Urinalysis, Routine With Microscopic Examination on Positives *

Detect abnormalities of urine; diagnose and manage renal diseases, urinary tract infection, urinary tract neoplasms, systemic diseases, and inflammatory or neoplastic diseases adjacent to the urinary tract

Limitations
Insufficient volume may limit the extent of procedures performed. Metabolites of Pyridium® may interfere with the dipstick reactions by producing color interference. High vitamin C intake may cause an underestimate of glucosuria, or a false-negative nitrite test. Survival of WBCs is decreased by low osmolality, alkalinity, and lack of refrigeration. Sperm is not reported in routine urinalysis exams. Spermatozoa may be seen in male urine related to recent or retrograde ejaculation. For sperm reporting in males only, order Postejaculatory Urine Microscopic Examination for Sperm [133116].

Specimen
Urine (random)

Volume
10 mL

Minimum Volume
2 mL

Container
BD urine transport tube (preferred) or urine cup (STAT/DAY lab setting)

Collection
A voided specimen is usually suitable. If the specimen is likely to be contaminated, a clean-catch, midstream specimen is desirable.

Storage Instructions
BD urine transport tube: Refrigerated or room temperature for up to 72 hours.
Urine cup: Room temperature up to 2 hours and refrigerated up to 48 hours.

Causes for Rejection
Quantity not sufficient for analysis; improper labeling; tubes with boric acid or tartaric acid (eg, BD gray-top C&S tube); LabCorp red-top C&S tube; Boricon, Bortiex, or Boricult yellow-top C&S tubes; specimen received in BD urine transport tube more than 72 hours old; specimen received in urine cup stored at room temperature greater than 2 hours old; specimen received in urine cup refrigerated more than 48 hours old; frozen specimens