File:The surgical diseases of the genito-urinary organs including syphilis (1889) (14594679558).jpg

Identifier: surgicaldiseases00keye (find matches)
Title: The surgical diseases of the genito-urinary organs including syphilis
Year: 1889 (1880s)
Authors: Keyes, E. L. (Edward Lawrence), 1843-1924
Subjects: Urology Syphilis
Publisher: New York : D. Appleton and Company
Contributing Library: Columbia University Libraries
Digitizing Sponsor: Open Knowledge Commons

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wn withgreat force, and strikingagainst this unyielding bar,tends to dilate the urethrabehind it (Fig. 52), and thisdirectly in proportion as thestricture is slow in formingand dense in structure. Ifmore than one stricture exist,the urethra may be dilatedbetween them. This stretch-ing process tends to dilatethe mouths of all the ductsopening into the urethrabehind a stricture. In thisway the sinuses and mouthsof all the follicles becomeenlarged, and capable of en-trapping the point of a fineinstrument. This is alsotrue of the ducts in the pros-tatic sinus, which may be-come so pouched out thatthe floor of the prostatic ure-thra becomes reticulated, and composed entirely of depressions, sej^a-rated by thin fibrous partitions—these latter re)3resenting what is leftof the tissue which existed originally between the ducts of prostaticfollicles. The ejaculatory ducts may be distended in the same way ;as may also, though rarely, the seminal vesicles—the urine beingforced back into them.
Text Appearing After Image:
Fig. 52.—Taken from a patholoffical specimen, showingstricture of membranous urethra, with dihitation be-hind it, hypertrophy of bladder, dilatation of ureters,pelvis of kidneys, etc. 134: STRICTIKE OF THE URETHRA. The force exerted laterally by tlie urine propelled through theurethra by the contracting bladder js much greater than is generallysupposed. To understand this, it is only necessary to call to mind thehydrostatic paradox, Avhich demonstrates the equal pressure of Iluidsou every square line of surface with which they come iuto contact.This forcible stretching of the mucous membrane behind the strictureat every act of micturition, althougli only slight in extent at first,Aveakens the tone of the stretched portion of the canal, congests it,and leads to the formation locally of an excess of mucus. If the urinebo acid and irritating, these elTectS take place all the more rai)idly.Soon a drop of urine is retained behind the stricture in the dilatedportion of the canal, the mucu

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