Assessing Cardiovascular Function Using an Optical Sensor
AssigneeGoogle Inc.
InventorsBrian Derek DeBusschere, Jeffrey L. Rogers
Life of this patent
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Abstract
This document describes assessing cardiovascular function using an optical sensor, such as through sensing relevant hemodynamics understood by pulse transit times, blood pressures, pulse-wave velocities, and, in more breadth, ballistocardiograms and pressure-volume loops. The techniques disclosed in this document use various optical sensors to sense hemodynamics, such as skin color and skin and other organ displacement. These optical sensors require little if any risk to the patient and are simple and easy for the patient to use.
Claims20
A computer-implemented method comprising:
- receiving, from one or more optical sensors, a first skin color or a first skin displacement captured at a first region of a patient and a second skin color or a second skin displacement captured at a second region of the patient;
- determining a circulatory distance between the first and second regions of the patient;
- determining a time correlation between capture of the first color or the first skin displacement and capture of the second color or the second skin displacement;
- and
- determining, based on the circulatory distance and the time correlation, a pulse-wave velocity for blood circulation through the patient.
A system comprising:
- one or more optical sensors capable of detecting skin color or skin displacement at two or more regions of a patient;
- a computer processor;
- and
- one or more computer-readable storage media having instructions stored thereon that, responsive to execution by the computer processor, performs operations comprising:
- receiving, from the one or more optical sensors, a first skin color or a first skin displacement captured at a first region of a patient and a second skin color or a second skin displacement captured at a second region of the patient;
- determining a circulatory distance between the first and second regions of the patient;
- determining a time correlation between capture of the first color or the first skin displacement and capture of the second color or the second skin displacement;
- and
- determining, based on the circulatory distance and the time correlation, a pulse-wave velocity for blood circulation through the patient.
One or more computer-readable storage media having instructions stored thereon that, responsive to execution by a computer processor, performs operations comprising:
- receiving, from one or more optical sensors, a first skin color or a first skin displacement captured at a first region of a patient and a second skin color or a second skin displacement captured at a second region of the patient;
- determining a circulatory distance between the first and second regions of the patient;
- determining a time correlation between capture of the first color or the first skin displacement and capture of the second color or the second skin displacement;
- and
- determining, based on the circulatory distance and the time correlation, a pulse-wave velocity for blood circulation through the patient.
Dependencies are inferred from the claim text.