Creatinine, Urine

Overview
Department	Biochemistry
Test Code	UCRN
Synonyms	UCRN
Test Availability	Monday - Sunday, testing routinely available out of hours
Turnaround Time	1 – 4 hours
Stability – Add test
Specimen Requirements
Specimen Type	Timed or random urine collection.
Specimen Transportation
Preferred	Sterile pottle
Acceptable
Unacceptable
Paediatric Requirements
Aliquot Requirements
Sample Type	Urine
Preferred Volume
Minimum Volume	200µL
Aliquot Transportation
Clinical Information
Reference Intervals	Random collection: Diet & hydration state dependent.  Timed collection 0 - 6 mth 0.2 – 1.6, mmol/24 hrs >6 mth - 2 yrs 0.2 - 2.0, mmol/24 hrs >2 - 6 yrs 0.5 - 6.0, mmol/24 hrs >6 - 10 yrs 1.5 - 12.6, mmol/24 hrs >10 - 15 yrs 2.0 - 20.0, mmol/24 hrs > 15 yrs male , 9.0 - 18.0, mmol/24 hrs > 15 yrs female 7.0 - 12.5, mmol/24 hrs Note: Creatinine excretion is dependent on lean body mass. Normal excretion Males 0.12 - 0.23 mmol/kg/24 hr Females 0.10 - 0.18 mmol/kg/24 hr
Test Method	Ci8200 analyser, Abbott reagents.  Based on Jaffe reaction
Advanced Notice	Not Required
Patient Preparation
Comments
Endogenous creatinine production is known to be related to muscle mass and metabolism. Higher levels are found in males.