A client presents agitated and diaphoretic with a thready pulse, dry skin, and mucous membranes. The client has poor skin turgor and dark yellow urine with decreased output. Laboratory results show BUN 30 mg/dL, HCT 60 percent, Sodium 154 mEq/L, and Potassium 5.1 mEq/L. Vital signs are Pulse 112, Blood Pressure 148/92, Temperature 102.2 degrees Fahrenheit, and Respirations 16. What does the nurse anticipate the health care provider will prescribe?