CN218944058U - Injector for preparing mixed medicine - Google Patents

Abstract

The utility model relates to the technical field of medical appliances, in particular to an injector for preparing mixed medicines, wherein a piston of the injector is hollow and cylindrical, one end of the piston is airtight, the other end of the piston is open, the airtight end of the piston is an airtight rubber soft plug, and the injector can be directly sleeved into a common injector when in use, so that the operation of taking down a needle head is avoided, the pollution rate of liquid medicine can be effectively reduced, the occurrence of needle puncture is reduced, and the clinical working efficiency is improved.

Description

Injector for preparing mixed medicine

Technical Field

The utility model relates to the technical field of medical appliances, in particular to a syringe for preparing mixed medicines.

Background

The preparation of the intravenous medicaments is an indispensable work of each clinical department, and the preparation of the mixed medicaments is also a common requirement in the intravenous medicament preparation process. The preparation of the mixed medicine is that two or more medicines are mixed in an empty needle to be added into other liquid medicine, and the medicine compatibility principle is not met; taking the fat emulsion and fat-soluble vitamin in NICU nutrient solution preparation as an example: the fat milk and fat-soluble vitamins are extracted into an empty needle, respectively, and fat-soluble vitamins are added into the syringe filled with fat milk from the syringe filled with fat-soluble vitamins, and then the mixture is injected into the prepared liquid medicine. In the preparation process, the needle head filled with fat emulsion needs to be taken down, the other hand is required to clamp the needle head and hold the other syringe filled with fat-soluble vitamin to charge the medicine inwards, the whole process easily contaminates the hollow needle nipple and the needle head, so that the liquid medicine is polluted, and the polluted liquid medicine can possibly cause blood infection of an infant if being infused into the body of the infant, thereby causing bacteremia, septicemia and the like of the infant, threatening the life safety of the infant and increasing medical disputes. Secondly, the needle point with the fat-soluble vitamin is aligned to the empty needle nipple with the needle removed for injection, and the empty needle nipple is generally smaller, so that the problem of misalignment and difficult sleeving is easily caused, and the needle puncture accident is easily caused.

Disclosure of Invention

The utility model aims at: aiming at the problems that in the prior art, in the process of preparing the mixed medicine, a needle head of one syringe is required to be taken down, the needle head of the other syringe is aligned to an empty needle nipple sleeved on the taken down needle head for injection, and the probability of medicine pollution is high, the syringe for preparing the mixed medicine is provided.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

the injector for mixed medicine preparation includes syringe and piston matched with the syringe, the piston has hollow cylindrical structure with one end sealed and the other end opened, and the sealed end of the piston may be pierced with other injector.

According to the utility model, the cross solid structure of the piston in the original hollow needle structure is improved to be a hollow cylindrical structure, the containing cavity for containing the medicine is formed between the closed end of the piston and the extraction end of the needle cylinder, and when the medicine is added and mixed, the medicine is directly injected through puncturing from the reserved position of the closed end of the piston, and the needle head of the liquid medicine injector to be added is not required to be taken down, so that the frequency of contacting the needle head of the injector can be reduced, the probability of polluting the liquid medicine is reduced, and the safety of children is protected.

The sealing end of the piston can be arranged at the front end (the needle head setting end is the front end) or the rear end, and the piston can prevent liquid leakage and simultaneously can slide along the needle cylinder.

Preferably, the airtight end of the piston is provided with a rubber soft plug, so that the labor is saved, and the piston is simple and effective.

Optionally, the closed end of the piston can also be closed by adopting hard materials, holes which are easy to punch are reserved at appropriate positions correspondingly, and flexible materials such as plastic or tinfoil paper or detachable members are adopted at the holes for temporary sealing.

Preferably, the piston is adapted to the shape and size of the cylinder.

Preferably, the closed end of the piston is arranged close to the injection direction of the needle cylinder relative to the open end, and the suction is labor-saving. The interior space of the piston is correspondingly reserved with the position needed to be added into the mixed medicine syringe.

