Disposable light-proof infusion apparatus

Abstract

The utility model relates to a disposable light-proof infusion apparatus, and belongs to the technical field of medical instruments. One end of the light-proof dropper is connected with a light-proof infusion bag, and the other end of the light-proof dropper is connected with an infusion needle; the liquid level indicating device comprises an indicating cavity communicated with the gas phase space of the light-proof dropper, and a liquid level indicating device arranged in the indicating cavity; the diaphragm is positioned in the indication cavity; an indication substance is stored in the sealed storage body; the releasing mechanism is matched with the sealed storage body; and the visible indication area is used for forming an externally visible mark after the indication substance is released. According to the liquid level indicating device, when liquid medicine is about to be used up or is emptied, the release mechanism is driven through deformation of the diaphragm, and finally a clear external mark is formed in a visible indicating area.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and particularly relates to a disposable light-shielding infusion set. Background Art

[0002] Intravenous infusion is one of the most commonly used drug administration methods in clinical treatment. As a key medical consumable, the safety, effectiveness, and convenience of a disposable infusion set are crucial. For some light-sensitive drugs (such as sodium nitroprusside, nitroglycerin, certain vitamins, chemotherapy drugs, etc.), light irradiation must be avoided during infusion to prevent drug decomposition, invalidation, or the generation of toxic and side effects. For this reason, light-shielding infusion sets made of opaque or materials with specific light-filtering functions are widely used clinically.

[0003] However, for existing conventional light-shielding infusion sets, since their main components such as the infusion bag, drip chamber, and infusion tubing are all made of light-impermeable materials, medical staff cannot directly observe the remaining amount and specific liquid level of the liquid medicine in the infusion bag and the drip chamber with the naked eye. This brings a series of clinical problems and potential risks.

[0004] For example, it is difficult for medical staff to accurately judge when the liquid medicine is completely infused. Especially in the case where it is not detected in time, it may cause air at the end of the infusion tubing to enter the patient's vein, and in severe cases, it may trigger air embolism, endangering the patient's life safety. For example, the inability to predict the state that the liquid medicine is about to run out may lead to the treatment not being carried out on time and continuously, affecting the treatment effect, especially in the drug treatment that requires precise control of the administration time and dose.

[0005] To solve the above problems, some attempts have been made in the prior art. For example, using an infusion pump with air detection and alarm functions can avoid air embolism to a certain extent, but the infusion pump is costly and not applicable or equipped in all situations, and it cannot completely replace the direct or indirect understanding of the liquid level state. In addition, there are also some design attempts to integrate complex mechanical or electronic liquid level indicating devices on the infusion set, but these devices are often complex in structure, high in cost, insufficient in reliability, or inconvenient to operate, and it is difficult to be widely promoted and applied on disposable infusion sets that are cost-sensitive and have a large consumption. Summary of the Utility Model

[0006] To solve the above problems of the prior art, the utility model provides a disposable light-shielding infusion set.

[0007] To achieve the above object, the technical solution adopted by the utility model is:

[0008] Provide a disposable light-shielding infusion set, comprising:

[0009] A light-shielding drip chamber, one end of which is connected to a light-shielding infusion bag, and the other end is connected to an infusion needle;

[0010] A liquid level indicating device, which cooperates with the light-shielding dropper and is used to indicate the liquid level state of the liquid medicine in the light-shielding infusion set;

[0011] Wherein, the liquid level indicating device includes:

[0012] An indicating cavity, which is communicated with the gas phase space of the light-shielding dropper;

[0013] A diaphragm, which is located in the indicating cavity and can be deformed in a concave shape towards the side of the light-shielding dropper in response to the air pressure change in the light-shielding dropper;

[0014] A sealed storage body storing an indicating substance, which is connected to the diaphragm and moves together with it;

[0015] A release mechanism, which cooperates with the sealed storage body and is used to break the seal of the sealed storage body to release the indicating substance when the diaphragm deforms and drives the sealed storage body to displace;

[0016] A visible indicating area, which is used to form an externally visible mark after the indicating substance is released.

[0017] Preferably, the liquid level indicating device further includes:

[0018] An anchoring structure fixed to the inner wall of the indicating cavity;

[0019] The anchoring structure is configured such that when the sealed storage body moves with the diaphragm and displaces relative to the anchoring structure, the release mechanism acts on the sealed storage body to break its seal.

