This device is used to measure Peak Expiratory Flow (PEF) and Forced
Expiratory Volume in 1-second (FEV1) in both children and adults. PEF is
the fastest speed air can be blown out of the lungs after inhalation.
FEV1 measures the volume after exhaling in 1-second. Peak Flow (PEF) and
Forced Expiratory Volume in 1-second (FEV1) measurements can tell how
well lungs are breathing by monitoring airflow. Doctors can have
patients monitor changes in airflow and record the results. The
automatic memory stores and provides easy access to the last 240
readings along with the time and date.
Warranty : 90days
B000BH8TUA 300835783548 _mai