Gas Man Simulates Correct Alveolar Plateaus and Quantifies Overpressure for Desired Alveolar Tension

  • James H. Philip
Conference paper


Gas Man® is a computer simulation1 which uses pictorial and graphical displays to depict anesthetic tension in various compartments representing locations in the anesthesia gas machine, breathing circuit, and patient See Figure 1. The simulation solves the simultaneous differential equations that govern the behavior of the five-compartment model. The model structure knows nothing of exponentials but calculates these and other curves in response to step changes in input variables (vaporizer setting and fresh gas flow) or model parameters (cardiac output and alveolar ventilation)


Alveolar Ventilation Breathing Circuit Solubility Ratio Alveolar Plateau Simultaneous Differential Equation 
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  1. 1.
    Philip JH. Gas Man® - An example of goal oriented computer-assisted teaching which results in learning. Intl J Clin Monitoring & Computing 3: 165, 1986.Google Scholar
  2. 2.
    Philip JH. GAS MAN® - Understanding Anesthesia Uptake and Distribution. MED MAN™ Simulations, PO Box 67–160, Chestnut Hill MA 02167, USA. (Tele 617 277–02117) (FAX 617 732–6798)Google Scholar
  3. 3.
    Garfiled JM, Pak Garfield JM, Paskin S, Philip JH. Anevaluation of the effectiveness of a computersimulation of anesthetic uptake anddistribution as a teaching tool. Med Educ 23:457,1989.CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Tokyo 1992

Authors and Affiliations

  • James H. Philip
    • 1
  1. 1.Brigham and Women’s Hospital, Harvard Medical SchoolBostonUSA

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