The nurse is caring for an infant born at 37 weeks of gestation of a nondiabetic mother just admitted to the neonatal intensive care unit for observation. The nurse notes that which lecithin/sphingomyelin (L/S) ratio obtained before delivery indicates no
a. 1.4:1
b. 1.6:1
c. 1.8:1
d. 2:1
ANS: D
An L/S ratio of 2:1 in nondiabetic mothers indicates virtually no risk of RDS.
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The relaxation phase of the heart cycle is ____________________.
Fill in the blank(s) with the appropriate word(s).