Pathology

Test & Collection Guide

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Creatinine - Blood

Alternate names:

Cr, Creat

Laboratory:

Biochemistry

Test Code:

Specimen types:

Serum

Container types:

Serum tube with gel

Collection Instructions:

Transport specimen at Room Temperature to lab
Sample haemolysis may make this test unreportable

Minimum Adult Volume:

1 mL

Paediatric Minimum Volume:

0.5 mL

Frequency:

Daily

Result Turnaround Time:

4 hours

Reference Interval:

Units:	umol/L
Age	Range
0W - <1W	22 – 93
1W - <4W	17 – 50
4W - <2Y	11 – 36
2Y – <6Y	20 – 44
6Y – 12Y	27 – 58

Male
Age	Range
12Y - <15Y	35 – 83
15Y - <19Y	50 – 100
19Y - 120Y	60 - 110

Female
Age	Range
12Y - <15Y	35 – 74
15Y - <19Y	38 – 82
19Y - 120Y	45 – 90

Laboratory Use Only

Storage Instructions:

Falsely rasied creatinine values may be obtained in therapy with ascorbic acid and in the presence of ketones, alpha-methyldopa, haemolysis or high glucose concentrations

Cephalosporins in high concentration also give falsely raised serum creatinine

Blood samples for creatinine should not be taken within one hour of i.v. Cephalosporin administration