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Test & Collection Guide

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Creatinine - Blood

Alternate names:
Cr, Creat
Laboratory:
Biochemistry
Test Code:
CR
Specimen types:
Serum
Container types:
Serum tube with gelSerum 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

Pathology Handbook

Test & Collection Guide

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