Interactive simulation of a pneumatic system

• US 7,128,578 B2
• Filed: 05/29/2003
• Issued: 10/31/2006
• Est. Priority Date: 05/29/2002
• Status: Expired due to Fees

• Current Assignee: University of Florida Research Foundation, Incorporated (State University System of Florida)
• Original Assignee: University of Florida Research Foundation, Incorporated (State University System of Florida)
• Inventors: Liem, Edwin Boediono, Lampotang, Samsun, Lizdas, David Erik
• Primary Examiner(s): Cheng, Joe H.
• Application Number:
  US10/447,379
• Publication Number:
  US 20030233049A1
• Time in Patent Office: 1,251 Days
• Field of Search: 434/118, 434/219, 434/262, 434/307.R, 434/308, 434/365, 128/204.21, 128/204.23, 128/205.11, 600/529, 600/532, 376/245
• US Class Current: 434/365
• CPC Class Codes: G09B 23/12 of liquids or gases
• CPC Class Codes: G09B 23/30 Anatomical models G09B23/281 - G09B23/288 take precedence

Abstract

A method, system and apparatus for simulating a pneumatic system. The method can include dividing a pneumatic system into logical component sections. Each of the logical component sections can be visually rendered in a graphical user interface. Also, user modification of control element settings in the logical component sections can be permitted. Subsequently, gas flows within the logical component sections can be animated using individually rendered gas molecule icons coupled to corresponding animation scripts. Each of the scripts can determine an animation direction and animation rate for a corresponding one of the gas molecule icons. In particular, the actual pneumatic system can be an anesthesia machine.

Claims

1. An interactive simulator configured to simulate a pneumatic system, the simulator comprising:

a user interface configured for establishing ventilation modes and settings for a simulated pneumatic system;

a visual display communicatively linked to said user interface and configured to present a dynamically determined animated illustration of the simulated pneumatic system;

a plurality of gas molecule animation logic scripts for animating images of simulated gas molecules on said visual display, each of said gas molecule animation logic scripts causing said images of simulated gas molecules to move in a prescribed direction and at a prescribed speed within a portion of said simulated pneumatic system on said visual display; and

,

a flow model communicatively linked to said gas molecule animation logic scripts and to a lung compliance and resistance model, said lung compliance and resistance model providing gas pressure data to said flow model and to said user interface responsive to gas volume data produced in said flow model, said flow model dynamically producing said gas flow data for use with said gas molecule animation logic scripts responsive to said gas pressure data provided by said lung compliance and resistance model, and user-activated ventilation modes and settings provided through said user interface for simulating ventilation modes and settings with respect to the simulated pneumatic system.

2. The interactive simulator of claim 1, wherein each of said user interface and visual display of the simulated pneumatic system are disposed in separate views in which only one of separate views is displayed at any one time, and further wherein each of said user interface and said visual display of the simulated pneumatic system comprises a toggle element which when activated can toggle a display of each said separate view.

3. The interactive simulator of claim 1, wherein said images of simulated gas molecules comprise a selection of different gas icons representative of gas present in portions of the visual display of the simulated pneumatic system, each of said different gas icons which represent a different type of gas having a distinguishing characteristic selected from the group consisting of a different color, a different shape and a different shading.

4. The interactive simulator of claim 3, wherein each of said gas molecule animation logic scripts is further configured to obscure from view on the visual display said different gas icons so as to simulate a lack of gas in a portion of said simulated pneumatic system.

5. The interactive simulator of claim 1, further comprising a gas flow truth table and further configured to perform a volume to pressure computation, said gas flow truth table correlating pressure values received from said lung compliance and resistance model with gas flow values, said volume to pressure computation correlating volume values received from said flow model with said pressure values.

6. The interactive simulator of claim 1, wherein each of said user interface, visual display of the simulated pneumatic system, gas molecule animation logic scripts, flow model and lung compliance and resistance model is disposed in a network distributable animation package configured for interpretation and presentation by an animation plug-in to a content browser.

7. The interactive simulator of claim 1, further comprising a set of photographic images of iconic elements of the pneumatic system presented in said visual display of the simulated pneumatic system, wherein individual ones of said set of photographic images can be selected and displayed in said visual display responsive to a selection of a corresponding one of said iconic elements.

8. The interactive simulator of claim 1, wherein said visual display of the simulated pneumatic system comprises a collection of iconic elements representative of an anesthesia machine, said iconic elements simulating a breathing circuit, a low pressure gas distribution system, a high pressure gas distribution system, a mechanical ventilator and a scavenging system.

9. The interactive simulator of claim 8, wherein said logical groupings further comprises a manual ventilator having an activatable iconic representation of a breathing bag which when activated though said display of the anesthesia machine can simulate a physical squeezing of said breathing bag.

10. The interactive simulator of claim 8, wherein said interactive simulator presents an exploded view of a selected portion of the simulated pneumatic system.

11. The interactive simulator of claim 8, wherein individual ones of said iconic elements are configured for activatable zooming.

12. The interactive simulator of claim 1, wherein said visual display of the simulated pneumatic system further comprises a visual slider bar having a plurality of distinctive segments to indicate different time phases of a breath cycle presented concurrently in said simulated pneumatic system.

13. The interactive simulator of claim 1, wherein said simulator computes both a maximum and minimum flow rate and scales computed flow rates of said simulated gas molecules to fall between said maximum and minimum flow rate.

