CT Contrast Injection (Flow Rate, Delay and Duration)

CT injection protocols for timing of iodinated contrast injection including:
Patient Factors
Patient weight
Lean body mass
Patient Cardiac Output
Contrast Media Factors
Injection Flow Rate
Injection Volume
Contrast Media Density
Injection Duration
CT Scanner Factors
Bolus Tracking
Contrast Tracking (Smart Prep)
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[@jenniferlewis2137]

Thanks for these videos! I’m currently cross training in CT. These are very helpful!

[@abbywiltshire2383]

studying for my boards, thank you for your content!!

[@HowRadiologyWorks]

Good luck!! You will do great Abby

[@aniteshbarik2763]

nice video ❤️

[@HowRadiologyWorks]

Thank you 🤗 for the comments.

[@thecreator1127]

Thank you so much Sir

[@HowRadiologyWorks]

Most welcome

[@hakdognialjhor2286]

Hi Sir, I have a question regarding the pressure limit. Is it true that the purpose if pressure limit is to prevent the syringe and coil from exploding and doesn't really do much to prevent extravasation. Thank you.

[@HowRadiologyWorks]

patientsafety.pa.gov/ADVISORIES/Pages/200812_136.aspx , yeah a major reason for the limit is to prevent tubing issues

[@Yettoachieve]

Sir I have a question.I had done ct scan of neck and thorax plain andd contrast. Is this kindd of scan is same as ct angiogram. Please reply

[@HowRadiologyWorks]

Hi, sorry we don’t answer questions related to personal scans but in general a CT angiogram is a scan taken to see the arteries and it is contrast enhanced.

[@BadGuyDennis]

Simply put. For CT angiogram, we scan the patient while most of the contrast agent is still in arteries. Accurate timing is essential for the success of the exam. Standard plain & contrast study of specific region usually less timing critical. And one fundamental difference is that there must have scan sequence that we wait untill the contrast agent infiltrate deep into the organs or tissues.

[@BadGuyDennis]

Simply put. For CT angiogram, we scan the patient while most of the contrast agent is still in arteries. Accurate timing is essential for the success of the exam. Standard plain & contrast study of specific region usually less timing critical. And one fundamental difference is that there must have a scan sequence that we wait until the contrast agent infiltrate deep into the organs or tissues.

[@folkmoot36]

Question, I had a CT cardiac angiogram. When the contrast was injected, my heart beat went up over 100 bpm because it burned like hell , especially in my head and groin area. This ruined the image. They like you to have a low bpm between 50 to 65 bpm to get a good image. How can this high bpm be avoided after the contrast injection? I was given a gts tablet and beta blocker.

[@HowRadiologyWorks]

I’m sorry that you had a hard experience on your exam. Sorry we don’t offer medical advice on this station for specific issues.

[@folkmoot36]

@@HowRadiologyWorks thanks

[@ryanjefferson1428]

unlike antibiotics and other medications injected Intravenously, contrasts used in CT scans do not cause pain itself when injected. some factors that might have caused you the pain includes a lot of factors like the quality of the vein your IV access is put, location of the vein your access is put, the skill the person who did your access, the quality of how the access is set up, temperature of the contrast (it is generally recommended to be injected on the same temperature of the body before injection to keep it less viscous than it is when it is cold) also, most often contrast injection on Cardiac CTs is not painful, although a patient will definitely feel a sensation from the injection since contrast on these types of scans are injected faster than other more general type of contrast procedures. if you say your heartbeat spiked during the time you were in pain. then being more comfortable during your next scan might be a solution. you can always communicate to your technologists or doctors or nurses involved in the scanning. medication wise online prescriptions from a non medical regulated platform is not a good idea

[@BadGuyDennis]

As a CT radiographer for almost 20 years, I have some tips that might help you get through the toughness you experienced. First, maintain thorough hydration. This is really helpful to reduce the "burning" sensation during the contrast injection. Trust me. It was my very real personal experience. I'm not just a CT operator, I has been as a patient having contrasted CT studies being done several times on myself. Given the same contrast injection volume and flow rate, I feeled less hotness if I have more hydration. Select a medical centre facilitate with a more advanced CT scanner model, especially with dual energies. These machines are much more capable. First, they scan faster, shortened the actual scanning time and thus reduce contrast volume to be injected. They can use the lower X-ray energy portion to fully exploit the contrast enhancement. As a result, slower flow rate and smaller volume with optimal result is achievable (given that the patient "slim" enough). Provided that beta-blocker has been given, these machines are still capable to capture images with decent quality even the heart rate surged up to over 90 bmp during scanning. Don't be frustrated or felt guilty about your previous failed attempt. I don't know if there is any research or study about this topic. Just my gut feeling during my entire career so far. The younger the subject, the more intense hotness feeling they complain; patients with prolonged poor controlled diabetes or patients with dementia could feel nothing at all during the injection. I won't say you're in perfect shape. You used the term "burning" to describe your feeling. In my perspective, you probably are still in a good shape. In other words, it's not entirely a bad thing.

[@folkmoot36]

@@BadGuyDennis And Ryan Jefferson. Thank you for your replies, i really appreciate them. I was fully hydrated at the time i believe. We are talking about the NHS here, who are 20 years behind the rest of the world in lots of ways. They put me in the scanner for a test run. i went in , a very loud voice tells you to hold your breath for 15 seconds, then i came out , they give me a betablocker and put me back in, but they left my arms at my side. So i had to stop them. They corrected their mistake and started again. I heard the machine start up , then the extreme burn of the contrast, but no command to hold my breath. That was mistake number two. They wanted to scan me again straight away , which i wasn't prepared to do, due to the pain and the high amount of radiation i would receive. I believe each scan is the equivalent of 2.5 years of back ground radiation. And according to the university of California , this scan causes untreatable cancer in one in two thousand. So having 5 years worth of radiation didn't appeal to me. Their laissez-fair attitude towards irradiating patients, i found quite disturbing. I have given up on getting a proper diagnosis or getting any treatment. I know i have unstable angina and i am in a bad way having survived two serious attacks , and although i am relatively young, i am ready to meet my maker, and the hypothetical divisive medical industry can go to hell where it belongs I might sound a bit ungracious, but i waited 16 months to get that scan, and the incompetent fools messed it up. And i have a suspicion nagging at the back of my mind, that they mess up on purpose. I do not trust the medical industry, and i think i am justified in that mistrust. After all, medical mistakes are the third biggest single killer in America and i suspect it is similar in my country Britain, where the NHS is teetering on he edge of collapse.

[@garybarker9587]

Triple lumen

[@garybarker9587]

What is a triple lumen use for?

[@HowRadiologyWorks]

Do you work for Triple Lumen?