A 55-year-old man on ICU has severe acute pancreatitis. On day 2, he develops a tense abdomen, rising airway pressures on the ventilator (from 28 to 38 cmH2O), falling urine output, and rising lactate. Measured intra-abdominal pressure (IAP) via the urinary catheter is 26 mmHg. MAP is 65 mmHg. What is his abdominal perfusion pressure (APP) and is it adequate?