Method and Aparatus for Presenting Information Concerning Flow Behavior of a Bodyfluid Externally Measured by Ultrasound
AssigneeKoninklijke Philips Electronics N.V.
InventorsEric Cohen-Solal, Shervin Ayati, Balasundara Iyyavu Raju
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Abstract
A flow behavior monitor for presenting ultrasound measurements of an indicia of flow behavior of a fluid in a subject. The indicia of flow behavior are calculated for several frequency slices within a Doppler signal power spectrum and these indicia may be used to determine pulsatility and/or blood flow, as well as other parameters of flow behavior. Because of the robust nature of the calculated indicia, the flow behavior monitor has particular use in an Automated or Semi-Automated External Defibrillator (AED) for determining whether to defibrillate a patient
Claims38
A monitor for presenting results of non-invasively measuring and/or detecting, using an ultrasound device, flow behavior of a fluid within a subject, comprising:
- means for presenting at least one of visual and audio output representing at least one measurement of an indicia of flow behavior of the fluid;
- wherein total Doppler power is calculated for each of a plurality of frequency slices as a function of time from an ultrasound signal backscattered from the fluid within the subject;
- wherein power spectra are calculated for each of the plural frequency slices from the determined total Doppler power for each of the plural frequency slices;
- wherein the indicia of flow behavior is calculated for each frequency slice from at least one of the total Doppler power and the power spectrum for that frequency slice;
- and
- wherein at least one of the calculated values of the indicia of flow behavior is used to produce the at least one measurement of the indicia of flow behavior presented by the means for presenting.
A system for presenting results of non-invasively measuring a flow behavior of a fluid within a subject using an ultrasound device, comprising:
- processing means operative for:
- determining a total Doppler power for each of a plurality of frequency slices as a function of time, wherein said total Doppler power is calculated from an ultrasound signal backscattered from the fluid within the subject;
- determining power spectra from the determined total Doppler power whereby each of the plural frequency slices has a power spectrum over the frequencies within that frequency slice;
- and
- calculating a first indicia of flow behavior of the fluid within the subject for each frequency slice;
- visual output means for presenting a Doppler spectral trace, wherein the current measurement of the first indicia of flow behavior is represented by a color of the Doppler spectral trace;
- and
- audio output means for output of a second indicia of flow behavior, wherein a user of the system can listen to flow behavior of the fluid within the subject.
Dependencies are inferred from the claim text.