ch40.01.08 : Conversion of SI to Conventional Units: Urine Chemistries

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	The Medical Algorithms Project

Chapter :

ch40. Unit Conversions

Section :

Unit Conversions

Conversion of SI to Conventional Units: Urine Chemistries

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Reference

Overview :

Results of chemistry tests performed on urine can be converted between conventional (US) and SI units if the conversion factors are known.

Specimen: urine

Test	SIU Units	Factor for Conversion	Conventional Units
17-Hydroxycorticosteroids (17-OHCS)	mg/mol of creatinine	0.0088	mg/g of creatinine
17-Hydroxyketosteroids (17-OHKS, cortisol)	µmol/d	0.3625	mg/24 h
17-Hydroxyketosteroids (17-OHKS, cortisol)	nmol/d	0.3625	µg/24 h
17-Ketosteroids (as DHEA)	µmol/d	0.2904	mg/24 h
5-hydroxyindoleacetic acid (5-HIAA)	µmol/d	0.19	mg/24 h
Albumin	g/d	1000	mg/24 h
Aldosterone	mmol/d	1	mEq/24 h
Aldosterone	nmol/d	0.36	µg/24 h
Amylase	U/h	5.4054	Somogyi units/h
Ascorbic acid	µmol/L	0.176	mg/dL
Calcium	mmol/d	40	mg/24 h
Catecholamines, fractionated - dopamine	nmol/d	0.153	µg/24 h
Catecholamines, fractionated - dopamine	µmol/ mol creatinine	0.0014	µg/mg creatinine
Catecholamines, fractionated - dopamine	pmol/L	0.153	pg/mL
Catecholamines, fractionated - dopamine	nmol/L	0.153	ng/mL
Catecholamines, fractionated - epinephrine	nmol/d	0.183	µg/24 h
Catecholamines, fractionated - epinephrine	µmol/ mol creatinine	0.0016	µg/mg creatinine
Catecholamines, fractionated - epinephrine	pmol/L	0.183	pg/mL
Catecholamines, fractionated - epinephrine	nmol/L	0.183	ng/mL
Catecholamines, fractionated - norepinephrine	nmol/d	0.169	µg/24 h
Catecholamines, fractionated - norepinephrine	µmol/ mol creatinine	0.0015	µg/mg creatinine
Catecholamines, fractionated - norepinephrine	pmol/L	0.169	pg/mL
Catecholamines, fractionated - norepinephrine	nmol/L	0.169	ng/mL
Chloride	mmol/d	1	mEq/24 h
Copper	µmol/d	63.69	µg/24 h
Coproporphyrin	nmol/L	0.0655	µg/dL
Coproporphyrins	nmol/d	0.6549	µg/24 h
Creatinine	mmol/d	0.1131	g/24 h
Creatinine	mmol/d	113.1	mg/24 h
Creatinine	µmol/kg•d	0.113	mg/kg/24 h
Cyclic adenosine monophosphate (cAMP)	µmol/d	0.329	mg/24 h
Cyclic adenosine monophosphate (cAMP)	µmol/ mol creatinine	0.0029	mg/g creatinine
Estrogens, total	nmol/d	0.2884	µg/24 h
Glucose	mmol/d	180.15	mg/d
Homovanillic acid (HVA)	µmol/d	0.182	mg/24 h
Homovanillic acid (HVA)	µmol/d	182	µg/24 h
Homovanillic acid (HVA)	mmol/mol of creatinine	1.61	µg/mg of creatinine
Lead	µmol/d	207.04	µg/24 h
Magnesium	mg/24 h	2.433	mmol/d
Magnesium	mmol/d	2	mEq/24 h
Metanephrines, fractionated - metanephrine	µmol/d	0.1972	mg/24 h
Metanephrines, fractionated - metanephrine	µmol/mol creatinine	1.743	mg/g creatinine
Metanephrines, fractionated - normetanephrine	nmol/L	0.183	ng/mL
Metanephrines, fractionated - normetanephrine	mmol/mol creatinine	1.621	mg/g creatinine
Muramidase (lysozyme)	mg/d	1	mg/24 h
Myoglobin	mg/L	1	mg/L
Phosphate, inorganic phosphorus	mmol/d	0.0310	g/24 h
Porphobilinogen	µmol/d	0.226	mg/24 h
Potassium	mmol/d	1	mEq/24 h
Potassium	mmol/d	39.1	mg/24 h
Pregnanediol	µmol/d	0.3205	mg/d
Protein, total	g/d	1000	mg/24 h
Reducing substances, total	mg/d	1	mg/d
Sodium	mmol/d	1	mEq/24 h
Sodium	mmol/d	22.99	mg/24 h
Urea	mol/d	28	g/24 h urea nitrogen
Uric acid	mmol/d	168.12	mg/24 h
Uropophyrin	nmol/d	0.8306	µg/24 h
Uroporphyrin	nmol / mmol creatinine	0.8801	µg/ g creatinine
Vanillylmandelic acid (VMA)	µmol/d	0.1982	mg/24 h
Vanillylmandelic acid (VMA)	mmol/ mol of creatinine	1.75	µg per mg creatinine
Xylose	mmol/L	15.01	mg/dL
Xylose	mmol/5 h	0.15	g/5 h
Zinc	µmol/d	0.0654	mg/d
∂-Aminolevulinic acid	µmol/d	0.1311	mg/24 h

References:

American Society of Clinical Pathology. SI Conversion Guide. adapted from AJCP. 1987; 87:140-151.

Conversion Table for SI Units. Transfusion 1990; 30:79-90.

JAMA Instructions for Authors. 1997; 278: 74-76.

Jordan CD, Flood JG, et al. Normal reference laboratory values. NEJM. 1992; 327: 718-724.

Lehmann HP, Henry JB. Appendix 4: SI Units. pages 1449-1462. IN: Henry JB. Clinical Diagnosis and Management by Laboratory Methods, Nineteenth Edition. W.B. Saunders. 1996.

Lundberg GD. SI Unit Implementation - the next step. JAMA. 1988; 260: 73-74.

McQueen MJ. SI Unit Pocket Guide. ASCP Press. Chicago. 1990.

Tietz NW (editor). Clinical Guide to Laboratory Tests, Third Edition. W.B. Saunders Co. 1995.

Wallach J. Interpretation of Laboratory Tests, 6th edition. Little, Brown and Company. 1996. pages 923-936.

Wallach J. Interpretation of Laboratory Tests, 7th edition. Lippincott Williams & Wilkins. 2000. page 978,

Wilson JD, Foster DW. Williams Textbook of Endocrinology, 8th Edition. W.B. Saunders Co. 1992. (front cover interleaf)

Young DS. Implementation of SI Units for Clinical Laboratory Data. Ann Intern Med. 1987; 106:114-129.

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