L7: Fetal & Neonatal Asphyxia Flashcards
Def of Fetal Distress (Intrauterine - Fetal Asphyxia)
- State of inadequate oxygenation & inadequate elimination of CO2 that results in metabolic acidosis if persists for long time.
Types of Fetal Distress (Fetal Asphyxia)
Etiology of Acute Fetal Distress (Intrapartum Asphyxia)
- Maternal
- Fetal
- Placental
- Cord
Etiology of Acute Fetal Distress (Intrapartum Asphyxia)
- Maternal Causes
Maternal Causes of Acute Fetal Distress
- Hypoxic Anoxia
Due to
- pulmonary obstruction
- pulmonary TB
- bilateral pneumonia
- prolonged anesthesia
- convulsive fits.
Maternal Causes of Acute Fetal Distress
- Stagnant Hypoxia
Due to:
- HF
- pulmonary edema
- severe shock.
Maternal Causes of Acute Fetal Distress
- Anemic Anoxia
Due to:
- severe anemia (from Hge).
Maternal Causes of Acute Fetal Distress
- Histotoxic Anoxia
As in
- barbiturate poisoning
Causes of Acute Fetal Distress
- Fetal
- Cerebral edema & ischemia from prolonged labor or difficult forceps (due to ICH or depressed skull fractures).
Causes of Acute Fetal Distress
- Placental
- Placental insufficiency
- Placental separation
- Placental compression
Placental Causes of Acute Fetal Distress
- Placental Insufficiency
Due to:
- small placenta
- placental thrombosis
- multiple placental infarcts
- placental aging.
Placental Causes of Acute Fetal Distress
- Placental Separation
As in:
- placenta previa
- accidental Hge.
Placental Causes of Acute Fetal Distress
- Placental Compression
Due to:
- Tetanic uterine contraction
- Prolonged labor after ROM
- Compression by head in placenta previa type lI posterior.
Causes of Acute Fetal Distress
- Cord
- Cord prolapses
- Cord compression
- Hematoma, True knots, or tight coils of cord around fetal neck.
- Avulsion of cord
- Rupture of vasa previa.
Cord Causes of Acute Fetal Distress
- Cord Prolapse
Leading to cord compression & vasospasm of its vessels.
Cord Causes of Acute Fetal Distress
- Cord Compression
- By uterine contraction after drainage of liquor or by forceps blades.
Dx of Acute Fetal Distress
Dx of Acute Fetal Distress
- AF
Meconium-stained liquor in cephalic presentation.
Dx of Acute Fetal Distress
- FHR
Managment of Acute Fetal Distress
- Conservative
- Active
Managment of Acute Fetal Distress
- Conservative