[0020] Preferably, the release mechanism includes:

[0021] An easy-to-tear strip, which defines a partial wall surface of the sealed storage body;

[0022] And, the easy-to-tear strip is connected to the anchoring structure;

[0023] Wherein, when the sealed storage body displaces relative to the anchoring structure, the easy-to-tear strip is torn off from the sealed storage body.

[0024] Preferably, a preset tearing line is provided on the easy-to-tear strip;

[0025] The tearing line is configured such that when the sealed storage body displaces relative to the anchoring structure, the easy-to-tear strip can be controllably torn off from the sealed storage body.

[0026] Preferably, the anchoring structure is a structure integrally formed on the inner wall of the indicating cavity;

[0027] Wherein, the anchoring structure is a convex post, a hook-like structure, or a through hole or slit for fixing the release mechanism.

[0028] Preferably, the sealed storage body is a dye capsule, and the indicating substance is a colored dye.

[0029] Preferably, the visible indication area includes:

[0030] An indicating paper disposed on the outer surface of the indicating cavity, and a region for collecting the released indicating substance is provided at the bottom of the indicating cavity.

[0031] Preferably, the liquid level indicating device further includes:

[0032] A guiding pipeline that connects the region for collecting the released indicating substance at the bottom of the indicating cavity to the indicating paper for guiding the indicating substance to the indicating paper.

[0033] Preferably, the visible indication area includes:

[0034] A transparent observation window, and the indicating paper is located within the transparent observation window.

[0035] Preferably, the wall of the indicating cavity is made of an opaque material or a material with light-shielding properties.

[0036] The present utility model provides a disposable light-shielding infusion set, and the beneficial effects of the present utility model are reflected in:

[0037] The liquid level indicating device of the present utility model can, when the liquid medicine is about to be exhausted or has been emptied (resulting in a characteristic change in the air pressure in the light-shielding dropper), drive the release mechanism through the deformation of the diaphragm, and finally form a clear external mark in the visible indication area. This provides a timely and clear warning signal for medical staff, enabling them to take timely measures (such as replacing the infusion bag or closing the infusion), thereby effectively avoiding serious medical risks such as air entering the patient's blood vessel and causing air embolism that may occur due to the failure to timely detect the exhaustion of the liquid medicine. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is the front view of the disposable light-shielding infusion set proposed by the present utility model;

[0039] Figure 2 is one of the cross-sectional views of the liquid level indicating device in the disposable light-shielding infusion set proposed by the present utility model;

[0040] Figure 3 is Figure 2 the partial enlarged schematic view at A;

[0041] Figure 4 For Figure 2 A partial enlarged schematic view at position B;

[0042] Figure 5 It is the second cross-sectional view of the liquid level indicating device in the disposable light-shielding infusion set proposed by the present utility model;

[0043] Figure 6 It is the structural schematic view of the sealed storage body in the disposable light-shielding infusion set proposed by the present utility model.

[0044] Explanation of reference numerals:

[0045] 1. Light-shielding drip tube; 2. Light-shielding infusion bag; 3. Infusion needle; 4. Liquid level indicating device; 401. Indication cavity; 402. Diaphragm; 403. Sealed storage body; 404. Release mechanism; 4041. Easy-tear strip; 4042. Tear line; 405. Visible indication area; 4051. Indication paper; 4052. Transparent observation window; 406. Anchoring structure; 407. Guide pipeline. Detailed implementation manners

[0046] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0047] Please refer to Figures 1 - 6 As shown, the specific embodiments provided by the present utility model are as follows:

[0048] As Figures 1 to 5 shown, this embodiment provides a disposable light-shielding infusion set, the core of which is integrated with a liquid level indicating device 4 for indicating the liquid level state of the liquid medicine, especially the state of being about to be exhausted or already exhausted, without affecting the light-shielding effect.

[0049] This disposable light-shielding infusion set mainly includes conventional light-shielding components, such as a light-shielding infusion bag 2 (for containing liquid medicine), a light-shielding infusion pipeline, and a light-shielding drip tube 1, as well as other components, such as a flow rate regulating valve, etc. One end of the light-shielding drip tube 1 is connected to the light-shielding infusion bag 2 through an infusion pipeline, and the other end is connected to the infusion needle 3 (or its interface) through an infusion pipeline. Since these components are made of light-shielding materials, the internal situation of the liquid medicine cannot be directly observed from the outside.

