Methods and systems for recalibrating a blood pressure monitor with memory
First Claim
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1. A method for triggering a cuff-based blood pressure measurement of a subject, the method comprising:
- receiving a photoplethysmograph (PPG) signal from a sensor;
monitoring, using a processor, a first value of a metric derived at least in part from the PPG signal;
comparing, using the processor, the first value of the metric to each stored value of a plurality of stored values, wherein each stored value of the plurality of stored values is associated with a respective calibration parameter;
determining, using the processor, that the first value of the metric does not correspond to any stored value of the plurality of stored values based at least in part on the comparison;
triggering, using the processor, the cuff-based blood pressure measurement in response to determining that the first value of the metric does not correspond to any stored value of the plurality of stored values;
executing, using an inflatable cuff, the cuff-based blood pressure measurement of the subject in response to the trigger;
determining, using the processor, a second value of the metric;
comparing, using the processor, the second value of the metric to stored values of the plurality of stored values;
determining, using the processor, that the second value of the metric corresponds to a stored value of the plurality of stored values based at least in part on the comparison; and
recalling, from at least one memory device, a set of blood pressure calibration parameters associated with the stored value of the plurality of stored values based on determining that the second value of the metric corresponds to the stored value.
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Abstract
Systems and methods are provided for storing and recalling metrics associated with physiological signals. It may be determined that the value of a monitored physiological metric corresponds to a stored value. In such cases, a patient monitor may determine that a calibration is not desired. In some cases, a patient monitor may recall calibration parameters associated with the stored value if it determined that the stored value corresponds to the monitored metric value.
229 Citations
20 Claims
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1. A method for triggering a cuff-based blood pressure measurement of a subject, the method comprising:
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receiving a photoplethysmograph (PPG) signal from a sensor; monitoring, using a processor, a first value of a metric derived at least in part from the PPG signal; comparing, using the processor, the first value of the metric to each stored value of a plurality of stored values, wherein each stored value of the plurality of stored values is associated with a respective calibration parameter; determining, using the processor, that the first value of the metric does not correspond to any stored value of the plurality of stored values based at least in part on the comparison; triggering, using the processor, the cuff-based blood pressure measurement in response to determining that the first value of the metric does not correspond to any stored value of the plurality of stored values; executing, using an inflatable cuff, the cuff-based blood pressure measurement of the subject in response to the trigger; determining, using the processor, a second value of the metric; comparing, using the processor, the second value of the metric to stored values of the plurality of stored values; determining, using the processor, that the second value of the metric corresponds to a stored value of the plurality of stored values based at least in part on the comparison; and recalling, from at least one memory device, a set of blood pressure calibration parameters associated with the stored value of the plurality of stored values based on determining that the second value of the metric corresponds to the stored value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system for triggering a cuff-based blood pressure measurement of a subject, the system comprising:
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a signal input configured to receive a PPG signal of a subject from a sensor; a processor coupled to the signal input, wherein the processor is configured to; monitor a first value of a metric derived at least in part from the PPG signal; compare the first value of the metric to each stored value of a plurality of stored values, wherein each stored value of the plurality of stored values is associated with a respective calibration parameter; determine that the first value of the metric does not correspond to any stored value of the plurality of stored values based at least in part on the comparison; trigger the cuff-based blood pressure measurement in response to determining that the first value of the metric does not correspond to any stored value of the plurality of stored values; determine a second value of the metric; compare the second value of the metric to stored values of the plurality of stored values; determine that the second value of the metric corresponds to a stored value of the plurality of stored values based at least in part on the comparison; and recall, from at least one memory device, a set of blood pressure calibration parameters associated with the stored value of the plurality of stored values based on determining that the second value of the metric corresponds to the stored value; and an inflatable cuff coupled to the processor, wherein the inflatable cuff is configured to execute the cuff-based blood pressure measurement of the subject in response to the trigger. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification