Acute Kidney Injury : Recognition and stages

AKI is characterized by a sudden decline in kidney function occurring over hours or days, typically during episodes of acute illness. It is diagnosed based on a rise in serum creatinine, as detailed in the following tables. Up to two-thirds of patients with AKI have already developed the condition by the time they are admitted to the hospital, underscoring the importance of prevention and management in primary care settings.

AKI Recognition and Stages

Recognition and Stages of Acute Kidney Injury (AKI)

AKI Stage	Serum Creatinine Criteria	Urine Output Criteria
1	Rise in SCr ≥ 26 micromol/L or SCr ≥ 1.5 - 1.9 x the baseline	<0.5 mL/kg/hr for >6 hrs
2	Rise in SCr > 2 - 2.9 x the baseline	<0.5 mL/kg/hr for >12 hrs
3	Rise in SCr > 3 x the baseline or SCr ≥ 354 micromol/L or initiated on RRT (irrespective of stage at time of initiation)	<0.3 mL/kg/hr for 24 hrs or anuria for 12 hrs

Additional Criteria for Recognizing AKI

Criteria	Description
Rise in Serum Creatinine (within 48 hours)	A rise in serum creatinine of 26 micromol/L or greater.
High Serum Creatinine Level	In the absence of a baseline creatinine value, a high serum...

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