GI & Asceptic Flashcards
1
Q
Negative Contrast
A
Decrease organ density to produce contrast
2
Q
Positive Contrast
A
Increase organ density and improve radiographic visualization (create a white or opaque area on the image)
3
Q
Examples of Negative Contrast
A
Carbon Dioxide and Air
4
Q
Examples of Positive Contrasts
A
Barium and Iodinated Contrast
5
Q
Complications of Neg. Contrast media
A
Inadvertent injection of air into bloodstream, causing an air embolus
6
Q
How do positive contrasts work?
A
By attenuating and absorbing the ionizing radiographic beam, reducing or stopping the beam from hitting the image receptor
7
Q
What type of positive contrast presents the greatest risk to the patient?
A
Iodinated