[0050] Based on this, it further includes a liquid level indicating device 4. And specifically includes:

[0051] An indicating cavity 401, which is in communication with the gas phase space of the light-shielding dropper 1. The indicating cavity 401 can be an independent structure arranged outside the light-shielding dropper 1 or partially integrated with it. The indicating cavity 401 is in communication with the gas phase space of the light-shielding dropper 1 (i.e., the gas part above the liquid level in the dropper) through a set communication port or channel. This communication enables the environment inside the indicating cavity 401 to reflect or sense the change in air pressure inside the light-shielding dropper 1, laying the foundation for realizing the liquid level indicating function.

[0052] Wherein, the wall of the indicating cavity 401 is made of an opaque or light-shielding material.

[0053] A diaphragm 402, located inside the indicating cavity 401. The diaphragm 402 is made of a medical-grade polymer material with good flexibility and elasticity. The diaphragm 402 is installed or positioned in the indicating cavity 401 so that it can respond to the pressure change inside the indicating cavity 401 (and thus reflects the gas phase space of the connected light-shielding dropper 1). This diaphragm 402 is the core component of the pressure sensing part in the liquid level indicating device 4, and its subsequent deformation is the basis for triggering the liquid level indicating signal.

[0054] It should be noted that during the infusion process of a disposable light-shielding infusion set, especially when using a common non-vented soft infusion bag, as the liquid medicine in the bag is gradually delivered, due to the continuous downward flow of the liquid without replenishment, and at the same time the soft bag will collapse due to the external atmospheric pressure, which together cause the gas pressure in the upper gas phase space of the light-shielding dropper 1 connected to the infusion bag to decrease significantly, even lower than the external atmospheric pressure, forming a relative negative pressure. One side of the diaphragm 402 in the liquid level indicating device 4 of the present utility model is in communication with this gas phase space to sense the pressure change, while the other side usually corresponds to a relatively stable air pressure. Therefore, when the air pressure in the dropper drops significantly due to the exhaustion of the liquid medicine, a significant pressure difference will be generated between the two sides of the diaphragm 402, and this pressure difference will push the flexible diaphragm 402 to deform inwards towards the dropper connection side with lower pressure. It is precisely by using this depression deformation of the diaphragm 402 driven by the pressure change at the end of infusion to trigger the subsequent indicating substance release mechanism 404, thereby realizing the indication of the liquid level state.

[0055] A sealed storage body 403, which can be embodied as a miniature sealed soft capsule, capsule or similar container structure. A small amount of indicating substance is pre-filled and sealed inside it. The indicating substance (such as a medical-grade colored dye) is used to be released under specific conditions to form a visual mark. The sealed storage body 403 is connected to the diaphragm 402 by fixing, bonding or other reliable means, preferably connected to the surface of the diaphragm 402 away from the light-shielding dropper 1. This connection ensures the fixation of the relative position between the two. Therefore, when the diaphragm 402 deforms and generates displacement in response to pressure changes, the sealed storage body 403 will necessarily move together with the diaphragm 402.

[0056] Specifically, the sealed storage body 403 is a dye capsule, and the indicating substance is a colored dye.

[0057] A release mechanism 404, which cooperates with the sealed storage body 403. Specifically, when the diaphragm 402 deforms due to the air pressure change in the light-shielding dropper 1 and drives the sealed storage body 403 to displace to reach a predetermined trigger condition, the release mechanism 404 can act on the sealed storage body 403, effectively destroying its seal, so as to release the internally stored indicating substance into the indicating cavity 401.

[0058] A visible indication area 405, whose function is to receive and utilize the indicating substance released by the release mechanism 404 to form a visual mark that can be clearly observed by the user outside the indicating device, so as to convey the information that the liquid level of the liquid medicine has reached the preset state, especially that it is about to be exhausted or has been emptied.

[0059] As a specific and simple implementation example, at a predetermined position inside the indicating cavity 401 (for example, on the inner wall or bottom near the indicating substance release point), a small piece of material with good absorption performance (such as medical-grade filter paper or absorbent cotton paper) is fixed or integrated. This material is preferably white or light-colored to provide good contrast. When the indicating substance (such as a colored dye) is released by the release mechanism 404, it will contact and quickly infiltrate this absorbent material, causing a significant change in its color. Whether the user sees that the color of the absorbent material has changed from the initial color (such as white) to the color of the indicating substance (such as red, blue, etc.) can quickly and clearly determine whether the liquid level indicating device 4 has been triggered.

