The Healthy Newborn - Lecture Notes

This set of flashcards covers key concepts from the lecture on The Healthy Newborn, including physiological adaptations, assessment criteria, and care considerations.

What are the chemical factors that stimulate the respiratory center in newborns at birth?

Chemoreceptors sense decreased PO2 and increased PCO2.

What is the role of surfactant in newborn respiration?

Surfactant reduces surface tension within the alveoli, preventing their collapse.

What is the function of the ductus arteriosus after birth?

It allows blood to flow freely from the right ventricle to the lungs, decreasing pressure in the right side of the heart.

What primarily affects a newborn’s thermoregulation?

Factors such as thin skin, proximity of blood vessels to the surface, flexed position, and surface area.

What are the potential effects of cold stress on a newborn?

Decreased surfactant production, respiratory distress, hypoglycemia, metabolic acidosis, and jaundice.

How does a newborn primarily produce heat in response to cold?

Through nonshivering thermogenesis via the metabolism of brown fat.

What are the indications of jaundice in a newborn?

Visible jaundice when serum bilirubin level is 5-6mg/dL or higher.

What is the normal weight range for a newborn?

2500-4000 grams (5 lb, 8 oz to 8 lb, 13 oz).

What is the purpose of administering Vitamin K to newborns?

To promote the formation of clotting factors and prevent vitamin K deficiency bleeding.

What is the APGAR score used for in newborn assessment?

It's a method to quickly evaluate the physical condition of a newborn shortly after birth.

What are the signs of infection in a newborn?

Subtle changes in activity, tone, color, or feeding.

What is the critical time frame for monitoring bilirubin levels to prevent hyperbilirubinemia?

Jaundice should not be present in the first 24 hours of life.

What key factors can lead to hyperthermia in a newborn?

Increased metabolic rate leading to increased oxygen and glucose needs.