Method for establishing and/or monitoring the state of an extracorporeal fluid or fluid flow by means of ultrasound
AssigneeGAMPT mgH Gesellschaft fur Angewandte Medizinische Physik und Technik
InventorsMichael Schultz, Robert Klaua, Georg Dietrich, Anton Schlesinger
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Abstract
The invention relates to a method for establishing and/or monitoring foreign structures in an extracorporeal fluid or in a fluid flow, in particular in blood or a bloodstream, wherein the fluid is monitored by means of ultrasound. The method according to the invention is characterized in that the features of the fluid state established by means of the ultrasound monitoring are processed by means of a multi-criteria ultrasonic analysis. The invention furthermore relates to a device for performing this method and the use of this device.
Claims21
A method for establishing and/or monitoring the state of an extracorporeal fluid or of an extracorporeal fluid flow, wherein the fluid is monitored by means of ultrasound, wherein the extracorporeal fluid or the extracorporeal fluid flow is subjected to time-harmonic mechanical and/or transient mechanical excitation and produced ultrasonic backscattering signal is analyzed in terms of Doppler frequency shifting and elastography, features of the state of the extracorporeal fluid established by means of ultrasonic monitoring are processed with a multi-criteria ultrasonic analysis, in particular an analysis algorithm, by which a change in the distribution of particles contained in the fluid and changes in the viscosity of the fluid are measured by means of ultrasound and the fluid state is assigned to previously defined states.
A device for monitoring state of an extracorporeal fluid flow comprising at least one ultrasonic monitoring means and at least one signal analysis means, wherein the extracorporeal fluid flow, in particular the extracorporeal bloodstream, is subjected to time-harmonic mechanical and/or transient mechanical excitation and the ultrasonic backscattering signal is analyzed in terms of Doppler frequency shifting and elastography, the features of the state of the extracorporeal fluid, particularly of the state of extracorporeal blood, established by means of the ultrasonic monitoring are processed with an analysis algorithm, by which changes in the distribution of particles, in particular blood constituents, contained in the extracorporeal fluid and changes in the viscosity of the extracorporeal fluid, in particular of extracorporeal blood, are measurable by means of ultrasound and the state of the extracorporeal fluid, in particular of the extracorporeal blood, is assignable to previously defined states, in particular to coagulation states.
20-22. (canceled)
A device for monitoring state of an extracorporeal fluid which comprises
- a conduit for extracorporeal fluid;
- an ultrasonic transducer operably associated with the conduit;
- an ultrasonic back scattering detector operably associated with the conduit;
- and
- a multi-criteria signal analyzer operably associated with the ultrasonic back scattering detector.
Dependencies are inferred from the claim text.