Gradient negative pressure thrombus suction and blood recovery residue prevention device

Abstract

The invention relates to the technical field of thrombus treatment, and discloses a gradient negative pressure thrombus suction and blood recovery residue prevention device which comprises a thrombus machine body, an adapter tube is fixedly arranged in the middle of a blood suction tube, an expansion net is fixedly arranged at the edge of one end of the adapter tube, and an insertion tube is fixedly arranged at one end of the expansion net. The connecting tube is pushed in the connecting hopper to drive the inserting tube to continuously move in the blood vessel of a patient, so that the expansion net is arranged at the rear end of a thrombus and abuts against one end of the connecting tube at the connecting hopper, and then after the steel wire rope is pulled, the inserting tube is pulled by the steel wire rope to move backwards; after the expansion net expands, the connecting pipe is pulled at the connecting hopper to drive the insertion pipe and the expansion net to move back and forth together, then the expansion net pushes the thrombus to move in the blood vessel together and be separated from an adhesive area, and the thrombus smoothly enters the blood drawing tube in cooperation with negative pressure suction.

Description

Technical Field

[0001] This invention belongs to the technical field of thrombosis treatment, and specifically relates to a gradient negative pressure thrombus aspiration and blood recovery device to prevent residue. Background Technology

[0002] Negative pressure thrombectomy (NPSH) is an interventional treatment method commonly used in the emergency management of acute ischemic stroke, myocardial infarction, or deep vein thrombosis. Its principle is to create a negative pressure environment at the site of the thrombus through a catheter, and then use mechanical devices to break up or aspirate the thrombus, restoring vascular patency. However, NPSH requires specialized thrombectomy equipment. With the development of modern medical technology, gradient thrombectomy equipment is frequently used, as it can not only aspirate the thrombus but also effectively recover any mixed blood during thrombus treatment. However, existing gradient thrombus aspiration and blood recovery equipment still has the following drawbacks during use: 1. Existing thrombosis machines adjust the negative pressure gradient according to the patient's thrombosis condition to aspirate blood clots. However, in some patients, the thrombus is too strongly adhered to the inner wall of the blood vessel. Excessive increase in negative pressure can damage the vascular endothelium and increase the patient's pain, which is not conducive to the safe aspiration of the thrombus. Ordinary thrombosis machines do not have physical assistance functions during the thrombus aspiration process, which affects the treatment effect of patients with severe thrombosis. 2. Existing thrombosis machines do not have the function of separating and collecting thrombi, blood clots and some blood that were brought out with them during the recovery and solidification process. This means that medical personnel need to use external screening tools to separate the two when analyzing the patient's blood components, which increases the workload and affects the efficiency of patient condition analysis. 3. After aspirating blood clots, conventional thrombosis machines require the use of test tubes to collect the recovered blood for later testing and analysis. However, when collecting blood using test tubes on existing thrombosis machines, medical staff need to manually lift the test tube and align it with the collection port. Furthermore, the blood clot extraction speed is relatively slow, and staff need to hold the test tube at the collection port for an extended period of time. Conventional thrombosis machines also lack a positioning and anti-dislodgement function for the test tube, thus reducing the ease of use of the device.

