It helps doctors visualize the flow of blood and is especially helpful in evaluating narrowed arteries, blood clots, and vascular trauma.
Common Indications for CT Upper Limb Angiography
Your doctor may request a CT Upper Limb Angiography for:
- Detection of narrowed arteries or peripheral artery disease.
- Identifying aneurysms (bulging blood vessels).
- Assessing trauma or injury to the arm's blood vessels.
- Diagnosing deep vein thrombosis (DVT) or blood clots.
- Evaluating blood flow after a stent placement or vascular surgery.
What does the CT scanner look like?
The scanner looks like a large, wide, circular ring. You lie on a narrow table that moves through the center while images are captured.
What happens during a CT Upper Limb Angiography scan?
You will lie flat on your back on the scanner table. An IV catheter is placed in a vein—often in your opposite arm, to give the best flow rate. The table will move through the scanner as contrast dye is injected, and you will be asked to hold your breath briefly.
Do I need to prepare for a CT Upper Limb Angiography scan?
You will likely be asked to fast for 4 to 6 hours before the scan, depending on the instructions from your clinic. You should also inform your doctor about any allergies or history of kidney problems.
Can I eat or drink before my CT Upper Limb Angiography scan?
If fasting is required, you should avoid solid foods. Clear liquids might be permitted, but always follow your imaging center's instructions.
How long does a CT Upper Limb Angiography scan take?
The scanning time itself is very short, usually just a few minutes, but the overall appointment takes a bit longer for IV placement and monitoring.
Are there different types of CT Upper Limb Angiography scans?
No, it is a specific test designed specifically to look at the blood vessels in the arms using contrast dye.
Why might contrast be needed?
Contrast dye is absolutely necessary for this test. It highlights the blood vessels, making blockages, clots, or aneurysms clearly visible to the radiologist.
Is a CT Upper Limb Angiography safe?
Yes. CT scans use radiation, but modern scanners keep the dose as low as possible while ensuring clear diagnostic images.
Pregnancy Precaution
If you are pregnant or think you might be, inform your doctor or radiographer so that alternative imaging can be considered to avoid exposing the baby to radiation.
What are the risks of contrast dye?
Most people tolerate the dye very well. Rarely, it can cause allergic reactions or affect kidney function. Always tell the radiographer if you have severe allergies, asthma, or kidney disease.
Will the scan hurt?
No, the scan is painless. You may feel a quick pinch when the IV is placed, and a brief warm sensation or metallic taste when the contrast dye is injected.
Will I need to remove anything before the scan?
You will be asked to remove all jewelry, watches, or clothing with metal zippers around your chest and arms, as metal can interfere with the images.
What happens after the scan?
You can resume your normal activities right away. Drinking plenty of water will help your kidneys flush the contrast dye out of your system.
Conclusion
A CT Upper Limb Angiography is a quick and effective way to map out the blood vessels in your arms. By providing clear details, it helps your doctor pinpoint circulation issues and plan the best treatment.