JPS58133260A - Multistage syringe - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a syringe for medical use, and more particularly to a multistage syringe in which a cylinder and a piston are combined in two or more stages.

Generally speaking, medical syringes have only one piston combined with one cylinder, and for this reason, it is difficult to expect diversification of usage conditions, such as when injecting medicinal solutions or drawing blood. In other words, when injecting multiple types of drug solutions, a separate syringe is used for each drug solution, and the patient is injected twice. In addition, when collecting blood, for example, in the case of special blood collection such as administering a reagent to observe a certain blood reaction and then collecting blood from the surrounding area, separate syringes are used for injecting the reagent and collecting blood. It was.

The present invention proposes a syringe that can inject a plurality of drugs with a single syringe, and can also perform the above-mentioned special blood collection all at once. That is, the specific structure is that an intermediate piston is slidably provided on an outer cylinder with a first cylinder on the inside,
A cylinder constructed inside the intermediate piston is combined with one or more subsequent pistons.

The present invention will be specifically described below based on illustrated embodiments. FIG. 1 shows an exploded perspective view of a multi-stage syringe according to the present invention, in which reference numeral 1 indicates an outer cylinder, reference numeral 2 indicates a first piston, which is an intermediate piston, and reference numeral 3 indicates a second piston, which is the final piston.

First, the outer cylinder l has its inside connected to the first cylinder 11. At the same time, an opening 12 is formed on the tip side thereof. Here is the syringe needle a
It is used by attaching it directly or indirectly. A flange 13 is formed on the outside of the opening side of the first cylinder (2). On the other hand, the first piston, which is an intermediate piston, has a second cylinder 21 on its inside and an opening 22 at the tip of the piston. A flange portion is formed on the opening side of the second cylinder. Furthermore, since the second piston 3 is the final piston in this embodiment, there is no opening in the piston head, and the inside does not constitute a cylinder.

A flange product is then formed at the rear end.

The present invention has such a configuration and is used in the following manner. First, when injecting a medicinal liquid into the syringe, at the beginning of use, each piston is compressed to minimize the volumes of the first cylinder 2 and the second cylinder 21 (see FIG. 3(a)). Next, pull out the second piston 3, which is the final piston, and open the second cylinder (
3) Let the chemical solution 1.1 be sucked into 21 (Figure 3 (
(See b)). After a predetermined amount of this is inhaled, another medicinal liquid 12 is further inhaled into the first cylinder η. That is, the first
The piston 2 is pulled out and the chemical liquid is sucked into the first cylinder 11 (see Fig. 3 (c)). Of course, in this case, it is desirable to hold the second piston 3 so that it does not move in order to prevent backflow from the second cylinder 21. Then, the first piston 2 is pulled out to a predetermined distance and a certain amount of the chemical liquid is sucked into the first cylinder n, thereby completing the preparation work for the chemical liquid. Next, when injecting this into a patient, first push out the first piston 2, which is the intermediate piston, and inject the drug solution j in the first cylinder 11 into the body (
(See Figure 3).

In this case, naturally, pressure is applied to the second cylinder a side, so the second piston 3 is held in order to suppress this pressure. In this way, the first piston 2 is pushed in, and after all of the medicinal liquid in the first cylinder U is injected, the second piston 3 is pushed in, and the entire force of the medicinal liquid in the second cylinder is injected. ) See Figure 3 (E)).

This example of injection work shows the most basic usage, but various other usages are also possible. Blood from the inserted vein can be collected and sent for testing.

As described above, according to the present invention, the cylinders of the syringe are configured in a multistage manner, thereby making it possible, for example, to inject two or more kinds of medicines one after the other, and to collect blood while administering various reagents. These tasks have become possible all at once.

This reduces the burden on both doctors and patients, allowing them to perform their work more reliably.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of a multi-stage syringe according to the present invention, FIG. 2 is a central longitudinal view of the same, and FIG. 3 is a longitudinal sectional side view of an example of the state of use. 1; Outer cylinder 2; First piston 3; Second
Piston U; 1st cylinder I, 22; Open
Port 21; second cylinder

Claims (1)

[Claims] A multi-stage syringe characterized in that an intermediate piston is slidably provided on an outer cylinder with a first cylinder on the inside, and one or more subsequent pistons are combined with the cylinder configured inside the intermediate piston.