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Epic Test Code LAB21015 Urinalysis, Macroscopic Analysis

Performing Location(s)

BMC,CRH,LFH,HRK,OCH,FTT,FOX

Synonyms

Macro

Dipstick Only

Specimen Type

Random Urine

Preferred Container

Random Urine Tube

Minimum Volume to Submit for Testing

5 mL Urine

  • Multiple test can be performed from this volume. For question please contact the lab at 547-3975.  

Storage Requirements

See Causes of Rejection for temperature requirements.
May be refrigerated up to 24 hours

DO NOT USE CHEMICAL PRESERVATIVES

Transportation Needs

Deliver specimen to the laboratory within 1 hour of collection. If not possible see “Storage Requirements”

Causes For Rejections

Mislabeled or unlabeled specimen
Specimen received in container with Chemical Preservatives
>1 hrs Room Temperature
>24 hrs Refrigerated
Quantity insufficient for analysis

Limitations

All tests may be unreliable if the specimen is grossly bloody or if the color of the urine is markedly affected by metabolites from certain antibiotics. 

 

Glucose sensitivity is affected by concentrations of ascorbate greater than 50 mg/dl causing false negatives when patient samples lie between 75-125 mg/dL glucose

 

Ketone bodies (40 mg/dL) may also reduce the sensitivity of the test for specimens containing small amounts of glucose (75-125mg/dL). 

 

Specific gravity may be decreased with highly buffered urines

 

False positives for protein may be caused by highly buffered urines.

Reference Values

Macroscopic
Parameter Population Units Reference Range
Color All populations None Yellow, straw or colorless
Appearance All populations None Clear
Specific Gravity All populations None 1.003-1.024
pH All populations None 5.0-8.0
Protein All populations mg/dL Negative
Glucose All populations mg/dL Negative
Ketone All populations mg/dL Negative
Bilirubin All populations None Negative
Blood All populations None Negative
Urobilinogen All populations Eu/dL ≤ 1.0
Nitrite All populations None Negative
Leuk Esterase All populations None Negative

 

Days of Analysis

All

Available STAT

Yes

Includes

Reagent dipstick testing for urine glucose, protein, pH, specific gravity, ketones, bilirubin,urobilinogen, blood, nitrite, leukocyte esterase and gross visual examination for appearance and color.

When a UMAC is ordered, a urine sediment examination is NOT performed (see entries for Urinalysis, Routine (RTUA) and Urinalysis, Microscopic Examination (UMICO) for information on ordering a urine sediment microscopic examination)

Additional Information

Suggest early morning first voided urine for maximum concentration of urine analytes and formed elements.

Methodology

Urine reagent strip

CPT Code

81003

Last Updated

12-May-21 BHD