Clinics and Departments

Laboratory Services

Lab Dept:

Urine/Stool

Test Name:

CORTISOL, FREE, TIMED URINE

General Information

Lab Order Codes:

UCOT

Synonyms:

Quantitative Urine Free Cortisol

CPT Codes:

82530 – Cortisol; free
82570 – Creatinine, other source

Test Includes:

24 hr urine volume, Free cortisol urine in ug/24 hr, Free cortisol urine in ug/dL, Free cortisol/creatinine ratio, 24 hr creatinine in mg/24 hr and creatinine urine in mg/dL

Logistics

Test Indications:

N/A

Lab Testing Sections:

Urine/Stool - Sendouts

Referred to:

Esoterix, Inc

Phone Numbers:

Minneapolis:

Saint Paul:

 

612-813-6280

651-220-6550

Test Availability:

Daily, 24 hours

Turnaround Time:

4 - 6 days, test set up Monday and Thursday. Assay time is 3 days.

Special Instructions:

Submit an entire 24-hour urine collection. No preservative. Refrigerate specimen during and after collection.

Note: Starting and ending times of collection are required for a timed urine collection and must be documented electronically or on the proper request form.

Specimen

Specimen Type:

Urine, timed collection

Container:

Plastic leakproof container (No preservative). Urine GUARD® collection container is preferred for a timed urine sample.

Draw Volume:

Submit an entire 24-hour urine collection

Processed Volume:

50 mL (Minimum: 5 mL) urine

Collection:

For timed urine collections, empty the bladder, discard the voided sample, and note the start time. Collect all urine voided for the specified time period. At the end of the period, note the finishing time, add the last voided sample to the container by emptying the bladder. Bring the refrigerated container to the lab. Make sure all specimens submitted to the laboratory are properly labeled with the patient’s name, medical record number and date of birth.

Special Processing:

Lab Staff: Add boric acid (0.5 g/100 mL) as preservative to finished collection. Mix sample well. Record 24 hour volume. Remove a 50 mL aliquot (Minimum: 5 mL) urine. Store and ship urine aliquot frozen.

Patient Preparation:

None

Sample Rejection:

Mislabeled or unlabeled specimens

Interpretive

Reference Range:

Free Cortisol, Urine ug/24 hours

Prepubertal

3 - 9

Adult Males

11 - 84

Adult Females

10 - 34

Pregnancy

16 - 80

Free Cortisol, Urine ug/dL

No reference ranges available

Free Cortisol/Creatinine Ratio

Prepubertal

7 - 25

Adult Males

7 - 45

Adult Females

9 - 32

Pregnancy

14 - 59

24 hr Urine Creatinine mg/24 hr

Males

800 - 2000

Females

600 - 1800

Creatinine Urine mg/dL

No reference ranges provided by reference lab

Critical Values:

N/A

Limitations:

N/A

Methodology:

Radioimmunoassay (RIA) after Chromatography

References:

Esoterix, Inc Web Page www.esoterix.com July 2012



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