14. The interactive simulator of claim 13, wherein said scaled computed flow rates correspond to flow rates which are displayable in said pneumatic machine display.

15. A method for interactively simulating a pneumatic system comprising the steps of:

visually rendering on a graphical display an iconic representation of the pneumatic system;

visually rendering individual ones of a plurality of gas molecule images for display in the representation of the pneumatic system using gas molecule animation logic scripts responsive to gas pressure data provided by a lung compliance and resistance model, each of said scripts governing an animation of the gas molecule images by causing the gas molecule images to move in a prescribed direction and at a prescribed display rate in the representation of the pneumatic system;

determining gas flow data based upon simulated pressures in the pneumatic system; and

,

changing animation direction and display rates for selected ones of said gas molecule images based upon said determined gas flow data.

16. The method of claim 15, further comprising the steps of:

storing logic code for performing said rendering, determining and changing steps in a server-side content distribution system;

distributing said stored logic code over a computer communications network to a client-side content browser; and

,

performing said rendering, determining and changing steps in said client-side content browser.

17. The method of claim 15, further comprising the steps of:

visually rendering in a separate graphical display an iconic representation of an instrument interface for controlling simulated operation of the pneumatic system; and

,

toggling between a display of said iconic representation of the pneumatic system and said iconic representation of said instrument interface.

18. The method of claim 15, wherein said visually rendering step further comprises the step of displaying iconic representations of gas molecules representing different gases in the pneumatic system, each iconic representation of a gas molecule having at least one distinguishing visual characteristic associated with a specific type of gas.

19. The method of claim 18, further comprising removing said displayed gas molecules from view to simulate an invisible-gas mode of operation of the pneumatic ventilation.

20. The method of claim 15, wherein said rendering step further comprises the step of displaying a digital photograph of an element of said pneumatic system which corresponds to a selected element in said iconic representation.

21. The method of claim 15, wherein said computing step comprises the steps of:

consulting at least one truth table to establish said gas flow data based upon simulated volume based pressure data, simulated ventilation mode data and user established simulated pneumatic system settings; and

,

determining animation direction and display rates for selected ones of said gas molecule images based upon said determined gas flow data in said at least one truth table.

22. The method of claim 15, wherein said rendering step further comprises visually rendering at least one iconic representation gas tank with a specific color code corresponding to at least one user-specified convention selected from the group consisting of a regional convention, national convention, and language.

23. The method of claim 15, wherein said rendering step further comprises rendering at least one visually displayed legend having text in a locally-recognized language.

24. A machine readable storage having stored thereon a computer program for interactively simulating a pneumatic system, the computer program comprising a routine set of instructions for causing the machine to perform the steps of:

visually rendering on a graphical display an iconic representation of the pneumatic system;

visually rendering individual ones of a plurality of gas molecule images for display in the representation of the pneumatic system using gas molecule animation logic scripts responsive to gas pressure data provided by a lung compliance and resistance model, each of said scripts governing an animation of the gas molecule images by causing the gas molecule images to move in a prescribed direction and at a prescribed display rate in the representation of the pneumatic system;

determining gas flow data based upon simulated pressures in the pneumatic system; and

,

changing animation direction and display rates for selected ones of said gas molecule images based upon said determined gas flow data.

25. The method of claim 24, further comprising the steps of:

storing logic code for performing said rendering, determining and changing steps in a server-side content distribution system;

distributing said stored logic code over a computer communications network to a client-side content browser; and

,

performing said rendering, determining and changing steps in said client-side content browser.

26. The method of claim 24, further comprising the steps of:

visually rendering in a separate graphical display an iconic representation of an instrument interface for controlling simulated operation of the pneumatic system; and

,

toggling between a display of said iconic representation of the pneumatic system and said iconic representation of said instrument interface.

27. The method of claim 24, wherein said visually rendering step further comprises the step of displaying iconic representations of gas molecules representing different gases in the pneumatic system, each iconic representation of gas molecule having at least one distinguishing visual characteristic associated with a specific type of gas.

28. The method of claim 27, further comprising removing said displayed gas molecules from view to simulate an invisible-gas mode of operation of the pneumatic ventilation.

29. The method of claim 24, wherein said rendering step further comprises the step of displaying a digital photograph of an element of said pneumatic system which corresponds to a selected element in said iconic representation.

30. The method of claim 24, wherein said computing step comprises the steps of:

consulting at least one truth table to establish said gas flow data based upon simulated volume based pressure data, simulated ventilation mode data and user established simulated pneumatic system settings; and

,

determining animation direction and display rates for selected ones of said gas molecule images based upon said determined gas flow data in said at least one truth table.

31. The method of claim 24, wherein said rendering step further comprises visually rendering at least one iconic representation gas tank with a specific color code corresponding to at least one user-specified convention selected from the group consisting of a regional convention, national convention, and language.

32. The method of claim 24, wherein said rendering step further comprises rendering at least one legend having a localized language.

33. A method of interactively simulating a pneumatic system comprising the steps of:

dividing the pneumatic system into logical component sections for presenting an interactive simulation of the pneumatic system;

visually rendering said logical component sections in a graphical user interface;

permitting user modification of control element settings in said logical component sections; and

,

animating visual images of simulated gas flows within said logical component sections using individually rendered gas molecule icons coupled to corresponding animation scripts responsive to gas pressure data provided by a lung compliance and resistance model, each of said scripts determining an animation direction and animation rate for a corresponding one of said gas molecule icons.