Christman Matthew S, L'esperance James O, Choe Chong H, Stroup Sean P, Auge Brian K
Department of Urology, Naval Medical Center San Diego, San Diego, California, USA.
J Urol. 2009 Jan;181(1):392-6. doi: 10.1016/j.juro.2008.08.125. Epub 2008 Nov 17.
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.
Silhouette(R) 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.
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.
The significantly higher forces required to compress the Resonance and Silhouette stents may translate into improved success in patients with malignant ureteral obstruction.
对于泌尿外科医生而言，外在性输尿管梗阻可能是一个具有挑战性的问题，因为用于恶性梗阻的输尿管支架有一半会失败。我们评估了各种支架的抗径向压缩能力。
测试了Silhouette(R) 4.6Fr、6Fr和8Fr、Sof-Curl Tecoflex 6Fr、Resonance 6Fr、Polaris Ultra 6Fr和7Fr以及Percuflex 6Fr和8Fr支架。在支架长度的三个位置（包括近端、中部和远端）测量将支架压缩至其原始外径50%所需的力。进行了统计分析。
与所有其他测试支架相比，压缩Resonance和Silhouette支架在统计学上需要更大的力。这些结果在支架的所有三个位置均保持一致。只有Polaris 6Fr支架在沿支架长度的压缩阻力方面存在差异。
压缩Resonance和Silhouette支架所需的显著更高的力可能转化为恶性输尿管梗阻患者更高的成功率。
