TISSUE pH/pC02 AND CONTINUOUS BASE EXCESS MONITORING IN THE HUMAN FETUS

Weber, Tom; Nickelsen, Carsten

doi:10.1515/jpme.1988.16.s1.151

Cited by 2 publications

(2 citation statements)

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“…The electrode drift when using the KontronRoche® electrode is usually low, below 0.04 pH units and independent of the duration of the monitoring [10]. Following some training, the rate of unsuccessful monitoring is relatively constant, and the cause of failure is usually displacement of the electrode tip from the skin incision.…”

Section: Accuracy Of T-ph Monitoring Using the Glass Electrodementioning

confidence: 99%

“…Following some training, the rate of unsuccessful monitoring is relatively constant, and the cause of failure is usually displacement of the electrode tip from the skin incision. In a large series of 337 consecutive monitorings performed by the two authors [10] 67% of the monitorings were successful until the delivery, 10% were partly successful and 23% were unsuccessful as no stable value of t-pH was obtained (figure 1). In 20% of these cases the duration of monitoring was between 300 and 500 minutes (figure 2).…”

Section: Accuracy Of T-ph Monitoring Using the Glass Electrodementioning

confidence: 99%

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The current status of intrapartum continuous fetal tissue pH measurements

Nickelsen

Weber²

1991

Jpme

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Continuous tissue pH monitoring during labor has now been possible for 15 years. Tissue pH is measured in the intercellular fluid, and the value differs in some cases from the blood pH value because of local capillary flow and local metabolism. The fetal scalp seems to be an area where tissue pH and capillary blood pH values are very close, but in acute acidosis there may be a time lag of 10-15 min before tissue pH is equilibrated. Normal values of scalp tissue pH are 7.38 in early labor declining by 0.016 per hour during the first stage of labor and by 0.12 per hour during the second stage of labor. Tissue pH values below 7.15 are defined as pathological. The correlation coefficient to umbilical artery blood pH (0.71), success rate (67%) and electrode drift (below 0.04) from the largest study of tissue pH monitoring using glass pH electrodes (n = 337) are described.

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Section: Accuracy Of T-ph Monitoring Using the Glass Electrodementioning

confidence: 99%

Section: Accuracy Of T-ph Monitoring Using the Glass Electrodementioning

confidence: 99%