Coronary artery protection device

Abstract

The invention discloses a coronary artery protection device, which belongs to the field of coronary artery protection and comprises a catheter, a temperature control mechanism is mounted in the catheter, a flow and flow velocity detection mechanism is mounted at one end of the catheter, and a filtering mechanism is mounted on the surface of the catheter. The filtering mechanism comprises elastic filter screens mounted on the surface of the guide pipe in a path array manner, and elastic rings are fixedly connected to the surfaces of the elastic filter screens; through cooperative use of the devices, a bidirectional motor is started, an electric push rod drives a cam to rotate, the cam pushes an elastic ring to extrude an elastic piece and slide in a sliding groove, and after the cam is separated from the elastic ring, the elastic ring is reset and impacts the inner wall of the sliding groove based on the elastic force of the elastic piece; the elastic ring and the elastic filter screen are vibrated, so that embolism substances blocked on the elastic filter screen are separated from the filter holes, abnormal rising of blood flowing pressure in the coronary artery is prevented, and vascular fibrosis and formation of aneurysm are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of coronary artery protection, in particular to a coronary artery protection device. Background Art

[0002] The coronary arteries are arteries that supply blood to the heart. They originate in the aortic sinus at the root of the aorta, divide into left and right branches, and run along the surface of the heart. Coronary artery protection devices are special instruments used in interventional cardiology to prevent intraoperative embolic events. Coronary artery protection devices are mainly used to capture plaque fragments or blood clots that may fall off during coronary interventional procedures (such as stent implantation) to prevent them from blocking downstream blood vessels with the blood flow, thereby reducing the risk of surgical complications.

[0003] Existing coronary artery protection devices generally consist of a guidewire, filter, delivery sheath, retrieval sheath, and operating handle. The delivery sheath wraps the filter into a folded state, which is then inserted into the coronary artery using the guidewire. Once the filter reaches the designated position, the delivery sheath is retracted, allowing the filter to unfold and fit against the inner wall of the coronary artery, intercepting embolic material in the coronary artery. After the procedure, the retrieval sheath is placed over the guidewire and pushed into the open filter position. When the retrieval sheath encases the filter, the filter and captured debris are closed within the sheath through retraction or mechanical action, and then the entire device is withdrawn from the body, preventing debris from falling out of the retrieval sheath during withdrawal.

[0004] However, during the capture of embolic material by the above method, the embolic material may be clogged in the filter pores, hindering the flow of blood inside the coronary artery, thereby causing an abnormal increase in blood flow pressure. The increased pressure increases the circumferential tension on the blood vessel wall, leading to endothelial cell damage, smooth muscle cell proliferation and extracellular matrix remodeling, and ultimately triggering vascular fibrosis or aneurysm formation, causing other impacts on the coronary artery during coronary artery surgery, thereby causing damage to the patient's health.

[0005] Therefore, the present invention provides a coronary artery protection device to solve the above problems. Summary of the Invention

[0006] (1) Technical problems solved

[0007] The present invention provides a coronary artery protection device, aiming to solve the problems raised in the background technology.

[0008] (2) Technical solution

[0009] To achieve the above objectives, the present invention provides the following technical solutions: a coronary artery protection device, comprising a catheter, a temperature control mechanism installed inside the catheter, a flow rate and velocity detection mechanism installed at one end of the catheter, and a filtering mechanism installed on the surface of the catheter;

[0010] The filtering mechanism includes an elastic filter screen installed on the surface of the catheter in a path array, the surface of the elastic filter screen is fixedly connected to an elastic ring, the surface of the elastic ring is fixedly connected to an elastic member in a ring array, the surfaces of several elastic members are commonly fixedly connected to a support ring that is slidably sleeved on the surface of the elastic ring and corresponds to the elastic filter screen, both sides of the lower surface of the elastic ring are fitted with cams corresponding to the elastic members, the surface of the cam is fixedly connected to an electric push rod, the opposite sides of the two electric push rods are commonly fixedly connected to a bidirectional motor fixedly connected to the inside of the catheter, and a deformation mechanism is installed inside the elastic ring.