[0003] Therefore, it is necessary to invent a gradient negative pressure thrombus aspiration and blood recovery device to solve the above problems. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a gradient negative pressure thrombus aspiration and blood recovery device to prevent residue buildup, thereby resolving the issues raised in the background section.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a gradient negative pressure thrombus aspiration and blood recovery device for preventing residue, comprising a thrombus machine body, wherein a negative pressure aspiration mechanism, a blood recovery mechanism and a collection component are provided at the upper end of the thrombus machine body; The negative pressure aspiration mechanism includes an aspiration tube inserted into the top of the thrombosis machine body. A transfer tube is fixedly installed in the middle of the aspiration tube. A connecting bucket is inserted into one side of the transfer tube. An annular airbag is attached to one end of the aspiration tube. A connecting tube is inserted into the inner wall of one end of the aspiration tube. An expansion net is fixedly installed at the edge of one end of the connecting tube. An insertion tube is fixedly installed at one end of the expansion net. A steel wire is fixedly installed on one side of the inner wall of the insertion tube. The outer wall of one end of the connecting tube passes through the inner wall of the aspiration tube and the inner wall of the transfer tube and is inserted into one end of the connecting bucket. One end of the steel wire passes through the inner wall of one end of the connecting tube and is connected to a limit ball. A connecting tube is installed on one side of the top of the thrombosis machine body, and one end of the aspiration tube is inserted into the inner wall of the connecting tube. The upper end of the connecting pipe is respectively equipped with two support pipes, two conduits, a mounting base, and an air pump; Preferably, the two support tubes are respectively installed on the top of the thrombosis machine body, and one end of the two support tubes is respectively inserted and connected to both sides of the connecting tube. One end of the two catheters is respectively inserted and connected to one side of the two support tubes. The other end of the two catheters is respectively inserted and connected to both sides of the mounting base. The suction machine is installed on the inner wall of the mounting base, and a dustproof net is installed at one edge of the inner wall of the mounting base.

[0006] Preferably, the blood recovery mechanism includes a cannula installed on one side of the thrombolysis machine body, with a flexible tube inserted through the inner wall of the cannula, and a blood guide cover connected to one end of the flexible tube.

[0007] Preferably, a first limiting platform is fixedly provided on one side of the thrombosis machine body below the insertion tube. A collection groove is provided at the middle position of the top of the first limiting platform. A pad is inserted and connected to the upper edge of the inner wall of the collection groove. Multiple leakage holes are provided at equal intervals on the top of the pad. A sealing ring is fitted on the outer edge of the blood guiding cover.

[0008] Preferably, a groove is provided at the lower edge of the connecting tube on the top of the thrombosis machine body, and a blood guiding groove is provided on the inner wall of one end of the thrombosis machine body, and the inner walls of the two ends of the blood guiding groove are respectively connected to the inner wall of the insertion tube and the inner wall of the groove.

[0009] Preferably, the collection component includes a second limiting platform fixedly installed on one side of the thrombosis machine body below the first limiting platform. The top of the second limiting platform is provided with a first mounting groove, and both sides of the inner wall of the first mounting groove are provided with limiting grooves.

[0010] Preferably, a support frame is slidably connected between the inner walls of the two limiting grooves, a spring is fixedly provided on one side of the bottom of the inner wall of the first mounting groove, and one end of the spring is fixedly connected to one side of the bottom of the support frame, and a test tube positioning groove is provided on one side of the top of the support frame.

[0011] Preferably, a second mounting groove is provided at the middle position of the bottom of the first limiting platform, and a needle tube is inserted and connected to the top of the inner wall of the second mounting groove, and the inner wall of one end of the needle tube is connected to the inner wall of the collection groove.

[0012] Preferably, a blood test tube is installed between the inner walls of the first mounting groove and the second mounting groove, and the top of the blood test tube is inserted into the inner wall of the test tube positioning groove. The other end of the needle is inserted into the upper end of the inner wall of the blood test tube. A thrombus backflow purifier is installed at the upper end of the first limiting platform.

[0013] Preferably, a control panel is installed on the other side of the top of the thrombosis machine body, and the air pump and the thrombosis backflow purifier are both electrically connected to an external power source through the control panel.

