Recently, minimally invasive surgeries using guide-wire, catheter, stent etc. have spread rapidly as the diagnosis and the medical treatment for a cancer, a disease in a circulatory organ etc. Currently, further maneu...Recently, minimally invasive surgeries using guide-wire, catheter, stent etc. have spread rapidly as the diagnosis and the medical treatment for a cancer, a disease in a circulatory organ etc. Currently, further maneuverability and functionability of those devices are strongly desired in order to be used widely and safely. Although Ti-Ni shape memory alloys have been used in medical devices such orthodontic wire, guide-wire, it has been suspected that Ni is allergenic and carcinogenic to the human body. Thus the development of Ni-free shape memory alloys has been strongly required. Recently, several Ni-free beta-titanium alloys such as Ti-Mo-Al, Ti-Mo-Ga, Ti-Nb-Al have been developed as new-type shape memory alloys. We have been studying Ti-Mo based beta-titanium alloys and Ti-Mo-Sn alloy has constantly super elasticity of 3%.The purpose of present study is to propose the micro catheter with thin wall and high flexibility using To-Mo-Sn alloys tube on the basis of its mechanical properties.展开更多
目的比较心脏微气泡试验联合超声定位与腔内心电图定位在儿童经外周静脉置入中心静脉导管(peripherally inserted central catheter,PICC)尖端定位中的临床效果,明确微气泡技术的应用优势。方法采用前瞻性随机对照研究,纳入2023年8月至2...目的比较心脏微气泡试验联合超声定位与腔内心电图定位在儿童经外周静脉置入中心静脉导管(peripherally inserted central catheter,PICC)尖端定位中的临床效果,明确微气泡技术的应用优势。方法采用前瞻性随机对照研究,纳入2023年8月至2024年10月某三级甲等医院小儿外科收治的152例PICC置管患儿为研究对象,采用随机数字表法将其分为试验组(微气泡联合超声实时定位)与对照组(腔内心电图定位),每组各76例。比较两组患儿定位成功率、导管尖端准确率、操作时间、并发症发生率及医疗成本。结果试验组在定位成功率、尖端准确率、操作效率、置管成本、家属满意度等方面均优于对照组,而机械性静脉炎、导管相关血栓、血流感染发生率以及2次摄片率方面均低于对照组,差异均有统计学意义(均P<0.05)。结论心脏微气泡联合超声定位技术通过动态可视化监测可提升PICC导管定位精度,在提高操作安全性和降低并发症方面优势显著,尤其适用于需规避放射暴露的儿童群体,具有重要临床应用价值。展开更多
文摘Recently, minimally invasive surgeries using guide-wire, catheter, stent etc. have spread rapidly as the diagnosis and the medical treatment for a cancer, a disease in a circulatory organ etc. Currently, further maneuverability and functionability of those devices are strongly desired in order to be used widely and safely. Although Ti-Ni shape memory alloys have been used in medical devices such orthodontic wire, guide-wire, it has been suspected that Ni is allergenic and carcinogenic to the human body. Thus the development of Ni-free shape memory alloys has been strongly required. Recently, several Ni-free beta-titanium alloys such as Ti-Mo-Al, Ti-Mo-Ga, Ti-Nb-Al have been developed as new-type shape memory alloys. We have been studying Ti-Mo based beta-titanium alloys and Ti-Mo-Sn alloy has constantly super elasticity of 3%.The purpose of present study is to propose the micro catheter with thin wall and high flexibility using To-Mo-Sn alloys tube on the basis of its mechanical properties.
文摘目的比较心脏微气泡试验联合超声定位与腔内心电图定位在儿童经外周静脉置入中心静脉导管(peripherally inserted central catheter,PICC)尖端定位中的临床效果,明确微气泡技术的应用优势。方法采用前瞻性随机对照研究,纳入2023年8月至2024年10月某三级甲等医院小儿外科收治的152例PICC置管患儿为研究对象,采用随机数字表法将其分为试验组(微气泡联合超声实时定位)与对照组(腔内心电图定位),每组各76例。比较两组患儿定位成功率、导管尖端准确率、操作时间、并发症发生率及医疗成本。结果试验组在定位成功率、尖端准确率、操作效率、置管成本、家属满意度等方面均优于对照组,而机械性静脉炎、导管相关血栓、血流感染发生率以及2次摄片率方面均低于对照组,差异均有统计学意义(均P<0.05)。结论心脏微气泡联合超声定位技术通过动态可视化监测可提升PICC导管定位精度,在提高操作安全性和降低并发症方面优势显著,尤其适用于需规避放射暴露的儿童群体,具有重要临床应用价值。
