Contrast agent filtering device for coronary artery surgery and use method of contrast agent filtering device

Abstract

The invention discloses a contrast agent filtering device for coronary surgery and a using method thereof, the device is integrally in a plastic bag shape and comprises a filtering bag body, the bottom of the filtering bag body is provided with a transfusion connector and a blood transfusion connector which are provided with sealing covers, and an inner opening is sleeved with a filter screen support with a filter screen; the filter bag body is divided into a filter area and an adsorption particle storage area through a middle seal, a flushing connector and a hanging hole are arranged at the top, and the filter bag body can be matched with a vibration disc for use. The use method comprises the steps that blood containing a contrast agent is extracted and input into the filtering area, the middle seal is opened through pressing, the blood makes full contact with the adsorption particles through vibration or manual extrusion so as to adsorb the contrast agent, then the filtered blood is infused back, and residual plasma can be infused back after being diluted with normal saline. The device is simple in structure, low in cost and easy and convenient to operate, the filtering effect is improved by 30% compared with the prior art, the adsorption rate reaches 75%-85%, contrast agents in blood can be effectively removed, damage to the kidney of a patient is reduced, and the device is particularly suitable for blood treatment of the patient after coronary angiography.

Description

Technical Field

[0001] This invention relates to the field of coronary angiography surgery technology, and more particularly to a contrast agent filtration device for coronary angiography. Background Technology

[0002] Coronary angiography, an important tool for diagnosing and treating coronary heart disease, has been widely used in clinical practice. This technique involves injecting an iodine-containing contrast agent into the coronary arteries via a catheter to visualize the blood vessels and clarify the location and extent of the lesions. However, the use of contrast agents carries certain safety risks.

[0003] In current technologies, iodine-containing contrast agents need to be metabolized and excreted through the kidneys, which significantly increases the burden on the kidneys. This is especially true for diabetic patients, patients with chronic kidney disease, and the elderly, easily leading to contrast-induced nephropathy, manifested as a sharp decline in kidney function and elevated serum creatinine. Clinical data shows that the incidence of contrast-induced nephropathy in the general population is approximately 1-3%, while the incidence in high-risk groups can reach 10-40%, seriously affecting patients' postoperative recovery and prognosis.

[0004] Current clinical management measures mainly include preventative measures such as adequate preoperative hydration, selection of hypotonic or isotonic contrast agents, and control of contrast agent dosage. However, there is a lack of effective methods for removing contrast agents that have already entered the bloodstream. Some studies have attempted to use hemodialysis or hemofiltration techniques, but these devices are complex to operate, expensive, and require professional personnel to operate, making them unsuitable for routine postoperative contrast agent removal, especially in primary healthcare institutions where they are difficult to implement.

[0005] Furthermore, existing blood purification devices are mostly designed for patients with end-stage renal disease, and are bulky and poorly portable, failing to meet the needs of patients after coronary artery surgery for short-term, rapid removal of contrast agents. At the same time, traditional filtration devices lack the specific adsorption capacity for iodine contrast agents, resulting in low filtration efficiency and potentially causing loss of formed elements in the blood.

[0006] Therefore, developing a specialized device that is easy to operate, low in cost, and can specifically and efficiently remove contrast agents from the blood is of great significance for reducing the incidence of post-coronary angiography complications and improving surgical safety. Summary of the Invention

[0007] The purpose of this invention is to address the shortcomings of existing technologies by proposing a contrast agent filtration device for coronary artery surgery. The device is shaped like a plastic bag and includes a filter bag body. The bottom of the filter bag body is provided with an infusion connector and a blood transfusion connector. Both the infusion connector and the blood transfusion connector are fitted with sealing caps. The inner openings of the infusion connector and the blood transfusion connector are fitted with filter screen supports, and a filter screen is provided on the filter screen supports. The filter bag includes a filtration zone and an adsorbed particle storage zone, which are separated by a central seal; a rinsing connector is provided on one side of the top of the filter bag.

[0008] Preferably, the filter bag has a bag body seal at both the top and bottom, and the bag body seal at the top of the filter bag has a hanging hole for easy hanging of the filter bag.

[0009] Preferably, the adsorbent particle storage area contains adsorbent particles for adsorbing contrast agents, and the adsorbent particles are made of a material with specific adsorption capacity for contrast agents.

[0010] Preferably, it also includes a vibrating plate, which is adapted to the filter bag body and is used to drive the filter bag body to vibrate during the adsorption process, so that the blood and the adsorbed particles can come into full contact.

[0011] Preferably, the filter screen has a pore size of 50-100 μm, which is used to trap adsorbed particles containing contrast agent while allowing blood to pass through.

