Liquid medicine transfer needle and liquid medicine transfer device thereof

Abstract

The utility model relates to a liquid medicine transfer needle and a liquid medicine transfer device, and the main body of the liquid medicine transfer needle is a long and straight cylindrical needle body; two ends of the needle body are sharpened to form needle tips; the needle body is internally provided with two channels which are isolated from each other, namely a liquid medicine channel and a gas channel; the two channels penetrate through the needle body and are connected with the needle tips at the two ends; the liquid medicine channel is an arc-shaped hole, and the gas channel is a round hole; the cross section area of the liquid medicine channel is larger than that of the gas channel. The liquid medicine transfer device comprises the liquid medicine transfer needle and a buckle, a partition flat plate is arranged at the position of a partition plane in the middle of the liquid medicine transfer needle; and the buckle is formed on one side of the partition flat plate. The utility model has a simple structure, and is easy to manufacture by one-step molding through injection molding; through the special structural design, the liquid medicine transfer process is fast and smooth; meanwhile, when the needle point pierces the rubber plug of the medicine bottle, rubber particles cannot be separated, and safety and reliability in the using process are improved.

Description

Technical Field

[0001] The utility model relates to a special needle structure for transferring liquid medicine and a liquid medicine transfer device formed by adopting the liquid medicine transfer needle, belonging to the field of medical injection equipment. Background Art

[0002] A vial, also known as a borosilicate glass or soda-lime glass tube (molded) injection bottle, is a small bottle sealed with a rubber stopper and an aluminum-plastic combination cover. It has good sealing properties and is usually used for the packaging of vaccines, biological preparations, powder injections, freeze-dried medicines and other medicines.

[0003] When medical staff use medicines in vials, they often need to use a syringe to draw the injection liquid from an infusion bottle or other container into the syringe, then insert the needle of the syringe into the vial and inject the injection liquid into the vial until there is enough liquid medicine in the vial; then shake the vial to mix the injection liquid and the medicine thoroughly; then use the syringe to draw the mixed liquid medicine from the vial, inject it into the infusion bottle, mix it with the injection liquid, and inject it. The whole process is cumbersome, and if there is any medicine residue, the operation needs to be repeated, which is even more troublesome. Otherwise, it is easy to cause problems such as insufficient dosage and waste of medicine; and a syringe is required in the process.

[0004] In view of the above situation, a special liquid medicine transferor was invented, and reference may be made to a liquid medicine transferor with Chinese Patent Publication No. CN212593059U, a liquid medicine transferor with an eccentric needle with Chinese Patent Publication No. CN212067203U, a liquid medicine transfer filter with an eccentric needle and a filtering structure with Chinese Patent Publication No. CN212067202U, a mixing cup with a clamping structure with Chinese Patent Publication No. CN209392392U, and a disposable safe medicine dissolving device with Chinese Patent Publication No. CN204840288U.

[0005] The structure of the drug liquid transferor is simple, and it is mainly composed of a double-ended needle and a buckle or a sheath. The double-ended needle pierces the rubber stoppers of the syringe bottle and the infusion bottle at the same time to connect the two together, so that the injection liquid in the infusion bottle can enter the syringe bottle, mix the medicine in the syringe bottle, and then flow back to the infusion bottle; even if the mixing and transfer is not thorough once, the second and third mixing and transfer can be conveniently carried out; and the special drug liquid transferor has a simple structure, lower cost than the syringe, and the whole operation process is more convenient.

[0006] However, in actual use, infusion bottles are generally soft bottles, and the injection liquid can be conveniently injected into the vial through a double-ended needle by squeezing; but the vial is a hard glass bottle, and the liquid medicine inside it needs to rely on its own gravity to flow back into the infusion bottle; after mixing the medicines, the liquid medicine has a certain viscosity, and during the process of flowing back to the infusion bottle through the fine hole of the double-ended needle, negative pressure is gradually formed inside the vial, making it difficult for the liquid medicine to flow back.

