Contrast Media and Pharmacology Questions and Answers Flashcards
6 cards from real CAMRT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Contrast Media and Pharmacology Questions and Answers flashcards as text
A patient with a history of mild contrast reaction (hives) is scheduled for contrast CT. What protocol is recommended?
Answer: Premedicate with corticosteroids and antihistamines
Premedication reduces the risk of repeat reaction for patients with mild prior reactions.
What is the primary mechanism by which iodinated contrast enhances CT images?
Answer: Attenuates X-rays due to iodine high atomic number
Iodine (Z=53) causes significant X-ray attenuation through photoelectric absorption.
Which lab value must be checked before giving iodinated contrast to a diabetic patient on metformin?
Answer: Estimated glomerular filtration rate (eGFR)
eGFR is checked because contrast-induced kidney injury could impair metformin clearance, risking lactic acidosis.
What is the osmolality classification of iohexol (Omnipaque)?
Answer: Low-osmolality with fewer adverse reactions than HOCM
Iohexol is a non-ionic, low-osmolality contrast medium with significantly fewer adverse reactions.
A patient develops bronchospasm during contrast-enhanced CT. What is the first-line treatment?
Answer: Nebulized salbutamol
Nebulized salbutamol directly relaxes bronchial smooth muscle for isolated bronchospasm.
What is the recommended maximum contrast volume for a patient with eGFR of 35 mL/min?
Answer: Volume should not exceed the eGFR value (35 mL)
The contrast volume-to-eGFR ratio guideline limits volume in mL to the eGFR value.