D. Renal complications
(1) Acute renal failure: defined as an abrupt decline in 			 renal function manifested by a rise in serum creatinine greater than 0.5mg/dl 			 per day or a fall in urine output of less than 400 l/day.
(2) Positive fluid balance: Chest X-ray with worsening of 			 infiltrates, or pulmonary edema accompanied by either 1 kg weight gain in 24 h or 			 intake > output by 1000 cm3 in 24 h. Calculate by intake (not 			 blood), minus urine, minus drainage, minus insensible loss (360 cm3). 			 If ventilator has humidification; add 300 to intake. This criterion should not 			 be applied to patients in shock, chronic heart failure, or ARDS.