CN115644988A - Thrombus aspiration system, aspiration negative pressure control method and device - Google Patents
Thrombus aspiration system, aspiration negative pressure control method and device Download PDFInfo
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- CN115644988A CN115644988A CN202211372787.5A CN202211372787A CN115644988A CN 115644988 A CN115644988 A CN 115644988A CN 202211372787 A CN202211372787 A CN 202211372787A CN 115644988 A CN115644988 A CN 115644988A
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Abstract
The invention provides a thrombus aspiration system, an aspiration negative pressure control method and an aspiration negative pressure control device. The system comprises a negative pressure generating device and a thrombus collection assembly; the negative pressure generating device includes: the device comprises a shell, a negative pressure pump and a negative pressure control assembly; the negative pressure pump and the negative pressure control assembly are arranged in the shell; the negative pressure pump is connected with the thrombus collecting assembly through a pipeline; the negative pressure control assembly is connected with the pipeline and is used for controlling the suction negative pressure of the thrombus suction system by controlling the on-off of the pipeline. The embodiment of the invention can flexibly adjust the suction force, meet the requirements of different thrombi on the suction force, improve the suction effect and simultaneously facilitate the reduction of blood loss.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a thrombus aspiration system, and an aspiration negative pressure control method and device.
Background
Thrombotic diseases seriously threaten human life health, the incidence rate of the thrombotic diseases is the first of various diseases, and the thrombotic diseases are increasing in recent years, and are one of the key points and hot points of modern medical research. Thrombosis refers to the process by which blood flowing within a blood or heart chamber becomes a solid clot, called a thrombus or embolus. Thrombi can occur in blood vessels at any part of the body, thereby blocking the blood vessel cavity, causing blood flow to stop or stagnate, causing thrombotic diseases, and having high disability rate and lethality rate. Myocardial infarction, cerebral infarction, pulmonary embolism, atrial fibrillation, lower limb venous embolism, amniotic fluid embolism and other diseases, and the diseases are all thrombotic diseases.
One of the methods for treating thrombi is to suck out the thrombi through an aspiration catheter by using the principle of negative pressure aspiration. The mechanical suction device in the prior art is used for continuous suction, has constant negative pressure and small suction force, and is not easy to suck thrombus with larger volume or larger adhesion force. If the physician does not place the active end of the aspiration catheter close to the thrombus site while continuing aspiration, this may result in excess blood being aspirated, increasing the risk of complications. Meanwhile, when thrombus with different suction forming time is sucked, the required suction force is different, and the constant-pressure suction effect is not good enough.
It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present application and therefore may include information that does not constitute prior art known to a person of ordinary skill in the art.
Disclosure of Invention
The embodiment of the invention aims to provide a thrombus aspiration system, an aspiration negative pressure control method and an aspiration negative pressure control device, which can flexibly adjust the aspiration force, meet the requirements of different thrombi on the magnitude of the aspiration force, improve the aspiration effect and simultaneously facilitate the reduction of blood loss.
In a first aspect, embodiments of the present invention provide a thrombus aspiration system, including: a negative pressure generating device and a thrombus collection assembly;
the negative pressure generating device includes: the device comprises a shell, a negative pressure pump and a negative pressure control assembly; the negative pressure pump and the negative pressure control assembly are arranged in the shell;
the negative pressure pump is connected with the thrombus collecting assembly through a pipeline;
the negative pressure control assembly is connected with the pipeline and is used for controlling the suction negative pressure of the thrombus suction system by controlling the on-off of the pipeline.
In addition, the negative pressure control assembly includes: the device comprises a control circuit board, a flow control valve and an air pressure sensing assembly;
the flow control valve and the air pressure sensing assembly are respectively arranged on the pipeline and are respectively connected with the control circuit board; the air pressure sensing assembly is used for detecting suction negative pressure information of the thrombus suction system and providing the suction negative pressure information to the control circuit board, and the control circuit board is used for controlling the flow control valve to open or close the pipeline according to the suction negative pressure information so as to control the suction negative pressure of the thrombus suction system.
Additionally, 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 positioned at two ends of the flow control valve, and are respectively used for sensing air pressure information at two sides of the flow control valve in the pipeline.
In addition, the piping includes: a first tube section, a second tube section, a third tube section and a fourth tube section which are sequentially connected between the thrombus collection assembly 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.
