Methods and systems for qualifying calculated values based on multiple difference signals
First Claim
1. A subject monitoring system for processing physiological information of a subject, comprising:
- a pulse oximetry sensor configured to generate a physiological signal, wherein the pulse oximetry sensor detects light attenuated by the subject; and
a pulse oximeter coupled to the sensor, wherein the pulse oximeter is configured to;
receive a calculated value that is a candidate for being indicative of a physiological rate of the subject;
generate a first difference signal based on a first segment of the physiological signal;
sort the first difference signal to generate a first sorted difference signal;
generate a second difference signal based on a second segment of the physiological signal;
sort the second difference signal to generate a second sorted difference signal;
generate a third difference signal based on a third segment of the physiological signal;
sort the third difference signal to generate a third sorted difference signal;
generate a fourth difference signal based on a fourth segment of the physiological signal;
sort the fourth difference signal to generate a fourth sorted difference signal;
analyze the first sorted difference signal and the second sorted difference signal to determine at least one first metric;
analyze the third sorted difference signal and the fourth sorted difference signal to determine at least one second metric;
qualify or disqualify the calculated value based on the at least one first metric and the at least one second metric;
determine the physiological rate of the subject based on the calculated value when the calculated value is qualified; and
display the physiological rate of the subject on a display.
2 Assignments
0 Petitions
Accused Products
Abstract
A physiological monitoring system may determine physiological information, such as physiological rate information, from a physiological signal. The system may receive a calculated value indicative of a physiological rate. The system may generate and sort multiple difference signals based on the physiological signal. The system may analyze a first sorted difference signal and a second sorted difference signal to determine at least one first metric, and analyze a third sorted difference signal and a fourth sorted difference signal to determine at least one second metric. The system may qualify or disqualify the calculated value based on the at least one first and second metrics. The segments used to generate the third and fourth sorted difference signals may, for example, be subsets of the segments used to generate the first and second sorted difference signals.
47 Citations
28 Claims
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1. A subject monitoring system for processing physiological information of a subject, comprising:
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a pulse oximetry sensor configured to generate a physiological signal, wherein the pulse oximetry sensor detects light attenuated by the subject; and a pulse oximeter coupled to the sensor, wherein the pulse oximeter is configured to; receive a calculated value that is a candidate for being indicative of a physiological rate of the subject; generate a first difference signal based on a first segment of the physiological signal; sort the first difference signal to generate a first sorted difference signal; generate a second difference signal based on a second segment of the physiological signal; sort the second difference signal to generate a second sorted difference signal; generate a third difference signal based on a third segment of the physiological signal; sort the third difference signal to generate a third sorted difference signal; generate a fourth difference signal based on a fourth segment of the physiological signal; sort the fourth difference signal to generate a fourth sorted difference signal; analyze the first sorted difference signal and the second sorted difference signal to determine at least one first metric; analyze the third sorted difference signal and the fourth sorted difference signal to determine at least one second metric; qualify or disqualify the calculated value based on the at least one first metric and the at least one second metric; determine the physiological rate of the subject based on the calculated value when the calculated value is qualified; and display the physiological rate of the subject on a display. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A processing module of a pulse oximeter for processing physiological information of a subject, wherein the processing module is configured to:
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receive a physiological signal derived from a detector output of a pulse oximetry sensor, wherein the detector detects light attenuated by the subject; receive a calculated value that is a candidate for being indicative of a physiological rate of the subject; generate a first difference signal based on a first segment of the physiological signal; sort the first difference signal to generate a first sorted difference signal; generate a second difference signal based on a second segment of the physiological signal; sort the second difference signal to generate a second sorted difference signal; generate a third difference signal based on a third segment of the physiological signal; sort the third difference signal to generate a third sorted difference signal; generate a fourth difference signal based on a fourth segment of the physiological signal; sort the fourth difference signal to generate a fourth sorted difference signal; analyze the first sorted difference signal and the second sorted difference signal to determine at least one first metric; analyze the third sorted difference signal and the fourth sorted difference signal to determine at least one second metric; qualify or disqualify the calculated value based on the at least one first metric and the at least one second metric; determine the physiological rate of the subject based on the calculated value when the calculated value is qualified; and display the physiological rate of the subject on a display. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method for processing physiological information of a subject using a pulse oximeter, comprising:
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receiving, using the pulse oximeter, a physiological signal derived from a detector output of a pulse oximetry sensor, wherein the detector detects light attenuated by the subject; receiving, using the pulse oximeter, a calculated value that is a candidate for being indicative of a physiological rate of the subject; generating, using the pulse oximeter, a first difference signal based on a first segment of the physiological signal; sorting, using the pulse oximeter, the first difference signal to generate a first sorted difference signal; generating, using the pulse oximeter, a second difference signal based on a second segment of the physiological signal; sorting, using the pulse oximeter, the second difference signal to generate a second sorted difference signal; generating, using the pulse oximeter, a third difference signal based on a third segment of the physiological signal; sorting, using the pulse oximeter, the third difference signal to generate a third sorted difference signal; generating, using the pulse oximeter, a fourth difference signal based on a fourth segment of the physiological signal; sorting, using the pulse oximeter, the fourth difference signal to generate a fourth sorted difference signal; analyzing, using the pulse oximeter, the first sorted difference signal and the second sorted difference signal to determine at least one first metric; analyzing, using the pulse oximeter, the third sorted difference signal and the fourth sorted difference signal to determine at least one second metric; qualifying or disqualifying, using the pulse oximeter, the calculated value based on the at least one first metric and the at least one second metric; determining, using the pulse oximeter, the physiological rate of the subject based on the calculated value when the calculated value is qualified; and displaying, using the pulse oximeter, the physiological rate of the subject on a display. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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22. A non-transitory computer-readable medium for use in processing physiological information of a subject, the non-transitory computer-readable medium comprising:
computer program instructions recorded thereon for causing a pulse oximeter to; receive a physiological signal derived from a detector output of a pulse oximetry sensor, wherein the detector detects light attenuated by the subject; receive a calculated value that is a candidate for being indicative of a physiological rate of the subject; generate a first difference signal based on a first segment of the physiological signal; sort the first difference signal to generate a first sorted difference signal; generate a second difference signal based on a second segment of the physiological signal; sort the second difference signal to generate a second sorted difference signal; generate a third difference signal based on a third segment of the physiological signal; sort the third difference signal to generate a third sorted difference signal; generate a fourth difference signal based on a fourth segment of the physiological signal; sort the fourth difference signal to generate a fourth sorted difference signal; analyze the first sorted difference signal and the second sorted difference signal to determine at least one first metric; analyze the third sorted difference signal and the fourth sorted difference signal to determine at least one second metric; qualify or disqualify the calculated value based on the at least one first metric and the at least one second metric determine the physiological rate of the subject based on the calculated value when the calculated value is qualified; and display the physiological rate of the subject on a display. - View Dependent Claims (23, 24, 25, 26, 27, 28)
Specification