[0007] In view of the above problems, it is necessary to improve the double-ended needle structure of the drug solution transfer device. Utility Model Content

[0008] The utility model aims to provide a drug liquid transfer needle and a drug liquid transfer device formed by using the drug liquid transfer needle, which can conveniently transfer drug liquid from one medicine bottle to another medicine bottle, and is particularly suitable for transferring drug liquid in a syringe bottle.

[0009] In order to achieve the above utility model object, the first aspect of the utility model provides a drug liquid transfer needle, the main body of which is a long straight cylindrical needle body;

[0010] Both ends of the needle body are sharpened to form a needle tip;

[0011] There are two channels isolated from each other in the needle body, namely the liquid medicine channel and the gas channel;

[0012] Two channels run through the needle body and are connected to the needle tips at both ends.

[0013] As a further improvement of the utility model, the liquid medicine channel is an arc-shaped hole, and the gas channel is a round hole;

[0014] The cross-sectional area of ​​the liquid medicine channel is greater than the cross-sectional area of ​​the gas channel.

[0015] As a further improvement of the utility model, the middle of the liquid medicine transfer needle is a partition plane for separating the medicine bottles on both sides;

[0016] The opening formed by the needle tip on the liquid medicine channel is the liquid medicine inlet;

[0017] The shortest distance between the liquid medicine inlet and the separation plane is h13;

[0018] The opening formed by the needle tip on the gas channel is the gas inlet;

[0019] The closest distance between the gas inlet and the separation plane is h14.

[0020] Furthermore, h14>h13.

[0021] As a further improvement of the utility model, the top of the needle tip of the liquid medicine transfer needle is cut off on the side close to the liquid medicine channel to form a plane, and on the side close to the gas channel to form a semi-cone;

[0022] Both sides of the top of the needle tip form cutting edges.

[0023] Furthermore, a bevel transition is provided between the drug liquid inlet of the drug liquid channel and the upper part of the needle tip.

[0024] A second aspect of the utility model provides a liquid medicine transfer device, comprising the liquid medicine transfer needle as described above, and a buckle;

[0025] A dividing plate is provided at the dividing plane position in the middle of the drug liquid transfer needle; the dividing plate forms the buckle toward one side.

[0026] As a further improvement of the present utility model, the buckle is composed of a plurality of vertically arranged arc-shaped spring pieces;

[0027] A hook is provided at the bottom of the shrapnel;

[0028] There are slots between adjacent spring pieces, and the slots penetrate the spring pieces;

[0029] All the spring pieces are folded together to form a cylindrical accommodating chamber.

[0030] Furthermore, the inner diameter of the accommodating chamber formed by closing the spring pieces is D, and D is larger than the outer diameter of the cap or the rubber plug of the medicine bottle to be docked by the buckle;

[0031] The hook is located on the inner side of the buckle to form a limiting platform;

[0032] The inner diameter of the limiting circular ring platform formed by closing the limiting platforms on all the hooks is d, and d is smaller than the outer diameter of the cap or the plug of the medicine bottle that the buckle needs to dock with.

[0033] Furthermore, d is greater than the outer diameter of the bottleneck of the medicine bottle to which the buckle needs to be connected.

[0034] Furthermore, the hook is located at the lower part of the buckle to form a guiding cone surface;

[0035] The guide cone is tilted downward and inward;

[0036] The bottom diameter of the guiding cone is larger than the outer diameter of the cap or the rubber stopper of the medicine bottle to be docked with the buckle.

