For Dr. David Kraus, linearity and precision matter in his biomedical research. Imagine being suspended in time-having your metabolism slow, heart rate decrease, and temperature drop. This is what Dr.

Peak flow meters are portable devices that are easy to use at home, in school, or on the go. They’re used to measure a person’s ability to exhale air forcefully out of their lungs. If you have a ...

A peak flow meter is a tool that measures the peak expiratory flow rate (PEFR). The PEFR is the amount of air a person can quickly force out of their lungs in one breath. Using a peak flow meter ...