Electromagnetic device for removing biological clots

Abstract

The invention relates to the technical field of medical instruments, and discloses an electromagnetic device for removing biological clots, comprising: a silicon-based base on which an accommodating groove and an isolating valve are formed; the spiral extrusion rod is arranged on the silicon-based base, and the periphery of the spiral extrusion rod is communicated with the inlet of the accommodating groove; the electromagnetic film driving unit is arranged on the silicon-based base, the electromagnetic film driving unit comprises an electromagnetic movable piece, the electromagnetic movable piece comprises a silicon substrate and a movable film arranged on the silicon substrate, and the movable film can deform in the depth direction of the containing cavity; a placing cavity is defined in the shell, and the silicon-based base, the spiral extrusion rod and the electromagnetic film driving unit are all fixed in the placing cavity; and the output end of the driving part is connected with the shell. According to the electromagnetic device for removing the biological clots, the biological clots can be more efficiently removed on the premise that damage to blood vessels is reduced, and the success probability of an operation is increased.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to an electromagnetic device for removing biological clots. BACKGROUND

[0002] In the field of treatment of intravascular thrombus obstruction, thrombus aspiration is an important minimally invasive interventional treatment method, and its operation principle is to use a catheter to accurately reach the thrombus position and rely on negative pressure to achieve direct extraction and removal of the thrombus. However, in clinical practice, it is found that for complex biological clots such as old thrombus with high degree of fibrosis and large volume high-load thrombus, the traditional aspiration method has significant limitations, not only the removal efficiency is poor, but also it is difficult to completely remove the lesion, and the biological clot may be broken during the operation process, causing complications such as distal embolism. At the same time, the various mechanical resection devices currently used often face a high treatment failure rate when dealing with such complex biological clots, causing some patients to have to undergo a second operation intervention, thereby increasing the medical burden of patients. Since biological clot obstruction can cause acute ischemic stroke, myocardial infarction and other serious conditions, there is an urgent need for a device that can efficiently, safely and completely remove biological clots. SUMMARY

[0003] Based on the above, the purpose of the present application is to provide an electromagnetic device for removing biological clots, which can more efficiently remove biological clots while reducing damage to blood vessels, thereby increasing the success probability of the operation.

[0004] To achieve the above purpose, the present application adopts the following technical solutions:

[0005] An electromagnetic device for removing biological clots, comprising:

[0006] A silicon base seat having a containing groove and an isolation valve formed thereon, the isolation valve being located at the outlet of the containing groove for controlling the on-off of the containing groove;

[0007] A spiral extrusion rod arranged on the silicon base seat and having an outer periphery in communication with the inlet of the containing groove;

[0008] An electromagnetic film driving unit arranged on the silicon base seat and surrounding the containing groove to form a closed containing cavity, the electromagnetic film driving unit comprising an electromagnetic movable member, the electromagnetic movable member comprising a silicon substrate and a movable film arranged on the silicon substrate, the movable film being capable of deforming along the depth direction of the containing cavity to change the volume of the containing cavity;

[0009] A housing defining a placement cavity therein, the silicon base seat, the spiral extrusion rod and the electromagnetic film driving unit being fixed in the placement cavity;

[0010] A driving member, an output end of which is connected with the shell, the driving member being configured to drive the shell to rotate the silicon substrate, the spiral extrusion rod and the electromagnetic film driving unit.

[0011] As a preferred solution of the electromagnetic device for removing biological coagulation, the silicon substrate is provided with a movable groove on the side away from the movable film, the electromagnetic movable member further comprises a conductive coil arranged on the movable film, the electromagnetic film driving unit further comprises a magnetic block opposite to the conductive coil and a clamp for clamping the magnetic block, the clamp is fixed on the side of the silicon substrate away from the movable film and surrounds the movable groove to form a movable cavity.

[0012] As a preferred solution of the electromagnetic device for removing biological coagulation, the conductive coil is a spiral coil coiled in the movable film, the spiral coil has a T-shaped cross section, the T-shaped cross section comprises a horizontal cross section and a vertical cross section, the horizontal cross section is embedded in the movable film, and part of the vertical cross section is embedded in the movable film and the rest part extends out of the movable film and into the movable cavity.

[0013] As a preferred solution of the electromagnetic device for removing biological coagulation, the two free ends of the spiral coil are located at the outer ring of the spiral coil, the electromagnetic movable member is provided with two connecting leads and two metal PADs, each of the connecting leads is electrically connected with one of the free ends of the spiral coil and one of the metal PADs.

