目的:利用生物电阻抗成像(EIT)技术探究不同自主呼吸训练方法对区域性肺通气的影响,以期为慢性阻塞性肺疾病(COPD)患者在训练标准及方法选取上提供行之有效的康复指导方案。方法:共纳入28名健康志愿者,取舒适站立位并进行:(1)平静呼吸;...目的:利用生物电阻抗成像(EIT)技术探究不同自主呼吸训练方法对区域性肺通气的影响,以期为慢性阻塞性肺疾病(COPD)患者在训练标准及方法选取上提供行之有效的康复指导方案。方法:共纳入28名健康志愿者,取舒适站立位并进行:(1)平静呼吸;(2)腹式呼吸;(3)缩唇呼吸;(4)腹式缩唇呼吸,每位被试的四种呼吸方式随机决定,整个过程中连续记录胸部EIT;分别对比四种呼吸方式期间的潮气量(TV)、呼气末肺阻抗(EELI)、通气中心(center of ventilation,Co V)、不均一指数(GI)、区域通气延迟(RVD)。结果:较平静呼吸,腹式呼吸、缩唇呼吸及腹式缩唇呼吸三种呼吸训练方法期间的TV明显增大(P<0.05);EELI明显降低(P<0.05);Co V明显减小(P<0.05,腹侧通气增多);腹式呼吸和腹式缩唇呼吸的GI明显减小(P<0.05,通气更均匀);缩唇呼吸和腹式缩唇呼吸RVD明显增加(P<0.05)。结论:腹式呼吸、缩唇呼吸、腹式缩唇呼三种呼吸训练方法均能有效增加肺通气量,减少肺功能残气量,但三种呼吸训练方法对肺通气的影响各不相同:缩唇呼吸通气向腹侧移动更显著(COV更小),区域通气延迟更显著(RVD更大),而腹式呼吸可改善通气均匀性(GI更小)。因此,从区域性肺通气的角度,建议COPD患者在进行呼吸训练时应腹式呼吸与缩唇呼吸独立交替进行,以达到更好的呼吸训练效果。展开更多
This paper discusses a mathematical model for a liquid phase reacting flow occurring at the cathode of a patent pending novel fuel cell geometry, where a non homogeneous catalysis carried by gold and Prussian Blue, wi...This paper discusses a mathematical model for a liquid phase reacting flow occurring at the cathode of a patent pending novel fuel cell geometry, where a non homogeneous catalysis carried by gold and Prussian Blue, with the first reducing air O2 and the second the resulting H2O2. The breathing zone is porous walls microtubes, with three different types of pores in its walls. Inside the microtuhes there is water solution of sulfuric acid. The microtubes possess an external layer of extremely porous polymer hydrophobic agent. A Prussian Blue thin porous layer is over the selective membrane. Appropriate porous and tubular connecting elements close the fluid loop. The asymmetry induces proper current and electric potential profiles, which leads to a mainly electrocapillary electrokinetic flow, which enhances the oxygen transport and assures the H2O2 flow to its reduction layer.展开更多
文摘目的:利用生物电阻抗成像(EIT)技术探究不同自主呼吸训练方法对区域性肺通气的影响,以期为慢性阻塞性肺疾病(COPD)患者在训练标准及方法选取上提供行之有效的康复指导方案。方法:共纳入28名健康志愿者,取舒适站立位并进行:(1)平静呼吸;(2)腹式呼吸;(3)缩唇呼吸;(4)腹式缩唇呼吸,每位被试的四种呼吸方式随机决定,整个过程中连续记录胸部EIT;分别对比四种呼吸方式期间的潮气量(TV)、呼气末肺阻抗(EELI)、通气中心(center of ventilation,Co V)、不均一指数(GI)、区域通气延迟(RVD)。结果:较平静呼吸,腹式呼吸、缩唇呼吸及腹式缩唇呼吸三种呼吸训练方法期间的TV明显增大(P<0.05);EELI明显降低(P<0.05);Co V明显减小(P<0.05,腹侧通气增多);腹式呼吸和腹式缩唇呼吸的GI明显减小(P<0.05,通气更均匀);缩唇呼吸和腹式缩唇呼吸RVD明显增加(P<0.05)。结论:腹式呼吸、缩唇呼吸、腹式缩唇呼三种呼吸训练方法均能有效增加肺通气量,减少肺功能残气量,但三种呼吸训练方法对肺通气的影响各不相同:缩唇呼吸通气向腹侧移动更显著(COV更小),区域通气延迟更显著(RVD更大),而腹式呼吸可改善通气均匀性(GI更小)。因此,从区域性肺通气的角度,建议COPD患者在进行呼吸训练时应腹式呼吸与缩唇呼吸独立交替进行,以达到更好的呼吸训练效果。
文摘This paper discusses a mathematical model for a liquid phase reacting flow occurring at the cathode of a patent pending novel fuel cell geometry, where a non homogeneous catalysis carried by gold and Prussian Blue, with the first reducing air O2 and the second the resulting H2O2. The breathing zone is porous walls microtubes, with three different types of pores in its walls. Inside the microtuhes there is water solution of sulfuric acid. The microtubes possess an external layer of extremely porous polymer hydrophobic agent. A Prussian Blue thin porous layer is over the selective membrane. Appropriate porous and tubular connecting elements close the fluid loop. The asymmetry induces proper current and electric potential profiles, which leads to a mainly electrocapillary electrokinetic flow, which enhances the oxygen transport and assures the H2O2 flow to its reduction layer.
