est GFR using Plasma Crn and CKD-EPI equation, Plasma

Department

Core Biochemistry

Delphic Registration Code

GFR

Constituent Tests

• Creatinine, Plasma

Synonyms

eGFR
Estimated Creatinine Clearance
Estimated Glomerular Filtration Rate
Plasma Crn and MDRD

Turnaround Time

3 hours

Test Code

7489

Specimen Type

• Serum
• Plasma

Specimen Requirements

Tube/Container Type:

Preferred

• Lithium Heparin - Non-gel (Green Cap)

Acceptable

• Serum (Red Cap)
• SST II (Gold Cap)
• Lithium Heparin - Gel (Light Green Cap)

Preferred Sample Volume (ml)

4.5

No of Samples Required

1

Paediatric Specimen Requirements

Tube/Container Type:

Preferred

• Lithium Heparin - Non-gel (Green Cap)

Preferred Sample Volume (ml)

0.6

Additional Specimen Information

Paediatric Specimen - Microtainer, Lithium heparin

Aliquot Instructions

Sample Type

• Serum
• Plasma

Minimum Volume (ml)

0.2

Transport to Lab

Ambient (8 - 24 degrees Celsius)

Interpretation

Estimated GFR is only reliable under steady state conditions (stable Creatinine >4 days). Caution should be used in interpretation in non-Caucasians, extremes of body weight, pregnancy, oedematous subjects, low Creatinine (<0.06mmol/L) and other complex cases. GFR declines by 1 ml/min/year over 40 years.

Children < 16 years- no calculation done

Reference Intervals

80 – 120 ml/min/1.73 m2

Test Method

Calculated using measured plasma creatinine and CKD-EPI prediction equation

Contact Canterbury Health Laboratories on +64 3 364 0484 or email LabInfo@cdhb.health.nz

Contact Information

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