![]() ĮT function has been investigated in Malmö, Sweden Bylander and colleagues proved that children have less efficient ET function than adults, although it does improve with aging.įor the pathogenesis of the middle ear diseases, dysfunctions of the ET have a most critical role. There is a certain spring-type action of the ET active muscular opening followed by the passive closing, which assures the clearance function of the tube. While normally the ET is passively closed, its intermittent active opening occurs when the tensor veli palatine muscle contracts during swallowing or yawning, causing ambient pressure in the middle ear nearby. Results are reported from test series carried out in healthy children a similar study between tests is included in the final Discussions section.Įustachian tube anatomy (Gray’s Anatomy 20th edition, 1918) The paper describes the test pattern used, and the computer-based platform based on: (1) Digital Signal Processing (DSP) for sound acquisition and low-level processing (2) Artificial Intelligence techniques to extract significant sound features from sonotubograms and learn a manifold context database. The paper reviews the role of tubal sonometry as a non-invasive, physiologic and easy to use method in assessing the ventilatory function and investigates the validity and reproducibility of a measuring pattern and test in a group of children. Sonotubometry is one such method despite the fact that it has been continuously improved in the last 20 years, it is not yet systematically used to evaluate the ET ventilatory function, because its measurement pattern, context mapping (patient, clinic data, medication, treatment), validation, reproducibility and value for clinic practice, have not yet been fully consolidated and integrated in a knowledge-based, service-oriented system, that can provide decision support or even diagnostic. There are several methods and tests that can assess such a complex and variable mechanism. ![]() ![]() This requires equilibrium between the middle ear and ambient gas pressure, which makes the normal functioning of active ET opening of critical importance. From the three Eustachian tube (ET) functions: middle ear protection, secretion clearance and middle ear ventilation, the ventilatory function is unanimously considered the most important one, because proper hearing is established only when tympanic membrane compliance is normal.
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