Physiological monitor calibration system

Abstract

A calibration system is disclosed for calibrating a first physiological monitoring device using a second physiological monitoring device. The first physiological monitor measures a first indication of a physiological parameter. The second physiological monitor measures a second indication of the physiological parameter. The first and second indications are used to calibrate the first physiological monitoring device.

1 . (canceled) 
     
     
         2 . A measurement device comprising:
 a measurement module that obtains a noninvasive physiological parameter measurement from a sensor coupled to a patient; and   a calibration module, implemented in a hardware processor, that:
 receives an alternative physiological parameter measurement; 
 determines an offset value based at least in part on a difference between the noninvasive physiological parameter measurement and the alternative physiological parameter measurement; 
 calibrates the measurement module based at least in part on the offset value; 
 tracks an age of the offset value over time; 
 outputs the offset value for presentation on a display; and 
 provides an indication to a user of the age of the offset value. 
   
     
     
         3 . The measurement device of  claim 2 , wherein the noninvasive physiological parameter measurement comprises a set of measurements. 
     
     
         4 . The measurement device of  claim 2 , wherein the alternative physiological parameter measurement comprises a set of measurements. 
     
     
         5 . The measurement device of  claim 2 , wherein the calibration module further provides a user interface control enabling a user to provide an additional offset value. 
     
     
         6 . The measurement device of  claim 2 , wherein the presentation of the offset value on the display is modified over time to reflect the age of the offset value over time. 
     
     
         7 . The measurement device of  claim 2 , wherein the calibration module further provides a user interface control enabling a user to input the alternative physiological parameter measurement into the measurement device. 
     
     
         8 . The measurement device of  claim 2 , wherein the sensor measures a hemoglobin parameter. 
     
     
         9 . A system for calibrating a measurement device, the system comprising:
 a measurement module configured to:
 receive a signal from a physiological sensor; 
 obtain a noninvasive measurement value of a physiological parameter responsive to the signal; and 
   a calibration module comprising a hardware processor, the calibration module configured to:
 receive an input reflecting an invasive measurement value for the physiological parameter; 
 calculate a calibration value based at least in part on a difference between the noninvasive measurement value and the invasive measurement value; 
 calibrate the measurement device using the calibration value; and 
 output an age of the calibration value for display to a user. 
   
     
     
         10 . The system of  claim 9 , wherein the calibration module is further configured to receive the input reflecting the invasive measurement value at the user interface from the user. 
     
     
         11 . The system of  claim 9 , wherein the calibration module is further configured to receive input reflecting the invasive measurement value over a network. 
     
     
         12 . The system of  claim 9 , wherein the calibration module is further configured to receive a modification value to the calibration value via the user interface. 
     
     
         13 . The system of  claim 12 , wherein the modification value comprises an incremental adjustment. 
     
     
         14 . The measurement device of  claim 9 , wherein the user interface modifies a depiction of the calibration value output for display based on the age of the offset value. 
     
     
         15 . A method of calibrating a measurement device, the method comprising:
 by a noninvasive measurement device,   acquiring, from a sensor coupled to a patient, noninvasive physiological parameter measurements;   receiving an alternative physiological parameter measurement at the noninvasive measurement device;   determining an offset value based at least in part on a difference between the noninvasive physiological parameter measurements and the alternative physiological parameter measurement;   calibrating the noninvasive measurement device based at least in part on the offset value;   tracking an age of the offset value over time; and   displaying a representation of the offset value on a user interface of the noninvasive measurement device, wherein the representation of the offset value is based at least in part on the age of the offset value.   
     
     
         16 . The method of  claim 15 , further comprising providing a user interface on the noninvasive measurement device, the user interface configured to provide functionality for a user to input the alternative physiological parameter measurement. 
     
     
         17 . The method of  claim 15 , further comprising providing a user interface on the noninvasive measurement device, the user interface configured to provide functionality for a user to modify the offset value. 
     
     
         18 . The method of  claim 15 , further comprising providing a user interface on the noninvasive measurement device, the user interface configured to provide functionality for a user to provide an additional offset value 
     
     
         19 . The method of  claim 15 , wherein the noninvasive physiological parameter is hemoglobin. 
     
     
         20 . The method of  claim 15 , wherein the noninvasive physiological parameter is glucose.