[0014] The technical effects and advantages of this invention are as follows: 1. This invention features a negative pressure extraction mechanism. The insertion tube is inserted into the patient's blood vessel. With the insertion tube at the front, the extraction tube at the rear enters the vessel simultaneously. For patients with severe thrombosis, where excessive negative pressure cannot be applied, the adapter tube can be held and pushed within the connecting bucket to move the insertion tube through the thrombus region. The expansion mesh is positioned at the rear of the thrombus; at this point, the mesh is not inflated and its shape matches that of the insertion tube. One end of the connecting tube is held against the connecting bucket, and then the steel cable is pulled. The insertion tube moves backward under the pull of the steel wire cable, which in turn squeezes the expansion mesh in the middle with the connecting tube, causing it to expand and deform. After the expansion mesh expands, it pulls the connecting tube at the connecting bucket, which in turn moves the insertion tube and the expansion mesh back together. The expansion mesh then pushes the thrombus to move together in the blood vessel, thus detaching it from the adhesion area. With the help of negative pressure suction, the thrombus can be smoothly drawn into the suction tube for aspiration and collection. This solves the problem in the existing technology that patients with severe thrombosis cannot increase the negative pressure too much for thrombus aspiration, thus improving the treatment effect of severe thrombosis. 2. This invention, by setting up a blood recovery mechanism, uses a negative pressure extraction mechanism to extract thrombi and a portion of blood together. After extraction, the blood is guided into a cannula through the main body of the thrombus machine, and then through a tubing and a blood guide cover to enter the collection tank at the top of the first limiting platform. A pad is installed on the inner wall of the collection tank, with multiple holes at its upper end. Blood is screened into the collection tank for collection. Due to its size and viscosity, the thrombus and blood clots are intercepted at the top of the pad. Later, the blood guide cover can be pulled out directly in the collection tank to remove the pad and collect the thrombus and blood clots at its upper end. This achieves automatic screening between blood and thrombi. Later, the laboratory analysts do not need to use external equipment for screening, reducing the workload of staff and improving the efficiency of patient testing and analysis. 3. This invention, by setting up a collection component, allows the blood tube to be secured on the support frame at the top of the second limiting platform during blood collection. By squeezing the support frame, the spring at its bottom is compressed. After the tube is released, the elasticity of the spring causes the blood tube to be squeezed upwards, thereby pressing the tube opening into the second mounting groove at the bottom of the first limiting platform. This achieves positioning and reinforcement of the blood tube. When collecting blood, no manual support from staff is required, and the elastic reinforcement of the spring ensures that the collection opening fits tightly against the blood collection end, preventing the tube from falling off and preventing blood leakage, thus improving the convenience of using the device.

[0015] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description, claims and drawings. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the entire invention; Figure 2 This is a schematic diagram of the connection between the blood collection tube and the insertion tube in this invention; Figure 3 This is an appendix to the specification of this invention. Figure 2 An enlarged schematic diagram of point A in the middle; Figure 4 This is a schematic diagram of the negative pressure suction of the present invention; Figure 5 This is a schematic diagram of the top of the main body of the thrombosis machine of the present invention; Figure 6 This is an appendix to the specification of this invention. Figure 5 An enlarged diagram of point B in the middle; Figure 7 This is an appendix to the specification of this invention. Figure 4 An enlarged schematic diagram at point C; Figure 8 This is a schematic diagram of the interior of the main body of the thrombosis machine of the present invention; Figure 9 This is a schematic diagram of the bottom of the main body of the thrombosis machine of the present invention; Figure 10 This is an appendix to the specification of this invention. Figure 9 A magnified diagram of point D in the middle.

