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Table 3 ABG analysis and baseline physiological data of each protocol before intervention

From: The short-term efficacy of high flow nasal oxygen therapy on cardiovascular surgical patients: a randomized crossover trial

 

Protocol A

Protocol B

p value

mean

(SD)

mean

(SD)

PaO2 (mmHg)

95.9

(23.4)

97.6

(25.7)

0.380

FiO2 (0.35/0.4/0.5)

9/7/1

9/4/5

0.177

PFR (mmHg)

252.8

(62.4)

230.0

(51.6)

0.248

PaCO2 (mmHg)

33.5

(3.4)

34.9

(2.9)

0.923

pH

7.428

(0.02)

7.434

(0.04)

0.641

HCO3 (mEq/L)

22.4

(2.4)

23.1

(1.7)

0.606

RR (rates/min)

19.2

(4.2)

20.4

(4.7)

0.428

HR (beats/min)

92.4

(11.6)

94.6

(9.0)

0.073

MAP (mmHg)

65

(10)

66

(8)

0.940

CCI (L/min/m2)

3.8

(0.8)

3.5

(0.6)

0.199

SvO2 (%)

71.9

(10.1)

73.2

(4.5)

0.674

  1. ABG Arterial blood gas, SD Standard deviation, PFR PaO2/FiO2 ratio, RR Respiratory rate, HR heart rate, MAP Mean arterial pressure, CCI Continuous cardiac index, SvO2 Mixed venous oxygen saturation