CN113397975B

CN113397975B - A nested reconstitution device

Info

Publication number: CN113397975B
Application number: CN202110855625.6A
Authority: CN
Inventors: 吴力群
Original assignee: Hangzhou Qiantang Longyue Biotechnology Co ltd
Current assignee: Hangzhou Qiantang Longyue Biotechnology Co ltd
Priority date: 2021-07-28
Filing date: 2021-07-28
Publication date: 2024-11-22
Anticipated expiration: 2041-07-28
Also published as: CN113397975A

Abstract

The present invention provides a nested reconstitution device, comprising a tubular inner needle and an outer needle, wherein the inner needle is provided with an inner needle head, an inner needle body, a limiting portion, and an inner needle seat connected to a syringe in sequence, and the inner cavity of the inner needle forms an inner liquid inlet passage penetrating the inner needle head, the inner needle body, the limiting portion, and the inner needle seat, and the diameter of the limiting portion is greater than the diameter of the inner needle body; the outer needle is provided with an outer needle head, an outer needle body, and an outer needle seat in sequence, and the inner cavity of the outer needle forms an outer liquid inlet passage penetrating the outer needle head and the outer needle body; the outer needle seat is tightly sleeved on the outer side of the inner needle, and the outer liquid inlet passage is connected to the inner liquid inlet passage. When the inner needle and the outer needle are sleeved together, they can be used to extract liquid medicine from an ampoule bottle. After removing the outer needle, the inner needle can conveniently puncture the syringe bottle, inject and extract liquid medicine, and complete the dispensing. The present invention can complete the dispensing process without replacing the dispensing needle, is easy to use, has good effects, and is conducive to promotion.

Description

Nested type redissolution device

Technical Field

The invention relates to the field of medical instruments, in particular to a nested reconstitution device.

Background

The ampoule bottle is a sealed high-quality glass small bottle which is commonly used for storing medicines for injection, vaccines, serum and the like, the ampoule bottle is sealed integrally, the upper part of the ampoule bottle is required to be broken when the ampoule bottle is used, and a needle tube of the injector is stretched into the ampoule bottle to extract liquid. The mouth of the ampoule bottle is slender, and the syringe needle tube needs to be longer. The penicillin bottle is a small bottle sealed by a rubber plug and is generally used as a medicinal injection bottle, a powder injection, sterile packaged powder and the like, the bottle body is short, and the needle tube of a required injector is short.

At present, in conventional dispensing, a dispensing needle is often required to suck diluent from a glass ampoule bottle, and the diluent is injected into a penicillin bottle to dissolve freeze-dried powder. The existing dispensing needle comprises a metal needle and a plastic needle. The metal needle has the advantages that the rubber plug is easy to puncture, but the stabbing accident is easy to generate, and the safety is poor; the plastic needle has the advantages that the operation needle cannot produce a stabbing accident, but the plastic needle is too thick, so that the rubber plug of the medicine bottle is difficult to puncture.

In addition, no matter the medicine is a metal needle or a plastic needle, the liquid outlet of the traditional medicine dispensing needle is arranged at the top end, and the liquid is difficult to be pumped out in a closed medicine bottle such as a penicillin bottle, and the liquid medicine is difficult to be pumped out completely. Moreover, many medicine containers, such as ampoule bottles, penicillin bottles, injection bottles and the like, are often only suitable for single medicine bottles, but cannot be used for multiple medicine containers at the same time, for example, water for injection is extracted from the ampoule bottles and then is injected into the freeze-dried penicillin bottles to dissolve medicine powder.

The Chinese patent application CN 112618361A discloses a general dispensing needle and a general dispensing needle head, and adopts a mode of arranging a limiting part on a longer metal needle, so that the general dispensing needle can be used in ampoule bottles and penicillin bottles at the same time, but the structure has the defects of inconvenient processing, easy puncture accident generation, easy pollution, poor universality and the like, and is not effectively popularized.

The Chinese patent CN 213526418U discloses a needle for dispensing penicillin and an ampoule, which adopts an inner needle and an outer needle, but the inner needle and the outer needle are only used for exhausting, and the prior problems are not solved.

