Patent ID: 11864722
Assignee: VENTDX, INC.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 13:
14. The method of claim 13, further comprising evaluating one or more of the following indices I1, I2, I3 and I4, wherein:, I
        1
      
      =
      
        
          
            
              V
              A
            
            ⁡
            
              (
              
                4
                ⁢
                
                  
                
                ⁢
                mins
              
              )
            
          
          -
          
            
              V
              A
            
            ⁡
            
              (
              
                0.5
                ⁢
                
                  
                
                ⁢
                mins
              
              )
            
          
        
        
          
            V
            A
          
          ⁡
          
            (
            
              0.5
              ⁢
              
                
              
              ⁢
              mins
            
            )
          
        
      
    
    ,
    
      

    
    ⁢
    
      
        I
        2
      
      =
      
        
          V
          
            A
            ,
            predict
          
        
        
          
            V
            A
          
          ⁡
          
            (
            
              0.5
              ⁢
              
                
              
              ⁢
              mins
            
            )
          
        
      
    
    ,
    
      

    
    ⁢
    
      
        I
        3
      
      =
      
        
          V
          
            A
            ,
            plethysmograph
          
        
        
          
            V
            A
          
          ⁡
          
            (
            
              0.5
              ⁢
              
                
              
              ⁢
              mins
            
            )
          
        
      
    
    ,
    and
  

  
    
      
        I
        4
      
      =
      
        
          
            
              
                Q
                .
              
              P
            
            ⁡
            
              (
              
                2
                ⁢
                
                  
                
                ⁢
                mins
              
              )
            
          
          -
          
            
              
                Q
                .
              
              P
            
            ⁡
            
              (
              
                4
                ⁢
                
                  
                
                ⁢
                mins
              
              )
            
          
        
        
          
            
              Q
              .
            
            P
          
          ⁡
          
            (
            
              4
              ⁢
              
                
              
              ⁢
              mins
            
            )
          
        
      
    
    ;
  

in which VA (0.5 mins) and VA (4 mins) are the lung volume estimated at sinewave periods of 0.5 minutes and 4 minutes respectively; {dot over (Q)}P (2 mins) and {dot over (Q)}P (4 mins) are the pulmonary blood flow estimated at sinewave periods of 2 minutes and 4 minutes respectively, VA,plethysmograph is the lung volume measured by body plethysmography, and VA,predict is the predicted lung volume calculated from the height and weight of the subject.