In what situation is ultrafiltration considered in HF management?

• A. In diuretic-resistant congestive HF with volume overload.
• B. In all HF patients.
• C. Only when hyponatremia is present.
• D. Never.

Answer: (A)

Ultrafiltration is considered when fluid overload in heart failure cannot be adequately reduced with diuretics, i.e., diuretic-resistant congestion. In this situation, the kidneys no longer respond effectively to loop diuretics because of factors like reduced renal perfusion, neurohormonal activation, and enhanced sodium reabsorption, so edema persists despite therapy. Ultrafiltration mechanically removes plasma water across a membrane, allowing precise and rapid reduction of volume while preserving electrolytes, which can relieve congestion when diuretics fail or are limited. It is not used universally for all heart failure patients or solely for hyponatremia, and it carries its own risks and logistical considerations.