Which finding would indicate concealed hemorrhage in abruptio placentae?

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Concealed hemorrhage occurs when the edges of the placenta do not separate. The formation of a hematoma behind the placenta and subsequent infiltration of the blood into the uterine muscle results in a very firm, boardlike abdomen. The patient will have shock symptoms that include tachycardia. The fundal height will increase as bleeding occurs. Abdominal pain may increase significantly.

Which Finding Would Indicate Concealed Hemorrhage in Abruptio Placentae