. Modern surgery, general and operative. United States at the presenttime. It is painful, unreliable, and has been replaced by ureteral catheteriza-tion. In cases in which the ureters cannot be found, segregation may be em-ployed. The three most practical segregators are Harriss, Luyss, and Cathe-lins. Professor Harris, of Chicago, has devised an instrument (Fig. 929)which in some cases simplifies the problem of obtaining unmLxed urine fromeach ureter. The double catheter is passed into the bladder. The lever isinserted in the rectum of the male and the vagina of the female. The leveris fasten
. Modern surgery, general and operative. United States at the presenttime. It is painful, unreliable, and has been replaced by ureteral catheteriza-tion. In cases in which the ureters cannot be found, segregation may be em-ployed. The three most practical segregators are Harriss, Luyss, and Cathe-lins. Professor Harris, of Chicago, has devised an instrument (Fig. 929)which in some cases simplifies the problem of obtaining unmLxed urine fromeach ureter. The double catheter is passed into the bladder. The lever isinserted in the rectum of the male and the vagina of the female. The leveris fastened to the perforated frame from the double catheter. The doublecatheter is now opened in the bladder, and the blades of the instrument areheld in position by a spring. The end of the lever in the vagina or rectumhumps up the floor of the bladder between the separated ends of the dividedcatheter, and forms a longitudinal septum or watershed between the ureteralorifices. The end of each catheter lies in the bottom of a pocket to the side. Fig. 929.—Harriss segregator fitted for use. of the watershed. By producing a very slight exhaustion of the air in thevials by means of the bulb the urine, as fast as it escapes from the ureters, dropsdirectly into the ends of the catheters and flows at once into the vials, right andleft respectively.^ In using this instrument place the patient flat on his back upon a table,the thighs and legs being flexed, and the feet, hips, and head being on the samelevel. Irrigate the bladder thoroughly with sterile water and have 150 fluid in the bladder when the blades are opened. Leave the instrument inplace for thirty minutes. It is rarely necessary to give an anesthetic. In somecases cocain must be used, and in some cases of painful cystitis ether should begiven. Harris says the instrument should not be used if there be a growth ofthe bladder that bleeds easily, if the bladder be contracted, if there be a verylarge prostate or a vesical stone.^
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