Review reveals strategies for setting net ultrafiltration during renal replacement therapy, suggesting hemodynamic monitoring and fluid input restriction optimize safety.
Key Points
To review the hemodynamic determinants, phase-dependent targets, and fluid input considerations for safely managing net ultrafiltration in patients receiving renal replacement therapy.
Narrative review evaluating cardiac and vasomotor mechanisms contributing to renal replacement therapy-associated hemodynamic instability.
Assessment of dynamic monitoring approaches—including cardiac output, preload-dependence, and peripheral perfusion—across resuscitation, optimization, stabilization, and evacuation phases.
Hemodynamic instability during fluid removal stems from complex cardiac and vasomotor factors, indicating that observational U-shaped mortality curves cannot serve as fixed bedside prescription targets.
Fluid overload is driven predominantly by nonresuscitation fluid intake, making reduction of fluid administration essential to controlling ultrafiltration intensity.
Cardiovascular monitoring using preload-dependence and perfusion indices helps anticipate instability, though comparative trial evidence proving improved outcomes is currently absent.