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ASCP urinalysis and body fluids
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ASCP urinalysis and body fluids The clarity of a urine sample should be determined following thorough mixing of the specimen Milky urine from a 24 year old woman would most likely contain many white blood cells A brown-black urine would most likely contain: melanin The yellow color of urine i...

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  • October 26, 2024
  • 55
  • 2024/2025
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ASCP urinalysis and body fluids

The clarity of a urine sample should be determined following thorough mixing of the

specimen




Milky urine from a 24 year old woman would most likely contain many white blood cells




A brown-black urine would most likely contain: melanin




The yellow color of urine is primarily due to urochrome pigment




Red urine may be due to: myoglobin




A urine specimen collected on an apparently healthy 25-year-old man shortly after he finished

eating lunch was cloudy but showed normal results on multiple reagent test strip analysis. The

most likely cause of this turbidity is Phosphates




In what metabolic disease will urine turn dark brown to black upon standing Alkaptonuria

, ASCP urinalysis and body fluids
Urine osmolality is related to: specific gravity




Urine Specific Gravity is an index of the ability of the kidney to concentrate urine




Osmolality is a measure of dissolved particles, including ions




A patient urine sample has an increased protein and a high specific gravity. Which of the

following would be a more accurate measure of urine concentration osmolality




To prepare a solution appropriate for quality control of the refractometer the laboratory should

use Sodium chloride with a specific gravity 1.022




A urine's specific gravity is directly proportional to its: dissolved solids




Isosthenuria is associated with a specific gravity which is usually fixed around 1.010




the fluid leaving the glomerulus has a specific gravity of 1.010 (pH of 7.4)

, ASCP urinalysis and body fluids
A deficiency in arginine vasopressin (antidiuretic hormone) is associated with Low urine

specific gravity




When using a refractometer to measure urine concentration, the laboratory must correct for what

in their calculations Glucose




Calibration of refractometers is performed by measuring the specific gravity of distilled water

and Sodium chloride




The method of choice for performing a specific gravity measurement of urine following

administration of x-ray contrast dye is Reagent test strip




What urinary parameter is measured during the course of concentration and dilution tests to

assess renal tubular function Osmolality and specific gravity




Refractive index is a comparison of light velocity in air to light velocity in solutions




A patient has 2 separate urinalysis reports, which contain the following data

, ASCP urinalysis and body fluids
specific gravity A 1.004; B 1.017

pH A 5.5; B 7.0

protein A negative; B 1+

glucose A negative; B negative

blood A negative; B small

microscopy A rare epis; B 1-2 granular casts, 2-3 hyaline casts, moderate epis




Which of the following statements best explains these results a (protein, glucose and

microscopy of A are false negatives because of the specific gravity)




After receiving a 24-hour urine for quantitative total protein analysis, the laboratory must first

Measure the total volume




A falsely low result for urobilinogen May occur if the urine specimen is Exposed to light




What urine result is most likely to be affected by prolonged exposure to light Bilirubin




The following test results were obtained on a urine specimen at 8:00am

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