System and method for evaluating physiological parameter data

A method of evaluating physiological parameter data, comprising:

• monitoring a patient to produce a signal comprising a sequence of numerical values for a physiological parameter over a time period;
• calculating an index based at least in part upon the signal;
• comparing the calculated index to a reported index, and if the calculated index is greater than the reported index, setting the reported index to the value of the calculated index;
• calculating a modulation of the signal;
• comparing the modulation to a previous value of the modulation of the signal to identify a trend in the modulation, and if the trend corresponds to an undesirable condition, using a first function capable of increasing the reported index, wherein the first function comprises a parabolic growth function, and/or an exponential growth function;
• and
• providing an indication of a physiological status based at least in part upon the reported index.

A method of evaluating physiological parameter data, comprising:

• monitoring a patient to produce a signal comprising a sequence of numerical values for a physiological parameter over a time period;
• calculating an index based at least in part upon the signal;
• comparing the calculated index to a reported index, and if the calculated index is greater than the reported index, setting the reported index to the value of the calculated index;
• calculating a modulation of the signal,
• comparing the modulation to a previous value of the modulation of the signal to identify a trend in the modulation, and if the trend corresponds to an undesirable condition, using a first function capable of increasing the reported index;
• applying a second function capable of decreasing the reported index, if the trend does not correspond to an unfavorable condition;
• filtering the reported index by a third function, wherein the third function comprises an infinite impulse response filter;
• and
• providing an indication of a physiological status based at least in part upon the reported index.

A medical device, comprising:

• a microprocessor configured to process a signal associated with at least one physiological parameter of a patient;
• and
• a memory configured to store machine readable instructions which, if executed, are capable of causing the microprocessor to:
• calculate an index from the signal;
• compare the calculated index to a reported index, and if the calculated index is greater than the reported index, set the reported index to the value of the calculated index;
• calculate a modulation of the numerical signal, wherein the modulation comprises the difference between a maximum value of the numerical signal and a minimum value of the numerical signal divided by a mean value of the numerical signal over a period of time;
• compare the modulation to a previous value of the modulation to identify a trend in the modulation, and if the trend corresponds to an undesirable condition, increase the reported index using a first function;
• and
• provide an indication of a physiological status based on the reported index.

A medical device, comprising:

• a microprocessor configured to process a signal associated with at least one physiological parameter of a patient;
• and
• a memory configured to store machine readable instructions which, if executed, are capable of causing the microprocessor to:
• calculate an index from the signal;
• compare the calculated index to a reported index, and if the calculated index is greater than the reported index, set the reported index to the value of the calculated index;
• calculate a modulation of the numerical signal;
• compare the modulation to a previous value of the modulation to identify a trend in the modulation, and if the trend corresponds to an undesirable condition, increase the reported index using a first function, wherein the first function comprises a parabolic growth function, and/or an exponential growth function;
• and
• provide an indication of a physiological status based on the reported index.

A medical device, comprising:

• a microprocessor configured to process a signal associated with at least one physiological parameter of a patient;
• and
• a memory configured to store machine readable instructions which, if executed, are capable of causing the microprocessor to:
• calculate an index from the signal;
• compare the calculated index to a reported index, and if the calculated index is greater than the reported index, set the reported index to the value of the calculated index;
• calculate a modulation of the numerical signal;
• compare the modulation to a previous value of the modulation to identify a trend in the modulation, and if the trend corresponds to an undesirable condition, increase the reported index using a first function;
• apply a second function to decrease the reported index, if the trend does not correspond to an unfavorable condition;
• filter the reported index by a third function, wherein the third function comprises an infinite impulse response filter;
• and
• provide an indication of a physiological status based on the reported index.

A method of evaluating physiological parameter data, comprising:

• monitoring a patient to produce a signal comprising a sequence of numerical values for a physiological parameter over a time period;
• detecting potential reciprocations by detecting potential reciprocation peaks and nadirs in the sequence of numerical values;
• determining whether the potential reciprocations are qualified by comparing metrics of the potential reciprocations with a set of limits and performing a linear qualification function;
• tracking a number of qualified reciprocations identified within a window of time and calculating an index when the number of qualified reciprocations identified within the window of time reaches or surpasses a limit;
• comparing the calculated index to a reported index, and if the calculated index is greater than the reported index, setting the reported index to the value of the calculated index;
• and
• providing an indication of a physiological status based at least in part upon the reported index.