TEST DIRECTORY | MIDx Labs

CREATININE (CREA)

Primary marker of kidney (glomerular filtration) function.

LIS TEST CODE: CREA

CPT CODE: 82565

ALIASES: CREA, eGFR, CKD-EPI

METHODOLOGY: Kinetic Alkaline Picrate

SPECIMEN:

- Type: Serum

- Container: Gold Top (SST) Vacutainer

- Minimum Volume Required: 1 mL

- Storage/Handling: Allow 30 minutes for blood to clot, then centrifuge specimen at 3500 RPM for 10 minutes. Maintain specimen at room temperature, in the refrigerator, or in the freezer until testing can be performed.

NOTE: If freezing is required to preserve stability, transfer serum into a separate plastic screw-cap transport container.

- Stability:

Room Temperature (20-25 °C): 7 days

Refrigerated (2-8 °C): 7 days

Frozen (-20 °C or colder): 3 months; avoid multiple freeze/thaw cycles.

- Turnaround Time: 24 hours from receipt.

Special Instructions: N/A

REJECTION REASONS: QNS, Gross Hemolysis, Gross Lipemia, Contamination, Stability Violation, Expired Container, Incorrect Container

REFERENCE RANGES:

Males (mg/dL)

1 - 5 years of age: 0.19 - 0.49

6 - 10 years of age: 0.26 - 0.61

11 - 14 years of age: 0.35 - 0.86

>= 15 years of age: 0.74 - 1.35

Females (mg/dL)

1 - 5 years of age: 0.19 - 0.49

6 - 10 years of age: 0.26 - 0.61

11 - 15 years of age: 0.35 - 0.86

>= 16 years of age: 0.59 - 1.04

Panic Threshold(s): >= 2.5 mg/dL for Males & Females 1 - 10 years of age; >= 3.0 for Males & Females 11 - 14 years of age; >= 10.0 mg/dL for Males & Females >= 15 years of age.