[0011] As a preferred technical solution of the present application, the filtering mechanism also includes a pushing sleeve fixedly connected to the upper surface of one of the elastic filter screens and slidably sleeved on the surface of the catheter, the surface of the pushing sleeve is threadedly connected to a threaded rod, one end of the threaded rod is fixedly connected to a driving source fixedly connected to the catheter, and a guide rod corresponding to the threaded rod is slidably inserted on one side of the surface of the pushing sleeve.

[0012] As a preferred technical solution of the present application, the filtering mechanism also includes an elastic sleeve which is fixedly connected to the opposite sides of several elastic rings and is sleeved on the surface of the catheter, wherein one of the elastic filter screens is fixedly connected to the catheter, and the other elastic filter screen is slidably connected to the catheter.

[0013] As a preferred technical solution of the present application, the flow rate and velocity detection mechanism includes a mounting tube fixedly connected to the upper surface of the conduit, the interior of the mounting tube is fixedly connected to a flow sensor corresponding to the elastic filter in an annular array, the interior of the mounting tube is fixedly connected to a drive motor, the output end of the drive motor is fixedly connected to a screw rod rotatably connected to the mounting tube, and one end of the screw rod is rotatably sleeved with a mounting plate corresponding to the elastic filter.

[0014] As a preferred technical solution of the present application, the flow rate and velocity detection mechanism also includes a fixing sleeve fixedly connected to the upper surface of the mounting plate by bolts, the interior of the fixing sleeve is fixedly connected to a Doppler ultrasonic flow velocity sensor corresponding to the interior of the coronary artery, and the lower surface of the mounting plate is fixedly connected to a connecting plate fixedly connected to the elastic filter screen in an annular array.

[0015] As a preferred technical solution of the present application, the temperature control mechanism includes a heating plate fixedly connected to the inside of the catheter and corresponding to the catheter, the interior of the heating plate is fixedly connected to an electric heating plate in a ring array, and the surface of the catheter is fixedly connected to a temperature sensor corresponding to the heating plate in a path array.

[0016] As a preferred technical solution of the present application, the surfaces of several of the support rings are fixedly connected in an annular array with pressure sensors corresponding to the inner wall of the coronary artery, two of the electric push rods are rotatably connected to the catheter, and the other two electric push rods are slidably connected to the catheter, and a sliding groove corresponding to the elastic ring is opened inside the support ring.

[0017] As a preferred technical solution of the present application, the deformation mechanism includes a flexible driving rod fixedly connected to the inside of the catheter and connected to the existing driving device, one end of the flexible driving rod is equipped with a rotating ring corresponding to the elastic ring, the surface of the rotating ring is rotatably connected to a rotating rod fixedly connected to the elastic ring, and the surface of the rotating rod is rotatably connected to a rotating plate rotatably connected to the rotating ring.

[0018] (3) Beneficial effects

[0019] 1. Based on the interaction of the filtering mechanism and other components and the deformation mechanism, the two elastic filters and the elastic ring are expanded inside the coronary artery, so that the support ring and the pressure sensor fit the inner wall of the coronary artery, allowing the elastic filter to filter embolic substances in the coronary artery. Based on the pressure detected by the pressure sensor, the area of ​​the elastic filter expanded by the deformation mechanism is adjusted, causing the area of ​​the support ring to change synchronously, thereby making the support ring fit more closely with the inner wall of the coronary artery while avoiding damage to the inner wall of the coronary artery caused by excessive support of the support ring;

[0020] 2. The blood flow through the elastic filter is detected by a flow sensor. When the blood flow is lower than the threshold, the bidirectional motor is automatically started, causing the electric push rod to drive the cam to rotate, causing the cam to push the elastic ring to squeeze the elastic part and slide inside the sliding groove. When the cam is separated from the elastic ring, the elastic force of the elastic part causes the elastic ring to reset and hit the inner wall of the sliding groove, causing the elastic ring and the elastic filter to vibrate, causing embolic materials blocked in the elastic filter to separate from the filter pores, preventing abnormal increase in blood flow pressure in the coronary artery and avoiding the formation of vascular fibrosis and aneurysms.

