What is a common sign of dehydration in an elderly patient?

Decreased urine output is a common sign of dehydration in elderly patients due to the body's reduced ability to conserve water and balance fluids effectively as it ages. When a person is dehydrated, the kidneys conserve as much water as possible, leading to a noticeable reduction in urine production. This is particularly significant in older adults, who may not feel thirsty even when their bodies require fluids.

In addition, elderly individuals may have other factors impacting hydration, such as chronic illnesses or medications that can further exacerbate dehydration. Recognizing decreased urine output can prompt timely interventions to replenish fluids and prevent serious complications associated with dehydration, such as kidney damage or confusion.

In contrast, increased appetite, bright clear skin, and enhanced cognitive function do not align with the typical signs and symptoms of dehydration. These options would generally suggest good hydration and overall health, which is contrary to what you would expect in a dehydrated individual.