Disposable precision filter infusion set

Abstract

The utility model discloses a kind of disposable precision filtering infusion apparatus, including infusion tube, drip bottle and flow regulator are arranged on infusion tube, drip bottle is located above flow regulator, drip bottle and the infusion tube between flow regulator are provided with three-dimensional chamber, the back top of three-dimensional chamber and the front bottom are horizontally provided with partition, two partition and three-dimensional chamber side wall between are provided with two groups of central front and rear wave-shaped clamping groove that penetrate front and rear.This utility model modification adsorption filter membrane can adsorb charged particles, realize physical aperture filtration and electrostatic adsorption double filtration mechanism, and the filtering effect is better;Buffer cavity is formed between post fine filter membrane and modification adsorption filter membrane, to avoid that the attached particle is too close to cause blockage;Pre-filter membrane, post fine filter membrane and modification adsorption filter membrane are all folded three-dimensional structure, larger filtering area under same diameter, more efficient, also more difficult to occur blockage problem.

Description

Technical Field

[0001] This utility model relates to the field of infusion set technology, specifically a disposable precision filter infusion set. Background Technology

[0002] Disposable precision filter infusion sets are a common medical consumable. Their core feature is that they have a precision filtration device that can effectively filter out particulate impurities such as rubber debris, drug crystals, and dust from the air in the infusion solution. The higher the filtration precision, the more tiny particles can be filtered out, which can reduce adverse reactions caused by particles entering the human body, such as vascular blockage, phlebitis, and granulomas.

[0003] Compared to ordinary infusion sets, it is more widely used in situations where the quality of infusion is critical. For example, when infusing fat emulsions, chemotherapy drugs, or traditional Chinese medicine injections, using a precision filter infusion set can reduce the probability of adverse reactions and ensure medication safety. At the same time, this type of infusion set is also often chosen for children, the elderly, patients with weakened immune systems, and patients who are sensitive to particulate matter.

[0004] Existing disposable precision filtration infusion sets rely solely on two internal filter membranes for filtration. These two membranes, combined together, divide the three-dimensional chamber into two parts, resulting in a lack of internal buffering. During filtration, the side of the filter membrane facing the incoming medication experiences concentrated pressure from the medication. Under this pressure, adhering particles adhere tightly, easily causing blockage and reducing filtration efficiency. When a patient receives several bottles of medication consecutively, the blockage affecting the flow rate of the precision filtration device leads to a significant increase in infusion time, which requires improvement. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a disposable precision filter infusion set, which solves the problem that the precision filter device of existing disposable precision filter infusion sets is prone to clogging, affecting filtration efficiency.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A disposable precision filtration infusion set includes an infusion tube, on which a drip chamber and a flow regulator are provided. The drip chamber is located above the flow regulator. A three-dimensional chamber is provided on the infusion tube between the drip chamber and the flow regulator. The top of the back side and the bottom of the front side of the three-dimensional chamber are connected to the infusion tube. The back top and front bottom of the three-dimensional chamber are horizontally provided with partition plates. Two sets of corrugated clamping grooves with the center running through the front and back are provided between the two partition plates and the side wall of the three-dimensional chamber. A pre-filter membrane and a post-filter membrane are fixed in the corrugated clamping groove on the front side, and a modified adsorption filter membrane is fixed in the corrugated clamping groove on the back side. An overflow plate is provided between the lower partition plate and the inner walls on both sides of the three-dimensional chamber. The top of the overflow plate forms an overflow channel near the upper partition plate. An exhaust port is provided on the front of the three-dimensional chamber. An exhaust valve is provided on the front of the inner wall of the three-dimensional chamber at the position corresponding to the exhaust port. A through hole is provided on the back of the exhaust valve and a hydrophobic membrane is fixed inside.

[0007] Preferably, the pre-filter membrane is a meltblown polypropylene film, and the post-filter membrane is a nylon membrane.

[0008] Preferably, the pre-filter membrane and the post-filter membrane are seamlessly welded together by ultrasonic hot melting to form a composite gradient filter membrane.

[0009] Preferably, the modified adsorption filter membrane is a positively charged modified nylon microporous filter membrane.

[0010] Preferably, a buffer cavity is formed between the post-filtration membrane and the modified adsorption membrane.

[0011] Compared with the prior art, the present invention has the following beneficial effects: This novel modified adsorption filter membrane can adsorb charged particles, achieving a dual filtration mechanism of physical pore size filtration and electrostatic adsorption, resulting in better filtration. A buffer cavity is formed between the post-fine filtration membrane and the modified adsorption filter membrane to prevent the adhered particles from being too tightly packed and causing blockage. The pre-filtration membrane, post-fine filtration membrane, and modified adsorption filter membrane are all folded three-dimensional structures, resulting in a larger filtration area and higher efficiency for the same diameter, and making them less prone to clogging. This solves the problem of easy clogging affecting the filtration efficiency of existing disposable precision filtration infusion sets. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a front view of the internal structure of the three-dimensional cavity of this utility model; Figure 3 This is a side view of the internal structure of the three-dimensional cavity of this utility model; Figure 4 This is a partial structural side view of the pre-filter membrane and the post-filter membrane of this utility model.

