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Programmable calculator: a program for use in the intensive care unit.

G N Kenny

    British Journal of Anaesthesia
    |August 1, 1979
    PubMed
    Summary
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    A new calculator program rapidly determines oxygen availability, deadspace, and shunt fraction. This allows for quick therapeutic adjustments and calculation of the fraction of inspired oxygen (FIO2) needed for a target partial pressure of oxygen (PaO2).

    Area of Science:

    • Medical Informatics
    • Respiratory Physiology
    • Computational Medicine

    Background:

    • Accurate assessment of respiratory parameters is crucial for effective patient management.
    • Existing methods for calculating derived respiratory data can be time-consuming.
    • Programmable calculators offer potential for rapid data analysis in clinical settings.

    Purpose of the Study:

    • To develop and validate a programmable calculator program for rapid determination of key respiratory variables.
    • To enable quick adjustments in patient therapy based on real-time data.
    • To utilize the iso-shunt concept for calculating required fraction of inspired oxygen (FIO2).

    Main Methods:

    • Development of a program for a small programmable calculator.
    • Input of relevant patient data to derive oxygen availability, deadspace, and shunt fraction.

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  • Application of the iso-shunt concept for FIO2 calculations.

    • Main Results:

    • The program allows for rapid and accurate determination of derived respiratory data within seconds.
    • Changes in oxygen availability, deadspace, and shunt fraction can be quickly assessed.
    • The required FIO2 for a desired partial pressure of oxygen (PaO2) can be efficiently calculated.

    Conclusions:

    • The developed calculator program significantly enhances the speed and accuracy of respiratory data analysis.
    • This tool facilitates timely therapeutic modifications in patient care.
    • The iso-shunt concept integrated into the program provides a practical method for optimizing oxygen therapy.