RU1801013C - Glass syringe-ampulla - Google Patents

Abstract

Usage: in the field of medicine, in particular in instruments for introducing medicinal fluids into the human body. SUMMARY OF THE INVENTION: a glass syringe-ampoule consists of a thin-walled glass (0.2-0.5 mm) cylinder coated with a thin polymer film and has a tip, the outlet of which is sealed with a seam — a monolithic stopper. The cavity of the syringe is filled with a drug solution, and the entrance is closed by a piston-stopper, to the bottom of which a glass plate is attached, for the purpose of sealing around the circumference of the piston there is a groove in which a silicone ring is inserted. The piston is made of plastic. In the form of a glass, the inner surface of the bottom is made in the form of a concave sphere or funnel. The upper edge of the piston passes into the funnel-shaped cover facing inward with an aperture in the center and radial slots extending from it to introduce a rod head, along the edge of which there is a cone which, when inserted into the piston cavity, does not allow the rod to disengage from the piston. A membrane is sealed around the edge of the entrance to the syringe cavity. A storage needle is inserted into the stem cavity. 3 ill.

Description

. The invention relates to the field of medicine, in particular to instruments for administering medicinal fluids to the human body.

The purpose of the invention is to prevent contact (isolation) of the drug solution with the polymer material, to increase safety when working with the syringe and to reduce its weight.

The goal is achieved by the construction of the syringe, consisting of a thin-walled glass cup covered with a polymer film, in the bottom of the cup there is an exit in the form of a conical tip under the needle of a sealed monolithic glass stopper, the entrance is closed by a piston-robot. the surface of which faces the syringe cavity is covered with a glass plate, the stem is separate with the head mating with the outer surface of the piston, which is made in the form of a concave sphere or funnel, its edge passes into the funnel-shaped cover facing inward, with a central hole and radial cuts into which the stem head enters at the equator of which an elastic skirt is attached.

The invention is illustrated in FIG. 1-3.

The glass lined syringe ampoule consists of a thin-walled (0.2-0.5 mm thick) glass cylinder 1, coated with a thin polymer film 2, at the bottom of which there is an outlet made in the form of a conical tip 3, sealed with a monolithic stopper seam 4 5 (FIG. 1). The syringe cavity is filled with a drug solution, and the inlet is closed by a piston plug 6, to the bottom of which a glass

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plate 7, for the purpose of sealing around the circumference of the piston there is a groove in which a silicone ring 8 is inserted.

The piston plug b (FIG. 2) is made of plastic in the form of a cup, the inner surface of the bottom is made in the form of a concave sphere or funnel 9, the upper edge of the piston passes into the funnel-shaped cover 10 facing inward with a hole in the center and slots for introduction into it are the heads 11 of the rod 12, at the equator of which there is a cone 13, which, when introduced into the cavity, the piston does not allow the rod to separate (Fig. 3). The entrance to the syringe cavity is sealed with a membrane 14 (Fig. 1). A needle is inserted into the stem cavity for storage. The wall thickness of the syringe ampoule will depend on the capacity of the syringe.

The glass syringe ampoule after sterilization is filled with the drug solution in the factory. The inlet is closed by a piston plug and seals with a membrane, the outlet of the tip is sealed with a molten drop of glass plug. The tip is coated with a polymer film to the point of connection with the stopper, a sterile plastic cap is put on the tip to protect the tip from contamination. A sterile injection needle is inserted into the cavity 15 of the stem. Before use, the membrane 14 is opened, the stem is connected to the piston plug. The plastic cap is removed from the tip and, at the same time, the cap 5 breaks off.

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needle and put on the tip. The syringe is ready to go.

This design complicates the manufacturing technology of the syringe by additionally coating the wall with a polymer film, however, by reducing the wall thickness and combining the function of the vessel for storing the liquid drug and the instrument for introducing it into the body, this saves material and lightens its weight.

Claims (1)

SUMMARY OF THE INVENTION A glass syringe-ampoule containing a cylindrical body with a tip and a piston-plug made of polymer material with external sealing elements and a central stepped hole placed in the body, a rod with a stop made to interact with the piston plug with its working end in the form of a hemisphere, transition cone, characterized in that, in order to exclude the contact of the drug solution with the polymeric material, to increase the safety during operation with a syringe and to reduce its weight, the cylinder is made thin-walled and additionally equipped with a polymer film, while the bottom of the piston plug is made of glass, the piston step on the rod side has the shape of a concave sphere, the upper edge of which passes into the funnel-shaped cover facing inward with an opening in the center, with the outlet the tip is sealed with a monolithic glass stopper with its subsequent removal. Phi & 1 Figz