Disclosure of Invention

The invention aims to provide a nested reconstitution device, which adopts an inner needle and an outer needle, and adopts a structure that the inner needle and the outer needle are sleeved and detachable so as to meet the requirements of puncturing different medicine bottles; meanwhile, the liquid outlet of the inner needle is positioned at the lowest part of the liquid medicine when in use, and can completely extract the liquid medicine.

In order to achieve the above purpose, the invention provides a nested reconstitution device, comprising a tubular inner needle and an outer needle, wherein the inner needle is sequentially provided with an inner needle head, an inner needle body, a limiting part and an inner needle seat connected with a syringe, the inner cavity of the inner needle forms an inner liquid inlet channel penetrating the inner needle head, the inner needle body, the limiting part and the inner needle seat, and the diameter of the limiting part is larger than that of the inner needle body; the outer needle is sequentially provided with an outer needle head, an outer needle body and an outer needle seat, and an inner cavity of the outer needle forms an outer liquid inlet channel penetrating the outer needle head and the outer needle body; the outer needle seat is tightly sleeved on the outer side of the inner needle, and the outer liquid inlet channel is communicated with the inner liquid inlet channel. When the inner needle and the outer needle are sleeved together, the ampoule bottle can be used for drawing the liquid medicine. The outer needle is taken down, the inner needle can conveniently puncture the penicillin bottle, and the medicine liquid is injected and extracted to finish the medicine preparation. The invention can finish the dispensing process without changing the dispensing needle, has convenient use and good effect and is beneficial to popularization.

Preferably, the inner needle body is provided with a liquid inlet which is communicated with the inner liquid inlet channel. Thus, the injection and the extraction of the liquid medicine are more convenient.

Preferably, the shortest distance between the liquid inlet and the limiting part is not less than 0.5mm. The bottle stopper of the penicillin bottle is generally 0.5mm, so that when the penicillin bottle is inverted and the liquid medicine is extracted, the lowest position of the liquid inlet is lower than the lowest position of the liquid medicine, or the liquid medicine and the liquid medicine are flush, thereby ensuring that the liquid medicine in the penicillin bottle is completely extracted.

Preferably, the liquid inlet is a through groove which is opened on the side wall of the inner needle body and is communicated with the inner liquid inlet channel. The through groove structure is convenient to process, the area of the liquid inlet is enlarged, and after the outer needle is wrapped, the liquid medicine in the inner liquid inlet channel is not influenced to flow into the injector. Therefore, the structure has low cost, can meet the use requirement and has good use effect. Of course, the through groove may be replaced by a plurality of through holes.

Preferably, the inner cavity of the outer needle seat is matched with the outer contour shape of the front end of the inner needle, and the inner needle head is propped against the inner end of the outer liquid inlet channel, so that the outer liquid inlet channel is communicated with the inner liquid inlet channel. Thus, when the outer needle and the inner needle are sheathed together, the whole device can be used as a dispensing needle for drawing liquid medicine in an ampoule bottle.

Preferably, the limiting part is provided with a positioning column, and the end part of the outer needle seat is provided with a clamping groove matched with the positioning column. The structure can facilitate the assembly and the disassembly of the inner needle and the outer needle. Of course, the inner needle and the outer needle may be connected by other means such as threaded connection.

Preferably, the outer wall of the outer needle seat is provided with a reinforcing rib. The reinforcing ribs not only increase the strength of the outer needle seat, but also facilitate holding of the outer needle seat and convenient operation.

Preferably, the socket hole for connecting the inner needle seat and the syringe is 6% luer taper. The medical device connector is generally 6% luer taper, so that the universality of the product can be greatly improved.

Preferably, a protective sleeve is arranged outside the outer needle. Therefore, before use, the utility model is convenient for transportation and storage, and can prevent the occurrence of false puncturing.

As described above, the nested reconstitution device provided by the invention has the following beneficial effects:

1) The medicine dispensing needle does not need to be replaced, can meet the medicine dispensing requirements of different medicine bottles, has a simple structure and good use effect, and is beneficial to popularization;

2) The inner needle and the outer needle can be manufactured by injection molding, so that the cost is low, the manufacturing is convenient, the production efficiency is high, and the occurrence of false puncture can be prevented;

3) When the inner needle is needed to puncture, the outer needle is detached, so that the outer part of the inner needle can be kept clean, pollution is avoided, and the inner needle is convenient to use.