[0014] As a preferred solution of the electromagnetic device for removing biological coagulation, the silicon substrate is provided with an embedding groove, the movable film comprises a circumferential fixed film and a middle movable film, the circumferential fixed film is arranged along the circumference of the middle movable film, the circumferential fixed film is provided with a fixed protrusion, the fixed protrusion is embedded in the embedding groove, and the middle movable film is opposite to the movable groove.

[0015] As a preferred solution of the electromagnetic device for removing biological coagulation, the electromagnetic movable member further comprises a passivation layer and a bonding layer, the passivation layer is formed on the silicon substrate, and the bonding layer is formed between the passivation layer and the movable film.

[0016] As a preferred solution of the electromagnetic device for removing biological coagulation, the passivation layer is a silicon dioxide layer, the bonding layer is a nickel layer, and the movable film is a PDMS film.

[0017] As a preferred solution of the electromagnetic device for removing biological coagulation, the spiral extrusion rod comprises an extrusion rod body, a first spiral blade and a second spiral blade, the first spiral blade and the second spiral blade are staggered and wound on the outer surface of the extrusion rod body, and the rotational directions of the first spiral blade and the second spiral blade are opposite.

[0018] As a preferred solution of the electromagnetic device for removing biological coagulation, the silicon base is further provided with a flow channel and a communication port, the communication port communicates the flow channel and the accommodating cavity, the isolation valve is a comb electrode, the comb electrode includes a movable comb and a fixed comb, the movable comb can reciprocate along a preset direction relative to the fixed comb, and abuts or separates from the communication port, so as to isolate or communicate the flow channel and the accommodating cavity.

[0019] The present application has the following advantages:

[0020] The electromagnetic device for removing biological coagulation disclosed by the present application, when removing biological coagulation, the driving member drives the shell and the spiral extrusion rod to rotate, the centrifugal force generated by the rotation of the spiral extrusion rod can effectively drive the biological coagulation to rotate at high speed, so as to completely separate and throw out the particulate matters in the biological coagulation, and fully compress the volume of the biological coagulation. Thereafter, the movable film of the electromagnetic film driving unit deforms in the depth direction away from the accommodating cavity to increase the volume of the accommodating cavity, so as to reduce the pressure in the accommodating cavity, and achieve the effect of rapidly reducing the internal pressure of the accommodating cavity. A stable negative pressure environment is formed in the accommodating cavity, and the negative pressure condition cooperates with the centrifugal force generated by the rotation of the spiral extrusion rod to efficiently and rapidly suck the biological coagulation into the accommodating cavity. Finally, the isolation valve is opened, and the movable film of the electromagnetic film driving unit deforms in the direction towards the accommodating cavity to reduce the volume of the accommodating cavity, so as to discharge the biological coagulation in the accommodating cavity. Compared with directly sucking the biological coagulation by means of negative pressure, the mechanical damage to the blood vessel wall is reduced, the risk of intraoperative damage to the blood vessel is reduced, and the biological coagulation can be more completely removed, thereby improving the success probability of the operation. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments of the present application will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art according to the contents of the embodiments of the present application and the drawings without creative labor.

[0022] Figure 1 is a longitudinal sectional view of the electromagnetic device for removing biological coagulation provided by the specific embodiments of the present application;

[0023] Figure 2 is a transverse sectional view of the electromagnetic device for removing biological coagulation provided by the specific embodiments of the present application;

[0024] Figure 3 is a plan view of the isolation valve of the electromagnetic device for removing biological coagulation provided by the specific embodiments of the present application;

[0025] Figure 4 is a schematic view of a spiral coil of an electromagnetic device for removing biological clots provided by specific embodiments of the present application.

[0026] In the drawings:

[0027] 1, silicon base seat; 101, containing cavity; 102, flow channel; 103, communication port; 104, annular liquid inlet; 11, isolation valve; 111, movable comb tooth; 112, fixed comb tooth;

[0028] 2, spiral extrusion rod; 21, extrusion rod body; 22, first spiral blade; 23, second spiral blade;

[0029] 3, electromagnetic film driving unit; 31, electromagnetic movable part; 311, silicon substrate; 3110, movable cavity; 312, movable film; 3121, circumferential fixed film; 31211, fixed protrusion; 3122, middle movable film; 313, conductive coil; 314, passivation layer; 315, adhesive layer; 32, magnetic block; 33, clamp;

