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Table 4 Adjustment of mechanical ventilation settings following ABG analysis

From: Self-reported attitudes versus actual practice of oxygen therapy by ICU physicians and nurses

  FiO225% to 40% (n = 37,172) FiO240% to 60% (n = 23,466) FiO260% to 80% (n = 4,318) FiO280% to 100% (n = 2,041) Total (n = 68,222)
PaO2 13.4 (4.1) 12.6 (5.2) 12.3 (6.6) 16.0 (13.7) 13.1 (5.2)
SpO2 98.0 (2.9) 96.5 (3.8) 94.3 (6.3) 89.7 (12.5) 96.9 (4.6)
PEEP 5.6 (3.4) 7.3 (4.4) 9.1 (5.6) 9.0 (6.3) 6.5 (4.2)
PaO 2 range (kPa) Delta FiO 2 (%) Delta PEEP (cm H 2 O) No decrease in FiO 2 or PEEP (%) Delta FiO 2 (%) Delta PEEP (cm H 2 O) No decrease in FiO 2 or PEEP (%) Delta FiO 2 (%) Delta PEEP (cm H 2 O) No decrease in FiO 2 or PEEP (%) Delta FiO 2 (%) Delta PEEP (cm H 2 O) No decrease in FiO 2 or PEEP (%) Delta FiO 2 (%) Delta PEEP (cm H 2 O) No decrease in FiO 2 or PEEP (%)
<7 +6.1 (13.8) +0.3 (3.2) 87.6 +5.4 (13.2) +0.7 (3.7) 81.3 +2.0 (14.5) +0.6 (6.0) 86.3 −7.0 (16.8) +1.0 (6.7) 76.9 +3.0 (14.8) +0.7 (4.3) 83.3
7 to 10 +2.6 (6.7) +0.1 (3.1) 81.9 +1.6 (7.3) +0.2 (4.0) 80.3 −0.2 (9.4) +0.3 (5.2) 80.8 −6.7 (14.8) +0.1 (5.9) 76.5 +1.3 (8.3) +0.2 (3.8) 80.8
10 to 15 +0.6 (4.9) −0.2 (2.7) 72.9 −1.5 (6.6) −0.2 (3.8) 48.2 −5.2 (9.2) +0.1 (4.9) 33.7 −15.6 (19.2) +0.4 (5.7) 31.1 −0.6 (6.7) −0.1 (3.2) 62.3
15 to 20 −0.3 (5.1) −0.3 (2.7) 65.0 −4.8 (7.2) −0.3 (3.3) 25.1 −11.2 (11.4) +0.1 (4.7) 13.5 −20.4 (20.5) +0.0 (4.7) 23.6 −2.0 (7.3) −0.2 (3.0) 52.8
20 to 25 −1.2 (6.4) −0.2 (2.4) 54.2 −6.1 (9.0) −0.4 (3.0) 22.1 −12.7 (12.4) −0.4 (5.3) 11.8 −25.9 (21.7) −0.1 (4.8) 21.3 −4.2 (10.1) −0.3 (2.9) 40.4
25 to 30 −1.6 (7.0) −0.4 (2.8) 51.6 −7.2 (9.6) −0.3 (2.7) 18.8 −19.0 (12.1) −0.4 (3.8) 9.2 −25.3 (21.6) −0.1 (4.8) 22.9 −7.1 (12.2) −0.3 (2.9) 32.0
>30 −1.0 (6.6) −0.4 (4.0) 69.8 −3.5 (9.6) −0.4 (4.5) 43.0 −15.4 (15.8) +0.3 (5.7) 24.8 −33.6 (23.2) −0.4 (4.0) 14.3 −5.7 (15.9) −0.3 (4.2) 51.6
  1. Data are means (±SD), unless stated otherwise. Delta = difference between two successive ABG samples.