Contrast tests, also called contrast tests, are imaging tests that are performed with the use of substances that help achieve a better definition of the images formed, which facilitates evaluation by the doctor.
These substances are called “contrast products” because they are able to absorb the ionizing radiation of the examination and generate images defined on the device screen.There are different types of contrast, with various chemical compositions, such as barium sulfate, iodine contrast or gadolinium, for example, that are chosen according to the test to be performed, which can be performed orally, intravenously or injected into the desired cavity.
- Despite its benefits.
- The use of contrast products for testing carries risks.
- Mainly of causing side effects such as allergic reactions.
- Hypotension or renal and cardiac poisoning.
- For example.
- Should be used only in specific cases.
- With medical indication.
Although contrast tests tend to be safer and can better evaluate who should and shouldn’t, these tests can present health risks.Some of the main side effects include:
Also known as anaphylaxis, this reaction is characterized by the onset of hives, swelling of the skin, low blood pressure, tachycardia, bronchospasm and glottis edema.The allergic reaction due to the use of contrasts should be treated immediately by the hospital doctor.poses a serious risk to the health of the affected person.
One way to try to avoid this type of reaction is to ask if the person has any allergies, and it is also common for doctors to report the use of antiallergic drugs before certain higher risk tests, such as antihistamines or corticosteroids..
Contrast can have a toxic effect on the body and some of the reactions include direct effects on blood circulation, such as a decrease in pressure or inflammation of the application site.In addition, the substance may have direct toxic effects on certain organs, which may:
Generally, these effects are related to the dose or concentration of the contrast product used, and may also vary depending on the rate of infusion and the form of use of the substance, either oral or venous for example.
Also called vasomotor reactions or vagial vessels, they are not directly caused by the contrast used and their cause is generally unknown, being usually associated with anxiety or pain during administration, which causes some stimuli in the nervous and vascular system.
These reactions include low blood pressure, decreased heart rate, fainting, mental confusion, paleness or cold sweats, for example.
Some of the main tests used with contrast are
In addition to this, there are several other tests that can be done by contrast, such as mammography to evaluate changes in breast circulation or hysterosalpingography to evaluate the female reproductive system, for example, which should be indicated by the doctor as needed.every person.