Q: What is the basic difference between 2 major modes of 'Bilevel' ventilation - BiPhasic and APRV (Airway pressure Release Ventilation) ?
A: "BiLevel" is relatively a newer mode of ventilation which allows patient to breath normally at any level of PEEP. It is a PC (pressure control) mode of ventilation that allows both spontaneous and mandatory breaths. It has 2 levels of PEEP;
- High PEEP (PEEPH) and
- Low PEEP (PEEPL)
BiPhasic: allows patient to breath at any level of PEEP.
APRV: allows patient to breath only at high PEEP. APRV has established Time High (TH) to breath on higher PEEP and smaller Time Low (TL) to relieve pressure.
Read good description here from puritanbennett site.
