Word parts
What it means
A scan in which the client lies on a table that slides through a ring-shaped machine. X-rays pass through the body from many angles, and a computer builds them into thin "slices" that show bones, organs, blood and soft tissue. It is quick, so it is often used in emergencies, such as checking the brain for bleeding after a fall or stroke. Some scans use a contrast dye, given by mouth or IV, to make parts show up better.
For the nurse
Before a scan with IV contrast, ask about past reactions to contrast dye and check kidney function (creatinine), because the dye can harm the kidneys; clients taking metformin may need it held as ordered. Ask whether the client could be pregnant. Encourage fluids afterward, if allowed, to help clear the dye.
In a chart
"CT of the head without contrast ordered stat for new left-sided weakness."
At a glance
| Abbreviations | CT; CAT (computed axial tomography) |
|---|---|
| Everyday words | CT scan, CAT scan |
| Spanish | tomografía computarizada |
| Also written | CAT scan, CT scan, CT, CT scans, CAT scans |
Related terms
creatinine
A waste product of muscle that the kidneys remove from the blood; its blood level is used to measure how well the kidneys work.
magnetic resonance imaging
An imaging test that uses a strong magnet and radio waves to make detailed pictures of the inside of the body.
x-ray
A picture of the inside of the body made with a small dose of radiation; also called a radiograph.