New developed tumorstent for internal palliative urinary diversion

The disadvantages of high flexible endo-ureteral stents (DJ) in case of tum orinduced extrinsic ureteral compression are due to an insufficient Vertica l stability of the used stents leading to stent-compression and consecutive hydro- or pyonephrosis. The new developed tumor-stent used in case of tumo r-induced ureteral compression is available from 6 to 8 French in diameter and 24 to 32 cm in length. The corpus consists of a combination of high-sta bility plastics but is of sufficient elasticity in length. Both ends consis t of extremely elastic J-parts guaranteeing an exact fixation. As against c ommon DJ's with the same outside-diameter the new stent has a comparable in terior diameter and compared to used "old" tumor stents promises a higher i nterior flow in case of extrinsic diseases. The application can be undertak en in well-known technique, needs no special instrumentation and no learnin g-curve. To date 52 stents at our urologic departments were placed without any problems, the latest remaining for 15 months. Tumor-induced compression or a higher rate of encrustation could not be seen. All patients tolerated these stents well. In our opinion the new stabilized endoureteral stent ca n be seen as a better solution instead of percutaneous nephrostomy or frequ ent stent changing in patients with tumor induced extrinsic ureteral compre ssion.