lab ranges and critical values

WBC range

5000-10,000

WBC critical values

< 2500 or > 30,000

ANC

< 500 highest infection risk
500-1000 mod risk
> 1000 low infection risk

platelets range

150,000-400,000

platelets critical value

< 50,000 or > 1 million

RBCs range

4.7-6.1 male, 4.2-5.4 female

RBC critical value

none

Hgb range

14-18 male, 12-16 female

Hgb critical value

< 5 or > 20

Hct range

42-52% male, 37-47% female

Hct critical value

< 15% or > 60%

Na range

136-145

Na critical range

< 120 or > 160

K range

3.5-5

K critical value

< 2.5 or > 6.5

Ca range

9-10.5

Ca critical value

< 6 or > 13

Mg range

1.3-2.1

Mg critical value

< 0.5 or > 3

BUN range

10-20

BUN critical value

> 100

creatinine range

0.6-1.2 male, 0.5-1.1 female

creatinine critical value

> 4

pH range

7.35-7.45

pH critical value

< 7.25 or > 7.55

PaCO2 range

35-45

PaCO2 critical value

< 20 or > 60

HCO3 range

21-28

HCO3 critical value

< 15 or > 40

PaO2 range

80-100

PaO2 critical value

< 40

HbA1c range

normal: < 5.7%
pre-diabetes: 5.7-6.4%
diabetes: > 6.5%
older adults: < 7-7.5%
older adults with multiple comorbidities: < 8-8.5%

glucose range

adult: 74-106
hospitalized: 140-180
stringent in hospital: 110-140

hypoglycemia levels

1: < 70
2: < 54
3: severe hypoglycemic event

glucose critical values

< 50 or > 400

TSH range

0.4-4.5

T4 range

4-12 male, 5-12 female, 5-11 older adult

free T4 range

0.75-1.5

T3 range

70-205
40-180 older adults

hyperthyroidism

decreased TSH, increased T3/T4
Grave’s disease

hypothyroidism

primary: decreased T4 and increased or normal TSH (Hashimoto’s)
secondary: decreased TSH and T4

serum albumin range

3.5-5

serum albumin critical value

< 1.5

serum prealbumin range

15-36

serum albumin critical value

< 10.7

serum bilirubin range

0.3-1 adults, 1-12 infants

serum bilirubin critical value

> 12 adults, > 15 newborns

ammonia range

10-80

transaminases

no range, if high liver getting worse

creatine kinase range

38-174 male, 26-140 female