In addition, the first pipe section, the second pipe section and the third pipe section form a straight pipe-shaped pipeline; and is arranged in parallel with the bottom surface of the shell.
In addition, the pipeline also comprises a catheter joint, one end of the catheter joint is connected with the outer end of the first pipe section, and the other end of the catheter joint is connected with the thrombus collection assembly;
optionally, the catheter adapter and the thrombus collection assembly are removably attached.
In addition, the negative pressure control assembly further comprises a gear knob arranged on the outer side of the shell; the gear knob is connected with the control circuit board and is used for setting the suction negative pressure of the thrombus suction system.
Additionally, the thrombus collection assembly comprises: the device comprises a sealed tank body, a first conduit and a second conduit;
the first conduit and the second conduit are respectively connected with the sealed tank body, and the second conduit is also connected with the negative pressure generating device to form a negative pressure suction air path communicated with the negative pressure generating device and the first conduit;
optionally, a thrombus screen is arranged in the sealing tank body.
In addition, a first conduit joint and a second conduit joint are arranged on the top cover of the sealed tank body; the first conduit connector and the second conduit connector are both communicated with the inner cavity of the sealed tank body;
the outer end of the first conduit joint is connected with the first conduit, the outer end of the second conduit joint is connected with the second conduit, and the other end of the second conduit is connected with the negative pressure generating device;
the thrombus screen is positioned below the first and second catheter connectors;
optionally, the thrombus collection assembly further comprises a thrombectomy catheter adapter coupled to the outer end of the first catheter.
Additionally, the thrombus collection assembly further comprises a septum disposed at an inner end of the second catheter hub;
optionally, the diaphragm is secured to the second conduit joint by a snap assembly.
In a second aspect, an embodiment of the present invention provides an aspiration negative pressure control method, which is applied to the thrombus aspiration system according to the first aspect, and the method includes:
acquiring suction negative pressure information of the thrombus suction system after the negative pressure pump is started in real time;
obtaining 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 value between the negative pressure pump and the thrombus suction assembly;
if the absolute value of the suction negative pressure of the thrombus suction system is greater than or equal to a preset opening threshold value, opening a suction pipeline of the thrombus suction system, and if the absolute value of the suction negative pressure is less than or equal to a preset closing threshold value, closing the suction pipeline; the preset turn-on threshold is greater than the preset turn-off threshold.
In a third aspect, an embodiment of the present invention provides an aspiration negative pressure control device configured in the thrombus aspiration system according to the first aspect, the device including:
the acquisition module is used for acquiring suction negative pressure information of the thrombus suction system after the negative pressure pump is started in real time;
the calculation module is used for obtaining 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 value between the negative pressure pump and the thrombus suction assembly;
the control module is used for switching on a suction pipeline of the thrombus suction system if the absolute value of the suction negative pressure of the thrombus suction system is greater than or equal to a preset switching-on threshold value, and switching off the suction pipeline if the absolute value of the suction negative pressure is less than or equal to a preset switching-off threshold value; the preset on threshold is greater than the preset off threshold.
According to the technical scheme, the embodiment of the invention at least has the following advantages and positive effects:
in the thrombus aspiration system provided by the embodiment of the invention, the negative pressure pump is connected with the thrombus collection assembly through the pipeline, the negative pressure control assembly is connected with the pipeline and is used for controlling the aspiration negative pressure of the thrombus aspiration system through controlling the on-off of the pipeline, and the aspiration negative pressure of the thrombus aspiration system is controlled, so that the aspiration negative pressure can be flexibly adjusted in the aspiration process, the requirements of different thrombi on the aspiration force are met, the aspiration effect is improved, particularly the aspiration success rate of the thrombi requiring large aspiration force can be improved, the bleeding amount in the aspiration process is reduced, the complication risk is reduced, and the treatment effect is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, it is understood that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic view of the overall structure of a thrombus aspiration system provided in one embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of the thrombus aspiration system shown in FIG. 1;
FIG. 3 is a schematic sectional view of the negative pressure generating device of the thrombus aspiration system shown in FIG. 1;
FIG. 4 is a schematic cross-sectional view of a thrombus collection assembly of the thrombus aspiration system shown in FIG. 1;
FIG. 5 is a flowchart illustrating a method for controlling a suction negative pressure according to a second embodiment of the present invention;
fig. 6 is a schematic structural diagram of a suction negative pressure control device according to a third embodiment of the present invention;
fig. 7 is a schematic structural diagram of a control circuit board of a thrombus aspiration system according to a fourth embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that numerous technical details are set forth in order to provide a better understanding of the present invention in its various embodiments. However, the technical solution claimed in the present invention can be implemented without these technical details and various changes and modifications based on the following embodiments.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
It should be noted that, unless expressly stated otherwise, the terms "connected," "connected," and the like are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements.
