Procedure for precise determination of velocity of a liquid, in particular of aortic flow using an intracorporal probe

Procedure for precise determination of velocity of a liquid, in particular of aortic flow using an intracorporal probe

The probe according to the invention comprises: - at least one ultrasonic transducer (4) with wide beam (4a), fixed on a support block (3) making it possible to measure, by Doppler effect, the velocity of a moving target (11), - at least one ultrasonic transducer (5) with a narrow beam (5a), fixed o...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: MUCHADA, RAOUL, LAVANDIER,,BERNARD, CATHIGNOL, DOMINIQUE
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
DIAGNOSIS
HUMAN NECESSITIES
HYGIENE
IDENTIFICATION
INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
MEASURING
MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION,OR SHOCK
MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUIDLEVEL
MEDICAL OR VETERINARY SCIENCE
METERING BY VOLUME
PHYSICS
SURGERY
TESTING
Online-Zugang:Volltext bestellen
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:The probe according to the invention comprises: - at least one ultrasonic transducer (4) with wide beam (4a), fixed on a support block (3) making it possible to measure, by Doppler effect, the velocity of a moving target (11), - at least one ultrasonic transducer (5) with a narrow beam (5a), fixed on a support block (3) and whose beam is in a known relative position with respect to that of the wide beam (4a), - and a control and processing unit (8) comprising means (14,15) for measuring and processing characteristics of the signal from the narrow-beam transducer (5), in order to determine the only suitable orientation of the wide-beam transducer which allows exact measurement of the flow rate. La sonde selon l'invention comporte: au moins un transducteur ultrasonore (4) à faisceau large (4a), fixé sur un bloc-support (3) permettant de mesurer, par effet Doppler, la vitesse d'une cible mobile (11), au moins un transducteur ultrasonore (5) à faisceau étroit (5a), fixé sur un bloc-support (3) et dont le faisceau se trouve dans une position relative connue par rapport à celle du faisceau large (4a), et une unité de commande et de traitement (8) comprenant des moyens (14, 15) de mesure et de traitement des caractéristiques du signal du transducteur à faisceau étroit (5), afin de déterminer la seule orientation convenable du transducteur à faisceau large qui puisse permettre une mesure exacte du débit.