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30 Cards in this Set
- Front
- Back
NTG is used for:
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Uterine relaxation
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Increases uterine blood flow
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NTG
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There is a rapid ______ transfer with NTG
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Placental
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Primarily affects arteriolar side
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Sodium nitroprusside
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Arteriolar and venous dilator
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Sodium nitroprusside
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Has a quick onset and short duration
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Sodium nitroprusside
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Does NOT improve uterine blood flow
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Sodium nitroprusside
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Can cause cyanide toxicity
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Sodium nitroprusside
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Ultra short acting beta blocker
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Esmolol
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Esmolol is a:
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B1 antagonist
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Causes fetal B blockade in sheep
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Esmolol
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Not commonly used in obstetrics
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Esmolol
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Esmolol is eliminated by
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Plasma esterases
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A1 and non selective BB
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Labetalol
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Ratio of alpha to B effects in labetalol
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1:3
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Latetalol maintains:
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Uterine blood flow
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Can be used for tx of PIH and to blunt responses to intubation. A/B blocker
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Labetalol
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Contraindicated in pts with asthma
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Labetalol
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Vaspressors
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Epi, ephedrine, neo
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Uterine artery vasoconstrictor
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Epi
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Reduces uterine blood flow
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Epi
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Temporarily relaxes the uterus
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Epi
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Has direct and indirect action
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Ephedrine
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Has A and B effects; A - indirect, B- direct
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Ephedrine
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Ephedrine is _____ times less potent than epi
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250
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Vasopressor of choice in OB
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Ephedrine
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Ephedrine does not cause:
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Uterine artery constriction
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Ephedrine does not compromise:
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Uteroplacental perfusion
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Ephedrine crosses the placenta and causes:
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Increased FHR and BTBV; increases O2 consumption
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Ephedrine is not good for a:
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Fetus already in distress
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