[0021] 3. Based on the mutual cooperation of multiple elastic filters and elastic sleeves, the elastic filters perform multiple filtrations on embolic materials inside the coronary arteries. After the blood and embolic materials are filtered once, the blood and relatively small embolic materials enter the elastic sleeve. A buffer cavity is formed between the elastic sleeve and the multiple support rings. After the blood stays in the buffer cavity for a period of time, it is filtered again through the corresponding elastic filters due to the entry of more blood. Based on the setting of the buffer cavity, the blood retention effect is used to reduce the flow rate, avoiding the turbulence caused by uneven flow rate, which may cause the intercepted small emboli to fall off the edge of the filter, or even cause damage to the coronary artery and coronary artery branches due to excessive flow rate.

[0022] 4. By setting up components such as the pushing sleeve and the driving source, the blood flow rate and flow rate are detected based on the flow rate and flow rate detection mechanism. When the blood flow rate inside the coronary artery is too fast, the driving source is started to drive the threaded rod to rotate, so that the pushing sleeve moves, thereby pushing the corresponding support ring to slide on the surface of the catheter, causing the elastic sleeve to deform and grow, thereby increasing the volume of the buffer cavity and prolonging the residence time of blood inside the buffer cavity, thereby further controlling the blood flow rate and avoiding the problem of blood flow acceleration caused by blood passing through multiple layers of elastic filters;

[0023] 5. Based on the mutual cooperation of the drive motor and the lead screw and other structures, when the flow of blood passing through the elastic filter decreases, the drive motor is started while the cam drives the elastic ring to extrude the elastic part, so that the fixed sleeve and the Doppler ultrasonic flow velocity sensor are driven to slide at one end of the catheter, so that the mounting plate moves synchronously, thereby causing the connecting plate to pull one side of the elastic filter to move, causing the elastic filter to deform, thereby causing the filter holes of the elastic filter to passively deform and increase, further accelerating the separation of embolic substances from the filter holes, and further preventing the abnormal increase of blood flow pressure in the coronary artery. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the structure of a coronary artery protection device;

[0025] Figure 2 This is a schematic structural diagram of a coronary artery protection device from a second perspective;

[0026] Figure 3 This is a schematic diagram of the structure of a filtering mechanism in a coronary artery protection device;

[0027] Figure 4 This is a schematic diagram of the structure of a support ring and an elastic ring in a coronary artery protection device;

[0028] Figure 5 A schematic diagram of the structure of a support ring, an elastic ring, and an electric push rod in a coronary artery protection device;

[0029] Figure 6 This is a schematic diagram of the structure of a support ring, a pressure sensor, and an elastic sleeve in a coronary artery protection device;

[0030] Figure 7 This is a schematic diagram of the structure of a support ring and a mounting tube in a coronary artery protection device;

[0031] Figure 8 This is a schematic diagram of the structure of a flow rate and velocity detection mechanism in a coronary artery protection device;

[0032] Figure 9This is a schematic diagram of the structure of a temperature control mechanism, a catheter, and a filtering mechanism in a coronary artery protection device.

[0033] In the picture:

[0034] 1. Catheter;

[0035] 2. Temperature control mechanism; 201. Heating plate; 202. Electric heating plate; 203. Temperature sensor;

[0036] 3. Flow rate and velocity detection mechanism; 301. Mounting cylinder; 302. Drive motor; 303. Screw; 304. Mounting plate; 305. Fixing sleeve; 306. Doppler ultrasonic flow velocity sensor; 307. Connecting plate; 308. Flow sensor;

[0037] 4. Filter mechanism; 401. Elastic filter screen; 402. Elastic ring; 403. Elastic member; 404. Support ring; 405. Cam; 406. Electric push rod; 407. Bidirectional motor; 408. Push sleeve; 409. Threaded rod; 410. Drive source; 411. Guide rod; 412. Elastic sleeve; 413. Pressure sensor;

