collection component are detachably connected.

5. The thrombus aspiration system according to claim 1, characterized in that: The negative pressure control component further includes a gear knob disposed on the outside of the housing; the gear knob is connected to the control circuit board and is used to set the suction negative pressure of the thrombus suction system.

6. The thrombus aspiration system according to claim 1, characterized in that: The thrombus collection assembly includes: a sealed tank body, a first catheter and a second catheter; The first conduit and the second conduit are respectively connected to the sealed tank body, and the second conduit is also connected to the negative pressure generating device to form a negative pressure suction air path connecting the negative pressure generating device and the first conduit.

7. The thrombus aspiration system according to claim 6, characterized in that: A thrombus filter is provided in the sealed tank body.

8. The thrombus aspiration system according to claim 7, characterized in that: The top cover of the sealed tank body is provided with a first conduit joint and a second conduit joint; the first conduit joint and the second conduit joint are both communicated with the inner cavity of the sealed tank body; The outer end of the first catheter connector is connected to the first catheter, the outer end of the second catheter connector is connected to the second catheter, and the other end of the second catheter is connected to the negative pressure generating device; The thrombus filter is located below the first catheter connector and the second catheter connector.

9. The thrombus aspiration system according to claim 8, characterized in that: The thrombus collection assembly also includes a thrombus removal catheter connector connected to the outer end of the first catheter.

10. The thrombus aspiration system according to claim 9, characterized in that: The thrombus collection assembly further includes a septum disposed at the inner end of the second catheter connector.

11. The thrombus aspiration system according to claim 10, characterized in that: The diaphragm is fixed to the second catheter connector via a snap assembly.

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