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As a rule the major portion of the time required for the preliminary bladder drainage in a two-stage prostatectomy is taken in securing a snug-fitting purse-string suture around the tube.
To shorten this time and to facilitate the procedure, we have devised a trocar-drainage tube, which is carried through the bladder wall by means of a pointed obturator, which is then taken out, leaving in place the drainage tube, which is connected to a rubber tube, and the urine allowed to flow out.
No suturing of the bladder wall is required, as the tissues composing it are merely pressed apart and it fits snugly around the tube, which cannot slip out of the bladder because of a shoulder on the part of the tube in the bladder. Another shoulder on the outer part of the tube prevents its slipping into the bladder. The obturator is sharpened in a rounded manner
Ballenger EG, Elder OF. A TUBE FOR BLADDER DRAINAGE IN THE FIRST STAGE OF SUPRAPUBIC PROSTATECTOMY. JAMA. 1917;LXIX(25):2104. doi:10.1001/jama.1917.25910520003011c