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Module UBF-05 · Version 1.0

Cells, Organisms, and Common Artifacts in Urine Sediment

A practical guide to sorting red cells, white cells, epithelial cells, yeast, bacteria, sperm, motile organisms, and common artifacts on manual urine microscopy. Builds a size-first, feature-based approach using the red blood cell as an internal ruler, then applies it to a guided case and a classification decision.

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Who this module is for

Clinical laboratory scientists and students learning manual urine sediment microscopy who already know reagent-strip (dipstick) urinalysis testing.

Learning objectives

  • Identify RBCs, WBCs, squamous, transitional/urothelial, and renal tubular epithelial cells using size, border, and internal detail
  • Recognize yeast, bacteria, sperm, Trichomonas-like motility, and common contaminants within the scope of routine image-atlas identification
  • Differentiate cells and organisms from oil droplets, starch, air bubbles, fibers, pollen, mucus, and precipitate artifacts

How completion works

Mark every required section done and answer every knowledge check in those sections correctly. The final save completes the module automatically.

Sources

11 sources

  1. 1. Centers for Medicare & Medicaid Services. 42 CFR Section 493.1251, Standard: Procedure manual. Federal regulation. https://www.ecfr.gov/current/title-42/chapter-IV/subchapter-G/part-493/subpart-K/subject-group-ECFRb7be493b9d3bde6/section-493.1251.

    Source note · federal guidance

  2. 2. Centers for Medicare & Medicaid Services. 42 CFR Section 493.1252, Standard: Test systems, equipment, instruments, reagents, materials, and supplies. Federal regulation. https://www.ecfr.gov/current/title-42/chapter-IV/subchapter-G/part-493/subpart-K/subject-group-ECFRb7be493b9d3bde6/section-493.1252.

    Source note · federal guidance

  3. 3. Clinical and Laboratory Standards Institute. H56: Body Fluid Analysis for Cellular Composition; Approved Guideline, 2nd ed. Wayne, PA: CLSI; 2021.

    Source note · consensus standard

  4. 4. Fogazzi GB. The Urinary Sediment: An Integrated View. 3rd ed. Milan: Elsevier; 2010.

    Source note · laboratory reference

  5. 5. Delanghe J, Speeckaert M. Preanalytical requirements of urinalysis. Biochem Med (Zagreb). 2014;24(1):89-104. doi:10.11613/BM.2014.011.

    Source note · peer-reviewed literature

  6. 6. Polloni TS, et al. Urine sediment findings and the immune response to pathologies in fungal urinary tract infections caused by Candida spp. J Fungi (Basel). 2020;6(4):245. doi:10.3390/jof6040245.

    Source note · peer-reviewed literature

  7. 7. Morgan DJ, et al. Deconstructing the urinalysis: A novel approach to diagnostic and antimicrobial stewardship. Infect Control Hosp Epidemiol. 2021;42:999-1004. doi:10.1017/ice.2020.1248.

    Source note · peer-reviewed literature

  8. 8. Siemens Healthcare Diagnostics. Multistix 10 SG Reagent Strips: Instructions for Use. Manufacturer labeling.

    Source note · manufacturer labeling

  9. 9. Centers for Disease Control and Prevention. Trichomoniasis, STI Treatment Guidelines, 2021.

    Source note · professional society guidance

  10. 10. Chan RC, et al. The wobbling pears in urine. Clin Case Rep. 2018;6:2015-2016. doi:10.1002/ccr3.1755.

    Source note · peer-reviewed literature

  11. 11. LatticeMLS editorial synthesis of CAP checklist, CLSI, and peer-reviewed sources for urine sediment cell, organism, and artifact identification, including the guided case.

    Source note · module-authored