An infusion set

Abstract

The present invention relates to the technical field of medical devices, and discloses an infusion set comprising a bottle stopper piercer, an injection needle, and an infusion tube connected between the bottle stopper piercer and the injection needle, wherein a dropper is provided on the infusion tube; the infusion tube comprises an outer tube wall and an inner tube wall spaced apart within the outer tube wall, a first heat-insulating cavity being formed between the inner tube wall and the outer tube wall; the infusion tube is provided with a light-blocking layer for shielding external light; the dropper comprises an outer tube wall and an inner tube wall spaced apart within the outer tube wall, a second heat-insulating cavity being formed between the inner tube wall and the outer tube wall; the dropper is provided with a light-reducing layer, which reduces the light entering the dropper while enabling medical personnel to observe the liquid level within the dropper. The light-reducing layer not only prevents the influence of external light on the infusion liquid in the dropper, but also enables medical personnel to observe the infusion speed and whether the infusion liquid has been completely dripped through the dropper, thereby facilitating the medical personnel's care.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an infusion set. Background Art

[0002] Clinically, some injections have poor stability and are prone to oxidation, decomposition, discoloration, and other reactions when exposed to light. Therefore, light-protective injections require light-protected infusion during use. Temperature is also a crucial factor in the infusion of light-protective injections. Excessively high or low temperatures can adversely affect the stability and efficacy of the drug.

[0003] During intravenous infusion, an infusion set is used to establish a channel between the vein and the drug solution. When infusing a light-shielding injection, the light-shielding injection needs to flow in the infusion set. Since the light-shielding injection is dispersed over a large specific area in the infusion set, it is necessary to ensure that the infusion set has both heat preservation and light-shielding functions. However, there is currently a lack of infusion sets with both heat preservation and light-shielding functions, which affects the efficacy of the light-shielding injection. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that the existing infusion sets do not have both heat preservation and light protection functions, resulting in adverse effects on the efficacy of light-shielding injections.

[0005] In order to solve the above technical problems, the present invention provides an infusion set, comprising a bottle stopper puncture device connected to an infusion bottle, an injection needle for inserting into a venous blood vessel, and an infusion tube connected between the bottle stopper puncture device and the injection needle, wherein the infusion tube is provided with a drip tube;

[0006] The tube wall of the infusion tube includes an outer tube wall and an inner tube wall spaced inside the outer tube wall, the space between the outer tube wall and the inner tube wall is closed at both ends of the infusion tube, and the space between the outer tube wall and the inner tube wall forms a first heat-insulating cavity;

[0007] A light-blocking layer is provided on the outer side of the inner tube wall and / or the inner side of the outer tube wall;

[0008] The dropper tube comprises an outer tube wall and an inner tube wall spaced apart inside the outer tube wall, the space between the outer tube wall and the inner tube wall is closed at both ends of the dropper tube, and the space between the outer tube wall and the inner tube wall forms a second heat-insulating cavity;

[0009] A light-reducing layer is provided on the inner side of the outer cylinder wall or the outer side of the inner cylinder wall. The light-reducing layer reduces the light entering the dripping cylinder and enables medical staff to observe the liquid level in the dripping cylinder.

[0010] As a preferred solution, the injection needle is connected to a needle tube, one end of the needle tube away from the needle is connected to the infusion tube, and the outer side of the needle tube is coated with thermochromic ink.

[0011] As a preferred solution, the end of the needle tube away from the injection needle is provided with a spiral joint, and the end of the infusion tube is provided with an external thread that matches the spiral joint.

[0012] As a preferred solution, the light-blocking layer is arranged on the inner side of the outer tube wall, and the outer tube wall is a plastic film layer covering the light-blocking layer.

[0013] As a preferred solution, the light-blocking layer is made of black rubber-plastic material.

[0014] As a preferred solution, the inner tube wall is made of medical plastic.

[0015] As a preferred solution, the light-reducing layer is arranged on the inner side of the outer tube wall, and the outer tube wall is a plastic film layer covering the light-reducing layer.

