The hemoglobin and hematocrit were normal, while the WBC count was 22,000 cells/μL, with 8% band cells and platelet count of 94 × 109 cells/L. The concentration of serum HCO3 was 6 mmol/L, sodium was 115 mmol/L, potassium was 5.5 mmol/L, and chloride was 107 mmol/L. The concentration of creatinine was 97 mmol/L, urea was 5 mmol/L, and glucose was 10 mmol/L. Serum lactate dehydrogenase was concentration was 900 U/L. Serum lactic acid concentration was14 mmol/dL. Coagulation studies revealed an international normalized ratio of 2 and an activated partial thromboplastin time of 45 s (normal range, 24 to 34 s). Few schistocytes were noted on the peripheral blood smear. Initial arterial blood gas analysis while the patient was breathing room air showed a Pao2 of 90 mm Hg, a Paco2 of 19 mm Hg, and a pH of 7.1.