[0037] When the medicine liquid transferor of the present invention is used, it is first fixed to the vial. During operation, the vial can be placed vertically on the table, the needle tip of the medicine liquid transfer needle facing the buckle is aligned with the middle positioning point of the rubber plug of the vial, and then the open side of the partition plate is pressed by hand to push the medicine liquid transferor toward the vial; the needle tip and part of the needle body first pierce the rubber plug and enter the vial; then the buckle contacts the cap of the vial, and guided by the conical surface and the arc chamfer of the cap itself, the hook is forced to drive the spring piece to open outward until the hook is fully opened and the hook is clamped on the column of the cap; continue to apply force so that the hook passes over the cap and is clamped on the bottleneck of the vial, and at this time the top of the cap or the rubber plug also presses against the closed side of the partition plate; at this point, the combination of the medicine liquid transferor of the present invention and the vial is completed. Then, take the infusion bottle, align the needle tip on the other side of the medicine transfer needle with the rubber stopper of the infusion bottle, and apply force together with the syringe bottle to make the needle tip quickly pierce the rubber stopper of the infusion bottle. Since there is no obstruction of the buckle, the piercing process will be smoother, until the rubber stopper of the infusion bottle abuts against the open side of the partition plate, the installation of the medicine transferor of the utility model is completed, and two channels, namely the medicine channel and the gas channel, are constructed between the syringe bottle and the infusion bottle through the medicine transfer needle.

[0038] Put the syringe bottle at the bottom and the infusion bottle at the top, so that the injection liquid flows into the syringe bottle; when the injection liquid in the syringe bottle is enough, hold the syringe bottle and the infusion bottle with both hands, shake and mix them; then, put the syringe bottle at the top and the infusion bottle at the bottom, so that the mixed liquid medicine in the syringe bottle can be transferred to the infusion bottle; after the liquid medicine in the syringe bottle is transferred, the inner wall of the syringe bottle can be observed. If there is a lot of medicine residue, it can be turned upside down again, with the syringe bottle at the bottom and the infusion bottle at the top, and the injection liquid is injected into the syringe bottle, and then the medicine is mixed by shaking, and then it is turned over again, with the syringe bottle at the top and the infusion bottle at the bottom, so that the mixed liquid medicine in the syringe bottle is transferred to the infusion bottle; during the process, there is no need to remove the liquid medicine transferor of the utility model.

[0039] After confirming that the medicine and liquid medicine in the vial have been transferred, the vial and the liquid medicine transfer device of the utility model are directly removed from the infusion bottle and discarded.

[0040] The medicine liquid transfer needle and the medicine liquid transfer device of the utility model have a simple structure and are easy to manufacture by one-time injection molding, so the cost is low; and through the special structural design of the medicine liquid transfer needle, the medicine liquid transfer process is faster and smoother; at the same time, when the needle tip pierces the rubber stopper of the medicine bottle, no rubber particles will be separated, thereby improving the safety and reliability of the use process; after removing the medicine liquid transfer device of the utility model, the rubber stopper can also be smoothly closed to achieve closure. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 The overall structure of the liquid medicine transfer device of the utility model is shown in FIG. Figure 1 ;

[0042] Figure 2 The overall structure of the liquid medicine transfer device of the utility model is shown in FIG. Figure 2 ;

[0043] Figure 3 The overall structure of the liquid medicine transfer device of the utility model is shown in FIG. Figure 3 ;

[0044] Figure 4 It is an overall cross-sectional schematic diagram of the liquid medicine transfer device of the utility model;

[0045] Figure 5 It is a schematic diagram of the internal section of the liquid medicine transfer device of the utility model;

[0046] Figure 6 It is a cross-sectional schematic diagram of the drug transfer needle of the utility model;

[0047] Figure 7 It is a cross-sectional schematic diagram of the buckle of the vial;

[0048] Figure 8 This is a schematic diagram of the use status of the liquid medicine transfer device of the utility model. DETAILED DESCRIPTION

[0049] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.

[0050] The utility model relates to a liquid medicine transfer device, the overall structure of which is as follows Figure 1-Figure 3 As shown, the internal structure can be referred to Figure 4 , Figure 5 ; Among them, the main structural improvement is made to the drug transfer needle, and its cross section can be found in Figure 6 .

[0051] The drug liquid transfer device mainly comprises a drug liquid transfer needle 1 and a buckle 2 for clamping a syringe bottle.

[0052] The drug transfer needle 1 as a whole comprises a long straight cylindrical needle body 11, with both ends of the needle body 11 sharpened to form a needle tip 12 for piercing the rubber stopper of a syringe bottle and an infusion bottle; the needle body 11 is provided with two isolated channels, namely a drug channel 13 and a gas channel 14, which pass through the needle body and are connected with the needle tip 12 at both ends.

