Instrument for negative pressure extraction and filtration of thrombus of artery

Abstract

The utility model discloses an instrument for negative pressure extraction and filtration of thrombus of an artery. Comprising a sheathing canal, a blocking balloon, a blood collection bag, a pipeline and a negative pressure providing structure, the blocking balloon is arranged on the outer side of the thrombus treatment sheathing canal, then the blood collection bag is connected to the outer side of the sheathing canal through the pipeline, the sheathing canal is connected with the blood collection bag through the pipeline, and a thrombus filter screen is arranged in the pipeline; a negative pressure providing structure is further arranged, the negative pressure providing structure is a structure with a cavity which is arranged on the outer side of the blood collection bag and used for constructing negative pressure by extracting gas in the blood collection bag, power is provided through the negative pressure to lead blood in the arterial blood vessel out into the blood collection bag, and thrombus is blocked at the position of the filter screen after the blood passes through the thrombus filter screen. The filtered safe blood flows into the blood collecting bag, the blood in the blood collecting bag can be transfused back to the patient again in a transfusing mode, and the blood in the blood collecting bag can also provide a blood source for substances for extracting platelet rich plasma (PRP) therapy.

Description

Technical Field

[0001] The utility model belongs to the technical field of devices for thrombus aspiration and filtration and proximal artery protection from distal embolism, and particularly relates to the field of devices for filtering arterial plaque debris and thrombus, specifically a device for negative pressure extraction and thrombus filtering in arteries. Background Art

[0002] For lower limb ischemic diseases, interventional treatment of lower limb arteries is the main treatment method, including balloon dilatation, thrombus aspiration, plaque volume reduction, etc. However, embolic events caused by the detachment of plaques and thrombi during the treatment process cannot be avoided, and sometimes lead to serious consequences. Therefore, in some high-risk situations, it is necessary to implant a thrombus filter before treatment, such as the CN100409818C recyclable thrombus temporary filter. After the thrombus site is treated, the thrombus is blocked by the thrombus filter, and the thrombus is blocked in the thrombus filter, which can effectively avoid the thrombus entering the distal end of the artery and causing the risk of embolism in the distal artery.

[0003] However, this method requires the additional implantation of a thrombus filter, which not only significantly increases the cost but also increases the complexity of the interventional operation. For example, only a dedicated guide wire can be used, resulting in insufficient support and the filter cannot be recovered. The entire process is time-consuming and difficult to operate.

[0004] Therefore, there is a need for a protective device that can effectively block plaques or thrombi so that blood clots and thrombi do not rush to the distal arteries with the blood flow. At the same time, it has the function of collecting blood so that the collected blood can be returned to the patient to prevent the patient from losing blood. Utility Model Content

[0005] In response to the above problems, the present application discloses a device for negative pressure extraction and filtration of thrombi in arteries; the present application sets a blocking balloon on the outside of a thrombus treatment sheath, and then connects a blood collection bag to the outside of the sheath, the sheath and the blood collection bag are connected by a pipeline, and a thrombus filter is set in the pipeline; a negative pressure providing structure is also provided to provide a power to draw blood in the artery into the blood collection bag, and the blood can block the thrombus at the filter position after passing through the thrombus filter, so that the blood passing through the thrombus filter is safe blood; when the amount of blood in the blood collection bag is large enough, the blood collection bag can be replaced, and then the blood can be returned to the patient by transfusion. Because it is a treatment for arterial thrombi, only a negative pressure providing structure is needed to provide a small negative pressure attraction force to draw arterial blood into the blood collection bag. The above concept removes blood from the body, filters it using negative pressure in an external filtration structure, and then drains the blood into a blood collection bag. This approach allows for the treatment of arterial thrombosis while reducing the need for thrombus filters. Furthermore, since the blood is returned to the collection bag, there is no loss of blood from the patient. After filtration, it can be returned to the patient, making the entire process simple and convenient. Platelet-rich plasma (PRP) therapy is a regenerative medicine technique that uses a patient's own blood to extract high-concentration platelets, which are then injected locally to promote tissue repair. Its core principle is to accelerate tissue healing through the growth factors released by platelets. With the development of PRP therapy, it has also been applied to prevent arterial embolism during interventional procedures. The collected blood can not only be returned to the patient but also provide the autologous blood source for the therapeutic substances in the PRP therapy. The extracted growth factors can then be used to treat arterial embolism, achieving the dual benefits of interventional and biological therapy.

