The specific method is: insert the sterilized spirometer interface into the measuring part of the spirometer. After the meter sends the first measurement instruction, take a deep breath, and then blow as much as possible to measure the vital capacity level. After the measuring instrument sends out the second measurement instruction, take a deep breath again and blow as hard as possible. The instrument automatically takes the maximum value as the measured value and stores it in the handheld terminal.

note:

(1) When blowing, the airflow cannot be interrupted. Once interrupted, the instrument will automatically record the end of the measurement.

(2) When blowing, the nozzle should be close to the face, and the blown gas cannot overflow through the gap between the nozzle and the face, otherwise it will affect the measurement results.

(3) After the measurement, the blowing nozzle should be put into a bucket or box for centralized disinfection.