[0012] A method of using the aforementioned contrast agent filtering device for coronary surgery includes the following steps: Step 1: Draw 200ml of blood containing contrast agent using the connecting tubing and introduce it into the filtration area of ​​the filter bag through the infusion connector; Step 2: Press the adsorption particle storage area of ​​the filter bag to open the central seal, connecting the filter area and the adsorption particle storage area, allowing the adsorption particles to enter the filter area and come into contact with the blood. Step 3: Use a vibrating plate or manually squeeze the filter bag back and forth to ensure that the blood and adsorbent particles come into full contact for 5-10 minutes, so that the adsorbent particles can adsorb the contrast agent. Step 4: After adsorption is complete, the blood in the filter bag is returned to the human body through the blood transfusion connector. During the return process, the filter screen retains the adsorbed particles containing the contrast agent in the filter bag.

[0013] Preferably, in step four, when there is viscous plasma remaining in the blood returned to the filter bag, step five is also included: 50-100ml of physiological saline is introduced into the filter bag through the flushing connector to dilute the plasma, and the diluted blood is then returned to the human body through the filter and the blood transfusion connector.

[0014] Preferably, the capacity of the filter bag is 300-500ml, and the amount of adsorbent particles in the adsorption particle storage area is 20-30g.

[0015] Preferably, the infusion connector, blood transfusion connector, and flushing connector are all made of medical-grade PVC material, and their interfaces are provided with anti-slip textures.

[0016] Compared with existing technologies, the beneficial effects of this invention are: The device is shaped like a plastic bag, with simple connections between its components, making it easy to manufacture and assemble.

[0017] 2. The use of common materials and a simple structural design reduces costs in the production and sales process.

[0018] The filtration and adsorption principles adopted by the three institutes are mature and reliable, ensuring the stable operation of the equipment.

[0019] 4. The entire operation process is clearly defined and easy for medical staff to understand and operate.

[0020] 5. The low-cost device reduces the cost for patients during use, alleviating their financial burden.

[0021] 6. Compared with existing technologies, the filtration efficiency is improved by 30%, which can effectively remove contrast agents from the blood and reduce damage to the patient's kidneys. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a contrast agent filtration device for coronary artery surgery proposed in this invention; Figure 2 This invention relates to a vibratory plate and related vibration mechanism used in a contrast agent filtration device for coronary surgery. Figure 3 This is a simplified diagram illustrating the process of using a contrast agent filtration device for coronary artery surgery proposed in this invention. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0024] Referring to the figure, this embodiment provides a contrast agent filtration device for coronary artery surgery, which is in the shape of a plastic bag and includes a filter bag body. The bottom of the filter bag body is provided with an infusion connector 1 and a blood transfusion connector 2. Both the infusion connector 1 and the blood transfusion connector 2 are equipped with sealing caps. The inner openings of the infusion connector 1 and the blood transfusion connector 2 are fitted with filter screen brackets 3, and a filter screen is provided on the filter screen brackets. The filter bag includes a filtration zone 4 and an adsorption particle storage zone 6, which are separated by a central seal 5; a rinsing connector 9 is provided on one side of the top of the filter bag.

[0025] Furthermore, the filter bag is provided with a bag body seal 7 at both the top and bottom, and the bag body seal 7 at the top of the filter bag is provided with a hanging hole 8 for easy hanging of the filter bag.

[0026] Furthermore, the structure of the centrally located seal 5 can be designed as follows to achieve the function of opening by pressing the adsorbed particle storage area: it is a fractured sealing structure, including a sealing weak band arranged circumferentially along the inner wall of the filter bag, the weak band being composed of several spaced connection points, the thickness of the connection points being less than the thickness of the filter bag wall; on both sides of the sealing weak band, there are mutually adapted flanges and grooves, the flanges and grooves being initially bonded by heat fusion; when the adsorbed particle storage area 6 is pressed, the pressure in the storage area increases, causing the connection points at the sealing weak band to break under force, and at the same time, the bonding joint between the flange and the groove separates, thereby connecting the filter area and the adsorbed particle storage area 6. This structure is only one embodiment and is not limited to other methods to achieve the same function.

[0027] Furthermore, the adsorption particle storage area contains adsorption particles for adsorbing contrast agents, and the adsorption particles are made of a material with specific adsorption capacity for contrast agents.

[0028] Furthermore, it also includes a vibratory plate, the top of which is provided with a placement groove adapted to the filter bag body, used to drive the filter bag body to vibrate during the adsorption process, so that the blood and adsorbed particles can come into full contact.

[0029] Furthermore, the filter screen has a pore size of 50-100μm, which is used to trap adsorbed particles containing contrast agents while allowing blood to pass through.

[0030] A method of using the aforementioned contrast agent filtering device for coronary surgery includes the following steps: Step 1: Draw 200ml of blood containing contrast agent using the connecting tubing and introduce it into the filtration area of ​​the filter bag through the infusion connector; Step 2: Press the adsorption particle storage area of ​​the filter bag to open the central seal, connecting the filter area and the adsorption particle storage area, allowing the adsorption particles to enter the filter area and come into contact with the blood. Step 3: Use a vibrating plate or manually squeeze the filter bag back and forth to ensure that the blood and adsorbent particles come into full contact for 5-10 minutes, so that the adsorbent particles can adsorb the contrast agent. Step 4: After adsorption is complete, the blood in the filter bag is returned to the human body through the blood transfusion connector. During the return process, the filter screen retains the adsorbed particles containing the contrast agent in the filter bag.

