SU1743611A1 - Syringe-ampoule - Google Patents

Abstract

Use: in medicine for the storage of medicinal substances by injection. SUMMARY OF THE INVENTION: The device comprises a rigid capsule with a cannula, needle, piston, a piston displacement mechanism in the form of a tension spring and a stopper. On the cannula there are two grooves, and on the shank of the harp, a projection interacting with these grooves. The stiffness of the spring is selected from the condition of filling the naginal cavity with the medicinal substance, and the distance between the grooves is selected from the condition of filling the needle channel with fluid in this cavity of 1 ° C. f-ly, 5 ill.

Description

The invention relates to medicine, in particular to the construction of instruments for the storage of medicinal substances and injections.

A syringe ampoule is known to contain an elastic capsule for the drug substance and an injection needle.

A syringe ampoule is known, containing an elastic capsule for a medicinal substance, on the inner side of the wall of which, on one side, there are projections of a hybriform shape, and on the other side, notches of a similar shape.

Closest in construction is a syringe ampoule containing a rigid capsule, the cavity of which is filled with a medicinal substance. The capsule contains a piston located on the side opposite to the injection needle.

However, the design of this syringe ampoule does not exclude emboli due to the possibility of air getting into the tissue during the injection.

The purpose of the invention is to prevent air from entering the tissue during the injection,

The goal is achieved by inserting a coaxially rigid capsule into the syringe ampoule, which interacts with the injection needle shank, forming between the podigolny cavity, and the piston movement mechanism installed between the upper end and the piston. The piston movement mechanism is made in the form of a tension spring and a rod with a stopper passing through it. One end of the rod is connected to the piston, and a transverse channel is made at the other end extending through the opening in the upper end of the capsule. It contains a stopper connected by a flexible connection to the capsule body. On the outer surface of the cannula there are two annular grooves, and on the inner surface of the injection needle shank - locking protrusions with the possibility of their interaction with / breech grooves.

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The cannula is equipped with a protective cap. The stiffness of the spring is selected from the condition of filling the naginal cavity with the medicinal substance, and the distance between the grooves is selected from the condition of filling the needle channel with fluid in this area.

Figure 1 shows the syringe ampoula, a general view; in Figures 2, 3 and 4, respectively, the node (. section A-A and node II in Fig. 1; in Fig. 5, section B-B in Fig. 4.

The ampoule syringe contains a hard capsule 1 (Fig. 1) with a cannula 2 and an end 3, the cavity 4 of which is filled with a medicinal substance, the piston 5 and its mechanism of movement. The latter is made in the form of a tension spring 6 placed between the piston 5 and the end 3, and the rod 7 passing through it with the stopper 8. One end of the rod 7 is connected to the piston 5. At its other end passing through the hole 9 in the end 3, there is a transverse channel 10 (FIG. 2) in which the stopper 8 is located. The stopper 8 is connected by a flexible link 11. For example, a tape (FIGS. 1, 3) is connected to the cannula 1 of the syringe ampoule.

The cannula 2 is coaxial to the capsule 1 and interacts with the shank 12 (FIG. 4) of the injection needle 13, forming the nagulina cavity 17 on the outer surface of the cannula 2 there are annular grooves 14 and 15 (FIGS. 4, 5), and on the inner surface of the shank 12 needles 13 the locking protrusions 16 are made. In the initial position of the syringe-ampoule, the locking protrusions 16 are inserted into the groove 14, fixing the initial position of the needle 13. The hypoxia 17 of the shank 12 and the internal cavity 18 of the injection needle are filled with the drug. The syringe ampoule is equipped with a protective cap 19. The stiffness of the spring 6 is selected from the condition of filling the hypodermic cavity 17 with the medicinal substance, and the distance between the grooves 14 and 15 is selected from the condition of filling the needle channel 18 with the fluid in this cavity.

A vial syringe is used as follows.

Before the injection by pressing on the cap 19, the needle 13 is moved to the lower position and is fixed when the projections 16 enter the annular groove 15. Moreover, if a certain amount of the drug substance has poured out from the cavity 18 of the needle 12 (at work, falling and P. syringe ampoules), then the cavity 18 is again filled with this substance, displaced from the articulating cavity 17 of the shank 12.

In this way, there is no air in the needle 13 prior to the injection.

After removing the protective cap 19 and

inserting the needle 13 into the injected tissue, the stopper 8 is pulled out of the channel 10 for the flexible connection 11, unlocks the rod 7 and the piston 5. The spring 6, when activated, moves the piston 5 and displaces the drug substance from the capsule 1. The release of the rod 8 and the piston 5 can also be performed immediately before the start of the injection. The possibility of air getting into the needle 13

This case is also absent, since the piston 5 can move only in one direction - the direction of action of the spring 6.

Random exit of the stopper 8 from the channel

10 prevents it from being pressed to the rod 7 by a compressed spring 6. The threaded hole 20 (FIG. 2) is used to force the piston 5 to fill the syringe ampoule with a medicinal substance.

Claims (2)

1. Ampoule syringe, made in the form of a rigid capsule, the cavity of which is filled with a medicinal substance, containing a piston and placed in the lower end An injection needle, characterized in that, in order to prevent air from entering the tissues during the injection, cannulas inserted on the injection shank are inserted coaxially with the capsule. needles, forming a nadgol cavity between them, and a piston moving mechanism, installed between the upper end and the piston, made in the form of a tension spring and a rod with a stopper passing through it, with one end of the rod connected to the piston, and at the other end, the output Through a hole in the upper end of the capsule, there is a transverse channel in which a stopper is placed, connected by a flexible connection with the capsule body, while on the outer surface of the cannula there are two annular grooves, and the shank of the injection needle on the inner side formed with a locking projection with the possibility of reacting with these grooves, wherein the spring stiffness is selected from the condition of filling the naginal cavity with the medicinal substance, and the distance between the grooves is selected from the condition of filling the channel with the corners of the fluid in this cavity. 2. Ampoule syringe4 according to claim 1, in accordance with the fact that, in order to improve ease of use, the cannula is equipped with a protective cap. Cb . en OL I-I CX I SHUM 5