Exhaust cap for exhausting air at tail end of infusion apparatus

Abstract

The utility model relates to an exhaust cap for exhausting air at the tail end of an infusion apparatus, and belongs to a medical instrument accessory. The water-proof and air-permeable connector comprises a tubular body, a water-proof and air-permeable material structure is arranged in an inner hole of the body, and a spiral positioning structure is arranged on the outer surface of an input port of the body. When in use, the device is generally connected to the output end of a filter in an infusion apparatus. During operation, liquid medicine of an infusion apparatus can automatically flow into the exhaust cap at the tail end from top to bottom to stop, and redundant gas can be exhausted through the exhaust cap, so that the time of manual exhaust of nurses is saved, waste of the liquid medicine is avoided, and the safety of infusion operation is improved. After exhausting is completed, normal infusion can be achieved by unscrewing the exhaust cap to be connected with the remaining needle, and operation is simple.

Description

Technical Field

[0001] The utility model discloses an exhaust cap used for exhausting the end of an infusion set, belonging to a medical device accessory. Background Art

[0002] At present, hospitals use infusion sets to infuse drugs. Since ordinary infusion sets do not have self-exhausting protective caps at the end, nurses will exhaust air when performing infusion operations, and the drug solution will be discharged from the end of the infusion set, causing drug leakage and waste. At the same time, environmental microorganisms and fine particles in the ward will come into contact with the drug solution, causing pollution. Drug leakage will cause drug aerosols in the ward environment, threatening the health of medical staff, patients, accompanying personnel and other personnel in the ward. Especially when infusing chemotherapy drugs, if they accidentally come into contact with the skin, it will cause burning, stinging, rash, and even lead to ulceration, limb disability, etc. Summary of the invention

[0003] The utility model aims to design an exhaust cap for exhausting the gas at the end of an infusion set which can automatically exhaust the gas in the infusion set.

[0004] The utility model comprises a tubular body, a waterproof and breathable material structure is arranged in the inner hole of the body, and a spiral positioning structure is arranged on the outer surface of the input port of the body.

[0005] Specifically, the waterproof and breathable material structure includes an exhaust membrane, an annular step surface facing the input end is arranged in the inner hole of the body, and the periphery of the exhaust membrane is fixedly connected to the fixed annular step surface.

[0006] Specifically, the waterproof and breathable material structure includes a vent plug made of water-swellable rubber, an annular step surface facing the input end is arranged in the inner hole of the body, and the vent plug is fixed on one side of the annular step surface adjacent to the input end.

[0007] Furthermore, the annular step surface is formed by an inner protruding ring in the inner hole of the main body.

[0008] Furthermore, the spiral positioning structure is composed of at least two spiral positioning blocks on the periphery, and the surface of each spiral positioning block facing the output end is a same spiral surface along the circumferential direction.

[0009] Furthermore, the outer surface of the body is a conical surface with a small output end and a large input end.

[0010] Furthermore, the outer surface of the main body is provided with concave-convex anti-slip patterns.

[0011] The utility model is generally connected to the filter output end of the infusion set when in use. During operation, the liquid medicine of the infusion set will automatically flow from top to bottom into the exhaust cap at the end and stop, and the excess gas will be discharged through the exhaust cap, thereby saving the nurse's time for manual exhaust, avoiding the waste of liquid medicine, and improving the safety of infusion operation. After the exhaust is completed, the exhaust cap can be unscrewed and the indwelling needle can be connected to perform normal infusion, which is simple to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional diagram of Embodiment 1 and Embodiment 2 of the present utility model;

[0013] Figure 2 is a top view of Example 1;

[0014] Figure 3 is a cross-sectional view of Example 1;

[0015] Figure 4 is a cross-sectional view of Example 2;

[0016] Figure 5 It is a schematic diagram of assembly when using Example 1 or Example 2;

[0017] Among them, 1. exhaust hole, 2. anti-slip pattern, 3. main body, 4. spiral positioning block, 5. inner protruding ring, 6. exhaust plug, 7. liquid medicine hole, 8. exhaust membrane, 9. filter, 10. embodiment 1 or embodiment 2. DETAILED DESCRIPTION

[0018] Unless otherwise specified, the directions such as up, down, left, right, front, back, inside and outside in this application document are based on the present embodiment. Figure 3 or Figure 4 The up, down, left, right, front, back, inside and outside directions shown in the figure shall prevail and are explained here together. Example

[0019] As shown in the figure, this embodiment includes a body 3, which is a tubular structure, and its outer surface is generally a tapered tube with a small output end and a large input end.

