Treatment of Moderate Dehydration with Ketones in Adults

Assessment and Initial Management

The American College of Physicians and the Infectious Diseases Society of America recommend oral rehydration therapy with reduced osmolarity oral rehydration solution (ORS) as the first-line treatment for adults with moderate dehydration and 1+ ketones, reserving intravenous fluids for those who cannot tolerate oral intake or have severe dehydration 1, 2
Evaluate clinical signs including pulse, perfusion, mental status, and skin turgor to determine the severity of dehydration, as suggested by the Clinical Infectious Diseases guidelines 2
The presence of ketones (1+) indicates a state of ketosis that requires both rehydration and carbohydrate intake to resolve, according to the Diabetes Care guidelines 3
Ketonemia may indicate impaired tolerance of oral rehydration, potentially requiring initial intravenous hydration, as recommended by the Clinical Infectious Diseases guidelines 1

Begin with reduced osmolarity oral rehydration solution (ORS) containing 65-70 mEq/L sodium and 75-90 mmol/L glucose, as suggested by the Annals of Oncology and the American Society of Clinical Oncology guidelines 4, 2
Administer 2200-4000 mL/day of fluids, with the rate of administration exceeding ongoing losses, according to the Annals of Oncology guidelines 4
ORS can be combined with other palatable fluids like diluted fruit juices and broths, as recommended by the Annals of Oncology guidelines 4
Monitor for clinical improvement and reassess hydration status after 3-4 hours, as suggested by the Praxis Medical Insights guidelines 2

Escalate to intravenous fluid therapy if severe dehydration with hemodynamic compromise, altered mental status, inability to tolerate oral rehydration, persistent ketonemia despite oral rehydration, or signs of ileus are present, as recommended by the Clinical Infectious Diseases and Diabetes Care guidelines 1, 3, 5
Use isotonic solutions such as 0.9% NaCl or lactated Ringer's for patients requiring IV fluids, as suggested by the Clinical Infectious Diseases and Diabetes Care guidelines 1, 3

Once rehydrated, administer maintenance fluids and replace ongoing losses, as recommended by the Clinical Infectious Diseases and Praxis Medical Insights guidelines 1, 2
Include carbohydrate intake (150-200g per day) to prevent starvation ketosis and reduce ketone levels, according to the Diabetes Care guidelines 6
Monitor for resolution of ketones through urine or blood testing, as suggested by the Diabetes Care guidelines 6

Avoid overhydration in elderly patients, especially those with heart or kidney failure, as recommended by the Annals of Oncology guidelines 4
In diabetic patients with ketones, never omit insulin if they are insulin-dependent, as suggested by the Diabetes Care guidelines 6
For patients with diabetes, monitor blood glucose levels closely during rehydration, according to the Diabetes Care guidelines 3