[0038] 5. Deformation mechanism; 501. Flexible driving rod; 502. Rotating ring; 503. Rotating rod; 504. Rotating plate. DETAILED DESCRIPTION

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0040] The present invention provides a coronary artery protection device, referring to Figures 1-9 As shown, three embodiments are provided:

[0041] Example 1:

[0042] The coronary artery protection device comprises a catheter 1, a temperature control mechanism 2 is installed inside the catheter 1, a flow rate and velocity detection mechanism 3 is installed at one end of the catheter 1, and a filtering mechanism 4 is installed on the surface of the catheter 1;

[0043] The filtering mechanism 4 includes an elastic filter screen 401 arranged in a linear array along the axis of the catheter 1. The elastic filter screen 401 is made of nickel-titanium alloy and has the characteristics of superelasticity, corrosion resistance, and good biocompatibility. It is suitable for medical scenarios that require elastic deformation and need to be implanted in the human body for a long time. The elastic filter screen 401 is installed on the surface of the catheter 1. The outer edge of the elastic filter screen 401 is fixedly connected to the elastic ring 402. The surface of the elastic ring 402 is fixedly connected to elastic members 403 in an annular array. The surfaces of several elastic members 403 are commonly fixedly connected to a support ring 404 that is slidably sleeved on the surface of the elastic ring 402. The elastic filter screen 401 corresponds to the support ring 404. Cams 405 corresponding to the elastic members 403 are attached to both sides of the lower surface of the elastic ring 402. An electric push rod 406 is fixedly connected to the surface of the cam 405. The opposite sides of the two electric push rods 406 are commonly fixedly connected to a bidirectional motor 407 fixedly connected to the inside of the catheter 1. The deformation mechanism 5 is installed inside the elastic ring 402.

[0044] The elastic filter 401 is used to filter the blood and embolic substances inside the coronary artery;

[0045] The elastic ring 402 and the support ring 404 are used to support the elastic filter 401;

[0046] Among them, the elastic member 403 is used to drive the support ring 404 to automatically reset;

[0047] The bidirectional motor 407 is used to drive the corresponding electric push rod 406 to rotate, and the electric push rod 406 is used to drive the cam 405 to rotate and move;

[0048] The arrangement of multiple elastic filters 401 not only allows for multiple filtration of embolic substances within the coronary artery, but also allows for control of blood flow rate.

[0049] Specifically, the blood and embolic substances in the coronary artery are filtered through multiple elastic filters 401. When the blood flow through the elastic filter 401 decreases, the bidirectional motor 407 is started, and its output end drives the electric push rod 406 to rotate, thereby rotating the cam 405. The two cams 405 push up the elastic ring 402, and the elastic ring 402 slides inside the sliding groove on the support ring 404, causing the elastic member 403 to deform. When the cam 405 is separated from the elastic ring 402, the elastic force of the elastic ring 402 causes the elastic ring 402 to quickly return to its original position and collide with the inner wall of the sliding groove, causing the elastic ring 402 and the elastic filter 401 to vibrate, so that the embolic substances blocked in the elastic filter 401 are separated from the filter pores, thereby preventing the abnormal increase of blood flow pressure in the coronary artery and avoiding the formation of vascular fibrosis and aneurysm.

[0050] The deformation mechanism 5 includes a flexible driving rod 501 fixedly connected to the inside of the catheter 1 and connected to an existing driving device. The existing driving device is a micro motor. The material of the flexible driving rod 501 is one of stainless steel, high-strength aluminum alloy, carbon fiber, and a plastic sheathed steel wire structure. One end of the flexible driving rod 501 is mounted with a rotating ring 502 corresponding to the elastic ring 402. The surface of the rotating ring 502 is rotatably connected to a rotating rod 503 that rotates along the circumferential direction; one end of the rotating rod 503 that is away from the rotating ring 502 is fixedly connected to the inner wall of the elastic ring 402. The surface of the rotating rod 503 is rotatably connected to a rotating plate 504 that is rotatably connected to the rotating ring 502.

