Precise needle double-air-passing filter

Abstract

The utility model discloses a precise needle head double-air-passing filter which comprises an upper shell, a lower shell and a protective cap, the upper shell is arranged on the lower shell, and the protective cap is detachably arranged on the upper shell; the upper shell is provided with a bolt part, a first flow channel, a first exhaust hole and a first half cavity; the lower shell is provided with a nipple, a second flow channel, a second exhaust hole and a second half cavity; the novel needle head double-air-passing filter has the advantages that the use is convenient, the manufacturing cost is low, the exhaust time before injection is shortened, the bidirectional air passing function is achieved, the contradiction between medical care and patients is reduced, the service satisfaction degree of the medical care personnel is improved, the time for the medical care personnel to inject and rescue the patients is saved, and whether air exists after injection or not is not worried. In addition, a direct fixing method is adopted to change a traditional hot welding film fixing method, so that the physical and chemical characteristics of the film are kept, and the production cost is saved while the gas passing function is better realized.

Description

Technical Field

[0001] The utility model relates to a medical instrument, in particular to a precision needle double air filter. Background Art

[0002] Injection therapy includes intravenous administration, which includes intravenous infusion and intravenous injection. A syringe or infusion set must be used for intravenous administration. During the drug administration filtration process, if the injection liquid is not completely exhausted, the gas will enter the human body as a foreign body. The gas will form an air embolism after entering the human body. Although a small amount can be absorbed, the absorption rate is related to the health status of the human body. When the patient sees gas entering the rubber tube of the scalp needle, he will report it to the medical staff, and even point at the gas to tell the medical staff. The medical staff can only explain that the small amount of gas will not affect it, which seriously affects the satisfaction of medical care and causes trouble to medical staff and patients. The medical staff has already eliminated the gas. Why are there small bubbles after the injection is successful? This is an actual problem in clinical practice. Patients will think that after a small amount of bubbles enter their bodies, will it cause certain diseases? On the other hand, the bubbles may contain certain particles or bacteria, and the exhaust before injection increases the preparation work before administration, which also seriously affects the rescue work time. Air pollution is one of the important problems currently facing clinical drug administration. At present, there are many patents related to anti-particle filter syringes, but they have not been put into production or clinical use. The main reasons are that the manufacturing process is complicated or inconvenient to use, or it is still in the research and development stage. Any injection method needs to remove the air in the syringe before injection, but sometimes the air will remain in the needle stem. After the injection is successful, a small amount of gas will enter the human body along with the liquid in the rubber tube of the scalp needle. This is a very important and obvious problem. On the other hand, because the existing precision infusion device is expensive, it increases the medical cost and medical treatment cost, especially for patients with long hospitalization time and critical condition. The economic pressure will increase accordingly. The precision of the infusion device is mainly reflected in the pore size and exhaust function of the drip pot filter membrane and the ability to adjust the number of drops. Regardless of Whether the drip pot has an exhaust function or not, it cannot solve the problem of tiny or multiple tiny bubbles generated when the needle is replaced before injection. Whether it is intravenous infusion or intravenous injection, tiny bubbles may enter the human body. The infusion set itself has a filter membrane, and the number of drops can be adjusted using an intravenous infusion pump without increasing the cost. The syringe does not have a gas permeation function. In addition, the air filter membrane on the market is currently referred to as a gas permeation membrane. The air membrane is welded to the shell by heat welding. The physical and chemical properties of the membrane will change after high-temperature welding. For example, heat can affect the gas permeability of the membrane. The utility model adopts a new membrane fixing structure, which can reduce the process flow without being affected by heat, saving production and labor costs. Therefore, the application proposes a precision needle double gas permeation filter. Utility Model Content

[0003] The purpose of the utility model is to solve the problem that the above-mentioned syringe or infusion set has no needle and double air filter and gas will form air embolism after entering the human body. If there is air leakage in the infusion pipeline during infusion and it cannot be discovered in time, a large amount of gas will enter the body, causing air embolism and endangering the patient's life. The entry of bubbles will cause conflicts between doctors and patients and nurses and patients. Exhausting air before injection affects the working time of medical staff and the progress of rescue. The air in the liquid medicine will cause serious complications, such as air embolism, which may endanger the patient's life safety. The use of the utility model device can save medical and medical costs. At the same time, it is easy to use, cheap, does not affect the technical process of intravenous drug administration, and does not increase pre-use training because it must be changed before intravenous drug administration. Pull out the needle for dispensing medicine and replace it with a scalp needle for injection. Our needle double air filter is a scalp needle with double air function. Normal or incomplete exhaust before injection saves a lot of preparation time before medication and time to rescue patients. There is no need to worry about whether there is air after injection, which improves the service of medical staff and the satisfaction of patients. This utility model patent has the upper and lower hole air function, so when using it, there is no need to consider whether the air surface is placed upward to cause changes in operating technology. In addition, because the direct fixing method is used to change the traditional hot welding method of fixing the membrane, the physical and chemical properties of the membrane are maintained, and the air function is better realized while saving production costs, thereby providing a precision needle double air filter.

