Assessing cardiovascular function using an optical sensor
First Claim
Patent Images
1. A method comprising:
- receiving, by a computing device and from one or more optical sensors operatively coupled to the computing device, multiple images captured external to a patient by the one or more optical sensors over millisecond-range or faster timeframes, the multiple images recording a color or displacement corresponding to an organ or structure of the patient;
calculating at least one of a change in size, a change in volume, or a change in location of the organ or structure of the patient by;
analyzing the multiple images to determine the color or displacement corresponding to the organ or structure in different said images;
correlating the determined color or displacement with associated times of the different said images; and
comparing the determined color or displacement associated with different said times to determine at least one of a maximum, minimum, or median of the determined color or displacement across the multiple images;
determining, based on the calculated at least one change in size, volume, or location, at least one measurement indicative of cardiac function of the patient; and
displaying a user interface to present the at least one measurement.
2 Assignments
0 Petitions
Accused Products
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.
197 Citations
20 Claims
-
1. A method comprising:
-
receiving, by a computing device and from one or more optical sensors operatively coupled to the computing device, multiple images captured external to a patient by the one or more optical sensors over millisecond-range or faster timeframes, the multiple images recording a color or displacement corresponding to an organ or structure of the patient; calculating at least one of a change in size, a change in volume, or a change in location of the organ or structure of the patient by; analyzing the multiple images to determine the color or displacement corresponding to the organ or structure in different said images; correlating the determined color or displacement with associated times of the different said images; and comparing the determined color or displacement associated with different said times to determine at least one of a maximum, minimum, or median of the determined color or displacement across the multiple images; determining, based on the calculated at least one change in size, volume, or location, at least one measurement indicative of cardiac function of the patient; and displaying a user interface to present the at least one measurement. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A system comprising:
-
a processor; and a memory having stored thereon computer-readable instructions that are executable by the processor to perform operations comprising; receiving, from one or more optical sensors external to a patient, multiple images captured over millisecond-range or faster timeframes by the one or more optical sensors, the multiple images recording a color or displacement corresponding to an organ or structure of the patient; calculating at least one of a change in size, a change in volume, or a change in location of the organ or structure of the patient by; analyzing the multiple images to determine the color or displacement corresponding to the organ or structure in different said images; correlating the determined color or displacement with associated times of the different images; comparing the determined color or displacement associated with different said times; and determining at least one of a maximum, minimum, or median of the determined color or displacement across the multiple images based on the comparing; determining, based on the calculated at least one change in size volume, or location, at least one measurement indicative of cardiac function of the patient; and generating a user interface for display that is configured to present the at least one measurement. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
-
-
16. A method implemented by a computing device, the method comprising:
-
capturing multiple images external to a patient with one or more optical sensors operatively coupled to the computing device, the multiple images recording a color or displacement of at least one region of the patient that corresponds to an organ or structure of the patient; receiving, by the computing device and from one or more optical sensors, the multiple images; determining the color or displacement of the at least one region that corresponds to the organ or structure in different said images; correlating the determined color or displacement to associated times of the different said images; calculating at least one of a change in size, a change in volume, or a change in location of the organ or structure of the patient by comparing the determined color or displacement of the at least one region over the correlated times to determine at least one of a maximum, minimum, or median of the determined color or displacement of the at least one region across the multiple images; determining at least one measurement indicative of cardiac function of the patient based on the calculated at least one change in size, volume, or location; and displaying a user interface to present the at least one measurement. - View Dependent Claims (17, 18, 19, 20)
-
Specification