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1. WO1994004073 - BLOOD FLOW MONITORING SYSTEM

Publication Number WO/1994/004073
Publication Date 03.03.1994
International Application No. PCT/US1993/008105
International Filing Date 25.08.1993
Chapter 2 Demand Filed 25.03.1994
IPC
A61B 8/00 2006.01
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
8Diagnosis using ultrasonic, sonic or infrasonic waves
A61B 8/06 2006.01
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
8Diagnosis using ultrasonic, sonic or infrasonic waves
06Measuring blood flow
G01F 1/66 2006.01
GPHYSICS
01MEASURING; TESTING
FMEASURING VOLUME, VOLUME FLOW, MASS FLOW, OR LIQUID LEVEL; METERING BY VOLUME
1Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow
66by measuring frequency, phase shift, or propagation time of electromagnetic or other waves, e.g. ultrasonic flowmeters
CPC
A61B 8/06
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
8Diagnosis using ultrasonic, sonic or infrasonic waves
06Measuring blood flow
A61B 8/4281
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
8Diagnosis using ultrasonic, sonic or infrasonic waves
42Details of probe positioning or probe attachment to the patient
4272involving the acoustic interface between the transducer and the tissue
4281characterised by sound-transmitting media or devices for coupling the transducer to the tissue
G01F 1/663
GPHYSICS
01MEASURING; TESTING
FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
1Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow
66by measuring frequency, phaseshift, or propagation time of electromagnetic or other waves, e.g. ultrasonic flowmeters
663by measuring Doppler frequency shift
Applicants
  • ZERTL MEDICAL INC. [US]/[US]
  • LAUB, Glenn, W. [US]/[US]
Inventors
  • LAUB, Glenn, W.
Agents
  • WETTACH, Thomas, C.
Priority Data
07/935,52425.08.1992US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) BLOOD FLOW MONITORING SYSTEM
(FR) SYSTEME DE SURVEILLANCE DE FLUX SANGUIN
Abstract
(EN)
A blood flow monitoring system including a monitor (2), at least one sensor (48) securable to a patient's skin, and an electrical cable (46) connecting the sensor to the monitor. The monitor generates an electrical signal corresponding to a first acoustic frequency, processes electrical input signals corresponding to a second (doppler-shifted) acoustic frequency, and displays a patient's blood flow characteristics based upon the input signals. The monitor may determine and display a patient's blood flow characteristics based on an idealized normalized absolute (INAF) scale or a pulse palpitation equivalents (PPE) scale. The sensor preferably includes a substrate (66A) having circuit elements (68A) thereon for conducting electricity, at least one transducer element (72) for transmitting the output signals to a patient's blood vessel and receiving input signals reflected therefrom. The sensor is releasably secured by adhesive (100) or the like, to the patient's skin and is preferably disposable, i.e. detachably connected to the cable (46).
(FR)
Un système de surveillance de flux sanguin comporte un appareil de contrôle (2), au moins un capteur (48) qu'on peut fixer à la peau du patient, et un câble électrique (46) reliant le capteur à l'appareil de contrôle. Ce dernier engendre un signal électrique correspondant à une première fréquence acoustique, traite les signaux électriques d'entrée correspondant à une seconde fréquence acoustique (à déplacement Doppler) et affiche les caractéristiques de flux sanguin d'un patient basées sur les signaux d'entrée. Cet appareil de contrôle peut déterminer et afficher les caractéristiques de flux sanguin d'un patient en fonction d'une échelle de flux absolu normalisé idéal ou d'une échelle d'équivalence pouls-palpitation. Le capteur comporte de préférence un substrat (66A) supportant des éléments de circuit (68A) chargés de conduire l'électricité et au moins un transducteur (72) chargé de transmettre les signaux de sortie au vaisseau sanguin d'un patient et d'en recevoir les signaux d'entrée réfléchis. Ce capteur se fixe de manière réversible par exemple avec un adhésif (100) sur la peau du patient et il est de préférence jetable, c'est-à-dire relié de manière détachable au câble (46).
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