Factors that May Affect Fetal Oxygenation - Differential ...
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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



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