Further, the opening end of the piston is provided with a layer of film, the film is used for temporarily closing the opening, the sealing end of the piston is prevented from being polluted in a conventional storage state, the probability of drug pollution is reduced, and the small-size injector is poked through the film layer and pierces the sealing end of the piston for injection when in use. The film can be made of plastic material, paper sheet or tinfoil.

Preferably, the piston extends out of the needle cylinder, the outer edge of the extending end of the piston is provided with a clip, and the clip protrudes out of the inner wall of the needle cylinder. The arrangement of the clamp is convenient for holding the suction action, and can limit the position of the needle cylinder and the small-size injector.

Preferably, the cross-sectional shape of the cylinder of the piston is circular, rectangular or triangular, among other geometric shapes, and is not limited to its cross-sectional shape.

In summary, due to the adoption of the technical scheme, the beneficial effects of the utility model are as follows:

1. according to the utility model, the cross solid structure of the piston in the original hollow needle structure is improved to be a hollow cylindrical structure, and when medicines are added and mixed, the medicines are directly injected through the sealed end of the piston, so that the needle head of a liquid medicine injector to be added is not required to be taken down, the number of times of contacting the needle head of the injector is reduced, the probability of polluting the liquid medicine is reduced, and the safety of children patients is protected.

2. According to the utility model, the cross solid structure of the piston in the original hollow needle structure is improved into a hollow cylindrical structure, the hollow needle (injector) is sleeved with the hollow piston cylindrical structure, and injection is completed, so that the utility model is easy, labor-saving and quick, avoids the problems of misalignment and difficult sleeve, effectively avoids the occurrence of needle puncture injury, and promotes clinical safety.

3. The utility model only changes the structure of the injector piston, has low cost, is simple and convenient to combine and easy to operate by combining with the common hollow needle, reduces the times of reversing the needle head and the liquid medicine, and accelerates the working efficiency; meanwhile, the liquid medicine pollution is reduced, the reformulation is avoided, the resource waste is reduced, the operation is simple and convenient, and the practicability is strong.

Drawings

FIG. 1 is a schematic diagram of the structure of a syringe for mixed drug formulation in example 1.

Fig. 2 is a schematic diagram showing the process of the combined use state of the injector.

Fig. 3 is a schematic structural diagram of a syringe for mixed drug formulation in example 2.

Icon: 1-a needle cylinder; 2-a piston; 2A-closed end; 2B-an open end; 2C-rubber cork; 3-clip.

Detailed Description

The present utility model will be described in detail with reference to the accompanying drawings.

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

Example 1

An injector for preparing mixed medicines is used for uniformly preparing medicines in clinic. As shown in fig. 1 and 2, the injector comprises a needle cylinder 1 and a piston 2 matched with the needle cylinder 1, wherein the piston 2 is of a hollow cylinder structure with one end closed and the other end open, the cylinder body of the piston 2 is matched with the needle cylinder 1 in shape and size, and the closed end 2A of the piston 2 is arranged towards the front end of the needle cylinder 1 (the needle end of the injector is the front), so that the closed end is prevented from contacting the outside, and the pollution probability is reduced; the hollow structure of the piston 2 reserves the position of the hollow needle for adding the mixed medicine for the common small-size injector to be sleeved in. Specifically, a closed end 2A of the piston 2 is integrally provided with a closed rubber soft plug 2C, a small-sized injector is sleeved into the piston 2 when mixed medicines are added, and the rubber head of the piston 2 is directly pierced from a reserved position of the piston 2 for medicine injection; when the mixed medicine is injected into the matched medicine liquid, the residual small holes on the rubber head of the piston 2 can not influence the effective pushing of the piston 2 on the mixed medicine or the influence of the effective pushing on the piston on the mixed medicine is negligible.