Drawings

FIG. 1 is a schematic view of an exploded construction of the present invention;

FIG. 2 is a schematic perspective view of the inner needle of the present invention;

FIG. 3 is a schematic cross-sectional view of the present invention;

fig. 4 is a schematic cross-sectional view of the present invention after mating with a syringe.

Reference numerals illustrate:

An inner needle 1; an inner needle 11; an inner needle 12; a limit part 13; an inner hub 14; a positioning column 15; an inner liquid inlet channel 16; a liquid inlet 17; an outer needle 2; an outer needle 21; an outer needle 22; an outer hub 23; a clamping groove 24; a reinforcing rib 25; an outer liquid inlet channel 26; a protective sleeve 3; a syringe 4.

Detailed Description

Further advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure of the present invention, which is described by the following specific examples.

It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the invention to the extent that it can be practiced, since modifications, changes in the proportions, or otherwise, used in the practice of the invention, are not intended to be critical to the essential characteristics of the invention, but are intended to fall within the spirit and scope of the invention. Also, the terms such as "upper", "lower", "left", "right", "middle", and the like are used herein for descriptive purposes only and are not intended to limit the scope of the invention for which the invention may be practiced or for which the relative relationships may be altered or modified without materially altering the technical context.

As shown in the figure, the nested reconstitution device comprises a tubular inner needle 1 and an outer needle 2, and a protective sleeve 3 is arranged on the outer side of the outer needle 2. The three parts of the inner needle 1, the outer needle 2 and the protective sleeve 3 are assembled in a coaxial series connection mode, packaged and sterilized. The hardness of the inner needle 1 and the outer needle 2 are different; the inner needle 1 is made of hard plastic, and the outer needle 2 is made of semi-hard plastic. The inner needle 1 is provided with an inner needle head 11, an inner needle body 12, a limiting part 13 and an inner needle seat 14 connected with the syringe 4 in sequence. The socket hole for connecting the inner needle seat 14 and the syringe 4 is 6% luer taper.

The inner cavity of the inner needle 1 forms an inner liquid inlet channel 16 penetrating the inner needle head 11, the inner needle body 12, the limiting part 13 and the inner needle seat 14. The diameter of the limiting part 13 is larger than the diameter of the inner needle body 12. In this way, the stopper 13 is ensured to be located outside the bottle stopper, and the inner needle 12 pierces into the bottle stopper.

The inner needle body 12 is provided with a liquid inlet 17, and the liquid inlet 17 is communicated with the inner liquid inlet channel 16. The liquid inlet 17 is a through groove which is formed on the side wall of the inner needle body 12 and is communicated with the inner liquid inlet channel 16. The shortest distance between the liquid inlet 17 and the limiting part 13 (as shown in fig. 2, the shortest distance refers to the distance between the lowest end of the through groove and the limiting part 13) is not less than 0.5mm. When the penicillin bottle is inverted, the lowest end of the through groove is lower than the lowest part of the liquid medicine, and the liquid medicine can be completely extracted. The through groove structure is adopted, so that the processing is convenient, and other forms such as through holes can be adopted for substitution.

The outer needle 2 is sequentially provided with an outer needle head 21, an outer needle body 22 and an outer needle seat 23, and an outer liquid inlet channel 26 penetrating the outer needle head 21 and the outer needle body 22 is formed in the inner cavity of the outer needle 2; the outer needle seat 23 is tightly sleeved outside the inner needle 1, and the outer liquid inlet channel 26 is communicated with the inner liquid inlet channel 16.

The outer wall of the outer needle seat 23 is provided with a reinforcing rib 25. The inner cavity of the outer needle seat 23 is matched with the outer contour shape of the front end of the inner needle 1, and the inner needle 11 is propped against the inner end of the outer liquid inlet channel 26, so that the outer liquid inlet channel 26 is communicated with the inner liquid inlet channel 16.

