In this paper,the vector equation of a generaliseddoubly wound helix was derived.Treloar’s pliedyarn geometry could be obtained as a special case ofthe generalised doubly wound helix.The shortest fi-bre length around...In this paper,the vector equation of a generaliseddoubly wound helix was derived.Treloar’s pliedyarn geometry could be obtained as a special case ofthe generalised doubly wound helix.The shortest fi-bre length around the surface of a helical tube(formed by fibre helices)was determined by apply-ing variational principles.The fibre length as calcu-lated by using Treloar’s geometry was compared in-directly with the shortest possible fibre length at dif-ferent levels of yarn deformation when some of Tre-loar’s rigid geometrical constraints were relaxed.Anew idea based on non-concentric circles was intro-duced to approximate the fibre helix movement in atwo-ply yarn.A torsional model of two-ply yarnwas developed and the theoretical predictions werecompared with some preliminary experimental re-sults.展开更多
目的探究腕掌侧游离动脉化静脉皮瓣与前臂静脉皮瓣在修复手部创面中的应用。方法选取2018年2月至2019年8月于四川省骨科医院接受治疗的86例手部创伤患者为研究对象。按照治疗方式不同将入选患者分为动脉化前臂静脉皮瓣组(接受腕掌侧游...目的探究腕掌侧游离动脉化静脉皮瓣与前臂静脉皮瓣在修复手部创面中的应用。方法选取2018年2月至2019年8月于四川省骨科医院接受治疗的86例手部创伤患者为研究对象。按照治疗方式不同将入选患者分为动脉化前臂静脉皮瓣组(接受腕掌侧游离动脉化静脉皮瓣修复术治疗)和前臂静脉皮瓣组(接受前臂静脉皮瓣修复术治疗),每组各43例。比较两组患者皮瓣成活率、术前和术后各时间点总主动活动度(total active movement,TAM)评分、皮肤恢复情况、创伤愈合情况和不良反应发生情况。结果动脉化前臂静脉皮瓣组患者创伤愈合时间显著短于前臂静脉皮瓣组(P<0.05),严重色素沉着发生率和术后不良反应发生率均显著低于前臂静脉皮瓣组(均P<0.05),皮瓣静态两点辨别觉显著小于前臂静脉皮瓣组(P<0.05),皮肤恢复正常比例和皮瓣成活率均显著高于前臂静脉皮瓣组(均P<0.05)。两组患者术后1周、1个月和2个月TAM评分较术前均逐渐升高(均P<0.05),动脉化前臂静脉皮瓣组患者术后各时间点TAM评分均显著高于同期前臂静脉皮瓣组(均P<0.05)。结论与前臂静脉皮瓣修复术相比,腕掌侧游离动脉化静脉皮瓣修复术用于手部创面修复可有效促进创面愈合,提高皮瓣成活率,加快术后恢复,降低不良反应发生率。展开更多
Infections frequently occur after skin injuries,posing a significant challenge in current clinical care.Frequently changing dressings to minimize wound infections and adhesions results in large amounts of medical wast...Infections frequently occur after skin injuries,posing a significant challenge in current clinical care.Frequently changing dressings to minimize wound infections and adhesions results in large amounts of medical waste.Therefore,developing environmentally friendly multifunctional dressings has considerable application and translational significance.This study aimed to prepare a wound dressing with favorable antimicrobial properties and biosafety by grafting a natural antimicrobial peptide,polylysine,onto a traditional cotton textile dressing.The cotton textile dressing offers excellent moisture absorption and softness,while polylysine provides excellent biocompatibility,a broad antimicrobial spectrum,and high stability.Furthermore,both materials are natural and biodegradable,making them ideal for environmentally friendly wound dressings.展开更多
文摘In this paper,the vector equation of a generaliseddoubly wound helix was derived.Treloar’s pliedyarn geometry could be obtained as a special case ofthe generalised doubly wound helix.The shortest fi-bre length around the surface of a helical tube(formed by fibre helices)was determined by apply-ing variational principles.The fibre length as calcu-lated by using Treloar’s geometry was compared in-directly with the shortest possible fibre length at dif-ferent levels of yarn deformation when some of Tre-loar’s rigid geometrical constraints were relaxed.Anew idea based on non-concentric circles was intro-duced to approximate the fibre helix movement in atwo-ply yarn.A torsional model of two-ply yarnwas developed and the theoretical predictions werecompared with some preliminary experimental re-sults.
文摘目的探究腕掌侧游离动脉化静脉皮瓣与前臂静脉皮瓣在修复手部创面中的应用。方法选取2018年2月至2019年8月于四川省骨科医院接受治疗的86例手部创伤患者为研究对象。按照治疗方式不同将入选患者分为动脉化前臂静脉皮瓣组(接受腕掌侧游离动脉化静脉皮瓣修复术治疗)和前臂静脉皮瓣组(接受前臂静脉皮瓣修复术治疗),每组各43例。比较两组患者皮瓣成活率、术前和术后各时间点总主动活动度(total active movement,TAM)评分、皮肤恢复情况、创伤愈合情况和不良反应发生情况。结果动脉化前臂静脉皮瓣组患者创伤愈合时间显著短于前臂静脉皮瓣组(P<0.05),严重色素沉着发生率和术后不良反应发生率均显著低于前臂静脉皮瓣组(均P<0.05),皮瓣静态两点辨别觉显著小于前臂静脉皮瓣组(P<0.05),皮肤恢复正常比例和皮瓣成活率均显著高于前臂静脉皮瓣组(均P<0.05)。两组患者术后1周、1个月和2个月TAM评分较术前均逐渐升高(均P<0.05),动脉化前臂静脉皮瓣组患者术后各时间点TAM评分均显著高于同期前臂静脉皮瓣组(均P<0.05)。结论与前臂静脉皮瓣修复术相比,腕掌侧游离动脉化静脉皮瓣修复术用于手部创面修复可有效促进创面愈合,提高皮瓣成活率,加快术后恢复,降低不良反应发生率。
基金supported by the National Natural Science Foundation of China(Nos.82370977,52073186)Medical Science and Technology Project of Sichuan Provincial Health Commission(No.21PJ059)+2 种基金Science and Technology Application Fundamental Project of Sichuan Province(No.2022YFS0124)Funding for Distinguished Young Scholars of Sichuan Province(No.23NSFJQ0001)Strategic Cooperation Projects of Yi Bin City and Sichuan University(No.2020CDYB-6)。
文摘Infections frequently occur after skin injuries,posing a significant challenge in current clinical care.Frequently changing dressings to minimize wound infections and adhesions results in large amounts of medical waste.Therefore,developing environmentally friendly multifunctional dressings has considerable application and translational significance.This study aimed to prepare a wound dressing with favorable antimicrobial properties and biosafety by grafting a natural antimicrobial peptide,polylysine,onto a traditional cotton textile dressing.The cotton textile dressing offers excellent moisture absorption and softness,while polylysine provides excellent biocompatibility,a broad antimicrobial spectrum,and high stability.Furthermore,both materials are natural and biodegradable,making them ideal for environmentally friendly wound dressings.