Chapter 51 & 52 HW#3_Assisting in the Clinical Laboratory & URINALYSIS Flashcards
(100 cards)
A centrifuge is used to separate:
solids from liquids. blood cells from serum or plasma. crystals from urine. *all of the above. Centrifugation is used to separate blood cells from serum, solid materials (e.g., cells and crystals) from urine, and solids from liquids.
An MSDS contains which of the following?
Trade and chemical names Hazardous ingredients Manufacturer’s name and address *All of the above The MSDS contains the basic information about a specific chemical or products, including the trade name, chemical name and synonyms, chemical family, manufacturer’s name and address, emergency telephone number, hazardous ingredients, physical data, fire and explosion data, and health hazard and protection information.
Pipettes used to deliver or transfer specified volumes of liquid to prepare reagents include which type(s)?
Graduated
Volumetric
*Both B and C
For most general laboratory procedures, two main types of manual pipettes are used, the volumetric pipette, which is used for transferring, and the graduated pipette, which is used for measuring. Serologic pipettes permit a fast flow of liquid with less accuracy and should not be used in the preparation of reagents.
Aerosolization in a centrifuge can be prevented by ensuring that:
Tubes to be centrifuged should be tightly capped to prevent the emission of aerosols.
Which of the following is a qualitative laboratory test result?
Fecal occult blood test: positive
For qualitative tests, no numeric value is attached to the result, which is reported simply as positive or negative.
In the identification system of the National Fire Protection Association, the white diamond indicates ______ of the chemical.
special hazards
The bottom diamond is white and provides special hazard information, including radioactivity, special biohazards, and other dangerous situations.
Which of the following is most accurate for measuring 500 mL?
500-mL volumetric flask
The most accurate measurement is obtained with a volumetric flask. Volumetric glassware must undergo rigorous calibration to ensure the accuracy of the measurement.
Decreased hemoglobin levels are seen in which of the following illnesses?
Iron deficiency anemia Hyperthyroidism Cirrhosis of the liver *All of the above A decrease in hemoglobin levels in RBCs is seen in iron deficiency anemia, hyperthyroidism, and cirrhosis of the liver.
The microscope component that directs the light up through the stage is the:
The condenser directs light up through the stage, and the iris diaphragm regulates the amount of light passing through the specimen.
The ocular of the microscope generally magnifies the image:
The usual magnification is ten times (10´).
Laboratory tests performed in a physician’s office are most likely to be categorized as:
waived.
moderate complexity.
*both a and b
Laboratory tests performed in a physician’s office are most likely to be waived and moderate-complexity tests.
You mix 2 mL of a patient’s serum with 18 mL of diluent to prepare a _____ dilution.
A 1:10 dilution can be prepared by mixing 2 mL of sample and 18 mL of diluent.
Immersion oil can be used with which of the following objective lenses of the microscope?
Oil immersion (100´) allows the finest focusing of the object and requires the use of a special oil, which is placed directly on the slide.
Which of the following is the most efficient method of preventing the spread of infection in a laboratory?
Washing or sanitizing the hands is the single most effective way to prevent the spread of all infections.
The act passed by Congress to establish quality standards for all laboratory testing is referred to as (the):
CLIA
The Clinical Laboratory Improvement Amendments (CLIA) established quality standards for all laboratory testing to ensure the accuracy, reliability, and timeliness of patients’ test results.
You are required to transfer 10 mL of urine from a 24-hour specimen into a special tube to be sent to a referral laboratory. You:
use a serologic pipette to transfer the urine into the tube.
Serologic pipettes are calibrated to their tip.
When the 40´ objective is in place on the microscope, the total magnification of the specimen is:
400´
The total magnification of the specimen being observed is determined by multiplying the magnification of the objective lens by 10.
Categories of tests performed in the clinical laboratory are assigned by the FDA on the basis of the:
potential risk to public health.
CLIA regulatory categories are based on their potential risk to public health.
Balancing a centrifuge requires that all tumbles in the load:
have a partner directly across in the rotor holder.
Balancing a centrifuge requires that tubes of equal size and containing equal volume are positioned directly across from one another in the rotor holders.
A blood culture and sensitivity (C&S) test is most likely to be performed in which division of the clinical laboratory?
Microbiology
Blood cultures are performed in the microbiology laboratory.
__________ is the study of bacteria, fungi, yeasts, parasites, and viruses.
Microbiology is the study of microorganisms that cause disease.
A portion of a well-mixed sample that is removed for testing is called a(n):
A portion of a well-mixed sample that is removed for testing is called a(n):
The aliquot is the part of the sample that is removed for the laboratory test.
The pledge of healthcare professionals to work to achieve the highest degree of excellence in the care given to every patient is otherwise known as:
quality assurance (QA). QA is the pledge of healthcare professionals to work to achieve the highest degree of excellence in the healthcare given every patient. QA encompasses a comprehensive set of policies and procedures developed to ensure the reliability of laboratory testing.
An autoclave can best be compared with a(n):
pressure cooker.
An autoclave sterilizes instruments through the use of steam under pressure, which is similar to the way food cooks in a pressure cooker.