[0006] The specific technical solution is: an instrument for negative pressure extraction and filtration of thrombus in arteries, which includes a sheath, a blocking balloon, an inflation tube of the blocking balloon, a blood return tube, a blood collection bag and a negative pressure providing structure.

[0007] Among them, the first end of the sheath is the end set in the body when in use, and the opposite end is the second end. The second end of the sheath is provided with an operating port for delivering plaque excision tools, expanding balloons or expanding stents, etc.; the first end of the sheath is provided with an opening for operating the entry and exit of instruments and the outflow of blood.

[0008] The blocking balloon is arranged at the first end of the sheath tube, and blocks the balloon from entering the body in a non-inflated state, and adheres to the blood vessel wall to block blood flow in an inflated state.

[0009] The inflating tube of the blocking balloon is arranged along the longitudinal axis of the sheath and close to the sheath. The first end of the inflating tube extends into the blocking balloon, and the second end of the inflating tube is separated from the second end of the sheath and extends away from the sheath. The second end of the inflating tube is used to connect the inflating structure.

[0010] The first end of the blood return tube is directly connected to the sheath tube, or a connecting tube is set at the second end of the sheath tube, and the blood return tube is connected to the connecting tube. A thrombus filter is set in the blood return tube or the connecting tube.

[0011] A blood collection bag connected to a blood return tube is used to collect blood.

[0012] The negative pressure providing structure is used to provide negative pressure for drawing blood into the blood collection bag; the negative pressure providing structure is a cavity structure arranged on the outside of the blood collection bag. After the cavity structure is vacuumed, it provides negative pressure to the blood collection bag, and then provides a negative pressure suction force to the pipeline.

[0013] Furthermore, the distance between the blocking balloon and the first end of the sheath is less than 2 cm.

[0014] Furthermore, a blood inlet is provided in the sheath region between the blocking balloon and the first end of the sheath. This arrangement can prevent thrombus from being stuck between the blocking balloon and the sheath, so that all thrombus can be drawn out.

[0015] Furthermore, the inflation tube of the blocking balloon is attached to the outside of the sheath tube. This arrangement simplifies the difficulty of setting the inflation tube, and because the diameter of the inflation tube is much smaller than that of the sheath tube, its arrangement on the outside will not interfere with the surgical operation.

[0016] Technical Effects

[0017] The combination of the blocking balloon and sheath can effectively block blood flow to the severed finger. The operation port is used for operation, and the blood collection bag and negative pressure structure ensure that the thrombus generated by the operation is drawn out to the blood collection bag by the force of negative pressure. Furthermore, because the blood return tube is equipped with a thrombus filter, the blood in the blood collection bag is safe and free of thrombus, and can be reinfused into the human body to avoid the risk of anemia in the patient. It can also provide an autologous blood source for platelet-rich plasma (PRP) therapy, ensuring the effective implementation of interventional combined with biological therapy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the negative pressure providing structure of the utility model as a negative pressure cabin;

[0019] Figure 2 This is a schematic diagram of the structure of the sheath and blocking balloon of the utility model;

[0020] Figure 3 This is a partially enlarged cross-sectional structural diagram of the second end of the sheath tube of the utility model;

[0021] Figure 4 Schematic diagram of the cross-sectional structure of a blood return tube with a thrombus filter and a one-way valve;

[0022] Figure 5 It is a structural diagram of the negative pressure cabin changing from a non-negative pressure state to a negative pressure state;

[0023] Figure 6 It is a schematic diagram of the cross-sectional structure of the exhaust pipe or the vacuum pipe;

[0024] Figure 7 A partially enlarged cross-sectional view of a section of the blood return tube to effectively illustrate the structure of the thrombus filter;

[0025] Description of main reference numerals

[0026] 1. Sheath; 11. Operation port; 12. Sealing membrane; 13. Opening; 14. Blood inlet port; 15. Connecting tube; 2. Blocking balloon; 3. Inflation tube; 4. Blood return tube; 5. Blood collection bag; 611. One-way valve 1; 612. One-way valve 2; 613. Ventilation switch; 62. Negative pressure chamber; 621. Vacuum tube; 622. Connecting rope; 7. Thrombus filter. DETAILED DESCRIPTION

[0027] To make the purpose, technical solutions, and advantages of this application more clear, the following will provide a clear and complete description of the technical solutions of this application in conjunction with the specific embodiments of this application and the corresponding drawings. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0028] To simplify the drawings, only the parts related to the present application are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, to simplify the drawings and facilitate understanding, in some figures, only one of the components with the same structure or function is schematically shown or labeled.

