Abstract
A new PO2 electrode mounted in the tip of a 5F umbilical artery catheter was used in 36 newborn infants with severe respiratory illnesses 28 of whom survivied. 37 electrodes were used. The median age at insertion was 4 /range 1/2–122/ hr. 3 electrodes failed to work and they were removed or replaced, and 2 could not be properly evaluated. 32 electrodes functioned satisfactorily after a onepoint calibration against blood sampled through the catheter. 22 did not need recalibration until they were removed after 10–109/mean 88/ hr. 4 of the remaining 10 electrodes were recalibrated once after 33–97 hr and then functioned until removed 15–55 hr later; and the other 6 electrodes failed after 32–105/mean 49/ hr. Complications were few. 356 arterial blood samples obtained after the initial calibration and before any recalibration was required gave a correlation coefficient of 0.93/p<0.0001/ against independent system /Radiometer Type E5046 O2 electrode/. We conclude that the cathetertip electrode is a safe and reliable instrument for continuously recording PaO2 in infants.
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Conway, M., Durbin, G., McIntosh, N. et al. CONTINUOUS MONITORING OF ARTERIAL OXYGEN TENSION USING A CATHETER-TIP POLAROGRAPHIC ELECTRODE IN INFANTS. Pediatr Res 9, 859 (1975). https://doi.org/10.1203/00006450-197511000-00044
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DOI: https://doi.org/10.1203/00006450-197511000-00044