A study of some casts of the infantile pharynx : with special reference to the Eustachian tube ; A note on Eustachian obstruction ; Partial bibliography of recent papers relating to the Eustachian tube / by William C. Braislin.

  • Braislin, William C. (William Coughlin), 1865-1948.
Date:
1909
Catalogue details

Licence: In copyright

Credit: A study of some casts of the infantile pharynx : with special reference to the Eustachian tube ; A note on Eustachian obstruction ; Partial bibliography of recent papers relating to the Eustachian tube / by William C. Braislin. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    level. The anterior border of the Eustachian opening remained nearly motionless, except that below it there ap- peared a slight fold which was lost in the border of the palate, moving backward and forward during the act of swallowing. When at rest the Eustachian open- ing appeared like a furrow, the lower portion of which formed a triangle, the walls above lying in contact. The act of swallowing was accompanied by a w^ave-like motion on the floor of the oriflce, then an elevation, the floor of the tube rising into the opening; and at the height of the act, the moment of greatest elevation of the floor, the furrow opened, presenting the appearance of a dark triangle, the apex of which was lost in a black line extending upward. During phonation the cartilaginous projection of the tube moves backward, and its lower border is elevated by the upward pressure of the floor. The orifice opens only during the singing of the high i or e, as with these vowels the palate is forcibly elevated and the floor of the Eustachian opening pressed upward. On sounding these vowels both the cartilage projection and the velum vibrate forcibly, and the transmission of these vibrations to the osseous portion of the tube and to the ear may explain in great measure the singing sound heard on sounding and holding the high i. The cracking sound heard on swallowing may also be explained by the movement of the cartilage of the tube. [This conclusion I believe is erroneous. It is caused by the drawing apart of the lips of the mouth of the tube]. Molinie, J., Defect of the Lips of the Eustachian Tube and Atresia of the Pharyngeal Tubal Ostium. Report of Trans. 7th Int. Otol. Cong, in Arch, of O'tol., XXXIV., 1905, p. 327 (Also in Bull, de laryngol., otol. et rhinoL, VII., 1904, p. 187). M. saw 2 cases of contraction of the naso- pharyngeal isthmus with atresia of tube. Both cases he thought due to too energetic use of galvano-caustic applica- tions. Moos, S., Klinik der Ohrenkrankheiten, Wien 1866. The folds in the lining mucous membrane of the Eustachian tube are most numerous at its lower portion and form a bulging just behind the pharyngeal orifice which aid in the closing of the tube. Moos, S., A Preliminary Notice on the Anatomy and Physiology of the Eustachian Tube. Arch. Ophthal. and Otol., I., 1869, pp. 716-717. Believes tube is closed while at rest by an intumes- cense at the pharyngeal orifice.