Methods and systems for qualifying calculated values based on state transitions
First Claim
1. A subject monitoring pulse oximetry system for processing physiological information of a subject, comprising:
- a pulse oximetry sensor configured to generate a physiological signal, wherein the 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;
select a plurality of pairs of sample points of the physiological signal spaced by a particular spacing, wherein the particular spacing is based on the calculated value;
determine a state for each of the plurality of pairs, wherein each state corresponds to a set of criteria;
determine a number of state transitions based on the determined states;
qualify or disqualify the calculated value as being indicative of the physiological rate of the subject based on the number of state transitions;
determine the physiological rate of the subject based on the calculated value if the calculated value is qualified; and
display the physiological rate of the subject on a display.
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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. Based on the value, the system may select pairs of values of the physiological signal that are particularly spaced. The system may determine a state for each pair of values. The state may correspond to a set of criteria such as, for example, equalities, inequalities, logical operators, or other criteria. The system may determine a number of state transitions based on the determined states, and qualify or disqualify the calculated value based on the number of state transitions.
35 Citations
26 Claims
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1. A subject monitoring pulse oximetry 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 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; select a plurality of pairs of sample points of the physiological signal spaced by a particular spacing, wherein the particular spacing is based on the calculated value; determine a state for each of the plurality of pairs, wherein each state corresponds to a set of criteria; determine a number of state transitions based on the determined states; qualify or disqualify the calculated value as being indicative of the physiological rate of the subject based on the number of state transitions; determine the physiological rate of the subject based on the calculated value if 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, 8)
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9. 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; select a plurality of pairs of sample points of the physiological signal spaced by a particular spacing, wherein the particular spacing is based on the calculated value;
determine a state for each of the plurality of pairs, wherein each state corresponds to a set of criteria;determine a number of state transitions based on the determined states; qualify or disqualify the calculated value as being indicative of the physiological rate of the subject based on the number of state transitions; determine the physiological rate of the subject based on the calculated value if the calculated value is qualified; and display, on a display of the pulse oximeter, the physiological rate of the subject. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A method for processing physiological information of a subject by 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; selecting, using the pulse oximeter, a plurality of pairs of sample points of the physiological signal spaced by a particular spacing, wherein the particular spacing is based on the calculated value; determining, using the pulse oximeter, a state for each of the plurality of pairs, wherein each state corresponds to a set of criteria; determining, using the pulse oximeter, a number of state transitions based on the determined states; qualifying or disqualifying, using the pulse oximeter, the calculated value as being indicative of the physiological rate of the subject based on the number of state transitions; determining, using the pulse oximeter, the physiological rate of the subject based on the calculated value if the calculated value is qualified; and displaying, on a display of the pulse oximeter, the physiological rate of the subject. - View Dependent Claims (16, 17, 18, 19, 20)
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21. A non-transitory computer-readable medium for use in processing physiological information of a subject, the computer-readable medium comprising:
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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; select a plurality of pairs of sample points of the physiological signal spaced by a particular spacing, wherein the particular spacing is based on the calculated value; determine a state for each of the plurality of pairs, wherein each state corresponds to a set of criteria; determine a number of state transitions based on the determined states; qualify or disqualify the calculated value as being indicative of the physiological rate of the subject based on the number of state transitions; determine the physiological rate of the subject based on the calculated value if the calculated value is qualified; and display, on a display of the pulse oximeter, the physiological rate of the subject. - View Dependent Claims (22, 23, 24, 25, 26)
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Specification