Abstract

It is known that preparation of servicemen implementation of official duties includes for itself studies on grounds, where firing is executed from a different armament. Possibility of timely exposure of an increase sensitiveness of persons to the noise loading that can be soil for development in future of defeat of the auditory system under act of sounds of high intensity in the conditions of realization of battle actions gives an opportunity to avoid such unfavourable development of events.

The universally recognized objective method for determination of the state of receptor department of auditory analyzer is a method of registration of otoacoustic emission (ОАЕ), that found wide application in the different screenings programs.

Aim: to define changes in the receptor department of auditory analyzer of servicemen from data of отоакустичної emission at implementation of firing on a ground

Materials and methods: an otorhinolaryngologic inspection is conducted 28 servicemen that worked off skills of application of rifle armament (Kalashnikov machinegun without and from under a barrel grenade launcher) in the conditions of ground. Fighters were inspected to realization of firing and directly after them. The inspections of ОАЕ conducted by means of devices: impedance metter-tympanometter of “Sentiero Desktop” PATH MEDICAL Gmbh (Germany), audiometer of Amplivox 270 (Great Britain).

Results and their discussions: Before realization of firing of ОАЕ registered oneself practically in all inspected. After implementation of firing by us repeatedly was undertaken a study of ОАЕ for servicemen of MFU. In 11 persons (of 40,7%) ОАЕ after firing did not register oneself. In 3 (11,1%) – the answer of more sub-zero intensity registered oneself, than to the shootings job processing. In 7 fighters (of 25,9%) amplitude answer grew vice versa. Will mark that these servicemen after firing grumbled about a tingle, feeling of the mode of occurrence, cotton “wool” in ears. Such unpleasant feeling lasted 1-6 hours after firing. For all other servicemen of ОАЕ registered oneself approximately at the same level, that and to implementation tasks.

Pays attention on itself, that the most meaningful changes are an increase or decline – amplitudes of answer to ОАЕ we registered for the investigated persons in the area of 4-6 kHz, that answers the basal area. The expressive enough change of amplitude of answer to ОАЕ is registered in inspected on frequency of 4 kHz can be the sign of reaction to the receptor in the corresponding area of cochlea on the noise loading that shows up an increase or oppression of his activity, and can testify including to violation of adaptation reactions in reply to the sounds of high intensivity.

Conclusions:

1. Undertaken studies testify to importance of determination of ОАЕ on frequency of foods distortions for servicemen, that execute the educational firing on a ground that assists the timely and objective exposure of possible defeats of receptor structures of auditory analyser.
2. The results of registration of DРОАЕ can be drawn on for prognostication of possible development of sensorineural violations at presence of unfavourable factors at battle acoustic trauma. The methodology can be used for screening or determining the suitability of military personnel to perform duties in certain branches of the military (e.g. artillery).
3. Change of reactivity of receptor department of auditory analyser as an increase or decline of amplitude of answer to ОАЕ, especially in the zone of frequencies of 4-6 кГц can serve as the objective sign of unfavourable prognosis in relation to development of SNHL at voice loading.

Key words: otoacoustic emission, hearing analyser, sensorineural disorders, acoustic barotrauma.