It has been shown that remote monitoring of pulmonary activity can be achieved using ultra-wideband (UWB) systems, which shows promise in home healthcare,rescue,and security applications.In this paper,we first present...It has been shown that remote monitoring of pulmonary activity can be achieved using ultra-wideband (UWB) systems, which shows promise in home healthcare,rescue,and security applications.In this paper,we first present a multi-ray propagation model for UWB signal,which is traveling through the human thorax and is reflected on the air/dry-skin/fat/muscle interfaces,A geometry-based statistical channel model is then developed for simulating the reception of UWB signals in the indoor propagation environment.This model enables replication of time-varying multipath profiles due to the displacement of a human chest.Subsequently, a UWB distributed cognitive radar system (UWB-DCRS) is developed for the robust detection of chest cavity motion and the accurate estimation of respiration rate.The analytical framework can serve as a basis in the planning and evaluation of future rheasurement programs.We also provide a case study on how the antenna beamwidth affects the estimation of respiration rate based on the proposed propagation models and system architecture.展开更多
回顾性分析2017年1月至2018年6月在首都医科大学附属北京胸科医院重症医学科重症加强护理病房(intensive care unit.ICU)接受机械通气治疗的56例肺结核并发呼吸衰竭患者的呼吸机相关性肺炎发生情况、护理不良事件发生情况及治疗转归情...回顾性分析2017年1月至2018年6月在首都医科大学附属北京胸科医院重症医学科重症加强护理病房(intensive care unit.ICU)接受机械通气治疗的56例肺结核并发呼吸衰竭患者的呼吸机相关性肺炎发生情况、护理不良事件发生情况及治疗转归情况。在56例患者中.7. 1%(4/56)发生呼吸机相关性肺炎;12.5%(7/56)发生与气管插管相关的不良事件,均得到及时妥善处理;未出现呼吸道黏膜干燥和气道堵塞的患者。32例患者好转后转岀ICU,抢救成功率为57. 1%;死亡24例,死亡率为42.9%。研究认为,对肺结核并发呼吸衰竭患者采取气道管理方案,患者并发症发生率较低,对于改善患者预后有一定促进作用.展开更多
文摘It has been shown that remote monitoring of pulmonary activity can be achieved using ultra-wideband (UWB) systems, which shows promise in home healthcare,rescue,and security applications.In this paper,we first present a multi-ray propagation model for UWB signal,which is traveling through the human thorax and is reflected on the air/dry-skin/fat/muscle interfaces,A geometry-based statistical channel model is then developed for simulating the reception of UWB signals in the indoor propagation environment.This model enables replication of time-varying multipath profiles due to the displacement of a human chest.Subsequently, a UWB distributed cognitive radar system (UWB-DCRS) is developed for the robust detection of chest cavity motion and the accurate estimation of respiration rate.The analytical framework can serve as a basis in the planning and evaluation of future rheasurement programs.We also provide a case study on how the antenna beamwidth affects the estimation of respiration rate based on the proposed propagation models and system architecture.
文摘回顾性分析2017年1月至2018年6月在首都医科大学附属北京胸科医院重症医学科重症加强护理病房(intensive care unit.ICU)接受机械通气治疗的56例肺结核并发呼吸衰竭患者的呼吸机相关性肺炎发生情况、护理不良事件发生情况及治疗转归情况。在56例患者中.7. 1%(4/56)发生呼吸机相关性肺炎;12.5%(7/56)发生与气管插管相关的不良事件,均得到及时妥善处理;未出现呼吸道黏膜干燥和气道堵塞的患者。32例患者好转后转岀ICU,抢救成功率为57. 1%;死亡24例,死亡率为42.9%。研究认为,对肺结核并发呼吸衰竭患者采取气道管理方案,患者并发症发生率较低,对于改善患者预后有一定促进作用.
