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Continuous acid‐base assessment of the human fetus during labour by tissue pH and transcutaneous carbon dioxide monitoring
Author(s) -
NICKELSEN CARSTEN,
THOMSEN STEN G.,
WEBER TOM
Publication year - 1985
Publication title -
bjog: an international journal of obstetrics and gynaecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.157
H-Index - 164
eISSN - 1471-0528
pISSN - 1470-0328
DOI - 10.1111/j.1471-0528.1985.tb01086.x
Subject(s) - umbilical artery , pco2 , fetus , carbon dioxide , acid–base reaction , medicine , anesthesia , acid–base homeostasis , chemistry , pregnancy , biology , organic chemistry , genetics
Summary. Simultaneous monitoring of fetal tissue pH (t‐pH) and transcutaneous carbon dioxide (Tc‐ P co 2 ) was performed in 30 labours. Both t‐pH and Te‐ P co ‐2 at delivery were positively correlated with pH ( r = 0·69) and P co 2 ( r = 0·68) of the umbilical artery blood. A tissue/transcutaneous standard base excess (t‐SBE) was derived from the t‐pH and the Tc‐ P co 2 and calculated for 13 fetuses a t delivery; there was a correlation with standard base excess of umbilical artery blood. An analysis of t‐pH and Tc‐ P co 2 changes during the last hour of labour revealed that only infants who were born with decreased pH of the umbilical artery blood had decreasing t‐SBE, while all others had a constant t‐SBE.