[0004] A precision needle double air filter comprises an upper shell, a lower shell and a protective cap, wherein the upper shell is arranged on the lower shell, and the protective cap is detachably arranged on the upper shell;

[0005] The upper shell is provided with a bolt portion, a first flow channel, a first exhaust hole, and a first half cavity;

[0006] The lower shell is provided with a nipple, a second flow channel, a second exhaust hole, and a second half cavity;

[0007] The plug portion is connected to the syringe, the nipple is connected to the scalp needle, the first half chamber and the second half chamber form a complete chamber, the first flow channel connects the first half chamber with the syringe, the second flow channel connects the scalp needle with the second half chamber, a first exhaust hole is provided on the inner wall of the first half chamber close to the plug portion, the first exhaust hole connects the first half chamber with the atmosphere, the first exhaust hole is located on one side of the first half chamber and a first air permeable membrane is provided, a second exhaust hole is provided on the inner wall of the second half chamber close to the nipple, the second exhaust hole connects the second half chamber with the atmosphere, the second exhaust hole is located on one side of the second half chamber and a second air permeable membrane is provided.

[0008] A plurality of second fixing columns are evenly distributed in a ring at positions on the inner wall of the second half cavity corresponding to the first exhaust hole, and the first air permeation membrane is squeezed and fixed by the plurality of second fixing columns evenly distributed in a ring. A plurality of first fixing columns are evenly distributed in a ring at positions on the inner wall of the first half cavity corresponding to the second exhaust hole, and the second air permeation membrane is squeezed and fixed by the plurality of first fixing columns evenly distributed in a ring.

[0009] Beneficial effects of the utility model:

[0010] The utility model is easy to use, inexpensive, reduces the exhaust time before injection, has a two-way air-passing function, reduces the conflicts between doctors and patients, improves the service satisfaction of medical staff, saves the time of medical staff before injection and rescuing patients, and does not need to worry about whether there is air after injection. It is a new type of needle double air-passing filter. In addition, because the traditional method of fixing the membrane with heat welding is changed by adopting a direct fixing method, the physical and chemical properties of the membrane are maintained, the air-passing function is better realized and the production cost is saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0012] Figure 2 It is a top view of the utility model;

[0013] Figure 3 This utility model Figure 2 Center AA section view. DETAILED DESCRIPTION

[0014] See also Figures 1 to 3 As shown, a precision needle double air filter comprises an upper shell 1, a lower shell 2 and a protective cap 3, wherein the upper shell 1 is arranged on the lower shell 2, and the protective cap 3 is detachably arranged on the upper shell 1;

[0015] Specifically, the upper shell 1 and the lower shell 2 are bonded together to form a whole, and the protective cap 3 prevents dust from entering the upper shell 1 and the lower shell 2, playing a role in preventing pollution. The material used for the upper shell 1 and the lower shell 2 is a transparent material, which is convenient for observing the internal situation;

[0016] The upper shell 1 is provided with a bolt portion 11, a first flow channel 12, a first exhaust hole 13, a first half cavity 14 and a plurality of first fixing columns 15;

[0017] The lower shell 2 is provided with a nipple 21, a second flow channel 22, a second exhaust hole 23, a second half cavity 24 and a plurality of second fixing columns 25;

[0018] The plug portion 11 is connected to the syringe, the nipple 21 is connected to the scalp needle, the first half chamber 14 and the second half chamber 24 form a complete chamber, the first flow channel 12 connects the first half chamber 14 with the syringe, the second flow channel 22 connects the scalp needle with the second half chamber 24, a first exhaust hole 13 is provided on the inner wall of the first half chamber 14 on the side close to the plug portion 11, the first exhaust hole 13 connects the first half chamber 14 with the atmosphere, the first exhaust hole 13 is located on one side of the first half chamber 14 and a first air permeation membrane 4 is provided, a second exhaust hole 23 is provided on the inner wall of the second half chamber 24 on the side close to the nipple 21, the second exhaust hole 23 connects the second half chamber 24 with the atmosphere, the second exhaust hole 23 is located on one side of the second half chamber 24 and a second air permeation membrane 5 is provided;

[0019] A plurality of second fixing columns 25 are evenly distributed in an annular pattern on the inner wall of the second half cavity 24 at positions corresponding to the first exhaust holes 13, and the first air permeation membrane 4 is pressed and fixed by the evenly distributed second fixing columns 25. A plurality of first fixing columns 15 are evenly distributed in an annular pattern on the inner wall of the first half cavity 14 at positions corresponding to the second exhaust holes 23, and the second air permeation membrane 5 is pressed and fixed by the evenly distributed first fixing columns 15.

