Requiem for a heavyweight: the demise of scalp blood pH sampling

Fetal scalp blood pH sampling has played a valuable role in the development of our understanding of fetal welfare in labor and in the interpretation of electronic fetal heart rate patterns. There is question as to the feasibility of retaining this practice in modern obstetric care because of the advance of science, the general reliance on fetal monitoring criteria for ascertaining fetal well-being, the logistic difficulties involved in obtaining accurate and timely samples, the economic consequences of having to maintain analytic equipment in working order in times of very infrequent use, and the poor correlation between pH alterations and predictable neurologic consequences in the child. As it has all but vanished from use in most clinical care centers, and the principal argument for retaining it ultimately references the physician as the beneficiary, the author proposes that it should be removed from any possible association with purported "standards of care."