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52. A patient with acute kidney injury (AKI) presents with oliguria, elevated creatinine, and electrolyte imbalances. From a clinical perspective, what is the urgency in determining the cause of AKI?
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54. A patient with uncompensated respiratory acidosis (e.g., due to severe COPD exacerbation) has low blood pH and high PCO2?. What is the technical primary pathophysiological cause of the acidosis?
