Comparison of continuous transcutaneous and continuous intravascular Po2 measurement in fetal sheep

C. A.M. Jansen; F. G. Bass; K. C. Lowe; P. W. Nathanielsz

doi:10.1016/0002-9378(80)90086-1

Comparison of continuous transcutaneous and continuous intravascular Po₂ measurement in fetal sheep

C. A.M. Jansen, F. G. Bass, K. C. Lowe, P. W. Nathanielsz

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

Continuously monitored carotid arterial Po₂ (Pao₂) and transcutaneous Po₂ (tcPo₂) from the scalp of fetuses from ewes not in labor have been compared under epidural anesthesia at different levels of fetal oxygenation. A reasonably good correlation existed between the two readings at normal and high Po₂ values. In sharp contrast, at low Pa(o₂) levels there was a considerable bias between the two. Since this bias was variable, the failure of tcPo₂ to reflect Pa(o₂) accurately at low Pa(o₂) renders the use of the tcPo₂ electrode questionable in the very situation for which it was advocated, namely, the prediction of fetal compromise.

Original language	English (US)
Pages (from-to)	670-676
Number of pages	7
Journal	American Journal of Obstetrics and Gynecology
Volume	138
Issue number	6
DOIs	https://doi.org/10.1016/0002-9378(80)90086-1
State	Published - Jan 1 1980
Externally published	Yes

ASJC Scopus subject areas

Obstetrics and Gynecology

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abstract = "Continuously monitored carotid arterial Po2 (Pao2) and transcutaneous Po2 (tcPo2) from the scalp of fetuses from ewes not in labor have been compared under epidural anesthesia at different levels of fetal oxygenation. A reasonably good correlation existed between the two readings at normal and high Po2 values. In sharp contrast, at low Pa(o2) levels there was a considerable bias between the two. Since this bias was variable, the failure of tcPo2 to reflect Pa(o2) accurately at low Pa(o2) renders the use of the tcPo2 electrode questionable in the very situation for which it was advocated, namely, the prediction of fetal compromise.",

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AU - Bass, F. G.

AU - Lowe, K. C.

AU - Nathanielsz, P. W.

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AB - Continuously monitored carotid arterial Po2 (Pao2) and transcutaneous Po2 (tcPo2) from the scalp of fetuses from ewes not in labor have been compared under epidural anesthesia at different levels of fetal oxygenation. A reasonably good correlation existed between the two readings at normal and high Po2 values. In sharp contrast, at low Pa(o2) levels there was a considerable bias between the two. Since this bias was variable, the failure of tcPo2 to reflect Pa(o2) accurately at low Pa(o2) renders the use of the tcPo2 electrode questionable in the very situation for which it was advocated, namely, the prediction of fetal compromise.

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