Patented device replacing bag-in-bottle, turbine and piston systems • Rebreathing fraction: 98%. Eco-friendly and cost-effective. • Fixed volume (1.2 l): Delivers precise tidal volumes with fast wash-in and wash-out, saving time and agent consumption. • Rigid and never empty: providing uninterrupted ventilation with effective leakage compensation. • No moving parts and open in both ends: providing less expiratory resistance. • Oxygen driven: minimizing the risk for hypoxia. • Safe and precise ventilation with significantly reduced anesthetic agent usage.