NCC EFM Exam Practice Questions and Answers Update

Oxygen is transferred from mom to fetus via the placenta through? Correct anwserPassive (Simple) Diffusion Intervillous space perfusion is dependent on? Correct anwser- Adequate Uterine Blood Flow Maternal Fetal Exchange is best promoted by which maternal position? Correct anwserEither Rt or Lt Lateral What is transfer down the concentration gradient from higher to lower called? Correct anwser- Diffusion The most likely physical rationale for recurrent late decels after epidural is? Correct anwser- Maternal Sympathetic Blockade Which FHR pattern would be anticipated when monitoring mono-mono twins? Correct anwser- Variable Decels Fetus can survive in an environment w/ a PO2 equal to adult venous blood d/t? Correct anwser- increased O2 carrying capacity Variable decels are mediated primarily by? Correct anwser- baroreceptors The sympathetic branch of the ANS influences FHR to? Correct anwser- increase the average difference in baseline FHR b/w 30 & 40 weeks is? Correct anwser- 10bpm usually 5-6; 10 is closest Fetal blood is most highly oxygenated in the? Correct anwser- Ductus Venosous An abrupt rise in fetal bp can stimulate? Correct anwser- variable decels During an acute episode of fetal hypoxemia, fetal blood flow is redistributed primarily to the? Correct anwser- brain Over the course of pregnancy, the FHR baseline? Correct anwser- decreases FHR variability is dependent upon? Correct anwser- cerebral oxygen and intact CNS chemoreceptors respond mainly to? Correct anwser- hypoxemia pH: 7.22 pCO2: 50 HCO3: 24 BE: -3 Correct anwser- normal acid-base status (if pH is normal, answer is normal) Fetal respiratory academia is indicated by a pH of 7.04 and a PCO2 of? Correct anwser- >60 pH: 6.98 PCO2: 49 HCO3: 16 BE:-16 Correct anwser- metabolic acidemia pH: 7.04 pCO2: 80 HCO3: 22 BE: -4 Correct anwser- respiratory acidemia Fetal metabolic acidemia is indicated by an umbilical artery cord blood gas pH of 6.94 & BE of? Correct anwser- >-12 Decels that occur with <50% ctx: Correct anwser- intermittent An acceleration of FHR that is elicited during fetal scalp stim indicates a fetal pH of at least? Correct anwser- 7.19 FHR characteristic most predictive of a vigorous baby at birth is? Correct anwservariability EFM tracing w/ absent variability and recurrent late decels would be categorized as? Correct anwser- abnormal (cat 3) likely cause of fetal tachy w/ moderate variability in a term fetus? Correct anwsermaternal fever FHR pattern likely to develop w/severe fetal anemia? Correct anwser- sinusoidal marked variability is mediated by? Correct anwser- adrenergic activity during 1st stage of labor for women w/ no risk factors, efm should be reviewed every? Correct anwser- 30 min. during 1st stage of labor for women w/complications, EFM should be reviewed every? Correct anwser- 15 min. during 2nd stage labor for women requiring oxytocin, EFM should be reviewed every? Correct anwser- 5 min. in any 10 minute sequence of FHR tracing, minimum baseline duration must be at least? Correct anwser- 2 min. if baseline FHR is indeterminate, refer to prior? Correct anwser- 10 min. window Baseline FHR variability is classified as? Correct anwser- absent, minimal, moderate, marked primary goal in treatment of late decels? Correct anwser- maximize uteroplacentel blood flow Rationale for low dose oxytocin protocol? Correct anwser- half-life of oxytocin Initiate treatment for recurrent late decels w/ moderate variability during 1st stage? Correct anwser- maternal repositioning FHR pattern likely to develop w/ severe fetal anemia? Correct anwser- sinusoidal most consistent clinical sign of uterine rupture during tolac? Correct anwser- recurrent decels of bradycardia loss of FHR variability can result from? Correct anwser- medication administration IV stadol may result in? Correct anwser- transient sinusoidal (pseudosinusoidal) When using a doppler to determine FHR, autocorrelation: Correct anwser- compares successive reflective US waveforms at many points