[0020] Specifically, the device can be integrated with the scalp needle during actual production, or it can be disassembled from the scalp needle into two detachable parts. The drug solution enters the chamber formed by the first half chamber 14 and the second half chamber 24 through the first flow channel 12 through the syringe, and the gas in the drug solution passes through the first air permeation membrane 4 and the second air permeation membrane 5 through the first exhaust hole 13 and the second exhaust hole 23 from the chamber into the atmosphere. The drug solution after exhausting the gas enters the scalp needle through the second flow channel 22 and is then injected into the patient's body, wherein the first air permeation membrane 4 and the second air permeation membrane 5 are hydrophobic PTFE breathable membranes for exhausting air. The hydrophobic PTFE breathable membrane is a prior art. The first air permeation membrane 4 and the second air permeation membrane 5 are squeezed and fixed on the inner walls of the first half chamber 14 and the second half chamber 24 by the annularly arranged second fixing column 25 and the first fixing column 15 to cover the first exhaust hole 13 and the second exhaust hole 23. The second fixing column 25 and the first fixing column 15 squeeze the first air permeation membrane 4 and the second air permeation membrane 5 tightly, and the drug solution will not leak out.

[0021] Working principle and process of this utility model:

[0022] See also Figures 1 to 3As shown, when in use, the drug solution is first drawn into the injection, and then the device is taken out, and the plug part 11 is connected to the syringe nipple. In actual production, the device can be integrated with the scalp needle as a whole, and can also be disassembled into two detachable and installable parts with the scalp needle. The syringe piston is pressed, and the drug solution passes through the syringe through the first flow channel 12 into the chamber formed by the first half chamber 14 and the second half chamber 24. The gas mixed in the drug solution will pass through the first air permeation membrane 4 and the second air permeation membrane 5 through the first exhaust hole 13 and the second exhaust hole 23 from the chamber to the atmosphere. The drug solution after exhausting the gas enters the scalp needle through the second flow channel 22 and is injected into the patient's body.

Claims

1. A precision needle double air filter, characterized by: The invention comprises an upper shell (1), a lower shell (2) and a protective cap (3), wherein the upper shell (1) is arranged on the lower shell (2), and the protective cap (3) is detachably arranged on the upper shell (1); The upper shell (1) is provided with a bolt portion (11), a first flow channel (12), a first exhaust hole (13), and a first half chamber (14); The lower shell (2) is provided with a nipple (21), a second flow channel (22), a second exhaust hole (23), and a second half cavity (24); The plug portion (11) is connected to the syringe, and the nipple (21) is connected to the scalp needle. The first half chamber (14) and the second half chamber (24) form a complete chamber. The first flow channel (12) connects the first half chamber (14) and the syringe, and the second flow channel (22) connects the scalp needle and the second half chamber (24). A first exhaust hole (13) is provided on the inner wall of the first half chamber (14) on a side close to the plug portion (11). The first exhaust hole (13) connects the first half chamber (14) with the atmosphere. The first exhaust hole (13) is located on one side of the first half chamber (14) and is provided with a first air permeation membrane (4). A second exhaust hole (23) is provided on the inner wall of the second half chamber (24) on a side close to the nipple (21). The second exhaust hole (23) connects the second half chamber (24) with the atmosphere. The second exhaust hole (23) is located on one side of the second half chamber (24) and is provided with a second air permeation membrane (5).

2. A precision needle double air filter according to claim 1, characterized in that: A plurality of second fixing columns (25) are evenly distributed in a ring shape at positions on the inner wall of the second half chamber (24) corresponding to the first exhaust hole (13), and the first air permeation membrane (4) is pressed and fixed by the plurality of second fixing columns (25) evenly distributed in a ring shape. A plurality of first fixing columns (15) are evenly distributed in a ring shape at positions on the inner wall of the first half chamber (14) corresponding to the second exhaust hole (23), and the second air permeation membrane (5) is pressed and fixed by the plurality of first fixing columns (15) evenly distributed in a ring shape.

Images