Lab CE Quiz 2- chem 151

Which statement refers to the coefficient of variation? A.)A measure of imprecision that is expressed as a percentage. B.)The average of the data points. C.)The distribution of the control results around the central point. D.)The value with the highest frequency within the data set.

A.) A measure of imprecision that is expressed as a percentage.

Which of the following body fluids is considered most unlikely to transmit a bloodborne pathogen such as hepatitis B virus or hepatitis C virus? A.)Semen or vaginal secretions B.)Blood C.)Sweat D.)Body cavity fluids (e.g. peritoneal or pleural fluids)

C.)Sweat

Personal protective equipment is used to decrease the risk of exposure to bloodborne pathogens for the phlebotomist. When should the phlebotomist use gloves for venipuncture? A.)Only when the patient is in isolation. B.)Only when being observed during an inspection. C.)With every venipuncture. D.)Only when training a new phlebotomist.

C.)With every venipuncture.

What plan or protocol must a laboratory have to protect employees from the health hazards of hazardous chemicals used in the workplace?

Chemical hygiene plan

A safety inspector asks you what class of fire extinguisher is acceptable for use on an electrical fire when the circuit is energized?

Class C

What percentage solution of sodium hypochlorite (bleach) is recommended as a routine laboratory disinfectant?

10%

What is a lyophilized control?

A control that is dehydrated to powder.

What is indicated by the number 3 in the BLUE section of the NFPA diamond?

A potentially dangerous health hazard that can be associated with the chemical with continued exposure

Which of the following items must be labeled with a biohazard label or be colored red or orange to indicate it is a biohazard? A.)A container that is used for disposal of needles in the blood collection area. B.)A tube of blood that is placed into a biohazard bag for transport. C.)A unit of blood that will be used for transfusion. D.)A bottle of breast milk to be discarded from the refrigerator in the NICU.

A.)A container that is used for disposal of needles in the blood collection area.

All of the following would result in a rejection of an analytical run under the Westgard rules, EXCEPT: A.) One control observation exceeding the mean by 2.5 SD. B.)One control observation exceeding the mean by 3.5 SD. C.)Two consecutive control observations, one exceeding the mean by +2.5 SD, and the other by -2.5 SD. D.)Ten consecutive control observations are all less than the mean.

A.)One control observation exceeding the mean by 2.5 SD.

Which one of the following answer choices is correct when collecting capillary blood specimens for routine laboratory tests? A.)The first drop of blood at the puncture site should be wiped away. B.)Puncture the site at the end of the fingertip. C.)Apply firm pressure to the site. D.)Discard used lancet into a biohazard bag.

A.)The first drop of blood at the puncture site should be wiped away.

A standard is used to check the __________ of a method or instrument.

Accuracy

Standard precautions means that:

All specimens must be handled as if they are hazardous and infectious

All of the following statements about using bar-coded labels on specimens are true, EXCEPT? A.)Labeling errors are decreased. B.)All possibility of errors is eliminated. C.)Keyless data entry is facilitated. D.)Documentation is standardized.

B.)All possibility of errors is eliminated.

All of the following agencies directly regulate clinical laboratories, EXCEPT: A.) Centers for Medicare and Medicaid Services B.)Chemical Safety Board C.)College of American Pathologists D.)Joint Commission

B.)Chemical Safety Board

Which of the following are considered engineering controls? A.)Lab coat B.)Sharps disposal container C.)Gloves D.)Face shield

B.)Sharps disposal container

Which one statement about Standard Precautions is most correct? A.)Standard Precautions means to treat all patients as if they were infectious. B.)Standard Precautions means to treat blood, all body fluids, all secretions, all excretions, non-intact skin, and mucous membranes as if they were infectious. C.)Standard Precautions do not apply to feces or urine. D.)Standard Precautions do not apply to pleural fluid or semen.

B.)Standard Precautions means to treat blood, all body fluids, all secretions, all excretions, non-intact skin, and mucous membranes as if they were infectious.

Which section of the SDS would provide information on chemical hazards that might affect your health: A.) Physical and chemical properties section B.)Toxicological information section C.)Stability and reactivity section D.)Hazardous ingredients data

B.)Toxicological information section

What biosafety level (BSL) is required by the Centers for Disease Control and Prevention (CDC) for working with Mycobacterium tuberculosis if there is a possibility that aerosols might be released?

BSL-3

Each day, laboratorians must evaluate the quality of samples submitted to the laboratory for analysis, specifically to help prevent pre-analytical errors. Based on the photograph to the right, match the tubes with letters to their correct corresponding descriptions below. A.)A-hemolyzed B-lipemic C-icteric D-normal B.)A-normal B-hemolyzed C-icteric D-hemolyzed C.)A-lipemic B-icteric C-normal D-hemolyzed D.)A-lipemic B-hemolyzed C-normal D-icteric

C.)A-lipemic B-hemolyzed C-normal D-icteric

All of the following are common ways that bloodborne pathogens are transmitted, EXCEPT? A.)Sexual contact B.)Drug users sharing needles C.)Airborne particles in schools and offices D.)An infant's exposure to its mother's body fluids

C.)Airborne particles in schools and offices

Which clinical laboratory regulation defines the personnel qualifications and responsibilities of the various positions in the clinical laboratory? A.)AMT B.)OSHA C.)CLIA D.)CLMA

C.)CLIA

Which of these procedures should be followed when collecting blood specimens for laboratory testing? A.)Shake the tube vigorously after collecting the specimen. B.)Refrain from inverting blood collection tubes after collecting the specimen. C.)Ensure that blood collection tubes containing anticoagulants are adequately filled. D.)Ensure that all collection tubes are no more than half-filled with blood.

