Introduction
Umbilical cord blood gas (UCBG) analysis is an objective method to assess the clinical condition, treatment plan and prognosis of the neonate. We aimed to determine the relation between the UCBG and early pulse oximetry parameters including perfusion index (PI) with maternal-neonatal demographic and clinical features.

Methods
300 neonates with gestational ages 30 to 41 weeks prospectively included in the study. UCBG obtained from all deliveries. PI and other pulse oximetry parameters in the first 30 minutes of birth were also obtained from 54 infants. Relationship between maternal-neonatal short term clinical morbidities and UCBG-PI parameters were evaluated.

Results
There are significant relations between the UCBG parameters (Base access, pH, pCO2, HCO3, bilirubin and lactate) and maternal smoking, preeclampsia, gestational hypertension, prematurity, small for gestational age and infants born less than 2000 g. Postnatal groaning was associated with low pH and HCO3. Also need for mechanical ventilation was associated with elevated base excess. There are no statistically significant relation between the early PI and demographic features and clinical morbidities.

Conclusion
UCBG analysis may provide important information about the past, present and possibly the future condition of the infant.

0487 - BEYOND THE ACID BASE STATUS: UMBILICAL CORD BOOD GAS ANALYSIS AND PULSE OXIMETRY PARAMETERS AFTER BIRTH