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High versus standard-volume haemofiltration in hyperdynamic porcine peritonitis: effects beyond haemodynamics?

Abstract：

OBJECTIVE:The role of haemofiltration as an adjunctive treatment of sepsis remains a contentious issue. To address the role of dose and to explore the biological effects of haemofiltration we compared the effects of standard and high-volume haemofiltration (HVHF) in a peritonitis-induced model of porcine septic shock. DESIGN AND SETTING:Randomized, controlled experimental study. SUBJECTS:Twenty-one anesthetized and mechanically ventilated pigs. INTERVENTIONS:After 12 h of hyperdynamic peritonitis, animals were randomized to receive either supportive treatment (Control, n = 7) or standard haemofiltration (HF 35 ml/kg per h, n = 7) or HVHF (100 ml/kg per hour, n = 7). MEASUREMENTS AND RESULTS:Systemic and hepatosplanchnic haemodynamics, oxygen exchange, energy metabolism (lactate/pyruvate, ketone body ratios), ileal and renal cortex microcirculation and systemic inflammation (TNF-alpha, IL-6), nitrosative/oxidative stress (TBARS, nitrates, GSH/GSSG) and endothelial/coagulation dysfunction (von Willebrand factor, asymmetric dimethylarginine, platelet count) were assessed before, 12, 18, and 22 h of peritonitis. Although fewer haemofiltration-treated animals required noradrenaline support (86, 43 and 29% animals in the control, HF and HVHF groups, respectively), neither of haemofiltration doses reversed hyperdynamic circulation, lung dysfunction and ameliorated alterations in gut and kidney microvascular perfusion. Both HF and HVHF failed to attenuate sepsis-induced alterations in surrogate markers of cellular energetics, nitrosative/oxidative stress, endothelial injury or systemic inflammation. CONCLUSIONS:In this porcine model of septic shock early HVHF proved superior in preventing the development of septic hypotension. However, neither of haemofiltration doses was capable of reversing the progressive disturbances in microvascular, metabolic, endothelial and lung function, at least within the timeframe of the study and severity of the model.

journal_name

Intensive Care Med

journal_title

Intensive care medicine

authors

Sykora R,Chvojka J,Krouzecky A,Radej J,Karvunidis T,Varnerova V,Novak I,Matejovic M

doi

10.1007/s00134-008-1318-y

subject

Has Abstract

pub_date

2009-02-01 00:00:00

pages

371-80

issue

2

eissn

0342-4642

issn

1432-1238

journal_volume

35

pub_type

杂志文章

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