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Maternal and Fetal Responses to Halothane in Pregnant Monkeys
Author(s) -
Eng M.,
Bonica J. J.,
Akamatsu T. J.,
Berges P. U.,
Yuen D.,
Ueland K.
Publication year - 1975
Publication title -
acta anaesthesiologica scandinavica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.738
H-Index - 107
eISSN - 1399-6576
pISSN - 0001-5172
DOI - 10.1111/j.1399-6576.1975.tb05235.x
Subject(s) - medicine , blood pressure , heart rate , asphyxia , gynecology , anesthesia , halothane , fetus , hemodynamics , pregnancy , biology , genetics
Maternal cardiac output, blood pressure, heart rate, fetal blood pressure, heart rate and respiratory blood gases, and uterine blood flow were measured in six pregnant monkeys during halothane–nitrous oxide and oxygen anesthesia and compared to these same parameters observed during nitrous oxide and oxygen anesthesia. Halothane 1.5% was associated with a decrease in maternal arterial pressure (54%), heart rate (10%), cardiac output (17%), total peripheral resistance (40%), and uterine blood flow (28%). Mean fetal heart rate decreased 18% and mean fetal blood pressure 22%. These changes in fetal hemodynamics were probably related to a direct depression of the fetal cardiovascular system and its usual compensatory mechanism as well as the fetal asphyxia secondary to the decrease in uterine blood flow. ZUSAMMENFASSUNG Mütterliches Herz‐Minuten‐Volumen, Blutdruck, Pulsfrequenz, fetaler Blutdruck, Herzfrequenz und respiratorische Blutgase und uterine Durchblutung wurden bei 6 schwangeren Affen unter Halothan‐Lachgas und Sauerstoffnarkose gemessen und mit Lachgas‐Sauerstoff anaesthesierten Tieren vergleichen. Halothan 1,5%ig war begleitet von einer Abnahme des mütterlichen arteriellen Druckes (54%) der Pulsfrequenz (10%) des Herz‐Minuten‐Volumen (17%) des peripheren Gesamtwiderstandes (40%) und der uterinen Durchblutung (28%). Die mittlere fetale Herzfrequenz nahm um 18% ab und der fetale Blutdruck um 22%. Diese Veränderungen der fetalen Haemodynamik entsprechen wahrscheinlich einer direkten Depression des fetalen Herz‐Kreislaufsystems und seines normalen Kompensationsmechanismus sowie der fetalen Asphyxie bedingt durch die Reduktion der uterinen Durch blutung.

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