System method and device for determining the risk of dehydration

Abstract

A system, device and method of determining a probability of dehydration of a person is provided. In one embodiment, the method comprises receiving data of a heart rate of the person; receiving data of a posture of the person; determining that a first posture of the person satisfies first posture criteria for a first predetermined time period; determining that the posture of the person satisfies a similarity threshold with a posture envelope; determining a first heart rate for the person while in a first posture; determining a second heart rate for the person while in the second posture; determining a change in heart rate as a difference between the second heart rate and the first heart rate; determining a first probability of dehydration based at least in part on the change in heart rate; and outputting the first probability of dehydration.

1 . A method of determining a probability of dehydration of a person, comprising:
 receiving data of a heart rate of the person over a time period from a first sensor;   receiving data of a posture of the person over the time period from a second sensor;   storing in a memory data of the heart rate of the person over the time period;   storing in the memory data of the posture of the person over the time period;   determining, via a processor, that the posture of the person during the time period satisfies a similarity threshold with a posture envelope, wherein the posture envelope comprises a first posture and a second posture;   determining, via the processor, a first heart rate for the person while in the first posture;   determining, via the processor, a second heart rate for the person while in the second posture;   determining, via the processor, a change in heart rate as a difference between the second heart rate and the first heart rate;   determining, via the processor, a first probability of dehydration based, at least in part, on the change in heart rate; and   outputting the first probability of dehydration.   
     
     
         2 . The method according to  claim 1 , wherein said determining the first probability of dehydration comprises dividing the change in heart rate by a baseline change in heart rate. 
     
     
         3 . The method according to  claim 1 , further comprising determining a second probability of dehydration by comparing the second heart rate with a predetermined threshold. 
     
     
         4 . The method according to  claim 1 , wherein said first posture comprises sitting. 
     
     
         5 . The method according to  claim 1 , wherein said first posture comprises one of sitting or lying down, and wherein said second posture comprises standing. 
     
     
         6 . The method according to  claim 1 , further comprising determining that an activity level of the person is below a threshold level while the person maintains the second posture. 
     
     
         7 . The method according to  claim 1 , further comprising determining that the person transitions from the first posture to the second posture within a predetermined time period. 
     
     
         8 . The method according to  claim 1 , further comprising:
 determining a second probability of dehydration by comparing the second heart rate with a predetermined threshold; and   outputting a signal configured to alert the person of the probability of dehydration when the second probability of dehydration exceeds a dehydration risk threshold and when the second heart rate is below the predetermined threshold.   
     
     
         9 . The method according to  claim 8 , wherein the outputted signal comprises any of an alert transmitted to a remote monitor, a locally broadcasted audible alarm, or a combination thereof. 
     
     
         10 . The method according to  claim 8 , further comprising:
 determining the dehydration risk threshold based at least in part on a desired risk of dehydration level input by the person.   
     
     
         11 . The method according to  claim 1 , wherein the first heart rate and the second heart rate comprise an average first heart rate and an average second heart rate, respectively, over the time period. 
     
     
         12 . The method according to  claim 1 , further comprising:
 comparing the first probability of dehydration with a dehydration risk threshold; and   outputting a signal configured to alert the person of the first probability of dehydration based at least in part on the comparing.   
     
     
         13 . The method according to  claim 1 , wherein said determining the first probability of dehydration comprises:
 determining a baseline change in heart rate based at least in part on at least one of an age, a weight, a gender, a fitness level, an ambient temperature associated with the person, or a combination thereof; and   dividing the change in heart rate by the baseline change in heart rate.   
     
     
         14 . The method according to  claim 13 , further comprising:
 determining the baseline change in heart rate based on crowd sourced data.   
     
     
         15 . The method according to  claim 1 , further comprising:
 determining, using data received from at least a third sensor coupled with the body of the person, that the person is experiencing panic or is perspiring, or determining an activity level of the person during the time period; and   preventing a signal configured to alert the person of the first probability of dehydration from being output when the person is experiencing panic or is perspiring.   
     
     
         16 . The method according to  claim 15 , further comprising:
 preventing the signal from being output when the activity level of the person is elevated above the activity threshold due to exercise.   
     
     
         17 . The method according to  claim 1 , wherein determining the second heart rate for the person comprises:
 determining the second heart rate for the person only after the person has maintained the second posture for a predetermined time period.   
     
     
         18 . A system for determining a probability of dehydration of a person, comprising:
 a first sensor configured to receive data of a heart rate of the person over a time period;   a second sensor configured to receive data of a posture of the person over the time period;   a memory configured to store data of the heart rate of the person over the time period, and further configured to store the data of the posture of the person over the time period; and   a processor configured to:
 determine that the posture of the person during the time period satisfies a similarity threshold with a posture envelope, wherein the posture envelope comprises a first posture and a second posture; 
 determine a first heart rate for the person while in the first posture; 
 determine a second heart rate for the person while in the second posture; 
 determine a change in heart rate as a difference between the second heart rate and the first heart rate; and 
 output the first probability of dehydration. 
   
     
     
         19 . The system according to  claim 18 , the processor being further configured to:
 divide the change in heart rate by a baseline change in heart rate; and   determine the first probability of dehydration based at least in part on the dividing.   
     
     
         20 . The system according to  claim 18 , the processor being further configured to:
 compare the second heart rate with a predetermined threshold; and   determine a second probability of dehydration based at least in part on the comparing.