Systems and methods for missed breath detection and indication

Abstract

This disclosure describes improved systems and methods for displaying respiratory data to a clinician in a ventilatory system. Respiratory data may be displayed by any number of suitable means, for example, via appropriate graphs, diagrams, charts, waveforms, and other graphic displays. The disclosure describes novel systems and methods for determining and displaying ineffective patient inspiratory or expiratory efforts or missed breaths in a manner easily deciphered by a clinician.

1 - 22 . (canceled) 
     
     
         23 . A ventilator system comprising:
 a pneumatic system for delivering respiratory gases to a patient;   at least one processor; and   at least one memory communicatively coupled to the at least one processor and storing computer executable instructions that, when executed by the at least one processor, cause the ventilator system to:
 monitor respiratory data of the patient; 
 concurrently analyze the respiratory data using a background trigger detection application and an active trigger detection application, wherein the background trigger detection application and the active trigger detection application are different; 
 detect a first patient inspiratory effort with the background trigger application; 
 detect a second patient inspiratory effort with the active trigger application; 
 determine a timing difference between the first patient inspiratory effort and the second inspiratory effort; 
 based on the timing difference, form a missed breath determination; 
 calculate a missed breaths metric based on the missed breath determination; and 
 display a missed breath indicator based on the missed breaths metric. 
   
     
     
         24 . The ventilator system according to  claim 23 , wherein the background trigger detection application monitors patient inspiratory efforts based on at least intrapleural pressure. 
     
     
         25 . The ventilator system according to  claim 23 , the computer executable instructions further causing the ventilator system to:
 compare the timing difference between the first patient inspiratory effort and the second inspiratory effort to a time delay threshold; and   form the missed breath determination based on the comparison.   
     
     
         26 . The ventilator system according to  claim 23 , the computer executable instructions further causing the ventilator system to:
 deliver inspiratory gases to the patient based on one of the first patient inspiratory effort or the second patient inspiratory effort.   
     
     
         27 . The ventilator system according to  claim 23 , the computer executable instructions further causing the ventilator system to:
 deliver inspiratory gases to the patient based on the second patient inspiratory effort and not the first patient inspiratory effort.   
     
     
         28 . The ventilator system according to  claim 23 , wherein calculating the missed breaths metric comprises:
 updating a counter with a first sum of detected patient inspiratory efforts by the background trigger detection application and a second sum of detected patient inspiratory efforts by the active trigger detection application;   determining a difference between the first sum of the detected patient inspiratory efforts and the second sum of the detected patient inspiratory efforts; and   calculating the missed breaths metric based on the difference.   
     
     
         29 . The ventilator system according to  claim 23 , wherein calculating the missed breaths metric comprises:
 updating a first counter with a first sum of detected patient inspiratory efforts by the background trigger detection application and a second counter with a second sum of detected patient inspiratory efforts by the active trigger detection application;   determining a difference between the first counter and the second counter; and   calculating the missed breaths metric based on the difference.   
     
     
         30 . The ventilator system according to  claim 23 , wherein displaying the missed breath indicator comprises:
 generating a graphical representation of the respiratory data;   determining a position for the missed breath indicator on the graphical representation   based on a time element associated with the missed breaths metric; and   displaying the missed breath indicator at the position on the graphical representation.   
     
     
         31 . The ventilator system according to  claim 23 , wherein displaying the missed breath indicator comprises:
 archiving one or more missed breaths metrics during a time period;   determining a missed breath indicator corresponding to the archived one or more missed breaths metrics; and   displaying the corresponding missed breath indicator.   
     
     
         32 . The ventilator system according to  claim 31 , wherein displaying the corresponding missed breath indicator comprises:
 generating a graphical representation of the respiratory data;   determining a position for the corresponding missed breaths indicator on the graphical representation based on the time period associated with the archived one or more missed breaths metrics; and   displaying the corresponding missed breath indicator at the position on the graphical representation.   
     
     
         33 . A non-transitory computer-readable medium having computer executable instructions implemented by a processor on a ventilator for determining missed breaths, the instructions causing the ventilator to:
 monitor respiratory data of the patient;   concurrently analyze the respiratory data using a background trigger detection application and an active trigger detection application, wherein the background trigger detection application and the active trigger detection application are different;   detect a first patient inspiratory effort with the background trigger application;   detect a second patient inspiratory effort with the active trigger application;   determine a timing difference between the first patient inspiratory effort and the second inspiratory effort;   calculate a missed breaths metric based on the timing difference; and   display a missed breath indicator based on the missed breaths metric.   
     
     
         34 . The non-transitory computer-readable medium according to  claim 33 , wherein the background trigger detection application monitors patient inspiratory efforts based on at least intrapleural pressure. 
     
     
         35 . The non-transitory computer-readable medium according to  claim 33 , the computer executable instructions further causing the ventilator system to:
 compare the timing difference between the first patient inspiratory effort and the second inspiratory effort to a time delay threshold; and   form a missed breath determination based on the comparison.   
     
     
         36 . The non-transitory computer-readable medium according to  claim 33 , the computer executable instructions further causing the ventilator system to deliver inspiratory gases to the patient based on the second patient inspiratory effort and not the first patient inspiratory effort. 
     
     
         37 . The non-transitory computer-readable medium according to  claim 33 , wherein the missed breath indicator is displayed concurrently with a delivered breath indicator. 
     
     
         38 . A ventilator system comprising:
 a pneumatic system for delivering respiratory gases to a patient;   at least one processor; and   at least one memory communicatively coupled to the at least one processor and storing computer executable instructions that, when executed by the at least one processor, cause the ventilator system to:
 monitor respiratory data of the patient for multiple breaths; 
 repeatedly analyze the respiratory data using a background trigger detection application and an active trigger detection application, wherein the background trigger detection application and the active trigger detection application are different; 
 for each of the breaths in the multiple breaths, detect a first patient inspiratory effort with the background trigger application; 
 for each of the breaths in the multiple breaths, detect a second patient inspiratory effort with the active trigger application; 
 determine timing differences between the first patient inspiratory efforts and the second inspiratory efforts; 
 calculate missed breaths metrics based on the timing differences; and 
 display missed breath indicators based on the missed breaths metrics. 
   
     
     
         39 . The ventilator system according to  claim 38 , wherein the background trigger detection application monitors patient inspiratory efforts based on at least intrapleural pressure. 
     
     
         40 . The ventilator system according to  claim 38 , wherein the missed breath indicators are displayed concurrently with at least one delivered breath indicator. 
     
     
         41 . The ventilator system according to  claim 40 , wherein the missed breath indicators and delivered breath indicator are displayed on a graphical representation of a waveform. 
     
     
         42 . The ventilator system according to  claim 41 , wherein the waveform is one of a pressure waveform or a flow waveform.