Mosby's CT Registry Review 3rd Edition: Practice Exam With 100% Correct Answer Rationales

Mosby's CT Registry Review 3rd Edition: Practice Exam With 100% Correct Answer Rationales As related to the cardiac cycle, the term ___ refers to the relaxation of heart muscle. - ANS: diastole Which of the following may be considered one of the high-osmolar contrast media (HOCM)? 1. iothalamate meglumine 2. diatrizoate sodium 3. iohexol - ANS: HOCM are ionic agents that dissociate into charged particles (ions) in solution. Ionic CM are salts consisting of sodium and/or meglumine. Iothalamate meglumine and diatrizoate sodium are commonly known by the brand names Conray and Hypaque, respectively. Another HOCM, Gastrografin is a solution of diatrizoate meglumine and diatrizoate sodium. which of the following medications may be administered to a patient who is having a severe anaphylactoid reaction to iodinated CM? 1. epinephrine 2. atropine 3. diphenhydramine - ANS: 1 and 3 only. epinephrine (Adrenalin) is an adrenergic drug used as a bronchodilator. Diphenhydramine (Benadryl) may be used to block the physiologic effects of the body's release of histamine, thus reducing the allergic effect of the CM. Atropine should be used only to combat bradycardia during a vagal reaction to CM. The escape of contrast material from a needle or blood vessel into the subcutaneous tissues is called: - ANS: extravasation aka infiltration Thorough explanation of the CT procedure and proper communication with the pt are vital in ensuring that: 1. breathing instructions are properly followed 2. motion artifact doesn't occur 3. pt anxiety is kept at a minimum - ANS: 1, 2, and 3 Risk factors for contrast-induced nephrotoxicity (CIN) include: