摘要
运用一体化编织技术,通过调控镍钛合金丝直径、编织目数(PPI)和材料配比,制备了一系列一体化编织食管覆膜支架,探讨了以上编织工艺参数与食管覆膜支架之间的构效关系。结果表明:镍钛合金丝直径是影响食管覆膜支架径向压缩强力的主要参数。本文研究范围内,镍钛合金丝直径越大,覆膜支架的径向支撑性越好,但较大的镍钛合金丝直径会降低覆膜支架的柔顺性,故较合适的镍钛合金丝直径为0.20~0.22 mm。PPI对覆膜支架的径向支撑性和柔顺性影响较小,但仍可见PPI增大时,覆膜支架的径向压缩强力呈增大趋势,但当PPI为40时,覆膜支架弯曲时的直径减小率最大,故较优的PPI为35。材料配比本质上是指覆膜支架中镍钛合金丝的含量,材料配比大,镍钛合金丝的含量高,覆膜支架的径向压缩强力大,直径减小率小,然而,覆膜支架的弹性回直力增大,即柔顺性降低;因此,较合适的材料配比为13。
Objective Minimally invasive intervention with esophageal covered stents is an important means of palliative treatment of esophageal stenosis.However,adverse events of conventional esophageal covered stents have often been reported in publications recently.A new mechanically braided integrated esophageal covered stent is designed and expected to overcome the shortcomings of the existing esophageal covered stent and become the next generation of innovative products,but its basic research is not sufficient.Method A series of integrated esophageal covered stents were braided using integrated braiding technology by adjusting the point per inch(PPI),the diameter of nickel titanium alloy wire and the number ratio of the wire to PET yarns.Moreover,the mechanical properties and compliance of these covered stents were systematically studied,mainly discussing the structure-property relationship between the above braiding parameters and the radial compression force,elastic recovery rate,stress relaxation rate,diameter reduction rate and elastic straightening force of the covered stents.Results The diameter of nickel titanium alloy wire is the main parameter affecting the radial compression force of the esophageal covered stent.Within the scope of this study,the larger the diameter of nickel titanium alloy wire,the better the radial support of the covered stent.Compared with 0.24 mm nickel titanium alloy wire,0.20 mm and 0.22 mm nickel titanium alloy wires can meet the radial support force required for esophageal stent,and a larger nickel titanium alloy wire diameter reduced the flexibility of the covered stent(Fig.7),so the suitable nickel titanium alloy wire diameter should be 0.20-0.22 mm.PPI has less effect on the radial support and compliance of the covered stent(Fig.4),that when the PPI increases,the radial support of the covered stent is better.When the PPI is 40,the diameter reduction rate increases when it is bent(Fig.7),so the optimal PPI should be 35.The number ratio of the wire essentially refers to the content o
作者
姜博宸
王玥
王富军
林婧
郭爱军
王璐
关国平
JIANG Bochen;WANG Yue;WANG Fujun;LIN Jing;GUO Aijun;WANG Lu;GUAN Guoping(College of Textiles,Donghua University,Shanghai 201620,China;Key Laboratory of Textile Science and Technology,Ministry of Education,Donghua University,Shanghai 201620,China;Guangdong UShare Medical Inc.,Zhuhai,Guangdong 519090,China)
出处
《纺织学报》
EI
CAS
CSCD
北大核心
2023年第3期88-95,共8页
Journal of Textile Research
关键词
食管狭窄
食管覆膜支架
编织工艺
力学性能
一体化
esophageal stenosis
esophageal covered stent
braiding
mechanical property
integrated
