Clinics and Departments

Laboratory Services

Lab Dept:

Urine/Stool

Test Name:

MICROALBUMIN, TIMED URINE

General Information

Lab Order Codes:

UMAT

Synonyms:

Microalbumin, timed urine

CPT Codes:

82043 – Albumin; urine, microalbumin, quantitative
81050 – Volume measurement for timed collection
82570 – Creatinine; other source

Test Includes:

Urine Microalbumin in mg/L, Urine Creatinine in mg/dL Albumin/creatinine ratio and Urinary Albumin Excretion Rate (UAE) in ug/minute.

Logistics

Test Indications:

Increased excretion of albumin (microalbuminuria) is a predictor of future development of clinical renal disease in patients with hypertension or diabetes mellitus.

Lab Testing Sections:

Chemistry

Phone Numbers:

MIN Lab: 612-813-6280

STP Lab: 651-220-6550

Test Availability:

Daily, 24 hours

Turnaround Time:

1 day

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 entire 24 hour or timed urine collection.

Processed Volume:

Minimum: 1 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 or doctor’s office. 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:

N/A

Patient Preparation:

Sample should not be collected after exertion, in the presence of urinary tract infection, during acute illness, immediately after surgery, or after acute fluid load.

Sample Rejection:

Mislabeled or unlabeled specimens; samples contaminated with blood

Interpretive

Reference Range:

Microalbumin:

30 mg/collection

Albumin/creatinine ratio (A/C ratio):

<30 mg/g Normal

 

30-300 mg/g Microalbuminuria

 

>300 mg/g Clinical albuminuria

Urine Albumin Excretion Rate:

0 – 19 mcg/minute

Urine Creatinine:

No reference ranges established

Critical Values:

N/A

Limitations:

N/A

Methodology:

Nephelometry

References:

Siemens Dimension Vista MALB Flex Package Insert, K7062G00E0803, Rev 3/2011

Jacobs & DeMott Laboratory Test Handbook (2001) Lexi-Comp, Inc, Hudson, OH, 5th Edition

Biorad Liquichekä Urine Chemistry Control Product insert, Bio-Rad Laboratories, Irvine, CA 92618

Updates:

8/29/2005: Method change, previously listed as Immunoturbidimetric /Modified benedict/Behre.
4/29/2014: Method change, previously listed as Turbidimetric/Immunoassay - PETINIA



  Lab Test Directory
    Chemistry
    Coagulation
    Flow/Immunology
    Hematology
    Microbiology/ Virology
    Other Fluids
    Pathology
    Serology
    Transfusion Services
    Urine/Stool

  Search Lab Test Directory
    List All Documents

  Lab Staff

  E-mail Lab Services