Measurement of Catecholamines Precautions Quiz
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Questions and Answers

What is one precaution mentioned for ensuring accurate measurement of catecholamines?

  • Urine samples should be exposed to sunlight for better results
  • Use of antioxidants like glutathione can lower catecholamine values
  • Placing urine samples in clear containers is recommended
  • Prolonged exposure to platelets may increase catecholamine values (correct)
  • What is the recommended patient position prior to collecting samples for catecholamine testing?

  • Sitting
  • Standing
  • Lying down for 15 to 30 minutes (correct)
  • Walking around
  • Which food items should be restricted prior to the collection of urine samples for catecholamine testing?

  • Citrus fruits, vanilla, coffee (correct)
  • Bananas, chocolates, tea
  • Bread, rice, vegetables
  • Cocoa, coffee, milk
  • In which position do norepinephrine levels increase markedly according to the text?

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

    Which hormone is the major intact catecholamine in urine?

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

    Why is the measurement of urine metanephrines considered the assay of choice for Pheochromocytoma?

    <p>Catecholamines are easily degraded in the circulation</p> Signup and view all the answers

    What can be used as a marker to follow the response of patients with adrenal medullary insufficiency to treatment?

    <p>Chromogranin A protein levels</p> Signup and view all the answers

    In which conditions are increased norepinephrine and dopamine but not epinephrine seen?

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

    What is the primary reason for using antioxidants when collecting urine samples for catecholamine testing?

    <p>To stabilize catecholamines and prevent their breakdown</p> Signup and view all the answers

    What restrictions should be followed in terms of food intake prior to collecting urine samples for catecholamine testing?

    <p>Avoid foods high in tyrosine</p> Signup and view all the answers

    Why is it important to measure norepinephrine levels in different positions?

    <p>To differentiate between normal and pathological catecholamine levels</p> Signup and view all the answers

    How does stress impact catecholamine values in the body?

    <p>Stress triggers the release of catecholamines, increasing their levels</p> Signup and view all the answers

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