[0029] In this document, unless otherwise specified or limited, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance. Unless otherwise specified or explained, the term "plurality" refers to two or more. The terms "connected" and "fixed" should be understood broadly. For example, "connected" can mean a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0030] A device for negative pressure extraction and filtration of thrombus in arteries comprises a sheath 1, a blocking balloon 2, an inflation tube 3 of the blocking balloon 2, a blood return tube 4, a blood collection bag 5 and a negative pressure providing structure.

[0031] refer to Figure 1-4 The first end of the sheath 1 is the end that is set in the body when in use, and the opposite end is the second end. The second end of the sheath 1 is provided with an operating port 11 for conveying operating instruments. The operating instruments can be various tools for operating the entry and exit of vascular plaques, such as plaque peeling tools, expansion balloons or expansion stents; the first end of the sheath 1 is provided with an opening 13 for the entry and exit of operating instruments and the outflow of blood. A sealing membrane 12 is provided in the sheath 1 near the operating port 11 to prevent blood from leaking after the operating instrument enters. The blocking balloon 2 is provided at the first end of the sheath 1 to prevent the balloon from entering the body in a non-inflated state, and to cling to the blood vessel wall to block blood flow in an inflated state. The inflation tube 3 of the blocking balloon 2 is arranged along the longitudinal axis of the sheath 1 and clings to the sheath 1. The first end of the inflation tube 3 extends into the blocking balloon 2, and the second end of the inflation tube 3 separates from the second end of the sheath 1 and extends away from the sheath 1. The second end of the inflation tube 3 is used to connect the inflation structure. The first end of the blood return tube 4 is directly connected to the sheath tube 1, or a connecting tube 15 is provided at the second end of the sheath tube 1, and the blood return tube 4 is connected to the connecting tube 15. A thrombus filter 7 is provided in the blood return tube 4. When it is required to explain the specific implementation, the thrombus filter 7 can also be provided in the connecting tube 15. The blood collection bag 5 is connected to the blood return tube 4 for collecting blood. The negative pressure providing structure is a cavity structure provided on the outside of the blood collection bag 5. After the cavity structure is evacuated, negative pressure is provided to the blood collection bag 5, thereby providing a negative pressure suction force to the pipeline. A one-way valve 611 is provided in a section of the blood return tube 4 close to the sheath tube 1 to prevent blood from flowing back into the human body.

[0032] refer to Figure 1 、 Figure 5 and Figure 6; When the negative pressure providing structure is a cavity structure on the outside of the blood collecting bag 5, the cavity structure is a negative pressure cabin 62 that completely surrounds the outside of the blood collecting bag 5. The negative pressure cabin 62 is a hard structure. Connecting structures extend from both sides of the middle of the negative pressure cabin 62 and are connected to the middle of the blood collecting bag 5. A vacuum tube 621 extends from the negative pressure cabin 62. A one-way valve 612 that allows air to escape is provided on the vacuum tube 621, and a ventilation switch 613 that can be opened to allow air to enter is provided on the vacuum tube 621 on the side of the vacuum tube 621 that is close to the negative pressure cabin 62 relative to the one-way valve 612. In this way, the other blood in the negative pressure chamber 62 is drawn out through a vacuum syringe or other structure, and negative pressure is formed in the negative pressure chamber 62, which will cause the blood collection bag 5 to move closer to the wall of the negative pressure chamber 62 under the action of uniform negative pressure, thereby causing the blood collection bag 5 to deform, forming negative pressure in the blood collection bag 5, and causing blood to continuously enter the blood collection bag 5. After the blood collection is completed, the negative pressure is eliminated by opening the ventilation switch 613, and the suction of arterial blood is ended. The two bag surfaces of the blood collecting bag 5 are positioned as the front and back, and the corresponding negative pressure cabin 62 also corresponds to the front and back walls that are consistent with the front and back. The space between the front and rear walls of the negative pressure cabin 62 and the front and back of the blood collecting bag 5 is a vacuumable space. In order to ensure that after vacuuming, the blood collecting bag 5 generates a negative pressure for blood drawing after the front and back are separated from each other, a two-section connecting structure is set to connect the front and rear walls of the negative pressure cabin 62 and the front and back of the blood collecting bag 5. The connecting structure is a connecting rope 622, and the connecting rope 622 is an inelastic rope; when negative pressure is not drawn, the connecting rope 622 is in a straight rope state, and when negative pressure is drawn, the connecting rope 622 is in a bent state. Through the above arrangement, it can be ensured that after negative pressure is drawn, the front and back of the blood collecting bag 5 are separated to generate negative pressure for blood drawing.

