Which patient group is most susceptible to bleeding because of a deficiency of vitamin K–dependent
a. Those with poor diets
b. Those on antibiotic agents
c. Pregnant women
d. Newborns
ANS: D
Newborns are the most susceptible to vitamin K protein deficiency because the levels of the vitamin K–dependent proteins at birth are significantly lower than those for adults, and they drop even further the first few days of life. Breastfeeding prolongs the deficiency because passively acquired maternal antibodies delay establishment of the gut flora.
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Indicate whether the statement is true or false