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

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

1. The use of water as an oral contrast material for CT of the abdomen and/or pelvis has several potential advantages, including: 1. increased palatability and improved pt comfort 2. better demonstration of enhancing bowel wall 3. no interference with 3D applications: 1, 2, and 3 The use of water as a neg contrast agent is becoming increasingly common for many CT applications for the abdomen and pelvis 2. A pt's BP is measured 140/70 mm Hg.The number 140 represents: a. pressure within arterial vessels during contraction of the heart b. pressure exerted on the chambers of the heart while it is relaxed c. pressure within the arterial vessels while heart is relaxed d. pressure exerted on the chambers of the heart during a contraction: the pressure within arterial vessels during contraction of the heart 3. A(n) CM may be described as one that does not dissociate into charged particles in a solution.: nonionic Ionic contrast materials are salts that form independent particles in aqueous solu- tions. Nonionic contrast materials don't dissociate into charged particles (ions) when placed in solution. 4. Proper immobilization during a CT procedure may involve the use of: 1. soft, hook-and-loop (Velcro) immobilization straps 2. adhesive medical tape 3. good pt communication: 1 and 3 only 5. The normal range of GFR for men is: a. 50 +/- 14 mL/min/m^2 b. 60 +/- 10 mL/min/m^2 c. 70 +/- 14 mL/min/m^2 d. 80 +/- 10 mL/min/m^2: 70 +/- 14 mL/min/m^2 Normal GFR for women is: 60 +/- 10 mL/min/m^2 6. Risk factors for contrast-induced nephrotoxicity (CIN) include: 1. diabetes 2. advanced age 3. hematuria: 1 and 2 only Risk factors for CIN include preexisting compromise of renal function, dehydration, diabetes, myeloma, advanced age, and cardiovascular disease. 7. The reduction in number of infectious organisms w/o a complete elimination is termed: a. medical asepsis b. sterilization c. surgical asepsis d. immunization: medical asepsis accomplished through the use of soap, water, and many other types of disinfectant materials 8. Which of the following is preferred range for pt heart rate for optimal cardiac studies? a. 65-75 bpm b. 75-85 bpm c. 85-95 bpm d. greater than 100 bpm: 65-75 bpm pts with slower heart rates exhibit longer diastolic phases, which yield higher-quality cardiac CT exams. The preferred heart rate for optimal imaging on most MDCT systems is 65 bpm. Newer systems at the 64-slice level and beyond are capable of acquiring adequate cardiac CT images at higher heart rates. 9. Urticaria is another term for:: hives 10. Which of the following type(s) of oral CM could cause peritonitis if leakage from the digestive tract occurs from perforation? a. iopamidol (Gastrografin) b. barium sulfate c. diatrizoate (Hypaque) d. effervescent granules: barium sulfate barium sulfate is not water soluble and is not easily absorbed by the body. If it leaks out of the digestive tract because of perforation, this agent may cause peritonitis 11. Which of the following is not an advantage of an automatic power injector over the manual bolus method of IV contrast agent administration? a. uniform contrast enhancement throughout the exam b. consistent contrast agent admin for all pts. c. decreased risk of CIN d. shorter injection times: decreased risk of CIN 12. Which of the following is/are severe adverse reactions to iodinated IV contrast media? 1. anaphylaxis