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Unnecessary microscopy in routine urinalysis.

P N Valenstein, J A Koepke

American Journal of Clinical Pathology

|October 1, 1984

Summary

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Omitting urine sediment microscopy in normal urinalysis may miss infections like Trichomonas. Researchers suggest reserving microscopy for specimens with abnormal physicochemical tests to optimize laboratory resource use.

Area of Science:

Clinical chemistry
Medical laboratory science
Urology

Background:

Urine testing is a common diagnostic tool.
Physicochemical urinalysis provides initial screening.
Urine sediment microscopy offers detailed analysis but requires resources.

Purpose of the Study:

To evaluate the impact of omitting urine sediment microscopy in patients with normal physicochemical urinalysis results.
To identify clinically significant pathologic states potentially missed by excluding microscopy.
To determine the clinical utility of urine microscopy in specific patient subgroups.

Main Methods:

Retrospective review of laboratory and clinical data.
Analysis of 1,000 patient cases.
Comparison of outcomes between patients with and without urine sediment microscopy.

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Main Results:

Omission of microscopy in normal physicochemical tests may overlook Trichomonas infections and significant bacteriuria.
The clinical benefit of performing microscopy in these specific overlooked cases was uncertain.
No significant difference in clinical outcomes was clearly demonstrated for these specific omissions.

Conclusions:

Urine sediment microscopy may be reserved for specimens exhibiting physicochemical abnormalities.
This approach could help optimize laboratory resource allocation.
Further research may be needed to clarify the precise clinical indications for urine microscopy.