Nathan, a 68-year-old man, who presents to the Emergency Department (ED) with abdominal pain, fatigue and confusion.  Four days ago, he was discharged from the hospital after laparoscopic surgery for a small bowel obstruction caused by adhesions.  His family reports that over the past 24 hours, he has been increasingly confused, and not eating well.  PMH:  Hypertension, Hyperlipidaemia, ischemic heart disease, Type 2 Diabetes.  Vital Signs: BP: 88/50 mmHg, HR: 110 bpm, Temp: 38.0°C,  RR: 28, SpO2: 92%, BGL: 13 mmol/L Laboratory Results:  WBC: 16 x 10⁹/L, CRP: 200 mg/L, Lactate: 3.8 mmol/L,    Which laboratory finding is most concerning for Nathan's risk of progression to tissue hypoperfusion secondary to hypotension? 单项选择题

A

CRP 200 mg/L

B

Blood glucose level 13 mmol/L

C

White blood count 16 x 10⁹/L

D

Lactate 3.8 mmol/L

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