[0020] An inner protruding ring 5 is provided in the middle of the inner hole of the body 3, and at least the lower surface of the inner protruding ring 5, that is, the surface on one side facing the input end, is a plane. An exhaust plug 6 is provided below the inner protruding ring 5, and the exhaust plug 6 is made of water-swelling rubber. The exhaust plug 6 is installed below the inner protruding ring 5 through an interference fit with the inner hole wall of the body 3, that is, the exhaust plug 6 is located between the inner protruding ring 5 and the input end of the body 3, so that the exhaust plug 6 forms a structure that is sealed to liquid and open to gas.

[0021] The inner hole of the body 3 separated by the inner protruding ring 5 forms a liquid medicine hole 7 on one side near the input end, and forms an exhaust hole 1 on the side near the output end. This structure is easy to process, and also minimizes the amount of raw materials, reduces the weight of the product, reduces the production cost, and reduces waste.

[0022] In this embodiment, the upper part of the outer surface of the main body 3 is provided with anti-slip grooves 2 to facilitate operation and further reduce the amount of raw materials.

[0023] Two spiral positioning blocks 4 are arranged along the circumference of the lower part of the outer surface of the body 3, and one side surface of each spiral positioning block 4 is flush with the lower bottom surface of the body 3, and the surface facing the output end is the same spiral surface along the circumference. The spiral positioning block 4 is used to connect with the liquid filter or other parts in the infusion set when in use.

[0024] In actual production, the number of spiral positioning blocks is not limited to two, and may be more than two. Example

[0025] As shown in the figure, this embodiment includes a main body 3, which is a tubular structure, an inner hole of which is provided with an inner protruding ring 5, and an outer surface of which is provided with a spiral positioning block 4 and an anti-slip pattern 2. These structures are the same as those in embodiment 1 and will not be repeated here.

[0026] The present embodiment is different from the embodiment 1 in that an exhaust membrane 8 is provided in the inner hole of the body 3 and at the lower surface of the inner protruding ring 5, and the periphery of the exhaust membrane 8 is fixedly connected to the lower surface of the inner protruding ring 5 by welding or the like. The exhaust membrane 8 can be made of PTFE material.

Claims

1. An exhaust cap for exhausting the end of an infusion set, characterized by: It includes a tubular body, a waterproof and breathable material structure is arranged in the inner hole of the body, and a spiral positioning structure is arranged on the outer surface of the input port of the body; the waterproof and breathable material structure includes an exhaust membrane, an annular step surface facing the input end is arranged in the inner hole of the body, and the periphery of the exhaust membrane is fixedly connected to the fixed annular step surface; the waterproof and breathable material structure includes an exhaust plug made of water-absorbing and swelling rubber, an annular step surface facing the input end is arranged in the inner hole of the body, and the exhaust plug is fixed on the side of the annular step surface adjacent to the input end; the spiral positioning structure is at least two spiral positioning blocks on the periphery, and the surface of each spiral positioning block facing the output end is the same spiral surface along the circumferential direction.

2. The exhaust cap for exhausting the end of an infusion set according to claim 1 is characterized by: The annular step surface is formed by an inner protruding ring in the inner hole of the main body.

3. The exhaust cap for exhausting the end of an infusion set according to claim 1 or 2, characterized in that: The outer surface of the body is a cone with a small output end and a large input end.

4. The exhaust cap for exhausting the end of an infusion set according to claim 1 or 2, characterized in that: The outer surface of the main body is provided with concave-convex anti-slip patterns.

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