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PLoS By Category | Recent PLoS Articles
Critical Care and Emergency Medicine - Physiology

Effect of Diuretic Use on 30-Day Postdialysis Mortality in Critically Ill Patients Receiving Acute Dialysis
Published: Wednesday, March 14, 2012
Author: Vin-Cent Wu et al.

by Vin-Cent Wu, Chun-Fu Lai, Chih-Chung Shiao, Yu-Feng Lin, Pei-Chen Wu, Chia-Ter Chao, Fu-Chang Hu, Tao-Min Huang, Yu-Chang Yeh, I-Jung Tsai, Tze-Wah Kao, Yin-Yi Han, Wen-Chung Wu, Chun-Cheng Hou, Guang-Huar Young, Wen-Je Ko, Tun-Jun Tsai, Kwan-Dun Wu


The impact of diuretic usage and dosage on the mortality of critically ill patients with acute kidney injury is still unclear.

Methods and Results

In this prospective, multicenter, observational study, 572 patients with postsurgical acute kidney injury receiving hemodialysis were recruited and followed daily. Thirty-day postdialysis mortality was analyzed using Cox's proportional hazards model with time-dependent covariates. The mean age of the 572 patients was 60.8±16.6 years. Patients with lower serum creatinine (p?=?0.031) and blood lactate (p?=?0.033) at ICU admission, lower predialysis urine output (p?=?0.001) and PaO2/FiO2 (p?=?0.039), as well as diabetes (p?=?0.037) and heart failure (p?=?0.049) were more likely to receive diuretics. A total of 280 (49.0%) patients died within 30 days after acute dialysis initiation. The analysis of 30-day postdialysis mortality by fitting propensity score-adjusted Cox's proportional hazards models with time-dependent covariates showed that higher 3-day accumulated diuretic doses after dialysis initiation (HR?=?1.449, p?=?0.021) could increase the hazard rate of death. Moreover, higher time-varying 3-day accumulative diuretic doses were associated with hypotension (p<0.001) and less intense hemodialysis (p<0.001) during the acute dialysis period.

Background and Significance

Higher time-varying 3-day accumulative diuretic dose predicts mortality in postsurgical critically ill patients requiring acute dialysis. Higher diuretic doses are associated with hypotension and a lower intensity of dialysis. Caution should be employed before loop diuretics are administered to postsurgical patients during the acute dialysis period.