Table 4.

Blood Gases and Acid Base Status

0 Min10 Min30 Min
Room AirOxygenRoom AirOxygenRoom AirOxygen
pO2 mm Hg31  (17)a 30  (22)b 76  (32)a 87  (49)d 74  (29)e 89  (42)f *
pCO2 mm Hg50  (15)50  (19)b 39  (14)c 38  (13)d 32  (13)g 30  (11)h
pH7.11  (0.14)i 7.12  (0.18)j 7.17  (0.11)k 7.15  (0.13)l 7.25  (0.10)m 7.26  (0.12)n
BD mmol/L14.7  (6.1)o 14.2  (6.7)p 14.0  (5.0)q 14.5  (5.4)r 11.2  (5.2)s 12.1  (5.8)t
  • a n = 107,b  n = 127,c  n = 69, d  n= 80, e  n = 115,f  n = 156,g  n = 116,h  n = 157,i  n = 166,j  n = 197,k  n = 134,l  n = 135,m  n = 192,n  n = 219,o  n = 154,p  n = 177,q  n = 132,r  n = 134,s  n = 188,t  n = 207.

    Mean (SD) values are given. Po 2 and Pco 2 are from arterial blood. pH and base deficit (BD) at 0 min are from either umbilical vein or artery and at 10 and 30 minutes after birth from either capillary or artery.

  • * P = .002 compared with room air value.