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Lab Manual for Moffitt-Long and Mount Zion

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Urinalysis, Microscopic

Item Value
Approval req'd? Yes, contact Hematology at 415-353-1747 for testing on samples with negative dipstick results for protein, esterase and hemoglobin. .
Available Stat? Yes
Test code UMIO (microscopy alone) or UAWM (with macroscopic urinalysis)
Test group Urinalysis
Performed by Parnassus & Mt. Zion Hematology
In House Availability Test available 24 hours per day 7 days per week
Method Dipstick and microscopy
Collection Instructions First AM void preferred. Deliver sample to lab asap. Refrigerate samples if delivery is delayed. Testing is optimal when done within 1-2 hours of collection.
Container type Urine cup
Amount to Collect See preferred volume
Sample type Random urine
Preferred volume 20 mL urine
Min. Volume 3 mL urine
UCSF Rejection Criteria Samples received > 4 hours after collection.
Processing notes Deliver all urinalysis samples to Hematology as soon as possible after receipt. If collection time is unknown, use receipt time for stability. Sample suitability from 2-4 hours is decided in Hematology
Normal range See Urinalysis, Macroscopic for dipstick testing normal ranges.

Microscopy normal ranges:

< 5 WBC/HPF
< 3 RBC/HPF

Data based on minimum sample size of 10 mL and may not be applicable to samples of less than 10 mL.
Synonyms UA; Urine sediment
Stability 2 hours at room temperature; 4 hours if refrigerated. For optimum results, the urine sample must be tested within 1-2 hours of collection, regardless of storage method.
Turn around times 2 hours
Additional information Urinalysis samples should be delivered as soon as possible after collection. Delayed transport of an unpreserved urine may lead to loss of red cell casts and other formed elements Refrigeration of urine inhibits bacterial growth, but does not prevent the lytic effects of low specific gravity or alkaline pH. Urine crystal formation may be induced by refrigeration.

Crystals are reported as "present", if found, other formed elements (e.g., casts) are semi-quantitated and reported as 1-5, 5-10 or > 10 per Low Power Field (LPF).

Microscopy will automatically be canceled if the dipstick test does not detect at least trace amounts of protein, esterase or hemoglobin.
CPT coding 81001 (UA w/micro), 81015 (micro only)
Last Updated 3/24/2013 7:35:46 PM
Entry Number 971
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