One of the most reliable assistant in the doctorcorrect diagnosis is magnetic resonance imaging (MRI). Despite the relatively long-term use of this method, patients still remains a negative attitude towards such "inventions". our site offers a deal in the study because its indications, contraindications and side effects, which are so afraid of people.
What is MRI
We will not delve into the structure of the device, andlook at the most important moments. If we compare the MRI with a known method - Ultrasound diagnostics - the fundamental difference lies in the fact that in the first image is used for the electromagnetic response of the hydrogen nuclei, and the ultrasonic waves, in fact, only reflected from the tissues and gets back to the sensor. This is the most important difference: the body structure of each person has its own number of hydrogen atoms that, when finding the body in a magnetic field produce a clear image.
Replace MRI today virtuallyimpossible, especially since complete absence of X-ray radiation and, therefore, harmless to the human body. At least, no adverse effects after this diagnostic procedure is not registered.
Most often by means of magnetic resonancetomography examine brain and spinal cord structures, joints, at least - of the internal organs. Therefore, if we talk about the fields of medicine, in which MRI is used most often, the first share traumatology, neurology and neurosurgery. In second place - pediatrics. In a separate category should include people with no specification of the diagnosis, which are borderline, when other methods of research are less informative and more durable as well as a variety of "complex" disease, requiring an accurate assessment.
In view of the structural features of the MRI apparatus, in some cases carrying out this type of diagnosis is impossible:
- in the presence of any ferromagnetic body investigationaldesigns, t. e. any metal "objects" that can be magnetized. How did they get into the body? All very, very simple: the installation plate on the bone fragments and their fixation with special screws, dental implants or dentures, implants in other parts of the body ... even tattoos containing heavy metals are strict contraindication to MRI conduct;
- previously installed a pacemaker, whose work can also disrupt the magnetic waves, and so on. d.
Simply put, if a person has been any intervention, it is important to find out, using some metals this intervention was carried out.
I wonder what would happen if all the sameput the camera in the MRI apparatus of the patient with ferromagnetic elements in the body? My answer is simple: nothing good, because from the moment the machine is turned these elements "try" to leave the body in the shortest way.
Fortunately, in most areas of medicine haveTitanium is used for a long time - absolutely inert metal that will not change its position in the study. But this does not apply to the compounds of titanium and titanium oxides.
In fact, the absolute contraindications forMRI is not a lot, but MirSovetov readers should be aware that there is still relative. The difference lies in the lack of any study of the effect of diagnostic procedures per person, or subject to certain conditions during the procedure, or in weighing all the "pros" and "cons" when it comes to human life.
So, to the relative contraindications include:
- pregnancy. Anyway, MRI clearly not "harmful" CT or X-ray examination;
- some kinds of implants, the manufacture of which may come into contact ferromagnetic metals;
- difficult conditions that require intently monitoring the vital functions of the body;
- claustrophobia. At the beginning of this article I mentioned on the form of an MRI apparatus: a small horizontal chamber with a window to the physician at the patient's face and the camera.
Why an MRI is expensive?
Yes, in most cases, MRI paid by the patient.
The high cost of research is determined not onlydemand for the method to the public and doctors, but also highly informative, consisting in a complex structure and operation. Many insurance companies pay for treatment under the policy of compulsory medical insurance (compulsory medical insurance), simply refuse to reimburse the cost of MRI, arguing that a whole list of research through which it was possible to put the correct diagnosis and prescribe treatment. So doctors are "with their hands tied" - to convey to agents meaning extra diagnostic manipulation is not possible.
Often the choice is not so great. MRI allows neurologists literally look into the man's head, without opening the skull while. With the introduction of contrast (usually gadolinium) required artery "illuminated" and allow cardiac surgeons complex manipulations have open-heart surgery. Or enable oncologists to determine exactly not only the size of tumors and detect metastases and give hope to the patient.
We can not exclude the possibility that thefuture physicians and scientists explore in more detail the action of electromagnetic waves on the body, and to prohibit the use of MRI. It can turn out, and vice versa. But as they say, my patients would survive until tomorrow, what is really there "someday" ...