PHYSIOLOGICAL MONITORING SYSTEM FEATURING FLOORMAT AND WIRED HANDHELD SENSOR
First Claim
1. A biometric sensor system configured to measure a physiological parameter, comprising:
- a first device comprising a generally flat Floormat configured to rest stably on a generally flat surface and to support the weight of a user standing thereon, the Floormat including a weight-measuring system comprising at least one load cell and an amplifier system configured to measure a time-dependent load-cell voltage from at least one load cell and to process the time-dependent load-cell voltage to determine a time-dependent load-cell waveform;
a second device connected to the Floormat via a cable having one or more electrical conductors disposed therein and comprising a Handheld Sensor configured to be supported at a region of one of the user'"'"'s hands, the Handheld Sensor including;
a grip member by means of which the user can grasp and support the Handheld Sensor; and
a finger-receiving portion comprising an opening, configured and arranged to receive a finger of the hand with which the user grasps the Handheld Sensor, and an optical system, the optical system comprising a first light source configured to irradiate the received finger and a photodetector configured to receive radiation after it irradiates the received finger;
a first analog system located in the Floormat that is configured to receive signals from the photodetector, via said one or more conductors, and to process them to generate a time-dependent photoplethysmogram waveform comprising first pulsatile signals; and
a processing system configured to receive the photoplethysmogram waveform and at least one additional time-dependent physiological waveform and to collectively process the waveforms to determine a pulse transit time.
1 Assignment
0 Petitions
Accused Products
Abstract
A physiological monitoring system features a Floormat and Handheld Sensor connected by a cable. A user stands on the Floormat and grips the Handheld Sensor. These components measure time-dependent physiological waveforms from a user over a conduction pathway extending from the user'"'"'s hand or wrist to their feet. The Handheld Sensor and Floormat use a combination of electrodes that inject current into the user'"'"'s body and collect bioelectric signals that, with processing, yield ECG, impedance, and bioreactance waveforms. Simultaneously, the Handheld Sensor measures photoplethysmogram waveforms with red and infrared radiation and pressure waveforms from the user'"'"'s fingers and wrist, while the Floormat measures signals from load cells to determine ‘force’ waveforms to determine the user'"'"'s weight, and ballistocardiogram waveforms to determine parameters related to cardiac contractility. Processing these waveforms with algorithms running on a microprocessor yield the vital sign, hemodynamic, and biometric parameters.
-
Citations
27 Claims
-
1. A biometric sensor system configured to measure a physiological parameter, comprising:
-
a first device comprising a generally flat Floormat configured to rest stably on a generally flat surface and to support the weight of a user standing thereon, the Floormat including a weight-measuring system comprising at least one load cell and an amplifier system configured to measure a time-dependent load-cell voltage from at least one load cell and to process the time-dependent load-cell voltage to determine a time-dependent load-cell waveform; a second device connected to the Floormat via a cable having one or more electrical conductors disposed therein and comprising a Handheld Sensor configured to be supported at a region of one of the user'"'"'s hands, the Handheld Sensor including; a grip member by means of which the user can grasp and support the Handheld Sensor; and a finger-receiving portion comprising an opening, configured and arranged to receive a finger of the hand with which the user grasps the Handheld Sensor, and an optical system, the optical system comprising a first light source configured to irradiate the received finger and a photodetector configured to receive radiation after it irradiates the received finger; a first analog system located in the Floormat that is configured to receive signals from the photodetector, via said one or more conductors, and to process them to generate a time-dependent photoplethysmogram waveform comprising first pulsatile signals; and a processing system configured to receive the photoplethysmogram waveform and at least one additional time-dependent physiological waveform and to collectively process the waveforms to determine a pulse transit time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
-
Specification