Expiration Cut-off Valve
grabcad
A valve engineered to seal off the expiration path of a ventilator tube when the inspiration line pressure surges out of control. An expiration cut-off valve crafted to be disposable and easy to use. The valve should be placed as close as possible to the endotracheal tube. Adapter cups designed for 1 inch ID tubing are available. Application: 1. Spring relaxed, Expiration orifice open, Patient exhaling freely 2. Ventilator detects expiration flow dwindling or expiration timeout expires if in mandatory mode 3. Pressure in inspiration line spikes and exceeds 4 cmWC 4. Piston compresses spring, Expiration orifice sealed shut, Patient inhaling smoothly 5. Lung and inspiration line pressure balance out, Ventilator cuts off airflow to patient 6. Remaining pressure in inspiration line released through pressure pull-down holes 7. Piston returns to its resting position, Inspiration line securely closed
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