Device and method for determining a respiration rate
First Claim
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1. A method for determining a respiration rate of a subject, the method comprising the steps of:
- measuring a first estimation of the respiration rate in a first way with a first sensor;
measuring a second estimation of the respiration rate in a second way with a second sensor, said first sensor and said second sensor sensing a different physical characteristic;
setting by means of a control unit one quality value for each of the first and second estimations of the respiration rate;
determining a difference by means of the control unit between said first and second estimation of the respiration rate;
determining by means of the control unit if said difference is greater or less than 20%;
if said difference is less than 20%, then determining by means of the control unit a third estimation of the respiration rate of the subject by use of weighted averaging based on the first and second estimations of the respiration rate and their respective quality values; and
if said difference is greater than 20%, then choosing one of the first and second estimations of the respiration rate with the highest quality value as an actual respiration rate of the subject.
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Abstract
A device (1) and a corresponding method are provided for determining and/or monitoring the respiration rate based on measurement with more than one sensor (5, 7, 9, 13, 15). The device may be part of a monitor for determining and/or monitoring the respiration rate. The second and/or additional sensors are different form the first sensor and have a different manor of operation from the first sensor.
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Citations
16 Claims
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1. A method for determining a respiration rate of a subject, the method comprising the steps of:
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measuring a first estimation of the respiration rate in a first way with a first sensor; measuring a second estimation of the respiration rate in a second way with a second sensor, said first sensor and said second sensor sensing a different physical characteristic; setting by means of a control unit one quality value for each of the first and second estimations of the respiration rate; determining a difference by means of the control unit between said first and second estimation of the respiration rate; determining by means of the control unit if said difference is greater or less than 20%; if said difference is less than 20%, then determining by means of the control unit a third estimation of the respiration rate of the subject by use of weighted averaging based on the first and second estimations of the respiration rate and their respective quality values; and if said difference is greater than 20%, then choosing one of the first and second estimations of the respiration rate with the highest quality value as an actual respiration rate of the subject. - View Dependent Claims (2, 3, 4, 5)
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6. A monitor for a subject, the monitor comprising:
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a first sensor for sensing one or more physical characteristics relating to the subject for determining a first estimation of a respiration rate of the subject; a second sensor for sensing one or more physical characteristics relating to the subject for determining a second estimation of the respiration rate of the subject, said second sensor being at least one of a different form of sensor from said first sensor, sensing a different physical characteristic from said first sensor and having a different manner of operation from said first sensor; a quality value setting means for setting a quality value for each of said first and second sensors; and a control unit for receiving signals from said first sensor and said second sensor to selectively provide the respiration rate of the subject based on physical characteristic sensing by one or both of said first sensor and said second sensor, and by each of said quality values, wherein said control unit is configured to selectively provide the respiration rate by determining a difference between said first and second estimation of the respiration rate;
determining if said difference is less than or greater than 20%, if said difference is 20% or less, then determining a third estimation of the respiration rate by use of weighted averaging based on the first and second estimations of the respiration rate and respective said quality values; and
if said difference is greater than 20%, then choosing the one of the first and second estimations with the highest quality value as an actual respiration rate of the subject. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification