公开(公告)号：US20100228143A1

公开(公告)日：2010-09-09

申请号：US12702590

申请日：2010-02-09

申请人： Eckhard TESCHNER ,  Ola STENQVIST

发明人： Eckhard TESCHNER ,  Ola STENQVIST

IPC分类号： A61B5/053

CPC分类号： A61B5/0536 ,  A61M16/0051 ,  A61M16/021

摘要： An apparatus for determining functional lung characteristics of a patient includes an electrical impedance tomography (EIT) imaging device adapted to record the impedance distribution within a plane of the thorax of the patient. The EIT imaging device includes a control and analysis unit for performing the impedance measurement and deriving the impedance distribution within the plane of the thorax. The control and analysis unit automatically performs steps including determining a global impedance change, defined as the impedance change with respect to an earlier measured reference impedance distribution integrated over the electrode plane, and recording the global impedance change curve as a function of time, performing breath detection in order to identify a breathing cycle, subdividing each breathing cycle to define a plurality of intratidal intervals, subdividing an EIT image from each interval into a plurality of regions of interest and calculating for each region of interest the ratio of the integrated impedance change within this region of interest to the global impedance change of this EIT image, for each intratidal interval presenting indications of the ratios determined for the regions of interest to provide an intratidal gas distribution representation for each interval.

摘要翻译： 用于确定患者的功能性肺特征的装置包括适于记录患者胸部平面内的阻抗分布的电阻抗断层摄影（EIT）成像装置。 EIT成像装置包括用于执行阻抗测量并导出在胸部平面内的阻抗分布的控制和分析单元。 控制和分析单元自动执行步骤，包括确定全局阻抗变化，其定义为相对于在电极平面上积分的较早测量的参考阻抗分布的阻抗变化，并记录全局阻抗变化曲线作为时间的函数，进行呼吸 检测以识别呼吸周期，细分每个呼吸周期以限定多个入内间隔，将每个间隔的EIT图像细分为多个感兴趣区域，并针对每个感兴趣区域计算积分阻抗变化的比率 该EIT图像的全局阻抗变化的感兴趣区域，对于每个intratidal间隔，呈现针对感兴趣区域确定的比率的指示，以提供针对每个间隔的intratidal气体分布表示。

公开(公告)号：US20070246047A1

公开(公告)日：2007-10-25

申请号：US11675872

申请日：2007-02-16

申请人： Eckhard TESCHNER ,  Dieter WEISMANN

发明人： Eckhard TESCHNER ,  Dieter WEISMANN

IPC分类号： A61M16/00

CPC分类号： A61B5/0536 ,  A61M16/022 ,  A61M2205/3569 ,  A61M2205/50 ,  A61M2230/65 ,  A61M2230/005

摘要： A process with a corresponding device for lung ventilation involves recording an image of the lung status with an electric impedance tomography (EIT) system (2) and the total area of ventilated lung areas is determined by a computing unit (4) from all image values, subsequently divided into at least two lung areas and the extent of the homogeneity of the ventilated lung areas is determined by comparison of the impedance changes within these areas. In case of a homogeneity rated as being too low, the respiration pressures are increased step by step by means of the respirator (1) and the respiration pressure at which the greatest possible homogeneity is obtained from subsequently determined status images is determined by means of the EIT system (2). The respiration pressure is subsequently lowered again by the respirator (1) until the computing unit (4) detects a reduction in the homogeneity of ventilated lung areas, so that the respiration pressure is subsequently increased again by means of the respirator (1) to the last value at which no reduction in the homogeneity of the ventilated lung areas occurred.

摘要翻译： 具有用于肺通气的相应装置的过程包括用电阻抗断层摄影（EIT）系统（2）记录肺状态的图像，并且通过计算单元（4）从所有图像值确定通气肺区域的总面积 ，随后分为至少两个肺部区域，通过比较这些区域内的阻抗变化来确定通气肺区域的均匀程度。 在均匀性被评定为太低的情况下，呼吸压力通过呼吸器（1）逐步增加，并且从后续确定的状态图像获得最大可能的均匀性的呼吸压力通过 EIT系统（2）。 呼吸压力随后由呼吸器（1）再次降低，直到计算单元（4）检测到通气肺区域的均匀性降低，使得呼吸压力随后通过呼吸器（1）再次增加到 发生通气肺部不均匀的最后一个值。

