Abstract
PtcO2 and PtcCO2 were monitored in 18 critically ill neonates using a combined sensor (Biochem International, Milwaukee). The in vitro response time of the electrode was less than 30 seconds. Electrode was calibrated using a 5% CO2, 95% N2 and 10% CO2 with 21% O2 at 43.5°C. The study was carried out in two phases. Arterial blood gases were obtained from umbilical artery catheter for correlation. During the second phase, a new sensor with smaller cathode and a teflon membrane was used. Data from both phases are shown below. Both PtcO2 and PtcCO2 correlated better with arterial values in the second phase. Arterial O2 and CO2 ranged from 37 to 286 mmHg and 14 to 51 mm Hg, respectively. No complications were noted during the study. We conclude that 1) combined sensor can replace the two separate heated sensors; 2) the better correlation seen in the second phase is due to the decreased oxygen consumption by the sensor and better mechanical stabilization of the membrane.
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Bhat, R., Diaz-Blanco, J., Dahiya, U. et al. TRANSCUTANEOUS OXYGEN (PtcO2) AND CARBON DIOXIDE (PtcCO2) MONITORING IN SICK NEONATES USING A SIMPLE COMBINED SENSOR. Pediatr Res 18 (Suppl 4), 228 (1984). https://doi.org/10.1203/00006450-198404001-00809
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DOI: https://doi.org/10.1203/00006450-198404001-00809