[0051] The flexible driving rod 501 is used to drive the rotating ring 502 to rotate, and the rotating ring 502 drives the rotating rod 503 to rotate, so that the rotating rod 503 drives the rotating plate 504 and the elastic ring 402 to expand and retract, thereby controlling the opening and closing of the elastic filter 401;

[0052] One of the rotating rings 502 is rotatably connected to the catheter 1, and the other rotating ring 502 is slidably connected to the catheter 1. One of the rotating rings 502 is fixedly connected to the flexible driving rod 501, and the other rotating ring 502 is slidably connected to the surface of the flexible driving rod 501. A sealing plug corresponding to the electric push rod 406 is fixedly connected to the surface of the catheter 1.

[0053] In particular, based on the arrangement in which one rotating ring 502 is rotatably connected to the conduit 1 and the other rotating ring 502 is slidably connected to the conduit 1, the rotating ring 502 in the rotatable connection is used to control the elastic filter 401 fixedly connected to the conduit 1, and the rotating ring 502 in the slidable connection is used to control the elastic filter 401 in the slidable connection to the conduit 1, thereby avoiding the rotating ring 502 being unable to slide on the conduit 1 and causing the movement of the elastic filter 401 to be slidably blocked;

[0054] In particular, based on the arrangement that one of the rotating rings 502 is fixedly connected to the flexible driving rod 501 and the other rotating ring 502 is slidably connected to the surface of the flexible driving rod 501, the flexible driving rod 501 can drive both rotating rings 502 to rotate. After one of the rotating rings 502 slides on the flexible driving rod 501, the flexible driving rod 501 can still drive it to rotate, thereby avoiding the problem of the corresponding elastic filter 401 being unable to open and close due to the sliding of the rotating ring 502;

[0055] The sealing plug is used to seal the contact position between the electric push rod 406 and the catheter 1 to prevent the blood inside the coronary artery from entering the catheter 1 and being discharged from the inside of the catheter 1 during the rotation and sliding of the electric push rod 406.

[0056] The filter mechanism 4 further includes an elastic sleeve 412 fixedly connected to opposite sides of a plurality of elastic rings 402 and sleeved on the surface of the conduit 1, wherein one elastic filter screen 401 is fixedly connected to the conduit 1, and the other elastic filter screen 401 is slidably connected to the conduit 1;

[0057] The elastic sleeve 412 is used to form a buffer cavity inside the two elastic rings 402;

[0058] Specifically, after the blood inside the coronary artery is filtered through an elastic filter 401, the blood enters the buffer cavity in the elastic sleeve 412. After the blood stays inside the buffer cavity for a period of time, it is filtered twice through the corresponding elastic filter 401 due to the entry of more blood. Based on the setting of the buffer cavity, the blood retention effect is used to reduce the flow rate, thereby avoiding turbulence caused by uneven flow rate, which may cause the intercepted small emboli to fall off from the edge of the filter.

[0059] Embodiment 2, based on embodiment 1, further, the filtering mechanism 4 further includes a pushing sleeve 408 fixedly connected to the upper surface of one of the elastic filter screens 401 and slidably sleeved on the surface of the conduit 1, the surface of the pushing sleeve 408 is threadedly connected to a threaded rod 409, one end of the threaded rod 409 is fixedly connected to a driving source 410 fixedly connected to the conduit 1, and one side of the surface of the pushing sleeve 408 is slidably plugged with a guide rod 411 corresponding to the threaded rod 409;

[0060] The pushing sleeve 408 is used to drive the corresponding elastic filter 401 and the supporting ring 404 to move;

[0061] The threaded rod 409 and the driving source 410 are used to drive the push sleeve 408 to slide on the catheter 1. The driving source can be a motor. In mechanical design, the motor is a common type of driving source, mainly used to convert electrical energy into mechanical energy, and drive the device to operate by controlling speed, rotation or transportation.

