LESSON 5 5 Microscopic Examination of Urine Sediment

LESSON 5 -5 Microscopic Examination of Urine Sediment

Overview Components of urine sediment Cells Casts Crystals Procedures for examining sediment Compare results to chemical and physical examinations Significance of results

Cells in Urine Sediment Blood cells RBCs WBCs Epithelial cells

Cells in Urine Sediment Microorganisms Bacteria Yeasts Protozoa Spermatozoa

Cells in Urine Sediment

Casts in Urine Sediment Hyaline Granular Cellular Waxy

Casts in Urine Sediment Clinical significance See Table 5 -12

Crystals and Amorphous Deposits In normal acid urine In normal neutral or alkaline urine See Table 5 -13

Crystals

Clinically Significant Crystals in Urine See Table 5 -14 Cystine Leucine Tyrosine Cholesterol Sulfa Hippuric acid Radiographic media

Clinically Significant Crystals in Urine

Other Substances in Urine Sediment Mucus Contaminants Starch granules Cotton fibers Oil droplets

Procedure Safety precautions Quality assessment Follow facility’s SOP manual Specimen collection Preparing sediment Commercial systems help standardize

Commercial Systems Censlide System

Commercial Systems KOVA System

Procedure Counting components See Table 5 -15 Reporting results Reference values See Table 5 -16

Automation Urine analyzers Digital imaging Flow cytometry

Significance of Results Compare physical, chemical, and microscopic results See Table 5 -17 Correlate results with patient condition See Table 5 -18