What is a common sign of dehydration in elderly patients?

A common sign of dehydration in elderly patients is altered mental status or confusion. This occurs because dehydration can lead to electrolyte imbalances and reduced blood flow to the brain, impacting cognitive function. The elderly are particularly susceptible to dehydration due to factors like decreased thirst sensation, medication effects, and possible comorbid conditions that affect fluid balance.

In cases of dehydration, cognitive changes can range from slight confusion to significant changes in alertness or orientation. Recognizing altered mental status is crucial, as it can indicate more severe levels of dehydration that require immediate medical intervention.

While elevated heart rate can occur due to dehydration, it is not as specific to dehydration as altered mental status is, particularly in older adults who may have other underlying cardiovascular issues. Increased appetite and high blood pressure are generally not associated with dehydration and typically do not reflect the physiological responses to fluid loss.