[0016] As a preferred solution, the inner cylinder wall is made of medical plastic.

[0017] As a preferred solution, a flow regulator is provided between the dropper and the injection needle, and a doser is further provided on the infusion tube, and the doser is located between the flow regulator and the injection needle.

[0018] As a preferred solution, the infusion tube is further provided with a filter, and the filter is located between the dosing device and the injection needle.

[0019] Compared with the prior art, the infusion set of the present invention has the following advantages:

[0020] The invention comprises a bottle stopper puncture device connected to an infusion bottle, an injection needle for inserting into a venous blood vessel, an infusion tube connected between the bottle stopper puncture device and the injection needle, and a dropper is provided on the infusion tube; the infusion tube comprises an outer tube wall and an inner tube wall spaced inside the outer tube wall, the space between the outer tube wall and the inner tube wall is closed at both ends of the infusion tube, and the space between the outer tube wall and the inner tube wall is a first heat-insulating cavity; the first heat-insulating cavity can prevent heat exchange caused by convection, thereby playing a role of heat preservation and heat insulation for the infusion in the infusion tube; an opaque light-blocking layer is provided on the outer side of the inner tube wall and / or the inner side of the outer tube wall, and the light-blocking layer plays a role of shielding external light; the dropper comprises an outer tube wall and a spacer The inner tube wall is arranged inside the outer tube wall, and the gap between the outer tube wall and the inner tube wall is closed at both ends of the dripping tube. The gap between the outer tube wall and the inner tube wall is a second thermal insulation cavity, which can prevent heat exchange caused by convection, thereby playing a role in thermal insulation for the infusion liquid in the dripping tube; a partially transparent light-reducing layer is provided on the inner side of the outer tube wall or the outer side of the inner tube wall, which reduces the light entering the dripping tube while allowing medical staff to observe the liquid level in the dripping tube, not only reducing the influence of external light on the infusion liquid in the dripping tube, but also allowing medical staff to observe the infusion speed and whether the infusion liquid has been dripped through the dripping tube, which is convenient for medical staff to care. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 1 is a schematic structural diagram of an infusion set according to an embodiment of the present invention;

[0022] Figure 2 yes Figure 1 Cross-section at AA;

[0023] Figure 3 yes Figure 1 Cross-section at the middle BB;

[0024] In the figure, 1. bottle stopper puncture device; 2. injection needle; 21. needle tube; 211. spiral joint; 3. infusion tube; 31. outer tube wall; 32. inner tube wall; 33. light-blocking layer; 34. first insulation cavity; 4. drip tube; 41. outer tube wall; 42. inner tube wall; 43. light-reducing layer; 44. second insulation cavity; 5. flow regulator; 6. doser; 7. filter; 8. water-stop clamp. DETAILED DESCRIPTION

[0025] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0026] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "top", "bottom", etc., indicating the 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 the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. It should be understood that the terms "first", "second", etc. are used in the present invention to describe various information, but such information should not be limited to these terms, which are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information.

