Soup syringe

Abstract

Provided is a drug solution injection tool that is applicable for many hours without using any large-sized battery to continue the stable injection of the drug solution at a predetermined fixed injection speed, irrespective of the kinds and temperatures of the drug solution to be injected. The drug solution injection tool comprises a pressured drug solution dispensing means, a secondary pressure means in which the drug solution communicates with the pressured drug solution dispensing means via an upstream side channel, an upstream side open / close means located at the upstream side channel and opening or closing drug solution communication between the pressured drug solution dispensing means and the secondary pressure means, a downstream side open / close means located at a downstream side channel provided at the downstream side of the secondary pressure means, and a control means for controlling the open / close timing of the upstream and downstream side open / close means.

Description

technical field [0001] The present invention relates to a drug solution injector for administering a small amount of drug solution to a blood vessel, an epidural space, or subcutaneously. The invention particularly relates to a liquid medicine injection device, which can stably provide a preset injection speed for a long time without being affected by the type of liquid medicine and the ambient temperature. Background technique [0002] Among medical solutions such as antibiotics, anticancer agents, and anesthetics, there are substances that need to be administered in small amounts to blood vessels, epidural space, or subcutaneously over a long period of time. As the drug solution injection device used in such a drug administration method, there are conventionally known syringe pump types, which use a power such as a motor to slowly squeeze the plunger of the syringe to inject the drug solution; and roller pump types, which are slowly squeezed with a roller. Press the tube ...

AI Technical Summary

Problems solved by technology

[0014] In this way, the liquid medicine injector connected to the flow control unit composed of a small-diameter tube in the pressurized liquid medicine supply device has a problem that the viscosity of the liquid medicine changes according to the type and temperature of the medicine liquid, and there is a problem that a predetermined constant cannot be obtained. Disadvantages of injection speed

[0015] As mentioned above, conventionally known liquid medicine injectors have disadvantages that they cannot be used for a long time unless a large battery is used, or that the speed of liquid medicine injection is affected by the type and temperature of the liquid medicine.

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