[0062] The guide rod 411 is used to guide the push sleeve 408;

[0063] Specifically, the flow rate and flow rate detection mechanism 3 detects the flow rate and flow rate of blood passing through the elastic filter 401. When the blood flow rate is too fast, the driving source 410 is started, and its output end drives the threaded rod 409 to rotate, so that the pushing sleeve 408 moves downward based on the threaded rod 409 and is guided by the guide rod 411. As a result, the pushing sleeve 408 drives the corresponding elastic filter 401, elastic ring 402, and support ring 404 to move downward, causing the elastic sleeve 412 to deform and extend, thereby increasing the volume of the buffer chamber and increasing the residence time of blood in the buffer chamber, thereby further controlling the blood flow rate.

[0064] The surfaces of several support rings 404 are fixedly connected in an annular array with pressure sensors 413 corresponding to the inner wall of the coronary artery. Two of the electric push rods 406 are rotatably connected to the catheter 1, and the other two electric push rods 406 are slidably connected to the catheter 1. The interior of the support ring 404 is provided with a sliding groove corresponding to the elastic ring 402;

[0065] The pressure sensor 413 is used to detect the pressure between the support ring 404 and the inside of the coronary artery;

[0066] Specifically, based on the deformation mechanism 5, the two elastic filters 401 and the elastic ring 402 are expanded inside the coronary artery, so that the support ring 404 and the pressure sensor 413 are in contact with the inner wall of the coronary artery, so that the elastic filter 401 filters the embolic substances in the coronary artery. Based on the pressure detected by the pressure sensor 413, the area of ​​the elastic filter 401 expanded by the deformation mechanism 5 is adjusted, so that the area of ​​the support ring 404 is changed synchronously, thereby making the support ring 404 fit more closely with the inner wall of the coronary artery while avoiding excessive support of the inner wall of the coronary artery by the support ring 404 and causing damage to the inner wall of the coronary artery.

[0067] Example 3, based on Example 1 and Example 2, further, the flow rate and velocity detection mechanism 3 includes a mounting cylinder 301 fixedly connected to the upper surface of the conduit 1, the interior of the mounting cylinder 301 is fixedly connected to the flow sensor 308 corresponding to the elastic filter 401 in an annular array, the interior of the mounting cylinder 301 is fixedly connected to the drive motor 302, the output end of the drive motor 302 is fixedly connected to the screw rod 303 rotatably connected to the mounting cylinder 301, and one end of the screw rod 303 is rotatably sleeved with a mounting plate 304 corresponding to the elastic filter 401;

[0068] The mounting cylinder 301 is used to support the flow sensor 308 and the drive motor 302;

[0069] The driving motor 302 and the screw rod 303 are used to drive the mounting plate 304 to move;

[0070] The flow sensor 308 is used to detect the flow of blood after it passes through the elastic filter 401;

[0071] The flow rate detection mechanism 3 also includes a fixing sleeve 305 fixedly connected to the upper surface of the mounting plate 304 by bolts. The fixing sleeve 305 is fixedly connected to the interior of the Doppler ultrasonic flow velocity sensor 306 corresponding to the interior of the coronary artery. The lower surface of the mounting plate 304 is fixedly connected to a connecting plate 307 fixedly connected to the elastic filter 401 in an annular array.

[0072] The mounting plate 304 is used to support the fixing sleeve 305 and the Doppler ultrasonic flow velocity sensor 306;

[0073] The fixing sleeve 305 is used to install the Doppler ultrasonic flow velocity sensor 306;

[0074] The Doppler ultrasonic flow velocity sensor 306 is used to detect the flow velocity of blood after it passes through the elastic filter 401;

[0075] The connecting plate 307 is used to pull one side of the elastic filter 401;

[0076] Specifically, when the coronary artery protection device is protecting the inside of the coronary artery, the blood flow through the elastic filter 401 is detected based on the flow sensor 308. When the flow rate decreases and exceeds a threshold, the bidirectional motor 407 is automatically driven to cause the elastic filter 401 to vibrate.

