INDS 211 Lecture Notes - Lecture 32: Ductus Arteriosus, Vascular Resistance, Umbilical Artery

• School: McGill University
• Department: Interndisciplinary Studies
• Course: INDS 211
• Professor: Bill Buckett

Document Summary

Fetal physiology: three active shunts: ductus venosus, foramen ovale, ductus arteriosus, alveoli filled with fluid, pulmonary arterioles constricted, pulmonary blood flow diminished, blood flow diverted across ductus arteriosus. Postnatal transition: babies take their first breath, oxygen levels rise, leading to, dilatation of pulmonary vessels, constriction of ductus arteriosus. Increased pulmonary blood flow: clamping of the umbilical cord leads to: Removal of the low-resistance system (i. e. placenta: constriction of umbilical arteries and vein. Increased systemic vascular resistance: normal transition: 3 major changes, fluid in alveoli absorbed. Increased pulmonary blood flow: abnormal or delayed transition, about 10% of newborns will require some assistance to begin regular breathing, about 1% of newborns will require extensive resuscitation to survive. Principles of neonatal resuscitation: neonatal resuscitation program algorithm. If yes stay with mother: routine care: provide warmth, clear airway if necessary, dry, ongoing evaluation. If yes respiratory distress : clear airway, spo2 monitoring, consider cpap. If yes: consider intubation, chest compressions, coordinate with.