[0030] 4, housing. DETAILED DESCRIPTION

[0031] In order to make the technical problems solved by the present application, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present application will be further described in detail below with reference to the drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0032] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0033] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; or internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0034] This embodiment provides an electromagnetic device for removing bioclots, such as... Figures 1 to 4 As shown, the device includes a silicon-based base 1, a spiral extrusion rod 2, an electromagnetic membrane drive unit 3, a housing 4, and a drive component (not shown in the figure). The silicon-based base 1 has a receiving groove and an isolation valve 11. The isolation valve 11 is located at the outlet of the receiving groove and is used to control the opening and closing of the receiving groove. The spiral extrusion rod 2 is disposed on the silicon-based base 1, and its outer periphery is connected to the inlet of the receiving groove. The electromagnetic membrane drive unit 3 is disposed on the silicon-based base 1 and surrounds the receiving groove to form a closed receiving cavity 101. The electromagnetic membrane drive unit 3 includes an electromagnetic movable element 31, which includes a silicon substrate 311 and a movable membrane 312 disposed on the silicon substrate 311. The movable membrane 312 can deform along the depth direction of the receiving cavity 101 to change the volume of the receiving cavity 101. The housing 4 defines a placement cavity. The silicon-based base 1, the spiral extrusion rod 2, and the electromagnetic membrane drive unit 3 are all fixed in the placement cavity. The output end of the drive component is connected to the housing 4. The drive component is configured to drive the housing 4 to rotate the silicon-based base 1, the spiral extrusion rod 2, and the electromagnetic membrane drive unit 3. Specifically, the driving component in this embodiment is a micro motor with a rotation speed of tens of thousands of revolutions per minute. Micro motors are existing technology and can be obtained through external purchase, so they will not be described in detail here.

[0035] Specifically, in this embodiment, the bioclot is a thrombus, the particulate matter is red blood cells, and the spiral extrusion rod 2 can drive the thrombus to rotate at high speed, thereby completely separating and ejecting the red blood cells within the thrombus, effectively reducing its volume and facilitating subsequent discharge. In other embodiments, the bioclot can also be a blood clot, fibrin clump, or other structures formed by the aggregation of blood components, and the particulate matter can also be cell fragments, microparticles, or other substances.

[0036] The electromagnetic device for removing biological clots in the embodiment can effectively drive the biological clots to rotate at a high speed, so that the particulate matters in the biological clots are completely separated and thrown out, and the volume of the biological clots is fully compressed. Thereafter, the movable film 312 of the electromagnetic film driving unit 3 is deformed in a direction away from the depth of the containing cavity 101 to increase the volume of the containing cavity 101, so that the pressure in the containing cavity 101 is reduced, achieving the effect of rapidly reducing the internal pressure of the containing cavity 101. A stable negative pressure environment is formed in the containing cavity 101, and the negative pressure condition cooperates with the centrifugal force generated by the rotation of the spiral extrusion rod 2 to efficiently and rapidly suck the biological clots into the containing cavity 101. Finally, the isolation valve 11 is opened, and the movable film 312 of the electromagnetic film driving unit 3 is deformed in a direction towards the containing cavity 101 to reduce the volume of the containing cavity 101, so that the biological clots in the containing cavity 101 are discharged. Compared with directly sucking the biological clots by means of negative pressure, the mechanical damage to the blood vessel wall is reduced, the risk of intraoperative damage to the blood vessel is reduced, the biological clots can be more completely removed, and the success probability of the operation is improved.

[0037] The silicon substrate 311 opposite to the movable film 312 is provided with a movable groove, as shown in Figure 2 The electromagnetic movable member 31 further includes a conductive coil 313 arranged on the movable film 312, the electromagnetic film driving unit 3 further includes a magnetic block 32 opposite to the conductive coil 313 and a clamp 33 for clamping the magnetic block 32, the magnetic block 32 is a permanent magnet, and the clamp 33 is fixed on the side of the silicon substrate 311 opposite to the movable film 312 and surrounds the movable groove to form a movable cavity 3110. When the conductive coil 313 applies current, the conductive coil 313 generates an electromagnetic field, the electromagnetic field interacts with the magnetic field of the magnetic block 32 to generate an electromagnetic force, the electromagnetic force drives the movable film 312 to reciprocally deform in the depth direction of the containing cavity 101 to reduce or increase the volume of the containing cavity 101, so as to increase or reduce the internal pressure of the containing cavity 101, and then the biological clots are discharged or flowed into the containing cavity 101.

