Pneumatic type needleless injection driving gas pressure switching device and using method thereof

Abstract

The invention provides a pneumatic type needleless injection driving gas pressure switching device. The pneumatic type needleless injection driving gas pressure switching device comprises a power source, a time control mechanism, a gas inlet pipe, a main path electromagnetic reversing valve, a main flow pipe, a flow dividing electromagnetic reversing valve, an upper branch flow pipe, a lower branch flow pipe, a gas pressure adjusting assembly and a gas outlet pipe. The time control mechanism comprises a starting switch, a first time relay and a second time relay. The gas pressure adjusting assembly comprises an upper branch flow pressure adjusting valve and an upper branch flow quick exhaust valve. During power failure and ventilation, the upper branch flow pressure adjusting valve and a lower branch flow pressure adjusting valve are adjusted, so that a gas pressure value of pressurized gas in the upper branch flow pipe is greater than that of pressurized gas in the lower branch flow pipe; during power on and ventilation, the pressurized gas in the upper branch flow pipe is exhausted from the gas outlet pipe and used for providing power for an injector, liquid medicine in the injector instantly penetrates through the skin to reach the subcutaneous position, and needleless injection is achieved; and the pressurized gas in the lower branch flow pipe is exhausted from the gas outlet pipe and used for providing power for the injector, so that liquid medicine in the injector is fully absorbed by human tissue, and the liquid medicine injection efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of medical injection, in particular to a pneumatic needle-free injection driving air pressure switching device and a method for using the same. Background technique [0002] Needle-free injection means that the liquid drug directly enters the body tissue in the form of ultra-fine, high-speed, and straight-line high-pressure jets without the use of needles during drug injection, thus solving a series of problems caused by traditional injections caused by needles piercing the body . [0003] Needle-free injection is a new type of small-dose injection method, which uses the principle of high-pressure jets to make the liquid penetrate the skin instantly and reach the subcutaneous area. At present, the application of pneumatic needle-free injectors is less, and the research at home and abroad is relatively late, and the technology is not mature enough. The main reason is: the injection time is extremely short, ...

AI Technical Summary

Problems solved by technology

At present, the application of pneumatic needle-free syringes is less, and the research at home and abroad is relatively late, and the technology is not mature enough

The main reason is: the injection time is extremely short, the injection pressure is basically kept at a constant value, that is, the pressure required to destroy the epidermis, and the driving pressure cannot be reduced, resulting in excessive injection pressure during the liquid diffusion stage, which seriously affects the injection efficiency and even stimulates the Severe pain or tissue destruction caused by the patient's nerve endings

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