SYSTEMS AND METHODS FOR MISSED BREATH DETECTION AND INDICATION

• US 20140012150A1
• Filed: 07/09/2012
• Published: 01/09/2014
• Est. Priority Date: 07/09/2012
• Status: Active Grant

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Nellcor Puritan Bennett LLC (Medtronic Plc)
• Inventors: Milne, Gary, Hyde, David
• Granted Patent: US 10,362,967 B2
• Time in Patent Office: Days
• US Class Current: 600/529
• CPC Class Codes: A61B 5/0816 Measuring devices for examining respiratory frequency measuring frequency of electric signals G01R23/00
• CPC Class Codes: A61B 5/0826 Detecting or evaluating apnoea events A61B5/4818 takes precedence
• CPC Class Codes: A61B 5/087 Measuring breath flow
• CPC Class Codes: A61M 16/0051 with alarm devices
• CPC Class Codes: A61M 16/0063 Compressors
• CPC Class Codes: A61M 16/024 including calculation means, e.g. using a processor
• CPC Class Codes: A61M 2016/0021 with a proportional output signal, e.g. from a thermistor
• CPC Class Codes: A61M 2016/0027 pressure meter
• CPC Class Codes: A61M 2016/0033 electrical
• CPC Class Codes: A61M 2205/505 Touch-screens; Virtual keyboard or keypads; Virtual buttons; Soft keys; Mouse touches
• CPC Class Codes: A61M 2205/52 with memories providing a history of measured variating parameters of apparatus or patient

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.

Claims

1. A method implemented by a ventilator for determining missed breaths, the method comprising:

monitoring respiratory data with at least one sensor;

analyzing the respiratory data with a first trigger detection application and a second trigger detection application;

detecting patient inspiratory efforts with the first trigger detection application and the second trigger detection application;

calculating a missed breaths metric based on detected patient inspiratory efforts by the first trigger detection application and detected patient inspiratory efforts by the second trigger detection application; and

displaying a missed breath indicator based on the missed breaths metric.

2. The method according to claim 1, wherein the first trigger detection application monitors patient inspiratory efforts based on at least intrapleural pressure.

3. The method according to claim 1, wherein the step of calculating the missed breaths metric comprises:

updating a counter with a sum of the detected patient inspiratory efforts by the first trigger detection application and a sum of the detected patient inspiratory efforts by the second trigger detection application;

determining a difference with the counter between the sum of the detected patient inspiratory efforts by the first trigger detection application and the sum of the detected patient inspiratory efforts by the second trigger detection application; and

calculating a missed breaths metric based on the difference.

4. The method according to claim 1, wherein the step of calculating the missed breaths metric comprises:

updating a first counter with a sum of the detected patient inspiratory efforts by the first trigger detection application and a second counter with a sum of the detected patient inspiratory efforts by the second trigger detection application;

determining a difference between the first counter and the second counter; and

calculating the missed breaths metric based on the difference.

5. The method according to claim 1, wherein the step of displaying the missed breath indicator comprises:

determining a graphical representation of the respiratory data;

displaying the graphical representation;

determining an appropriate position for the missed breaths metric on the graphical representation based on time; and

displaying the missed breath indicator based on the missed breaths metric at the appropriate position on the graphical representation.

6. The method according to claim 1, wherein the step of displaying the missed breath indicator comprises:

archiving a plurality of missed breaths metrics during a time period;

determining an appropriate missed breath indicator based on the archived plurality of missed breaths metrics; and

displaying the missed breath indicator.

7. The method according to claim 6, wherein the step of displaying the missed breath indicator comprises:

determining a graphical representation of the respiratory data;

displaying the graphical representation;

determining an appropriate position on the graphical representation based on time for the archived plurality of missed breaths metrics; and

displaying the missed breath indicator at the appropriate position on the graphical representation.

8. A graphical user interface for displaying respiratory data, the ventilator configured with a computer having a user interface including the graphical user interface for accepting commands and for displaying respiratory data, the graphical user interface comprising:

graphical representations of respiratory data; and

a missed breath indicator.

9. The graphical user interface according to claim 8, further comprising:

a delivered breath indicator on the graphical representation.

10. The graphical user interface according to claim 8, wherein the missed breath indicator is based on detected patient inspiratory efforts from monitoring intrapleural pressure.

11. The graphical user interface according to claim 8, wherein the missed breath indicator is a cursor on the graphical representation representing a temporal location of a missed breath.

12. The graphical user interface according to claim 8, wherein the missed breath indicator is at least one of a rate and a percentage representing missed breaths per total breaths, wherein total breaths is the addition of missed breaths and delivered breaths.

13. A ventilatory system for providing a graphical user interface for accepting commands and for displaying respiratory data, comprising:

at least one display device;

a missed breath module that determines missed breaths based on a first trigger detection application;

a ventilation module that determines ventilation of a patient based on a second trigger detection application; and

at least one memory, communicatively coupled to the at least one processor and containing instructions that, when executed by a processor of the ventilatory system, provide a graphical user interface on the at least one display, comprising;

a missed breath indicator.

14. The ventilatory system of claim 13, wherein the first trigger detection application determines missed breaths based on monitored intrapleural pressure.

15. The ventilatory system of claim 13, wherein the graphical user interface on the at least one display further comprises:

graphical representations of respiratory data, wherein the missed breath indicator is located on the graphical representation.

16. The ventilatory system of claim 13, wherein the missed breath indicator includes an archived ineffective indicator.

17. A computer-readable medium having computer-executable instructions for performing a method implemented by a ventilator for determining missed breaths, the method comprising:

repeatedly monitoring respiratory data with at least one sensor;

repeatedly analyzing the respiratory data with a first trigger detection application and a second trigger detection application;

repeatedly detecting patient inspiratory efforts with the first trigger detection application and the second trigger detection application;

repeatedly calculating a missed breaths metric based on the results of the detection operation; and

repeatedly displaying a missed breath indicator based on the missed breaths metric.

18. A medical ventilator system, comprising:

means for monitoring respiratory data with at least one sensor;

means for analyzing the respiratory data with a first trigger detection application and a second trigger detection application;

means for detecting patient inspiratory efforts with the first trigger detection application and the second trigger detection application;

means for calculating a missed breaths metric based on the results of the detection operation; and

means for displaying a missed breath indicator based on the missed breaths metric.

19. A method implemented by a ventilator for displaying respiratory data on a graphical user interface, the method comprising:

detecting patient efforts with a first trigger detection application and a second trigger detection application;

determining an ineffective trigger effort by the patient based on detected patient efforts by the first trigger detection application not correlating with detected patient efforts by the second trigger detection application; and

displaying a missed breath indicator for the ineffective trigger effort.

20. The method according to claim 19, wherein the first trigger detection application monitors patient efforts based on at least intrapleural pressure.

21. The method according to claim 19, wherein the step of displaying the missed breath indicator comprises:

archiving a plurality of ineffective trigger efforts during a time period;

determining an appropriate archived ineffective indicator for the archived plurality of ineffective trigger efforts; and

displaying the appropriate archived ineffective indicator for the archived plurality of ineffective trigger efforts.

22. The method according to claim 19, wherein the step of displaying the missed breath indicator comprises:

archiving a plurality of ineffective trigger efforts and effective trigger efforts during a time period resulting in an archived plurality of total trigger efforts;

determining an appropriate archived total indicator for the archived plurality of total trigger efforts; and

displaying the appropriate archived total indicator for the archived plurality of total trigger efforts.