МРТ – это эффективный и безболезненный способ diagnostics, which allows to examine in detail the pathological changes and the structure of the soft tissues of the body, bones, ligaments and muscles. The result is in most cases ready within an hour after the study, which makes it possible not to delay the examination and the choice of treatment tactics.
Но, к сожалению, не всем людям можно проводить MRI Contraindications and limitations to this study are mainly related to the presence of a metal in the body and certain diseases. A body weight of more than 120 kg can also be an obstacle for carrying out this procedure, although there are some tomographs that make it possible for patients weighing up to 180 kg to be diagnosed.
Absolute contraindications to all types of MRI
There are conditions that are incompatible with MRI.Contraindications of this group completely exclude the possibility of this diagnostic procedure. Such a study can not be carried out to people with installed pacemakers, because the magnetic field leads to disturbances in the operation of this device. Due to broken microchips, the rhythm of the heart can get lost, and a person’s health will be in grave danger (even fatal).
You cannot perform an MRI for patients who haveThe body has artificial elements made of magnetizable materials, because they can get very hot and deform while the machine is running. If a person has tattoos on his body for which paint with similar metals was used, he is also prohibited from conducting this diagnostic procedure.
Relative contraindications for MRI
There are a number of conditions in which patients do notYou can always perform an MRI. Contraindications of this group are relative, therefore, subject to certain conditions, a person can still undergo this study. These include:
- fear of confined space;
- pregnancy;
- chronic heart failure;
- mental illness;
- inability to stay in a quiet position for a long time without moving.
MRI with contrast: contraindications to the procedure
To enhance individual sections of the pictures sometimesMRI is performed with a contrast agent. Such a study is effective for the differential diagnosis of tumors and the detection of tumors of the smallest size. In addition to standard contraindications, MRI with contrast is not performed in such conditions and diseases:
- allergic reaction to the drug to enhance the image;
- pregnancy and lactation (for research with contrast - this is an absolute contraindication);
- severe chronic kidney problems;
- recently completed liver transplantation.
Restrictions on pregnancy and breastfeeding
During the MRI, the human body does not receiveradiation load (as, for example, with X-rays or CT), but is susceptible to the action of a strong magnetic field. Moreover, in many patients a long stay in a close space is accompanied by psychological discomfort. Since it is impossible for pregnant women to subject their body to stress, this study is definitely not recommended to be carried out in the 1st trimester, when all the organs of the fetus are just being formed.
The passage of MRI in the 2nd and 3rd trimester possibleonly according to strict indications. This decision should be made by the attending physician, after weighing the diagnostic benefits and risks. Women in position and lactating mothers cannot be injected contrast for MRI. Contraindications to this are due to the fact that the drug may adversely affect the intrauterine development of the child or enter the body of the newborn when breastfeeding.
MRI of the spine: contraindications to the study
For the diagnosis of hernia, osteochondrosis and otherdegenerative-dystrophic changes need to examine the spine. To distinguish these conditions from inflammation of the sciatic nerve and sciatica, the patient is often prescribed an MRI of the lumbar spine. Contraindications to this procedure are basically the same as the general restrictions for all types of this study. But there are also some specific points that are associated with the localization of the survey area.
It is impossible to perform an MRI of the back in such cases:
- the patient received an acute spinal injury that requires urgent surgical intervention (MRI takes about 10-15 minutes, and sometimes this delay can be life-threatening);
- the patient cannot lie on his back due to a strong pain syndrome, which cannot be relieved by painkillers.
MRI of the spine, like any other area, cannot be performed if debris from unknown material are stuck in the human body.
