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Analysis of Ureteral Stent Compression Force and its Role in Malignant Obstruction

Authors
Journal
The Journal of Urology
0022-5347
Publisher
Elsevier
Publication Date
Volume
181
Issue
1
Identifiers
DOI: 10.1016/j.juro.2008.08.125
Keywords
  • Ureter
  • Stents
  • Ureteral Obstruction
  • Nephrostomy
  • Percutaneous
Disciplines
  • Medicine

Abstract

Purpose Extrinsic ureteral obstruction can be a challenging entity for the urologist since half of the ureteral stents placed for malignant obstruction fail. We evaluated the resistance to radial compression of various stents. Materials and Methods Silhouette® 4.6Fr, 6Fr and 8Fr, Sof-Curl™ Tecoflex® 6Fr, Resonance® 6Fr, Polaris™ Ultra 6Fr and 7Fr, and Percuflex® 6Fr and 8Fr stents were tested. The force needed to compress the stent to 50% of its original external diameter was measured at 3 locations along the stent length, including proximal, middle and distal. Statistical analysis was performed. Results Statistically greater force was required to compress the Resonance and Silhouette stents compared to all others tested. These results were maintained at all 3 locations along the stent. Only the Polaris 6Fr stent differed in resistance to compression along the stent length. Conclusions The significantly higher forces required to compress the Resonance and Silhouette stents may translate into improved success in patients with malignant ureteral obstruction.

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