efficiency monitoring of fetal heart rate with mobile battery

Description

The sprayer of the ultrasonic atomizer has no selectivity to the aerosol particles, so most of the drug particles generated can only be deposited in the mouth, throat and other upper respiratory tract, and because the amount of deposition in the lungs is small, it can not effectively treat lower respiratory tract diseases. At the same time, due to the large size and fast atomization of fog particles generated by the ultrasonic atomizer, patients will inhale too much water vapor, which will wet the respiratory tract. The dry and thick secretions in the respiratory tract that originally blocked the bronchi will expand after absorbing water, increasing the resistance of the respiratory tract, which may lead to anoxia. In addition, the ultrasonic atomizer will make the liquid medicine form droplets hanging on the wall of the inner cavity, which has poor effect on lower respiratory tract diseases and a large demand for drugs, Causing waste