Perinatal features and umbilical cord blood gases
in newborns complicated with nuchal cord.
Since normal room air (21% O,) has a Po, of 159 mm Hg and a PC[O.sub.2]of less than 1 mm Hg, exposure of cord blood gases
to air bubbles will significantly increase the P[O.sub.2] and markedly reduce the PC[O.sub.2] values of the sample.
Upon delivery, the infant cried spontaneously, had normal Apgar scores, and had normal cord blood gases
. He was taken to the newborn nursery where he ate well, had good color and muscle tone and did not experience any seizures or other neonatal complications.
PHILADELPHIA -- The routine measurement of umbilical cord blood gases
after every delivery could help answer questions about the possibility of birth asphyxia a few years after the fact, often exonerating obstetricians, Dr.
Determination of cord blood gases
and pH is recommended in all neonates with low Apgar scores to distinguish metabolic acidosis from hypoxemia or from other causes that might result in low Apgar scores .
* DEFENDANTS' DEFENSE The baby recovered well after being slightly depressed at birth; umbilical cord blood gases
were in the normal range.
Mild placental abruption was noted; the child had low Apgar scores, decreased respiratory effort, and low cord blood gases
. Diagnoses of birth depression and hypoxic-ischemic encephalopathy were given, and periventricular leukomalacia was evident on head imaging.