Reference intervals—biochemistry

Adrenocorticotrophic hormone

P

<80ng/L

Alanine aminotransferase (alt)

P

5–35IU/L

Albumin

P^¶

35–50g/L

Aldosterone

P**

100–500pmoL/L

Alkaline phosphatase

P^¶

30–300IU/L (adults)

α-fetoprotein

S

<10kU/L

α-amylase

P

0–180 Somogyi U/dL

Angiotensin II

P**

5–35pmol/L

Antidiuretic hormone (adh)

P

0.9–4.6pmol/L

Aspartate transaminase

P

5–35IU/L

Bicarbonate

P^¶

24–30mmol/L

Bilirubin

P

3–17µmol/L (0.25–1.5mg/100/mL)

Calcitonin

P

<0.1mcg/L

Calcium (ionized)

P

1.0–1.25mmol/L

Calcium (total)

P^¶

2.12–2.65mmol/L

Chloride

P

95–105mmol/L

*Cholesterol

P

<5mmol/L desired

    Triglycerides

P

0.15–1.9mmol/L

    ldl

P

1.55–4.4mmol/L

    hdl

P

0.9–1.93mmol/L

Cortisol

P

a.m. 450–700nmol/L

midnight 80–280nmol/L

Creatine kinase (ck)

P

♂ 25–195IU/L; ♀ 25–170

Creatinine (related to lean body mass)

P^¶

70–≤150µmol/L

Ferritin

P

12–200mcg/L

Folate

S

2.1mcg/L

Follicle-stimulating hormone (fsh)

P/S

2–8U/L (luteal):

ovulatory peak 8–15

follicular phase, & ♂: 0.5–5

postmenopausal: >30

Gamma-glutamyl transpeptidase

P

♂ 11–51; ♀ 7–33IU/L

Glucose (fasting)

P

3.5–5.5mmol/L

Growth hormone

B

<20mU/L

HbA_1c  ifcc

P

20–42mmol/mol

Iron

S

♂ 14–31µmol/L; ♀ 11–30

Lactate dehydrogenase (ldh)

P

70–250U/L

Lead

B

<1.8mmol/L

Luteinizing hormone (lh)

P/S

premenopausal: 3–16U/L

follicular: 3–12

ovulatory peak: 20–80

luteal: 3–16

postmenopausal: >l30

Magnesium

P

0.75–1.05mmol/L

Osmolality

P

278–305mosmol/kg

Parathyroid hormone (pth)

P

<0.8–8.5pmol/L

Phosphate (inorganic)

P

0.8–1.45mmol/L

Potassium

P

3.5–5.0mmol/L

Prolactin

P

♂ <450u/L; ♀ <600U/L

Prostate-specific antigen

P

0–4 mcg/mL

Protein (total)

P

60–80g/L

Red cell folate

B

0.36–1.44µmol/L

(160–640mcg/L)

Renin (erect/recumbent)

P**

2.8–4.5/1.1–2.7pmol/mL/h

Sodium

P^¶

135–145mmol/L

Thyroid-binding globulin (tbg)

P

7–17mg/L

Thyroid-stimulating hormone (tsh) NR widens with age

P

0.5–5.7mU/L

Thyroxine (t₄)

P

70–140nmol/L

Thyroxine (free)

P

9–22pmol/L

Total iron binding capacity

S

54–75µmol/L

Tri-iodothyroine (t₃)

P

1.2–3.0nmol/L

Urea

P^¶

2.5–6.7mmol/L

Urate

P^¶

♂ 210–480µmol/L

♀ 150–390µmol/L

Vitamin b₁₂

S

0.13–0.68nmol/L (>150ng/L)

Vitamin D

S

60–105nmol/L

pH: 7.35–7.45

PaCO₂:        4.7–6.0kPa

PaO₂: <10.6kPa

Base excess: ± 2mmol/L

nb: 7.6mmHg = 1kPa (atmospheric pressure ≈ 100kPa)