What typically happens to the patent ductus arteriosus (PDA) shortly after birth?

What typically happens to the patent ductus arteriosus (PDA) shortly after birth?

• A. It closes naturally
• B. It becomes permanently open
• C. It redirects blood flow
• D. It causes hypertension

Answer: (A)

The patent ductus arteriosus (PDA) is a normal fetal structure that connects the pulmonary artery to the aorta, allowing blood to bypass the non-functioning fetal lungs. Shortly after birth, when the newborn begins to breathe air, several physiological changes occur. The increase in oxygen levels and the decrease in circulating prostaglandins lead to the constriction and eventual closure of the PDA. This closure typically occurs within the first few days of life and helps the circulatory system transition from fetal to neonatal function, where the lungs begin to take over the role of oxygenation. A natural closure is crucial for proper blood flow and oxygenation, and if the PDA remains open, it can lead to complications.

The patent ductus arteriosus (PDA) is a normal fetal structure that connects the pulmonary artery to the aorta, allowing blood to bypass the non-functioning fetal lungs. Shortly after birth, when the newborn begins to breathe air, several physiological changes occur. The increase in oxygen levels and the decrease in circulating prostaglandins lead to the constriction and eventual closure of the PDA. This closure typically occurs within the first few days of life and helps the circulatory system transition from fetal to neonatal function, where the lungs begin to take over the role of oxygenation. A natural closure is crucial for proper blood flow and oxygenation, and if the PDA remains open, it can lead to complications.