Sepsis monitor

Abstract

Sensors are attached to a living being so as to generate corresponding sensor signals. A monitor is in communications with the sensors so as to derive physiological parameters responsive to the sensor signals. Predetermined limits are applied to the physiological parameters. At least one indicator responsive to the physiological parameters and the predetermined limits signal the onset of a sepsis condition in the living being.

What is claimed is: 
     
         1 . A patient monitoring method seeking to identify a sepsis condition in said patient, said method comprising:
 noninvasively generating a plurality of sensor signals responsive to physiological parameters indicative of an onset of a sepsis condition in a said patient, at least one of said sensor signals responsive to the output of a noninvasive optical sensor;   electronically computing measurements for said physiological parameters from the sensor signals, said parameters including at least oxygen saturations and respiration;   applying a plurality of predetermined rules to the physiological parameters so as to determine the onset of the sepsis condition; and   indicating to an observer the potential existence of the sepsis condition.   
     
     
         2 . The sepsis monitoring method according to  claim 1  wherein the generating comprises optically sensing constituents of pulsatile blood within the living being and acoustically sensing tracheal sounds of the living being. 
     
     
         3 . The sepsis monitoring method according to  claim 2  wherein the computing comprises deriving at least a pulse rate and a respiration rate. 
     
     
         4 . The sepsis monitoring method according to  claim 3  wherein the applying comprises determining if the pulse rate and the respiration rate are greater than a plurality of predetermined limits. 
     
     
         5 . The sepsis monitoring method according to  claim 4  wherein the indicating comprises activating a first colored light to indicate nonexistence of a sepsis condition and a second colored light to indicate a potential existence of a sepsis condition. 
     
     
         6 . The sepsis monitoring method according to  claim 1  further comprising sending a control signal to a drug administration device intravenously in communications with the living being in response to the applying step so as to provide treatment for the sepsis condition. 
     
     
         7 . A method of electronically monitoring signals indicative of a patient condition to determine when to warn a caregiver that said patient condition is indicative of sepsis, the method comprising:
 outputting a first signal from a noninvasive optical sensor indicative of an absorption of light by body tissue of said patient, said first signal also indicative of one or more physiological parameters of said patient;   outputting a second signal from one of (i) a noninvasive acoustic sensor applied to an area of skin around a patient's throat where said second signal is indicative of acoustically sensed tracheal sounds or (ii) a noninvasive blood pressure cuff device where said second signal is indicative of blood pressure;   electronically processing with a processor said first signal to output measurement values for said one or more physiological parameters including at least oxygen saturation and processing with said processor said second signal to output measurement values for said one of said respiration or said blood pressure;   electronically applying with said processor a plurality of predetermined rules to said measurement values; and   when said application of said rules indicates said patient condition is indicative of sepsis, outputting at least one of an audio or visual indication to said caregiver that a potential for sepsis exists.   
     
     
         8 . The method according to  claim 7 , wherein the outputting includes activating a first colored light to indicate nonexistence of said potential for said sepsis and a second colored light to indicate said potential of said sepsis. 
     
     
         9 . The method according to  claim 7 , further comprising sending a control signal to a drug administration device intravenously in communications with said patient, said control signal responsive to said indication of said sepsis, said device providing treatment for said sepsis.