Abstract
Intellivent-ASV (iASV) is the newest ventilation mode provided by Hamilton Medical. It makes a closed-loop system between the ventilator and patients who require oxygenation and ventilation monitoring. We ventilated 22 patients using iASV after cardiac surgery. The closed-loop system of ventilation control is very convenient because patients show increased CO2 exhalation in the early phase after cardiac surgery. Because of an unstable circulation, anesthesiologists either do not initiate or discontinue automatic oxygenation control system (FIO2 and PEEP settings) and auto SBT (Quick Wean).
Fully automated weaning after cardiac surgery was successfully achieved with the iASV in about 50% of patients in this study. However, the usefulness of fully automated weaning using iASV in a closed or semi-closed ICU is still not well understood because of the lack of advanced circulatory regulation systems.