[0027] like Figures 1 to 3 As shown, an infusion set of a preferred embodiment of the present invention includes a bottle stopper puncture device 1 connected to an infusion bottle, an injection needle 2 for inserting into a venous blood vessel, an infusion tube 3 connected between the bottle stopper puncture device 1 and the injection needle 2, and a dropper 4 is provided on the infusion tube 3; the infusion tube 3 includes an outer tube wall 31 and an inner tube wall 32 coaxially arranged inside the outer tube wall 31, and a first heat-insulating cavity 34 is formed between the outer wall of the inner tube wall 32 and the inner wall of the outer tube wall 31; the tube wall of the infusion tube 3 includes an outer tube wall 31 and an inner tube wall 32 spaced apart inside the outer tube wall 31, the gap between the outer tube wall 31 and the inner tube wall 32 is closed at both ends of the infusion tube 3, and the gap between the outer tube wall 31 and the inner tube wall 32 constitutes a first heat-insulating cavity 34; the first heat-insulating cavity 34 can prevent heat exchange caused by convection, thereby playing a role in heat preservation and insulation for the infusion liquid flowing through the infusion tube 3. Function; A light-blocking layer 33 is provided on the outer side of the inner tube wall 32 and / or the inner side of the outer tube wall 31; the light-blocking layer 33 plays a role in shielding external light, so that the transmittance of the infusion tube 3 is zero, thereby avoiding the infusion liquid from being affected by light when flowing through the infusion tube 3; the drip tube 4 includes an outer tube wall 41 and an inner tube wall 42 spaced apart inside the outer tube wall 41, and the interval between the outer tube wall 41 and the inner tube wall 42 is closed at both ends of the drip tube 4, and the interval between the outer tube wall 41 and the inner tube wall 42 constitutes a second insulation cavity 44; the second insulation cavity 44 can prevent heat exchange caused by convection, thereby playing a role in keeping the infusion liquid flowing through the drip tube 4 warm; a light-reducing layer 43 is provided on the inner side of the outer tube wall 41 or the outer side of the inner tube wall 42, and the light-reducing layer 43 reduces the light entering the drip tube 4 while allowing medical staff to observe the liquid level in the drip tube 4. The provision of the light-reducing layer 43 not only reduces the influence of external light on the infusion liquid in the dripping tube, but also enables medical staff to observe the infusion speed and whether the infusion liquid has been dripped out through the dripping tube, thereby facilitating the care of medical staff.

[0028] It should be noted that, since the residence time of the infusion liquid in the dripping tube 4 is relatively short, and a light-reducing layer 43 is provided on the outer wall of the dripping tube 4, the small amount of light entering the dripping tube 4 has little effect on the infusion liquid; specifically, in this embodiment, the transmittance of the light-reducing layer 43 to light with a wavelength in the range of 290nm to 450nm is controlled to be between 10% and 30%; wherein, by adjusting the content of the pigment in the light-reducing layer 43, the transmittance of the light-reducing layer 43 can be between 10% and 30%.

[0029] Specifically, there are various ways to implement the light-blocking layer 33 to shield external light. For example, the light-blocking layer can be configured as a black ink coating of a certain thickness. In this embodiment, the light-blocking layer 33 is made of a black rubber-plastic material, which has a certain elasticity and ductility, facilitating the bending of the infusion tube 3 during use. The light-blocking layer 33 is disposed on the inner side of the outer tube wall 31, which is a plastic film layer that covers the light-blocking layer 33. During the production process, the outer tube wall 31 can be extruded in one step using a multi-layer co-extrusion device. After the extrusion is completed, the inner and outer tube walls 32 and 31 are heat-sealed at both ends. Alternatively, when the infusion tube 3 is assembled, the inner and outer tube walls 32 and 32 are respectively sealed to corresponding connectors at both ends.

[0030] Among them, the light-blocking layer 33 is arranged on the inner side of the outer tube wall 31, and the light-blocking layer 33 does not contact the infusion liquid, which can avoid the influence of the light-shielding components contained in the light-blocking layer on the infusion liquid, and ensure that the infusion liquid is not contaminated; moreover, the light-blocking layer 33 is arranged on the inner side of the outer tube wall 31, which can avoid scratching the outer tube wall and causing local light leakage in the light-blocking layer; in addition, when the light-blocking layer 33 is arranged on the inner side of the outer tube wall 31, the first heat-insulating cavity 34 is located between the light-blocking layer 33 and the inner tube wall 32 of the infusion tube. Therefore, when the light-blocking layer 33 absorbs external light and generates heat, it will not be directly transmitted to the inner tube wall 32 of the infusion tube 3, thereby avoiding the increase in the temperature of the infusion liquid caused by the heat absorption of the light-blocking layer 33, and further improving the heat-insulating performance of the infusion tube 3 in this embodiment.

[0031] Specifically, the inner tube wall 32 is made of medical plastic, which ensures the safety of the infusion liquid after contacting the inner tube wall 32 , and the light-reducing layer 43 is made of rubber and plastic material.