公开(公告)号：US20060260611A1

公开(公告)日：2006-11-23

申请号：US11277270

申请日：2006-03-23

申请人： Yvo GARBER ,  Hans MATTHIESSEN ,  Dieter WEISMANN ,  Eckhard TESCHNER

发明人： Yvo GARBER ,  Hans MATTHIESSEN ,  Dieter WEISMANN ,  Eckhard TESCHNER

IPC分类号： A62B7/00

CPC分类号： A61B5/0809 ,  A61B5/0536 ,  A61M16/024 ,  A61M2230/65

摘要： A device and a process for determining the change in the functional residual capacity (FRC) in a simple manner. Based on a first respiration phase for mechanical respiration, a recruitment maneuver is performed for this during a second respiration phase, and respiration is switched back to mechanical respiration during a third respiration phase. Reference values Uref/1, Uref/3 are formed from the end-expiratory values of the impedance measured signals U during the first respiration phase and the third respiration phase, and the difference ΔU (ΔFRC) between the reference value Uref/3 of the third respiration phase and the reference value Uref/1 of the first respiration phase is an indicator of the change in the functional residual capacity of the lung of the test subject.

摘要翻译： 用于以简单的方式确定功能剩余容量（FRC）的变化的装置和过程。 基于用于机械呼吸的第一呼吸阶段，在第二次呼吸阶段期间进行招募操作，并且在第三次呼吸阶段期间呼吸转换回机械呼吸。 在第一呼吸阶段和第三呼吸阶段期间，阻抗测量信号U的呼气终止值形成参考值U ref / 1，U ref / 3， 并且第三呼吸相位的参考值U SUB / 3 与第一呼吸相位的参考值U ref / 1 之间的差值DeltaU（DeltaFRC）是指示器 测试对象的肺功能残余容量的变化。

公开(公告)号：US20070246046A1

公开(公告)日：2007-10-25

申请号：US11675800

申请日：2007-02-16

申请人： Eckhard TESCHNER ,  Dieter WEISMANN

发明人： Eckhard TESCHNER ,  Dieter WEISMANN

IPC分类号： A62B7/00

CPC分类号： A61B5/0536 ,  A61M16/022 ,  A61M2205/3569 ,  A61M2205/50 ,  A61M2230/65 ,  A61M2230/005

摘要： A process and a device is presented with an electro-impedance tomography (EIT) system (2), with a computing unit (4) and with a respirator (1) for gentle mechanical lung ventilation especially in case of atelectases following surgical procedures. A first image of the healthy lungs is first recorded prior to anesthetization by means of the EIT system (2) and the total area and/or the spatial distribution of ventilated lung areas are determined from the image values by means of the computing unit (4). Second or additional status images are recorded after assumed lung damage and the total area and/or the spatial distribution of ventilated lung areas are determined. The total areas and/or the spatial distribution of the ventilated lung areas from the first and second or further status images are compared by means of the computing unit (4) and analyzed for the presence of lung areas that have no or reduced ventilation due to atelectases. The information on the presence, the extent and/or the spatial distribution of atelectases is sent by the EIT system (2) to the respirator (1) so that the respiration pressure is increased step by step by the respirator (1) as a function of the status image or the currently determined status images until the current image of the lung status corresponds to the first status image or comes close to it with minimal deviations. The respiration pressure is subsequently reduced again step by step by the respirator (1) until the computing unit (4) detects a reduction of the ventilated lung areas and the respiration pressure is subsequently increased again by means of the respirator (1) to the last value at which no change occurred in the ventilated lung areas.

摘要翻译： 具有电阻抗层析成像（EIT）系统（2），计算单元（4）和用于温和机械肺通气的呼吸器（1）的过程和装置，特别是在外科手术后选择的情况下。 健康肺部的第一张图像首先通过EIT系统（2）麻醉前记录，并且通过计算单元（4）从图像值确定通气肺区域的总面积和/或空间分布 ）。 假定肺损伤后记录第二次或其他状态图像，并确定通气肺区域的总面积和/或空间分布。 通过计算单元（4）比较来自第一和第二或其他状态图像的通气肺区域的总面积和/或空间分布，并分析由于计算单元（4）而没有或减少通气的肺部区域的存在，由于 选择。 关于选择的存在，程度和/或空间分布的信息由EIT系统（2）发送到呼吸器（1），使得呼吸压力由呼吸器（1）作为一个功能逐步增加 状态图像或当前确定的状态图像，直到肺状态的当前图像对应于第一状态图像或者以最小偏差接近它。 呼吸压力随后由呼吸器（1）逐步减少，直到计算单元（4）检测到通气的肺部区域的减少，并且呼吸压力随后通过呼吸器（1）再次增加到最后 通气肺部无变化的值。