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Intensive Care Medicine Experimental

Table 4 The first, the second, and the third measured expiratory time constants (τ1, τ2, and τ3, respectively) in pressure-controlled ventilation (PCV) and volume-controlled ventilation (VCV)

From: Six methods to determine expiratory time constants in mechanically ventilated patients: a prospective observational physiology study

 

Measured τ1 (s)

Measured τ2 (s)

Measured τ3 (s)

p*

τ1 vs. τ2

p**

τ2 vs. τ3

p***

τ1 vs. τ3

PCV

0.59 (0.57–0.62)

0.39 (0.37–0.40)

0.29 (0.28–0.31)

 < 0.0001

 < 0.0001

 < 0.0001

VCV

0.60 (0.58–0.63)

0.39 (0.38–0.41)

0.30 (0.29–0.31)

 < 0.0001

 < 0.0001

 < 0.0001

  1. Data are shown as means with 95% confidence intervals
  2. *comparison between τ1 and τ2
  3. **comparison between the τ2 and τ3
  4. ***comparison between τ1 and the τ3
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