Problems of Foetal Blood Sampling

SummaryThe second stage of labour is associated with relative fetal hypoxia and progressive metabolic acidosis. Maternal analgesia can increase the danger, especially for the high-risk fetus.In 152 patients the effect on the fetus of pethidine alone, pethidine + trichloroethylene, or pethidine + Entonox was assessed by fetal scalp blood sampling. Fetal pH, Pco,, and Po2 were measured and base excess was calculated. Capillary samples were also taken 45 to 60 minutes after birth in 88 of the babies to estimate the rate of neonatal recovery.Entonox proved safer than trichloroethylene, and babies treated with it maintained their Po2 before birth, had better Apgar scores at birth, and one hour later were significantly less acidotic and much better oxygenated.

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Complications of Fetal Blood Sampling During Labor: The Pediatrician Should Always Be Informed When Scalp Samples Have Been Taken

Modanlou¹,

Smith²,

Paul³

et al. 1973

Clin Pediatr (Phila)

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During an 18-month period of monitoring at Los Angeles County-University of Southern California Medical Center, two instances of persistent bleeding from the puncture sites in the fetal scalp, which were traced to coagulation abnormalities, and one of accidental breakage and retention of the blade used for scalp puncture were encountered. Whenever fetal blood sampling is performed during delivery, one should be certain that scalp bleeding has stopped. Continuing pressure will generally achieve hemostasis, but at times a surgical clip must be applied. When these measures fail, the infant should be delivered promptly and coagulation studies done. The pediatrician should always be informed when scalp samples have been taken.

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Problems of Foetal Blood Sampling

Cited by 5 publications

References 6 publications

Oxygen administration during labor

Oxygen administration during labor

Comparative Effect of Pethidine, Trichloroethylene, and Entonox on Fetal and Neonatal Acid-Base and Po2

Complications of Fetal Blood Sampling During Labor: The Pediatrician Should Always Be Informed When Scalp Samples Have Been Taken

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