The gauge of the ear

The gauge of the ear - a survey instrument of barafundle ear. The gauge of the ear consists of obturator ear (olive appropriate size or rubber, blown air from special pear spray) and the glass tubes, which accumulated drop colored alcohol. On the motion of a drop in the pipe, with simple swallowing, swallowing with a blocked nose and experience Valsalva (exhale holding the nose and mouth) judge about the state of barafundle (see) of the ear (1, 2, 3, 4-I degree).
The gauge of the ear is widely used in the selection of pilots, divers and caisson workers.

The gauge of the ear - a device for direct measurements of fluctuations of air pressure in the ear canal and indirect - through the vibrations of the eardrum in the middle ear cavity.
First ear gauge was proposed by Politzer (A. Politzer) in the middle of last century. It manometer consisted of a U-shaped glass tube with a diameter of 2-3 mm, which gained a little water. This U-shaped tube was introduced in a rubber tube, and the last was inserted into the ear canal investigated. Since that time, ear gauge has undergone numerous design changes and only in the beginning of our century Century And. Vojacek suggested ear gauge, which is used in the present and which is officially included in the nomenclature of otorhinolaryngology tools as in the civil health and medical military service of the Soviet Army and Navy. Ear manometry in the selection of workers to work in caissons, divers and pilots is performed, as a rule, ear gauge design Century Imperial Vojacek.
Rubber capsule-obturator M. at. design Century Imperial Vojacek not always well obtulerunt the ear canal, so some authors have proposed modification of the ear gauge, in which the obturator (instead of rubber capsules) applied olive several sizes of plastic or rubber. Via M. at. design M. P. Mezrina ear interventions can be performed simultaneously on both sides. X. M. Mindelheim connected to the ear of the mercury manometer for measuring air pressure in the capsule-obturator. In the ear gauge E. M. Yuganova and I. I. Panova used special devices (solar cells, electrocardiograph or mechanochemical N. N. Savitsky)that allows you to graphically log curve of pressure fluctuations in the outer ear canal and middle ear.

ear manometryEar manometry: 1 - tube manometer; 2 - tube, inlet air in capsule; 3 - rubber capsule-obturator; 4 - gauge glass; 5 - connecting rubber tube; 6 - rubber bulb to blow capsules; 7 - hold down the connecting tube.

Ear interventions, do the following: from ear gauge disconnect rubber bulb (which is used to blow air in rubber capsule-obturator). Obturator injected into the ear canal, and then explores the left hand grasps the ear studied up and back, and the right gently inserted into the ear canal obturator attached to the end of a bent metal pipe (figure). After that to a rubber tube, pre-mounted on curved knee metal tubes, attach the rubber bulb, open it clip Mora and inflate the air rubber obturator entered in the ear canal. Closing the clip Mora, second rubber tube, also pre-mounted on a straight knee metal, attach a glass tube with a diameter of 1.5-2 mm, in which pre-trying to drop the colored alcohol (M. at. design E. M. Yuganova - drop toluene). The tightness of the seal external ear canal check the filling of the subject "completeness" in the ear, and the stillness of the droplets painted alcohol in a glass tube ear gauge. If a drop of alcohol is not held still in the glass tube, the procedure of introducing M. at. in the ear canal should be repeated.
There are four degrees of barafundle ear defined ear pressure gauge. The subject I propose to make a gulp. If at this moment in a glass tube M. at. will be noticeable shift drops of alcohol is considered barafundle I degree. If the shift is a drop occurs when swallowing while holding your nose closed (experience Toynbee),- barafundle II degree. If the shift is a drop occurs when you experience Valsalva (see Valsalva experience),- barafundle III degree. IV degree of barafundle ear is the lack of traffic drops of alcohol during the first three experiments. The costs of barafundle ear I, II, III degree surveyed recognised able to work in conditions of changes of barometric pressure (aviation, decompression and diving operations). It is considered feasible in the selection of divers and pilots in case of existence of the examined IV level of barafundle ear to expose them to rises in the chamber on the "height" 3000-3500 m with a relatively rapid descent. If the investigational with the IV degree of barafundle ear tolerate this rise without reactive phenomena in the ears (pain, long blocked ears), they are recognized fit for diving or flying service. If the investigated appear expressed phenomenon of aerootite (see), they are disqualified.