[0032] In this embodiment, the light-reducing layer 43 is disposed on the inner side of the outer tube wall 41 , and the outer tube wall 41 is a plastic film layer covering the light-reducing layer 43 .

[0033] The light-reducing layer 43 is disposed on the inner side of the outer tube wall 41. The light-reducing layer 43 does not contact the infusion liquid, thereby preventing the light-reducing components contained in the light-reducing layer from affecting the infusion liquid and ensuring that the infusion liquid is not contaminated. Furthermore, the light-reducing layer 43 is disposed on the inner side of the outer tube wall 41 to prevent scratching the outer tube wall and causing local light leakage from the light-blocking layer. Furthermore, when the light-reducing layer 43 is disposed on the inner side of the outer tube wall 41, the second heat-insulating cavity 44 is located between the light-reducing layer 43 and the inner tube wall 42. Therefore, when the light-reducing layer 43 absorbs external light and generates heat, the heat is not directly transmitted to the inner tube wall 42. This avoids an increase in the temperature of the infusion liquid caused by the heat absorbed by the light-reducing layer 43, further improving the heat-insulating performance of the drip tube 4 in this embodiment. In this embodiment, the inner tube wall 42 is made of medical plastic.

[0034] In this embodiment, the infusion needle 2 is connected to a needle tube 21. The end of the needle tube 21, away from the needle 2, is connected to the infusion tube 3. The outer surface of the needle tube 21 is coated with thermochromic ink. Specifically, the thermochromic ink used in this embodiment has the following basic temperature settings: 0°C, 5°C, 10°C, 15°C, 22°C, 31°C, 33°C, and 38°C. The thermochromic ink not only protects against light but also measures the temperature of the infusion fluid flowing through the needle tube 21. Furthermore, the provision of the thermochromic ink allows medical staff and the patient's family to more intuitively understand the infusion fluid temperature, facilitating appropriate measures. In this embodiment, the thermochromic ink is placed on the needle tube 21 connected to the needle 2, very close to the needle 2. The temperature of the infusion fluid measured by the thermochromic ink is closer to the temperature of the infusion fluid entering the human body, making it easier for the patient to observe.

[0035] In this embodiment, a spiral joint 211 is provided at the end of the needle tube 21 away from the injection needle 2, and an external thread that mates with the spiral joint 211 is provided at the end of the infusion tube 3. Because the diameter of the needle tube 21 is smaller than that of the infusion tube 3, the needle tube 21 and the infusion tube 3 are manufactured separately, which facilitates the processing and assembly of the infusion set. In this embodiment, a water-stop clamp 8 is also provided between the bottle stopper puncture device 1 and the drip tube 4. The water-stop clamp 8 can clamp the infusion tube 3 when needed, preventing the infusion liquid in the infusion bottle from flowing into the infusion tube 3.

[0036] In this embodiment, a drug doser 6 is further provided on the infusion tube 3, and the drug doser 6 is located between the flow regulator 5 and the injection needle 2. When the patient needs a quick injection of the drug, such as when the patient has an adverse reaction during the infusion process, the drug can be injected into the drug doser.

[0037] In this embodiment, a filter 7 is further provided on the infusion tube 3. The filter 7 is located between the dosing device 6 and the injection needle 2. A filter membrane is provided in the filter 7 for filtering particles in the drug solution to reduce adverse infusion reactions caused by the infusion.

[0038] In summary, the infusion set of this embodiment includes a bottle stopper puncture device connected to the infusion bottle, an injection needle for inserting into a venous blood vessel, an infusion tube connected between the bottle stopper puncture device and the injection needle, and a dropper is provided on the infusion tube; the infusion tube includes an outer tube wall and an inner tube wall spaced inside the outer tube wall, the space between the outer tube wall and the inner tube wall is closed at both ends of the infusion tube, and the space between the outer tube wall and the inner tube wall is a first thermal insulation cavity; the first thermal insulation cavity can prevent heat exchange caused by convection, thereby playing a role in heat preservation and heat insulation for the infusion in the infusion tube; an opaque light-blocking layer is provided on the outer side of the inner tube wall and / or the inner side of the outer tube wall, and the light-blocking layer plays a role in shielding external light; the dropper includes The outer tube wall and the inner tube wall are spaced apart and arranged inside the outer tube wall. The space between the outer tube wall and the inner tube wall is closed at both ends of the drip tube. The space between the outer tube wall and the inner tube wall is a second heat-insulating cavity. The second heat-insulating cavity can prevent heat exchange caused by convection, thereby playing a role in heat preservation and heat insulation for the infusion liquid in the drip tube. A partially transparent light-reducing layer is provided on the inner side of the outer tube wall or the outer side of the inner tube wall. The light-reducing layer reduces the light entering the drip tube while allowing medical staff to observe the liquid level in the drip tube. It not only reduces the influence of external light on the infusion liquid in the drip tube, but also allows medical staff to observe the infusion speed and whether the infusion liquid has been dripped through the drip tube, which is convenient for medical staff to care.

[0039] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. An infusion set, characterized in that: The invention comprises a bottle stopper puncture device (1) connected to an infusion bottle, an injection needle (2) for inserting into a venous blood vessel, and an infusion tube (3) connected between the bottle stopper puncture device (1) and the injection needle (2), wherein the infusion tube (3) is provided with a dropper (4); The tube wall of the liquid infusion tube (3) comprises an outer tube wall (31) and an inner tube wall (32) spaced apart within the outer tube wall (31); the space between the outer tube wall (31) and the inner tube wall (32) is closed at both ends of the liquid infusion tube (3); and the space between the outer tube wall (31) and the inner tube wall (32) forms a first heat-insulating cavity (34); A light-blocking layer (33) is provided on the outer side of the inner tube wall (32) and / or the inner side of the outer tube wall (31); The dropper tube (4) comprises an outer tube wall (41) and an inner tube wall (42) spaced apart within the outer tube wall (41); the space between the outer tube wall (41) and the inner tube wall (42) is closed at both ends of the dropper tube (4); and the space between the outer tube wall (41) and the inner tube wall (42) forms a second heat-insulating cavity (44); A light-reducing layer (43) is provided on the inner side of the outer cylinder wall (41) or the outer side of the inner cylinder wall (42). The light-reducing layer (43) reduces the light entering the dripping cylinder (4) while enabling medical personnel to observe the liquid level in the dripping cylinder (4); The light-blocking layer (33) is arranged on the inner side of the outer tube wall (31), and the outer tube wall (31) is a plastic film layer covering the light-blocking layer (33); The light-reducing layer (43) is arranged on the inner side of the outer cylinder wall (41), and the outer cylinder wall (41) is a plastic film layer coated on the light-reducing layer (43); the light-reducing layer (43) has a transmittance greater than 10% and less than 30% for light with a wavelength in the range of 290nm to 450nm; the injection needle (2) is connected to a needle tube (21), and the end of the needle tube (21) away from the needle (2) is connected to the infusion tube (3), and the outer side of the needle tube (21) is coated with thermochromic ink.

2. The infusion set according to claim 1, characterized in that: The end of the needle tube (21) away from the injection needle (2) is provided with a spiral joint (211), and the end of the infusion tube (3) is provided with an external thread that matches the spiral joint (211).

3. The infusion set according to claim 1, characterized in that: The light-blocking layer (33) is made of black rubber-plastic material.

4. The infusion set according to claim 1, characterized in that: The inner tube wall (32) is made of medical plastic.

5. The infusion set according to claim 1, characterized in that: The inner cylinder wall (42) is made of medical plastic.

6. The infusion set according to claim 1, characterized in that: A flow regulator (5) is provided between the dropper (4) and the injection needle (2), and a doser (6) is also provided on the infusion tube (3). The doser (6) is located between the flow regulator (5) and the injection needle (2).

7. The infusion set according to claim 6, characterized in that: The infusion tube (3) is further provided with a filter (7), and the filter (7) is located between the dosing device (6) and the injection needle (2).

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