公开(公告)号：WO1993010705A1

公开(公告)日：1993-06-10

申请号：PCT/US1991008941

申请日：1991-11-27

Applicant: INNERSPACE, INC.

Inventor： INNERSPACE, INC. ,  BECKMAN, Bruce

IPC: A61B05/02

CPC classification number: A61B5/14553 ,  A61B5/031

Abstract: A catheter assembly for measuring a fluid pressure in a body cavity includes an optical converter (39) responsive to an electrical power source for energizing a light-emitting diode (45) which has drift characteristics which vary in response to temperature. An optical sensor (72) is adapted to receive the light from the light-emitting diode and to provide a measurement signal indicative of the fluid pressure in the cavity. This measurement signal has undesirable characteristics related to the thermal drift characteristics of the diode. A detection circuit (93, 109) detects the measurement signal and provides an output signal indicative of fluid pressure in the cavity. A special filter (63) is included in this detection circuit which has optical characteristics that substantially offset the undesirable characteristics of the measurement signal, so that the output signal is substantially independent of the temperature of the diode. A power conversion (36) circuit enables the assembly to be energized by an excitation voltage which is provided in several different forms by various monitors.

Abstract translation: 用于测量体腔内的流体压力的导管组件包括响应于电源的光学转换器（39），用于激励具有随温度变化的漂移特性的发光二极管（45）。 光学传感器（72）适于接收来自发光二极管的光并提供指示空腔中的流体压力的测量信号。 该测量信号具有与二极管的热漂移特性相关的不期望的特性。 检测电路（93,109）检测测量信号，并提供指示空腔中的流体压力的输出信号。 该检测电路中包括一个特殊的滤波器（63），其具有基本上抵消测量信号的不良特性的光学特性，使得输出信号基本上与二极管的温度无关。 电源转换（36）电路使得组件能够被各种监视器以几种不同形式提供的激励电压激励。