Assessment of fetal scalp oxygen saturation determination in the sheep by transmission pulse oximetry

Article Abstract:

The Spiral O(sub 2)CTG pulse oximeter from Respironics Inc. appears to be effective in monitoring fetal oxygen levels, according to a study in sheep. The device is placed directly on the fetal scalp and gave readings comparable to those from devices that measure oxygen levels in blood.

Evaluation, Product information, Equipment and supplies, Measurement, Oxygen, Oxygen in the body, Fetal monitoring, RESP, Blood gases, Oximetry, Respironics Georgia Inc., HDTC

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Regulation of hypothalamic arginine vasopressin messenger ribonucleic acid and pituitary arginine vasopressin content in fetal sheep: effects of acute tonicity alterations and fetal maturation

Article Abstract:

The significantly inverse relationship between hypothalamic arginine vasopressin messenger ribonucleic acid and pituitary arginine vasopressin content in the sheep fetus may indicate a functioning feedback loop in terms of maintaining fluid homeostasis. Researchers observed the effects of severe maternal dehydration and salt depletion on fetal development in the context of arginine vasopressin status.

Models, Maternal-fetal exchange, Fetus, Growth, Physiological regulation, Dehydration (Physiology), Fetal development, Body fluids

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Maternal 1-deamino-8-D-arginine-vasopressin-induced sequential decreases in plasma sodium concentration: ovine fetal renal responses

Article Abstract:

The drug 1-deamino-8-D-arginine-vasopressin (DDAVP) might be useful in treating oligohydramnios. Oligohydramnios is decreased amniotic fluid and can have disastrous consequences for the fetus. Researchers gave seven pregnant sheep DDAVP, which caused their blood sodium levels to drop. Their fetuses experienced a similar drop in blood sodium and began to excrete more urine. Ultimately, this would lead to increased amniotic fluid. A 53% increase in fetal urine production could result from a small drop in sodium levels of 5 to 7 milli-equivalents per liter.

Research, Hyponatremia, Oligohydramnios

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