There are 2 main companies, which manufacture these devices: Vapotherm which has a device that can deliver flow rates of up to 50 liter/min flow rates and Fisher Paykall who offers both the Optiflow as well as the AIRVO 2 devices which can both deliver flow rates of up to 60 liter/min...
FAST was a prospective study of 156 HF patients examining the relative sensitivity and unexplained detection rate of changes in intrathoracic impedance using OptiFlow (Medtronic) compared to monitoring changes in weight [27]. Sensitivity was greater (76% versus 23%; p < 0.0001) and unexplained ...