In the description of the present invention, it should be noted that, in the field of interventional medical devices, the proximal end refers to the end closer to the operator, and the distal end refers to the end farther from the operator; axial refers to a direction parallel to the line connecting the center of the distal end and the center of the proximal end of the medical device in its natural state. The foregoing definitions are for convenience only and are not to be construed as limiting the present invention.
Example one
Referring to fig. 1 and 2, an embodiment of the present invention provides a thrombus aspiration system, which can cooperate with an aspiration catheter to aspirate thrombus, thereby removing blood vessel occlusion. The thrombus aspiration system of the present embodiment mainly includes: a negative pressure generating device 1 and a thrombus collection assembly 2.
The negative pressure generating apparatus 1 serves as a negative pressure source for providing negative pressure for thrombus aspiration. The thrombus collection assembly 2 is used to collect aspirated thrombus and blood. The negative pressure generating apparatus 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 in the housing 15. The negative pressure pump 11 is connected with the thrombus collection assembly 2 through a pipeline. The negative pressure control assembly is connected with the pipeline and is used for controlling the suction negative pressure of the thrombus suction system by controlling the on-off of the pipeline. After the negative pressure pump 11 is started, the negative pressure control assembly turns off the pipeline in an initial state, negative pressure on the output side of the negative pressure pump 11 can be continuously increased at the moment, when the negative pressure on the output side of the negative pressure pump 11 is increased to a preset opening threshold value, the negative pressure control assembly can automatically control the pipeline to be opened, and the pipeline has very large suction negative pressure at the moment of opening, so that thrombus with high suction force requirement can be sucked, when the negative pressure in the pipeline is smaller than the preset opening threshold value, the negative pressure control assembly can automatically turn off the pipeline to increase the negative pressure on the output side of the negative pressure pump 11 again, and the pulse type suction mode can be realized by circulating the above steps, so that high-suction negative pressure suction is realized. In addition, still can set up the suction negative pressure size in a flexible way through negative pressure control assembly to make suction negative pressure size and the required suction force of thrombus more match, be favorable to reducing the amount of bleeding when reaching good suction effect, effectively reduce complication and take place the risk.
As shown in fig. 2 and 3, the piping may include: a first tube section 17a, a second tube section 17b, a third tube section 17c and a fourth tube section 17d connected in sequence between the thrombus collection assembly 2 and the negative pressure pump 11. The first pipe section 17a, the second pipe section 17b and the third pipe section 17c form a straight pipe-shaped pipeline, and the straight pipe-shaped pipeline is arranged in parallel with the bottom surface of the shell 15, and the straight pipe-shaped pipeline can effectively shorten the length of the pipeline. The fourth pipe section 17d may have an elbow, connecting the straight pipe section and the negative pressure pump 11. The tubing set may further include a catheter adapter 16 connected at one end to the outer end of the first tube segment 17a, the catheter adapter 16 being connected at the other end to the thrombus collection assembly 2. Optionally, the catheter adapter 16 and the thrombus collection assembly 2 are removably attached so that the thrombus collection assembly of the thrombus aspiration system can be easily replaced. The structure of the pipeline is not particularly limited in this embodiment, for example, each pipeline segment may also be an elbow or other shaped pipeline as long as a sealed connection path between the negative pressure pump and the thrombus aspiration assembly can be realized.
As shown in fig. 2 and 4, the thrombus collection assembly 2 may include: a sealing tank 21, a first conduit 28, a second conduit 27 and a thrombus screen 22. The first conduit 28 and the second conduit 27 are connected to the sealed tank 21, respectively, and the second conduit 27 is also connected to the negative pressure generating device 1 to form a negative pressure suction air passage that communicates the negative pressure generating device 1 and the first conduit 28. Wherein the second conduit 27 is detachably connected to the conduit connection 16.
