Pathology Handbook

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Creatinine

Laboratory:

Clinical Biochemistry

Test Code:

Specimen Types:

Blood

Container Types:

Lithium Heparin (with Gel)
SST

Adults Volume or Mass:

5 mL

Minimum/Paediatric Volume or Mass:

1 mL

Test performed at:

Alfred Hospital
Sandringham Hospital

Transport Instructions between Sites and/or Laboratories:

RoomTemp within Alfred/Esky from External sites

Assay Frequency:

24/7

MBS Rebatable:

Yes

MBS Item No.:

66500

Additional Notes:

Reference Intervals (Adult 19yrs+):

Male: 60—110 umol/L
Female: 45—90 umol/L

Source:

RCPA/AACB Harmonised Reference Intervals from 13/7/2015.

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

Assay methods are affected differently by interferences. Where necessary to resolve discrepancies, an enzymatic method is available after consultation.

Age Related Reference Intervals:

Male and Female

< 1 wk 22 - 93 umol/L

1 wk - < 4 wks 17 - 50 umol/L

4 wks - < 2 yrs 11 - 36 umol/L

2 yrs - < 6 yrs 20 - 44 umol/L

6 yrs - < 12 yrs 27 - 58 umol/L

Female

12 yrs - < 15 yrs 35 - 74 umol/L

15 yrs - < 19 yrs 38 - 82 umol/L

Male

12 yrs - < 15 yrs 35 - 83 umol/L

15 yrs - < 19 yrs 50 - 110 umol/L