AWHONN Intermediate Fetal Monitoring Exam 2023/2024

AWHONN Intermediate Fetal Monitoring ExamIf fetal arterial pressure begins to fall below normal levels: - correct answer A. BARORECEPTORS CAUSE VASOCONSTRICTION AND INCREASE, THE FHR An increase in arterial blood pressure produces vessel distension and causes arterial baroreceptors to send neuronal messages to the cardio inhibitory center, which in turn causes rapid slowing of the fetal heart rate via the parasympathetic vague nerve. A decrease in arterial pressure results in an increased heart rate. Source: Which of the following is an extrinsic influence on the FHR? - correct answer Fetal-placental circulation Fetal heart rate vaiability is definded as fluctuations in the baseline that are irregular in - correct answer AMPLITUDE and FREQUENCY The most highly oxygenated blood in fetal circulation is carried by: - correct answer Ductus venosus An increase in the fetal heart rate immediately preceding a variable deceleration is caused by: - correct answer Occlusion of the umbilical vein The etiology of variable decelerations is likely related to umbilical venous and arterial occlusion. Initially, with occlusion of the thin-walled umbilical vein, venous return to the fetal right atrium is reduced, producing a reflex tachycardia. This pattern often is observed as a shoulder on the FHR monitor strip immediately before the abrupt variable FHR deceleration Source: When assessing a FHR tracing, the first step is to - correct answer Estabilish the baseline rate