AMBU 'E' VALVE

Typical Number in Hospital:

Cost Bands: 1

References: 2

This is an expiratory valve for use in an anaesthetic breathing circuit which has been designed to prevent the passage of expired gases back into the breathing circuit and reservoir bag. Unintentional rebreathing of expired gases is a problem when using the conventional Magill circuit for controlled or assisted ventilation. The reservoir bag, being empty at the end of inspiration, tends to fill partially with expired gas during the expiratory phase. The Ambu 'E' valve is a two-stage valve fitted in place of the usual expiratory valve which makes sure that expired gases are directed out of the breathing circuit altogether. The Ruben's valve is intended to achieve the same result but with slightly different construction.