With the exception of setting the positive end-expiratory pressure (PEEP), the expiratory phase is commonly overlooked during MV. The expiratory time constant (RCexp) plays an important role in understanding the mechanical properties of the respiratory system in patients receiving mechanical ventilation. However, it is unclear that the effect of expiratory time constant on the ventilation and perfusion distribution.
With the exception of setting the positive end-expiratory pressure (PEEP), the expiratory phase is commonly overlooked during MV. The expiratory time constant (RCexp) plays an important role in understanding the mechanical properties of the respiratory system in patients receiving mechanical ventilation. However, it is unclear that the effect of expiratory time constant on the ventilation and perfusion distribution.
Study Type
OBSERVATIONAL
Enrollment
60
patients received different RCexp
Zhongda Hospital, School of Medicine, Southeast University
Nanjing, Jiangsu, China
RECRUITINGDifference in ventilation/perfusion mismatch
ventilation/perfusion mismatch is measured by EIT
Time frame: 4 hours
Difference in dead space
dead space is measured by EIT
Time frame: 4 hours
Difference in shunt
shunt is measured by EIT
Time frame: 4 hours
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