PT II Clinical Lab Reference Ranges to Know

Sodium (Na)

135-145

Potassium (K)

3.5-5

Chloride (Cl)

96-106

Bicarbonate (HCO₃)

24-30

Blood Urea Nitrogen (BUN)

8-20

Serum Creatinine (SCr)

0.7-1.5

Glucose

70-110

Calcium (Ca)

8.5-10.8

Magnesium (Mg)

1.5-2.2

Phosphorus (Phos)

2.5-4.5

Microorganisms

Present when > 100,000

Normal when < 10,000

RBCs

Reference range: 1-3 HPF

Positive = “Many”

WBC

Reference range: 0-2 HPF

Positive = “Many”

Tubular Epithelial Cells

Reference range: 0-1 HPF

Positive = “Many”

Protein

Reference range: < 200 mg/g

Abnormal = Positive

pH

4.5-8

Specific Gravity

1.010-1.025

Blood and Hemoglobin & Leukocyte Esterase and Nitrites

Reference range: 0 to trace

Positive = 2⁺ or 3⁺

Glucose and ketones

Reference range: none

Abnormal = positive

White Blood Cell (WBC)

4.8-10.8 × 10³

Platelet Count (Plt)

140-440 × 10³

Mean Cell Volume (MCV)

80-99

Reticulocyte Count

0.5-2.5%

Vitamin B12

>200

Hemoglobin (Hb or Hgb)

Males = 14-18

Females = 12-16

Hematocrit (Hct)

Males = 42-52%

Females = 37-47%

Folic Acid

5-25

Polymorphonuclear nutrophils (segs, PMNs, Polys)

45-73%

Bands

3-5%

Procalcitionin

> 0.2

Thyroid Stimulating Hormone (TSH)

0.25-6.7

Uric Acid

2-7

Aspartate aminotransferase (AST)

8-42

Alanine aminotransferase (ALT)

3-30

Albumin

3.5-5

Total bilirubin

0.3-1

Ammonia

30-70