Patent ID: 6425866
Filing Date: 2002-07-30
Classification: A61B,Y10S

Abstract:
A device for embolus detection by means of ultrasonic signals which are reflected at a flow of fluid in a body, comprising:an ultrasonic unit which is adapted for periodically producing ultrasonic monitoring signals for a suitably designed ultrasonic transmitting device and for receiving a first signal reflected at a first position corresponding to the flow of fluid in a vessel; a signal evaluation unit which is connected downstream of the ultrasonic unit for preparing and visually and/or acoustically providing the reflected first signal; a detector unit which co-operates with the signal evaluation unit and which is adapted to detect an embolus in the flow of fluid and to output a detection signal as a reaction thereto; wherein the ultrasonic unit is designed for additionally receiving a second signal from the ultrasonic transmitting device, which is reflected at a second position in the body that lies outside the vessel and the flow fluid; and the detector unit is designed to detect an embolus as a reaction to the first and the second signal in such a way that output of the detection signal occurs only if a characteristic signal change, corresponding to a possible embolus, in one of the first and second signals occurs outside a minimum time interval from a signal change in the respective other signal, or the characteristic signal change occurs in only one of the signals.