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  • Title: Nonrecovery of kidney function and death after acute on chronic renal failure.
    Author: Hsu CY, Chertow GM, McCulloch CE, Fan D, Ordoñez JD, Go AS.
    Journal: Clin J Am Soc Nephrol; 2009 May; 4(5):891-8. PubMed ID: 19406959.
    Abstract:
    BACKGROUND AND OBJECTIVES: Relatively little is known about clinical outcomes, especially long-term outcomes, among patients who have chronic kidney disease (CKD) and experience superimposed acute renal failure (ARF; acute on chronic renal failure). DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS: We tracked 39,805 members of an integrated health care delivery system in northern California who were hospitalized during 1996 through 2003 and had prehospitalization estimated GFR (eGFR) <45 ml/min per 1.73 m(2). Superimposed ARF was defined as having both a peak inpatient serum creatinine greater than the last outpatient serum creatinine by > or =50% and receipt of acute dialysis. RESULTS: Overall, 26% of CKD patients who suffered superimposed ARF died during the index hospitalization. There was a high risk for developing ESRD within 30 d of hospital discharge that varied with preadmission renal function, being 42% among hospital survivors with baseline eGFR 30-44 ml/min per 1.73 m(2) and 63% among hospital survivors with baseline eGFR 15-29 ml/min per 1.73 m(2). Compared with patients who had CKD and did not experience superimposed ARF, those who did had a 30% higher long-term risk for death or ESRD. CONCLUSIONS: In a large, community-based cohort of patients with CKD, an episode of superimposed dialysis-requiring ARF was associated with very high risk for nonrecovery of renal function. Dialysis-requiring ARF also seemed to be an independent risk factor for long-term risk for death or ESRD.
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