Normal Ranges of laboratory values for pediatrics.
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A PPEND I X B
Pediatric Normal Laboratory Values
Dean B. Andropoulos
Department of Anesthesiology and Pediatrics, Baylor College of Medicine, and Texas Children’s Hospital, Houston, TX, USA
For conversion of conventional (US) units to SI units, see:
www.soc-bdr.org/rds/authors/unit_tables_
conversions_and_genetic_dictionaries/e5196/index_
en.html
Values are reference values from Texas Children’s Hospital
Clinical Laboratory, current as of August 2011. All practitioners are urged to consult the normal laboratory values
for their local laboratory, as these may differ from those
listed below. They are also advised to continually check
for updated normal ranges.
Reference range (United States/conventional units)
Albumin (CSF)
Albumin (S, P)
Age
0–30 days
1–3 months
4–11 months
≥1 yr
Albumin (random urine)
Albumin/creatinine ratio (random urine)
α1-Antitrypsin(S)
Age
0–1 yr
1–4 yrs
4–13 yrs
>14 yrs
α-Fetoprotein (AFP) (S)
Adult
Birth
1 month or less
2–3 months
g/dL
2.9–5.5
2.8–5.0
3.9–5.1
3.7–5.5
<37 mg/L or <3.7 mg/dL
<16 mg/g
mg/dL
92–282
94–156
102–159
97–203
<10 ng/mL
Up to 86,000 ng/mL
May be >10,000 ng/mL
Up to 1000 ng/mL
Bilirubin (S, P)
Age
Up to 23 h
24–48 h
3–5 days
≥1 month
Bc conjugated
Bu unconjugated
Total
B-hydroxybutyrate (S, P)
Blood gases
pH
Capillary/arterial
Age
Newborn
1 day
2–30 days
1 month
2 months–1 yr
≥2 yrs
Premature (mg/dL)
Total
1–8
6–12
10–14
mg/dL
<0.35
<1.0
0.2–1.0
<0.30 mmol/L(12 h fast)
7.33–7.49
7.25–7.43
7.32–7.43
7.34–7.43
7.34–7.46
Full-term (mg/dL)
Total
2–6
6–10
4–8
Appendix B
Test
1303
Reference range (United States/conventional units)
Male
Female
Venous
All ages
pCO2
Capillary/arterial
Age
0–1 month
2 months–1 yr
≥2 yrs
Male
Female
Venous
All ages
pO2
Age
0–1 yr
≥2 yrs
Oxygen saturation
B-type natriuretic peptide (BNP) (EDTA plasma)
7.35–7.45
7.36–7.44
7.32–7.42
mmHg
27–40
26–41
36–46
33–43
40–50
mmHg
mmHg
mmHg
Capillary
60–70
80–90
85–100%
Arterial
65–76
88–105
Venous
25–40
40–47
0–100 pg/mL
BUN – see Urea nitrogen
Complement (CH50), total (S)
23–46 CH50 U/mL
Complement C3,C4 (S)
Age
0–30 days
1 month
2 months
3 months
4 months
5 months
6–8 months
9–11 months
1 yr
2 yrs
3–4 yrs
5–7 yrs
8–9 yrs
≥10 yrs
mg/dL
5.6–8.0
5.0–7.8
4.8–8.1
3.8–6.7
3.5–6.8
3.1–6.3
3.0–6.0
2.5–5.0
2.3–4.8
0.9–1.3 g/24 h
No reference range
Plasma hemoglobin (P)
Plasma hemoglobin (U)
≤4 mg/dL
None detected
Plasminogen activity
56–148%
Platelet count (B)
Platelet function assay (WB)
Collagen/epinephrine
Collagen/ADP
150,000–450,000/ μL
Potassium (S, P)
Age
0–30 days
1–2 months
3–11 months
≥1 yr
Potassium (U) – timed
Potassium (U) – random
Potassium (WB)
Age
Premature
84–183 sec
69–126 sec
mmol/L
4.5–7.0 (venous or arterial)
4.5–7.5 (heel stick)
4.0–6.2
3.7–5.6
3.5–5.5
40–80 mmol/24 h
No reference range
mmol/L
4.5–7.0
Appendix B
Test
0–11 months
≥1 yr
Pre-albumin (S)
Age
0–6 days
7–41 days
≥42 days
Prolactin (S)
Newborn
Nursing female
Follicular female
Luteal female
Pregnancy
1st trimester
