Medical microprocessor system and method for providing a ventilation indexed oximetry value

A patient monitor for evaluating a patient, the monitor having a display, the monitor comprising:

• (a) a device for measuring ventilation capable of producing a first output of timed ventilation;
• (b) a pulse oximeter capable of producing a second output indicative of said patient's arterial oxygen saturation;
• (c) an input device capable of receiving an input of at least one of a patient's body dimensions;
• and
• (d) a processor programmed to:
• (d1) determine the presence of an interval of steady state ventilation and the timed ventilation during said interval to generate a first output,
• (d2) measure oxygen saturation corresponding to said interval to generate a second output,
• (d3) calculate said patient's predicted ventilation based on at least one of said body dimensions, and
• (d4) display at least said first output, said second output, and said predicted ventilation.

A microprocessor system for evaluating a patient and for detecting early evidence of serious illness in said patient by the identification of pathologic relational trending of an oxygen saturation time series relative to a corresponding ventilation time series, the system comprising a processor programmed to:

• (a) receive a first input of a time series of measured ventilation values to derive a first output indicative of a first trend of timed ventilation,
• (b) receive a second input of time series of measured arterial oxygen saturation to derive an output indicative of a second trend of oxygen saturation, said first time series corresponding to said second time series,
• (c) compare said first trend and said second trend to identify a increasing difference between said first trend and said second trend;
• and
• (d) output an indication of said increasing difference.

A patient monitor for evaluating a patient, the monitor having a display, the monitor comprising:

• (a) a device for measuring ventilation capable of producing a first output of timed ventilation;
• (b) a pulse oximeter capable of producing a second output indicative of said patient's arterial oxygen saturation;
• (c) an input device capable of receiving an input of at least one of a patient's body dimensions;
• and
• (d) a processor programmed to:
• (d1) determine the presence of an interval of steady state ventilation and the timed ventilation during said interval to generate a first output,
• (d2) measure oxygen saturation corresponding to said interval to generate a second output, and
• (d3) display at least said first output and said second output.