[0077] The Doppler ultrasonic flow velocity sensor 306 detects the blood flow velocity passing through the elastic filter 401. When the blood flow velocity is too fast, the driving source 410 is automatically activated, so that the pushing sleeve 408 pushes the corresponding elastic filter 401 to move, thereby adjusting the blood flow velocity.

[0078] When the blood flow through the elastic filter 401 decreases, the cam 405 drives the elastic ring 402 to squeeze the elastic member 403, and at the same time, the drive motor 302 is started, causing it to drive the fixing sleeve 305 and the Doppler ultrasonic flow velocity sensor 306 to slide on one end of the catheter 1, so that the mounting plate 304 moves synchronously, thereby causing the connecting plate 307 to pull one side of the elastic filter 401 to move, causing the elastic filter 401 to deform, thereby causing the filter pores of the elastic filter 401 to passively deform and increase, further accelerating the separation of embolic substances from the filter pores, and further preventing abnormal increase in blood flow pressure in the coronary artery;

[0079] The temperature control mechanism 2 includes a heating plate 201 fixedly connected to the inside of the conduit 1 and corresponding to the conduit 1. The interior of the heating plate 201 is fixedly connected to an electric heating plate 202 in a circular array. The surface of the conduit 1 is fixedly connected to temperature sensors 203 corresponding to the heating plate 201 in a path array.

[0080] The elastic filter 401 is made of nickel-titanium alloy. The electric heating plate 202 and the heating plate 201 are used to heat and control the temperature of the catheter 1 and the elastic filter 401. The surface of the support ring 404 is provided with an annular array of mounting grooves corresponding to the pressure sensor 413.

[0081] The elastic filter 401 is made of nickel-titanium alloy, which improves the heat conduction effect of the elastic filter 401, thereby making the electric heating plate 202 more efficient in heating the conduit 1 and the elastic filter 401.

[0082] The electric heating plate 202 is used to heat and keep warm the components of the coronary artery protection device;

[0083] The heating plate 201 is used to transfer heat to the catheter 1, and transfer the heat to the components of the coronary artery protection device through the catheter 1;

[0084] Specifically, when the catheter 1 and the elastic filter 401 are inserted into the coronary artery, the electric heating plate 202 is activated to heat the heating plate 201 and transfer the heat to components such as the elastic filter 401 and the elastic ring 402, thereby heating multiple components. Since the components are inserted into the coronary artery, the heat is prevented from dissipating, so that the temperature of the components in the coronary artery protection device is similar to the temperature inside the coronary artery, thereby preventing vasospasm of the coronary artery due to cold stimulation, causing coronary artery contraction and affecting the insertion of the coronary artery protection device and other operations performed on the coronary artery.

[0085] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A coronary artery protection device, characterized in that: It comprises a conduit (1), a temperature control mechanism (2) is installed inside the conduit (1), a flow rate and velocity detection mechanism (3) is installed at one end of the conduit (1), and a filtering mechanism (4) is installed on the surface of the conduit (1); The filtering mechanism (4) comprises an elastic filter screen (401) mounted on the surface of the conduit (1) in a path array, an elastic ring (402) being fixedly connected to the surface of the elastic filter screen (401), an elastic member (403) being fixedly connected to the surface of the elastic ring (402) in a ring array, a support ring (404) being slidably sleeved on the surface of the elastic ring (402) and corresponding to the elastic filter screen (401) being fixedly connected to the surfaces of the elastic members (403), cams (405) corresponding to the elastic members (403) being fitted on both sides of the lower surface of the elastic ring (402), an electric push rod (406) being fixedly connected to the surface of the cam (405), a bidirectional motor (407) fixedly connected to the inside of the conduit (1) being fixedly connected to the opposite sides of the two electric push rods (406), and a deformation mechanism (5) being mounted inside the elastic ring (402).

