Heart Rate and PO2 in the Fetal Lamb
Information about fetal oxygenation in chronically catheterized animal subjects has previously depended on intermittent measurement of PO2 or O2 saturation in blood samples withdrawn from intravascular catheters. Recently, the performance and durability of implanted oxygen electrodes in both blood and tissue has improved. Thus, continuous monitoring of oxygen levels over many hours or days is now possible and we have previously reported (1) our experience with implantation of galvanic PO2 electrodes in fetal and maternal tissues in the pregnant ewe.
KeywordsFetal Heart Rate Intrauterine Growth Retardation Late Gestation Fetal Sheep Uterine Activity
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- 1.M.E. Towell, I. Regier, I. Lysak, D. Sayler, and S.P. Bessman, Maternal and fetal tissue PO2 in the pregnant ewe measured with galvanic PO2 electrodes, in: “Proceedings of the 5th International Symposium of I.S.O.T.T., Advances in Exp. Med. and Biol.”, pp. 37, Plenum Publishing Corporation, New York (1983).Google Scholar
- 3.M.E. Towell, I. Lysak, D. Sayler, E.C. Layne, I. Regier, and S.P. Bessman, Maternal and fetal tissue PO2 in the pregnant ewe. International Workshop on Fetal Breathing and Other Measurements, Oxford, England (1980).Google Scholar
- 7.K.J. Dalton, G.S. Dawes and J.E. Patrick, Diurnal respiratory and other rhythms of fetal heart rate in lambs, Am. J. Obstet. Gynecol. 127:144 (1977).Google Scholar
- 12.C.E. Blanco, G.S. Dawes, M.A. Hanson and H.B. McCooke, The arterial chemoreceptors in fetal sheep, J. Physiol. 330: 38P (1982).Google Scholar