When a person goes to the doctor saying: ” doctor I feel a humming in my head that is to me enloqueciendo” , most probable it is than this person is very scared thinking that the worse thing comes, than has a mortal disease and that to the being in the head surely she does not have she cures. Good, not to be hopeless. Because these hummings are the same that feel in the ears, only that when perceiving itself of stereophonic or bilateral form, the sensation is that the sound comes from the center of the head (midpoint between both ears). These sounds or any other that are perceived of subjective form, are called acufenos or tinnitus. As far as the gravity of the acufenos, he is very comforting to know that a very small percentage of cases corresponds with complex pathologies or of difficult treatment.
And within these rare diseases, the possibilities of life risk are almost null. One of the causes that more fear causes in the patients who say – I feel a humming in my head – is the one of the tumors. For any person the term tumor is synonymous of cancer, and although often this it can thus be, in the case of the tumors that cause tinnitus, this is completely erroneous. The tumor of the auditory nerve, or tumor of Shwann is a benign tumor. It is not cancer because it does not produce metastasis and it is only encapsulated in the cells of Shwann that surround the auditory nerve. This tumor is of slow growth, and although the diagnosis of a tumor always produces chills in the patient, often not even it requires intervention and simply its development is periodically controlled never being able to have the necessity to extirpate it.
In the cases where the tumor has grown of considerable form and exists risk that can press some face nerve, it is come to retire it with a very simple and fast intervention surgically. There is a well-known but very effective method little that is guaranteed to cause that the acfenos disappear for always.
A series of laws (ANVISA) regulates this procedure, and defines 14 a gamma of products that are citizens to the system of quality how much to the potential risk the health in users on the basis of norms techniques NBR-IEC, to be applied to the suppliers of medical products and in the fulfilment of the rules of the document ' ' Good the Practical ones of Manufacture of Mdicos' Products; '. In Brazil as well as in diverse countries attention in the certification of medical products if concentrates before the commercialization. The eletromdicos equipment not yet is citizens the conformity evaluation after the commercialization, in use, done exception to some equipment of x-ray and 15 radiodiagnstico . Lasers of low power characterized by not ionizing the electromagnetic radiation, (monochromatic, polarized and coherent) is studied and used clinically it has more than four decades in the treatments neuro-to articulate and of human fabrics and for being capable to induce a fotobiolgico process, or of bioestimulao, not-thermal and not-destructive they do not modify the cellular functions, being one practical one considered for literature, relatively 16 insurance . Amongst the resultant effect of the equipment the laser 17 with low intensities frequently used in therapeutical processes, exists the adverse ones, provoked for the emission of the radiation laser and that they must be observed how much to the security aspects. In them the ocular effect are enclosed, whose protection must guarantee safe levels of radiation absorption. Norm IEC 60825-1 (NBR IEC 601.2.22) suggests security requirements 18 in eletromdicos equipment the laser, including the ocular protection, based in levels of permissible maximum expositions. Biological effect (physiological, biochemists or induced mannering alterations in an organism, fabric or cell) occur when they are detectable changes capable to be measured in a biological system, after the introduction of some types of stimulatons. The comment of a biological effect 19, not necessarily suggests the existence of a biological danger or a harmful effect to the health, therefore it becomes a security risk if the detectable causes to result in damages to the health of the individual.