18 Questions
Which blood constituents are mentioned to show diurnal variation in the passage?
Fe and GH
Which factor can affect the level of serum triacylglycerols according to the passage?
Diet composition
What is one impact of posture on blood samples according to the passage?
Significant differences in protein concentration
Which physiological state is specifically mentioned regarding natural fluctuations in pituitary and ovarian hormones in the passage?
Menstrual cycle
In which situation would variations in blood sample collection due to venostasis occur?
When drawing blood from a patient in recumbent position
What is the purpose of point of care testing (POCT)?
To perform tests in remote locations like intensive care units
In the laboratory testing cycle, what does the preanalytical phase involve?
Specimen collection and transportation to the laboratory
What percentage of factors negatively affect the quality and accuracy of laboratory results according to the text?
45-60%
What is a key advantage of point of care testing (POCT) compared to traditional testing methods?
Eliminates the need for sample transportation to the laboratory
Which phase of the laboratory testing cycle begins when a healthcare professional decides to order a lab test?
Preanalytical phase
What does the preanalytical phase of the laboratory testing cycle NOT include?
Final test result interpretation
What type of anemia is caused by folic acid deficiency?
Macrocytic anemia
Which test is used to diagnose vitamin B12 deficiency?
Schilling test
What type of anemia results from iron deficiency?
Microcytic anemia
Which component of the Complete Blood Count (CBC) is most useful in determining different types of anemia?
MCV
In which physiological state is folic acid supplementation crucial to prevent a specific condition?
Pregnancy
Which test is used to diagnose iron deficiency?
Serum iron levels
What type of immunity is mediated by T lymphocytes?
Cell-mediated immunity
Learn about how to calculate Specificity in diagnostic testing using the formula: SP = TN/ (TN+FP) × 100%. Understand the trade-off between sensitivity and specificity in tests and how to optimize them based on the purpose of the test.
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