<prompt> Definition of Acute kidney injury includeIncrease of serum creatinine by 1mgdl in 24 hoursBUNCreatinine ratio above 20Urine output less than 1000ml in a day50 increase in baseline serum creatinine in a week  <response>: AKI is currently defined by a rise of serum creatinine from baseline by at least 0.3 mgdL within 48 h or at least 50 higher than baseline within 1 week, or a reduction in urine output to less than 0.5 mLkg per hour for longer than 6 h. Ref: Harrison 19e pg: 1800 