Fluid Administration in Acute Kidney Injury with Reduced Ejection Fraction

Introduction to Fluid Management

The American College of Cardiology recommends cautious administration of fluids at 50 mL/hour in patients with acute kidney injury (AKI) and reduced ejection fraction (EF 43%), avoiding the proposed 250 mL bolus due to significant risk of precipitating pulmonary edema 1

Assess volume status immediately, checking for signs of fluid overload, and evaluate hemodynamic stability to determine if fluid administration is justified, according to the American Heart Association 2, 3
Monitor urine output hourly, targeting >0.5 mL/kg/hour as evidence of adequate renal perfusion, and reassess fluid status every 6-12 hours for signs of fluid overload, as recommended by the National Kidney Foundation 2, 3

Start with 50 mL/hour of isotonic crystalloid (0.9% normal saline or balanced crystalloid solution like lactated Ringer's) if fluid administration is clinically indicated, and target approximately 1-1.5 mL/kg/hour for maintenance, as suggested by the European Society of Cardiology 2, 3
Avoid the 250 mL bolus entirely, as rapid fluid administration can precipitate or exacerbate pulmonary edema in patients with cardiac dysfunction, according to the American College of Cardiology 1

For hemodynamically unstable patients, continuous renal replacement therapy (RRT) is preferred over intermittent hemodialysis, as recommended by the Kidney Disease: Improving Global Outcomes (KDIGO) guideline 4, 5

The American Heart Association, American College of Cardiology, and Heart Failure Society of America emphasize that patients with CHF have severely limited fluid tolerance, and a cautious approach to fluid administration is critical 6

The American Heart Association, American College of Cardiology, and Heart Failure Society of America recommend avoiding any bolus administration of fluids in patients with CHF, as this can precipitate acute pulmonary edema 6
For patients with anaphylactic shock and CHF, the anaphylaxis guidelines recommend cautious observation to prevent volume overload, rather than rapid fluid infusion 7
The perioperative fluid management guidelines demonstrate that buffered crystalloid solutions reduce the risk of hyperchloremic acidosis and major adverse kidney events (MAKE) compared to 0.9% saline 8

The Kidney International guidelines suggest that continuous renal replacement therapy (CRRT) is preferred over intermittent hemodialysis for hemodynamically unstable patients, allowing for more controlled fluid removal and better hemodynamic stability 9
The American Heart Association, American College of Cardiology, and Heart Failure Society of America state that the benefit of fluid restriction to reduce congestive symptoms is uncertain in advanced HF with hyponatremia, and therefore do not recommend restricting fluids for hyponatremia 6