a 4-month-old infant is brought to the emergency department after 2 days of diarrhea. the infant is listless and has sunken eyeballs, a depressed anterior fontanel, and poor tissue turgor. breathing is deep, rapid, and unlabored. stools are liquid and there has been no obvious urine output. which problem would the nurse be concerned about?

Based on the symptoms described, the nurse would be concerned about dehydration. The sunken eyeballs, depressed anterior fontanel, poor tissue turgor, and no obvious urine output are all signs of dehydration. The deep, rapid, and unlabored breathing is likely due to compensation for the dehydration. It is important to address the dehydration promptly in infants, as it can quickly become severe and lead to serious complications.