RADT_150_Unit_5_Exam

RADT_150_Unit_5_Exam - RADT 150 Patient Care in Radiography...

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Unformatted text preview: RADT 150 Patient Care in Radiography II Unit 5 Exam Classification, Chemistry, and Pharmacology of Contrast Agents 2 5.0 Classification, Chemistry and Pharmacology of Contrast Agents Directions: 1. Write your name and the date on your Scantron form. Identify the subject as the course number (for example, RADT 101) along with the test number (for example, Unit 1). 2. For each of the questions below, select the best answer to the question. 3. Using a No. 2 pencil, fill in the appropriate answer on the answer sheet. 4. Erase unwanted answers completely. Questions with two or more filled in answer spaces are graded as incorrect. 5. Answer all questions. 6. You have a maximum 15 minutes to complete the following 25 questions. (Note this time factor approximates the amount of time you would be allowed to answer the same number of questions on the Registry examination in radiography) 1. Which of the following are low-contrast tissues? A. B. C. D. 2. Skin, kidneys, stomach, & biliary tree Biliary tree, kidneys, vasculature, & GI tract Kidneys, gal bladder, small intestine & spleen Veins and arteries Which of the following are commonly prescribed radiopaque contrast media (ROCM)? A. B. C. D. Iodine & Barium Sodium & Iodine Barium & Sodium Barium only 3 3. Why are iodine and barium commonly used for contrast? A. B. C. D. 4. The atomic numbers are low The mass density is low The atomic numbers are low and the mass density is high. The atomic numbers and mass density are high Which of the following are available contrast medias? 1. 2. 3. 4. A. B. C. D. 5. Parental / enteral High osmolarity / low osmolarity Ionic / nonionic High osmolality / low osmolality 1 only All of the above 1, 2 & 3 1, 3 & 4 Which of the following is a function of iodine molecules in contrast media? A. B. C. D. 6. photon absorbers electron absorbers proton absorbers neutron absorbers Osmosis A. B. C. E. 7. Effective Effective Effective Effective The movement The movement The movement membrane. The movement of water across a membrane of molecules across each other of water across a semipermeable of water and contrast media. Osmolality A. B. C. D. Concentration Concentration Concentration Concentration of of of of molecules per liter of water solution per weight of molecule molecules per volume of solution molecules per weight of water 4 8. Osmolarity A. B. C. D. 9. C. E. volume of solution weight of water weight of a molecule kilogram of solution Alters the vascular structure itself Alters the attenuation of x-rays passing through the area. Alters the image by adding fog to the film Washes out the image on the radiographic film Low-osmolality ionic ROCM High-osmolality ionic ROCM Low-osmolality nonionic ROCM All of the above Positively charged particle Positively charged electron Negatively charged particle Negatively charged electron Cation A. B. C. D. 13. per per per per Anion A. B. C. D. 12. molecules molecules molecules molecules Which of the following are categories of intravascular ROCM? A. B. C. D. 11. of of of of How does increased density to vascular structures enhance the image? A. B. 10. Concentration Concentration Concentration Concentration Positively charged particle Neutrally charged particle Negatively charged particle Negatively charged electron Which of the following is a high-osmolality ionic intravascular radiopaque contrast media? A. B. C. D. Loxaglate meglumine Diatrizoate meglumine Loxaglate sodium Diatrizoate sodium 5 14. Which of the following is a low-osmolality ionic intravascular radiopaque contrast media? A. B. C. E. 15. Which of the following best describes the consistency of intravascular ROCM? A. B. C. D. 16. 15 to 30 minutes 45 minutes to an hour Immediately after injection 24 hours How soon is the brain visible after injection? A. B. C. D. 19. Small and large intestine Brain Veins and arteries Urinary tract How soon is the urinary tract visible after injection? A. B. C. D. 18. Small molecules with poor lipid solubility Small molecules with adequate lipid solubility Large molecules with fair lipid solubility Large molecules with poor lipid solubility Which of the following areas provide immediate contrastenhanced visibility? A. B. C. D. 17. Loxaglate meglumine Diatrizoate meglumine Iothalamate meglumine Diatrizoate sodium Immediately after injection Up to 40 minutes 15 to 30 minutes 24 hours When is enteral ROCM used? A. B. C. D. Diagnose Diagnose Diagnose system Diagnose and evaluate disorders of the brain and evaluate disorders of the urinary tract and evaluate disorders of the gastrointestinal and evaluate disorders of the spinal column 6 20. Which of the following is not a method of enteral ROCM’s? A. B. C. D. 21. Which of the following solutions are used for oral and rectal administration? A. B. C. D. 22. Used for oral administration only Used for rectal administration only Aids in the diagnosis of GI tract disorders Aids in the diagnosis of brain disorders Why is barium sulfate the preferred GI ROCM? A. B. C. D. 25. 90 minutes 15 to 30 minutes Immediately 24 hours Which is true of barium sulfate? A. B. C. D. 24. Diatrizoate meglumine Diatrizoate sodium A only Both A & B What is the length of time for radiodensity to occur after oral administration the esophagus and stomach? A. B. C. D. 23. Non aqueous solutions Suspensions Tablets Aqueous solutions Provides more thorough visualization of structures It is comfortable for the patient The doctors prefer it over the others Provides limited visualization of structures Locetamic acid (cholebrine) A. B. C. D. Rectal ROCM used for opacifying the gallbladder Oral ROCM used for opacifying the gallbladder Rectal ROCM used for opacifying the heart Oral ROCM used for opacifying the heart ...
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