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*URINALYSIS AND MICROSCOPIC

Mnemonic

U UAMIC

Synonym

URINALYSIS WITH MICROSCOPY - UAWMN

Specimen Collection Requirements

Patient Preparation

Males: Discard the first 25.0 mL of urine then collect without stopping the stream. Females: Spread labia while urinating.

Collect

Urine, sterile wide-mouthed container. The first morning urine is the preferred specimen, however any fresh random urine is acceptable.

Supply Item Number - 135327

Handling

Deliver to the lab ASAP or refrigerate immediately if specimen will not arrive to laboratory within 1 hour.

Preferred Volume

15.0 mL

Minimum Volume

12.0 mL

Transport

Refrigerated

Rejection Criteria

Frozen specimen, specimen collected with preservatives, urine collected in a diaper or other absorbent material

Stability

Ambient: 2 hours; Refrigerated: 12 hours

Testing Information

Performed

7 days/week

Reported

24 hours

Method

Dipstick, Microscopy

Reference Values

Reference Values

 Specific Gravity: <1.030 
 pH:  5.0-8.0
 Leukocyte Esterase:  Negative
 Nitrite:  Negative
 Protein:  Negative
 Glucose:  Negative
 Ketones:  Negative  
 Bilirubin:  Negative
 Blood:  Negative
 WBC:  0-5/hpf
 RBC:  0-3/hpf
   
  

Comments

Reducing substance by the Clinitest method is no longer performed on infants less than two years of age.
Today, all states require mandatory newborn screening for more than 30 inborn errors of metabolism. This testing detects galactosemia, which is the most common inborn error of carbohydrate metabolism. Other diseases of carbohydrate metabolism (except diabetes) have much lower prevalence or are clinically more benign than galactosemia and do not require screening of asymptomatic newborns.

Positive bilirubin dipstick results are not confirmed by an alternate method.  Recommend Serum Total Bilirubin and/or Liver Function Panel (albumin, total bilirubin, ALP, ALT, AST) if clinically indicated.  Urine bilirubin has limited value in routine screening and does not add significant information for the vast majority of patients(1). False positives may be caused by the dietary protein metabolite indoxysulfate or metabolites of the NSAID, etodolac.

(1)  Are Unexpected Positive Dipstick Urine Bilirubin Results Clinically Significant?  A Retrospective Review, Kevin F. Foley, PhD, Joseph Wasserman, BS, Lab Medicine, Volume 45, Number 1, Winter 2014.

CPT Codes

81001

Last Updated: Thursday, January 21, 2016 03:46:35 PM


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