Lab Tests and Procedures

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What is the normal color of urine?

Brown
Colorless
Yellow (correct)
Clear

What is the purpose of measuring the specific gravity of urine?

To indicate if the urine is normal, diluted, or concentrated (correct)
To detect the presence of microorganisms in urine
To determine the pH of urine
To measure the volume of urine

What is the primary purpose of a reagent strip?

To determine the pH of urine
To measure the osmolality of urine
To analyze the chemical composition of urine
To detect the presence of microorganisms in urine (correct)

How long does it take to read the result of a reagent strip?

30 seconds (C) Signup and view all the answers

What is measured using a urinometer?

The specific gravity of urine (A) Signup and view all the answers

How are the results of a reagent strip typically reported?

As negative, trace, 1+, 2+, 3+, or 4+ (B) Signup and view all the answers

What is the most common urinalysis test ordered?

Routine Urinalysis (UA) (D) Signup and view all the answers

Who collects throat swab specimens?

Physician (D) Signup and view all the answers

What should be observed when handling specimens?

Standard precautions (A) Signup and view all the answers

Where should the label be placed on the specimen container?

On the container, not on the lid (C) Signup and view all the answers

What information should be included on the specimen label?

Name, date and time of collection, and type/source of specimen (A) Signup and view all the answers

What is the primary purpose of the C-Urea Breath Test?

To detect Helicobacter pylori infection (D) Signup and view all the answers

What is the role of urease in Helicobacter pylori infection?

It hydrolyzes urea into ammonia and CO2 (D) Signup and view all the answers

What is the purpose of the baseline breath sample in the C-Urea Breath Test?

To provide a comparison for subsequent breath samples (D) Signup and view all the answers

What is the function of the labeled 13C urea in the C-Urea Breath Test?

To label CO2 produced from urea hydrolysis (D) Signup and view all the answers

How often is the patient asked to blow into the Mylar balloon during the C-Urea Breath Test?

At specified intervals (D) Signup and view all the answers

What is the purpose of using EDTA tubes in collecting peritoneal fluid?

To perform cell counts and smears (C) Signup and view all the answers

What is the primary indication for collecting sputum?

To diagnose or monitor lower respiratory tract infections (D) Signup and view all the answers

Why is it important to rinse the mouth with water before collecting sputum?

To reduce the risk of contamination (C) Signup and view all the answers

What is the minimum volume of sputum required for laboratory testing?

3-5 mL (D) Signup and view all the answers

What type of tube is used for culturing microorganisms from peritoneal fluid?

Sterile heparinized tube (B) Signup and view all the answers

How should the sputum sample be transported to the laboratory?

At room temperature (B) Signup and view all the answers

What is the purpose of centrifuging 10-15 mL of urine in microscopic analysis?

To examine the urine under the microscope (A) Signup and view all the answers

Why is midstream urine collection recommended?

To prevent contamination with genital secretions and bacteria (C) Signup and view all the answers

What is the purpose of measuring specific gravity or creatinine in urine drug screening?

To determine if the specimen is diluted (D) Signup and view all the answers