[0033] During use, the sheath 1 is first sent from the distal end of the blood vessel where the plaque exists to the surgical area, and then the blood collection bag 5, the blood return tube 4 and the negative pressure providing structure are all set outside the body. Then, the operating instrument, such as the plaque rotary cutting tool, the balloon for expansion or the stent for expansion is sent to the surgical area. No operation is performed first, and then the blocking balloon 2 is inflated by the inflation structure, so that the blood flow is blocked at the distal end of the blood vessel where the plaque exists. Then, the operating tool is used to operate the blood vessel where the plaque exists. During the process, a thrombus will be generated, and the negative pressure providing structure provides negative pressure to push the blood with the thrombus out. The blood is then sucked into the blood collection bag 5; during the process, the filter in the blood return tube 4 intercepts the thrombus, and the filtered blood is sucked into the blood collection bag 5; if the surgical operation time is too long, in order to avoid the risk of long-term blockage of distal blood flow, the substance in the blocking balloon 2 can be sucked out within a safe time interval to restore distal blood flow while ensuring that all thrombi generated during a single vascular operation flow out of the body. After a period of recovery, the above-mentioned blocking operation is repeated again, and the above-mentioned blocking-recovery process is repeated continuously to ensure that the patient's distal limb blood flow and safety are guaranteed while the thrombus is removed.

[0034] The blood collected in the blood collection bag 5 can be returned to the patient's body. When interventional and biological treatment are needed to treat arterial embolism, when enough blood for platelet-rich plasma therapy (PRP) is collected in the blood collection bag 5, the blood collection bag 5 is replaced. The blood in the removed blood collection bag 5 is then processed to obtain various effective growth factors for biological treatment of arterial embolism, and the blood is returned to the site of arterial embolism and combined with the device to achieve a combined therapeutic effect of interventional and biological treatment.

[0035] For example, the distance between the blocking balloon 2 and the first end of the sheath tube 1 is 1 cm; however, it should be noted that the distance between the blocking balloon 2 and the first end of the sheath tube 1 can be any distance less than 2 cm. The first end of the sheath tube 1 is an inclined insertion end.

[0036] A more preferred embodiment is to refer to Figure 1 、 Figure 2 ; A blood inlet port 14 is set in the sheath tube 1 area between the blocking balloon 2 and the first end of the sheath tube 1, and multiple blood inlet ports 14 can be set in 360 degrees in the sheath tube 1 area between the blocking balloon 2 and the first end of the sheath tube 1; this setting can prevent thrombus from being stuck in the position between the blocking balloon 2 and the sheath tube 1, so that all thrombus can be drawn out.

[0037] A more preferred embodiment is that the inflation tube 3 of the blocking balloon 2 is attached to the outside of the sheath tube 1. This arrangement simplifies the difficulty of setting the inflation tube 3, and because the diameter of the inflation tube is much smaller than that of the sheath tube 1, its arrangement on the outside will not interfere with the surgical operation.

[0038] In a more preferred embodiment, the operation port 11 is arranged at the end of the second end of the sheath 1, and the center of the operation port 11 is on the longitudinal axis of the sheath 1; this arrangement can very conveniently deliver various operating instruments into the surgical area, reducing the difficulty of operation.

[0039] In a more preferred embodiment, the second end of the connecting tube 15 extends away from the sheath tube 1 at a position 3-5 cm away from the operation port 11; this arrangement can avoid interference of the connecting tube 15 on the operation of the operation port 11 and ensure mutual independence.

[0040] A more preferred embodiment is that the second end of the inflation tube 3 extends in a direction away from the sheath tube 1 at a position of the sheath tube 1 115-7 cm away from the operation port; or the inflation tube 3 and the connecting tube 15 are arranged at different angular positions on the same longitudinal axis of the sheath tube 1. The above arrangement avoids mutual interference between the inflation tube 3 and the connecting tube 15.