[0060] In a specific embodiment, it further includes an anchoring structure 406 fixed to the inner wall of the indicating cavity 401. The anchoring structure 406 can be a small protrusion, column, hook or other form of fixing feature integrally formed or firmly installed on the inner wall of the indicating cavity 401.

[0061] The key function of this anchoring structure 406 is that it provides a fixed reference point for the sealed reservoir 403 that moves together with the diaphragm 402. Specifically, the anchoring structure 406 is configured (or positioned) in such a state that when the diaphragm 402 deforms due to air pressure changes and drives the sealed reservoir 403 thereon to displace together, and when the moving sealed reservoir 403 reaches a predetermined relative position or generates a sufficient relative displacement amount relative to this fixed anchoring structure 406, this relative movement will trigger or drive the release mechanism 404 to act.

[0062] For example, the release mechanism 404 includes a vulnerable part on the sealed reservoir 403. When the reservoir moves to cause the vulnerable part to come into specific contact (such as impact, scratching) or relative stretching with the anchoring structure 406, the seal is broken;

[0063] Alternatively, the release mechanism 404 may be an independent tiny component. One end of it is associated with the anchoring structure 406, and the other end is associated with the sealed reservoir 403. When the relative displacement between the two reaches a threshold value, this component acts to break the reservoir seal.

[0064] As Figure 6 shown, in a specific embodiment, the release mechanism 404 includes a tear strip 4041. This tear strip 4041 is a key component for realizing the on-demand release of the indicating substance and specifically constitutes a part of the local wall surface of the sealed reservoir 403 or its sealing structure.

[0065] For example, the sealed reservoir 403 can be a microcapsule whose main body is made of a flexible material, and there is an opening or a weak area thereon. The tear strip 4041 can be a thin film or a narrow band, which firmly seals this opening or covers this weak area in the initial state.

[0066] The key is that the tear strip 4041 is also reliably connected to the anchoring structure 406 fixed to the inner wall of the indicating cavity 401. For example, the free end of the tear strip 4041 can be designed as a small loop that is sleeved on the post of the anchoring structure 406; or directly adhered or welded to a specific part of the anchoring structure 406.

[0067] When the diaphragm 402 is recessed and deformed in response to the air pressure change in the light-shielding dropper 1 and drives the sealed reservoir 403 connected thereto to displace relative to the fixed anchoring structure 406 in the indicating cavity 401 (for example, the sealed reservoir 403 moves away from the anchoring structure 406), the tear strip 4041 connected between the anchoring structure 406 and the reservoir sealing part will be gradually tightened.

[0068] As the relative displacement continues to increase, the tensile force applied to the tear strip 4041 also increases. When this tensile force reaches the preset tearing threshold of the tear strip 4041 (which can be controlled by the material, thickness, width, preset tearing line 4042, etc. of the tear strip 4041), the tear strip 4041 will be torn off from the sealed storage body 403 (for example, peeled or torn from the sealed connection), or the tear strip 4041 itself will break.

[0069] Whether the tear strip 4041 is torn off or broken, the result is to destroy the local sealing integrity of the sealed storage body 403, so that the indicating substance originally sealed inside the storage body can be released, enter the indicating cavity 401, and then flow to or contact the visible indicating area 405 to form a mark.

[0070] In a specific embodiment, the tear strip 4041 is provided with a preset tearing line 4042 on its own structure.

[0071] This tearing line 4042 is a structurally characteristic feature set artificially to make the tear strip 4041 more likely to break or be torn off at this location. This kind of tearing line 4042 can take various forms, for example:

[0072] It can be a series of tiny perforations arranged along a predetermined tearing path on the tear strip 4041 (usually in a sheet or strip structure);

[0073] Or it can be an indentation line or a scoring line formed on the surface of the tear strip 4041 by means of stamping, scribing, etc.;

[0074] Or it can be an area where the material thickness of the tear strip 4041 is significantly reduced along a specific path.

[0075] When the tear strip 4041 is subjected to a tensile force, the stress will preferentially concentrate on these tearing lines 4042 with relatively lower strength, thus ensuring that the tear strip 4041 can break along a predetermined path or be torn off from the sealed storage body 403 in an orderly manner. This ensures that the opening state of the storage body is basically the same every time it is triggered.