The inner needle 1 and the outer needle 2 are physically connected, and the air tightness is required to be ensured, but the outer needle 2 is also easy to pull out. The structure of the concrete connection comprises screw threads, a buckle type, taper fit and the like. The limiting part 13 is provided with a positioning column 15, and the end part of the outer needle seat 23 is provided with a clamping groove 24 matched with the positioning column 15. The inner needle and the outer needle are connected in a sealing way, minimum requirements: positive pressure: 50kpa 15sec; negative pressure: -40kpa x 15sec.

When the inner needle 1 and the outer needle 2 are sleeved together, the length and the shape of the inner needle are matched with those of the ampoule bottle, and the liquid medicine can be sucked from the ampoule bottle to the injector 4. When the outer needle 2 is taken down, the length shape of the outer needle is matched with that of a penicillin bottle, the liquid medicine of the syringe 4 can be injected into the penicillin bottle for mixing, and the mixed liquid medicine is pumped into the syringe 4.

The application process of the invention is as follows:

1) The inner needle 1, the outer needle 2 and the protective sleeve 3 are assembled firmly with the standard luer taper syringe 4;

2) Removing the protective sleeve 3;

3) The outer needle 2 is inserted into the ampoule bottle, and the liquid is extracted (diluted);

4) Removing the outer needle 2 after the liquid pumping is completed;

5) Puncturing the penicillin bottle rubber plug by using the inner needle 1, pushing the push rod of the injector 4, and injecting the diluent;

6) After dissolution is completed, inverting the penicillin bottle, and pumping all the liquid in the penicillin bottle into the syringe 4;

7) The syringe 4 is disconnected from the inner needle 1, and the preparation of the solution is completed.

As shown above, the nested redissolution device disclosed by the invention has the advantages of simple and reasonable structure, convenience in processing, low production cost and good use effect, and is beneficial to popularization.

The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.

Claims

1. The nested reconstitution device comprises a tubular inner needle (1) and an outer needle (2), and is characterized in that: the inner needle (1) is sequentially provided with an inner needle head (11), an inner needle body (12), a limiting part (13) and an inner needle seat (14) connected with the injector (4), an inner cavity of the inner needle (1) forms an inner liquid inlet channel (16) penetrating through the inner needle head (11), the inner needle body (12), the limiting part (13) and the inner needle seat (14), and the diameter of the limiting part (13) is larger than that of the inner needle body (12); the outer needle (2) is sequentially provided with an outer needle head (21), an outer needle body (22) and an outer needle seat (23), and an inner cavity of the outer needle (2) forms an outer liquid inlet channel (26) penetrating the outer needle head (21) and the outer needle body (22); the inner cavity of the outer needle seat (23) is matched with the outer contour shape of the front end of the inner needle (1), the outer needle seat (23) is tightly sleeved outside the front end of the inner needle (1), the inner needle head (11) abuts against the inner end of the outer liquid inlet channel (26), and the outer liquid inlet channel (26) is communicated with the inner liquid inlet channel (16); the inner needle body (12) is provided with a liquid inlet (17), and the liquid inlet (17) is communicated with the inner liquid inlet channel (16).

2. A nested reconstitution device according to claim 1, wherein: the shortest distance between the liquid inlet (17) and the limiting part (13) is not less than 0.5mm.

3. A nested reconstitution device according to claim 1 or 2, wherein: the liquid inlet (17) is a through groove which is formed on the side wall of the inner needle body (12) and is directly communicated with the inner liquid inlet channel (16).

4. A nested reconstitution device according to claim 1, wherein: the limiting part (13) is provided with a positioning column (15), and the end part of the outer needle seat (23) is provided with a clamping groove (24) matched with the positioning column (15).

5. A nested reconstitution device according to claim 1, wherein: the outer wall of the outer needle seat (23) is provided with a reinforcing rib (25).

6. A nested reconstitution device according to claim 1, wherein: the sleeve joint hole for connecting the inner needle seat (14) and the syringe (4) is 6% luer taper.

7. A nested reconstitution device according to claim 1, wherein: the outer side of the outer needle (2) is provided with a protective sleeve (3).