Abstract
Objective To investigate the prognosis of children with acute kidney injury(AKI)treated with peritoneal dialysis(PD)following cardiopulmonary bypass.Methods A retrospective study of 46 children aged under 14 years old with AKI treated by using PD following cardiopulmonary bypass from Jan.2006 through Dec.2010.All of them were divided into three groups,namely group A(AKI Ⅰ),group B(AKI Ⅱ)and group C(AKI Ⅲ)according to the stratification of RIFLE criteria.The timing of PD was depended on the phase of AKI.The ICU length of stay,total duration of mechanical ventilation,total amount of peritoneal dialysate and the length of PD were compared among three groups.Their APACHE Ⅱ score,sequential organ failure assessment(SOFA)score,serum interleukin-6(IL-6),oxygenate index,serum creatinine,and mean arterial pressure were also compared between before PD and after PD for 48 hours.One-way ANOVA was used for statistical analysis between different phases of AKI.Data got before PD and after PD for 48 hours were analyzed with paired Student' s t-test.Results The APACHE Ⅱ score,SOFA score and serum IL-6 before PD were higher in patients with phase Ⅲ of AKI than those in patients with phases Ⅰ and Ⅱ of AKI(P ＜ 0.01).There were no significant differences in APACHE Ⅱ score and SOFA score between patients with phases Ⅰ of AKI and patients with phase Ⅱ of AKI before PD(P ＞0.05),but serum IL-6 before PD,ICU length of stay,total duration of mechanical ventilation,total amount of peritoneal dialysate and the length of PD in patients with phase Ⅱ of AKI were higher or longer than those in patients with phase Ⅰ of AKI(P ＜ 0.01).After PD for 48 hours,APACHE Ⅱ score,SOFA score,serum IL-6,oxygenate index,serum creatinine and mean arterial pressure improved insignificantly in patients with phase Ⅲ of AKI(P ＞0.05),but those were improved significantly in patients with phases Ⅰand Ⅱ of AKI(P ＜ 0.05),while serum IL-6 in patients with phase Ⅱ of AKI was still higher than that in patients with phase Ⅰ of AKI(P ＜ 0.01).Conclusions Therapeutic effect of PD on children with AKI following CPB is better if PD is started in the phases Ⅰ and Ⅱ of AKI,especially in the phase Ⅰ of AKI.The RIFLE criteria and IL-6 are useful guidance to the assessment of patients' illness. Key words: Peritoneal dialysis; Cardiopulmonary bypass; RIFLE criteria; Acute kidney injury; Cytokine
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