Pulse oximetry relational alarm system for early recognition of instability and catastrophic occurrences
First Claim
1. A pulse oximeter based system for the recognition of patterns in a plurality of time series, the system comprising a processor programmed to:
- process a first time series to identify a first primary threshold breach based on the first time series;
process a second time series;
compare at least a portion of the first time series to at least a portion of the second time series to produce a comparison result;
identify a relational threshold breach based at least in part on the comparison result; and
output an alarm based on at least one of the primary and the relational threshold breaches.
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Abstract
A relational pulse oximetry alarm system and method is presented for earlier identification of the occurrence of an adverse clinical event. The system includes a pulse oximeter based microprocessor alarm system which provides an alarm based on a relational conformation of a plurality of time series and further based on the recognition of specific dynamic patterns of interaction between a plurality of corresponding and related time series including the occurrence of pathophysiologic divergence of two or more time series outputs. The processor is programmed to compare a first time series to a second time series to produce a comparison result, to identify a relationship between the first time series and the second time series, to identify a relational threshold breach, and to output an alarm based on the relational threshold breach. The system can include an oximeter testing system for predicting the timeliness of the response of the alarm of a pulse oximeter to the occurrence of an adverse clinical event.
149 Citations
43 Claims
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1. A pulse oximeter based system for the recognition of patterns in a plurality of time series, the system comprising a processor programmed to:
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process a first time series to identify a first primary threshold breach based on the first time series; process a second time series; compare at least a portion of the first time series to at least a portion of the second time series to produce a comparison result; identify a relational threshold breach based at least in part on the comparison result; and output an alarm based on at least one of the primary and the relational threshold breaches.
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2. An oximeter testing system for testing an oximeter, the system comprising:
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a processor programmed to generate an output indicative of a time series of oxygen saturation values, the output simulating a time series of oxygen saturation values associated with an occurrence of an adverse clinical event, and programmed to calculate a difference between a time of onset of the occurrence and a time of onset of the alarm; and an oxygen saturation simulator for presenting the output to the oximeter to determine a delay between the time of onset of the occurrence and the time of onset of the alarm. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of processing data comprising a plurality of time series, the method comprising:
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searching a first one of the plurality of time series for data corresponding to a primary threshold breach; producing an alarm output if data corresponding to the primary threshold breach is discovered; searching the first one of the plurality of time series and a second one of the plurality of time series for data corresponding to a relationship between the first one of the plurality of time series and the second one of the plurality of time series; searching data corresponding to the relationship for data corresponding to a relational threshold breach; and producing an output indicative of the relational threshold breach if data corresponding to the relational threshold breach is discovered. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A method of processing data comprising a plurality of time series, the method comprising:
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searching a first one of the plurality of time series for data corresponding to a primary threshold breach; searching the first one of the plurality of time series and a second one of the plurality of time series for data corresponding to a relationship between the first one of the plurality of time series and the second one of the plurality of time series, the relationship being independent of the primary threshold breach; searching data corresponding to the relationship for data corresponding to a relational threshold breach; and producing an output indicative of at least one of the primary threshold breach and the relational threshold breach if data corresponding to at least one of the breaches is discovered. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43)
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Specification