. Anatomy, descriptive and applied. Anatomy. THE ARCH OF THE AORTA 581 extremities. An aneurismal tumor, taking origin from the posterior part of the vessel, may press upon the trachea, impede the breathing, or produce cough, hemoptysis, or stridulous breathing, or it may ultimately burst into that tube, producing fatal hemorrhage. Again, its pressure on the laryngeal nerves may give rise to symptoms which so accurately resemble those of laryngitis that the operation of tracheotomy has in some cases been resorted to, from the supposition that disease existed in the larynx; or it may press upon
. Anatomy, descriptive and applied. Anatomy. THE ARCH OF THE AORTA 581 extremities. An aneurismal tumor, taking origin from the posterior part of the vessel, may press upon the trachea, impede the breathing, or produce cough, hemoptysis, or stridulous breathing, or it may ultimately burst into that tube, producing fatal hemorrhage. Again, its pressure on the laryngeal nerves may give rise to symptoms which so accurately resemble those of laryngitis that the operation of tracheotomy has in some cases been resorted to, from the supposition that disease existed in the larynx; or it may press upon the thoracic duct and destroy life by inanition; or it may involve the oesophagus, producing dysphagia; or may burst into the oesophagus, when fatal hemorrhage will occur. Again, the innominate artery, or the sub- clavian, or left carotid, may be so obstructed by clots as to produce a weakness, or even a disap- pearance, of the pulse in one or the other wrist or in the left temporal artery; or the tumor may present itself at or above the manubrium, generally either in the median line or to the right of the sternum, and may simulate an aneurism of one of the arteries of the neck. Branches (Figs. 429 and 430).—The branches given off from the arch of the aorta are three in number—the innominate, the left common carotid, and the left subclavian arteries. RigJit pulmonaty vein. Right pulmonai y- vein. subclavian ffi*/o\ a)tery. Left . carotid Inf6)101 thyroid I em artery. Bight common carotid artery. -Relation of great vessels at base of a fetal heart, seen from above (enlarged). (From a preparation in the Museum of the Royal College of Surgeons of England.) Peculiarities. Position of the Branches.—The branches, instead of arising from the highest part of the arch (their usual position), may be moved more to the right, arising from the commencement of the transverse or upper part of the ascending portion; or the distance from one another at their origin may be
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1913
