公开(公告)号：WO1999007281A1

公开(公告)日：1999-02-18

申请号：PCT/US1997017897

申请日：1997-10-01

Applicant: REINING INTERNATIONAL LTD.

Inventor： REINING INTERNATIONAL LTD. ,  REINING, William, N. ,  BELL, Marshall, J.

IPC: A61B05/113

CPC classification number: A61B5/1135

Abstract: A conductance sensor uses an auto-tuning oscillator to drive a coil inducing eddy currents in a substance to be measured. The auto-tuning oscillator precisely controls the amplitude of oscillations to eliminate amplitude-dependent effects. The coil may be used to sense the presence of a conducting fluid in a nonconducting pipe or the proximity of a metallic object to the coil. The coil may be used in a cardiac or respiratory monitor having a fixed loop conductor. Monitoring changes in the conductivity of a subject provides a measure of cardiac or respiratory motion.

Abstract translation: 电导传感器使用自动调谐振荡器来驱动线圈，在待测物质中产生涡流。 自动调谐振荡器精确地控制振荡的幅度，以消除与幅度有关的影响。 线圈可以用于感测导电流体在不导电管中的存在或金属物体与线圈的接近。 线圈可以用于具有固定回路导体的心脏或呼吸监测器中。 监测受试者的电导率变化提供心脏或呼吸运动的量度。

公开(公告)号：WO1996001586A1

公开(公告)日：1996-01-25

申请号：PCT/US1995008856

申请日：1995-06-23

Applicant: REINING INTERNATIONAL LTD.

Inventor： REINING INTERNATIONAL LTD. ,  REINING, William, N.

IPC: A61B05/05

CPC classification number: A61B5/029 ,  A61B5/0295 ,  A61B5/0535

Abstract: An impedance cardiograph (10) which determines cardiac output from a measurement of variations of chest impedance (2), provides method of calculating the effect of patient volume on the measurement from measurable patient height (H) and chest circumference (C), and provides a correction process that identifies as a source of error variations in the first derivative of impedance. This latter source of error is minimized by preprocessing the impedance derivative value with a compression function which reduces the range of values of the impedance derivative when that value differs significantly from a norm of the population.

Abstract translation: 根据测量胸部阻抗变化（2）确定心输出量的阻抗心电图仪（10）提供了从可测量的患者身高（H）和胸围（C）计算患者体积对测量的影响的方法，并提供 校正过程，其识别阻抗的一阶导数中的误差源。 通过用压缩函数预处理阻抗导数值来最小化后一种误差源，当压缩导数值与群体规范明显不同时，减小阻抗导数的值的范围。