| 摘 要： | The use of two urethral stents woven from titanium nickel alloy(TiNi)in the form of a tubular mesh or a spiral stent (both made in China)is described.They were implanted in 62 patients with prostatic ourflow obstruction.All patients were considered contraindicated for surgery.They were divided into a spiral stent group(group 1)treated between March 1992 and May 1993,comprising 35 cases,and a tubular mesh group(group 2)treated between October 1993 and December 1994,comprising 31cases,including four failures in group 1.Thirty-theree out of the 35 patients in group 1were treated successfully.Good results were achieved in eight case(22.8%)and significant improvements occurred in 24(68.5%),giving a total effective rate of 91.3%,with a follow-up of 11to 27 months. Fourteen stents were removed within 6 months after the insertion aned six more were removed within 12 months.The mean effective time of the stent in situ was 10.8 months.All 31 cases in the mesh group were treated successfully.Dramatically goode effects were obtained in 28 cases(over 90%)and distinct improvenents were achived in two, giving a total effective rate of over 96.5%,with a follow-up of 6to 14 months(mean 10.5 months.)Cystoscopy was carried out in 12 patients afer 6 months following the imsertion.The major part of the meshes became covered by urothelium.Compared with the spiral,the mesh makes it possible to insert a prosthesis with a larger diameter and anti-pressure.The spiral,however,can be used as a temporary alternative for the relief of prostatic obstruction.A tubular mesh can work well for the relief of prostatic obstruction and remain in situ without causing major problems for at least 1 year.
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