Types of Errors and Blood Specimens in Collection Processing
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Questions and Answers

What does the term 'basal state' refer to?

  • The state of the body during intense physical activity
  • The state of the body under the influence of sedatives
  • The state of the body after a heavy meal
  • The metabolic state of the body early in the morning after fasting for approximately 12 hours (correct)

    • How does serum differ from other body fluids in terms of viscosity?

  • It has varying viscosity based on diet and exercise
  • It has similar viscosity to other body fluids
  • It has lower viscosity due to the absence of fibrinogen (correct)
  • It has higher viscosity due to the presence of fibrinogen

    • What is the primary advantage of using serum for analysis of some abundant components?

  • Enhanced cellular content for better results
  • Reduced specimen delivery
  • Decreased precipitates formed during freezing and thawing (correct)
  • Increased viscosity for precise analysis

    • Why should specimens for determining the concentration of body constituents be collected when the patient is in a basal state?

    <p>To minimize or eliminate effects of diet, exercise, and other factors on test results</p> Signup and view all the answers

    What does hemoconcentration refer to?

    <p>A decrease in blood fluid content resulting in increased blood constituent concentration</p> Signup and view all the answers

    Which factor contributes to hemoconcentration after a tourniquet is released?

    <p>Water loss from capillaries due to increased pressure</p> Signup and view all the answers

    What is the benefit of using cerebrospinal fluid (CSF) over serum in terms of yield?

    <p>15-30% higher yield compared to serum</p> Signup and view all the answers

    Why should the laboratorian verify that a sample designated for clinical chemistry analysis is not shared among several departments?

    <p>To prevent invalidating certain tests in different areas</p> Signup and view all the answers

    For which purpose is creatinine analysis often used in the clinical chemistry lab?

    <p>To assess the completeness of a 24-hour urine sample</p> Signup and view all the answers

    What makes urine specimens advantageous for creatinine clearance and urine protein determination?

    <p>Stability and low interference of creatinine output</p> Signup and view all the answers

    Why is time-saving an advantage of using cerebrospinal fluid (CSF) compared to serum?

    <p>No clotting process required</p> Signup and view all the answers

    What characteristic of urine makes it a challenging specimen to collect for quantitative analyses?

    <p>Difficulty in ensuring complete sample collection within specified time</p> Signup and view all the answers

    What type of errors are made during the testing process?

    <p>Analytical errors</p> Signup and view all the answers

    Which blood sample type has a higher glucose concentration compared to venous blood?

    <p>Capillary blood samples</p> Signup and view all the answers

    What is the specimen of choice for most routine lab tests?

    <p>Plasma</p> Signup and view all the answers

    Which component of blood contains about 55% of plasma?

    <p>Water</p> Signup and view all the answers

    What does serum lack compared to plasma?

    <p>Clotting factors like Factor I</p> Signup and view all the answers

    Why is arterial blood collection known for its difficulty and hazards?

    <p>It involves inherent arterial pressure</p> Signup and view all the answers

    Which blood sample type has the highest oxygen content?

    <p>Arterial blood samples</p> Signup and view all the answers

    What is the main disadvantage of using arterial blood samples for routine tests?

    <p>Potential complications and pain</p> Signup and view all the answers

    What distinguishes capillary blood from venous blood in terms of its composition?

    <p>Different protein concentrations in capillary blood</p> Signup and view all the answers

    Why is plasma the preferred specimen for most routine lab tests?

    <p>It provides immediate testing ability without waiting for clotting</p> Signup and view all the answers

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