Fig. 6.

Demonstration of the ability of the valve operation with identical respiratory loads. Data from each of the outlets (blue and orange) are shown against data from the Evita V500 (Dräger, Germany) (green), clipped $⩾0L·{\mathit{min}}^{-1}$. The artefact after each inspiration is associated with physical movement within the respiratory circuits; the actuation of the valve, and also one-way vales oscillating.