SETTING INSPIRATORY TIME IN MANDATORY MECHANICAL VENTILATION BASED ON PATIENT PHYSIOLOGY, SUCH AS FORCED INHALATION TIME

• US 20080230063A1
• Filed: 03/23/2007
• Published: 09/25/2008
• Est. Priority Date: 03/23/2007
• Status: Abandoned Application

• Current Assignee: General Electric Company
• Original Assignee: General Electric Company
• Inventors: Tham, Robert Quinyew
• Application Number:
  US11/690,594
• Publication Number:
  US 20080230063A1
• Time in Patent Office: Days
• US Class Current: 128/204.23
• CPC Class Codes: A61H 31/02 "Iron-lungs" , i.e. involving chest expansion by applying underpressure thereon, whether or not combined with gas breathing means
• CPC Class Codes: A61M 16/00 Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes stimulating the respiratory movement by mechanical, pneumatic or electrical means, iron lungs combined with gas breathing means A61H31/00
• CPC Class Codes: A61M 16/024 including calculation means, e.g. using a processor
• CPC Class Codes: A61M 2230/205 partial oxygen pressure (P-O2)
• CPC Class Codes: A61M 2230/40 Respiratory characteristics
• CPC Class Codes: A61M 2230/42 Rate
• CPC Class Codes: A61M 2230/43 Composition of exhalation

Abstract

A method of setting inspiratory time in pressure controlled mechanical ventilation sets a subject'"'"'s inspiratory time based on the subject'"'"'s forced inhalation time. Another determines the subject'"'"'s forced inhalation time and sets the subject'"'"'s inspiratory time based on the determination.

Claims

1. A method of setting inspiratory time in pressure controlled mechanical ventilation, comprising:

setting a subject'"'"'s inspiratory time based on said subject'"'"'s forced inhalation time.

2. A method of setting inspiratory time in pressure controlled mechanical ventilation, comprising:

determining a subject'"'"'s forced inhalation time; and

setting said subject'"'"'s inspiratory time based on said determination.

3. The method of claim 2, wherein said inspiratory time is set equal to said forced inhalation time.

4. The method of claim 2, wherein said inspiratory time is set substantially equal to said forced inhalation time.

5. The method of claim 2, wherein said inspiratory time is set greater than or equal to said forced inhalation time.

6. The method of claim 2, wherein said determination is based, at least in part, on a flow rate sensor.

7. The method of claim 6, wherein said flow rate sensor is selected from a group consisting of a spirometer, anemometer, thermal anemometer, pneumotachometer, and ultrasound flow sensor.

8. The method of claim 6, wherein said flow rate sensor determines said subject'"'"'s breathing gas flow rate.

9. The method of claim 2, wherein said determination is based, at least in part, on effects of gas movement in said subject'"'"'s airways.

10. The method of claim 9, wherein said effects are determined, at least in part, by one or more of the following:

acoustic analysis of said subject;

vibration analysis of said subject;

airway pressure analysis of said subject;

capnographic morphology analysis of said subject; and

respiratory mechanics analysis of said subject.

11. The method of claim 2, wherein said determination is based, at least in part, on thoracic excursion of said subject corresponding to said subject'"'"'s lung volume.

12. The method of claim 11, wherein said thoracic excursion comprises one or more of the following:

imaging said subject;

plethysmographic analysis of said subject; and

electrical impedance tomography analysis of said subject.

13. The method of claim 2, further comprising:

displaying at least one or more of said forced inhalation time or said inspiratory time or both on a monitor.

14. The method of claim 13, wherein said monitor is at least one of a handheld or portable device or both.

15. A device for use in pressure controlled mechanical ventilation, comprising:

a flow rate sensor configured to determine a subject'"'"'s forced inhalation time and base said subject'"'"'s inspiratory time on said determination.

16. The device of claim 15, wherein said flow rate sensor is selected from a group consisting of a spirometer, anemometer, thermal anemometer, pneumotachometer, and ultrasound flow sensor.

17. The device of claim 15, wherein said flow rate sensor determines said subject'"'"'s breathing gas flow rate.

18. The device of claim 15, further comprising:

circuitry operable in conjunction with said flow rate sensor configured to set said inspiratory time based on said determination.