The nurse administers vitamin K to the newborn for which reason?
a. Most mothers have a diet deficient in vitamin K, which results in the infant's being deficient.
b. Vitamin K prevents the synthesis of pro-thrombin in the liver and must be given by injection.
c. Bacteria that synthesize vitamin K are not present in the newborn's intestinal tract.
d. The supply of vitamin K is inadequate for at least 3 to 4 months, and the newborn must be supplemented.
ANS: C
Bacteria that synthesize vitamin K are not present in the newborn's intestinal tract. Vitamin K is provided because the newborn does not have the intestinal flora to produce this vitamin for the first week. The maternal diet has no bearing on the amount of vitamin K found in the newborn. Vitamin K promotes the formation of clotting factors in the liver and is used for the prevention and treatment of hemorrhagic disease in the newborn. Vitamin K is not produced in the intestinal tract of the newborn until after microorganisms are introduced. By day 8, normal newborns are able to produce their own vitamin K.
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