The Study Of The Reason And Interventional Therapy Of Biliary Metal Stent Reobstruction

Purpose Patients with advanced malignant disease causing biliary obstruction usually have no opportunity to have surgery . For that time , percutaneous transhepatic cholangial drainage should be established . And in recent years , internal metallic stents have been widely applied in clinical practice as an effective treatment for obstruction of biliary ducts. This technique not only resolves obstruction , but also allows for further treatment . However , the postoperative restenosis rate reaches 13.8% , limiting the clinical application of treatment with internal stents . Secondary interventions due to stent obstruction lead to a further reduction in the patient's quality of life . In many cases a reobstructed stent with ensuing cholangities is the ultimate cause of death . Currently , large-scale clinical experiments and investigations into the mechanism of the stents reobstruction . The purpose of this study is to evaluate the reasons for the occlusion of self-expanding biliary mental stents on the basis of cholangiographic and biopsy findings . To analysis the relative factor which affect the patent time of stents , and explore the corresponding therapy measures.Methods There were 22 cases of stents reobstruction , male 14, female 8, 39-92 yearsold (mean 70.45years). The biliary obstruction was caused by biliary carcinoma in 7cases , carcinoma of gdllbladder in 1 case , Hepatocarcinoma in 1 case , carcinoma ofduodenal ampulla in 2 cases , pancreatic cancer in 6 cases . The patent time of the stentswas 10-478 day, mean was 154.82days.Firstly , a percutaneous transhepatic cholangiography was performed in 22 patients . Then biopsies were taken...