Sensor device, system, and method for performing an absolute blood pressure measurement
AssigneeAit Austrian Institute of Technology GmbH
InventorSiegfried Wassertheurer
Life of this patent
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Abstract
A sensor device or system for performing a blood pressure measurement comprises a finger abutment surface, a first sensor operative to sense blood volume pulses in a finger pressed on the finger abutment surface, a second sensor operative to sense a force or pressure with which the finger is pressed on the finger abutment surface, and processing circuitry operative to process amplitudes of the sensed blood volume pulses and the sensed force or pressure with which the finger is pressed on the finger abutment surface to determine an absolute blood pressure.
Claims17
A sensor system for performing a blood pressure measurement, comprising:
- a finger abutment surface;
- a first sensor operative to sense blood volume pulses in a finger pressed on the finger abutment surface;
- a second sensor operative to sense a force or pressure with which the finger is pressed on the finger abutment surface;
- an electrocardiogram (ECG) sensor operative to sense ECG signals while the first sensor concurrently senses the blood volume pulses;
- and
- processing circuitry operative to:
- process amplitudes of the sensed blood volume pulses and the sensed force or pressure with which the finger is pressed on the finger abutment surface to determine an absolute blood pressure,
- process an output of an ECG sensor and of the first sensor to determine pulse transit times (PTTs) of the blood volume pulses and to process the PTTs to determine a change in blood pressure, and
- generate user instructions for adjusting the force or pressure based on the determined PTTs;
- wherein the sensor system is configured to estimate at least one of a systolic blood pressure and a diastolic blood pressure and generate the user instructions that direct the user to change the pressure or force applied by the finger against the finger abutment surface based on the blood pressure estimate(s) obtained from the PTT-based blood pressure monitoring.
A method of performing a blood pressure measurement, comprising:
- receiving a first sensor output representing sensed blood volume pulses in a finger pressed on a finger abutment surface;
- receiving a second sensor output representing a sensed force or pressure with which the finger is pressed on the finger abutment surface;
- receiving ECG signals sensed while the first sensor concurrently senses the blood volume pulses;
- processing, by processing circuitry, amplitudes of the sensed blood volume pulses and the sensed force or pressure to determine an absolute blood pressure;
- processing, by the processing circuitry, the ECG signals and the first sensor output to determine pulse transit times, PTTs, of the blood volume pulses;
- processing, by the processing circuitry, the PTTs to determine a change in blood pressure;
- and
- estimating at least one of a systolic blood pressure and a diastolic blood pressure;
- generating, by the processing circuitry, user instructions that direct the user to change the pressure or force applied by the finger against the finger abutment surface based on the blood pressure estimate(s) obtained from the PTT-based blood pressure monitoring.
Dependencies are inferred from the claim text.