[0018] In the diagram: 1. Thrombosis machine main body; 2. Negative pressure aspiration mechanism; 201. Aspiration tube; 202. Transfer tube; 203. Connecting bucket; 204. Circular airbag; 205. Connecting tube; 206. Expansion net; 207. Insertion tube; 208. Steel wire cable; 209. Limiting ball; 210. Connecting tube; 211. Support tube; 212. Catheter; 213. Mounting base; 214. Aspirator; 215. Dustproof net; 3. Blood recovery mechanism; 301. Insertion tube; 302. Flexible tube 303. Blood guiding cover; 304. First limiting platform; 305. Collection groove; 306. Pad; 307. Leakage hole; 308. Sealing ring; 4. Groove; 5. Blood guiding groove; 6. Collection assembly; 601. Second limiting platform; 602. First mounting groove; 603. Limiting slide groove; 604. Support frame; 605. Spring; 606. Test tube positioning groove; 607. Second mounting groove; 608. Needle; 7. Blood test tube; 8. Control panel; 9. Thrombus backflow purifier. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] This invention provides, for example Figure 1-10 The gradient negative pressure thrombus aspiration and blood recovery device shown includes a thrombus machine body 1, a negative pressure aspiration mechanism 2, a blood recovery mechanism 3 and a collection component 6 arranged at the upper end of the thrombus machine body 1; The negative pressure aspiration mechanism 2 includes an aspiration tube 201 inserted into the top of the thrombolysis machine body 1. A transfer tube 202 is fixedly installed in the middle of the aspiration tube 201. A connecting bucket 203 is inserted into one side of the transfer tube 202. An annular airbag 204 is attached to one end of the aspiration tube 201. A connecting tube 205 is inserted into the inner wall of one end of the aspiration tube 201. An expansion mesh 206 is fixedly installed at the edge of one end of the connecting tube 205. An insertion tube 207 is fixedly installed at one end of the expansion mesh 206. A [missing information - likely a device or component] is fixedly installed on one side of the inner wall of the insertion tube 207. There is a steel wire cable 208. The outer wall of one end of the connecting tube 205 passes through the inner wall of the suction tube 201 and the inner wall of the transfer tube 202 and is inserted and connected to one end of the connecting bucket 203. One end of the steel wire cable 208 passes through the inner wall of one end of the connecting tube 205 and is connected to a limiting ball 209. A connecting tube 210 is installed on one side of the top of the thrombosis machine body 1. One end of the suction tube 201 is inserted and connected to the inner wall of the connecting tube 210. The limiting ball 209 is limited at the end of the connecting tube 205 to prevent the steel wire cable 208 from slipping into it and being difficult to pull out. The upper end of the connecting pipe 210 is equipped with two support pipes 211, two conduits 212, a mounting base 213, and an air extractor 214.

[0021] Two support tubes 211 are respectively installed on the top of the thrombus machine body 1, and one end of each support tube 211 is inserted and connected to both sides of the connecting tube 210. One end of each conduit 212 is inserted and connected to one side of each support tube 211, and the other end of each conduit 212 is inserted and connected to both sides of the mounting base 213. The suction machine 214 is installed on the inner wall of the mounting base 213. A dustproof net 215 is installed on one edge of the inner wall of the mounting base 213. When the negative pressure is adjusted in a gradient manner, the operating intensity of the suction machine 214 is adjusted on the control panel 8 to create negative pressure in the mounting base 213. The mounting base 213 is connected to the support tube 211 through the conduit 212. The support tube 211 is connected to the connecting tube 210, thereby creating negative pressure in the connecting tube 210, so as to achieve the purpose of the suction tube 201 entering the patient's blood vessel to aspirate the thrombus. In use, the suction tube 201 is inserted into the connecting tube 210, connecting the insertion end of the thrombosis machine to the main body 1. The insertion tube 207 is then inserted into the patient's blood vessel, with the insertion tube 207 inserted at the front end. The suction tube 201 at the rear end then enters the patient's blood vessel simultaneously. The end of the suction tube 201 is equipped with a ring-shaped airbag 204, which can press against the inner wall of the patient's blood vessel for gentle contact, thus widening the blood vessel diameter while reducing patient discomfort. The suction machine 214 inside the mounting base 213 is activated. The negative pressure intensity is adjusted by regulating the working intensity of the suction machine 214 on the control panel 8, allowing for thrombus aspiration in patients with different conditions. When dealing with a patient with severe thrombosis and when excessive negative pressure cannot be applied, medical staff hold the adapter tube 202 and push the connecting tube 205 through the connecting bucket 203. This pushes the insertion tube 207 to continue moving through the patient's blood vessel, passing through the thrombus area, so that the expansion mesh 206 is positioned at the rear end of the thrombus. At this point, the expansion mesh 206 is not inflated, and its shape matches that of the insertion tube 207. It is held against one end of the connecting tube 205 at the connecting bucket 203. Then, the steel wire cable 208 is pulled, causing the insertion tube 207 to move backward under the pull of the steel wire cable 208. This, in turn, works with the connecting tube 205 to compress the expansion mesh 206 in the middle, causing it to expand and deform. The specific expansion state is shown in the attached instruction manual. Figure 3 As shown, after the expansion net 206 expands, the connecting tube 205 is pulled at the connecting bucket 203, which in turn moves the insertion tube 207 and the expansion net 206 back together. The expansion net 206 then pushes the thrombus to move in the blood vessel and detach it from the adhesion area. With the help of negative pressure suction, the thrombus can be smoothly drawn into the suction tube 201 for suction and collection. This solves the problem in the existing technology that patients with severe thrombosis cannot increase the negative pressure too much for thrombus suction, thus improving the treatment effect of severe thrombosis. Furthermore, the blood recovery mechanism 3 includes a cannula 301 installed on one side of the thrombus machine body 1. A flexible tube 302 is inserted and connected to the inner wall of the cannula 301. One end of the flexible tube 302 is connected to a blood guiding cover 303. The cannula 301 is connected to the blood guiding cover 303 through the flexible tube 302, and the three are in a connected state.

[0022] A first limiting platform 304 is fixedly installed on one side of the thrombolysis machine body 1 below the insertion cannula 301. A collection groove 305 is opened at the middle of the top of the first limiting platform 304. A pad 306 is inserted and connected to the upper edge of the inner wall of the collection groove 305. Multiple leakage holes 307 are evenly spaced on the top of the pad 306. A sealing ring 308 is fitted on the outer edge of the blood guiding cover 303. After the negative pressure extraction mechanism 2 extracts the thrombus and some blood together, it will be introduced into the insertion cannula 301 through the thrombolysis machine body 1, and then enter the top of the first limiting platform 304 through the tubing 302 and the blood guiding cover 303. In the collection tank 305, a pad 306 is installed on the inner wall of the collection tank 305. Multiple holes 307 are opened at the upper end of the pad 306. Blood is screened into the collection tank 305 for collection. Due to its size and viscosity, the blood clots are intercepted at the top of the pad 306. Later, the pad 306 can be removed by pulling out the blood guide cover 303 in the collection tank 305 to collect the blood clots at the top. This realizes automatic screening between blood and blood clots. Later, the test analysts do not need to use external equipment for screening, which reduces the workload of the staff and improves the efficiency of patient test analysis. Furthermore, a groove 4 is provided at the lower edge of the connecting tube 210 at the top of the thrombus machine body 1, and a blood guiding groove 5 is provided on the inner wall of one end of the thrombus machine body 1. The inner walls of the two ends of the blood guiding groove 5 are respectively connected to the inner wall of the insertion tube 301 and the inner wall of the groove 4. After the negative pressure extraction mechanism 2 draws out the thrombus and some blood, it enters the groove 4 through the connecting tube 210. After accumulating in the groove 4, it flows into the blood guiding groove 5 below, and then enters the insertion tube 301 through the blood guiding groove 5 and is recovered by the blood recovery mechanism 3. Furthermore, the collection component 6 includes a second limiting platform 601 fixedly installed on one side of the thrombosis machine body 1 below the first limiting platform 304. The top of the second limiting platform 601 is provided with a first mounting groove 602, and both sides of the inner wall of the first mounting groove 602 are provided with limiting sliding grooves 603. The second limiting platform 601 is set at the bottom of the first limiting platform 304 mainly to lock the blood tube 7, so as to facilitate the positioning of the blood tube 7.

