Fetal distress
Fetal distress
DefinitionFetal distress is defined as depletionof oxygen and accumulation ofcarbon dioxide,leading to a state of“hypoxia and acidosis酸中毒“duringintrauterinelife
Definition Fetal distress is defined as depletion of oxygen and accumulation of carbon dioxide,leading to a state of “hypoxia and acidosis酸中毒“during intrauterine life
Etiology>Maternalfactors（1）Microvascular微血管的ischaemia（属郁缺血）（PIH)(2)LowoxygencarriedbyRBC(severeanemia)(3)Acutebleeding(placentaprevia,placentalabruption)(4)Shockandacuteinfection(5)obstructedofUtero-placentalbloodflow
Etiology ➢Maternal factors (1) Microvascular微血管的ischaemia（局部缺血）(PIH) (2) Low oxygen carried by RBC(severe anemia) (3) Acute bleeding(placenta previa, placental abruption) (4) Shock and acute infection (5) obstructed of Utero-placental blood flow
Placenta、umbilical factors:(1)Obstructedofumbilicalbloodflow(2)Dysfunctionofplacenta>Fetal factors:(1)Malformationsof cardiovascularsystem(2)Intrauterineinfection
➢Placenta、umbilical factors: (1) Obstructed of umbilical blood flow (2) Dysfunction of placenta ➢Fetal factors: (1) Malformations of cardiovascular system (2) Intrauterine infection
PothogenesisHypoxia、accumulationof carbon dioxiderespiratoryAcidosisAcuteFHR+FHR-→FHRtfetaldistressIntestinalperistalsisRelaxationoftheanalsphincter肛门括约肌meconium胎粪aspiration误吸fetalorneonatalpneumonia
Pothogenesis Hypoxia、accumulation of carbon dioxide ￬ respiratory Acidosis ￬ FHR￪ FHR ￬ FHR￪ ￬ Intestinal peristalsis ￬ Relaxation of the anal sphincter肛门括约肌 ￬ meconium胎粪aspiration误吸 ￬ fetal or neonatal pneumonia Acute fetal distress