Catalog

UBF-04

Version 1.0

A Systematic Approach to Urine Sediment

A working method for scanning, identifying, quantifying, and reporting urine sediment so the result reflects the whole preparation, not just the most obvious field. Covers preparation and concentration factors, the fixed low-power to high-power scanning sequence, optical modes, automated particle analysis with manual confirmation, and documentation of specimen age and difficult identifications.

UBF-13

Version 1.0

Bronchoalveolar Lavage Cell Morphology

A working guide to reading bronchoalveolar lavage (BAL) cytospin differentials: how the specimen is collected and prepared, what a normal cell distribution looks like, how to judge whether a specimen is adequate to trust, how to read macrophage pigment and hemosiderin, and where the bench-level call stops and cytopathology or microbiology review begins.

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.

UBF-10

Version 1.0

CSF Cell Identification and Pattern Interpretation

Work a cerebrospinal fluid (CSF) cytospin differential from specimen receipt through a reported pattern. Learn to recognize the common CSF leukocytes and artifacts, judge whether preservation and stain quality support identification, and correlate the differential with cell counts, protein, glucose, and pending microbiology so the laboratory flags what needs review without issuing an independent diagnosis.

UBF-09

Version 1.0

CSF Collection, Processing, and Cell Counts

A low-volume, time-sensitive cerebrospinal fluid (CSF) specimen must be allocated across chemistry, microbiology, and hematology, then examined promptly for a defensible manual cell count. An adult lumbar collection demonstrates receipt, allocation, Fuchs-Rosenthal chamber setup, duplicate-side counting, calculation, and the reporting limits for a traumatic or delayed specimen.

UBF-02

Version 1.0

Dipstick Testing: What Each Pad Is Actually Detecting

A urine reagent strip carries nine or ten independent reagent pads, each running its own chemistry with its own target, timing, and limits. The reaction principle behind each common pad separates direct detection from surrogate detection, and timing, lighting, storage, and specimen mixing are analytical controls rather than housekeeping. A guided panel shows how a reactive pad is correlated with microscopy before anything is escalated.

UBF-01

Version 1.0

From Collection to Analysis: Protecting the Urine Specimen

A urinalysis result is only as good as the specimen behind it. The path from collection purpose through labeling, transport, storage, and processing determines whether a urine specimen can be accepted, rejected, recollected, or released with qualification before its analytical findings are trusted.

UBF-07

Version 1.0

How Urinary Casts Form and How to Identify Them

A practical guide to why urinary casts are shaped like the tubules that make them and how to sort a true cast from mucus, a fiber, or a loose cell clump. Covers uromodulin-based matrix formation, the low-flow and concentration conditions that favor it, and the visual criteria (parallel sides, blunt ends, three-dimensional focus) that identify a cast before naming its category. Works through hyaline, granular, cellular, fatty, waxy, broad, and mixed casts using a guided case and paired look-alike comparisons.

UBF-11

Version 1.0

Pleural and Peritoneal Fluid Evaluation

A pleural fluid case walks through container selection, gross appearance, cell count and differential, and Light's criteria calculated against paired serum results, then draws the boundary between pleural and peritoneal frameworks and between validated and unvalidated body-fluid chemistry.

UBF-14

Version 1.0

Semen Analysis: From Collection to Result Interpretation

Work through a basic semen examination from collection history through microscopic classification. Confirm abstinence, collection completeness, and timing; calculate concentration and total sperm number from raw chamber counts; classify motility using current WHO terminology; and decide what a single result set can and cannot say about fertility.

UBF-12

Version 1.0

Synovial Fluid and Crystal Examination

Work a synovial fluid aspirate from collection through compensated polarized light crystal identification. Evaluate specimen suitability, run the cell count and differential, and use shape, birefringence sign, and orientation to separate monosodium urate and calcium pyrophosphate crystals from look-alikes, without letting a crystal finding cancel a concurrent infection workup.

UBF-06

Version 1.0

Urinary Crystals without Memorizing Every Shape

Work through how urine pH, morphology, polarization, solubility, and specimen handling narrow a crystal differential, then apply that reasoning to a guided fresh-versus-refrigerated case and a set of look-alikes that require timely review.

UBF-08

Version 1.0

Using Casts in Clinical Correlation

A cast forms inside a renal tubule, so a verified cast localizes material to the nephron before any diagnosis is possible. Hyaline, cellular, granular, waxy, and fatty casts are correlated with chemistry pad results, cell counts, and renal function to show how RBC casts, marked hematuria, high albuminuria, and reduced eGFR can cohere with an intrarenal bleeding pattern. The correlation process ranks interpretations, identifies the most useful confirmatory observation, and leads to a defensible next action under local escalation policy.

UBF-03

Version 1.0

When the Dipstick and the Patient Do Not Agree

A worked approach to urine results where chemical pads, sediment microscopy, and patient history point in different directions. Covers what each pad actually measures, the specimen and analytical variables that create a mismatch, and how to choose a repeat, alternate-method, or recollection step that the evidence actually supports.