[0023] A support frame 604 is slidably connected between the inner walls of the two limiting grooves 603. A spring 605 is fixedly installed on one side of the bottom of the inner wall of the first mounting groove 602, and one end of the spring 605 is fixedly connected to one side of the bottom of the support frame 604. A test tube positioning groove 606 is opened on one side of the top of the support frame 604. When collecting blood, the blood test tube 7 is stuck on the support frame 604 at the top of the second limiting platform 601. By squeezing the support frame 604, the spring 605 at its bottom is compressed. After the test tube is released, the blood test tube 7 is squeezed upward under the elastic action of the spring 605, thereby squeezing the test tube opening into the second mounting groove 607 at the bottom of the first limiting platform 304, realizing the positioning and reinforcement of the blood test tube 7. When collecting blood, there is no need for manual support by the staff. And through the elastic reinforcement of the spring 605, the collection opening is tightly attached to the blood collection end, which will not cause the test tube to fall off, nor will it cause blood leakage, thus improving the convenience of using the device. Furthermore, a second mounting groove 607 is provided at the middle position of the bottom of the first limiting platform 304. A needle 608 is inserted and connected to the top of the inner wall of the second mounting groove 607, and the inner wall of one end of the needle 608 is connected to the inner wall of the collection groove 305. After the collection component 6 positions the blood test tube 7, the needle 608 in the second mounting groove 607 is inserted into the test tube opening to introduce the blood collected by the blood recovery mechanism 3 into the blood test tube 7 for collection. This, together with the pad 306 above, achieves the separation of blood clots from blood.

[0024] A blood test tube 7 is installed between the inner walls of the first mounting slot 602 and the second mounting slot 607, with the top of the blood test tube 7 inserted into the inner wall of the test tube positioning slot 606. The other end of the needle tube 608 is inserted into the upper end of the inner wall of the blood test tube 7. A thrombus backflow purifier 9 is installed on the upper end of the first limiting platform 304. The specific structure and position of the thrombus backflow purifier 9 installed on the first limiting platform 304 are shown in the attached instruction manual. Figure 1 , 4 As shown in Figure 5, when pathological examination of the patient's thrombus blood is not required, the blood tube 7 does not need to be installed on the collection component 6. The blood can be directly connected to the end of the thrombus backflow purifier 9 using a medical catheter, and the purified and filtered clean blood can be returned to the patient's body, reducing the patient's blood loss. If pathological examination of the patient's blood is required, the blood and thrombus clots can be separated, filtered, and collected according to the above collection steps, which is convenient for subsequent testing and analysis. During the operation of the collection component 6, the separated blood flows through the inside of the thrombus backflow purifier 9 and is discharged from the needle tube 608 for collection. When it is necessary to return the blood to the patient's body, the thrombus backflow purifier 9 is activated, sealing the area above the needle tube 608. After the blood is purified by the purifier, it is discharged from its end and introduced into the patient's body through the medical catheter.

[0025] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A gradient negative pressure thrombus aspiration and blood recovery device to prevent residue, comprising a thrombus machine body (1), characterized in that: The upper end of the thrombosis machine body (1) is provided with a negative pressure extraction mechanism (2), a blood recovery mechanism (3) and a collection component (6). The negative pressure aspiration mechanism (2) includes an aspiration tube (201) inserted into the top of the thrombectomy machine body (1). A transfer tube (202) is fixedly provided in the middle of the aspiration tube (201). A connecting bucket (203) is inserted into one side of the transfer tube (202). An annular airbag (204) is attached to one end of the aspiration tube (201). A connecting tube (205) is inserted into the inner wall of one end of the aspiration tube (201). An expansion net (206) is fixedly provided at the edge of one end of the connecting tube (205). One end of the expansion net (206) is fixedly provided with... An insertion tube (207) is provided, and a steel wire rope (208) is fixedly provided on one side of the inner wall of the insertion tube (207). The outer wall of one end of the connecting tube (205) passes through the inner wall of the suction tube (201) and the inner wall of the transfer tube (202) and is inserted and connected to one end of the connecting bucket (203). One end of the steel wire rope (208) passes through the inner wall of one end of the connecting tube (205) and is connected to a limiting ball (209). A connecting tube (210) is installed on one side of the top of the thrombosis machine body (1), and one end of the suction tube (201) is inserted and connected to the inner wall of the connecting tube (210). The upper end of the connecting pipe (210) is respectively equipped with two support pipes (211), two conduits (212), a mounting base (213) and an air pump (214).

