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Test ID ORTHP Orthostatic Proteinuria, Random, Urine

Specimen Required

Patient Preparation: Specimens should be collected before fluorescein is given or not collected until at least 24 hour later.

Container/Tube: Plastic, 5-mL tube

Specimen Volume: 4 mL

Collection Instructions:

1. This is a nighttime (supine) collection.

2. Void immediately prior to lying down to sleep.

3. Collect an 8-hour (nighttime) urine specimen.

4. Upon awaking in the morning, the patient should immediately void into the specimen cup.

4. No preservative.

5. Invert well before taking 4-mL (maximum) aliquot.

Useful For

Diagnosis of orthostatic proteinuria

Profile Information

Test ID Reporting Name Available Separately Always Performed
PRCON Protein, Total, Random, U No Yes
RATO2 Protein/Creatinine Ratio No Yes
CRETR Creatinine, Random, U No Yes

Method Name

PRCON: Turbidimetry

CRETR: Enzymatic Colorimetric Assay

RATO2: Calculation

Reporting Name

Orthostatic Proteinuria, Random, U

Specimen Type


Specimen Minimum Volume

1 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Urine Refrigerated (preferred) 14 days
  Frozen  30 days
  Ambient  24 hours

Reference Values


≥18 years: <0.18 mg/mg creatinine


CREATININE:≥18 years = 16-326 mg/dL

Reference values have not been established for patients younger than 18 years of age.

Day(s) Performed

Monday through Sunday

Report Available

Same day/1 day

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Test Classification

This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.

CPT Code Information

CRETR- 82570

PRCON- 84156

LOINC Code Information

Test ID Test Order Name Order LOINC Value
ORTHP Orthostatic Proteinuria, Random, U 87434-7


Result ID Test Result Name Result LOINC Value
CRETR Creatinine, Random, U 2161-8
PRCON Protein, Total, Random, U 2888-6
RATO2 Protein/Creatinine Ratio 2890-2