目的：探讨自制抗折压型气管导管延长管用于脑瘫患儿俯卧位下手术气道管理的效果和安全性。方法拟行功能性选择性脊神经后根切断术的脑瘫患儿25例,ASAⅠ～Ⅱ级,性别不限,年龄2～12岁,体重10～46kg。麻醉诱导插管后采用容量控制（VCV）...目的：探讨自制抗折压型气管导管延长管用于脑瘫患儿俯卧位下手术气道管理的效果和安全性。方法拟行功能性选择性脊神经后根切断术的脑瘫患儿25例,ASAⅠ～Ⅱ级,性别不限,年龄2～12岁,体重10～46kg。麻醉诱导插管后采用容量控制（VCV）通气。采用自身对照实脸,机械通气10min 后记录血压、SpO 2、P Et CO 2、气道压力峰值（P peak ）、平台压（P plat ）,采集桡动脉血作床旁血气分析。然后在气管导管与 Y 形接头之间加上自制的抗折压型气管导管延长管,不改变通气参数,10min 再进行同样的监测并记录。结果2种气道管理方式患儿的氧合都满意,增加延长管前后患儿血流动力学稳定,Pplat、Ppeak、Sp02、Pa02、P ET CO 2,PaCO 2等差异无统计学意义（P 〉0.05）。增加延长管后克服了导管口唇外露部分较少而与螺纹管连接后不能自然旋置的缺点。结论自制抗折压型气管导管延长管简单易做,不增加患儿气道阻力,可安全用于全麻下行脑瘫患儿俯卧位下手术的气道管理。展开更多
Computer model is developed for non-steady and steady-state process of thin-walled tube extension by the rigid punch with curved profile. Rigid-plastic membrane shell theory with quadratic yield criterion is used. Tub...Computer model is developed for non-steady and steady-state process of thin-walled tube extension by the rigid punch with curved profile. Rigid-plastic membrane shell theory with quadratic yield criterion is used. Tube material normal anisotropy, work hardening, wall thickness variation and friction effects are considered. FORTRAN programs of the model predict distributions of the thickness, meridian stress, yield stress and pressure along curved generator of deformed tube and the tube extension force versus punch displacement relation. Model predictions are correlated with experimental data.展开更多
文摘目的：探讨自制抗折压型气管导管延长管用于脑瘫患儿俯卧位下手术气道管理的效果和安全性。方法拟行功能性选择性脊神经后根切断术的脑瘫患儿25例,ASAⅠ～Ⅱ级,性别不限,年龄2～12岁,体重10～46kg。麻醉诱导插管后采用容量控制（VCV）通气。采用自身对照实脸,机械通气10min 后记录血压、SpO 2、P Et CO 2、气道压力峰值（P peak ）、平台压（P plat ）,采集桡动脉血作床旁血气分析。然后在气管导管与 Y 形接头之间加上自制的抗折压型气管导管延长管,不改变通气参数,10min 再进行同样的监测并记录。结果2种气道管理方式患儿的氧合都满意,增加延长管前后患儿血流动力学稳定,Pplat、Ppeak、Sp02、Pa02、P ET CO 2,PaCO 2等差异无统计学意义（P 〉0.05）。增加延长管后克服了导管口唇外露部分较少而与螺纹管连接后不能自然旋置的缺点。结论自制抗折压型气管导管延长管简单易做,不增加患儿气道阻力,可安全用于全麻下行脑瘫患儿俯卧位下手术的气道管理。
文摘Computer model is developed for non-steady and steady-state process of thin-walled tube extension by the rigid punch with curved profile. Rigid-plastic membrane shell theory with quadratic yield criterion is used. Tube material normal anisotropy, work hardening, wall thickness variation and friction effects are considered. FORTRAN programs of the model predict distributions of the thickness, meridian stress, yield stress and pressure along curved generator of deformed tube and the tube extension force versus punch displacement relation. Model predictions are correlated with experimental data.
