Table.

Arterial Umbilical Cord Gas Values

pHPco2 (mm Hg)Po2 (mm Hg)Base Excess
Normal*≥7.20 (7.15 to 7.38)<60 (35 to 70)≥20≤–10 (−2.0 to −9.0)
Respiratory acidosis<7.20>60Variable≤–10
Metabolic acidosis<7.20<60Variable≥–10
Mixed acidosis<7.20>60Variable≥–10
  • * Normal ranges from Obstet Gynecol Clin North Am. 1999;26:695.