【摘 要】
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Ureteral stent is commonly used to provide urinary drainage after urological practice.The main disadvantage of conventional ureteral stents is that the patients have to undergo a secondary surgical pr
【出 处】
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2012上海市医学会泌尿外科、男科学术年会
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Ureteral stent is commonly used to provide urinary drainage after urological practice.The main disadvantage of conventional ureteral stents is that the patients have to undergo a secondary surgical procedure to remove stents.A new braided thin-walled biodegradable ureteral stent composed of PGA(Polyglycolic acid)and PLGA(Copolymer of polylactic and polyglycolic acid)multifilaments was evaluated in vitro in this study.In vitro degradation was performed in artificial urine with pH of 5.8 and the temperature of 37℃.The mass loss,mechanical properties and morphology were observed at different degradaing time intervals of 0,1,2,3,4,5 weeks.The stent had a thinner wall than those of other degradable stents and provided better mechanical properties.The braided thin-walled biodegradable ureteral stents began to degrade after 2 weeks degradation.At the week of 5,the stems were fully degraded.The degradative process of stents is smooth and well controlled.
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