FEATURES OF THE STRUCTURE OF THE EAR TUBE IN THE PRENАTAL PERIOD OF HUMAN DEVELOPMENT

Abstract

They were irregular in ten cases, rectangular in nine cases, and triangular in three cases. It has been established that the size and shape of the auditory tube in prematurely born children do not have defi nitive dimensions and its location diff ers from that in newborns. The pharyngeal openings of the auditory tubes are at the level of the hard palate and, in newborns, above the level of the hard palate. The tympanic openings from the lower part of the anterior wall of the tympanic cavity in fetuses of the seventh month of intrauterine development move completely to the upper part of it and open into the supratympanic space in fetuses of the tenth month. The identifi ed features are important in improving the technology and adequacy of surgical treatment and manipulations in prematurely born children.The structure and syntony of the auditory tube were studied in 35 human fetuses of the seventh to tenth months of intrauterine development and 11 corpses of newborns. In the fetuses of the seventh month, the shape of the tympanic openings of the auditory tubes was irregular in eight cases, triangular in three cases, and rectangular in eleven cases. The drum holes shift to the top even more. They had an irregular shape in nine cases and a rectangular shape in fi ve. In the tenth month, the tympanic openings of the auditory tubes move to the upper part of the anterior wall of the tympanic cavity and open into the supratympanic space. They had an irregular shape in ten cases, and in six cases we observed a rectangular shape of them. The tympanic openings of the auditory tubes in newborns are located in the upper part of the anterior wall of the tympanic cavity and open into the supratympanic space. They were irregular in ten cases, rectangular in nine cases, and triangular in three cases. It has been established that the size and shape of the auditory tube in prematurely born children do not have defi nitive dimensions and its location diff ers from that in newborns. The pharyngeal openings of the auditory tubes are at the level of the hard palate and, in newborns, above the level of the hard palate. The tympanic openings from the lower part of the anterior wall of the tympanic cavity in fetuses of the seventh month of intrauterine development move completely to the upper part of it and open into the supratympanic space in fetuses of the tenth month. The identifi ed features are important in improving the technology and adequacy of surgical treatment and manipulations in prematurely born children.