The effect of electrode compression during fetal transcutaneous carbon dioxide monitoring.
The influence of electrode compression by the cervix on transcutaneous CO2 measurements (tc-Pco2) was studied during 20 deliveries by simultaneous measurements with two electrodes, one positioned under the cervical edge and the other free of the cervix. At a cervical dilation of less than 8 cm, significantly higher values were measured by the electrode exposed to cervical compression, and tc-Pco2 fluctuations with uterine contractions were observed. This study confirms that the tonsure effect usually does not interfere with tc-Pco2 monitoring.
D001785:Blood Gas Monitoring, Transcutaneous / Q000295:instrumentation / Q000379:methods*; D004566:Electrodes; D005260:Female; D005323:Fetal Monitoring / Q000295:instrumentation / Q000379:methods*; D006801:Humans; D011247:Pregnancy