Parallel measurement alarm processor
AssigneeMasimo Corporation
InventorAmmar Al-Ali
Life of this patent
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Abstract
An alarm processor has a signal input responsive to a physiological parameter and a plurality of parameter processors responsive to the signal input so as to provide a plurality of different measurements of the parameter. In addition, the alarm processor has an alarm condition applicable to at least one of the measurements so as to define a limit for the parameter. Further, the alarm processor has an alarm indicator operating on the measurements and the alarm condition so as to provide an alarm output that changes state to indicate that the parameter may have exceeded the limit.
Claims27
An alarm processor which outputs at least one alarm signal when an indication of a blood oxygen saturation of a patient crosses at least one associated threshold value, the alarm processor comprising:
- a signal input responsive to a blood oxygen saturation of a patient;
- a plurality of parameter processors responsive to said signal input so as to provide a plurality of measurements indicative of said blood oxygen saturation, said measurements having differing characteristics;
- an alarm condition applicable to at least one of said measurements so as to define a limit for said measurement;
- and
- an alarm indicator operating on said measurements and said alarm condition so as to provide an alarm output that changes state to indicate that said measurement may have exceeded said limit.
An alarm processor comprising:
- a signal input responsive to a physiological parameter;
- a plurality of parameter processors responsive to said signal input so as to provide a plurality of measurements of said parameter, said measurements having differing characteristics;
- an alarm condition applicable to at least one of said measurements so as to define a limit for said parameter;
- and
- an alarm indicator operating on said measurements and said alarm condition so as to provide an alarm output that changes state to indicate that said parameter may have exceeded said limit, wherein said parameter processors include:
- a first processor configured to derive a smoothed measurement of said physiological parameter from said signal input;
- and
- a second processor configured to derive a predictive measurement of said physiological parameter from said signal input.
An alarm processor comprising:
- a signal input responsive to a physiological parameter;
- a plurality of parameter processors responsive to said signal input so as to provide a plurality of measurements of said parameter, said measurements having differing characteristics;
- an alarm condition applicable to at least one of said measurements so as to define a limit for said parameter;
- an alarm indicator operating on said measurements and said alarm condition so as to provide an alarm output that changes state to indicate that said parameter may have exceeded said limit;
- and
- a second alarm condition applicable to at least one of said measurements so as to define a corresponding second limit for said parameter, wherein said alarm indicator also operates on said second alarm condition so as to provide a second alarm output that changes state to indicate that said parameter may have exceeded said second limit.
A alarm method comprising the steps of:
- inputting a sensor signal responsive to a physiological parameter;
- processing said sensor signal to provide an smoothed measurement of said parameter and a predictive measurement of said parameter;
- and
- triggering an alarm based on both said smoothed measurement and said predictive measurement.
A pulse oximeter capable of generating at least one alarm when at least one signal indicative of blood oxygen saturation is outside acceptable ranges, the pulse oximeter comprising:
- a processor means for deriving a plurality of differing measurements indicative of a blood oxygen saturation of blood pulsing within body tissue;
- a condition means for specifying a limit on said measurement, said condition means applied to at least one of said measurements;
- and
- an indicator means for generating an alarm in response to said condition means.
An alarm processor comprising:
- a processor means for deriving a plurality of measurements of a physiological parameter;
- a condition means for specifying a limit on said parameter, said condition means applied to at least one of said measurements;
- and
- an indicator means for generating an alarm in response to said condition means and said measurement means, wherein said processor means comprises:
- an integrator means for providing a smoothed measurement of said parameter;
- and
- a predictor means for providing a predictive measurement of said parameter.
A patient monitoring device capable of reducing a number of false alarms in a pulse oximetry system, wherein the pulse oximetry system comprises the patient monitoring device and a noninvasive optical probe including at least one emitter and a light-sensitive detector capable of outputting at least one signal indicative of oxygen saturation in pulsing blood based on light from the at least one emitter that has been attenuated by body tissue, the patient monitoring device comprising:
- an input capable of receiving a signal responsive to a blood oxygen level in pulsing blood;
- processing circuitry capable of generating from the signal a plurality of measurements indicative of the blood oxygen level, wherein the plurality of measurements include at least one measurement that is comparatively slow and at least one measurement that is comparatively fast;
- an alarm indicator capable of generating at least one alarm signal when the comparatively slow measurement is below a threshold value and the fast measurement meets defined alarm criteria.
Dependencies are inferred from the claim text.