[0013] In the diagram: 1. Infusion tube; 2. Drip pitcher; 3. Flow regulator; 4. Three-dimensional chamber; 5. Hydrophobic membrane; 6. Divider plate; 7. Corrugated groove; 8. Pre-filter membrane; 9. Post-filter membrane; 10. Modified adsorption membrane; 11. Vent; 12. Vent valve; 13. Through hole; 14. Overflow plate. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] like Figure 1-4 As shown, this utility model provides a technical solution: a disposable precision filtration infusion set, including an infusion tube 1, a drip chamber 2 and a flow regulator 3 are provided on the infusion tube 1, the drip chamber 2 is located above the flow regulator 3, and a three-dimensional chamber 4 is provided on the infusion tube 1 between the drip chamber 2 and the flow regulator 3, the top of the back and the bottom of the front of the three-dimensional chamber 4 are connected to the infusion tube 1. The top back and bottom front of the three-dimensional chamber 4 are horizontally equipped with partition plates 6. Two sets of corrugated clamping grooves 7 with the central through-hole are provided between the two partition plates 6 and the side wall of the three-dimensional chamber 4. The corrugated clamping groove 7 on the front is fixed with a pre-filter membrane 8 and a post-filter membrane 9. The corrugated clamping groove 7 on the back is fixed with a modified adsorption filter membrane 10. The pre-filter membrane 8 is a melt-blown polypropylene film with a pore size of 5-10μm. The post-filter membrane 9 is a nylon membrane with a pore size of 0.2-1.2μm. The pre-filter membrane 8 and the post-filter membrane 9 are seamlessly welded by ultrasonic hot melting to form a composite gradient filter membrane. A buffer cavity is formed between the post-filter membrane 9 and the modified adsorption filter membrane 10. Modified adsorption filter membrane 10 is a positively charged modified nylon microporous filter membrane with a pore size not exceeding 0.2 μm. The nylon membrane is treated with epichlorohydrin, and the epoxy groups of epichlorohydrin react with the amino or amide groups at the end of the nylon molecular chain, introducing active epoxy groups on the membrane surface. When a compound with a tertiary amine group, such as trimethylamine, is introduced, the tertiary amine group attacks and opens the epoxy group, resulting in a ring-opening reaction, ultimately forming a quaternary ammonium salt group. The quaternary ammonium salt group is permanently fixed to the surface of the nylon membrane and the inner wall of the pores through chemical bonds. This group will ionize in any aqueous solution, thereby giving the membrane surface a strong positive charge, which can adsorb charged particles and realize a dual filtration mechanism of physical pore size filtration and electrostatic adsorption. An overflow plate 14 is provided between the lower partition plate 6 and the inner walls on both sides of the three-dimensional chamber 4. The top of the overflow plate 14 forms an overflow channel near the upper partition plate 6. An exhaust port 11 is provided on the front of the three-dimensional chamber 4. An exhaust valve 12 is provided on the front of the inner wall of the three-dimensional chamber 4 at the position corresponding to the exhaust port 11. A through hole 13 is provided on the back of the exhaust valve 12 and a hydrophobic membrane 5 is fixed inside it.

[0016] Working principle: The pre-filter membrane 8 and the post-filter membrane 9 are seamlessly welded together by ultrasonic hot melting to form a composite gradient filter membrane, which avoids the risk of leaching caused by glue bonding. The modified adsorption filter membrane 10 is a positively charged modified nylon microporous filter membrane that can adsorb charged particles, realizing a dual filtration mechanism of physical pore size filtration and electrostatic adsorption, resulting in better filtration effect. A buffer cavity is formed between the post-filter membrane 9 and the modified adsorption filter membrane 10, so that there is drug liquid pressure on both sides of the pre-filter membrane 8 and the post-filter membrane 9, preventing the attached particles from being too tightly packed and causing blockage. The pre-filter membrane 8, the post-filter membrane 9 and the modified adsorption filter membrane 10 are all folded three-dimensional structures, with a larger filtration area for the same diameter, higher efficiency and less prone to blockage.

[0017] It should be noted that, in this document, terms such as “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0018] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A disposable precision filtration infusion set, comprising an infusion tube (1), wherein a drip chamber (2) and a flow regulator (3) are disposed on the infusion tube (1), the drip chamber (2) being located above the flow regulator (3), characterized in that: A three-dimensional chamber (4) is provided on the infusion tube (1) between the dripping pot (2) and the flow regulator (3). The top of the back side and the bottom of the front side of the three-dimensional chamber (4) are connected to the infusion tube (1). The top back and bottom front of the three-dimensional chamber (4) are horizontally provided with partition plates (6). Two sets of corrugated clamping grooves (7) with the front and back centers are provided between the two partition plates (6) and the side wall of the three-dimensional chamber (4). A pre-filter membrane (8) and a post-filter membrane (9) are fixed in the corrugated clamping groove (7) on the front side. A modified adsorption filter membrane (10) is fixed in the corrugated clamping groove (7) on the back side. An overflow plate (14) is provided between the partition plate (6) located below and the inner walls on both sides of the three-dimensional chamber (4). The top of the overflow plate (14) forms an overflow channel close to the partition plate (6) located above. An exhaust port (11) is provided on the front of the three-dimensional chamber (4). An exhaust valve (12) is provided on the front of the inner wall of the three-dimensional chamber (4) at the position corresponding to the exhaust port (11). A through hole (13) is provided on the back of the exhaust valve (12) and a hydrophobic membrane (5) is fixed inside.

2. The disposable precision filtration infusion set according to claim 1, characterized in that: The pre-filter membrane (8) is a meltblown polypropylene film with a pore size of 5-10 μm, and the post-filter membrane (9) is a nylon membrane with a pore size of 0.2-1.2 μm.

3. The disposable precision filtration infusion set according to claim 2, characterized in that: The pre-filter membrane (8) and the post-filter membrane (9) are seamlessly welded together by ultrasonic hot melting to form a composite gradient filter membrane.

4. The disposable precision filtration infusion set according to claim 1, characterized in that: The modified adsorption filter membrane (10) is a positively charged modified nylon microporous filter membrane with a pore size not exceeding 0.2 μm.

5. A disposable precision filtration infusion set according to claim 1, characterized in that: A buffer cavity is formed between the post-filtration membrane (9) and the modified adsorption membrane (10).

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