Nutrition therapy for acute renal failure: a new approach based on 'risk, injury, failure, loss, and end-stage kidney' classification (RIFLE).
OBJECTIVE
Critically ill patients are hypermetabolic and have increased nutrient requirements. Although it is assumed that nutritional support is beneficial in this group of patients there are no well designed clinical trials to test this hypothesis. The rationale for nutritional support, therefore, is based upon clinical judgement. Although it is not known how long a critically ill patient can tolerate what is effectively starvation, the loss of lean tissue which occurs in catabolic patients (20-40 g nitrogen/day) suggests that depletion to a critical level may occur after 14 days.


RESULTS
Acute kidney injury (AKI) is a syndrome commonly seen in the ICU. It is usually multifactorial rather than the result of a primary renal disease. The difficulty of adequately defining the syndrome has been addressed by the acute dialysis quality initiative, leading to the risk, injury, failure, loss, and end-stage kidney (RIFLE) criteria.


CONCLUSIONS
Broad consensus in the diagnosis and management of AKI in critical illness is achievable. Standardization of nutritional support by RIFLE classification is urgently needed.
Valencia
Erick
E
Head Intensive Care Unit, Department of Critical Care Medicine, Holy Heart Clinic, Medellin, Colombia. erick@une.net.co
Marin
Angela
A
Hardy
Gil
G
D058186:Acute Kidney Injury / Q000145:classification / Q000178:diet therapy* / Q000378:metabolism; D001806:Blood Urea Nitrogen; D016638:Critical Illness / Q000628:therapy; D006801:Humans; D007362:Intensive Care Units; D007668:Kidney / Q000378:metabolism; D044623:Nutrition Therapy; D011506:Proteins / Q000378:metabolism
D011506:Proteins