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HelpTest Code 17OHQ 17-Hydroxycorticosteroids with Creatinine, 24-Hour Urine
Specimen Required
20 mL aliquot of a well mixed 24-hour urine
Specimen Minimum Volume
10 mL
Specimen Stability
Room temperature: 8 hours Refrigerated: 7 days Frozen: 30 days
Day(s) and Time(s) Performed
Tues-Thurs a.m.
Method Name
Colorimetric with Porter-Silber Reaction
Collection Container / Tube
Preferred: Plastic Leak Proof Container
Other Acceptable Container: None
Transport / Storage Conditions
Refrigerated
Special Instructions
Collect with 10 grams Boric Acid or 25 mL 50% Acetic Acid or 25 mL 6N HCl during collection to maintain pH below 7.5. Collect urine with preservative, or keep urine refrigerated during collection, if preservative is not used. Ship frozen if preservative is not used. Please specify on the request form and on the urine container the total 24-hour urine volume.
Reference Values
7-Hydroxycorticosteroids, 24-Hour Urine (mg/24 hours)
Infant through 1 Year Not established
1- 2 years 0.5-2.5
3- 4 years 1.0-4.0
5- 6 years 1.0-4.8
7- 8 years 1.0-5.6
9-10 years 1.0-7.0
11-12 years 1.5-8.0
13-16 year female 2.8-6.8
13-16 year male 2.0-6.0
17-20 year female 2.0-7.0
17-20 year male 3.0-10.0
Adult female 2.0-6.0
Adult male 3.0-10.0
Creatinine, 24-Hour Urine (g/24 hours)
< 3 years Not established
3-8 years 0.11-0.68
9-12 years 0.17-1.41
13-17 years 0.29-1.87
Adults 0.63-2.50
CPT Codes
82570, 83491
Analytic Time
Next day
Alias/See Also
LAB13396