Mosby's CT Registry Review 3rd Edition Practice Exam 1 Questions and Answers 2024

1. An average range for activated partial thromboplastin time (PTT) is:: 25-35 seconds. PTT is a lab measure of blood coagulation. 2. What is the correct angle of insertion for placing a butterfly needle into a vein for intravenous administration of a contrast agent?: 15 degrees It's also important that the vein be properly stabilized and needle be inserted gently with bevel facing upward. 3. A total volume of 125 mL of an iodinated contrast agent is administered intravenously via automatic injector in 50 seconds.The flow rate for this injection is:: 2.5 mL/sec Flow rate may be calculated by dividing total contrast volume by time of injection. 4. The condition whereby the pt suffers from a low concentration of oxygen in the blood is called:: hypoxemia 5. While one is obtaining a thorough history from a pt before the intravenous injection of an iodinated contrast material, which of the following topics should be included? 1. any prior allergic reactions to CM 2. presence of HIV or hepatitis infection 3. hx of asthma: 1 and 3 only. 6. Which of the following factors may affect a pt's calculated GFR? 1. age 2. sex 3. race: 1, 2, and 3 7. Which of the following IV contrast agent administration methods provides the greatest overall plasma iodine concentration? a. drip infusion b. bolus technique c. biphasic technique d. CT portography: bolus technique A bolus admin. of contrast agent requires entire vol of material to be injected over the shortest possible time. Bolus admin provides the maximum plasma iodine concentration and subsequent tissue enhancement. 8. A patient in shock may exhibit which of the following sx? 1. tachycardia 2. rapid, shallow breathing 3. cyanosis: 1, 2, and 3 Other sx include pallor, hypotension, and cold, clammy skin 9. The drug SOLU-CORTEF may be classified as which of the following? a. anticholinergic b. bronchodilator c. antihistamine d. corticosteroid: corticosteroid SOLU-CORTEF is a brand name for hydrocortisone. Corticosteroids may be used during tx of anaphylactoid reactions to iodinated CM. 10. Which of the following is a nonionic contrast material? a. iodamide b. iothalamate c. iohexol d. diatrizoate: iohexol Nonionic CM include iopamidol (Isovue), iohexol (Omnipaque), and iopromide (Ul- travist). 11. What term is used to describe a pt who is having difficulty breathing?: dys- pnea 12. What term describes the situation in which an assumption is made that an unconscious or otherwise physically unable pt consents to medical treat- ment?: implied consent 13. Complete cardiac diastole corresponds to which portion of the cardiac cycle on an electrocardiogram (ECG)?: T wave 14. During CT arthrography, iodinated contrast media is injected directly into the:: joint space 15. Which of the following is considered one of the iso-osmolar contrast media (IOCM)? a. iodixanol b. iopamidol c. iohexol d. ioversol: iodixanol (Visipaque) Iohexol (Omnipaque), iopamidol (Isovue), and ioverso