2. The coronary artery protection device according to claim 1, characterized in that: The filtering mechanism (4) further comprises a pushing sleeve (408) fixedly connected to the upper surface of one of the elastic filter screens (401) and slidably sleeved on the surface of the conduit (1); a threaded rod (409) is threadedly connected to the surface of the pushing sleeve (408); one end of the threaded rod (409) is fixedly connected to a driving source (410) fixedly connected to the conduit (1); and a guide rod (411) corresponding to the threaded rod (409) is slidably inserted on one side of the surface of the pushing sleeve (408).

3. The coronary artery protection device according to claim 1, characterized in that: The filtering mechanism (4) further comprises an elastic sleeve (412) which is fixedly connected to opposite sides of a plurality of elastic rings (402) and sleeved on the surface of the conduit (1), wherein one of the elastic filter screens (401) is fixedly connected to the conduit (1), and the other elastic filter screen (401) is slidably connected to the conduit (1).

4. The coronary artery protection device according to claim 1, characterized in that: The flow rate and velocity detection mechanism (3) comprises a mounting cylinder (301) fixedly connected to the upper surface of the conduit (1); a flow sensor (308) corresponding to the elastic filter (401) is fixedly connected to the interior of the mounting cylinder (301) in an annular array; a driving motor (302) is fixedly connected to the interior of the mounting cylinder (301); an output end of the driving motor (302) is fixedly connected to a screw rod (303) rotatably connected to the mounting cylinder (301); one end of the screw rod (303) is rotatably sleeved with a mounting plate (304) corresponding to the elastic filter (401).

5. The coronary artery protection device according to claim 4, characterized in that: The flow rate and velocity detection mechanism (3) further comprises a fixing sleeve (305) fixedly connected to the upper surface of the mounting plate (304) by means of bolts, the interior of the fixing sleeve (305) being fixedly connected to a Doppler ultrasonic flow velocity sensor (306) corresponding to the interior of the coronary artery, and the lower surface of the mounting plate (304) being fixedly connected to a connecting plate (307) fixedly connected to the elastic filter (401) in an annular array.

6. The coronary artery protection device according to claim 1, characterized in that: The temperature control mechanism (2) comprises a heating plate (201) fixedly connected to the inside of the conduit (1) and corresponding to the conduit (1); the inside of the heating plate (201) is fixedly connected to an electric heating plate (202) in a circular array; the surface of the conduit (1) is fixedly connected to a temperature sensor (203) corresponding to the heating plate (201) in a path array.

7. The coronary artery protection device according to claim 6, characterized in that: The surfaces of the plurality of support rings (404) are all fixedly connected in an annular array with pressure sensors (413) corresponding to the inner wall of the coronary artery, two of the electric push rods (406) are rotatably connected to the catheter (1), and the other two electric push rods (406) are slidably connected to the catheter (1), and a sliding groove corresponding to the elastic ring (402) is opened inside the support ring (404).

8. The coronary artery protection device according to claim 1, characterized in that: The deformation mechanism (5) comprises a flexible driving rod (501) fixedly connected to the inside of the catheter (1) and connected to an existing driving device, one end of the flexible driving rod (501) is mounted with a rotating ring (502) corresponding to the elastic ring (402), the surface of the rotating ring (502) is rotatably connected to a rotating rod (503) fixedly connected to the elastic ring (402), and the surface of the rotating rod (503) is rotatably connected to a rotating plate (504) rotatably connected to the rotating ring (502).

9. The coronary artery protection device according to claim 8, characterized in that: One of the rotating rings (502) is rotatably connected to the catheter (1), and the other rotating ring (502) is slidably connected to the catheter (1). One of the rotating rings (502) is fixedly connected to the flexible driving rod (501), and the other rotating ring (502) is slidably connected to the surface of the flexible driving rod (501). A sealing plug corresponding to the electric push rod (406) is fixedly connected to the surface of the catheter (1).

10. The coronary artery protection device according to claim 7, characterized in that: The elastic filter (401) is made of nickel-titanium alloy. The electric heating plate (202) and the heating plate (201) are used to heat and control the temperature of the catheter (1) and the elastic filter (401). The surface of the support ring (404) is provided with mounting grooves corresponding to the pressure sensor (413) in a circular array.

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