The hazards of an imaging test can vary depending on the test. If you do coronary angiography of the heart, because it is an invasive examination, there will be some complications during the puncture process, and in the process of using the contrast agent, there will also be a tearing of the inner lining of the coronary arteries, stripping, coronary artery spasm,
and even lead to a certain degree of angina pectoris, and in severe cases, it will lead to sudden cardiac death, especially in elderly patients. During the examination, patients are also exposed to some degree of radiation as it is performed under an X-ray fluoroscopy machine, but this radiation is usually mild.
In the case of tubal imaging, there is a possibility of localized pain after the imaging, which usually resolves on its own, as well as a small amount of bleeding within a week, which is not a big problem. Gastrointestinal imaging is generally not very dangerous.
Expanded information:
Unsuitable for people: bronchography, recent (about 20 days) a large number of hemoptysis; active tuberculosis; cardiopulmonary insufficiency; iodine allergy; sulfonamide allergy. Barium intestinal examination, suspected of colonic necrosis is prohibited.
Oral cholecystography, with severe hepatic and renal insufficiency and severe jaundice is not suitable for this test. Gastrointestinal barium meal contrast, suspected gastrointestinal perforation of the gastrointestinal tract is prohibited barium for gastrointestinal examination, and need to switch to other water-soluble contrast media.
Prior to the examination: allergy test for the contrast agent is required. Fasting, clean intestines. During the examination: cooperate with the doctor, eliminate the patient's concerns, so that he or she can accept the examination in a good psychological state. Strictly implement the principle of aseptic operation
Reference:
Baidu Encyclopedia - contrast examination