. Surgery, its principles and practice . raw it very sHghtly in order to disengage its point from the pocket inthe bulbous urethra. A slight rotation of the tube from side to side willhelp its passage through the triangular ligament. When there is much enlargement of the prostate, the tube sometimeshas to be carried low down between the thighs in order to enable its pointto ride over the prostate into the bladder. If the straight tubedoes notpass readily, a tube with the point slightly turned up, after the mannerof a coude catheter, may be tried. If this fails, the curved tube may beused as a


. Surgery, its principles and practice . raw it very sHghtly in order to disengage its point from the pocket inthe bulbous urethra. A slight rotation of the tube from side to side willhelp its passage through the triangular ligament. When there is much enlargement of the prostate, the tube sometimeshas to be carried low down between the thighs in order to enable its pointto ride over the prostate into the bladder. If the straight tubedoes notpass readily, a tube with the point slightly turned up, after the mannerof a coude catheter, may be tried. If this fails, the curved tube may beused as a last choice. When there is much debris, it is well to commence pumping with thepoint of the tube held a little above the floor of the bladder. The objectat this time is to set the fragments whirling and to catch them while theyare suspended. If the end of the tube is buried too deeply in the detritus,it is apt to be clogged at the outset and the evacuation is thereby con-siderably hindered. Later, when the fragments are few, the tube is. Fig. 197.—Coude End op Straight is tlie best tube for general use. LITHOLAPAXy. 361 # ^ «* carried to the floor of the bladder, and a few moments should elapse afterpressing the bulb to give the fragments time to settle about the end ofthe tube before the expansion which is to suck them into it. The wedging of a fragment in the tube causes an obstruction whichis very noticeable;the compression ofthe bulb is rendereddifficult and its ex-pansion slow. Thefragment thuscaught in the mouthof the tube may bedislodged with astilet, or with carethe tube may gen-erally be drawn outwith the fragmentin it. The tube mayalso be obstructedby the bladder wall,which is sometimessucked into the orifice. When this happens, the jerk which it givesreminds one of a fish bite. If this occurs when the tube is held near thecenter of the bladder, it shows that the bladder is not sufficiently dis-tended, and water should be added through the hose at the top


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