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Extrauterine Life (Heat loss (Convection (Loss of heat from the warm body…
Extrauterine Life
Heat loss
Convection
Loss of heat from the warm body surface to cooler air currents
Must dry baby thoroughly
Ensure you cover baby with clothing, blankets, and hat
Put infant under radiant warmer
Radiation
When body heat is transferred to cooler surfaces and objects not in direct contact with body
Evaporation
Loss of heat when water is converted to a vapor
Conduction
Loss of heat to a cooler surface by direct skin contact
Cord clamping
Cord cut=no longer relying on mom's supply
Monitor baby to avoid cold stress
Circulation
Blood no longer received through umbilical cord
Closure of foramen ovale
Closure of ductus arteriosis approximately 10-15 hours after birth functionally. Permanently at 4 weeks.
Blood is pumped throughout heart through valves
Less pressure on pulmonary circulation. Greater pressure systemically.
Respiratory
First breath of life=fluids are excreted and absorbed
Surfactant remains for lubrication of alveoli
Gas exchange begins
30-60 breaths per minute
Periodic breathing is normal. Apnea can occur up to 20 seconds.