[0076] By the depth, width, spacing or thinning degree of the tearing line 4042, the magnitude of the tensile force required to break or tear off the tear strip 4041 can be more precisely controlled. This makes the triggering threshold of the release mechanism 404 (i.e., the displacement amount corresponding to the diaphragm 402 / storage body) more stable and reliable.

[0077] In a specific embodiment, in order to convert the indicating substance released by the aforementioned release mechanism 404 into a signal observable by the user, the visible indicating area 405 includes:

[0078] An indicating paper 4051 is provided on the outer surface of the indicating cavity 401, that is, on the outer shell wall of the indicating cavity 401 constituting the liquid level indicating device 4, at a preset and easily observable position, a small piece of indicating paper 4051 is firmly pasted or fixed in other ways. The indicating paper 4051 is usually made of a material with good absorbency and color development properties (such as medical-grade filter paper), and is preferably white or light-colored, so that when a colored indicating substance contacts it, a clear and high-contrast visual mark can be formed.

[0079] In addition, a region for collecting the released indicating substance is provided at the bottom of the indicating cavity 401. Inside the indicating cavity 401, especially in its bottom region, a specific collecting area is provided. This area can be the lowest point naturally formed at the bottom of the cavity, or a small groove or liquid reservoir. Its function is that when the sealed storage body 403 is damaged and the internal indicating substance is released, under the action of gravity, these released indicating substances can flow to and temporarily collect in this bottom region.

[0080] In a specific embodiment, in order to ensure that the indicating substance collected at the inner bottom of the indicating cavity 401 can accurately and effectively reach and act on the indicating paper 4051 provided on the outer surface of the cavity, the liquid level indicating device 4 further includes a guiding pipeline 407.

[0081] The guiding pipeline 407 is an elongated channel, and its main function is to bridge the indicating substance collecting area inside the indicating cavity 401 and the indicating paper 4051 outside the cavity.

[0082] Specifically, the inlet end of the guiding pipeline 407 is connected to the region at the bottom of the indicating cavity 401 for collecting the released indicating substance, ensuring that the indicating substance flowing here can be collected.

[0083] The outlet end of the guiding pipeline 407 extends to the position where the indicating paper 4051 is provided on the outer surface of the indicating cavity 401, and conveys the indicating substance here, enabling it to contact and soak the indicating paper 4051. For example, the pipeline outlet can directly open below or in the central area of the indicating paper 4051.

[0084] The guiding pipeline 407 can have various structural forms, for example:

[0085] It can be a microchannel integrally injection-molded inside or outside the wall of the indicating cavity 401.

[0086] It can also be an independent microtube made of medical-grade material, which is precisely installed and fixed on the indicating cavity 401 during assembly, connecting the internal collecting area and the position of the external indicating paper 4051.

[0087] When the indicator substance is released and collected at the inlet end at the bottom of the cavity, the guide pipe 407 provides a specific path. The indicator substance can be guided and transported through the pipe by capillary action, gravity or the slight pressure generated when the indicator substance is released, and finally reaches the outlet end and soaks the external indicator paper 4051 to form a clear color mark.

[0088] By setting up such a guide pipeline 407, the directional and reliable transmission of the indicator substance from the internal release point to the external display point can be ensured, avoiding the problem of the indicator substance diffusing in the cavity or failing to effectively contact the external indicator paper 4051, thereby improving the reliability and efficiency of the color display of the visible indication area 405.

[0089] In a specific embodiment, in order to further protect the mark displayed on the external indicator paper 4051 and ensure that it can be clearly and reliably observed in various environments, the visible indication area 405 also includes a transparent observation window 4052.

[0090] The transparent observation window 4052 is not an opening for observing the inside of the device in the traditional sense, but refers to a transparent protective film or a thin transparent cover sheet. The transparent protective film / cover sheet is tightly attached to, covers or fixed on the outside of the indicator paper 4051 arranged on the outer surface of the indicator cavity 401.

[0091] Based on this, the indicator paper 4051 on the outer surface of the cavity and the color mark formed by the indicator substance thereon are effectively prevented from being affected by the external environment, such as being touched by fingers, splashed by liquid, dust or other pollutants, and the color mark is prevented from becoming blurred, diffused or erased. The protective layer itself is made of a highly transparent material, which does not affect the user's clear observation of the color state and changes of the indicator paper 4051 below through it.

[0092] In addition, it provides physical protection for the indicator paper 4051 exposed to the outside, thereby improving the wear resistance and overall stability of the indicator area.

