NDT Advance Access originally published online on March 15, 2005
Nephrology Dialysis Transplantation 2005 20(6):1127-1133; doi:10.1093/ndt/gfh762
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Clinical features and outcome of chronic dialysis patients admitted to an intensive care unit
1 Service de Réanimation Médicale Polyvalente and 2 Service de Néphrologie, Hôpital Gabriel Montpied and 3 Service d'Epidémiologie et Santé Publique, Hôtel-Dieu, Centre Hospitalier Universitaire de Clermont-Ferrand, France
Correspondence and offprint requests to: Bertrand Souweine, Service de Réanimation Médicale Polyvalente, Centre Hospitalier Universitaire Gabriel Montpied, BP 69, 63003 Clermont-Ferrand Cedex 1, France. Email: bsouweine{at}chu-clermontferrand.fr
Background. Information about chronic dialysis (CD) patients admitted to intensive care units (ICU) is scant. This study sought to determine the epidemiology and outcome of CD patients in an ICU setting and to test the performance of the Simplified Acute Physiology Score (SAPS II) to predict hospital mortality in this population.
Methods. All consecutive CD patients admitted to an adult, 10 bed medical/surgical ICU at a university hospital between January 1996 and December 1999 were included in this prospective observational study. Demographics, characteristics of the underlying renal disease, admission diagnosis, the number of organ system failures (OSFs) excluding renal failure and SAPS II, both calculated 24 h after admission, the duration of mechanical ventilation, ICU survival and survival status at hospital discharge and 6 months after discharge were recorded.
Results. A total of 92 CD patients, 16 on peritoneal dialysis and 76 on haemodialysis, were included. The main reason for ICU admission was sepsis and the mean ICU length of stay 6.2±9.9 days. ICU mortality was 26/92 (28.3%) and was associated in multivariate analysis with SAPS II (P<0.001), duration of mechanical ventilation (P<0.01) and abnormal values of serum phosphorus (high or low; P<0.05). Hospital mortality was 35/92 (38.0%) and was accurately predicted by SAPS II [receiver operating characteristics curve: 0.86±0.04; goodness-of-fit test: C = 6.86, 5 degrees of freedom (df), P = 0.23 and H = 4.78, 5 df, P = 0.44]. The 6 month survival rate was 48/92 (52.2%).
Conclusions. CD patients admitted to the ICU are a subgroup of patients with high mortality and SAPS II can be used to assess their probability of hospital mortality. The severity of the acute illness responsible for ICU admission and an abnormal value of serum phosphorus are determinants for ICU mortality.
Keywords: chronic dialysis; intensive care unit; outcome
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