Fetal blood sampling and gas exchange.
نویسنده
چکیده
منابع مشابه
Physiology of the placenta--gas exchange.
The placenta serves as the fetus' organ of gas exchange throughout intra-uterine life. While the dependence of fetal well-being on an intact maternal-placental unit has been recognized for centuries, it is only in the last several decades that research with fetal animals has begun to unravel the mechanisms by which it regulates blood supply and oxygen, as well as its role in the maternal-to-fet...
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A technique is described for studying the respiratory function of the placenta using carbon monoxide, a gas whose exchange across the placenta between the maternal and fetal circulations is limited by diffusion rather than blood flow. During the steady state before the introduction of CO, the normal concentration of carboxyhemoglobin in the ewe, [COHb](M), is approximately 0.90%, and that in th...
متن کاملUse of a combined oxygen and carbon dioxide transcutaneous electrode in the estimation of gas exchange during exercise.
BACKGROUND Accurate and reliable measurement of gas exchange during exercise has traditionally involved arterial cannulation. Non-invasive devices to estimate arterial oxygen (O2) and carbon dioxide (CO2) tensions are now available. A method has been devised and evaluated for measuring gas exchange during exercise with a combined transcutaneous O2 and CO2 electrode. METHODS Symptom limited ex...
متن کاملClinical experience on tcPco2 during labor.
tcPco2 measurements in the fetus during labor were evaluated by analysing the clinical experience in 224 cases. This additional mode of supervision was performed in combination with continuous cardiotocography (CTG) and intermittent fetal blood sampling (FBA) in cases with suspect, prepathologic or pathologic heart rate patterns. The prechosen measuring temperature was 39 degrees C in 105 and 4...
متن کاملFetal scalp sampling in labour.
In the linked randomised controlled trial, Wiberg-Itzel and colleagues compare the effectiveness of two methods of diagnosing hypoxia in the fetus during labour— scalp pH analysis and scalp lactate analysis.1 Fetal wellbeing during labour depends on several factors—an adequate supply of oxygenated maternal blood reaching the placental intervillous space, gas exchange across an undamaged placent...
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عنوان ژورنال:
- Journal of clinical pathology. Supplement
دوره 10 شماره
صفحات -
تاریخ انتشار 1976