Single-pass medicine pumping repeated injection pneumatic needleless injector with adjustable dosage

Abstract

The invention discloses a single-pass medicine pumping repeated injection pneumatic needless injector with the adjustable dosage. The single-pass medicine pumping repeated injection pneumatic needless injector comprises a disposable ampule, a barrel, an emission cavity, a dosage adjusting unit, a tail hood and a power unit. The dosage adjusting unit comprises a speed reducer, a magnetic dosage adjusting base, a piston and a trip rod. The power unit comprises a transmission flexible shaft, a program control air source and a program control motor. The program control air source and the program control motor are adopted as an output power source, on the basis of fixed software programming, single-pass medicine pumping repeated injection can be achieved, the dosage and injection depth are automatically adjusted, no manual regulation is needed, and intracutaneous, subcutaneous and intramuscular injection is achieved; the disposable ampule is adopted as the liquid medicine storage environment, and cross infection is avoided.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to an adjustable-dose pneumatic needle-free injector for single-drawing and multiple-injection. Background technique [0002] Needle-free syringes do not need to use needles when injecting drugs, and use the principle of high-pressure jets to make the liquid medicine form a finer fluid, which instantly penetrates the skin and reaches the subcutaneous area. [0003] Needle-free injection can not see the needle, the psychological resistance to treatment will be minimized, and the compliance of treatment will be improved, especially for children with diabetes. Needle-free injection can bring many benefits to diabetic patients, such as greatly reducing the pain caused by needle-based syringes, and avoiding the formation of induration at the injection site after repeated injections. [0004] Most of the existing needle-free injector products that can be injected continuously are spring-dr...

AI Technical Summary

Problems solved by technology

[0004] Most of the existing needle-free injector products that can be injected continuously are spring-driven needle-free injectors, which are small in size, light in weight, and easy to carry. However, after each injection is completed, a special reset device is required to recompress the spring to store energy. The operation process is too cumbersome; at the same time, the injection dose and injection depth can rarely be adjusted, which makes the same syringe unable to be used for injections of different groups of people and different parts

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