Christopher,a 2-Month-Old Infant,has a Bluish Tinge to His Skin

question 44

Multiple Choice

Christopher,a 2-month-old infant,has a bluish tinge to his skin.Upon listening to the infant's chest,the physician became concerned about a leakage of blood between the right and left atria.What might have caused this problem and what is the treatment?

• A) The ductus venosus may not have closed at birth, and immediate surgical repair may be needed.
• B) The ductus arteriosus may not have closed at birth, and immediate surgical repair may be needed.
• C) The foramen ovale may not be closed, causing backflow of blood into the lungs. The physician will reexamine the infant frequently because the foramen ovale may take as long as 9 months to heal.
• D) The foramen ovale may be closed, causing backflow of blood into the lungs. The physician will reexamine the infant frequently because the foramen ovale may take as long as 9 months to open.

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Definitions:

Compact Bone

Dense bone tissue that forms the outer layer of bone, providing strength and structure.

Canaliculi

Small, channel-like structures in bones that allow for the transport of nutrients and waste between blood vessels and cells.

Lamellae

Thin layers or plates found in bones, contributing to the structure of the compact and spongy bone tissue.

Lacunae

Small spaces in bone or cartilage tissue that house cells, specifically osteocytes in bone and chondrocytes in cartilage.