Hydrodynamic system for blood flow measurement

Hydrodynamische Anordnung zur Messung der Blutströmung

Système hydrodynamique destiné à la mesure de l'écoulement sanguin

Abstract

A device for blood flow measurement within a vascular vessel or within the heart comprises two transducers (2,3) mounted at the surface of a catheter (1). One (2) of the transducers has a protrusion (fixed or glued) with a hydrofoil profile (underwater wing), while the other transducer (3) has a cylindrical profile. On the hydrofoil transducer, the signal is generated by the surrounding quasi-static pressure and the drag force induced by the blood flow. On the other transducer, the signal is generated only by the quasi-static pressure. Either by connecting the transducers in a differential manner or by taking their signals to a differential amplifier, the signal caused by the axial flow velocity is obtained.

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Patent Citations (3)

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Cited By (3)

    Publication numberPublication dateAssigneeTitle
    US-6886411-B2May 03, 2005St. Jude Medical AbPiezoelectric sensor in a living organism for fluid pressure measurement
    WO-0228478-A1April 11, 2002St. Jude Medical AbDispositif medical implantable a organe de mesure de pression
    WO-0234130-A1May 02, 2002St. Jude Medical AbA piezoelectric sensor in a living organism for fluid pressure measurement.