Factors that May Affect Fetal Oxygenation - Differential Diagnosis Algorithm Excessive Uterine Activity: • Hyperstimulation • Placental abruption Uteroplacental Dysfunction: • Placental abruption • Placental infarction • Chorioamnionitis • Post-dates pregnancy Cord Compression: • Oligohydramnios • Cord prolapse • Cord entanglement Decreased Fetal O2 Carrying Capacity: • Fetal anemia • Carboxyhemoglobin • Intrauterine growth restriction • Prematurity • Fetal sepsis Decreased Maternal Arterial O2 Tension: • Smoking • Hypoventilation • Respiratory disease • Seizure • Trauma Decreased Maternal O2 Carrying Capacity: • Maternal anemia • Carboxyhemoglobin Decreased Uterine Blood Flow: • Hypotension • Anesthesia • Maternal positioning Maternal Medical Conditions: • Fever • Vasculopathy (SLE, Type 1 diabetes mellitus, HTN) • Hyperthyroidism • Antiphospholipid syndrome #Fetal #Oxygenation #Hypoxia #Differential #Diagnosis #Algorithm #Causes #Obstetrics #OBGyn