[0041] A more preferred embodiment is to refer to Figure 7The thrombus filter 7 is an arc-shaped or conical mesh disposed within the blood return tube 4 or the connecting tube 15, extending 360 degrees around the tube wall. The bottom of the arc-shaped or conical mesh faces away from the sheath 1. This facilitates directing thrombi to the bottom of the arc or cone, ensuring constant blood flow, reducing the risk of clogging of the thrombus filter 7, and increasing the filter area.

[0042] The above description is only a specific embodiment of the present application. Based on the above teachings of the present application, those skilled in the art may make other improvements or modifications based on the above embodiments. Those skilled in the art should understand that the above description is only a better explanation of the purpose of the present application, and the scope of protection of the present application shall be based on the scope of protection of the claims.

Claims

1. A device for negative pressure extraction and filtration of thrombus in arteries, characterized in that: include The sheath tube has a first end which is an end disposed in the body during use, and an opposite end which is a second end, the second end of the sheath tube is provided with an operation port, and the first end of the sheath tube is provided with an opening; The blocking balloon is arranged at the first end of the sheath, and blocks the balloon from entering the body in the non-inflated state. In the inflated state, the balloon adheres to the blood vessel wall to block blood flow; an inflation tube connected to the blocking balloon, the inflation tube being arranged along the longitudinal axis of the sheath tube and closely attached to the sheath tube, the first end of the inflation tube extending into the blocking balloon, and the second end of the inflation tube being separated from the second end of the sheath tube and extending away from the sheath tube; A blood return tube, the first end of which is directly connected to the sheath tube, or a connecting tube is provided at the second end of the sheath tube, the blood return tube is connected to the connecting tube, and a thrombus filter is provided in the blood return tube or the connecting tube; A blood collection bag is used to collect blood, and the blood collection bag is connected to a blood return tube; The negative pressure providing structure is used to provide negative pressure for drawing blood into the blood collection bag. The negative pressure providing structure is a cavity structure arranged on the outside of the blood collection bag.

2. The device for negative pressure extraction and filtration of thrombus in arteries according to claim 1, characterized in that: The distance between the blocking balloon and the first end of the sheath is less than 2 cm.

3. The device for negative pressure extraction and filtration of thrombus in arteries according to claim 1, characterized in that: A blood inlet is provided in the sheath region between the blocking balloon and the first end of the sheath.

4. The device for negative pressure extraction and filtration of thrombus in arteries according to claim 1, characterized in that: The filling tube of the blocking balloon is attached to the outside of the sheath tube.

5. The device for negative pressure extraction and filtration of thrombus in arteries according to claim 1, characterized in that: The operation port is arranged at the end of the second end of the sheath tube, and the center of the operation port is on the longitudinal axis of the sheath tube.

6. The device for negative pressure extraction and filtration of thrombus in arteries according to claim 1, characterized in that: The second end of the connecting tube extends in a direction away from the sheath tube at a position of the sheath tube 3-5 cm away from the operation port.

7. The device for negative pressure extraction and filtration of thrombus in arteries according to claim 6, characterized in that: The second end of the inflation tube extends away from the sheath tube at a position of the sheath tube 5-7 cm away from the operation port; or the inflation tube and the connecting tube are arranged at different angular positions on the same longitudinal axis of the sheath tube.

8. The device for negative pressure extraction and filtration of thrombus in arteries according to claim 1, characterized in that: The cavity structure is a negative pressure cabin that completely surrounds the outside of the blood collection bag. The negative pressure cabin is a rigid structure. Connecting structures extend from both sides of the middle of the negative pressure cabin and are connected to the middle of the blood collection bag. A vacuum tube extends from the negative pressure cabin. A one-way valve that allows air to escape is provided on the vacuum tube. A ventilation switch that can be opened to allow air to enter is provided on the side of the vacuum tube that is closer to the negative pressure cabin relative to the one-way valve.

9. The device for negative pressure extraction and filtration of thrombus in arteries according to claim 1, characterized in that: The thrombus filtering net is an arc-shaped net or a cone-shaped net arranged in the blood return tube or the connecting tube, and the bottom of the arc-shaped net and the cone-shaped net are facing away from the sheath tube.

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