Background.  Dehydration is the most common fluid and electrolyte disturbance in the elderly population and has been identified as one of the most common reasons elderly patients seek emergency care (Mader,2006; Ferry, 2005). Dehydration is linked to shortened life span, increased incidence of skin breakdown, delayed wound healing and pneumonia (Amella, 2006).
Problem: Nurses are in a critical position to recognize early fluid volume deficit so that it does not proceed to dehydration and life threatening hypernatremia (Chassagne, Druesne, Capet,; Ménard, & Bercoff 2006`).  Elderly patients may have fluid volume deficits which can lead to renal failure, changes in LOC, and cardiopulmonary decompensation (Gross, 1991).
Purpose: The purpose of this study was to determine the effect of using a Thermo Mug to rehydrate elderly patients.  The research question: Is there a significant difference in hydration status of elderly patients who use Thermo Mugs to measure fluid intake? Methodology: A descriptive exploratory design was used.  Sample: Thirty nursing home residents participated and gave informed consents. Although a diagnosis of  dehydration was not always identified, nursing/medical notes indicated dehydration was an underlying problem.  Inclusion criteria: 65+ and able to speak English.  Exclusion criteria: Individuals terminal and refusing sustenance. Procedure: Demographic data was collected (ages ranged from 65-101)
Data Analysis. Staff reported that patients’ intake increased and urine concentration decreased since it was easier for the frail elderly to drink H₂O from the mug and not have to pour from a pitcher to a glass.  Conclusion: An innovative nursing intervention, a Thermo Mug prevented dehydrated in frail elderly patients. This study adds to the literature by demonstrating how a unique nursing intervention can sustain care for high-risk frail elderly patients.