2nd trimester
3rd trimester
Protein, total (S, P)
Age
0–30 days
1–3 months
4–11 months
≥1 yr
Protein (CSF)
Age
Premature
0–30 days
≥1 month
Protein C (P)
Normal ranges for healthy full-term infants:
Day 1
Day 5
Day 30
Day 90
Day 180
(Am J Pediatr Hematol Oncol 1990;12:95–104)
Please note that these ranges were not established using
the current reagent and analyzer at TCH Coagulation Lab
Protein S (P)
Normal ranges for healthy full-term infants
Day 1
1311
Reference range (United States/conventional units)
5.0–5.7
3.5–5.5
Day 5
Day 30
Day 90
Day 180
(Am J Pediatr Hematol Oncol 1990;12:95–104)
Please note that these ranges were not established using
the current reagent and analyzer at TCH Coagulation Lab
Protein, total (U) – timed
Protein, total (U) – random
50%
63%
86%
87%
(22–78%)
(33–93%)
(54–118%)
(55–119%)
28–141 mg/24 h
No reference range
Prothrombin time (PT) (P)
Adult
Neonatal reference range from cord blood
12.2–15.5 sec
12.9–16.9 sec
(Continued)
1312
Appendix B
Test
Reference range (United States/conventional units)
Partial thromboplastin time (PTT) (P)
Adult
Neonatal reference range from cord blood
26.5–35.5 sec
28.7–53.7 sec
Red blood cell count (RBC) (B)
Age
0–30 days
1 month
2–6 months
7 months–2 yrs
3–6 yrs
7–12 yrs
13–18 yrs /female
13–18 yrs /male
≥19 yrs/female
≥19 yrs/male
Red cell distribution width – coefficient of variation (RDWCV)
Age
%
0–30 days
13.0–18.0
1 month
13.0–18.0
2–6 months
13.0–18.0
7 months–2 yrs
11.5–16.0
3–6 yrs
11.5–15.0
7–12 yrs
11.5–14.0
13–18 yrs
11.5–14.0
>19 yrs
11.5–14.0
Red cell distribution width – standard deviation (RDWSD)
Age
fL
0–30 days
38.5–49.0
1 month
38.5–49.0
2–6 months
38.5–49.0
7 months–2 yrs
38.5–49.0
3–6 yrs
38.5–49.0
7–12 yrs
38.5–49.0
13–18 yrs
38.5–49.0
>19 yrs
38.5–49.0
Reticulocyte count % (B)
Age
0–2 days
3–4 days
>4 days
Reticulocyte count absolute (B)
Age
0–2 days
3–4 days
>4 days
×106/μL
0.140–0.220
0.040–0.110
0.020–0.080
Reticulocyte hemoglobin content (B)
Age
<2 years
≥2 yrs
pg
24.5–35.2
27.1–35.4
Sedimentation rate (B)
0–20 mm/h
%
3.0–7.0
1.0–3.0
0.5–1.5
Appendix B
Test
Reference range (United States/conventional units)
Sirolimus/rapamycin (P)
3–12 ng/mL
Sodium (S, P) (WB)
Age
Premature
0–11 months
≥1 yr
Sodium (U) – timed
Age
0–11 months
1–15 yrs
≥16 yrs
Sodium (U) – random
1313
mmol/L
132–140
133–142
136–145
mmol/24 h
0.3–3.5
40–180
80–200
No normals
Free thyroxine (T4) (S)
T4 (S)
Age
Cord blood
0–7 days
8 days–4 yrs
5 yrs–9 yrs
≥10 yrs
Free thyroxine index (T7) (S)
Age
0–7 days
8 days–4 yrs
5–9 yrs
≥10 yrs
1.0–2.5 ng/dL
9.1–26.6
5.5–16.6
5.1–14.7
4.0–13.3
Thromboelastogram (TEG ) with kaolin
Reaction time
Angle
Max amplitude
Fibrinolysis
Clot strength
Thrombin time
4.4–11.0 min
49.1–74.7°
53.6–70.3 mm
0.0–7.5%
5.2–11.3
15.0–19.0 sec
Thyroid stimulating hormone (TSH) (S)
Age
Cord blood
0–7 days
8 −14 days
≥15 days
μIU/mL
3–22
<40.00
<25.00
0.32–5.00
Tri-iodothyronine (T3) uptake (S)
Age
Cord blood
0–7 days
8 days–9 yrs
10–14 yrs
≥15 yrs
25–35%
ng/dL
30–70
65–275
90–260
80–210
115–195
Transferrin (S)
Transferrin saturation (S)
Age
0–11 yrs