Table 1 Laboratory investigations on admission to Kimitsu Chuo Hospital Intensive Care Unit

WBC

0.4 × 10³/μL

pH

7.51

RBC

2.25 × 10⁶/μL

pCO₂

30 mmHg

Hgb

7.6 g/dL

pO₂

415 mmHg

Hct

22.8%

HCO₃

25.8 mmol/L

Plt

183 × 10³/μL

BE

1.0 mmol/L

Reticulo

27.8%

Lactate

2.2 mmol/L

Met Hgb

9.0%

Coagulation studies

Rapid Urinary Antigen Detection Kit

PT INR

1.19

Streptococcus pneumoniae

negative

aPTT

26.9 s

Legionella

negative

Serum Chemistry

Alb

2.1 g/dL

Na

129 mEq/L

AST

17 IU/L

K

4.4 mEq/L

ALT

22 IU/L

Cl

96 mEq/L

LDH

247 IU/L

BUN

18.7 mg/dL

T-bil

3.0 mg/dL

Cre

0.55 mg/dL