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Urinalysis (UA) with Reflex Culture (aka Urine Macroscopic with Reflex Microscopic and Culture, if Indicated)

Important Note

Specimen site must be filled in on ordering.

Performing Lab(s)

Memorial-Belleville & Memorial-Shiloh

Methodology

  • If there are abnormal dipstick findings (Protein≥1+, any Blood, Nitrite or Leukocyte esterase), then #3117 Urine Microscopic will be performed at an additional charge.
  • If WBCs > 10/hpf, a #M052 Culture, Routine, Aerobe will be performed at an additional charge.

Specimen Requirement (s)

Specimen Type: Urine, random

Container/Tube: Yellow/red-top UA preservative tube and 1 Grey-top C&S Preservative Tube - Both tubes must be sent together.

Specimen Volume: Full tubes

Specimen Minimum Volume:

Urinalysis: 10-15 mL 

Collection Instructions:

  1. Collect a midstream voided specimen following directions printed on outer wrapping of Urine Complete Kit.
  2. Using cannula in collection cup lid, fill yellow-top, plastic, conical tube.

Additional information:

  1. Label tubes according to current procedure.
  2. A catheterized specimen is acceptable.
  3. Provide collection date and time, and method of collection.
  4. If storage and transport is >1 hour, refrigerate specimen.
  5. Specimen should be received in the laboratory within 1 hour of collection. 

Day(s)/Shift(s) Test Set Up and Turnaround Time

Sunday through Saturday

Hours: 24 hours

 

Turnaround Time: (UA)

STAT: 45 minutes

Routine: less than 4 hours from receipt

 

Turnaround Time: (Culture)

See entry in catalog for aerobic culture

Transport and Stability

Transport temperature: Ambient to lab

Reference Values

  • Specific gravity: 1.003-1.030
  • pH:"Urine pH is affected by diet, medications, systemic acid-base disturbances, and renal tubular function. pH may affect urinary stone formation. For example, urine pH below 6.0 may help reduce the tendency for calcium phosphate stones and pH greater than 6.0 may reduce the tendency for uric acid stone formation.

Information obtained from Mayo Medical Laboratories test catalog 2/20/18."

  • Protein: Negative
  • Glucose: Negative
  • Ketones: Negative
  • Occult blood: Negative
  • Urobilinogen: <2.0 mg/dL
  • Nitrites: Negative
  • Leukocyte esterase: Negative

See individual test listings for other reference values.

Literature References:

1. Henry JB, et al.  Clinical diagnosis and management by laboratory methods.  20th ed. Philadelphia, PA: Saunders, 2001:1432-34

2. Brunzel NA. Fundamentals of urine and body fluid analysis. 2nd ed. Philadelphia, PA: Saunders, 2004:419.

CPT/LOINC Codes

81001

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