[Improved tumor stent for internal palliative urinary diversion].
The disadvantages of high flexible endoureteral stents (DJ) in case of tumorinduced extrinsic ureteral compression are due to an insufficient vertical stability of the used stents leading to stent-compression and consecutive hydro- or pyonephrosis. The new developed tumor-stent used in case of tumor-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-stability plastics but is of sufficient elasticity in length. Both ends consist of extremely elastic J-parts guaranteeing an exact fixation. As against common DJ's with the same outside-diameter the new stent has a comparable interior diameter and compared to used "old" tumor stents promises a higher interior flow in case of extrinsic diseases. The application can be undertaken in well-known technique, needs no special instrumentation and no learning-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 can be seen as a better solution instead of percutaneous nephrostomy or frequent stent changing in patients with tumor induced extrinsic ureteral compression.
Schlick
R W
RW
Klinik für Urologie und Kinderurologie, Klinikum Fulda, Akademisches Lehrkrankenhaus, Philipps-Universität Marburg.
Seidl
E
E
Küster
J
J
Kalem
T
T
Hanke
P R
PR
Planz
B
B
D004548:Elasticity; D004867:Equipment Design; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D010166:Palliative Care; D015607:Stents; D014516:Ureteral Neoplasms / Q000209:etiology / Q000628:therapy*; D014517:Ureteral Obstruction / Q000209:etiology / Q000628:therapy*; D014547:Urinary Diversion / Q000295:instrumentation*; D014563:Urodynamics / Q000502:physiology