SU1337052A1 - Method of diagnosis of middle ear disease - Google Patents

Abstract

To improve the accuracy of diagnosis, the eardrum of the test ear is exposed to acoustic oscillations of ultrasonic frequency. The reflected oscillations are received and analyzed when the subject is examined on the left (right) side, in intermediate positions between the horizontal and the vertical position of the body, in the vertical position of the body and on the right (left) side and by comparing the nature of the reflected signals forms of middle ear diseases. with so

Description

The invention relates to medicine, namely to otolaryngology, and concerns the diagnosis of middle ear diseases in exudative forms.

The aim of the invention is to improve the accuracy of diagnosis in exudative forms of diseases.

The method is carried out as follows.

The eardrum of the ear under study is irradiated with acoustic oscillations of ultrasonic frequency, then oscillations reflected from the eardrum are received and analyzed while the patient under study is on the left (right) side, in intermediate positions between the horizontal and vertical position of the body, in the vertical position of the body and on the right (left) side and by comparing the nature of the reflected signals determine the exudative forms of the disease.

The drawing shows schematically a series of positions of the tympanum with the sequential movement of the body and head of the patient under investigation from the horizontal to the vertical position and further from the vertical to the opposite horizontal position.

The drawing shows: impaired auditory canal 1, tympanic membrane 2, drum cavity 3, abnormal contents 4, medial wall 5, ultrasound receptor-transducer running.

Beginning of the study: the patient is in a prone position on the healthy ear side.

From the drawing (a) it can be seen that in the absence or small amount of exudate in the tympanic cavity of the right (left) ear between the tympanic membrane and the surface of the exudate has an air volume that prevents the ultrasonic signal from entering the cavity behind the tympanic membrane.

In this case, only two pulses are visible on the echogram: the first is a probe, the second is reflected from the eardrum.

When the body and the head of the examined body are moved from the horizontal to the vertical position, the exudate, if it is in the tympanic cavity of the right (left) ear, begins to mix

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to the eardrum of the left (right) ear. This allows ultrasonic vibrations to partially penetrate into the tympanic cavity and reach its medial wall, which is expressed by the appearance on the echogram of a third of its small amplitude pulse at a distance of 1 from the pulse reflected from the eardrum (see drawing b).

With further movement of the head examined in a vertical position (see drawing, c), the contact area of the eardrum and exudate increases, which results in an increase in the amplitude of the third pulse at a constant position relative to the probe pulse (1,).

With further inclination of the head examined in the direction opposite to the original position (see drawing, d), the exudate completely covers the eardrum, but the surface of the exudate intersects the direction of propagation of ultrasonic vibrations at an angle. This leads to a decrease in the amplitude of the third pulse on the echogram and shift it to the left ().

. The last position (see drawing, e) corresponds to the horizontal position of the head and the Gsporus of the subject, when the exudate completely covers the eardrum.

Considering the viscosity of the exudate, each study should be carried out with a relatively slow movement of the subject from one position to another.

The method was tested on 32 patients, of which 11 people suffered from exudative otitis media 18 - chronic purulent mesotympanitis and 3 - adhesive otitis.

The use of the invention will make it possible to increase the accuracy of diagnosis of middle ear diseases by a factor of 2 compared with that of the patient.

Claims (1)

Invention Formula A method for diagnosing middle ear diseases by irradiating the tympanic membrane with acoustic vibrations of ultrasonic frequency, receiving and analyzing reflected oscillations, which means that, in order to improve the accuracy of diagnosis in exudative forms of diseases, irradiation of the eardrum, reception and analysis of reflected vibrations t consistently while being investigated on the left (right) side, in the intermediate 337052 body positions between the horizontal and the vertical, in the vertical position and on the right (left) side and by comparing the nature of the reflected signals determine the exudative forms of middle ear diseases. Compiled by F. Rogozhansky Editor L. Veseleveka Tekhred L. Oliynyk Order Д068 / 5 Circulation 594 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 Proofreader L. Beskid