Implantable medical device
AssigneeBIOTRONIK SE & Co. KG
InventorsOlaf Skerl, Michael Lippert, Jens Kirchner
Life of this patent
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Abstract
An implantable medical device includes an integrated or connectable implantable three-dimensional acceleration sensor, and a ballistocardiogram (BCG) capturing unit that is connected or connectable to the acceleration sensor. The BCG evaluation unit processes an acceleration signal provided by the acceleration sensor and derives a BCG from the 3D accelerometer output signal. A BCG evaluation unit is connected to the BCG capturing unit, and is designed to evaluate a BCG provided by the BCG capturing unit and supply an output signal representing stroke volume.
Claims23
An implantable medical device including:
- a. an acceleration sensor;
- b. a pressure sensor;
- c. a BCG capturing unit configured to:
- (1) receive an acceleration signal from the acceleration sensor, and
- (2) derive a ballistocardiogram from the acceleration signal;
- and
- d. a BCG evaluation unit configured to supply:
- (1) an output signal representing a stroke volume, the output signal being dependent on the ballistocardiogram, and
- (2) an output signal representing a contractility measure for a left ventricle from the ballistocardiogram, wherein the contractility measure is derived from the rise of a J-wave from the ballistocardiogram;
- and
- e. an evaluation unit configured to determine temporal synchronization of:
- (1) the pressure signal, and
- (2) blood ejection indicated by the ballistocardiogram.
An implantable medical device including:
- a. a pressure sensor,
- b. an acceleration sensor,
- c. a BCG capturing unit configured to:
- (1) receive an acceleration signal from the acceleration sensor, and
- (2) derive a ballistocardiogram from the acceleration signal,
- d. a BCG evaluation unit configured to supply an output signal representing a stroke volume, the output signal being dependent on the ballistocardiogram, and
- e. an evaluation unit configured to determine temporal synchronization of:
- (1) the pressure signal, and
- (2) blood ejection indicated by the ballistocardiogram.
Dependencies are inferred from the claim text.