[0053] like Figure 6 As shown, the liquid medicine channel 13 is an arc-shaped hole, and the gas channel 14 is a circular hole; the cross-sectional area of ​​the liquid medicine channel 13 is larger than the cross-sectional area of ​​the gas channel 14, so that the liquid medicine can be transferred using a larger channel, and the transfer speed is faster.

[0054] The middle of the drug transfer needle 1 is a partition plate 21 of the buckle 2, which is used to separate the syringe bottle and the infusion bottle to prevent the drug transfer needle 1 from being inserted into the syringe bottle or the infusion bottle at different depths.

[0055] Further, such as Figure 4 , Figure 5 As shown, the opening formed by the needle tip 12 on the drug liquid channel 13 is the drug liquid inlet 131; the shortest distances between the drug liquid inlet 131 and the partition plate 21 are h131 (on the infusion bottle side) and h132 (on the syringe bottle side), and h131≈h132; this distance is slightly larger than the thickness of a commonly used rubber stopper, so that after the needle body 11 is inserted into the syringe bottle or infusion bottle, it can completely pierce the rubber stopper, and the drug liquid inlet 131 is completely located in the bottle to avoid the risk of drug liquid leakage. At the same time, the drug liquid inlet 131 can be as close to the rubber stopper as possible, so that the drug liquid can fully flow out through the drug liquid inlet 131 to reduce drug liquid residue.

[0056] The opening formed by the needle tip 12 on the gas channel 14 is a gas inlet 141; the shortest distances between the gas inlet 141 and the partition plate 21 are h141 (on the infusion bottle side) and h142 (on the syringe bottle side), and h141≈h142.

[0057] h141>h131, h142>h132; Figure 8 As shown, when the liquid medicine transfer device of the utility model is used to transfer the mixed liquid medicine in the syringe bottle A into the infusion bottle B, the syringe bottle A is on top and the infusion bottle B is on the bottom, and they are placed vertically; the liquid medicine in the syringe bottle A is affected by gravity and flows downward into the infusion bottle B through the liquid medicine channel 13 and / or the gas channel 14; as the liquid medicine in the syringe bottle A decreases, the pressure in the upper cavity in the bottle decreases, and at this time, the pressure in the upper cavity in the infusion bottle B increases slightly; when the pressure in the upper cavity in the infusion bottle B is greater than the pressure in the upper cavity in the syringe bottle A, since the gas inlet 141 of the gas channel 14 located in the syringe bottle A is higher than the liquid medicine inlet 131 of the liquid medicine channel 13 located in the syringe bottle A, the air in the upper cavity in the infusion bottle B will enter the gas channel 14, and then rise into the syringe bottle A, so that the pressure in the upper cavity in the syringe bottle A rises, so that the liquid medicine in the syringe bottle A can flow into the infusion bottle B more smoothly, completing the transfer of the liquid medicine.

[0058] At the same time, the liquid medicine inlet 131 of the liquid medicine channel 13 is closer to the partition plate 21, so the needle tip 12 is completely cut off, that is, one side of the top of the needle tip 12 is a plane, and the other side is a semi-cone formed by cutting the gas channel 14. The cross-section of the top of the needle tip 12 is approximately a triangular pyramid structure, and cutting edges are formed on both sides, so that the tip of the needle tip 12 is sharper and easier to pierce the rubber plug. The cutting opening is in the shape of an "I", so that the colloid is not easily cut off, causing the colloid particles to detach and block the channel; when approaching the liquid medicine inlet 131, the "I"-shaped opening on the rubber plug has been fully expanded by the cutting edge, so that it is easier to achieve elastic deformation expansion along the inclined surface of the liquid medicine inlet 131, wrap the needle body 11, form a reliable seal, and avoid leakage; when the liquid medicine transfer device of the utility model is pulled out, the "I"-shaped opening is also easy to elastically recover and close to avoid leakage.

