Description

The spray of the ultrasonic nebulizer has no selectivity for the mist particles, so most of the drug particles can only be deposited in the upper respiratory tract such as the mouth and throat, and because of the small deposition in the lungs, it can not effectively treat the lower respiratory tract diseases. At the same time, because the mist particles generated by the ultrasonic atomizer are large and atomized quickly, the patient inhales too much water vapor, which humidifies the respiratory tract. The dry and thick secretion that partially blocked the bronchi in the respiratory tract expands after absorbing water, increasing the resistance of the respiratory tract, which may cause anoxia. Moreover, the ultrasonic atomizer will cause the drug solution to form water droplets and hang on the inner cavity wall, which has poor effect on lower respiratory tract diseases and has a large demand for drugs, Causing waste.