Reference Ranges/Critical Values

Reference range for sodium?

135-146 mmol/L

Reference range for potassium?

3.5-5.3 mmol/L

Reference range for chloride?

98-110 mmol/L

Reference range for BUN?

7-25 mg/dL

Reference range for creatinine?

0.6-1.2 mg/dL

Reference range for bicarbonate (total CO2)?

21-28 mmol/L

Reference range for calcium?

8.5-10.4 mg/dL

Reference range for phosphorus?

2.5-4.5 mg/dL

Reference range for magnesium?

1.5-2.5 mEq/L

Reference range for C Reactive Protein (CRP)?

0.08-3.1 mg/L

Reference range for serum uric acid?

1.7-7.5 mg/dL

Reference range for total protein?

6.0-8.3 g/dL

Reference range for albumin?

3.7-5.1 g/dL

Reference range for globulin?

2.0-4.0 g/dL

Reference range for A/G ratio?

1.0-2.5 ratio

Reference range for glucose?

65-99 mg/dL

Reference range for LDH?

100-250 U/L

Reference range for AST (SGOT)?

3-35 U/L

Reference range for bilirubin (total)?

0.2-1.3 mg/dL

Reference range for ALT (SPGT)?

2-40 U/L

Reference range for ALP?

30-165 U/L

Reference range for GGT?

2-60 U/L

Reference range for iron?

35-175 µg/dL

Reference range for triglycerides?

<160 mg/dL

Reference range for LDL (cholesterol)?

0-129 mg/dL

Reference range for HDL (cholesterol)?

>40 mg/dL

Reference range for TSH?

0.4-4.2 mIU/L

Reference range for thyroxine (FT4)?

0.9-2.3 ng/dL

Reference range for WBC count?

4.5-11.0 × 10^9/L

Reference range for RBC count?

3.9-5.5 × 10^12/L

Reference range for platelets?

150-450 × 10^9/L

Reference range for neutrophils (relative)?

50-70%

Reference range for lymphocytes (relative)?

20-40%

Reference range for monocytes (relative)?

4-10%

Reference range for eosinophils (relative)?

1-6%

Reference range for basophils (relative)?

<1-2%

Reference range for hemoglobin (Hb or Hgb)?

14-17.5 g/dL

Reference range for hematocrit (Hct) for men?

38.8-50%

Reference range for hematocrit (Hct) for women?

34.9-44.5%

Reference range for MCV?

80-100 fL

Reference range for MCHC?

33-36 g/dL

Reference range for RDW?

<14.5%

Reference range for ESR (sed rate) for men?

0-20 mm/hr

Reference range for ESR (sed rate) for women?

0-29 mm/hr

Reference range for PT?

10-13 seconds

Reference range for INR (healthy individuals)?

1.0-1.1 ratio

Reference range for INR (patients on warfarin)?

2-3 ratio

Reference range for aPTT?

25-40 seconds

Reference range for fibrinogen?

150-350 mg/dL

Reference range for D-dimer?

<3.0 nmol/L

Reference range for Factor VIII?

50-200%

Critical low for sodium?

≤120 mmol/L

Critical low for potassium?

≤2.5 mmol/L

Critical low for chloride?

≤80 mmol/L

Critical low for bicarbonate (total CO2)?

≤10 mmol/L

Critical low for calcium?

≤6.0 mg/dL

Critical low for phosphorus?

≤1.0 mg/dL

Critical low for magnesium?

≤1.0 mEq/L

Critical low for total protein?

≤3 g/dL

Critical low for albumin?

≤1.7 g/dL

Critical low for glucose?

≤40 mg/dL

Critical low for WBC count?

≤2.0 × 10^9/L

Critical low for platelets?

≤40 × 10^9/L

Critical low for hemoglobin?

≤7 g/dL

Critical low for hematocrit (men)?

≤20%

Critical low for hematocrit (women)?

≤20%

Critical low for fibrinogen?

≤60 mg/dL

Critical low for Factor VIII?

≤5%

Critical high for sodium?

≥160 mmol/L

Critical high for potassium?

≥6 mmol/L

Critical high for chloride?

≥120 mmol/L

Critical high for BUN?

≥80 mg/dL

Critical high for creatinine?

≥5.0 mg/dL

Critical high for bicarbonate (total CO2)?

≥40 mmol/L

Critical high for calcium?

≥13.0 mg/dL

Critical high for phosphorus?

≥9 mg/dL

Critical high for magnesium?

≥4.7 mEq/L

Critical high for serum uric acid?

≥13 mg/dL

Critical high for total protein?

≥9.5 g/dL

Critical high for albumin?

≥6.8 g/dL

Critical high for glucose?

≥450 mg/dL

Critical high for bilirubin (total)?

≥15 mg/dL

Critical high for iron?

≥500 µg/dL

Critical high for WBC count?

≥30 × 10^9/L

Critical high for platelets?

≥1000 × 10^9/L

Critical high for hemoglobin?

≥24.0 g/dL

Critical high for hematocrit (men)?

≥60%

Critical high for hematocrit (women)?

≥60%

Critical high for PT?

≥30 seconds

Critical high for INR (healthy individuals)?

≥5 ratio

Critical high for INR (patients on warfarin)?

≥5 ratio

Critical high for aPTT?

≥80 seconds

Critical high for fibrinogen?

≥800 mg/dL