The mortality rates of specific types or Niraparib carboxylic acid metabolite M1 web combina-tions. Forty-four percent of patients who died in the ICU had a serum creatinine of PubMed ID:http://www.ncbi.nlm.nih.gov/pubmed/20727173 < 200 ol/l. Patients with ARF alone had a significantly lower mortality than patients with any other single OF. This superior outcome was abolished when ARF occurred in combination with other failed organ systems. The majority of patients die with ARF rather than from ARF.P184 Need for renal replacement therapy in ICU is a marker of morbidityME Ostermann, RW Chang, for the Riyadh ICU Program Users Group (RIPUG) Department of Nephrology and Transplantation, St George's Hospital, London SW17 0QT, UK Patients in the intensive care unit (ICU) with acute renal failure (ARF) who need renal replacement therapy (RRT) have a high mortality. There is a widely held view that RRT per se is the reason. The aim of our study was to verify this hypothesis. We retrospectively analysed the RIPUG database of 26,689 patients admitted to 21 ICUs in the UK between June 1989 and September 1996. 2394 patients (9 ) had ARF of whom 650 (27.2 ) were treated with RRT. We compared the ICU mortality rates of patients who needed RRT with outcome of patients in ARF without RRT and the impact of the number of associated failed organ systems (Table). ICU mortality of patients with ARF was higher in patients who needed RRT. Four hundred and twenty-seven (66 ) of patients with ARF who needed RRT suffered from at least two additionalTable Patients in ARF with RRT Number of OFS Total ARF alone ARF + 1 other ARF + 2 other ARF + 3 other ARF + 4 other ARF + 5 other OFS = failed organ systems. n 650 60 163 266 121 37 3 ICU mortality ( ) 57.5 10 38.7 64.3 79.3 94.6 100 Patients in ARF without RRT n 1742 552 551 419 150 63 7 ICU mortality ( ) 40.3 9.2 34.7 67.1 80 81 100 P < 0.001 NS NS NS NS NS NSfailed organ systems, compared to 590 (36.7 ) amongst patients with ARF who did not need RRT. There was no significant difference in mortality between patients with or without RRT if the same number of associated organ failures were accounted for. We looked at the temporal relationship between onset of systemic inflammatory response syndrome (SIRS) and start of RRT. Of all 353 patients who suffered from ARF for more than 3 days and required RRT, 335 patients fulfilled the criteria for SIRS either before or at time of initiation of RRT. ICU-mortality in this group was 54.3 compared to 44.4 amongst the 18 patients who developed SIRS after starting RRT (hospital mortality 63.3 versus 44.4 ). This difference was statistically not significant. In patients with ARF the need for RRT should be viewed as a marker of severity of illness and not as a cause of death.P185 Use of Molecular Adsorbent Recycling System (MARS) treatment in severe liver failure: initial clinical experienceR Gaspari*, S Mensi*, L D'Amato*, C Di Campli, A Gasbarrini, R Proietti* *Department of Anaestesiology and Intensive Care Medicine, and Department of Medical Pathology, Catholic University of Rome, Largo F. Vito, 8-00168 Rome, Italy Introduction: Despite significant advances in intensive care management, patients with severe liver failure (SLF) still have a high mortality rate and the orthotopic liver transplantation (OLT) remains the only effective treatment. Stange et al. [1] have introduced a new, cell-free, extracorporeal, liver assistance method for the selective removal of albumin-bound substances using a specific membrane and an albumin-enriched dialysate, namely Molecular Adso.