A nurse is collecting data from a newborn who is receiving phototherapy. Which of the following findings is an indication of dehydration?

A: Using a plastic cover on the crib mattress can lead to overheating and discomfort for the baby. It is not recommended.
B: Bumper pads pose a suffocation and entrapment risk for infants. They should not be used in the crib.
C: Placing a newborn on a foam-wedge cushion can increase the risk of suffocation. Infants should be placed on their backs on a firm mattress without any extra padding.
D: Ensuring that the mattress fits snugly against the sides of the crib prevents any gaps where the baby could become trapped. This is an important safety measure.

A. Uterine atony
Uterine atony refers to the lack of muscle tone in the uterus after delivery, leading to excessive bleeding. This is not typically associated with abruptio placentae, which involves the premature separation of the placenta from the uterine wall during pregnancy, typically presenting with different symptoms such as painful contractions and bleeding.

B. Polyhydramnios
Polyhydramnios refers to an excessive amount of amniotic fluid during pregnancy and is not a characteristic of abruptio placentae. Polyhydramnios can be associated with various conditions but is not directly linked to placental abruption.

C. Painless vaginal bleeding
Painless vaginal bleeding is more characteristic of placenta previa, a condition where the placenta is abnormally positioned over the cervix. Abruptio placentae, on the other hand, typically presents with painful vaginal bleeding due to the detachment of the placenta from the uterine wall.

D. Board-like abdomen
A board-like abdomen is a classic sign of abruptio placentae, indicating significant uterine muscle contraction and possible internal hemorrhage. The sudden separation of the placenta can cause blood to accumulate behind the placenta, leading to a rigid, "board-like" feeling of the abdomen, which is a hallmark symptom of this condition.