Silica and barium: Comparison of microscopic appearance and characterization of effects of silica on cytomorphology

IF 1.1 4区农林科学 Q3 VETERINARY SCIENCES Veterinary clinical pathology Pub Date : 2023-12-14 DOI:10.1111/vcp.13288

Laura A. Cagle, Michael M. Fry, Kenneth B. Wesley, Sarah S. K. Beatty

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Abstract

Background

Silica from plastic red top sample collection tubes and barium cause recognized artifacts in slide preparations for microscopic examination.

Objectives

The objectives of this study were to evaluate and directly compare the microscopic appearance of silica and barium particles and various slide preparation techniques (e.g., use of coverslips, oil immersion, and different stains). A secondary objective of this study was to evaluate the effects of silica particles on cellular morphology after mechanical trauma with cytocentrifugation.

Methods

Fluid samples (deionized water, pleural effusion, peritoneal effusion, cerebrospinal fluid, and urine) were collected and evaluated in silica- and non-silica-containing tubes. Barium was added to silica and non-silica samples. Direct and cytocentrifuge preparations were compared to evaluate the effect of silica particles on cellular morphology. Preparations were stained with Wright–Giemsa, rhodizonic acid disodium salt, Alizarin Red, Grocott's methenamine silver, and Prussian blue.

Results

Silica and barium particles were identifiable via light microscopy with and without polarized light, although silica particles diminished with immersion oil. Barium particles retained their structure and diminished less under oil. Cytoseal mounting medium for coverslip placement resulted in diminished refractility of silica and some barium particles. Silica particles with mechanical interaction during cytocentrifugation resulted in disrupted cellular morphology with many lysed cells. Silica and barium particles were negative for all special stains tested.

Conclusions

Silica from plastic red top tubes adversely affects cell morphology in cytocentrifuge preparations, potentially affecting manual differential cell counts and compromising diagnostic interpretation. Samples intended for microscopic evaluation should not be collected in silica-containing tubes.

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来源期刊

Veterinary clinical pathology 农林科学-兽医学

CiteScore

1.70

自引率

16.70%

发文量

133

审稿时长

18-36 weeks

期刊介绍： Veterinary Clinical Pathology is the official journal of the American Society for Veterinary Clinical Pathology (ASVCP) and the European Society of Veterinary Clinical Pathology (ESVCP). The journal''s mission is to provide an international forum for communication and discussion of scientific investigations and new developments that advance the art and science of laboratory diagnosis in animals. Veterinary Clinical Pathology welcomes original experimental research and clinical contributions involving domestic, laboratory, avian, and wildlife species in the areas of hematology, hemostasis, immunopathology, clinical chemistry, cytopathology, surgical pathology, toxicology, endocrinology, laboratory and analytical techniques, instrumentation, quality assurance, and clinical pathology education.