Characteristics or associated findings with late deceleratio

Discussion in 'USMLE STEP 2 CS' started by Shabir., Aug 1, 2008.

  1. Shabir.

    Shabir. Guest

    Characteristics or associated findings with late decelerations include all of the following except -
    a- They are seen in patients with preeclampsia
    b- They may be associated with respiratory alkalosis
    c- They are associated with a decreased uteroplacental blood flow
    d- They usually are accompanied by a decreased Po2
    e- They usually are accompanied by an increased Pco2

    Answer: b. Late decelerations are indications of a decreased uteroplacental blood flow and often reflect hypoxemia or acidosis in the fetus. Preeclampsia is one of the several clinical entities that may have a decreased uteroplacental blood flow. The pathophysiology involves a fetal respiratory acidosis (not alkalosis) and metabolic acidosis, which means there is a decreased Po2 and an increased Pco2.

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