Coronary stent is used to treat stenosis artery by recovering the luminal diameter of artery and maintaining the normal blood flow. The geometry of coronary stent is an important factor for the radial force. In this s...Coronary stent is used to treat stenosis artery by recovering the luminal diameter of artery and maintaining the normal blood flow. The geometry of coronary stent is an important factor for the radial force. In this study,the relation between the radial force of stent and crown angle was discussed. The result showed that there was no particular rule between the radial force of stent and the crown angle. The maximum radial force of stent was obtained when the crown angle was 50. 04° and the minimum radial force was got when the crown angle was 75°.展开更多
Polydioxanone(PDS),one of the bioabsorbable materials for coronary stent,is catching eyes of researchers recently. When designing the geometry of the PDS coronary stent,the length and the height of the crown are quite...Polydioxanone(PDS),one of the bioabsorbable materials for coronary stent,is catching eyes of researchers recently. When designing the geometry of the PDS coronary stent,the length and the height of the crown are quite important. However,rarely literatures have discussed the relationship between the two geometry parameters and the radial force of the bioabsorbable coronary stent. Therefore,a current effective tool of finite element method was applied in the evaluation of the relationship. By simulating 4 groups of models,it was obtained that the radial force of the coronary stent would not definitely increase with the rising value of Lcrownfrom 0. 8 mm to 2. 4mm. Meanwhile,Hcrownand radial force of the coronary stent had no linear relationship with each other.展开更多
目的探讨以"挂钩"的方式顺行置入双J管在腹腔镜肾盂成形术中的应用。方法 2014年10月~2016年5月对28例肾盂输尿管连接部梗阻行腹腔镜肾盂成形术,在完成肾盂输尿管连接部后壁的缝合后,双J管以"挂钩"的方式顺行置入...目的探讨以"挂钩"的方式顺行置入双J管在腹腔镜肾盂成形术中的应用。方法 2014年10月~2016年5月对28例肾盂输尿管连接部梗阻行腹腔镜肾盂成形术,在完成肾盂输尿管连接部后壁的缝合后,双J管以"挂钩"的方式顺行置入输尿管内,双J管远端进入膀胱内,撤出导丝及推管,腹腔镜弯钳将双J管近端放置肾盂内,完成肾盂输尿管连接部的前壁缝合。结果 28例双J管均以顺行方式顺利置入,围手术期无并发症发生。镜下置管时间2 min 30 s^4 min 45 s,平均3 min 5 s。术后4~6周拔除双J管,复查泌尿系超声或静脉肾盂造影,肾积水较术前减轻(术前中度17例,重度11例;术后中度9例,轻度13例,无肾积水6例)。结论顺行"挂钩"法置入双J管安全、操作简便,利用双J管自身的优势,不需要额外辅助器械,为腹腔镜肾盂成形手术中置入双J管提供一种新的思路。展开更多
基金Key Project of Medicine,Science and Technical Committee,China(No.10411953300)
文摘Coronary stent is used to treat stenosis artery by recovering the luminal diameter of artery and maintaining the normal blood flow. The geometry of coronary stent is an important factor for the radial force. In this study,the relation between the radial force of stent and crown angle was discussed. The result showed that there was no particular rule between the radial force of stent and the crown angle. The maximum radial force of stent was obtained when the crown angle was 50. 04° and the minimum radial force was got when the crown angle was 75°.
基金Key Project of Medicine,Shanghai Science and Technical Committee,China(No.10411953300)
文摘Polydioxanone(PDS),one of the bioabsorbable materials for coronary stent,is catching eyes of researchers recently. When designing the geometry of the PDS coronary stent,the length and the height of the crown are quite important. However,rarely literatures have discussed the relationship between the two geometry parameters and the radial force of the bioabsorbable coronary stent. Therefore,a current effective tool of finite element method was applied in the evaluation of the relationship. By simulating 4 groups of models,it was obtained that the radial force of the coronary stent would not definitely increase with the rising value of Lcrownfrom 0. 8 mm to 2. 4mm. Meanwhile,Hcrownand radial force of the coronary stent had no linear relationship with each other.
文摘目的探讨以"挂钩"的方式顺行置入双J管在腹腔镜肾盂成形术中的应用。方法 2014年10月~2016年5月对28例肾盂输尿管连接部梗阻行腹腔镜肾盂成形术,在完成肾盂输尿管连接部后壁的缝合后,双J管以"挂钩"的方式顺行置入输尿管内,双J管远端进入膀胱内,撤出导丝及推管,腹腔镜弯钳将双J管近端放置肾盂内,完成肾盂输尿管连接部的前壁缝合。结果 28例双J管均以顺行方式顺利置入,围手术期无并发症发生。镜下置管时间2 min 30 s^4 min 45 s,平均3 min 5 s。术后4~6周拔除双J管,复查泌尿系超声或静脉肾盂造影,肾积水较术前减轻(术前中度17例,重度11例;术后中度9例,轻度13例,无肾积水6例)。结论顺行"挂钩"法置入双J管安全、操作简便,利用双J管自身的优势,不需要额外辅助器械,为腹腔镜肾盂成形手术中置入双J管提供一种新的思路。