The top cover of the sealed tank 21 may further be provided with a first conduit connector 23 and a second conduit connector 24. The first conduit connector 23 and the second conduit connector 24 are both communicated with the inner cavity of the sealed tank body 21. The first conduit connector 23 is connected at its outer end to a first conduit 28, the second conduit connector 24 is connected at its outer end to a second conduit 27, and the second conduit 27 is connected at its other end to the negative pressure generating device 1. The thrombus screen 22 is positioned below the first catheter adapter 23 and the second catheter adapter 24.
The thrombus filter 22 divides the sealed tank body 21 into an upper chamber and a lower chamber. Thrombus filter screen 22 has micropore 221, and micropore 221 is used for intercepting filtering thrombus for the thrombus of suction out is located the top cavity of sealed jar body 21, and the below cavity of sealed jar body 21 is collected to the blood after the filtration. The diameter of the micro-hole 221 can be 0.2-1.5 mm, and the blood and the thrombus can be effectively separated.
In some instances, the thrombus collection assembly 2 may further include an embolectomy catheter adapter 29 coupled to the outer end of the first catheter 28, the embolectomy catheter adapter 29 being adapted to couple to an aspiration catheter to effect aspiration of thrombus.
It is worth mentioning that the thrombus collection assembly 2 may further comprise a septum 25 disposed at the inner end of the second catheter adapter 24. Alternatively, the septum 25 may be secured to the second catheter adapter 24 by a snap assembly 26. Moisture, bacteria and the like can be blocked by the diaphragm 25, and the moisture, bacteria and the like are prevented from entering the negative pressure pump 11 to damage components. The material of the diaphragm 25 includes, but is not limited to, thermoplastic polyurethane rubber, polyethylene, polyvinyl alcohol, polytetrafluoroethylene, and the like.
The negative pressure control assembly may include: a control circuit board 12, a flow control valve 13 and an air pressure sensing assembly. The flow control valve 13 and the air pressure sensing assembly are respectively arranged on the pipeline and are respectively connected with the control circuit board 12. The air pressure sensing assembly is used for detecting suction negative pressure information of the thrombus suction system and providing the suction negative pressure information to the control circuit board 12, and the control circuit board is used for controlling the flow control valve 13 to open or close the pipeline according to the suction negative pressure information so as to control the suction negative pressure of the thrombus suction system.
By way of example and not limitation, the air pressure sensing assembly may include: a first barometric pressure sensor 14a and a second barometric pressure sensor 14b. The first air pressure sensor 14a and the second air pressure sensor 14b may be respectively disposed on the pipeline and located at two ends of the flow control valve 13, and are respectively used for sensing air pressure information at two sides of the flow control valve 13 in the pipeline, for example, the first air pressure sensor 14a is used for sensing air pressure information between the flow control valve 13 and the thrombus collection assembly, and the second air pressure sensor 14b is used for sensing air pressure information between the negative pressure pump 11 and the flow control valve 13. Specifically, the first air pressure sensor 14 may be disposed between the first tube segment 17a and the second tube segment 17b, the flow control valve 13 may be disposed between the second tube segment 17b and the third tube segment 17c, and the second air pressure sensor 14b may be disposed between the third tube segment 17c and the fourth tube segment 17d, so that air pressure information between the flow control valve 13 and the thrombus collection assembly 2 may be sensed by the first air pressure sensor 14a, and air pressure information between the negative pressure pump 11 and the flow control valve 13 may be sensed by the second air pressure sensor 14b. Thus, the first air pressure sensor 14a and the second air pressure sensor 14b detect the air pressure difference value information on both sides of the in-line flow control valve 13, which is equivalent to the suction negative pressure of the thrombus suction system.
It should be noted that the negative pressure pump 11 may be any negative pressure generating device capable of meeting design requirements, and the type of the negative pressure pump may be a piston pump, a pneumatic diaphragm pump, a double-acting reciprocating pump, a water ring vacuum pump, a roots vacuum pump, etc., and is not limited herein. The first air pressure sensor 14a and the second air pressure sensor 14b may be any air pressure sensing device capable of meeting the requirement of air pressure detection accuracy, and are not particularly limited herein. The control circuit board 12 may include a micro control unit, an analog-to-digital converter, and the like. The analog-to-digital converter is used for converting air pressure signals provided by the first air pressure sensor 14a and the second air pressure sensor 14b into digital signals, and the micro control unit is used for calculating a real-time suction negative pressure value according to the air pressure signals provided by the first air pressure sensor and the second air pressure sensor. It is to be understood that the present embodiment is not particularly limited to the structure of the control circuit board 12. The flow control valve 13 may adopt any valve structure that satisfies design requirements, and is not particularly limited herein.
