Week 10: Abnormal UA Seds Oval fat bodies Microorganisms Abnormal crystals Artifacts.
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Transcript of Week 10: Abnormal UA Seds Oval fat bodies Microorganisms Abnormal crystals Artifacts.
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Week 10: Abnormal UA Seds
• Oval fat bodies
• Microorganisms
• Abnormal crystals
• Artifacts
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Oval Fat Bodies
• Degenerated renal tubular epithelia
• Fat globules may show Maltese cross pattern in polarized light
• Clinically significant
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Oval Fat Bodies
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Cystine
• Aminoaciduria may be due to overflow, inability to reabsorb, or abnormal amino acids
• Cycstine is sulfur containing amino acid.• Clear hexagonal plate that may resemble uric acid• Cystinuria: hereditary impairment of proximal
tubule to reabsorb cystine, lysine, ornithine, arginine. Cystine kidney stone.
• Cystinosis: hereditary condition where cystine deposits throughout the body. Most common cause of Fanconi’s syndrome.
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Cystine
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Tyrosine
• Fine needles
• May see in liver disease
• Tyrosinosis: faulty tyrosine metabolism
• Tyrosine is a naturally occurring amino acid. Product of phenylalanine metabolism and precursor of melanin, catecholamines, thyroid hormones.
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Tyrosine
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Leucine
• Concentric sphere
• Naturally occurring amino acid
• May see in liver disease along with tyrosine
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Leucine
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Cholesterol
• Rhomboid plate with notched corner
• Weakly birefringent
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Acetaminophen (Tylenol)
• Looks like Caplet
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Sulfa Drugs (Sulfonamides)
• Bacteriostatic
• Older drugs less soluble
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Bilirubin
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Bacteria
• Usually accompany increased leukocytes
• May be hidden within leukocytes
• Commonly Escherichia coli
• Reflex Culture and Sensitivity test
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Bacteriuria
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Yeast
• Budding and mycelial (pseudo-hyphae) forms
• Often seen in diabetics and immunocompromised patients
• Likely Candida albicans
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Trichomonads
• Flagellated protozoa from urethra
• Motility quickly decreases as specimen cools
• Trichomonas vaginalis is a type of STD
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Trichomonas vaginalis
QuickTime™ and aIntel Indeo® Video R3.2 decompressorare needed to see this picture.
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Schistosomiasis
• Only species seen in UA is Schistosoma hematobium that can deposit eggs in the bladder
• Common in Africa and SW Asia
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Schistoma hematobium
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Artifacts
• Sperm and corpora amylacea
• Starch and talc
• Fibers
• Oil droplets
• Air bubbles
• Glass fragments
• Plant cells
• Pollen
• Fecal contaminants
• Enterobius vermicularis (pinworm)
• Phthirus pubis (louse)
• Mite
• X-ray contrast media IVP
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Sperm
Corpora amylacea
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Talc
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Fibers
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Oil Droplets
Air Bubble
Glass Fragments
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Plant cell
Fecal Material
Pollen
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Enterobius vermicularis
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Pubic Louse
Mite
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IVP
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High Specific Gravity
• IVP and certain antibiotics may cause extremely high SG
• If SG >1.035 or 1.040 is not explained by glucosuria, etc., check history
• Dilution method• Make 1:1 dilution with d H2O• Read SG of diluted specimen• Multiply the decimal fraction by 2
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High Specific Gravity -- Example
• 1:1 diluted specimen = 1.025
• Double of 0.025 = 0.050
• Thus, undiluted specimen = 1.050
1.050 g/mL (original) + 1.000 g/mL(water) = 2.050 g/2mL
= 1.025 g/mL (diluted specimen)