Multispectral optical finger system for physiological measurements
AssigneeThe Texas A&M University System
InventorsKimberly Branan, Gerard L. Cote, Justin Mcmurray
Life of this patent
Estimating the term…
Abstract
Wearable optical devices, methods and systems for obtain dynamic and static physiological parameters from a subject are disclosed. Example devices can be worn around an appendage, such as a finger, and utilize PPG sensors to obtain signals from the appendage. The PPG sensors are positioned to acquire signals suitable to reconstruct an image of the inner appendage using, for example, diffuse optical tomography, to provide additional information. The devices, methods, and systems can obtain dynamic and static physiological parameters and accurate images in real-time.
Claims20
A wearable optical device comprising
- a ring configured to surround an appendage of a user and including a stationary section and a rotatable section rotatably coupled to the stationary section, the ring defining an outer surface and an inner surface opposite the outer surface adapted to face toward a skin surface of the appendage, and
- a plurality of sensor assemblies disposed circumferentially about the inner surface of the ring and configured to measure physiological signals of the user,
- wherein, in response to movement of the rotatable section of the ring relative to the stationary section of the ring, the wearable optical device is configured to move between (i) an open configuration in which the plurality of sensor assemblies moves outwardly away from a centerpoint of the ring to be disposed proximal to the inner surface of the ring and (ii) a closed configuration in which the plurality of sensor assemblies moves inwardly toward the centerpoint of the ring, wherein the movement of the rotatable section is configured to cause radial displacement of the plurality of sensor assemblies,
- wherein each of the plurality of sensor assemblies includes a sensor interface and at least one tension spring separate from the rotatable section and coupled to the sensor interface, the at least one tension spring configured to urge the corresponding sensor assembly toward the skin surface of the appendage.
A method comprising
- providing a ring configured to surround an appendage of a user, the ring including a stationary section and a rotatable section rotatably coupled to the stationary section,
- coupling a plurality of sensor assemblies circumferentially about an inner surface of the ring,
- rotating the rotatable section of the ring relative to the stationary section of the ring in a first direction to cause the plurality of sensor assemblies to move radially outwardly away from a centerpoint of the ring to be disposed proximal to the inner surface of the ring,
- rotating the rotatable section of the ring relative to the stationary section of the ring in a second direction opposite the first direction to cause the plurality of sensor assemblies to move radially inwardly toward the centerpoint of the ring,
- measuring physiological signals of the user with the plurality of sensor assemblies,
- receiving signals from each of the plurality of sensor assemblies, and
- based on the received signals, generating data that is suitable for conducting 2D or 3D diffuse optical tomography on the appendage.
Dependencies are inferred from the claim text.