It should be noted that the negative pressure control assembly may further include a shift knob 19 and a switch button 18 disposed outside the housing 15. The shift knob 19 and the switch knob 18 are connected to the control circuit board 12. The switch button 18 is used for controlling the on-off of the negative pressure suction device. The gear knob 19 is used for setting the suction negative pressure of the thrombus suction system, and different gears correspond to different suction forces. For example, the shift knob 19 can provide 5 pumping vacuum shifts, each of which has a pumping vacuum range, where the maximum pumping vacuum in the pumping vacuum range corresponds to an on-pressure difference value of the flow control valve 13 and the minimum pumping vacuum corresponds to an off-pressure difference value of the flow control valve 13. The number of gears and the size of the negative suction pressure of each gear are not particularly limited in this embodiment. The suction magnitude step may be set to 5 steps, in which one step is performed for each 20kPa increase in the air pressure difference. The opening air pressure difference values of the flow control valves 13 corresponding to 1 to 5 shift positions may be 20kPa, 40kPa, 60kPa, 80kPa, and 100kPa, respectively.
The control method of the suction negative pressure of the thrombus suction system provided by the embodiment of the invention comprises the following steps:
(1) The gear knob 19 is adjusted to a required gear, the switch button 18 is turned on, the thrombus pumping system starts to operate, the flow control valve 13 is in a closed state at the moment, and the negative pressure pump 11 starts to work;
(2) The first air pressure sensor 14a and the second air pressure sensor 14b measure the air pressure at the two ends of the flow control valve 13 in real time, the detected air pressure information is fed back to the control circuit board 12, and the control circuit board 12 calculates to obtain the air pressure difference value at the two ends of the flow control valve 13;
(3) When the air pressure value of the second air pressure sensor 14b is smaller than the air pressure value of the first air pressure sensor 14a, and the difference value between the two is the opening air pressure difference value 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 air in the pipes on the two sides of the flow control valve 13 instantly and rapidly flows, so that the suction end of the suction catheter generates 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 value between the first air pressure sensor 14a and the second air pressure sensor 14b is 0, which is the turn-off threshold of the flow control valve 13), the control circuit board 12 sends a turn-off signal to turn off the flow control valve 13; it is understood that the shut-off threshold of the flow control valve 13 may also be greater than 0, and the value of the shut-off threshold is not particularly limited in this embodiment. When the shut-off threshold of the flow control valve 13 is larger than 0, the speed of shutting off the flow control valve 13 is increased.
(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.
It is understood that the air pressure sensing component can also be an air pressure sensor, which is arranged on the pipeline between the negative pressure pump 11 and the flow control valve 13. The suction negative pressure is now approximately the difference between the air pressure at the output of the negative pressure pump 11 and the air pressure in the blood vessel. The control board 12 can also control the thrombus aspiration system to provide aspiration negative pressures of different magnitudes based on the air pressure information provided by the one air pressure sensor.
Referring to fig. 2, the thrombus aspiration system according to the embodiment of the present invention is used in the following steps:
1. connecting the second conduit 27 to the conduit joint 16 of the negative pressure generating device 1 and the second conduit joint 24 of the sealed tank 21, respectively, and connecting the embolectomy conduit joint 29 to the suction conduit;
2. adjusting the gear knob 19 to a required gear;
3. the switch button 18 is turned on, and the thrombus aspiration system starts to operate;
4. the control board 12 controls the flow control valve 13 to repeatedly open and close, and the instantaneous suction force of the opening of the flow control valve (13) is maximum.
5. After aspiration is complete, the switch button 18 is closed, and the second catheter 27 is withdrawn from the catheter hub 16 and replaced with a new thrombus collection assembly for the next use.