C.)Ensure that blood collection tubes containing anticoagulants are adequately filled.

Health care workers who enter airborne infection isolation rooms should use a N95 disposable mask, as shown on the right. All of the following are required for N95 mask use EXCEPT? A.)Men must shave their facial hair for a tight fight B.)Be fit-tested C.)Have a tuberculin skin test D.)Receive medical clearance

C.)Have a tuberculin skin test

Which occurrence is a medical error? A.)Technologist drops and breaks a bottle of chemistry reagent B.)Patient is tested and diagnosed with acute leukemia C.)Analyzer malfunctions and test results are rejected as invalid D.)Incompatible blood is transfused into a patient during surgery

D.)Incompatible blood is transfused into a patient during surgery

The risk of laboratory-acquired infections with viruses, such as HIV-1, is a critical consideration. All of the following routes are considered modes of transmission with infected blood or other body fluids, EXCEPT? A.)Contact of the hand (non-intact skin) B.)Contact with eyes C.)Contact with mouth D.)Inhalation (airborne transmission)

D.)Inhalation (airborne transmission)

Which of the following properly describes the use of needles? A.)Recap all needles. B.)Place contaminated needles in trash containers as soon as possible after use. C.)Break off needle tips when possible. D.)Needle safety devices should always be used.

D.)Needle safety devices should always be used.

Which statement is associated with random error? A.)Affects all samples B.)May produce a "bias" in the method C.)Related to the accuracy of the method D.)Occurs solely by chance

D.)Occurs solely by chance

Which of the following member of the healthcare team is authorized to perform a waived test? A.)Registered nurse (RN) and medical assistant only B.)Phlebotomist and RN only C.)Medical assistant and phlebotomist only D.)RN, phlebotomist, and medical assistant can all perform waived tests

D.)RN, phlebotomist, and medical assistant can all perform waived tests

Which of the following are considered engineering controls? A.)Face shield B.)Gloves C.)Lab coat D.)Self-sheathing needles

D.)Self-sheathing needles

All of the following pose a significant risk of transmitting bloodborne pathogens, EXCEPT? A.)Bloody urine B.)Semen C.)Pleural fluids D.)Sweat

D.)Sweat

What is the MOST environmentally acceptable method for disposal of most chemical waste products? A.)Any method is accepted as they are never mandated by most local municipal authorities B.)Dispose to a sewer system that connects to a major waterway for dilution C.)Incinerate at a waste dump just outside of town to avoid toxic fumes D.)The method listed in the appropriate Safety Data Sheet (SDS)

D.)The method listed in the appropriate Safety Data Sheet (SDS)

All of the following are examples of preanalytic errors, EXCEPT: A.)Misidentified patient B.)Underfilled tube C.)Prolonged tourniquet application D.)Wrong test performed

D.)Wrong test performed

It is important for laboratory employees to complete and properly file all forms used to add tests, cancel tests, and other compliance policy forms because of all of the following reasons, EXCEPT: A.)It is mandated as part of the compliance policy and must be adhered to at all times. B.)Ensures the laboratory can document its activities. C.)In case of an audit, if the documents or records cannot be found, the government assumes the compliance program is not being followed. D.)Your supervisor wants to keep you busy at all times and needs to find more work for you.

D.)Your supervisor wants to keep you busy at all times and needs to find more work for you.

Which of the following is a drawback of point-of-care testing (POCT)?

Decreased precision in data

A laboratory labels its secondary containers of hazardous chemicals using a color-coded system, with a different color representing each different type of hazard. The coding system follows the hazard identification system used by the National Fire Protection Agency. What hazard would be represented by the red section on the hazard label?

Fire hazard

Any health care worker who is expected to have contact with patient blood potentially infectious body fluids must be offered a vaccination for:

Hepatitis B

What does the acronym PASS in laboratory safety refer to?

How to use a fire extinguisher

Facial masks should be worn in the laboratory:

If mucous membrane contact is anticipated.

Computer passwords for laboratory computers should be:

Kept confidential

The agency of the Federal Government responsible for the development of the workplace safety guidelines is:

OSHA

The Health Insurance Portability and Accountability Act (HIPAA) Privacy Regulations apply to which type of patient health information?

Paper, electronic, and oral forms

Critical values not reported or not reported in a timely manner is an example of a laboratory error made during which phase of laboratory testing?

Postanalytic

The majority of all laboratory errors occur during which phase of laboratory testing?

Preanalytic

The greatest source of error in point of care testing is:

Preanalytical error

"After repeated analysis, the same result is achieved" describes which of the following quality terms?

Precision

What is the Health Insurance Portability and Accountability Act (HIPPA) requirement?

Protect the confidentiality of patient information.

Which color(s) are associated with biohazardous containers?

Red and orange

A slow, progressive drift of values away from the mean is called a:

Trend

Does the Levey-Jennings chart to the right show acceptable quality control results?

Yes