During ippb administration, what ratio of inspiratory time to expiratory time should be allowed

IPPB stands for intermittent positive pressure breathing and the ratio or relationship between inspiratory time and expiratory time is I:E. The normal inspiratory-to-expiratory ratio value is 1:2, it means if inspiration will occur in 1 second then expiration will take 2 seconds but it can be greater than this. If IPPB is administrated with an inspiratory-to-expiratory ratio of 1:2 or greater sufficient time will be available that allow the heart and vessels to fill with the blood.

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