Based on the technical scheme, the invention at least has the following advantages and positive effects:
the thrombus suction system disclosed by the embodiment of the invention controls the suction negative pressure of the thrombus suction system by controlling the on-off of the pipeline between the negative pressure pump and the thrombus collection assembly, so that the suction negative pressure can be flexibly adjusted in the suction process, the requirements of different thrombi on suction force are met, the suction effect is improved, the suction success rate of the thrombi requiring large suction force can be especially improved, and meanwhile, the thrombus suction system is favorable for reducing the bleeding amount in the suction process, reducing the risk of complication and improving the treatment effect.
Example two
As shown in fig. 5, the embodiment of the present invention further provides a suction negative pressure control method. The method can be applied to the thrombus aspiration system described in the first embodiment. As shown in fig. 5, the suction negative pressure control method of the present embodiment includes steps 501 to 503.
Step 501: and acquiring suction negative pressure information of the thrombus suction system after the negative pressure pump is started in real time.
Step 502: and obtaining 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 value between the negative pressure pump and the thrombus suction assembly. In particular, the absolute value of the air pressure difference value of the first air pressure sensor and the second air pressure sensor of the thrombus aspiration system can be realized.
Step 503: and if the absolute value of the suction negative pressure of the thrombus suction system is greater than or equal to the preset opening threshold, opening a suction pipeline of the thrombus suction system, and if the absolute value of the suction negative pressure is less than the preset closing threshold, closing the suction pipeline. The preset turn-on threshold is greater than the preset turn-off threshold.
The preset opening threshold value can be an opening air pressure difference value corresponding to the selected gear. The preset turn-off threshold may be 0, that is, the air pressure at both ends of the flow control valve is the same, and of course, the preset turn-off threshold may also be set as required, for example, set to 5kPa.
The control panel of the thrombus suction system continuously controls the on-off of the flow control valve to realize pulse type large suction.
The suction negative pressure control method controls the suction negative pressure of the thrombus suction system by controlling the on-off of the flow control valve, so that the suction negative pressure can be flexibly adjusted in the suction process, the requirements of different thrombi on suction force are met, the suction effect is improved, the suction success rate of the thrombi requiring large suction force can be especially improved, the bleeding amount in the suction process is reduced, the complication risk is reduced, and the treatment effect is improved.
EXAMPLE III
As shown in fig. 6, the embodiment of the present invention also provides a suction negative pressure control device. The device can be configured on the control circuit board of the thrombus aspiration system according to the first embodiment. As shown in fig. 6, the suction negative pressure control device 600 includes: an acquisition module 602, a calculation module 604, and a control module 606.
The obtaining module 602 is configured to obtain suction negative pressure information of the thrombus aspiration system after the negative pressure pump is turned on in real time.
The calculation module 604 is used for obtaining 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 value between the negative pressure pump and the thrombus suction assembly.
The control module 606 is configured to open the aspiration line 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 close the aspiration line if the absolute value of the aspiration negative pressure is less than or equal to a preset closing threshold; the preset turn-on threshold is greater than the preset turn-off threshold.
The suction negative pressure control device controls the suction negative pressure of the thrombus suction system by controlling the on-off of the flow control valve, so that the suction negative pressure can be flexibly adjusted in the suction process, the requirements of different thrombi on suction force are met, the suction effect is improved, the suction success rate of the thrombi requiring large suction force can be especially improved, the bleeding amount in the suction process is reduced, the risk of complications is reduced, and the treatment effect is improved.
Example four
Fig. 7 is a schematic structural diagram of a control circuit board according to a fourth embodiment 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, and the processor 72 implements the technical solution as described in the first embodiment when executing the program.
EXAMPLE five
Fifth embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program is used to execute the technical solutions of any one of the embodiments when executed by a computer processor.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.
Claims (10)
1. A thrombus aspiration system, comprising: a negative pressure generating device and a thrombus collecting assembly;
the negative pressure generating device includes: the device comprises a shell, a negative pressure pump and a negative pressure control assembly; the negative pressure pump and the negative pressure control assembly are arranged in the shell;
the negative pressure pump is connected with the thrombus collecting assembly through a pipeline;
the negative pressure control assembly is connected with the pipeline and is used for controlling the suction negative pressure of the thrombus suction system by controlling the on-off of the pipeline.
2. The thrombus aspiration system of claim 1, wherein the negative pressure control assembly comprises: the device comprises a control circuit board, a flow control valve and an air pressure sensing assembly;
the flow control valve and the air pressure sensing assembly are respectively arranged on the pipeline and are respectively connected with the control circuit board; the air pressure sensing assembly is used for detecting suction negative pressure information of the thrombus suction system and providing the suction negative pressure information to the control circuit board, and the control circuit board is used for controlling the flow control valve to open or close the pipeline according to the suction negative pressure information so as to control the suction negative pressure of the thrombus suction system.
