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High-volume haemofiltration in human septic shock.
L Cole1, R Bellomo, D Journois
1Department of Intensive Care, Austin & Repatriation Medical Centre, Melbourne, Australia.
Intensive Care Medicine
|August 11, 2001
Summary
High-volume haemofiltration (HVHF) significantly reduced vasopressor needs in septic shock patients compared to standard continuous veno-venous haemofiltration (CVVH). HVHF also altered complement anaphylatoxin levels more effectively.
Area of Science:
- Critical Care Medicine
- Nephrology
- Immunology
Background:
- Septic shock is a life-threatening condition characterized by circulatory dysfunction and organ failure.
- Cytokines and complement activation play crucial roles in the pathophysiology of septic shock.
- Current treatments aim to support hemodynamics and modulate the inflammatory response.
Purpose of the Study:
- To investigate the hemodynamic effects of high-volume haemofiltration (HVHF) in septic shock.
- To assess the impact of HVHF on serum cytokine and complement concentrations.
- To compare HVHF with standard continuous veno-venous haemofiltration (CVVH).
Main Methods:
- Randomized cross-over clinical trial involving 11 septic shock patients.
- Patients received 8 hours of either HVHF (6 L/h) or CVVH (1 L/h) in a randomized order.
- Hemodynamic variables, vasopressor requirements, and plasma levels of complement anaphylatoxins and cytokines were measured.
Main Results:
- HVHF led to a significantly greater reduction in norepinephrine requirements compared to CVVH (68% vs 7% reduction).
- Both HVHF and CVVH temporarily reduced plasma concentrations of C3a, C5a, and interleukin-10.
- HVHF demonstrated a more pronounced reduction in C3a and C5a levels.
Conclusions:
- High-volume haemofiltration is effective in decreasing vasopressor support in human septic shock.
- HVHF modulates complement anaphylatoxin levels differently than standard CVVH.
- These findings suggest HVHF may offer advantages in managing septic shock hemodynamics and inflammation.