| Subject | English | Portuguese |
| comp., MS, Braz. | peak expiratory flow | pico de fluxo expiratório (The maximum volume of air exhaled during a forced expiration starting with the lungs fully inflated) |
| med. | peak expiratory flow measurement | débito expiratório máximo |
| med. | peak flow | pico do débito |
| gen. | peak flow | pico do fluxo |
| transp., energ.ind. | peak flow | fluxo máximo |
| gen. | peak flow | auge |
| comp., MS, Braz. | peak flow meter | medidor de pico de fluxo (A portable instrument that measures the flow of air during a forced expiration) |
| transp. | peak traffic flow | volume da nª hora de ponta anual |
| tech. | Wright's peak flow meter | peak-flowmeter |
| tech. | Wright's peak flow meter | fluxómetro de Wright |