3. A thrombus aspiration system according to claim 2, wherein the air pressure sensing assembly comprises: 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 positioned at two ends of the flow control valve and are respectively used for sensing air pressure information at two sides of the flow control valve in the pipeline.
4. A thrombus aspiration system according to claim 3, wherein the conduit comprises: a first tube section, a second tube section, a third tube section and a fourth tube section which are sequentially connected between the thrombus collection assembly 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;
optionally, the first, second and third pipe sections form a straight tubular pipeline; and is arranged in parallel with the bottom surface of the shell;
optionally, the pipeline further comprises a catheter joint, one end of the catheter joint is connected with the outer end of the first pipe section, and the other end of the catheter joint is connected with the thrombus collection assembly;
optionally, the catheter adapter and the thrombus collection assembly are removably connected.
5. The thrombus aspiration system of claim 2, wherein the negative pressure control assembly further comprises a shift knob disposed outside the housing; the gear knob is connected with the control circuit board and is used for setting the suction negative pressure of the thrombus suction system.
6. A thrombus aspiration system according to claim 1, wherein the thrombus collection assembly comprises: the device comprises a sealed tank body, a first conduit and a second conduit;
the first conduit and the second conduit are respectively connected with the sealed tank body, and the second conduit is also connected with the negative pressure generating device to form a negative pressure suction air path communicated with the negative pressure generating device and the first conduit;
optionally, a thrombus screen is arranged in the sealing tank body.
7. A thrombus aspiration system according to claim 6, wherein a first catheter connector and a second catheter connector are provided on the top cover of the sealing canister body; 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 conduit joint is connected with the first conduit, the outer end of the second conduit joint is connected with the second conduit, and the other end of the second conduit is connected with the negative pressure generating device;
the thrombus screen is positioned below the first and second catheter connectors;
optionally, the thrombus collection assembly further comprises a thrombectomy catheter adapter coupled to the outer end of the first catheter.
8. A thrombus aspiration system according to claim 7, wherein the thrombus collection assembly further comprises a septum disposed at the inner end of the second catheter adapter;
optionally, the diaphragm is secured to the second conduit joint by a snap assembly.
9. An aspiration negative pressure control method applied to the thrombus aspiration system according to any one of claims 1 to 8, the method comprising:
acquiring suction negative pressure information of the thrombus suction system after the negative pressure pump is started in real time;
obtaining 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 value between the negative pressure pump and the thrombus suction assembly;
if the absolute value of the suction negative pressure of the thrombus suction system is greater than or equal to a preset opening threshold value, opening a suction pipeline of the thrombus suction system, and if the absolute value of the suction negative pressure is less than or equal to a preset closing threshold value, closing the suction pipeline; the preset turn-on threshold is greater than the preset turn-off threshold.
10. An aspiration negative pressure control device, which is provided in the thrombus aspiration system according to any one of claims 1 to 8, the device comprising:
the acquisition module is used for acquiring suction negative pressure information of the thrombus suction system after the negative pressure pump is started in real time;
the calculation module is used for obtaining 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 value between the negative pressure pump and the thrombus suction assembly;
the control module is used for switching on a suction pipeline of the thrombus suction system if the absolute value of the suction negative pressure of the thrombus suction system is greater than or equal to a preset switching-on threshold value, and switching off the suction pipeline if the absolute value of the suction negative pressure is less than or equal to a preset switching-off threshold value; the preset turn-on threshold is greater than the preset turn-off threshold.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211372787.5A CN115644988A (en) | 2022-11-02 | 2022-11-02 | Thrombus aspiration system, aspiration negative pressure control method and device |
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| CN202211372787.5A CN115644988A (en) | 2022-11-02 | 2022-11-02 | Thrombus aspiration system, aspiration negative pressure control method and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117100357A (en) * | 2023-09-08 | 2023-11-24 | 迈得诺医疗科技集团有限公司 | Sterile suction device and control method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117100357A (en) * | 2023-09-08 | 2023-11-24 | 迈得诺医疗科技集团有限公司 | Sterile suction device and control method thereof |
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