[0038] The conductive coil 313 in the embodiment is a spiral coil spirally arranged in the movable film 312, as shown in Figure 2 and Figure 4As shown, the cross-section of the helical coil is a T-shaped section, which includes a vertical horizontal section and a vertical section. The horizontal section is embedded in the movable diaphragm 312, and part of the vertical section is embedded in the movable diaphragm 312, while the remaining structure extends out of the movable diaphragm 312 and into the movable cavity 3110. The conductive coil 313 embedded in the movable diaphragm 312 not only increases the effective stiffness of the movable diaphragm 312 and significantly restricts its deflection, but the helical coil extending into the movable cavity 3110 also increases the cross-sectional area of ​​the conductive coil 313, reduces its resistance, and reduces the generation of Joule heat, thereby reducing power consumption and giving the electromagnetic movable component 31 good stability.

[0039] In this embodiment, both free ends of the spiral coil are located on its outer ring. The electromagnetic movable part 31 is provided with two connecting leads (not shown in the figure) and two metal PADs (not shown in the figure). The two connecting leads, the two metal PADs, and the free ends of the two spiral coils correspond one-to-one. The two ends of each connecting lead are in contact with one free end of a spiral coil and one metal PAD, respectively, so that the free ends of the spiral coils are electrically connected to the metal PADs through the connecting leads. Since both free ends of the spiral coil are located on the outer ring, the two connecting leads can be directly formed on the silicon substrate 311 through a doping process. The two connecting leads are in contact with the two free ends of the two spiral coils, respectively. Then, two metal PADs are formed on the silicon substrate 311 to contact the two connecting leads, respectively, thus realizing the electrical connection between the free ends of the spiral coils and the metal PADs through the connecting leads. Compared with the additional gold wire bonding method, this electrical connection method not only has lower parasitic inductance and resistance, but also has better reliability and environmental adaptability.

[0040] The silicon substrate 311 in this embodiment is also provided with an embedding groove (not shown in the figure), such as Figure 2 As shown, the movable membrane 312 includes a circumferentially fixed membrane 3121 and a central movable membrane 3122. The circumferentially fixed membrane 3121 is arranged circumferentially along the central movable membrane 3122. A fixing protrusion 31211 is provided on the circumferentially fixed membrane 3121, which is embedded in the embedding groove. The central movable membrane 312 faces the movable groove. The added fixing protrusion 31211 increases the contact area and adhesion between the movable membrane 312 and the silicon substrate 311 without sacrificing the degree of freedom of the movable membrane 312, increases the connection strength between the movable membrane 312 and the silicon substrate 311, and reduces the probability of the movable membrane 312 detaching from the silicon substrate 311 when moving along the depth direction of the receiving cavity 101. In addition, this structural design can disperse the local stress of the movable membrane 312, reduce fatigue damage caused by repeated movement of the movable membrane 312 along the depth direction of the receiving cavity 101, further reduce the risk of the movable membrane 312 peeling off from the silicon substrate 311 or the gyroscope, and effectively improve the structural stability and reliability of the electromagnetic device used to remove biological clots.

[0041] As Figure 2 shown, the electromagnetic movable part 31 of the embodiment further comprises a passivation layer 314 and a bonding layer 315, the passivation layer 314 is formed on the silicon substrate 311, and the bonding layer 315 is formed between the passivation layer 314 and the movable film 312. The passivation layer 314 is a silicon dioxide layer, the bonding layer 315 is a nickel layer, and the movable film 312 is a PDMS film. Since the PDMS film itself is very soft and it is difficult to adhere directly to the silicon substrate 311, it is necessary to first process the silicon dioxide layer and the nickel layer in sequence, and then form the PDMS film on the nickel layer. The silicon dioxide layer acts as an insulating layer and a sacrificial layer, not only effectively separates the conductive silicon substrate 311 and the conductive nickel layer to prevent device short circuit, but also blocks the diffusion between silicon and nickel to prevent the formation of unnecessary silicides and affect the device performance. The nickel layer not only provides effective rigidity support for the PDMS film, but also makes the PDMS film firmly adhere to it, reducing the probability of PDMS film falling off. It should be noted that in other embodiments of the present application, the passivation layer 314 can also be a silicon nitride layer, and the bonding layer 315 can also be a titanium layer or a cadmium layer, etc. The specific setting is based on actual needs.