[0093] The transparent protective film / cover sheet can be made of medical grade transparent plastic material (such as polyester PET, polypropylene PP, polyethylene PE, etc.), and can be attached by adhesive bonding, hot melting, or fixed to the outer shell of the indication cavity 401 by snap fastening or integral molding, to ensure that it can effectively cover and protect the indication paper 4051 area.

[0094] In the description of the embodiments of the present invention, it needs to be understood that terms such as “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “center”, “top”, “bottom”, “top”, “bottom”, “inside”, “outside”, “inside”, and “outside” indicate orientation or positional relationships.

[0095] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and defined, the terms "installation", "connection", "linkage", and "assembly" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a direct connection, or an indirect connection through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0096] In the description of the embodiments of the present utility model, specific features, structures, materials, or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0097] In the description of the embodiments of the present utility model, it should be understood that "-" and "~" represent the range between two numerical values, and this range includes the endpoints. For example: "A - B" represents the range greater than or equal to A and less than or equal to B. "A ~ B" represents the range greater than or equal to A and less than or equal to B.

[0098] In the description of the embodiments of the present utility model, the term "and / or" herein is merely a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the front and rear associated objects.

[0099] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirits of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A disposable light-proof infusion set, characterized in that: include: A light-proof dropper, one end of which is connected to a light-proof infusion bag, and the other end is connected to an infusion needle; A liquid level indicating device, cooperating with the light-proof dropper, for indicating the liquid level status of the medicine solution in the light-proof infusion device; Wherein, the liquid level indicating device comprises: an indicating cavity, connected to the gas phase space of the light-proof dropper; a diaphragm, the diaphragm being located in the indicating cavity and capable of being deformed to be concave toward one side of the light-proof dropper in response to the change of air pressure in the light-proof dropper; a sealed reservoir containing an indicator substance, the sealed reservoir being connected to the diaphragm and moving therewith; a release mechanism, the release mechanism cooperates with the sealed storage body, and is used to destroy the seal of the sealed storage body to release the indicator substance when the diaphragm is deformed and drives the sealed storage body to move; A visible indication area is used to form an externally visible mark after the indicator substance is released.

2. The disposable light-proof infusion set according to claim 1, characterized in that: The liquid level indicating device also includes: an anchoring structure fixed to the inner wall of the indication cavity; The anchoring structure is configured such that when the sealing reservoir is displaced relative to the anchoring structure as the diaphragm moves, the release mechanism acts on the sealing reservoir to destroy the seal thereof.

3. The disposable light-proof infusion set according to claim 2, characterized in that: The release mechanism comprises: An easy-tear strip, the easy-tear strip defines a partial wall surface of the sealed storage body; Furthermore, the tear strip is connected to the anchoring structure; Wherein, when the sealing storage body is displaced relative to the anchoring structure, the tear strip is torn off from the sealing storage body.

4. The disposable light-proof infusion set according to claim 3, characterized in that: The tear strip is provided with a preset tear line; The tear line is configured such that when the sealing storage body is displaced relative to the anchoring structure, the tear strip can be controllably torn off from the sealing storage body.

5. The disposable light-proof infusion set according to claim 2, characterized in that: The anchoring structure is a structure integrally formed on the inner wall of the indication cavity; Wherein, the anchoring structure is a convex column, a hook-shaped structure, or a through hole or a slit for fixing the release mechanism.

6. The disposable light-proof infusion set according to claim 1, characterized in that: The sealed storage body is a dye capsule, and the indicator substance is a colored dye.

7. The disposable light-proof infusion set according to claim 1, characterized in that: The visible indication area includes: An indicator paper is arranged on the outer surface of the indicator cavity, and the bottom of the indicator cavity is provided with an area for collecting the released indicator substance.

8. The disposable light-proof infusion set according to claim 7, characterized in that: The liquid level indicating device also includes: A guide pipeline is connected to the area at the bottom of the indicator cavity where the released indicator substance is collected and the indicator paper, and is used to guide the indicator substance to the indicator paper.

9. The disposable light-proof infusion set according to claim 8, characterized in that: The visible indication area includes: A transparent observation window is provided, and the indicator paper is located in the transparent observation window.

10. The disposable light-proof infusion set according to any one of claims 1 to 9, characterized in that: The wall of the indicating cavity is made of an opaque material or a material having a light-shielding property.

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