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Test Code LAB66 Creatinine, Plasma or Serum

Reporting Title

Creatinine

Methodology

These  methods have been standardized against ID-MS.

Roche Diagnostics, Jaffe Kinetic Alkaline Picrate at RMH, GMC, DH,  DMH, GMH, WECC, PMC, DHC, GCMH, BH, OBH, MGH, HMH, SH

 Note:  Hemoglobin F interferes with this method. We recommend that a whole blood creatinine be run on infants through the first year of life.

Creatinine is normally excreted by glomerular filtration. It is useful in diagnosing and monitoring acute and chronic renal disease and in monitoring dialysis.

 

Performing Laboratory

OhioHealth Laboratory Services-RMH,GMC,DH,DMH, WECC, PMC, DHC, MGH, GMH, HMH, OBH, MH, SH, GCMH, BH Core Laboratories

Specimen Requirements

Collection Instructions:

1. Serum and Plasma gel tubes should be centrifuged within 2 hours of collection.

2. Red-top tubes should be centrifuged and aliquoted within 2 hours of collection.

 

Submit only 1 of the following specimens:

 

Preferred:

Serum

Draw blood in a gold-top serum gel tube(s). Spin down and send 1 mL of serum refrigerated. 

Note:

1. A speckled-top serum gel tube (s) or a plain, red-top tube(s) is also acceptable.

2. Indicate serum on request form.

3. Label specimen appropriately (serum).

 

Alternate: 

Plasma

Draw blood in a mint green-top (heparin) gel tube(s). Spin down and send 1 mL of heparinized plasma refrigerated. 

Note:  1. Indicate plasma on request form.

2. Label specimen appropriately (plasma).

Specimen Stability Information

 

Specimen Type Temperature Time
Serum or plasma Refrigerated 7 days
  Ambient  7 days
  Frozen  3 months

 

Specimen Transport Temperature

Refrigerate/Ambient OK/Frozen OK

Reference Values

Males

0-5 days:  0.3-1.0 mg/dL

6-30 days:  0.3-0.7 mg/dL

31 days-1 year:  0.2-0.4 mg/dL

2-12 years:  0.3-0.7 mg/dL

13-18 years:  0.5-1.0 mg/dL

19-60 years:  0.5-1.3 mg/dL

61-90 years:  0.8-1.3 mg/dL

>91 years:  1.0-1.7 mg/dL

Critical value >9.0 mg/dL

Alerting category: First instance called within 1 hour

 

Females

0-5 days:  0.3-1.0 mg/dL

6-30 days:  0.3-0.7 mg/dL

31 days-1 year:  0.2-0.4 mg/dL

2-12 years:  0.3-0.7 mg/dL

13-18 years:  0.5-1.0 mg/dL

19-60 years:  0.4-1.1 mg/dL

61-90 years:  0.6-1.2 mg/dL

>91 years:  0.6-1.3 mg/dL

Critical value >9.0 mg/dL

Alerting category: First instance called within 1 hour

 

Day(s) Test Set Up

Monday through Sunday; Continuously

Test Classification and CPT Coding

82565