2. The gradient negative pressure thrombus aspiration and blood recovery device for preventing residue loss according to claim 1, characterized in that: Two support tubes (211) are respectively installed on the top of the thrombosis machine body (1), and one end of the two support tubes (211) is respectively inserted and connected to both sides of the connecting tube (210). One end of the two catheters (212) is respectively inserted and connected to one side of the two support tubes (211), and the other end of the two catheters (212) is respectively inserted and connected to both sides of the mounting base (213). The suction machine (214) is installed on the inner wall of the mounting base (213), and a dustproof net (215) is installed on one edge of the inner wall of the mounting base (213).

3. The gradient negative pressure thrombus aspiration and blood recovery device for preventing residue loss according to claim 1, characterized in that: The blood recovery mechanism (3) includes a cannula (301) installed on one side of the thrombus machine body (1), and a flexible tube (302) is inserted through the inner wall of the cannula (301). One end of the flexible tube (302) is connected to a blood guide cover (303).

4. The gradient negative pressure thrombus aspiration and blood recovery device for preventing residue as described in claim 3, characterized in that: The main body (1) of the thrombosis machine is fixedly provided with a first limiting platform (304) below the cannula (301) on one side. A collection groove (305) is provided at the middle position of the top of the first limiting platform (304). A pad (306) is inserted and connected at the upper edge of the inner wall of the collection groove (305). Multiple leakage holes (307) are provided at equal intervals on the top of the pad (306). A sealing ring (308) is fitted at the outer edge of the blood guiding cover (303).

5. The gradient negative pressure thrombus aspiration and blood recovery device for preventing residue as described in claim 1, characterized in that: The top of the thrombosis machine body (1) is provided with a groove (4) at the lower edge of the connecting tube (210). A blood guiding groove (5) is provided on the inner wall of one end of the thrombosis machine body (1), and the inner walls of both ends of the blood guiding groove (5) are respectively connected to the inner wall of the insertion tube (301) and the inner wall of the groove (4).

6. The gradient negative pressure thrombus aspiration and blood recovery device for preventing residue loss according to claim 1, characterized in that: The collection component (6) includes a second limiting platform (601) fixedly installed on one side of the thrombosis machine body (1) below the first limiting platform (304). The top of the second limiting platform (601) is provided with a first mounting groove (602), and both sides of the inner wall of the first mounting groove (602) are provided with limiting sliding grooves (603).

7. The gradient negative pressure thrombus aspiration and blood recovery device for preventing residue as described in claim 6, characterized in that: A support frame (604) is slidably connected between the inner walls of the two limiting grooves (603). A spring (605) is fixedly provided on one side of the bottom of the inner wall of the first mounting groove (602), and one end of the spring (605) is fixedly connected to one side of the bottom of the support frame (604). A test tube positioning groove (606) is provided on one side of the top of the support frame (604).

8. The gradient negative pressure thrombus aspiration and blood recovery device for preventing residue as described in claim 7, characterized in that: A second mounting groove (607) is provided at the middle position of the bottom of the first limiting platform (304). A needle tube (608) is inserted and connected to the top of the inner wall of the second mounting groove (607), and the inner wall of one end of the needle tube (608) is connected to the inner wall of the collection groove (305).

9. The gradient negative pressure thrombus aspiration and blood recovery device for preventing residue as described in claim 8, characterized in that: A blood test tube (7) is installed between the inner walls of the first mounting groove (602) and the second mounting groove (607), and the top of the blood test tube (7) is inserted into the inner wall of the test tube positioning groove (606). The other end of the needle tube (608) is inserted into the upper end of the inner wall of the blood test tube (7). A thrombus backflow purifier (9) is installed at the upper end of the first limiting platform (304).

10. The gradient negative pressure thrombus aspiration and blood recovery device for preventing residue loss according to claim 1, characterized in that: A control panel (8) is installed on the other side of the top of the thrombosis machine body (1). The air pump (214) and the thrombosis backflow purifier (9) are both electrically connected to an external power source through the control panel (8).

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