Clinical lectures on the surgical diseases of the urinary organs . atures of the urethra, but have purposely refrained till nowfrom referring to its calibre. Fig. 1 is a rough sketch showing the normal calibre of theurethra in the adult male. It is a tracing from the originalplate in Sir Everard Homes work, published about a centuryago. He injected melted wax into the urethra from thebladder in the cadaver, and on consolidation the wax was, ofcourse, a true cast of the canal. No other method has sincebeen suggested that conveys such a true estimate of thecapacity of the urethra throughout its
Clinical lectures on the surgical diseases of the urinary organs . atures of the urethra, but have purposely refrained till nowfrom referring to its calibre. Fig. 1 is a rough sketch showing the normal calibre of theurethra in the adult male. It is a tracing from the originalplate in Sir Everard Homes work, published about a centuryago. He injected melted wax into the urethra from thebladder in the cadaver, and on consolidation the wax was, ofcourse, a true cast of the canal. No other method has sincebeen suggested that conveys such a true estimate of thecapacity of the urethra throughout its entire course. Youwill observe that contractions occur at three positions—be-hind the navicular fossa, at the bulbo-membranous junction,and at the neck of the bladder; and it is at these points that M STRICTURE OF THE URETHRA difficulty is sometimes experienced in introducing an instru-ment through the normal urethra. This difficulty is avoidedby keeping the point of the instrument along the floor at thefirst-named position and along the roof at the other Fig. i (Half-sizj i. 1 sploration of the urethra these olivary gum-elastic (Fi .2) aie undoubtedly the best. Tiny are tipped with olive-shaped bulbs, the stems being many sizes smaller in diameter. Metal instruments of the same pattern, either >r soft, are sometimes employed for the same purpose. :• r the soft, flexible, gum-elastic ones, as less liable to pain or do injury, and more calculated to adapt thein-Selves to the natural curves of the urethra. In 1 instruments of any kind through the urethra, the horizontal position is the best. The muscles are more Fig. 2. laxed than m the standing posture, and the1 .1 tall from the patient suddenly hinting is thus Id. If \ 1 1 h in n uineiii ay, 21 or i± French ; • Ei ;1 b lubi icated, and of course pi< \i<»u lv STRICTURE OF THE URETHRA 15 rendered aseptic, and introduce it slowly through the normalurethra, you will find that it glides along easily till theme
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