NCC EFM WITH COMPLETE SOLUTION

NCC EFM WITH COMPLETE SOLUTION Causes of uteroplacental perfusion decrease: - CORRECT ANSWER • HTN • Pregnancy • DM • Hypotension • Excessive uterine contractions (hypertonus) • Decreased surface area, edema, degenerative calcifications, infarcts, infection FHR reflects fetal oxygenation from which extrinsic factors: - CORRECT ANSWER • Maternal oxygenation • Uterine blood flow • Placental change • Umbilical blood flow FHR reflects oxygenation from which intrinsic factors: - CORRECT ANSWER • Fetal circulation • Oxygenation of tissues • FHR regulation Fetal shunts: - CORRECT ANSWER • Ductus venosus- liver • PFO- Right to left atria • Ductus arteriosis- pulmonary a. to aorta Oxygen depletion cascade: - CORRECT ANSWER • Aerobic metabolism • Hypoxemia • Tissue hypoxia • Anaerobic metabolism • Lactic acid build up • Metabolic acidosis Sympathetic innervation: - CORRECT ANSWER • Releases Eip/norepi • Increases FHR Parasympathetic/Vagal innervation: - CORRECT ANSWER • Releases ach • Decreases FHR and transmits variability Early decel: - CORRECT ANSWER • Fetal head compression • -vasovagal response Variable decel: - CORRECT ANSWER • Cord compression • -increase BP/HTN • -activation of baroreceptor