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*Renal Function Panel with Estimated Glomerular Filtration Rate (GFR)

Mnemonic

RENALGFR

Includes

Albumin, Calcium, Total CO2, Chloride, Creatinine, Glucose, Phosphorus, Potassium, Sodium, Urea Nitrogen (BUN), Estimated GFR

Guidelines

The GFR is used to assess kidney function and any evidence of chronic kidney disease. Estimated GFR is not reported for patients under 18 years of age.

Specimen Collection Requirements

Patient Preparation

Recommended 8-14 hour fasting specimen for Glucose

Collect

Serum or Plasma, one 5.0 mL gold (SST), 7.0 mL red or 3.0 mL mint green (lithium heparin, PST) top tube

Handling

Allow serum to clot completely at room temperature (minimum – SST: 30 minutes, red top tubes: 60 minutes).  Preferably, separate serum or plasma from cells within one hour of collection.

Preferred Volume

1.0 mL serum or plasma

Minimum Volume

0.5 mL Serum or Plasma, (Whole Blood 1.2 mL minimum draw)

Transport

Refrigerated (2-8°C)

Rejection Criteria

Moderately hemolyzed specimens

Stability

AFTER SEPARATION FROM CELLS:  Room Temperature (18-26°C): 8 hours; Refrigerated (2-8°C): 3 days; Frozen (at or below -20°C): 1 month

Testing Information

Performed

7 days/week

Reported

24 hours

Method

Colorimetry, Ion Selective Electrode, Enzymatic

Reference Values

Reference Values

See specific test.
Age adjusted ranges.

GFR Reference Range (mL/min/1.73m2)

Description

Stage of Chronic Kidney Disease (CKD)

≥60

Normal

None

Kidney damage with normal GFR

1

Kidney damage with mildly decreased GFR

2

30-59

Moderate CKD

3

15-29

Severe CKD

4

0-14

Kidney Failure

5


Critical Values

See specific tests

Comments

GFR is calculated using the IDMS-traceable MDRD study equation from serum or plasma creatinine, age, gender and race.

 

Refer to specific tests for interferences.

CPT Codes

80069

Last Updated: Thursday, May 14, 2020 01:25:25 AM


Client Services: 503-413-1234