Mixed Deck — All CLS Topics Flashcards
100 cards from real CLS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 20 Mixed Deck — All CLS Topics flashcards as text
What is the role of corrective action in quality assurance?
Answer: To fix issues and prevent them from happening again
Corrective action is a critical component of quality assurance, involving the investigation and resolution of identified non-conformities or errors. Its purpose is not only to fix the immediate problem but also to identify the root cause and implement measures to prevent its recurrence. This systematic approach continuously improves laboratory processes, enhances patient safety, and maintains high standards of quality.
What is the foundational principle of applied methods and techniques in the Certified Laboratory Professional field?
Answer: Maintaining competence, integrity, and service to stakeholders
The foundational principles of applied methods and techniques in Certified Laboratory Professional center on maintaining competence, integrity, and quality service.
What quality assurance measure supports assessment and evaluation?
Answer: Regular self-assessment, peer review, and adherence to established standards
Ongoing quality assurance through self-assessment, peer review, and standards adherence ensures continuous improvement.
What type of environment should be maintained in microbiology testing areas?
Answer: Sterile and controlled
Maintaining a sterile and controlled environment in microbiology testing areas is paramount to prevent contamination. This minimizes the introduction of unwanted microorganisms from the air, surfaces, or personnel, which could interfere with test results or compromise cultures. A controlled environment ensures the integrity of experiments and the accuracy of microbial identification and susceptibility testing.
Which instrument is commonly used to separate blood components?
Answer: Centrifuge
A centrifuge is a laboratory instrument that uses centrifugal force to separate components of a fluid, such as blood, based on their density. By spinning samples at high speeds, it causes heavier components (like red blood cells) to settle at the bottom, while lighter components (like plasma) remain at the top. This separation is crucial for various diagnostic tests.
Which stain is routinely used to identify malaria parasites on a peripheral blood smear?
Answer: Wright-Giemsa stain
Wright-Giemsa stain is the standard stain for peripheral blood smear examination, including identification of intraerythrocytic malaria parasites.
How should applied methods and techniques knowledge be maintained and updated?
Answer: Through continuous professional development, current literature review, and professional networking
Professional competence requires ongoing development through education, literature review, and engagement with the professional community.
Which technique is commonly used for protein separation?
Answer: Electrophoresis
Electrophoresis is a fundamental laboratory technique used to separate macromolecules, such as proteins and nucleic acids, based on their size and electrical charge. When an electric field is applied, these molecules migrate through a gel matrix at different rates. This separation allows for the identification, purification, and analysis of individual protein components within a complex mixture.
Why are proficiency testing programs important?
Answer: They help verify lab accuracy by external comparison
Proficiency testing (PT) programs are crucial for verifying a laboratory's accuracy by external comparison. In these programs, external agencies send unknown samples to participating labs for analysis, and the results are compared to those of other labs and the true value. This objective assessment helps identify areas for improvement, ensures consistent quality across different facilities, and demonstrates compliance with regulatory requirements.
What quality assurance measure supports core concepts and principles?
Answer: Regular self-assessment, peer review, and adherence to established standards
Ongoing quality assurance through self-assessment, peer review, and standards adherence ensures continuous improvement.
A patient has elevated AST and ALT with a De Ritis ratio (AST/ALT) greater than 2:1. This pattern is most consistent with which condition?
Answer: Alcoholic liver disease
An AST/ALT ratio greater than 2:1 is characteristic of alcoholic liver disease because alcohol and its metabolites selectively damage mitochondria, elevating AST disproportionately.
Which antibody class is the FIRST produced during a primary immune response?
Answer: IgM
IgM is the first antibody class produced during a primary immune response; its pentameric structure makes it highly effective at agglutination and complement activation.
Which test is used as the CONFIRMATORY test for HIV after a positive 4th-generation ELISA/immunoassay screen?
Answer: Western blot / HIV-1/2 differentiation immunoassay
An HIV-1/2 differentiation immunoassay (formerly Western blot) confirms HIV infection by detecting antibodies to specific HIV proteins after a reactive screen.
What is the purpose of an MSDS (Material Safety Data Sheet)?
Answer: To provide safety info for chemicals
An MSDS (Material Safety Data Sheet), now often referred to as an SDS (Safety Data Sheet), is a comprehensive document that provides detailed information about hazardous chemicals. It includes data on physical and chemical properties, health hazards, first-aid measures, safe handling and storage, spill procedures, and protective equipment. MSDSs are essential resources for ensuring chemical safety, proper emergency response, and compliance with regulations in the laboratory.
What ethical standard governs applied methods and techniques practice?
Answer: Adherence to the profession's code of ethics and applicable laws and regulations
Professional ethics codes and applicable laws provide the framework for ethical practice in every professional field.
In the Kirby-Bauer disk diffusion method for antibiotic susceptibility testing, what parameter is measured?
Answer: Diameter of the zone of inhibition around the antibiotic disk
The Kirby-Bauer method measures the diameter of the clear zone of inhibition around antibiotic-impregnated disks placed on a lawn of bacteria on Mueller-Hinton agar.
What technology is used in immunoassays to detect antibodies or antigens?
Answer: ELISA
ELISA, which stands for Enzyme-Linked Immunosorbent Assay, is a widely used immunoassay technique. It employs antibodies and enzyme-linked detection systems to identify and quantify specific antigens or antibodies in a sample. This method is highly sensitive and specific, making it invaluable for diagnosing infectious diseases, detecting hormones, and screening for certain cancers.
How should safety and compliance knowledge be maintained and updated?
Answer: Through continuous professional development, current literature review, and professional networking
Professional competence requires ongoing development through education, literature review, and engagement with the professional community.
What is the purpose of using a control sample in testing?
Answer: To ensure accuracy and reliability
Control samples are known materials with expected results, run alongside patient samples to verify the accuracy and reliability of the testing system. By comparing the control's observed results to its known values, laboratories can confirm that reagents, equipment, and techniques are performing correctly. This ensures that the patient results generated are trustworthy and valid for diagnostic purposes.
What is the foundational principle of industry best practices in the Certified Laboratory Professional field?
Answer: Maintaining competence, integrity, and service to stakeholders
The foundational principles of industry best practices in Certified Laboratory Professional center on maintaining competence, integrity, and quality service.