[0059] The drug liquid transfer device of the utility model has a partition plate 21 in the middle of the drug liquid transfer needle 1 for separating the syringe bottle and the infusion bottle; the partition plate 21 forms a buckle 2 on one side for clamping and fixing the bottle mouth of the syringe bottle.

[0060] The buckle 2 is composed of a plurality of vertically arranged arc-shaped spring pieces 22, and a hook 23 is provided at the bottom of the spring piece 22; a slot 24 is provided between adjacent spring pieces 22, and the slot 24 runs through the spring piece 22 from the position of the partition plate 21, so that each spring piece 22 is an independent elastic body; the liquid medicine transfer device of the utility model is integrally formed by injection molding, so the spring piece 22 can be forced to open outward, and then can automatically reset. All the spring pieces 22 are closed to form a cylindrical accommodation chamber for accommodating the bottle mouth and cap of the vial.

[0061] Further references Figure 7 .

[0062] One side of the partition plate 21 is a closed side 211, which is located inside the buckle 2 and is used to limit the cap and plug of the syringe bottle; the other side of the partition plate 21 is an open side 212, which is located outside the buckle 2 and is used to limit the cap and plug of the infusion bottle.

[0063] The inner diameter of the accommodating chamber formed by closing the spring pieces 22 is D, which is slightly larger than the outer diameter of the cap or the plug of the vial.

[0064] The hook 23 is located on the inner side of the buckle 2 to form a limiting platform 231, which is used to clamp the bottle mouth of the syringe bottle and the lower edge of the cap. The inner diameter of the limiting circular ring formed by the limiting platforms 231 on all the hooks 23 is d, which is smaller than the outer diameter of the cap or plug of the syringe bottle, but preferably larger than the outer diameter of the bottleneck of the syringe bottle.

[0065] The hook 23 is located at the lower part of the buckle 2, forming a guide cone 232, which is inclined downward and inward, and the bottom diameter is preferably slightly larger than the outer diameter of the cap or plug of the vial; generally speaking, the top outer ring of the cap or plug of the vial will also be provided with an arc chamfer.

[0066] When the liquid medicine transfer device of the utility model is used, it can be first fixed to a vial. When operating, the vial can be placed vertically on a table, the needle tip 12 of the liquid medicine transfer needle 1 facing the side of the buckle 2 is aligned with the middle positioning point of the rubber stopper of the vial, and then the open side 212 of the partition plate 21 is pressed by hand to push the liquid medicine transfer device toward the vial; the needle tip 12 and part of the needle body 11 first pierce the rubber stopper and enter the vial; then the buckle 2 and the cap of the vial are closed. Contact, guided by the conical surface 232 and the arc chamfer of the cap itself, the hook 23 is forced to drive the spring piece 22 to open outward until the hook 23 is fully opened and the hook 23 is stuck on the column of the cap; continue to apply force to make the hook 23 pass over the cap and get stuck on the bottleneck of the vial, at this time, the top of the cap or the plug also reaches the closed side 211 of the partition plate 21; at this point, the combination of the liquid medicine transferor of the utility model and the vial is completed. Then, take the infusion bottle, align the needle tip 12 on the other side of the medicine transfer needle 1 with the rubber stopper of the infusion bottle (the middle positioning point can be avoided), and apply force together with the syringe bottle to make the needle tip 12 quickly pierce the rubber stopper of the infusion bottle. Since there is no obstruction of the buckle 2, the piercing process will be smoother, until the rubber stopper of the infusion bottle abuts against the open side 212 of the partition plate 21, the installation of the medicine transferor of the utility model is completed, and two channels, namely the medicine channel 13 and the gas channel 14, are constructed between the syringe bottle and the infusion bottle through the medicine transfer needle 1.

