30 Questions
What is the approximate percentage of water in urine?
95%
What is the primary factor that determines urine volume?
The amount of water that the kidneys excrete
What is the normal range of daily urine output?
600-2000 mL
Why is it important to wear gloves when handling urine specimens?
To reduce the risk of infection
What information should be included on the label of a urine specimen?
Patient's name, identification number, date and time of collection, and additional information as required
What should accompany specimens delivered to the laboratory?
A requisition form
What is the recommended capacity of the container for specimen collection?
50mL
What is the primary concern for delivering specimens to the laboratory?
Delivering the specimen within 2 hours
What is the most commonly used method of preservation for specimens?
Refrigeration
What should be done with a specimen that cannot be delivered and tested within 2 hours?
Refrigerate the specimen
Why are disposable containers recommended for specimen collection?
They reduce the risk of contamination
What is the primary reason for rejecting a specimen?
The specimen is contaminated with feces or toilet paper
What is the term used to describe the transparency or turbidity of a urine specimen?
Clarity
What is the characteristic of the odor of freshly voided urine?
Faint and aromatic
What is the purpose of using a clear container to view a urine specimen?
To evaluate the clarity of the urine
What is the reason for storing reagent strips with a desiccant?
To prevent moisture from affecting the strips
What is the typical temperature range for storing reagent strips?
Below 30 degrees Celsius
What is the result of a color-producing chemical reaction on a reagent strip?
A change in the color of the urine
What is the pigment responsible for the yellow color of urine?
Urochrome
Why is it important to examine the urine specimen under a good light source?
To accurately determine the color of the urine
What is the normal color range of urine?
Pale yellow to amber
What is the possible cause of yellow-orange colored urine?
Administration of phenazopyridine or azo-gantrisin compounds
What is the possible cause of brown or black urine?
Presence of melanin or homogentisic acid
What is the possible cause of blue or green colored urine?
Bacterial infections, including Pseudomonas species
What is the method of interpreting the reactions in urine analysis?
By comparing the color produced on the pad with a chart supplied by the manufacturer
What is the purpose of checking pH levels in urine analysis?
To aid in determining the existence of systemic acid-base disorders
What is a common indicator of renal disease in urine analysis?
Abnormal protein levels
What is a precaution to be taken when using reagent strips?
Remove the strips immediately prior to use
How often should reagent strips be checked with positive and negative controls?
At least once every 24 hours
What should you do if the chemical pads become discolored?
Do not use the pads
Learn about the composition of urine, including the percentage of water and solutes, and the factors that influence urine volume. Test your knowledge of urine output and the role of antidiuretic hormone.
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