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Short and long-term outcome of patients with severe acute kidney injury requiring renal replacement therapy.
BACKGROUND: Severe acute kidney injury (AKI) occurs in 2-7% of all hospital admissions and is an independent poor prognostic marker. Nevertheless, information on the long-term outcome of AKI and the factors influencing this is limited.
AIM: To describe the short- and long-term outcome of patients requiring renal replacement therapy (RRT) for severe AKI and to examine factors affecting patient survival and renal recovery.
DESIGN AND METHODS: Single centre retrospective analysis of 481 consecutive patients over a period of 39 months.
FOLLOW-UP: 12 months.
PRIMARY AND SECONDARY OUTCOMES: overall mortality and RRT dependency at 30 days, 90 days and 1 year.
RESULTS: Survival at 30 days, 90 days and 1 year was 54.4, 47.2 and 37.6%, respectively. RRT independency at 30 days, 90 days and 1 year was 35.2, 27.2 and 25.8%, respectively. Of those RRT independent at 90 days, 55% had ongoing chronic kidney disease. There were two distinct groups of patients: Group A (haemofiltration in ITU) and Group B (intermittent haemodialysis in the renal unit). Patient survival was worse in Group A while RRT independence was higher. Independent predictors of survival included renal cause of AKI and lower CI score in Group A and renal or post-renal cause of AKI, younger age and the absence of malignancy in Group B. Independent predictors of renal recovery included the presence of sepsis in Group A and pre- or post-renal cause of AKI in Group B.
CONCLUSIONS: The short- and long-term survival outcome of severe AKI requiring RRT remains poor. Among those who survive, a significant number either continue to require RRT or have residual renal impairment necessitating ongoing follow-up.
AIM: To describe the short- and long-term outcome of patients requiring renal replacement therapy (RRT) for severe AKI and to examine factors affecting patient survival and renal recovery.
DESIGN AND METHODS: Single centre retrospective analysis of 481 consecutive patients over a period of 39 months.
FOLLOW-UP: 12 months.
PRIMARY AND SECONDARY OUTCOMES: overall mortality and RRT dependency at 30 days, 90 days and 1 year.
RESULTS: Survival at 30 days, 90 days and 1 year was 54.4, 47.2 and 37.6%, respectively. RRT independency at 30 days, 90 days and 1 year was 35.2, 27.2 and 25.8%, respectively. Of those RRT independent at 90 days, 55% had ongoing chronic kidney disease. There were two distinct groups of patients: Group A (haemofiltration in ITU) and Group B (intermittent haemodialysis in the renal unit). Patient survival was worse in Group A while RRT independence was higher. Independent predictors of survival included renal cause of AKI and lower CI score in Group A and renal or post-renal cause of AKI, younger age and the absence of malignancy in Group B. Independent predictors of renal recovery included the presence of sepsis in Group A and pre- or post-renal cause of AKI in Group B.
CONCLUSIONS: The short- and long-term survival outcome of severe AKI requiring RRT remains poor. Among those who survive, a significant number either continue to require RRT or have residual renal impairment necessitating ongoing follow-up.
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