Method, apparatus, computer program and system for measuring oscillatory motion
First Claim
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1. A method comprising:
- receiving a plurality of signals from at least one sensor sensing oscillatory motion, the plurality of signals being related to a plurality of measurements of a direction of a vector parameter, wherein the at least one sensor is either directly or indirectly coupled to a body part that undergoes oscillatory motion during respiration;
determining a predominant measured direction of the vector parameter based on the plurality of measurements;
determining a plurality of angles of rotation between;
individual measured directions of the vector parameter of corresponding ones of the plurality of measurements, andthe predominant measured direction of the vector parameter;
determining a plurality of angular velocities based on the plurality of angles of rotation;
monitoring values of the angular velocities;
defining a first band of range of angular velocity values where an angular velocity value is greater than a first threshold value;
defining a second band of range of angular velocity values where an angular velocity value is less than a second threshold value;
defining a third band of range of angular velocity values where an angular velocity value is between the first and second threshold values;
registering a count of a cycle of oscillatory motion upon determining monitored values of angular velocity undergoing four band transitions; and
determining, based on the angular velocities with reference to (i) a predetermined relationship between angular velocity values and cannula pressure values, and (ii) a predetermined relationship between the cannula pressure values and flow rate values for nasal breathing, one or more of;
a respiration pressure, a respiration flow rate, or an inspiratory flow.
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Abstract
A method, apparatus, computer program, system and device for measuring oscillatory motion comprising: receiving a plurality of signals related to a plurality of measurements of a direction of a vector parameter (at-1, at); determining a predominant measured direction of the vector parameter (āt) based on the plurality of measurements of the direction of the vector parameter; determining an angle of rotation (φt) between: a measured direction of the vector parameter (at) of one of the plurality of measurements of the direction of the vector parameter, and the predominant measured direction of the vector parameter (āt).
13 Citations
17 Claims
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1. A method comprising:
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receiving a plurality of signals from at least one sensor sensing oscillatory motion, the plurality of signals being related to a plurality of measurements of a direction of a vector parameter, wherein the at least one sensor is either directly or indirectly coupled to a body part that undergoes oscillatory motion during respiration; determining a predominant measured direction of the vector parameter based on the plurality of measurements; determining a plurality of angles of rotation between; individual measured directions of the vector parameter of corresponding ones of the plurality of measurements, and the predominant measured direction of the vector parameter; determining a plurality of angular velocities based on the plurality of angles of rotation; monitoring values of the angular velocities; defining a first band of range of angular velocity values where an angular velocity value is greater than a first threshold value; defining a second band of range of angular velocity values where an angular velocity value is less than a second threshold value; defining a third band of range of angular velocity values where an angular velocity value is between the first and second threshold values; registering a count of a cycle of oscillatory motion upon determining monitored values of angular velocity undergoing four band transitions; and determining, based on the angular velocities with reference to (i) a predetermined relationship between angular velocity values and cannula pressure values, and (ii) a predetermined relationship between the cannula pressure values and flow rate values for nasal breathing, one or more of;
a respiration pressure, a respiration flow rate, or an inspiratory flow. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An apparatus comprising:
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an input interface configured to receive a plurality of signals from at least one sensor for sensing oscillatory motion, the plurality of signals being related to a plurality of measurements of a direction of a vector parameter, wherein in use the at least one sensor is either directly or directly coupled to a body part that undergoes oscillatory motion during respiration; and a controller configured to; determine a predominant direction of the vector parameter based on the plurality of measurements; determine a plurality of angles of rotation between; individual measured directions of the vector parameter of corresponding ones of the plurality of measurements, and the predominant direction of the vector parameter; determine a plurality of angular velocities based on the plurality of angles of rotation; monitor values of the angular velocities; define a first band of range of angular velocity values where an angular velocity value is greater than a first threshold value; define a second band of range of angular velocity values where an angular velocity value is less than a second threshold value; define a third band of range of angular velocity values where an angular velocity value is between the first and second threshold values; register a count of a cycle of oscillatory motion upon determining monitored values of angular velocity undergoing four band transitions; and determine, based on the angular velocities with reference to (i) a predetermined relationship between angular velocity values and cannula pressure values, and (ii) a predetermined relationship between the cannula pressure values and flow rate values for nasal breathing, one or more of;
a respiration pressure, a respiration flow rate, or an inspiratory flow. - View Dependent Claims (16, 17)
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Specification