RSPT 2353 Neonatal Pediatric Respiratory Care. STAGES OF FETAL LUNG DEVELOPMENT. Objectives. Discuss anatomy and physiology of fetal circulation Compare and contrast fetal circulation to infant circulation Define specialized structures of fetal circulation
STAGES OF FETAL LUNG DEVELOPMENT
Tests for Adequate Surfactant Production
What happens to all that fluid that has been filling the lungs for 9 months?
Fetal lung fluid is evacuated from the newborns lungs via:
Low pressure circuit
Gas Exchange occurs in the Placenta
Fetal lungs do not participate in gas exchange
Roughly 10% of blood goes to lungs for tissue development
High PVR in utero creates a desireable
R to L shunting
Question: Why is a R to L shunt desirable
in – utero ?
Large gradient between mom’s PaO2 and fetal PaO2
Promotes the transfer of O2
Higher Hgb concentration in fetus
Greater affinity for O2
Higher SaO2 for the same PaO2 than adult Hgb
Left shift of fetal oxyhemoglobin dissociation Curve
Increased pressures in LA results in:
Fetal and Newborn Assessment in the L and D
At the completion of this lecture the student will:
Indications of a High-Risk Delivery:
Antenatal = Around birth time, usually considered prior to L and D
Neonatal Resuscitation Considerations While Assessing the Patient
Clear of Meconium?
Breathing or Crying?
Good Muscle Tone?
Color Pink ?
Resuscitation of New Born
Heart, how is it working?
Pedi assessment is focused on different indications: