The sample will be nursing home residents at risk for or with pressure ulcers. After consent, baseline measures of collagen deposition, pressure ulcer oxygen, fluid intake, and body water in the various fluid compartments are measured. Expanded polytetrafluoroethylene (ePTFE) tubes are used to measure collagen deposition. Bioelectrical impedance is used to measure body water. In the treatment phase, subjects are randomized to one of the two supplemental fluid regimes. Supplemental fluid is administered for five days and collagen deposition, subcutaneous tissue oxygen, pressure ulcer oxygen, and body water in the various compartments again measured. Subjects are monitored for fluid overload. Data are analyzed with RMANOVA and logistic regression techniques.