Chapter 21 Flashcards
What lines the alveoli of the lungs and reduces surface tension to keep the alveoli open?
Surfactant
When does fetal lung fluid move into the interstitial space?
before, during and after birth
What two systems absorb lung fluid after birth?
Lymphatic and vascular systems
What 4 factors combine to stimulate the respiratory center in the brain and initiate respirations at birth?
Chemical, Mechanical, Thermal, and Sensory
What are the 4 cardiovascular adaptions that occur after birth in the transition from fetal to neonatal circulation?
- Increases in blood O2 levels
- Shifts in pressure in the heart and lung
- Closing of the umbilical vessels
- closing of the ductus arteriosus, foramen ovale, and the ductus venosis,
What 3 newborn characteristics lead to heat loss?
- Skin with little subcutaneous fat
- Blood vessels close to the surface
- Large skin surface
What are the 4 methods of heat loss in a newborn?
Evaporation, conduction, convection, radiation
What is the difference between conduction and convection?
conduction is the transfer of temperature by direct contact
convection is the transfer of temperature by circulating air
What 5 methods in the neonate produce heat?
Increased activity, flexion, metabolism vasoconstriction, nonshivering therogenesis (brown fat)
What negative effects can the methods of heat production in a neonate cause?
increase oxygen and glucose consumption, respiratory distress, hypoglycemia, and jaundice
What 6 effects can “Cold Stress” place on the body of the neonate?
Increased oxygen need, decreased surfactant production, respiratiory destress, hypoglycemia, Metabolic acidosis, Jaundice
What is a major difference in neonate erythrocytes vs. the erythrocytes of an older child?
Shorter lifespan
What does the nurse give a new born to help increase its clotting factors?
Vitamin K
What are the blood glucose levels of a newborn on day one?
40-60
What are the blood glucose levels of a newborn after day one?
50-100
What are the characteristics of the stools from a breast feed infant?
Frequent, seedy and mustard- colored
What percentage of a newborn is composed of water?
75%
What is the only Ig to cross the placenta?
IgG