[0042] As Figure 1 shown, the spiral extrusion rod 2 of the embodiment comprises an extrusion rod body 21, a first spiral blade 22 and a second spiral blade 23, the first spiral blade 22 and the second spiral blade 23 are staggered and wound on the outer surface of the extrusion rod body 21, and the rotational directions of the two are opposite. When the first spiral blade 22 and the second spiral blade 23 rotate, they generate torques in opposite directions and abut each other. The net torque of the spiral extrusion rod 2 is zero, which increases the torsional performance of the spiral extrusion rod 2. The extrusion rod body 21 only needs to bear axial force and radial force, greatly improving the rigidity and stability of the extrusion rod body 21.

[0043] As Figure 3 shown, the silicon base seat 1 of the embodiment is further provided with a flow channel 102 and a communication port 103, the communication port 103 communicates the flow channel 102 and the containing cavity 101, the isolation valve 11 is a comb electrode, the comb electrode comprises a movable comb tooth 111 and a fixed comb tooth 112, the movable comb tooth 111 can reciprocate along a preset direction relative to the fixed comb tooth 112, and abut or separate from the communication port 103, so as to isolate or communicate the flow channel 102 and the containing cavity 101. The preset direction is the flow direction of the biological clot, that is Figure 1 the arrow direction shown.

[0044] Specifically, when the biological clot in the containing cavity 101 needs to be discharged, the movable comb teeth 111 move towards the direction away from the communication port 103, the movable comb teeth 111 are separated from the communication port 103, the flow channel 102 is communicated with the containing cavity 101, the movable film 312 of the electromagnetic film driving unit 3 moves towards the containing cavity 101, the pressure in the containing cavity 101 increases, and the biological clot is conveniently discharged outward. At this time, since the whole structure is in a rotating state, the air pressure in the containing cavity 101 is still lower than the ambient pressure, so the biological clot will not be discharged outward from the inlet of the containing cavity 101, but will flow to the flow channel 102 from the communication port 103.

[0045] As shown in Figure 2 The annular liquid inlet 104 is provided on the silicon base 1 of the embodiment, and the annular liquid inlet 104 is communicated with the containing cavity 101, that is, the annular liquid inlet 104 is the inlet of the containing cavity 101. The inner circle diameter of the annular liquid inlet 104 is equal to the diameter of the extrusion rod body 21, and the outer circle diameter of the annular liquid inlet 104 is equal to the radius of the projection of the spiral extrusion rod 2 on the silicon base 1 along the axial direction of itself. This arrangement allows the biological clot after volume reduction to be directly sucked into the containing cavity 101. In other embodiments, the inner circle diameter of the annular liquid inlet 104 can be greater than or less than the diameter of the extrusion rod body 21, and the outer circle diameter of the annular liquid inlet 104 can be less than or greater than the radius of the projection of the spiral extrusion rod 2 on the silicon base 1 along the axial direction of itself. The specific arrangement is selected according to actual needs.

[0046] The shell 4 of the embodiment is filled with a filler to constrain the silicon base 1, the spiral extrusion rod 2 and the electromagnetic film driving unit 3, so that when the driving member drives the shell 4 to rotate, the structure in the shell 4 is stationary relative to the shell 4, ensuring the stability of operation. The filler can be made of silica gel or other deformable materials, and the specific selection is selected according to actual needs, which is not limited here.

[0047] When the electromagnetic device for removing biological clots is used to remove biological clots, the micro motor drives the silicon base 1, the spiral extrusion rod 2, the electromagnetic film driving unit 3 and the shell 4 to rotate at high speed, the biological clots in the blood vessel are wound on the spiral extrusion rod 2, the centrifugal force generated by the rotation of the spiral extrusion rod 2 can effectively drive the biological clots to rotate at high speed, so as to completely separate and throw out the particulate matters in the biological clots, and the volume of the biological clots is fully compressed; then, the movable comb teeth 111 move towards the direction close to the communication port 103, the movable comb teeth 111 abut against the communication port 103, the flow channel 102 is isolated from the containing cavity 101, at the same time, the current is applied to the conductive coil 313, the movable film 312 of the electromagnetic film driving unit 3 deforms towards the direction away from the depth of the containing cavity 101, the volume of the containing cavity 101 increases, the air pressure in the containing cavity 101 decreases, and the negative pressure condition cooperates with the centrifugal force generated by the rotation of the spiral extrusion rod 2 to suck the biological clots with reduced volume into the containing cavity 101; finally, the movable comb teeth 111 move away from the communication port 103, the movable comb teeth 111 are separated from the communication port 103, the flow channel 102 is communicated with the containing cavity 101, at the same time, the current is applied to the conductive coil 313, the movable film 312 of the electromagnetic film driving unit 3 deforms towards the inside of the containing cavity 101, the volume of the containing cavity 101 decreases, the air pressure in the containing cavity 101 increases, and the biological clots in the containing cavity 101 are discharged to the flow channel 102 through the communication port 103.

