Ventilation method and control of a ventilator based on same

• US 20060174884A1
• Filed: 03/23/2006
• Published: 08/10/2006
• Est. Priority Date: 06/21/2001
• Status: Abandoned Application

• Current Assignee: Nader M. Habashi
• Original Assignee: Nader M. Habashi
• Inventors: Habashi, Nader Maher
• Application Number:
  US11/386,807
• Publication Number:
  US 20060174884A1
• Time in Patent Office: Days
• US Class Current: 128/204.210
• CPC Class Codes: A61M 16/0003 Accessories therefor, e.g. sensors, vibrators, negative pressure
• CPC Class Codes: A61M 16/0069 the speed thereof being controlled by respiratory parameters, e.g. by inhalation
• CPC Class Codes: A61M 16/024 including calculation means, e.g. using a processor
• CPC Class Codes: A61M 2016/003 with a flowmeter
• CPC Class Codes: A61M 2016/0039 in the inspiratory circuit
• CPC Class Codes: A61M 2016/0042 in the expiratory circuit
• CPC Class Codes: A61M 2205/3331 Pressure; Flow
• CPC Class Codes: A61M 2205/3334 Measuring or controlling the flow rate
• CPC Class Codes: A61M 2205/50 with microprocessors or computers
• CPC Class Codes: A61M 2230/202 partial carbon oxide pressure, e.g. partial dioxide pressure (P-CO2)
• CPC Class Codes: A61M 2230/205 partial oxygen pressure (P-O2)

Abstract

The invention provides an improved ventilation method and method for controlling a ventilator apparatus in accordance with same. More specifically, the present invention relates to a method of controlling a ventilator apparatus comprising the steps of placing a ventilator in a mode capable of adjusting airway pressure (P) and time (T), monitoring expiratory gas flow, analyzing the expiratory gas flow over time (T) to establish an expiratory gas flow pattern, and setting and/or adjusting a low time (T2) based on the expiratory gas flow pattern. Alternatively, the present invention relates to a method of controlling a ventilator apparatus comprising the steps of placing a ventilator in a mode capable of adjusting airway pressure (P) and time (T), and setting a low airway pressure (P2) of substantially zero cmH₂O.

Claims

1-14. -14. (canceled)

15. A method of weaning from ventilation comprising the step of substantially contemporaneously adjusting a high airway pressure (P1) and a high time (T1).

16. The method of claim 15, wherein the adjusting step comprises decreasing P1 and increasing T1.

17. The method of claim 16, wherein P1 is decreased at a rate of about 2 cmH₂O per hour and T1 is increased by about 0.5 to 1.0 s substantially contemporaneously with each decrease in P1.

18. The method of claim 16, wherein P1 is decreased in increments of about 4 cmH₂O and T1 is increased in increments of about 2 s.

19. The method of claim 16, further comprising the step of transitioning ventilation from a preset continuous positive airway pressure (CPAP) level mode with an intermittent release to a substantially continuous positive airway pressure (CPAP) mode.

20. The method of claim 16, further comprising the step of transitioning ventilation from a preset continuous positive airway pressure (CPAP) level mode with an intermittent release to a substantially continuous positive airway pressure (CPAP) mode with automatic tube compensation (ATC).

21. The method of claim 19, further comprising the steps of:

a) monitoring blood oxygen levels,

b) monitoring blood carbon dioxide levels,

c) determining the ratio of spontaneous minute ventilation to machine minute ventilation, and

d) determining the level of sedation.

22. The method of claim 19, further comprising the steps of substantially simultaneously decreasing machine minute ventilation and increasing spontaneous minute ventilation to transition from the CPAP mode to an unassisted breathing mode.