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Table 4 Inspiratory muscle function and effort in weaned and unweaned patients

From: Determinants of weaning success in patients with prolonged mechanical ventilation

Group MIP, cm H2O Pdimax, cm H2O Pdisw/Pdimax, percentage TTdi
Successful weaning     
   T0 45.2 ± 19.5 34.9 ± 18.9a 36.0 ± 15.8a 0.13 ± 0.065b
   T1 57.3 ± 18.2b 43.0 ± 20.04a 23.1 ± 7.9a,b 0.08 ± 0.029
Failed weaning     
   T0 32.7 ± 18.2 25.4 ± 17.3 54.4 ± 25.5 0.21 ± 0.122a,b
   T1 38.6 ± 13.5b 27.7 ± 12.5 42.5 ± 22.9b 0.14 ± 0.054a
  1. aP < 0.05 differences for each variable within groups; bP < 0.05 differences for each variable between groups. MIP, maximum inspiratory pressure; Pdimax, maximum transdiaphragmatic pressure; Pdisw, tidal diaphragmatic pressure; TTdi, tension-time index of diaphragm.