Fixed and Variable High Flow Generators When caregivers respond to an emergency, time is essential and assessing a patients vital signs is crucial. If a patient is having difficulty breathing, perhaps due to a critical illness or injury, one treatment option is endotracheal intubation. However, intubation may lead to complications, such as infection and damage to a patients airway, and it is associated with longer hospital stays and increased treatment costs when compared with noninvasive ventilation.1,2 As an alternative to intubation for some patients, Philips offers the WhisperFlow continuous positive airway pressure (CPAP) system. Longer oxygen run times WhisperFlow is ideal for EMS use because it conserves oxygen while delivering therapeutic CPAP with superb pressure control. On a D-size oxygen cylinder, WhisperFlow fixed-flow systems may last two-to-three times longer than some competitors during transport.3 Should your protocol require greater FIO2 flexibility, Philips also offers a variable flow system for appropriate titration.