METHOD OF DETERMINING PROFESSIONAL SUITABILITY TO JOBS RELATED WITH INFLUENCE OF VIBRATIONAL ACCELERATION Russian patent published in 2005 - IPC

FIELD: medicine; professional diseases; labor hygiene.

SUBSTANCE: method can be used in avionics, space and naval medicine for determining of professional suitability of people being subject to influence of different accelerations. Labyrinth asymmetry is calculated by means of nystagmography at bi-thermal caloric test by relation of LAF=[(Rt+Rc)-(Lt+Lc)]:[(Rt+Rc+Lt+Lc)]100%, where LAF is labyrinth asymmetry factor, Rt and Lt is intensity of nystagmic reaction (in %) at thermal stimulation of right and left ears correspondingly, Rc and Lc is intensity of nystagmic reaction at cold stimulation of right and left ears correspondingly. Otolith asymmetry is determined by means of indirect otolythometry at registration of reflex of eyeball counter-rotation (REC) when patient lies on the right side and then on the left side. Otolithic asymmetry is calculated by relation of OA=(R-L):(R+L)x100%, where OA is otolithic asymmetry factor, R and L is intensity of eyeball counter-rotation REC(in º) at inclination to the direction of right and left eras correspondingly. Pupillary reflex PR is calculated additionally by relation of PR=[(Sd-Sl):(Sd+Sl)]%, where Sd and Sl are areas of pupils in darkness and at light stimulation correspondingly. Value of labyrinth asymmetry is assumed to be standard if it is lower than 10% and 15% for otolithic symmetry. For papillary reflex those values are assumed to be equal to 30-40%. In case all three factors are present, the professional suitability is declared. If at least one factor doesn't correspond to standard value, the patient should be judged as belonging to group of risk. In case two or all three factors do not correspond to standard values, the profession unsuitability is declared.

EFFECT: improved precision.

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