公开(公告)号：US08271085B2

公开(公告)日：2012-09-18

申请号：US11970662

申请日：2008-01-08

申请人： Michael Lippert ,  Olaf Skerl ,  Stefan Paule ,  Bernhard Fahn ,  Gerald Czygan ,  Heinrich Reinke ,  Albrecht Urbaszek

发明人： Michael Lippert ,  Olaf Skerl ,  Stefan Paule ,  Bernhard Fahn ,  Gerald Czygan ,  Heinrich Reinke ,  Albrecht Urbaszek

IPC分类号： A61N1/365

CPC分类号： A61B5/053 ,  A61B5/0538 ,  A61B5/14535 ,  A61B5/7207

摘要： An implantable medical device has an impedance or admittance determination unit, an alternating current or voltage source, a measuring unit, and an analysis unit which is connected to the alternating current or AC voltage source and the measuring unit to calculate an impedance value or an admittance value at different times. The impedance or admittance determination unit may generate measuring current having two different frequencies (preferably below 100 kHz), and the analysis unit may calculate pairs of impedance or admittance values which are chronologically assigned to one another for different frequencies of the measuring current, and calculate a value for a blood impedance or blood admittance component which is independent of the impedance of the body tissue surrounding a particular blood vessel, The analysis unit may also determine trends in this value over time as an indicator for a change of blood hematocrit value.

摘要翻译： 可植入医疗装置具有阻抗或导纳确定单元，交流或电压源，测量单元和分析单元，其连接到交流电压源或交流电压源和测量单元以计算阻抗值或导纳 价值在不同的时间。 阻抗或导纳确定单元可以产生具有两个不同频率（优选低于100kHz）的测量电流，并且分析单元可以计算针对测量电流的不同频率按时间顺序分配给彼此的阻抗或导纳值对，并且计算 血液阻抗或血液导入分量的值，其独立于围绕特定血管的身体组织的阻抗。分析单元还可以确定该值随时间的趋势作为血液血细胞比容值变化的指标。

公开(公告)号：US20080195162A1

公开(公告)日：2008-08-14

申请号：US11970662

申请日：2008-01-08

申请人： Michael Lippert ,  Olaf Skerl ,  Stefan Paule ,  Bernhard Fahn ,  Gerald Czygan ,  Heinrich Reinke ,  Albrecht Urbaszek

发明人： Michael Lippert ,  Olaf Skerl ,  Stefan Paule ,  Bernhard Fahn ,  Gerald Czygan ,  Heinrich Reinke ,  Albrecht Urbaszek

IPC分类号： A61B5/053 ,  A61N1/362

CPC分类号： A61B5/053 ,  A61B5/0538 ,  A61B5/14535 ,  A61B5/7207

摘要： An implantable medical device has an impedance or admittance determination unit, an alternating current or voltage source, a measuring unit, and an analysis unit which is connected to the alternating current or AC voltage source and the measuring unit to calculate an impedance value or an admittance value at different times. The impedance or admittance determination unit may generate measuring current having two different frequencies (preferably below 100 kHz), and the analysis unit may calculate pairs of impedance or admittance values which are chronologically assigned to one another for different frequencies of the measuring current, and calculate a value for a blood impedance or blood admittance component which is independent of the impedance of the body tissue surrounding a particular blood vessel, The analysis unit may also determine trends in this value over time as an indicator for a change of blood hematocrit value.

摘要翻译： 可植入医疗装置具有阻抗或导纳确定单元，交流或电压源，测量单元和分析单元，其连接到交流电压源或交流电压源和测量单元以计算阻抗值或导纳 价值在不同的时间。 阻抗或导纳确定单元可以产生具有两个不同频率（优选低于100kHz）的测量电流，并且分析单元可以计算针对测量电流的不同频率按时间顺序分配给彼此的阻抗或导纳值对，并且计算 血液阻抗或血液导入分量的值，其独立于围绕特定血管的身体组织的阻抗。分析单元还可以确定该值随时间的趋势作为血液血细胞比容值变化的指标。