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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
01/08/1992 |
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Data da última atualização: |
24/07/2025 |
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Autoria: |
OAKES, G. K.; WALKER, A. M.; EHRENKRANZ, R. A.; CEFALO, R. C.; CHEZ, R. A. |
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Título: |
Uteroplacental blood flow during hypperthemia with and without respiratory alkalosis. |
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Ano de publicação: |
1976 |
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Fonte/Imprenta: |
Journal of Applied Physiology, v. 41, n. 2, p. 197-201, 1976. |
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DOI: |
10.1152/jappl.1976.41.2.197. |
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Idioma: |
Inglês |
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Notas: |
Comparative study. |
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Conteúdo: |
Abstract: The effect of induced maternal hyperthermia (1.5 degrees C rise over 60 min) on the uterine and umbilical circulations was examined in two groups of chronically instrumented pregnant sheep. Hyperventilation occurred in both groups. In the group in which the resultant respiratory alkalosis was untreated (N = 5), uterine blood flow decreased to 53 +/- 3% (mean +/- SE; P less than 0.01) of control at maximal maternal temperature. Umbilical blood flow also decreased 30 +/- 6% (P less than 0.01) below control levels. In the other group, normocapnia was maintained (N = 4). Uterine blood flow decreased in this group to 75% +/- 2% (P less than 0.01) of control levels, but umbilical blood flow did not significantly change. There was no significant change in maternal or fetal mean arterial pressure during hyperthermia in either group. Thus, maternal hyperthermia per se results in a significant decrease in uterine blood flow primarily through an effect on uterine vascular resistance, but without a concomitant change in umbilical blood flow. |
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Palavras-Chave: |
Blood supply; Hyperventilation. |
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Thesagro: |
Fisiologia; Ovino; Placenta; Reprodução. |
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Thesaurus Nal: |
Carbon dioxide; Fever; Pregnancy; Reproduction; Sheep; Uterus. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 01972naa a2200337 a 4500
001 1519913
005 2025-07-24
008 1976 bl uuuu u00u1 u #d
024 7 $a10.1152/jappl.1976.41.2.197.$2DOI
100 1 $aOAKES, G. K.
245 $aUteroplacental blood flow during hypperthemia with and without respiratory alkalosis.$h[electronic resource]
260 $c1976
500 $aComparative study.
520 $aAbstract: The effect of induced maternal hyperthermia (1.5 degrees C rise over 60 min) on the uterine and umbilical circulations was examined in two groups of chronically instrumented pregnant sheep. Hyperventilation occurred in both groups. In the group in which the resultant respiratory alkalosis was untreated (N = 5), uterine blood flow decreased to 53 +/- 3% (mean +/- SE; P less than 0.01) of control at maximal maternal temperature. Umbilical blood flow also decreased 30 +/- 6% (P less than 0.01) below control levels. In the other group, normocapnia was maintained (N = 4). Uterine blood flow decreased in this group to 75% +/- 2% (P less than 0.01) of control levels, but umbilical blood flow did not significantly change. There was no significant change in maternal or fetal mean arterial pressure during hyperthermia in either group. Thus, maternal hyperthermia per se results in a significant decrease in uterine blood flow primarily through an effect on uterine vascular resistance, but without a concomitant change in umbilical blood flow.
650 $aCarbon dioxide
650 $aFever
650 $aPregnancy
650 $aReproduction
650 $aSheep
650 $aUterus
650 $aFisiologia
650 $aOvino
650 $aPlacenta
650 $aReprodução
653 $aBlood supply
653 $aHyperventilation
700 1 $aWALKER, A. M.
700 1 $aEHRENKRANZ, R. A.
700 1 $aCEFALO, R. C.
700 1 $aCHEZ, R. A.
773 $tJournal of Applied Physiology$gv. 41, n. 2, p. 197-201, 1976.
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
