Movement monitoring systems and methods
AssigneeTrustees of Dartmouth College
InventorsRyan Chapman, Douglas Wayne Van Citters, Wayne Edward Moschetti, John-Erik Bell
Life of this patent
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Abstract
Systems and methods for monitoring a range of motion of a joint are described. For example, in one embodiment, a first set of sensors may sense accelerations of a first body portion located on a first side of the joint and a second set of sensors may sense accelerations of the second body portion located on a second opposing side of the joint. The acceleration data may then be used to compute the relative motion of the first and second body portions to determine movement of the joint. This joint movement may then be used to determine one or more range of motion movement metrics which are output for viewing by a subject or medical practitioner.
Claims30
A movement monitoring system comprising:
- a first set of sensors attachable to a first body portion associated with a first side of a joint;
- a second set of sensors attachable to a second body portion associated with a second side of the joint, wherein the first set of sensors sense at least one selected from the group of linear acceleration, rotational velocity, and orientation of the first body portion and the second set of sensors sense at least one selected from the group of linear acceleration, rotational velocity, and orientation of the second body portion;
- and
- at least one processor configured to:
- determine a movement metric for the joint of a subject with a first data set from the first set of sensors and a second data set from the second set of sensors;
- determine a difference between the determined movement metric and a standard movement metric;
- determine if intervention is needed for the subject based at least in part on the difference between the determined movement metric and the standard movement metric;
- and
- output an indication of whether or not intervention for the subject is needed.
A movement monitoring system comprising:
- a first set of sensors attachable to a first body portion associated with a first side of a joint;
- a second set of sensors attachable to a second body portion associated with a second side of the joint, wherein the first set of sensors sense at least one selected from the group of linear acceleration, rotational velocity, and orientation of the first body portion and the second set of sensors sense at least one selected from the group of linear acceleration, rotational velocity, and orientation of the second body portion;
- and
- at least one processor configured to determine movement of the first body portion relative to the second body portion, wherein above a threshold angular velocity the relative movement is determined primarily with first data from the first and second sets of sensors, and wherein below the threshold angular velocity the relative movement is determined primarily with second data from the first and second sets of sensors.
A movement monitoring system comprising:
- a first set of sensors attachable to a first body portion associated with a first side of a joint;
- a second set of sensors attachable to a second body portion associated with a second side of the joint, wherein the first set of sensors sense at least one selected from the group of linear acceleration, rotational velocity, and orientation of the first body portion and the second set of sensors sense at least one selected from the group of linear acceleration, rotational velocity, and orientation of the second body portion;
- and
- at least one processor configured to:
- distinguish portions of the first and second data sets corresponding to static events of the first and second body portions and events when the first and/or second sets of sensors have been removed;
- and
- truncate the first and second data sets to remove the portions of the first and second data sets corresponding to events when the first and/or second sets of sensors have been removed.
Dependencies are inferred from the claim text.