[0067] Put the syringe bottle at the bottom and the infusion bottle at the top, so that the injection liquid flows into the syringe bottle; when the injection liquid in the syringe bottle is enough, hold the syringe bottle and the infusion bottle with both hands, shake and mix them; then, put the syringe bottle at the top and the infusion bottle at the bottom, so that the mixed liquid medicine in the syringe bottle can be transferred to the infusion bottle; after the liquid medicine in the syringe bottle is transferred, the inner wall of the syringe bottle can be observed. If there is a lot of medicine residue, it can be turned upside down again, with the syringe bottle at the bottom and the infusion bottle at the top, and the injection liquid is injected into the syringe bottle, and then the medicine is mixed by shaking, and then it is turned over again, with the syringe bottle at the top and the infusion bottle at the bottom, so that the mixed liquid medicine in the syringe bottle is transferred to the infusion bottle; during the process, there is no need to remove the liquid medicine transferor of the utility model.

[0068] After confirming that the medicine and liquid medicine in the vial have been transferred, the vial and the liquid medicine transfer device of the utility model are directly removed from the infusion bottle and discarded.

[0069] The preferred embodiments of the present invention have been specifically described above, but the present invention is not limited to the described embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention, and these equivalent modifications or substitutions are all within the scope defined by the claims of this application.

Claims

1. A drug solution transfer needle, characterized in that: The main body is a long straight cylindrical needle; Both ends of the needle body are sharpened to form a needle tip; There are two channels isolated from each other in the needle body, namely the liquid medicine channel and the gas channel; Two channels run through the needle body and are connected to the needle tips at both ends.

2. The drug transfer needle according to claim 1, characterized in that: The liquid medicine channel is an arc hole, and the gas channel is a round hole; The cross-sectional area of ​​the liquid medicine channel is greater than the cross-sectional area of ​​the gas channel.

3. The drug solution transfer needle according to claim 1, characterized in that: The middle of the drug transfer needle is a dividing plane for separating the medicine bottles on both sides; The opening formed by the needle tip on the liquid medicine channel is the liquid medicine inlet; The shortest distance between the liquid medicine inlet and the separation plane is h13; The opening formed by the needle tip on the gas channel is the gas inlet; The closest distance between the gas inlet and the separation plane is h14.

4. The drug solution transfer needle according to claim 3, characterized in that: h14>h13.

5. The drug solution transfer needle according to claim 1, characterized in that: The top of the needle tip of the drug transfer needle is cut off to form a plane on the side close to the drug channel, and is formed into a semi-cone on the side close to the gas channel; Both sides of the top of the needle tip form cutting edges.

6. The drug solution transfer needle according to claim 5, characterized in that: A bevel transition is arranged between the medicine liquid inlet of the medicine liquid channel and the upper part of the needle tip.

7. A liquid medicine transfer device, characterized in that: It comprises a drug transfer needle as described in any one of claims 1 to 6, and a buckle; A dividing plate is provided at the dividing plane position in the middle of the drug liquid transfer needle; and the buckle is formed on one side of the dividing plate.

8. The liquid medicine transfer device according to claim 7, characterized in that: The buckle is composed of a plurality of vertically arranged arc-shaped spring pieces; A hook is provided at the bottom of the shrapnel; There are slots between adjacent spring pieces, and the slots penetrate the spring pieces; All the spring pieces are folded together to form a cylindrical accommodating chamber.

9. The liquid medicine transfer device according to claim 8, characterized in that: The inner diameter of the accommodating chamber formed by closing the spring pieces is D; D is larger than the outer diameter of the cap or stopper of the medicine bottle to which the buckle needs to be connected; The hook is located on the inner side of the buckle to form a limiting platform; The inner diameter of the limiting circular ring formed by closing the limiting platforms on all the hooks is d; d is smaller than the outer diameter of the cap or the rubber stopper of the medicine bottle to which the buckle needs to be connected; d is larger than the outer diameter of the bottleneck of the medicine bottle with which the buckle needs to dock.

10. The liquid medicine transfer device according to claim 8, characterized in that: The hook is located at the lower part of the buckle to form a guiding cone surface; The guide cone is tilted downward and inward; The bottom diameter of the guiding cone is larger than the outer diameter of the cap or the rubber stopper of the medicine bottle to be docked with the buckle.

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