Patent ID: 9119580
Filing Date: 2015-09-01
Classification: A61B

Abstract:
1. A detection device for detecting a blood picture parameter of blood in a blood vessel, comprising: a transmitter, which is configured to couple a first transmission signal with a first frequency and a second transmission signal with a second frequency into the blood vessel; a receiver, which is configured to receive a first reception signal at the first frequency based on a reflection of the first transmission signal and a second reception signal at the second frequency based on reflection of the second transmission signal; a computer for detecting losses associated with the first and second transmission signals, which is configured to: ascertain a first loss variable on the basis of the first transmission signal and the first reception signal at the first frequency, the first loss variable indicating an electromagnetic excitation of blood in the blood vessel at the first frequency; and ascertain a second loss variable on the basis of the second transmission signal and the second reception signal at the second frequency, the second loss variable indicating an electromagnetic excitation of blood in the blood vessel at the second frequency; analyze loss variables from a plurality of transmitter and receiver detection configurations, and select an optimum detection configurations therefrom; a processor, which is configured to: ascertain a first frequency shift of the first loss variable relative to a first reference loss variable, the first frequency shift indicating a viscosity of the blood at the first frequency; ascertain a second frequency shift of the second loss variable relative to a second reference loss variable, the second frequency shift indicating a viscosity of the blood at the second frequency; and ascertain the blood picture parameter on the basis of the first frequency shift and the second frequency shift, the blood picture parameter indicating a concentration of a blood constituent in the blood; wherein the transmitter for coupling-in the first transmission signal or the second transmission signal comprises at least one transmission antenna, and wherein the receiver for receiving the first reception signal and the second reception signal comprises at least one reception antenna.