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A ureteric balloon catheter is a balloon catheter intended for treating strictures of the ureter. In fact it is a double J stent on which a balloon is mounted. It is connected to a delivery device (pusher) to introduce it from the bladder into the ureter. The system comprises a non-return valve device, and a pusher with a stylet and two ports. The sideport is for injecting contrast agent to inflate the balloon, while the straight port is for the guidewire. The catheter has a relatively large-diameter central lumen and a shaft of 2 mm (6 Fr.). The balloon is in two sections: a long narrow section or shaft and a larger cranial bulb. The larger cranial bulb prevents distal migration, while the longer narrow section maintains the increased diameter of a predilated stricture in the ureter section. ==Stent placement and removal== A guide wire has to be placed in the ureter. After dilatation of the ureteric stricture with a high pressure dilatation balloon the guidewire remains in place to bring in the ureteric balloon catheter. The balloon is inflated by an injection of contrast medium via sideport of the pusher and remains in situ while the expanded urothelium heals. The stylet is used to detach the balloon catheter from the pusher. During the healing process urine drains through the wide central lumen while the balloon remains inflated. The ureteric balloon catheter may be used in conjunction with a double J stent for additional drainage. To remove the catheter after several weeks the balloon is deflated by snipping the distal end of the catheter. The catheter can then safely be pulled out. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Ureteric balloon catheter」の詳細全文を読む スポンサード リンク
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