Further, the free end of the piston 2 extends out of the needle cylinder 1, the outer edge of the extending end of the piston 2 is provided with a clip 3, and the clip 3 protrudes out of the inner wall of the needle cylinder 1. The clip 3 is arranged to facilitate the hand-held suction action and limit the position of the syringe 1 and the small-size injector.

In this embodiment, the piston 2 of the syringe 1 is in a hollow cylinder shape, so that a common hollow needle can be easily sleeved in a clinic, and the pain point of the traditional hollow needle, which is caused by taking down one end of the needle head to perform mixed injection, can be avoided by combining the hollow needle with the common hollow needle, and the problems of medicine pollution and the like caused by repeatedly sleeving the needle head can be effectively avoided. The structure is simple and convenient to combine, is easy to operate, and greatly reduces the clinical dispensing time.

Example 2

Based on embodiment 1, in order to further reduce the probability of drug contamination, a layer of film can be provided at the open end 2B of the piston 2 for temporarily closing the opening, so as to avoid contamination of the sealed end of the piston in a conventional storage state, thereby reducing the probability of drug contamination. The film can be made of plastic material, paper sheet or tinfoil.

Example 3

Compared to example 1, this example provides other embodiments: the piston 2 in the embodiment 1 may also be disposed upside down, as shown in fig. 3, i.e. the opening end 2B of the piston 2 is disposed forward, the closed end 2A of the piston 2 extends out of the syringe 1, and a containing cavity for containing medicine is formed between the closed end 2A of the piston 2 and the extracting end of the syringe 1, i.e. the hollow cylinder of the piston 2 is communicated with the cylinder of the syringe 1, so that medicine can be injected through the puncture of the closed end 2A for mixing and preparation, and the tedious steps of taking down the needle head of one syringe and aligning and sleeving the needle tip of another syringe with the hollow nipple are avoided.

Example 4

Based on embodiment 1, 2 or 3, as another embodiment, the piston may further comprise a cylindrical body and a vacuum chuck integrally provided at an end of the cylindrical body, the vacuum chuck is used for hermetically connecting the cylindrical body and an inner wall of the syringe to realize the pumping action, a gap may be properly left between the cylindrical body and the inner wall of the syringe, and only the vacuum chuck slides along the inner wall of the syringe, so that pumping resistance is smaller. The cross section of the cylindrical body is not limited to be round, but can be rectangular, triangular and other geometric shapes, and can be the same as or different from the shape of the syringe body.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (8)

1. The injector for mixed medicine preparation comprises a needle cylinder (1) and a piston (2) matched with the needle cylinder (1), and is characterized in that the piston (2) is of a hollow cylindrical structure with one end being closed and the other end being open, and the closed end (2A) of the piston (2) can be used for penetration of another injector.

2. Syringe for mixed drug formulation according to claim 1, characterized in that the closed end (2A) of the piston (2) is provided with a rubber bung (2C).

3. Injector for mixed pharmaceutical formulations according to claim 1, characterized in that the barrel of the piston (2) is adapted to the shape, size of the needle cylinder (1).

4. Injector for mixed pharmaceutical formulations according to claim 1, characterized in that the closed end (2A) of the piston (2) is arranged opposite the open end (2B) towards the injection direction of the needle cylinder (1).

5. Syringe for mixed drug formulation according to claim 4, characterized in that the open end (2B) of the piston (2) is provided with a membrane for temporarily closing the opening.

6. The syringe of claim 5, wherein the film is tinfoil.

7. Injector for mixed pharmaceutical formulations according to any of claims 1-6, characterized in that the piston (2) protrudes from the barrel (1), the outer edge of the protruding end of the piston (2) being provided with a catch (3), the catch (3) protruding from the inner wall of the barrel (1).

8. Syringe for mixed pharmaceutical formulation according to any of claims 1-6, characterized in that the cross-sectional shape of the barrel of the piston (2) is circular, rectangular or triangular.

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