Exercise responses in pregnant sheep: blood gases, temperatures, and fetal cardiovascular system.
Exercise responses in pregnant sheep: blood gases, temperatures, and fetal cardiovascular system.
复制标题
怀孕羊的运动反应:血气、体温和胎儿心血管系统。
DOI:
10.1152/jappl.1983.55.3.842
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发表时间:
1983
期刊:
影响因子:
--
通讯作者:
Longo,LD
中科院分区:
文献类型:
--
作者:
Lotgering,FK;Gilbert,RD;Longo,LD
In an effort to examine the effects of maternal exercise on the fetus we measured maternal and fetal temperatures and blood gases and calculated uterine O2 consumption in response to three different treadmill exercise regimens in 12 chronically catheterized near-term sheep. We also measured fetal catecholamine concentrations, heart rate, blood pressure, cardiac output, blood flow distribution, blood volume, and placental diffusing capacity. Maternal and fetal temperatures increased a mean maximum of 1.5 +/- 0.5 (SE) and 1.3 +/- 0.1 degrees C, respectively. We corrected maternal and fetal blood gas values for the temperatures in vivo. Maternal arterial partial pressure of O2 (PO2), near exhaustion during prolonged (40 min) exercise at 70% maximal O2 consumption, increased 13% to a maximum of 116.7 +/- 4.0 Torr, whereas partial pressure of CO2 (PCO2) decreased by 28% to 27.6 +/- 2.2 Torr. Fetal arterial PO2 decreased 11% to a minimum of 23.2 +/- 1.6 Torr, O2 content by 26% to 4.3 +/- 0.6 ml X dl -1, PCO2 by 8% to 49.6 +/- 3.2 Torr, but pH did not change significantly. Recovery was virtually complete within 20 min. During exercise total uterine O2 consumption was maintained despite the reduction in uterine blood flow because of hemoconcentration and increased O2 extraction. The decrease of 3 Torr in fetal arterial PO2 and 1.5 ml X dl -1 in O2 content did not result in major cardiovascular changes or catecholamine release. These findings suggest that maternal exercise does not represent a major stressful or hypoxic event to the fetus.
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DOI:
--
发表时间:
1965
期刊:
Journal of Physiology
影响因子:
--
作者:
R. Comline;I. Silver;M. Silver
通讯作者:
M. Silver
影响因子:
4.3
作者:
T. Pyörälä
通讯作者:
T. Pyörälä
DOI:
10.1152/ajplegacy.1970.219.1.217
发表时间:
1970
期刊:
The American journal of physiology
影响因子:
--
作者:
F. Battaglia;H. McGaughey;E. Makowski;G. Meschia
通讯作者:
G. Meschia
DOI:
10.1152/jappl.1979.46.4.828
发表时间:
1979
期刊:
Journal of applied physiology: respiratory, environmental and exercise physiology
影响因子:
--
作者:
R. D. Gilbert;L. A. Cummings;M. Juchau;L. Longo
通讯作者:
L. Longo
DOI:
10.1080/00365516509083359
发表时间:
1965
影响因子:
2.1
作者:
P. Astrup;K. Engel;J. Severinghaus;E. Munson
通讯作者:
E. Munson