[Haematology] Microscopic Examination of Urinary Sediment - OTHER ARTIFACTS

OTHER ARTIFACTS, Microscopic Examination of Urinary Sediment, Graff's Textbook of Urinalysis and Body Fluids

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1. [Haematology] Microscopic Examination of Urinary Sediment - Cells

2. [Haematology] Microscopic Examination of Urinary Sediment - Crystals

3. [Haematology] Microscopic Examination of Urinary Sediment - CASTS

4. [Haematology] Microscopic Examination of Urinary Sediment - MISCELLANEOUS STRUCTURES

5. [Haematology] Microscopic Examination of Urinary Sediment - ARTIFACTS AND CONTAMINANTS

OTHER ARTIFACTS

Some of the other types of debris or extraneous material which may be found in the urinary sediment include hair (Fig. 5-66); glass fragments (Fig. 5-67), aswell as scratches on the microscope slide; air bubbles (Fig. 5-68); pollen granules; and talcum powder, which is usually formed from silicate sources and, thus, the particles have rather angular shapes (Fig. 5-69). Urine may be contaminated with fecal material and may, therefore, contain vegetable fibers, muscle fibers, and tissue strands (Fig. 5-70). These structures should be recognized as being fecal contaminants. 

Figure 5-66. Hair and a coarsely granular cast. Viewed with an 80A filter (400x).

Figure 5-67. Glass fragments. These are frequently present 

if a glass pipette is used to transfer the sediment to the slide (400x).

Figure 5-68. Air bubble and amorphous urates (160x)

Figure 5-69. Talcum powder particles (160x)

Figure 5-70. Fecal contamination. Field also contains triple phosphate crystals (100x).

REFERENCES 

Lillian A. Mundt and Kristy Shanahan, Graff's Textbook of Urinalysis and Body Fluids, Second Edition 2011