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Test Code 3117 Urine Microscopic

Performing Laboratory

Barnes-Jewish Hospital Laboratory

Methodology

Note: The preferred test for routine urinalysis is #8705 Urine Reflex (Urine Macroscopic with Reflex Microscopic, if Indicated).

Method Name:

Microscopic determination of formed elements in the urine sediment. Includes all formed elements in the urine.

Literature References:

1. Henry JB, et al. Clinical diagnosis and management by laboratory methods. 20th ed. Philadelphia, PA: Saunders, 2001:388-95.
2. Brunzel NA. Fundamentals of urine and body fluid analysis. 2nd ed. Philadelphia, PA: Saunders, 2004:179-231.

Specimen Requirements

Specimen Type: Urine, random
Container/Tube: Yellow-top, conical urine collection tube
Specimen Volume: Full tube

Specimen Minimum Volume: 10 mL (3 to 8 mL specimen will be analyzed, however results may be modified by comment “<8 mL of urine received; normal range is based on 8 mL”)

Collection Instructions:

1. No additive.

2. Collect a midstream voided specimen following directions printed on outer wrapping of Urine Complete Kit.

3. Using cannula in collection cup lid, fill yellow-top, plastic, conical tube.

Additional Information:

1. Label tube with patient’s name and date of birth.

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. Specimen >12 hours old will not be tested except for non-hospital specimen having physician approval.

Day(s) Test Set Up

Monday through Sunday

Turnaround Time (STAT, Routine)   

STAT: 1 hour after receipt in laboratory

Routine: 2-4 hours after receipt in laboratory

Reference Values

WBC: 0-5/hpf
RBC: 0-3/hpf
Casts: 0/lpf

Bacteria: negative-trace/hpf
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.

Test Classification and CPT Coding

81015

Additional Information

For BJH Laboratory Use Only

Alternate Tube(s):

1 non-sterile, plastic urine container

1 plain, red top tube

Analyte Stability:

Specimen should be received in the laboratory within 1 hour of collection. Specimen >12 hours old will not be tested, except for non hospital specimen having physician approval.

Laboratory Processing Instructions:

Test performed in BJH Hematology. Performed on uncentrifuged urine using the Iris IQ200.

Specimen Transport Temperature

Ambient <1 hour/Refrigerate >1 hour OK

LOINC Code Information

Name LOINC Code
WBC Ur 46702-7
RBC Ur 46419-8
Gran Cast Ur 33393-0
Hyaline Cast Ur 33223-9
Bacteria Ur 50221-1
Yeast Ur 50240-1
Epithelial Squamous Ur 45390-2