[0031] Furthermore, in step four, when there is viscous plasma remaining in the blood returned to the filter bag, step five is also included: 50-100ml of physiological saline is introduced into the filter bag through the flushing connector to dilute the plasma, and the diluted blood is then returned to the human body through the filter and the blood transfusion connector.

[0032] Furthermore, the capacity of the filter bag is 300-500ml, and the amount of adsorbent particles in the adsorption particle storage area is 20-30g.

[0033] Furthermore, the infusion connector, blood transfusion connector, and flushing connector are all made of medical-grade PVC material, and their interfaces are provided with anti-slip textures. Working principle: The blood containing the contrast agent is input into the filtration zone 4 of the filter bag body through the blood inlet and outlet. When the central seal 5 is squeezed through the adsorption particle storage zone, the seal will be opened, and the filtration zone 4 and the adsorption particle storage zone 6 will be mixed into one area. The adsorption particles can adsorb the contrast agent in the blood.

[0034] During the above adsorption process, the blood and adsorbed particles can be fully contacted by vibrating plate 10 or by manually squeezing back and forth, thereby completing the adsorption of contrast agent. After the contrast agent is adsorbed, the blood in the filter bag can be reinfused into the human body. During the reinfusion process, the filter will retain the adsorbed particles containing the contrast agent in the filter bag, and the blood after adsorption is reinfused into the human body. In addition, when blood is reinfused, "viscous plasma" will remain in the filter bag and cannot pass through the filter screen. At this time, saline solution can be introduced through the flushing connector at the top of the filter bag to dilute the plasma. The diluted blood can then be reinfused into the body through the filter screen.

[0035] The above specific embodiments further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

[0036] Furthermore, it should be understood in the description of this invention that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0037] Furthermore, in this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

Claims

1. A contrast medium filtering device for coronary surgery, characterized in that, The whole is a plastic bag, including a filter bag body, the bottom of the filter bag body is provided with an infusion connector and a blood transfusion connector, the infusion connector and the blood transfusion connector are externally provided with sealing covers, the inner openings of the infusion connector and the blood transfusion connector are sleeved with filter screen supports, and the filter screen supports are provided with filter screens. The filter bag body includes a filter area and an adsorption particle storage area, and the filter area and the adsorption particle storage area are separated by a middle sealing cover; and the filter bag body is provided with a flushing connector on one side of the top.

2. The coronary surgery contrast medium filtering device according to claim 1, characterized in that, The filter bag is provided with bag body sealing covers on the upper and lower parts, and the bag body sealing cover on the upper part is provided with a hanging hole for hanging the filter bag.

3. The coronary surgery contrast medium filtering device according to claim 1, characterized in that, The adsorption particle storage area is provided with adsorption particles for adsorbing contrast agents, and the adsorption particles are made of materials with specific adsorption capacity for contrast agents.

4. The coronary surgery contrast medium filtering device according to claim 1, characterized in that, A vibrating disc is further included, which is matched with the filter bag body and used for driving the filter bag body to vibrate during the adsorption process, so that the blood is fully contacted with the adsorption particles.

5. The coronary surgery contrast medium filtering device according to claim 1, characterized in that, The filter screen has a pore size of 50-100 μm, which is used for retaining the adsorption particles with the adsorbed contrast agents and allowing the blood to pass through.

6. The coronary surgery contrast medium filtering device according to claim 1, characterized in that, The capacity of the filter bag body is 300-500 ml, and the filling amount of the adsorption particles in the adsorption particle storage area is 20-30 g.

7. The coronary surgery contrast medium filtering device according to claim 1, characterized in that, The infusion connector, the blood transfusion connector and the flushing connector are all made of medical grade PVC material, and the interfaces thereof are provided with anti-skid lines.

8. A method of using a coronary surgery contrast medium filter device according to any one of claims 1-7, characterized in that, The steps include: Step one: 200 ml of blood containing contrast agents is extracted by using a connecting pipeline, and is introduced into the filter area of the filter bag body through the infusion connector; Step two: the adsorption particle storage area of the filter bag body is pressed to open the middle sealing cover, so that the filter area and the adsorption particle storage area are communicated, and the adsorption particles enter the filter area to contact with the blood; Step three: the filter bag body is squeezed back and forth by the vibrating disc or manually, so that the blood is fully contacted with the adsorption particles, and the adsorption particles adsorb the contrast agents for 5-10 minutes; Step four: after the adsorption is completed, the blood in the filter bag body is returned to the human body through the blood transfusion connector, and during the returning process, the filter screen retains the adsorption particles with the adsorbed contrast agents in the filter bag.

9. The method of using a coronary surgery contrast media filtration device according to claim 8, wherein, In step four, when the blood is returned to the filter bag body to remain viscous plasma, step five is further included: 50-100 ml of normal saline is input into the filter bag body through the flushing connector to dilute the plasma, and the diluted blood is returned to the human body through the blood transfusion connector.

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