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1. (WO2018025050) ULTRASOUND BLOOD-FLOW MONITORING

Pub. No.:    WO/2018/025050    International Application No.:    PCT/GB2017/052309
Publication Date: Fri Feb 09 00:59:59 CET 2018 International Filing Date: Sat Aug 05 01:59:59 CEST 2017
IPC: A61B 8/06
A61B 8/08
A61B 8/00
Applicants: NORWEGIAN UNIVERSITY OF SCIENCE AND TECHNOLOGY (NTNU)
WILSON, Timothy James
Inventors: TORP, Hans
HERGUM, Torbjørn
Title: ULTRASOUND BLOOD-FLOW MONITORING
Abstract:
A system (1) for monitoring blood flow in a patient (5) comprises a first unit (2) having an ultrasound transducer and a fastener for fastening the unit to the patient. A controller subsystem comprises the first unit (2) and a separate second unit (3, 4). The controller subsystem (2, 3, 4) is configured to: control the ultrasound transducer to transmit plane-wave pulses into the patient (5) in a propagation direction;sample reflections of the plane-wave pulses, received at the ultrasound transducer, from a region (13) within the patient (5), to generate pulse-Doppler response signals; and process the pulse-Doppler response signals to estimate a series of values, over time, of a measure proportional, but not equal, to the total blood volume flow passing through the region (13). A monitoring subsystem (3, 4) is configured to monitor the series of values over time and to generate a signal if a set of one or more of the values satisfies a predetermined criterion.