A treatise on the diseases and injuries of the larynx and trachea : founded on the essay to which was adjudged the Jacksonian prize for 1835 / by Frederick Ryland.

  • Ryland, Frederick (Surgeon)
Date:
1837
Catalogue details

Licence: Public Domain Mark

Credit: A treatise on the diseases and injuries of the larynx and trachea : founded on the essay to which was adjudged the Jacksonian prize for 1835 / by Frederick Ryland. Source: Wellcome Collection.

Provider: This material has been provided by University of Bristol Library. The original may be consulted at University of Bristol Library.

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    The development of the trachea is not marked by any striking period of increase, like that of the larynx ; its dimensions enlarge gradually, like the other organs of the body. Its length is about the same in adults of both sexes, and corresponds with the length of the neck; its width, which is equal throughout its whole extent, has reference to the size of the lungs. The diameter of the trachea is greater in males than in females, being about ten lines in the former and eight lines in the latter. CONGENITAL MALFORMATIONS. Original defects and vices of conformation are less common in the larynx and trachea than in almost any other organ of the body. M. Geoffroy Saint Hilaire, in his elaborate work upon Les Ano- malies cF Organization,* remarks that he has never known any example either of absence or of a double formation of the larynx, of the trachea, or of the bronchi. The epiglottis has occasionally been deficient, and it has been found adherent to the base of the tongue.f M. Billard has once observed, upon a new-born infant, a very marked defect in symmetry between the two lateral parts of the larynx.;}: He has also seen, in another case,§ a great degree of narrowness in the larynx, whilst this organ had its natural length. In this child, the orifice of the mouth was only six lines in diameter, and the diameter of the base of the tongue was, also, only six lines ; the distance between the great cornua of the os hyoides was seven lines. All these parts had their natural length, but not the breadth which is proper to them ; so that it appeared as though the lateral parts of the face had been compressed, with the effect of putting a stop to their development in width. Dr. Houston II relates a case which occurred within his own • p. 729. t Ibid, p. 550. X Traild <les Maladies dcs Enfans, p. 494. § Ibid, p. 207.