TABLE 1.

Mechanical Support, Ventilation, and Oxygenation

SIMVSIMV+VG 4.5SIMV+VG 3.0
PIP (cmH2O)15.4 ± 1.714.2 ± 2.411.7 ± 2.9*
MAP (cmH2O)5.3 ± 1.44.9 ± 1.3*4.4 ± 0.53*
VT mech (mL/kg)5.9 ± 0.84.8 ± 0.4*4.2 ± 0.6*
VT mech > 7 mL/kg (%)16 ± 126 ± 4*4 ± 3*
VT spont (mL/kg)2.5 ± 0.63.3 ± 0.7*3.6 ± 0.5*
Mechanical rate (breaths/min)16 ± 315 ± 312 ± 4*
Spontaneous rate (breaths/min)41 ± 1546 ± 11*51 ± 10*
Total rate (breaths/min)57 ± 1261 ± 9*63 ± 8*
Fio20.23 ± 0.0240.23 ± 0.0230.23 ± 0.018
Spo2 (%)94 ± 2.194 ± 2.495 ± 1.5
TcPco2 (mmHg)46.8 ± 11.548.2 ± 13.452.0 ± 11.0
  • Mean ± SD.

  • * P < .05 versus SIMV.

  • P < .05 versus SIMV + VG 4.5.

  • Refers to effective mechanical rate.