Correction of blood pressure measurements in invasive...

A - Human Necessities – 61 – B

Patent

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A61B 5/0215 (2006.01)

Patent

CA 2311535

The invention relates to a method for the correction of measured value falsifications in invasive pressure measurements with a fluid-filled system, in which the measured pressure is passed via the fluid--filled system to an external pressure transducer, which converts the pressure signal into an electrical signal. To provide a method and a device for invasive pressure measurement with fluid-filled systems which are improved with respect to the correction of measured value falsifications, are cost-effective and versatile in their use, the electrical signal is passed through an analog/digital converter and the digitized signal is fed to a signal analyzing and processing unit, which operates on the basis of a digital Fourier analysis. Furthermore, a heartbeat-related or segmental analysis is carried out and the signal is combined with empirically determined correction data on the basis of the analysis. The correction data are emitted as Fourier coefficients and the signal corrected by the signal analyzing and processing unit is passed to an output and/or evaluating unit.

Pour corriger des valeurs de mesure erronées lors d'une mesure de pression invasive, la pression mesurée est acheminée jusqu'à un convertisseur de pression externe (3) via un système rempli de liquide (1, 2). Le signal de sortie électrique du convertisseur de pression est acheminé par un convertisseur numérique/analogique (4) d'une unité de traitement de signaux (5) en vue de subir une analyse de Fourier numérique. Une analyse par coup et segment est également réalisée et, sur la base de cette analyse, le signal est lié à des données de correction calculées de façon empirique. Les données de correction sont données sous forme de coefficients de Fourier et le signal corrigé par l'unité de traitement des signaux (5) est acheminé jusqu'à une unité de sortie et/ou d'évaluation (6).

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