Which client should the nurse assess first upon admission to the medical-surgical unit?

The client admitted from a nursing home with dehydration and pneumonia should be assessed first due to the acute nature of their condition. Pneumonia, especially in an elderly client, poses significant risks, including respiratory distress and potential for rapid deterioration. Additionally, dehydration can exacerbate the complications of pneumonia and lead to severe outcomes, such as decreased kidney function or increased susceptibility to infection.

Considering these factors, this client's acute health concerns take precedence over individuals with chronic or stable conditions. Assessing and intervening quickly for those experiencing acute illness is a critical nursing priority to ensure timely treatment and prevent further complications. The other clients may have health issues that need attention, but they do not present the immediate risk that the client with dehydration and pneumonia does, particularly in the context of elderly patients who may have compromised health systems.