[0048] Compared with directly sucking the biological clots by negative pressure, the structure for removing biological clots in the embodiment reduces the mechanical damage to the blood vessel wall, reduces the risk of intraoperative damage to the blood vessel, and can more thoroughly remove the biological clots, thereby improving the success probability of the operation.

[0049] It should be noted that the above are only the preferred embodiments of the present application and the technical principles applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and those skilled in the art can make various obvious changes, readjustments and substitutions without departing from the protection scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. An electromagnetic device for removing bioclots, characterized in that, include: A silicon-based base having a receiving groove and an isolation valve formed thereon, the isolation valve being located at the outlet of the receiving groove and used to control the opening and closing of the receiving groove; A spiral extrusion rod is disposed on the silicon-based base, and its outer periphery is connected to the inlet of the receiving groove; An electromagnetic membrane driving unit is disposed on the silicon substrate and surrounds the receiving groove into a sealed receiving cavity. The electromagnetic membrane driving unit includes an electromagnetic movable element, which includes a silicon substrate and a movable membrane disposed on the silicon substrate. The movable membrane can deform along the depth direction of the receiving cavity to change the volume of the receiving cavity. The housing defines a placement cavity, and the silicon-based base, the spiral extrusion rod, and the electromagnetic membrane drive unit are all fixed inside the placement cavity; A driving element, the output end of which is connected to the housing, is configured to drive the housing to rotate the silicon-based base, the spiral extrusion rod, and the electromagnetic membrane driving unit.

2. The electromagnetic device for removing bioclots according to claim 1, characterized in that, The silicon substrate has a movable groove on the side away from the movable film. The electromagnetic movable component also includes a conductive coil disposed on the movable film. The electromagnetic film driving unit also includes a magnetic block facing the conductive coil and a clamp for holding the magnetic block. The clamp is fixed on the side of the silicon substrate away from the movable film and surrounds the movable groove to form a movable cavity.

3. The electromagnetic device for removing bioclots according to claim 2, characterized in that, The conductive coil is a spiral coil coiled inside the movable membrane. The cross-section of the spiral coil is a T-shaped section, which includes a vertical horizontal section and a vertical section. The horizontal section is embedded in the movable membrane, a portion of the vertical section is embedded in the movable membrane, and the remaining portion extends out of the movable membrane and into the movable cavity.

4. The electromagnetic device for removing bioclots according to claim 3, characterized in that, Both free ends of the spiral coil are located on its outer ring. The electromagnetic movable part is provided with two connecting leads and two metal PADs. Each of the connecting leads is electrically connected to one free end of the spiral coil and one of the metal PADs, respectively.

5. The electromagnetic device for removing bioclots according to claim 2, characterized in that, The silicon substrate has an embedding groove. The movable film includes a circumferential fixed film and a central movable film. The circumferential fixed film is arranged along the circumference of the central movable film. The circumferential fixed film has a fixing protrusion, which is embedded in the embedding groove. The central movable film is directly opposite the movable groove.

6. The electromagnetic device for removing bioclots according to claim 1, characterized in that, The electromagnetic movable component further includes a stacked passivation layer and an adhesive layer, wherein the passivation layer is formed on the silicon substrate and the adhesive layer is formed between the passivation layer and the movable film.

7. The electromagnetic device for removing bioclots according to claim 6, characterized in that, The passivation layer is a silicon dioxide layer, the adhesive layer is a nickel layer, and the movable film is a PDMS film.

8. The electromagnetic device for removing bioclots according to claim 1, characterized in that, The spiral extrusion rod includes an extrusion rod body, a first spiral blade, and a second spiral blade. The first spiral blade and the second spiral blade are alternately wound around the outer surface of the extrusion rod body, and their spiral directions are opposite.

9. The electromagnetic device for removing bioclots according to claim 1, characterized in that, The silicon-based base is also provided with a flow channel and a connecting port. The connecting port connects the flow channel and the receiving cavity. The isolation valve is a comb electrode. The comb electrode includes movable comb teeth and fixed comb teeth. The movable comb teeth can reciprocate relative to the fixed comb teeth in a preset direction and abut or separate from the connecting port, so that the flow channel is isolated from or connected to the receiving cavity.

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